REF7541a_sm

Reference Series

7540a 7541a

4 CHANNEL POWER AMPLIFIER

SERVICE MANUAL

Infinity Systems, Inc. 250 Crossways Park Dr.

Woodbury, New York 11797 Rev1 3/2005

- CONTENTS -

SPECIFICATIONS ………………………………….……..1 FEATURES/TEST CONDITIONS……..…………………2 CONTROLS/CONNECTIONS………….……..…...…..…3 INSTALLATION………………….……...……..…...…...…5 BASIC TROUBLESHOOTING..…….…….………………6 TYPICAL SYSTEM WIRING..…….…….……………..…7 EXPLODED VIEW/PARTS LIST…….….….…………....8 MECHANICAL PARTS LIST……………..…………........9 AMPLIFIER BLOCK DIAGRAM…………………………10 P.C.B. DRAWINGS….…………………………………….11 ELECTRICAL PARTS LIST ……………………………. 15 REF 7541a ELECTRICAL PARTS LIST ADDENDUM….……18 IC/TRANSISTOR PINOUTS..………………………. …..19 REF 7540a SCHEMATICS……………………………....22 REF 7541a SCHEMATICS…………………………..…..25 PACKING……..……………………………………..…....28

Reference 7540a/7541a Specifications

Output Power: 111W RMS x 4 channels @ 4 ohms; ≤1% THD + N

(14.4V supply) 139W RMS x 4 channels @ 2 ohms; ≤1% THD + N 278W RMS x 2 channels @ 4 ohms; ≤1% THD + N Signal-to-noise ratio: 81dBA (reference 1W into 4 ohms) Dynamic power: 164W @ 2 ohms Effective damping factor: 6.315 @ 4 ohms Frequency response: 10Hz – 100kHz (–3dB) Maximum input signal: 5.5V Maximum sensitivity: Reference 7540a - 230mV

Reference 7541a - 75mV DC Offset <50mV (-50%) Output regulation: .088dB @ 4 ohms Idle Current 1.2A Input Impedance 22kΩ Max Current Draw 54A @ 4 ohms 83A @ 2 ohms Dimensions: 12 x 15 x 2 11/16” (L x W x D) (305mm x 381mm x 68mm) Fuses: 30A x 2

Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in this and related JBL publications are therefore subject to change without notice.

1

Power Amplifier Reference 7540a/7541a

Reference 7540a/7541a

2

2

• If the amplifier’s fuse must be replaced, useonly the same type and rating as that of theoriginal. Do not substitute another kind.

The Reference amplifiers are capable of delivering high power levels, and require a reliable connection to the vehicle’s electrical system in order to perform optimally. See Figure 1 for connection location. Please adhere to the following instructions carefully.

GROUND CONNECTIONConnect the amplifier’s Ground (GND) terminalto a solid point on the vehicle’s metal chassis, as close to the amplifier as possible. Refer to thechart below to determine minimum wire-gaugesize. Sand away any paint from this location; usea star-type-lock washer to secure the connection.

POWER CONNECTIONConnect a wire (see chart at right for appropriategauge) directly to the vehicle’s positive batteryterminal, and install an appropriate fuse holderwithin 18" of the battery terminal. Do not install the fuse at this time. Route the wire to the amplifier’s location, and connect it to the amplifier’s positive (+12V) terminal. Be sure touse appropriate grommets whenever routingwires through the firewall or other sheet metal.Failure to adequately protect the positive wirefrom potential damage may result in a vehiclefire. When you are done routing and connectingthis wire to the battery and to the amplifier, you may install the fuse at the battery. The fuse value should be selected based on totalamplifier-current draw; see chart at right.

REMOTE CONNECTIONConnect the amplifier’s Remote (REMOTE) terminal to the source unit’s Remote Turn-Onlead using a minimum of 18-gauge wire. If yoursource unit does not have a remote turn-on connection, connect the amplifier’s (REMOTE)terminal to the vehicle’s accessory circuit.

WIRE-GAUGE CHARTAmplifier Maximum Minimum Model Current Draw Wire Gauge7520a 34A #8 AWG7540a/7541a 85A #8 AWGThese recommendations assume 7' – 10' wireruns. If your installation differs markedly, youwill need to adjust the wire gauge accordingly.

SPEAKER CONNECTIONSRefer to the application guides on the pages that follow. Speaker connections should bemade using a minimum of 16-gauge wire.

HIGH-LEVEL INPUT CONNECTIONSThe 7540a/7541a amplifiers areequipped with speaker-level inputs that allowyou to add an amplifier to head units that do not have RCA line outputs. The speaker outputsfor the source unit should be connected to theamplifier using the supplied connector (squarefour-wire plug). Remember to check for properpolarity.

NOTE: When using the low-level or high-levelinputs, the AUX outputs can be used to pass afull-range line-level signal to another amplifier.

Figure 2. Speaker-level connector.

POWER CONNECTIONS

Figure 1.Terminal-connection end plate.

HIGH LEVELINPUT

Speaker Wires(spliced)

LR

–L+

–R+

+ WHITE

– WHITE/BLACK

GRAY/BLACK –

GRAY +


3

The 7540a/7541a can be set up for stereo 4-channel, 3-channel or bridged 2-channel operation, asshown in Figures 7 through 9.

NOTE: For simplicity, Figures 7 through 9 do notshow power, remote and input connections.

NOTE: Minimum speaker impedance for stereo operation is 2 ohms. Minimum speakerimpedance for bridged operation is 4 ohms.

NOTE: “Bass Boost” only affects rear channels.

APPLICATIONS – 7540a/7541a

Figure 7. 7540a/7541a amplifier in 4-channel (stereo) operation to drive front and rear full-range speakers.

Figure 8. 7540a/7541a is set up for 3-channel operation to drive a set of full-range speakers and a subwoofer.

Figure 9. 7540a/7541a used in bridged 2-channel mode to drive a set of components or subwoofers.


4

Initially set the crossover-frequency control midway. While listening to music, adjust thecrossover for the least perceived distortion fromthe speakers, allowing them to reproduce asmuch bass as possible.

Systems using a separate subwoofer set thecrossover mode to HP (high pass) for your full-range speakers. Adjust the crossover frequency to limit bass, and provide increasedsystem volume with less distortion.

For subwoofers, choose the highest frequencythat removes vocal information from the soundof the subwoofer.

If using the 7540a/7541a to drive a subwoofer(s),set the crossover mode to LP (low pass).

SETTING THE CROSSOVER(S)Determine your system plans and set thecrossover-mode switch accordingly. If your system design does not include a subwoofer, set the crossover mode to FLAT and skip to“Setting Input Sensitivity.”

MODE SWITCHFlat: Allows a full-range signal through to thespeakers; can be used with larger full-rangespeakers such as 6" x 9"s.HP: Allows a high-pass signal through to the speakers; should be used with most loudspeakers (can protect your full-range speakers from being overdriven with low frequencies, one cause of speaker damage).LP: Allows bass to pass through to the speakers;should be selected when powering subwoofers.

Figure 13. Control end panel.

SETTING INPUT SENSITIVITY1. Initially turn the INPUT LEVEL control(s) to

minimum (counterclockwise).2. Reconnect the (–) negative lead to the vehi-

cle’s battery. Apply power to the audio systemand play a dynamic music track.

3. On the source unit, increase the volume control to 3/4 volume. Slowly increase theINPUT LEVEL control(s) toward three o’clockuntil you hear slight distortion in the music.Then reduce the INPUT LEVEL slightly untildistortion is no longer heard.

NOTE: After the source unit is on, blue LEDs (onthe top panel) will light, indicating the amplifieris on. If not, check the wiring, especially theremote connection from the source unit. Alsorefer to “Troubleshooting” on the page 6.

INSTALLATION AND SETUP

REMOTE LEVEL CONTROL (OPTIONAL)All three Reference subwoofer amplifiers have inputs for an optionalremote level control (100rc). This will allow thesubwoofer level to be adjusted from the listeningposition. Connect the optional remote level control using the RJ-11 jack on the side of theamplifier. Install the control module in the frontof the vehicle within easy reach of the driver.Both the underside of the dash and the centerconsole are suitable locations. Refer to themounting instructions accompanying the 100rc.

SETTING THE BASS BOOSTThe 7540a/7541a are all equippedwith a bass-boost control. This allows you toenhance the bass output of your system at 50Hz up to 12dB.

NOTE: Only rear channels of the 7540a/7541a are affected by the bass boost control.

AUX OUTPUTReference amplifiers are equippedwith full-range outputs that can be used to connect additional amplifiers.

NOTE: When using the low- or high-level inputs,the AUX outputs can be used to pass a full-rangeline-level signal to another amplifier.


5

7

STATUS LEDsClip: Indicates the amplifier is being overdriven,and your speakers may be in danger. This should blink only on musical peaks, and not be on constantly.Power: Indicates the amplifier is on.Protection: Refer to “Troubleshooting” for specificindications.

Figure 15. LED status.

• PROBLEM:No audio (POWER LED is off).

CAUSE and SOLUTION:No voltage at BATT+ and/or REM terminals, orbad or no ground connection. Check voltagesat amplifier terminals with VOM.

• PROBLEM:No audio (PROTECT LED flashes every 4 seconds).

CAUSE and SOLUTION:DC voltage on amplifier output. Amplifier mayneed service; see enclosed warranty card forservice information.

• PROBLEM:No audio (PROTECT LED is on).

CAUSE and SOLUTION:Amplifier is overheated. Make sure amplifiercooling is not blocked at mounting location;verify that speaker-system impedance is within specified limits.

• PROBLEM:No audio (PROTECT and POWER LEDs flash).

CAUSE and SOLUTION:Voltage less than 9V on BATT+ connection.Check vehicle charging system.

• PROBLEM:No audio (PROTECT LED is on).

CAUSE and SOLUTION:Voltage greater than 16V or less than 8.5V onBATT+ connection. Check vehicle charging system.

• PROBLEM:Distorted audio.

CAUSE and SOLUTION:Input sensitivity is not set properly, or amplifieror source unit is defective. Check INPUT LEVELsetting, or check speaker wires for shorts orgrounds.

• PROBLEM:Distorted audio (PROTECT LED flashes).

CAUSE and SOLUTION:Short circuit in speaker or wire. Remove speaker leads one at a time to locate shortedspeaker or wire, then repair.

• PROBLEM:Music lacks “punch.”

CAUSE and SOLUTION:Speakers are not connected properly. Checkspeaker connections for proper polarity.

TROUBLESHOOTING


6


7

71 2 3 4 5 6 8

A

B

C

D

E


8


9

7540a/7541a BLOCK DIAGRAM


10

J61

15m/m

J26

7.5m/m

J1417.5m/m

R4547

J11510m/m

J66

22m/m

C800

10/16V

C52

4700/50V"HC"

J150

7.5m/m

HI301

LAD1140-04PBK

HI101

LAD1140-04PBK

R3071K

SW102

JSS2219

CON301-1

TM2501-DG-14P

BJ07

55m/m

SW302

JSS2219

J151

7.5m/m

R43322

R23647

C251100P

R233

22

R24322

R2425.6K

J129

7.5m/m

R24647

R2351K

R2451K

R2325.6K

R244

22

R23422

R250120

Q443C3198GR

Q44

FQP50N06

Q431C3198GR

Q442A1266GR

Q233A1266GR

R91 22K

Q232C3198GR

Q231C3198GR

C232100P

C242100P

R25210K

D2511SS133

R2373.9K

C22168P

Q241A1266GR

C3202.2/50V

J12019m/m

R2472.7K

R27113.7KF

C240473(M)

Q242A1266GR

R272820F

R44322

C191

220/16V

R1600.1/3W

D291

1N4744

J17919m/m

R0310/0.5W

J1727.5m/m

J11012.5m/m

R3700.1/3W

D191

1N4744

J174 22m/m

Q243

C3198GR

J55 6m/m

1STPOWER

LWL0640-03P

J13422m/m

C291

220/16V

Q234C1027Y

J8112.5m/m

C371

100/16V

R4425.6K

R350

120

Q244A1023Y

J44

12.5m/m

J79

7.5m/m

Q251C3200GR

Q341

A1266GR

C332100P

C342100P

R4511.5K

C451100P

R1510

J178 22m/m

D3511SS133

R35210K

J1416m/m

J1436m/m

C301

102P

R3373.9K

J1526m/m

J1536m/m

C32168P

Q342A1266GR

J1556m/m

C1412.2/50V

C401

102P

J14810m/m

J16620m/m

R44647

J49

12.5m/m

J14910m/m

R181 56K

J222

7.5m/m

R4311K

R4351K

R3472.7K

R170

0.1/3W

R1311K

R1411K

C340473(M)

R4411K

Q331C3198GR

R33422

Q343

C3198GR

R34422

R3325.6K

J177 22m/m

R37113.7KF

Q334C1027Y

C261

104(M)

R372820F

J112 12.5m/m

C461

104(M)

R3451K

J7515m/m

C471

100/16V

R465

1K

C1312.2/50V

C192

330/16V

J0717.5m/m

L01

CL-510

C62

4700/50V"HC"

J13812.5m/m

J7315m/m

R32122KF

R407

1K

R3411K

J22

10m/m

Q344A1023Y

Q335

TIP35C

J13622m/m

Q345

TIP36C

C4412.2/50V

Q351C3200GR

J92

12.5m/m

J9312.5m/m

C431

2.2/50V

C3312.2/50V

J171 22m/m

J8212.5m/m

Q445

TIP36C

J9917.5m/m

C3412.2/50V

C57

4.7/50V

R42122KF

R5647

Q435

TIP35C

R3351K

R365

1K

J1566m/m

R3311K

R4451K

D52

FR154

WIRE

W1

120m/m

J97 20m/m

C40410P

Q332

C3198GR

Q333A1266GR

C40522P

R472820F

C40622P

J140

6m/m

J7615m/m

C161

104(M)

R40247KF

J113 12.5m/m

C171

100/16V

C1202.2/50V

D53

FR154

D51

FR154

R403

47KF

R12122KF

J117

15m/m

J1547.5m/m

J11820m/m

J1426m/m

J51

15m/m

J83

15m/m

J13722m/m

R90 47K

Q434C1027Y

C220

2.2/50V

R3600.1/3W

J1117.5m/m

L02

CL-510

J65

10m/m

R40647KF

J10217.5m/m

J310

20m/m J1017.5m/m

J64

10m/m

R405

47KF

J130

6m/m

C402

22/16V"SRE"

C60104P

Q145

TIP36C

Q135

TIP35C

J176 22m/m

R172820F

C11

100/16V

R17113.7KF

R34647

J7720m/m

R47113.7KF

C403

22/16V"SRE"

J139

6m/m

C140473(M)

J98 20m/m

R1472.7K

R1373.9K

R4325.6K

J12222m/m

Q441A1266GR

R44422

D42

YG225D2

J9112.5m/m

J16811m/m

R311K

C1447/16V

J13322m/m

R41220/0.5W

R3511.5K

R02

4.7K

C1510/25V

D41

YG225D2

R04

56K

J10017.5m/m

Q340

C3200GR

C181

100/16V

J7815m/m

C33

473P

R61

10K

R058.2K

J158 22m/m

R3425.6K

R401

22KF

R16820

C12100/16V

C13

100/16V

R5347

R123.9K

R34322

R34 15K

J48

12.5m/m

Q440

C3200GR

J16917.5m/m

R43422 Q

240

C3200GR

R3333K

Q140

C3200GR

C21102(M)

R1410K

J2526m/m

C420

2.2/50V

C22104P

R014.7K

Q151C3200GR

R114.7K

R33322

C12168P

Q53

FQP50N06

R3222K

R33647

C61

470/50V

J8417.5m/m

J71

12.5m/m

C63 473P

J8817.5m/m

2NDPOWER

LWL0640-03P

C30410P

J1217.5m/m

Q54

FQP50N06

C53

473P

J35

10m/m

U01

TL494CN

Q43

FQP50N06

J807.5m/m

R2700.1/3W

R2124K

R4600.1/3W

J1717.5m/m

TH01

FTD5-350

R1310K

R2224K

R38156K

R421K

J1917.5m/m

R4347

J2017.5m/m

D54

FR154

Q22A1268GR

Q02C3198GR

Q11A1266GR

R51220/0.5W

R15210K

D031SS133

C351100P

Q12A1266GR

R4472.7K

Q21C3198BL

C440473(M)

Q01A1023Y

R4373.9K

J12611m/m

R150120

D1511SS133

Q33A1266GR

J63

17.5m/m

D041SS133

C361

104(M)

R45210K

C142100P

R28156K

C132100P

Q23A1266GR

Q433A1266GR

J10420m/m

R291

150/2W

C1647/25V

J1166m/m

Q432C3198GR

R191

150/2W

Q281C3198GR

J90

12.5m/m

Q181

C3198GR

C05

2200/25V"WL"

Q144A1023Y

R624.7KF

C42168P J147

10m/m

R161

4.7/0.5W

R450120

Q134C1027Y

C241

2.2/50V

J16711m/m

D4511SS133

R13422

C442100P

C432100P

Q451C3200GR

R30

100/2W

Q143C3198GR

Q142A1266GR

R144

22

R1325.6K

R1451K

R1351K

C08222(M)

J60

15m/m

R14647

R1511.5K

J12122m/m

R1425.6K

R14322

R13322

R13647

J67

22m/m

J175 22m/m

R2311K

Q141A1266GR

C151100P

R4205.6KF

R2205.6KF

R2411K

R22122KF

C2312.2/50V

J13522m/m

C30622P

D011N5404

Q131C3198GR

Q132C3198GR

Q444A1023Y

Q245

TIP36C

Q235

TIP35C

Q133A1266GR

R2511.5K

C30522P

TER02

WT-9519

R30547KF

FH01

WF-9604

J7415m/m

R303

47KF

C302

22/16V"SRE"

C303

22/16V"SRE"

U301

NJM2068LD

J39

10m/m

R30247KF

R30647KF

R301

22KF

U110 NJM2068LD

R469200K

J170

6m/m

J12322m/m

C67

4.7/50V

J323

7.5m/m

J173 22m/m

R2600.1/3W

J125

22m/m

J0617.5m/m

R6010.5KF

J8617.5m/m

R3515K

J251

13m/m

TM0006-01

R43647

R165

1K

R269

200K

C101

102P

C201

102P

R265

1K

R169200K

R369

200K

C271

100/16V

C03 104P

C042200/25V"WL"

R207

1K

R1071K

R48156K

C20410P

C20522P

C20622P

R20247KF

R206

47KF

J8717.5m/m

J10320m/m

R20347KF

J8912.5m/m

R205

47KF

C203

22/16V"SRE"

C202

22/16V"SRE"

J94

12.5m/m

J32115m/m

R20122KF

C31

105(M)TL

C10410P

J320 20m/m

BJ06

35m/m

R162

680/2W

55m/m

105(M)TL

C01

105(M)"TL"

C10622P

J72

12.5m/m

J54

6m/m

J1817.5m/m

J53 6m/m

C10522P

R461

4.7/0.5W

R10547KF

R521K

RCA301

DJB-562D

3RD

C400

104P

WIRE

W260m/m

C200

104P

D02

IN4004

R362

680/2W

R462

680/2W

R262

680/2W

R106

47KF

J47

12.5m/m

C102

22/16V"SRE"

RCA101

DJB-554A

J10817.5m/m

J1657.5m/m

J52 6m/m

R361

4.7/0.5W

R129

100K

C128

4.7/50V"SRE"

C103

22/16V"SRE"

C228

4.7/50V"SRE"

U101

NJM2068LD

R10247KF

R10347KF

J8517.5m/m

R101

22KF

R5547

R4647

Q56

FQP50N06

D269

1SS133

Q90C3198GR

R92 1K

R2568K

SCREW

R5447

J0817.5m/m

J0917.5m/m

Q55

FQP50N06

R4700.1/3W

J1617.5m/mJ1517.5m/m

J1317.5m/m

Q45

FQP50N06

R4447

Q46

FQP50N06

55m/m

J0517.5m/m

L03

CL-310

J11922m/m

J12422m/m

J62

17.5m/m

J159 15m/m

J157 15m/m

J160 17.5m/m

J164 22m/m

C323

22/16V"SRE"

C324

22/16V"SRE"

C423

22/16V"SRE"

C424

22/16V"SRE"

C224

22/16V"SRE"

C223

22/16V"SRE"

C124

22/16V"SRE"

C123

22/16V"SRE"

R123

270K

R124

270K

R223

270K

R224

270K

R222

10KR122

10K

U111

NJM2068LD

R166

1K

R466

1K

R266

1K

R366

1K

R125

10KF

R126

10KF

U310 NJM2068LD

R127

1K

R1281K

C12622P

R229

100K

C22622P

R227

1K

R2281KR22610KF

R22510KF

R322

10KR422

10K

R424

270K

R423

270K

R324

270K

R323

270K

J10717.5m/m

3RD.

BJ08

20m/m

BJ09

35m/m

J322

7.5m/m

J331

7.5m/m

J27

7.5m/m

C51

470/50V

J10912.5m/m

J33020m/m

J163 22m/m

J162 22m/m

J161 22m/m

J13117.5m/m

J12822m/m

J12711m/m

J10117.5m/m

D369

1SS133

J1447.5m/m

J20511m/m

J250

17.5m/m

J20220m/m

J2017.5m/mC

410

104P

C210

104P

J2036m/m

J132

10m/m

J46

12.5m/m

J219

6m/m

J2186m/m

J20910m/m

J21315m/m

R2614.7/0.5W

J20720m/m

J20620m/m

J22812.5m/m

J229

6m/m

J215

10m/m

J22310m/m

J22410m/m

C06

2200/25V"WL"

J22710m/m

CLIP

LWL0640-02P

R3205.6KF

J2006m/m

J22610m/m

D4691SS133

J20810m/m

J2256m/m

J230

6m/m

R1205.6KF

J231

6m/m

D1691SS133

J2146m/m

J30

7.5m/m

J31

7.5m/m

J32

7.5m/m

BJ04

35m/m

J34

10m/m

J38

10m/m

J37

10m/m

J36

10m/m

J42

7.5m/m

J43

7.5m/m

J2126m/m

J2116m/m

R63430K

J204

6m/m

J217

6m/mJ216

6m/m

CON101-1

TM2501-DG-14P

J210

10m/m

C32

473P

D111SS133

J59

25m/m

J11120m/m

J25

7.5m/m

J45

12.5m/m

J28

7.5m/m

C292

330/16V

J11410m/m

SCREW

BJ03

55m/m

J50

12.5m/m

J40

7.5m/m

J41

7.5m/m

J58

10m/m

J57

10m/m

J56

10m/m

J33

6m/m

J29

7.5m/m

J70

23m/m

J21

10m/m

J23

10m/m

J24

10m/m

J300

6m/m

T01

44PHI

SCREW

YELLOW

RED

BK

BK

BK

7540a

FR-INFL-IN

+15VGNDS

FL-OUT

FR-OUTRR-OUTRL-OUT

GNDS-15V -15V

+15V

RR-IN

RL-IN

R-R-

R+R+ L+L+

L-L-

MONO MONOSTEREO STEREO

LRL LR R

R/CHL/CH

4T:11T:8T:8T

(0.7x15):(0.7x4):(0.7x1):(0.7x1)


11

J75

J150

J07

R53

J148

J174

C52

J151

HI301

HI101

R433

SW102

CON301-1

BJ07

SW302

J129

R236

R233

C232

R243

R242

R246

J172

R235

R245

R232

R244

R234

R250

R91

Q431

Q44

Q442

Q233

Q232

R252

Q231

Q241

C242

C221

R237

D351

R247

C332

Q242

C120

J120

R271

R272

C340

Q243

R443

R442

C191

R160

D291

J179

R41

J79

J82

R370

D191

J134

Q234

J141

1STPOWER

J178

C291

Q244

C371

R350

R451Q251

J222

Q341

Q342

C342

C451

R15

C301

R352

J177

D03

R337

J143

J152

C321

R446

J153

J155

C401

Q331

J156

C131

C404

J149

J97

R431

J112

R161

J154

R435

R347

R131

R170

R141

R441

C341

R334

Q343

R344

Q334R332

R371

J136

R372

Q344

C161

R345

J138

C32

R465

J73

C471

R321

C441

C192

J99

L01

C62

J92

J76

R407

R341

R421

J65

Q351

Q335

J171

Q345

C431

Q332

J93

C320

J63

J132

J113

Q445

J11

C57

J160

R335

J81

Q435

R365

R331

J140

R445

R472

D52

W1

J118

C405

Q333

Q434

C406

R402

C60

J142

J117

C140

R403

J91

C171

C141

D53

D51

R121

R90

J80

J310

J130

C261

J78

J176

R406

Q441

C402

R360

J102

L02

J64

R405

J10

J77

J100

R172

J139C403

C08

Q145

Q135

J122

R171

C11

R346

R471

J98

R147

C14

J252

C21

J104

R137

R432

R444

J133

Q340

R31

D42

J168

R351

J158

R51

R04

R35

C420

D41

R61

J169

Q440

C181

J60

C22

R05

R342

J121

R401

R16

R12

C12

C13

R381

R343

R34

R434

J114

Q240

J84

R33

Q140

R14

Q151

C440

R01

J116

C16

C121

R11

Q22

R333

R32

C63

Q53

R336

R21

C61

J88

J90

C304

J12

2NDPOWER

C53

J17

Q54

C351

J147

U01

Q43

R270

R13

R460

J19

TH01

R22

R152

R42

R43

J20

R251

D54

Q02

Q11

Q12

J131

R447

D151

C142

Q21

R437

Q01

C461

Q33

R150

J126

R452

D04

Q23

J06

D451

J71

R62

C132

R52

C421

Q433

Q432

J103

R291

C241

J170

Q281

R191

Q181

J89

Q144

C05

Q134

R450

C442

C240

R134

Q451

C231

J167

D269

R144

C432

C151

Q143

R30

Q142

Q141

R132

R145

R135

R146

C31

J74

R151

R142

J67

R143

R133

R136

R231

J175J135

R420

Q131

C306

R220

R241

R221

R305

C302

J123

C305

D01

Q132

Q444

Q133

Q245

Q235

Q90

J166

C201

TER02

R303

J321

R302

C303

C67

U110

J128

R306

R301

R469

U101

R60

J54

J173

C203

J165

J125

R260

J137

J86

R436

J87

R461

J251

TER01

R165

R265

R269

R129

C34

R169

R369

R207

C271

C204

C04

R107R202

R481

C205

C331

C104R206

R203

J18

J320

R205

J94

R201

C202

C102

J72

J159

R105

C01

C106

J330

R162

C33

R281

C206

J53

J52

C400

R361

R106

R55

RCA301

3RD

C200

W2

C126

D02

R362

R462

R262

C105

C128

RCA101

J85

C03

J203

R261

R102

C103C228

C323

U111

R103

R101

J08

R92

R46

R54

Q56

D369

C800

R25

R123

R44

J09

J16

Q55

R470

J15

J13

J05

Q45

J61

Q46

J62

L03

J124

J164

C251

J157

J213

J163

C324

C423

C424

C224

C223

C124

C123

C101

R124

R223

R224

R222 R122

R166

U310

R466

R266

R366

R125

R126

R127

R128

R229

C226

R227

C410

R228

R226

R225

R322R422

R424

R423

R324

R323

R320

J119

3RD.

C15

R307

J144

C51

J202

J162

J161

J83

J101

U301

J127

J250

D469

J201

J205

R56

J207

C210

R03

J219

J209

J228

J218

J229

J215

J66

C220

J206

J111

J200

J223

J224

J227

C06

J226

CLIP

R120

J225

J208

D169

J230

J231

R63

J214

D11

J212

J51

J210

J211

J204

J217

J216

CON101-1

J115

R181

C361

J59

J55

C292

J14

D251

R02

J70

R45

Q443

T01


12


13


14

TRS-00-00087 TRANSISTOR SMALL SIGNAL PNP KTA1023Y Q01,144,244,344,444 5

TRS-00-00088 TRANSISTOR SMALL SIGNAL NPN KTC1027Y Q134,234,334,434 4

TRS-00-00091 TRANSISTOR SMALL SIGNAL PNP KTA1268GR Q22 1

TRS-00-00111 TRANSISTOR SMALL SIGNAL NPN KTC3200GR Q151,251,351,451 4

TRS-00-00110 TRANSISTOR SMALL SIGNAL NPN KTC3198GR Q02,90,131,132,143,181,231,232,243,281 16

Q331,332,343,431,432,443

TRS-00-00090 TRANSISTOR SMALL SIGNAL PNP KTA1266GR Q11,12,23,33,133,141,142,233,241,242 16

Q333,341,342,433,441,442

TRS-00-00109 TRANSISTOR SMALL SIGNAL NPN KTC3198BL Q21 1

DIO-00-00108 DIODE FAST RECOVERY FR154 D51,52,53,54 4

DIO-00-00003 DIODE RECTIFIER IN4004 D02 1

DIO-00-00006 DIODE SWITCHING SIGNAL 1SS133 D03,04,11,151,169,251,269,351,369,451 11

D469

RES-00-00586 RESISTOR METAL FILM 1/5WF 820 OHM R172,272,372,472 4

RES-00-00523 RESISTOR METAL FILM 1/5WF 4.7K OHM R62 1

RES-00-00545 RESISTOR METAL FILM 1/5WF 5.6K OHM R120,220,320,420 4

RES-00-00402 RESISTOR METAL FILM 1/5WF 10K OHM R125,126,225,226 4

RES-00-00399 RESISTOR METAL FILM 1/5WF 10.5K OHM R60 1

RES-00-00417 RESISTOR METAL FILM 1/5WF 13.7K OHM R171,271,371,471 4

RES-00-00467 RESISTOR METAL FILM 1/5WF 22K OHM R101,121,201,221,301,321,401,421 8

RES-00-00537 RESISTOR METAL FILM 1/5WF 47K OHM R102,103,105,106,202,203,205,206,302,303 16

R305,306,402,403,405,406

RES-00-00610 RESISTOR CARBON FILM 1/5WJ 10 OHM R15 1

RES-00-00660 RESISTOR CARBON FILM 1/5WJ 22 OHM R133,134,143,144,233,234,243,244,333,334 16

R343,344,433,434,443,444

RES-00-00716 RESISTOR CARBON FILM 1/5WJ 47 OHM R43,44,45,46,53,54,55,56,136,146 16

R236,246,336,346,436,446

RES-00-00615 RESISTOR CARBON FILM 1/5WJ 120 OHM R150,250,350,450 4

RES-00-00756 RESISTOR CARBON FILM 1/5WJ 820 OHM R16 1

RES-00-00633 RESISTOR CARBON FILM 1/5WJ 1K OHM R31,42,52,92,107,127,128,131,135,141 36

R145,165,166,207,227,228,231,235,241,245

R265,266,307,331,335,341,345,365,366,407

R431,435,441,445,465,466

RES-00-00598 RESISTOR CARBON FILM 1/5WJ 1.5K OHM R151,251,351,451 4

RES-00-00644 RESISTOR CARBON FILM 1/5WJ 2.7K OHM R147,247,347,447 4

RES-00-00676 RESISTOR CARBON FILM 1/5WJ 3.9K OHM R12,137,237,337,437 5

RES-00-00702 RESISTOR CARBON FILM 1/5WJ 4.7K OHM R01,02,11 3

RES-00-00720 RESISTOR CARBON FILM 1/5WJ 5.6K OHM R132,142,232,242,332,342,432,442 8

RES-00-00751 RESISTOR CARBON FILM 1/5WJ 8.2K OHM R05 1

RES-00-00608 RESISTOR CARBON FILM 1/5WJ 10K OHM R13,14,61,122,152,222,252,322,352,422 11

R452

RES-00-00623 RESISTOR CARBON FILM 1/5WJ 15K OHM R34,35 2



RES-00-00687 RESISTOR CARBON FILM 1/5WJ 33K OHM R33 1


RES-00-00730 RESISTOR CARBON FILM 1/5WJ 56K OHM R04,181,281,381,481 5



RES-00-00647 RESISTOR CARBON FILM 1/5WJ 200K OHM R169,269,369,469 4

RES-00-00664 RESISTOR CARBON FILM 1/5WJ 270K OHM R123,124,223,224,323,324,423,424 8


RES-00-00053 RESISTOR METAL FILM 1/2WJ 4.7 OHM R161,261,361,461 4

RES-00-00018 RESISTOR METAL FILM 1/2WJ 10 OHM R03 1

RES-00-00038 RESISTOR METAL FILM 1/2WJ 220 OHM R41,51 2

ELC-00-00223 CAPACITOR ELECTROLYTIC "SMS" 2.2/50V C120,131,141,220,231,241,320,331,341,420 12

C431,441

ELC-00-00229 CAPACITOR ELECTROLYTIC "SMS" 4.7/50V C57,67 2

ELC-00-00195 CAPACITOR ELECTROLYTIC "SMS" 10/16V C800 1




Electrical Parts List


15

ELC-00-00199 CAPACITOR ELECTROLYTIC "SMS" 100/16V C11,12,13,171,181,271,371,471 8

ELC-00-00200 CAPACITOR ELECTROLYTIC "SMS" 220/16V C191,291 2

ELC-00-00201 CAPACITOR ELECTROLYTIC "SMS" 330/16V C192,292 2

ELC-00-00250 CAPACITOR ELECTROLYTIC "SRE" 4.7/50V C128,228 2

ELC-00-00641 CAPACITOR ELECTROLYTIC "SRE" 22/16V C102,103,123,124,202,203,223,224,302,303 16

C323,324,402,403,423,424

MYC-00-00020 CAPACITOR MYLAR 5% 100V 102(M) J C21 1

MYC-00-00031 CAPACITOR MYLAR 5% 100V 222(M) J C08 1

MYC-00-00038 CAPACITOR MYLAR 5% 100V 473(M) J C140,240,340,440 4

MYC-00-00094 CAPACITOR MYLAR 5% 100V 104(M) J C161,261,361,461 4

MYC-00-00085 CAPACITOR MYLAR 5% 63V "TL" 105(M) J C01,31,34 3

CEC-00-00077 CAPACITOR CERAMIC DISK 50V "NPO" 10P F C104,204,304,404 4

CEC-00-00090 CAPACITOR CERAMIC DISK 50V "NPO" 22P F C105,106,126,205,206,226,305,306,405,406 10

CEC-00-00108 CAPACITOR CERAMIC DISK 50V "NPO" 68P F C121,221,321,421 4

CEC-00-00073 CAPACITOR CERAMIC DISK 50V "NPO" 100P F C132,142,151,232,242,251,332,342,351,432 12

C442,451

CEC-00-00074 CAPACITOR CERAMIC DISK 50V 102P F C101,201,301,401 4

CEC-00-00102 CAPACITOR CERAMIC DISK 50V 473P F C32,33,53,63 4

CEC-00-00076 CAPACITOR CERAMIC DISK 50V 104P F C03,22,60,200,210,400,410 7

JUP-00-00043 JUMPER 0OHM JUMPER 6m/m J33,52,53,54,55,116,130,139,140,141 33

J142,143,152,153,155,156,170,200,203,204

J211,212,214,216,217,218,219,225,229,230

J231,252,300

JUP-00-00044 JUMPER 0OHM JUMPER 7.5m/m J25,26,27,28,29,30,31,32,40,41 26

J42,43,79,80,129,144,150,151,154,165

J172,201,222,322,323,331


J56,57,58,64,65,114,115,132,147,148

J149,208,209,210,215,223,224,226,227

JUP-00-00052 JUMPER 0OHM JUMPER 11m/m J126,127,167,168,205 5


J82,89,90,91,92,93,94,109,110,112

J113,138,228

JUP-00-00059 JUMPER 0OHM JUMPER 13m/m J251 1


J157,159,213,321


J15,16,17,18,19,20,62,63,84,85

J86,87,88,99,100,101,102,107,108,131

J160,169,250

JUP-00-00074 JUMPER 0OHM JUMPER 19m/m J120,179 2


J207,310,320,330


J134,135,136,137,158,161,162,163,164,171

J173,174,175,176,177,178



ICO-00-00022 I.C P.W.M TL494CN U01 1

ICO-00-00112 I.C DUAL OP AMP "SIP-08P" NJM2068LD U101,110,111,301,310 5

FET-00-00023 F.E.T N-CH MOSFET FQP50N06 Q43,44,45,46,53,54,55,56 8

TRS-00-00188 TRANSISTOR AUDIO POWER NPN TIP35C Q135,235,335,435 4

TRS-00-00207 TRANSISTOR AUDIO POWER PNP TIP36C Q145,245,345,445 4

TRS-00-00111 TRANSISTOR SMALL SIGNAL NPN KTC3200GR Q140,240,340,440 4

DIO-00-00152 DIODE FAST RECOVERY YG225D2 D41,42 2

DIO-00-00048 DIODE RECTIFIER 1N5404 D01 1

DIO-00-00206 DIODE ZENER 1W 15V 1N4744A D191,291 2RES-00-01046 RESISTOR MOR/S 2WJ 100 OHM (3.8x11m/m) R30 1

RES-00-01264 RESISTOR MOR/S 2WJ 150 OHM (3.8x11m/m) R291 1

RES-00-01265 RESISTOR MOR/S 2WJ 150 OHM (3.8x11m/m) R191 1

RES-00-01041 RESISTOR MOR/S 2WJ 680 OHM (3.8x11m/m) R162,262,362,462 4

RES-00-00895 RESISTOR WIRE WOUND 3WJ 0.1 OHM (5.5x15m/m) R160,170,260,270,360,370,460,470 8

Electrical Parts List cont'd


16

THS-00-00013 THERMISTOR NTC RESISTOR FTD5-350 TH01 1

ELC-00-00234 CAPACITOR ELECTROLYTIC "SMS" 470/50V (12.5x20m/m) C51,61 2

ELC-00-00727 CAPACITOR ELECTROLYTIC "WL" 2200/25V (16x25m/m) C04,05,06 3

ELC-00-00714 CAPACITOR ELECTROLYTIC "HC/DL" 4700/50V (25x30m/m) C52,62 2COR-TF-00405 CORE 44PHI MAGNETICS T01 , 4(0.7x15):11(0.7x4):8(0.7x1):8(0.7x1) 1

COI-00-00093 INDUCTOR DRUM COIL CL-510 L01,02 2

COI-00-00028 INDUCTOR BAR COIL CL-310 L03 1

SWI-00-00024 SWITCH SLIDE SWITCH JSS-2219 SW102,302 2

JAC-00-00043 RCA JACK GOLD PLATED DJB-554A RCA101 1

JAC-00-00042 RCA JACK GOLD PLATED DJB-562D RCA301 1

TER-00-00030 TERMINAL GOLD PLATED TM0006-01 (3P) TER01 1

TER-00-00021 TERMINAL GOLD PLATED 8P WT-9519 TER02 1

JUP-00-00005 JUMPER METAL JUMPER 55m/m BJ01,02,03,07 4

JUP-00-00003 JUMPER METAL JUMPER 35m/m BJ04,06,09 3

JUP-00-00001 JUMPER METAL JUMPER 20m/m BJ08 1

HOD-00-00011 FUSE HOLDER WF-9604 Fh01 1

CON-00-00002 WAFER LWL0640-2P CLIP 1

CON-00-00033 WAFER LWL0640-3P 1ST POWER,2ND POWER 2

CON-00-00128 WAFER LAD1140-04PBK HI101,301 2

WIR-00-00208 WIRE ASS'Y 300m/m CHD1140-04PBK ACCESSORY 2

WIR-00-00015 WIRE AWG #22 BK 3.2PHI RING LUG 60m/m W2 1

WIR-00-00018 WIRE AWG #22 BK 3.2PHI RING LUG 120m/m W1 1

HED-00-00115 HEADER PIN SOCKET TM2501-DG-14P 14P CON101-1,301-1 2

TUB-00-00008 TEFLON TUBE 0.7PHI 10m/m TH01,Q140,240,340,440 6

FUS-AT-00006 AUTO FUSE 30A SET2+ACCESSORY2 4

ICO-00-00113 I.C DUAL OP AMP "SOP-08" NJM2068M U102,103,104,105,302,303,304,305,306,307 10RES-08-00239 RESISTOR SMD 0805 1/10WF 9.31K OHM R257,457 2

RES-08-00022 RESISTOR SMD 0805 1/10WF 15K OHM R155,255,355,455 4

RES-08-00088 RESISTOR SMD 0805 1/10WF 47K OHM R256,456 2

RES-08-00117 RESISTOR SMD 0805 1/10WF 91K OHM R156,356 2RES-08-00225 RESISTOR SMD 0805 1/10WJ 820 OHM R108,208,308,408 4

RES-08-00148 RESISTOR SMD 0805 1/10WJ 1K OHM R391,392,491,492 4

RES-08-00201 RESISTOR SMD 0805 1/10WJ 5.6K OHM R113,115,213,215,313,315,413,415 8

RES-08-00210 RESISTOR SMD 0805 1/10WJ 6.8K OHM R396,496 2

RES-08-00132 RESISTOR SMD 0805 1/10WJ 10K OHM R110,111,112,114,210,211,212,214,310,311 16

R312,314,410,411,412,414

RES-08-00187 RESISTOR SMD 0805 1/10WJ 39K OHM R393,493 2

RES-08-00141 RESISTOR SMD 0805 1/10WJ 150K OHM R397,497 2

CEC-08-00023 CAPACITOR SMD 0805 22pF C156,356 2

CEC-08-00037 CAPACITOR SMD 0805 39pF C256,456 2

CEC-08-00042 CAPACITOR SMD 0805 47pF C111,211,311,393,411,493 6

CEC-08-00040 CAPACITOR SMD 0805 473pF C195,196,295,296,395,396,495,496 8

MYC-00-00157 CAPACITOR MYLAR 5% 63V "TL" 823J C113,115,213,215,313,315,413,415 8

MYC-00-00083 CAPACITOR MYLAR 5% 63V "TL" 104J C391,392,491,492 4

ELC-00-00241 CAPACITOR ELECTROLYTIC"SRE" 10/16V C125,155,225,255,325,355,425,455 8

SWI-00-00033 SWITCH SLIDE SWITCH JSS2319 SW101,301 2VOL-00-00349 VOLUME V9M(7x5) G3(PH2R)N 15S 3B20KBx2 VR101,301,303 3

VOL-00-00351 VOLUME V9M(7x5) G(4R)(PH2R)N 15S 15C50KCx4 VR102,302 2

HED-00-00249 PIN CONNECTOR TM2008-D76G-14P 14P CON101,301 2

ICO-00-00095 I.C COMPARATOR DIP-8P KIA393P U90 1

RES-00-00437 RESISTOR METAL FILM 1/5WF 1K OHM R97 1





RES-00-00635 RESISTOR CARBON FILM 1/5WJ 1M OHM R98 1

RES-00-00029 RESISTOR METAL FILM 1/2WJ 1K OHM R192,292 2

CEC-00-00005 CAPACITOR CERAMIC TUBULAR 50V 103P C91,92,93 3

CEC-00-00006 CAPACITOR CERAMIC TUBULAR 50V 104P C90 1

DIO-00-00321 LED BLUE 3PHI MS-L330CBHSK LED1,2,3 3

CON-00-00139 WAFER LAL0640-2P CLIP 1

CON-00-00140 WAFER LAL0640-3P 1ST POWER,2ND POWER 2

WIR-AS-00220 WIRE ASS'Y BK,RED CHL0640-2P(300m/m) CLIP 1

WIR-AS-00218 WIRE ASS'Y BK,RED,GREEN CHL0640-3P(300m/m) 1ST POWER 1

WIR-AS-00219 WIRE ASS'Y BK,YELLOW,GREEN CHL0640-3P(300m/m) 2ND POWER 1

Electrical Parts List cont'd


17

Reference 7541a Electrical Parts List Addendum

The following chart below represents the only electrical parts differences in 7540a and 7541a models: MODEL PART NAME PART NUMBER SPEC DESIGNATOR REF 7540a RESISTOR RES-00-00586 1/5WF 820 OHM R172,272,372,472

1 REF 7541a RESISTOR RES-00-00437 1/5WF 1K OHM R172,272,372,472 REF 7540a RESISTOR RES-00-00417 1/5WF 13.7K OHM R171,271,371,471

2 REF 7541a RESISTOR RES-00-00508 1/5WF 33K OHM R171,271,371,471 REF 7540a RESISTOR RES-08-00225 SMD 0805 1/10WJ 820 OHM R108,208,308,408

3 REF 7541a RESISTOR RES-08-00242 SMD 0805 1/10WF 240 OHM R108,208,308,408


18


19


20


21

71 2 3 4 5 6 8

A

B

C

D

E

C800

10/16V

C06

2200/25"WL"

R54

47

R44

47

Q55

FQP50N06

R01

4.7K

Q01

A1023Y

R02

4.7K

Q02

C3198GR

R05

8.2K

R04

56K

C05

2200/25"WL"

C03

104P

R35

15KC34

105(M)"TL"

C01

105(M)"TL"

C61

4700/50V"HC/DL"

C51

470/50V"SMS"

D02

1N4004

R61

10K

TH01

50KTH

C67

4.7/50V

C57

4.7/50V

D52

FR154

D51

FR154

D53

FR154

C63

473P

D54

FR154

R11

4.7K

R12

3.9K

C11

100/16V

Q11

A1266GR

Q12

A1266GR

R25

68K

R13

10K

R14

10K C12

100/16V

D11

1SS133

R16

820

R31

1K

R32

22K

C15

10/25V

R33

33K

Q22

A1268GR

R34

15K

C16

47/25V

PROT

C33

473P

U01

TL494CN

R21

24K

C21

102(M)

R22

24K C13

100/16V

C14

47/16V

R03

10/0.5W

R41

220/0.5W

Q23

A1266GR

C04

2200/25"WL"

D04

1SS133

R60

10.5KF

R42

1K

R43

47

R53

47

R52

1K

D03

1SS133

Q33

A1266GRR51

220/0.5W

D01

1N5404

L03

CL-310

FH01

30Ax2

R46

47

T01

44PHI=4T:11T:8T:8T

Q54

FQP50N06

Q43

FQP50N06

Q21

C3198BL

D41

YG225D2

D42

YG225D2

C52

4700/50V"HC/DL"

C62

470/50V"SMS"

C22

104P

R15

10

C08

222(M)

R30

100/2W

R45

47

C32

473P

W1

120m/m

C31

105(M)"TL"

C53

473P

Q53

FQP50N06

L01

CL-510

L02

CL-510

C60

104P

R62

4.7KF

VCC

VEE

VCC2

VEE2

R55

47

R56

47

Q56

FQP50N06

Q44

FQP50N06

Q46

FQP50N06

Q45

FQP50N06

WF9604

R90

47K

R91

22K

R92

1K

Q90

C3198GR

R63

430K

W2

60m/m

PRT-LED

14.4V13.61V13.54V

0.68V

4.44V

12.89V

13.54V

5.06V

5.05V

6.16V

0V

0V

38.86V

38.86V

0V

11.34V

-38.86V

38.86V

-28V

28V

14.4V

B+SW

(0.7x15):(0.7x4):(0.7x1):(0.7x1)

CASE GND CASE GND

16 15 14 13 12 11 10 9

87654321

B+

REM

22

71 2 3 4 5 6 8

A

B

C

D

E

HI-INPUT

HI101

LAD1140-04PBK

R105

47KF

C128

4.7/50V"SRE"

R241

1K

C241

2.2/50V

R231

1K

C231

2.2/50V

R142

5.6K

R141

1K

C141

2.2/50V

R132

5.6K

RCA101-A

DJB-554A

R122

10K

C211

47P

U111-A

1

3

2

NJM2068LD

+

-

VR101-A

20KB

R110

10K

U102-B

NJM2068M

75

6

4

R222

10K

U102-A8

3

21

NJM2068M

U105-B

7

6

5

NJM2068M

-

+

R115

5.6K

PROT

C228

4.7/50V"SRE"

U103-B

7

6

5

NJM2068M

-

+

R256 47KF

C132

100P

R257

9.31KF

R255

15KF

R126

10KF

C256

39P

C155

10/16V"SRE"

U104-B

7

6

5

NJM2068M

-

+

VR101-B

20KB

R108

820

R123

270K

C113

823M"TL"

R21410K

VEE2

R2135.6K

R156 91KF

C15622P

R155

15KF

R206

47KF

C255

10/16V"SRE"

C215

823M"TL"

R205

47KF

R131

1K

C131

2.2/50V

C102

22/16V"SRE"

U111-B

7

5

6

NJM2068LD

+

-

R225

10KF

R228

1KRCA101-D

DJB-554A

VEE

R229

100K

RCA101-B

DJB-554A

C101

102P

R127

1K

U101-B

7

6

5

NJM2068LD

-

+

R129

100K

RCA101-C

DJB-554A

R203

47KF

C204

10P

R201

22KF

R202

47KF

C203

22/16V"SREz"

C202

22/16V"SRE"

C181

100/16V

R281

56K

R227

1K

C120

2.2\50V

R112

10K

R208

820C201

102P

C123

22/16V"SRE"

C124

22/16V"SRE"

R207

1K

R21110K

R128

1K

VEE

VCC

VCC

C232

100P

TER02-A

WT-9519

C224

22/16V"SRE"

R120

5.6KF

VR102A

50KC

C223

22/16V"SRE"

C121

68P

C220

2.2\50V

R107

1K

R106

47KF

R226

10KF

C221

68P

R124

270K

R221

22KF

VR102C

50KC

R121

22KF

R220

5.6KF

R247

2.7K

R224

270K

U101-A

1

2

3

NJM2068LD

-

+

R11110K

VR102D

50KC

C115

823M"TL"

R113

5.6K

R114

10K

R245

1K

R243

22

R244

22

R233

22

SW101-A

JSS2319

C111

47P

VR102B

50KC

SW101-B

JSS2319

R212

10K

C213

823M"TL"

VCC2

R242

5.6K

Q281

C3198GR

U104-A

1

2

3

NJM2068M

-

+

Q181

C3198GRR181

56K

Q151

C3200GR

C151

100PD151

1SS133

R152

10K

C161

104(M)

R161

4.7/0.5W

R151

1.5K

R171

13.7KF

C171

100/16V

R172

820F

C291

220/16V

D291

1N4744(15V)

R291

150/2W

R160

0.1/3W

Q135

TIP35C

Q145

TIP36C

Q144

A1023Y

Q134

C1027Y

R150

120

R136

47

R146

47

Q143

C3198GR

R137

3.9K

Q140

C3200GR

Q133

A1266GR

D191

1N4744(15V)

C191

220/16VR191

150/2W

R135

1K

R134

22

R133

22

R144

22

R143

22

R145

1K

U103-A

1

2

3

NJM2068M

-

+

R215

5.6K

U105-A

1

2

3

NJM2068M

-

+

R210

10K

R125

10KF

R147

2.7K

R223

270K

Q141

A1266GR

Q142

A1266GR

Q132

C3198GR

Q131

C3198GR

R262

680/2W

R162

680/2W

R170

0.1/3W

C242

100P

C142

100P

R234

22

R235

1K

Q231

C3198GR

Q232

C3198GR

Q242

A1266GR

Q241

A1266GR

Q233

A1266GR

Q240

C3200GR

R237

3.9K

Q243

C3198GR

R246

47

R236

47

R250

120

Q234

C1027Y

Q244

A1023Y

Q245

TIP36C

Q235

TIP35C

C206

22P

C271

100/16V

R272

820F

R271

13.7KF

R251

1.5K

R261

4.7/0.5W

C261

104(M)

R252

10K

R232

5.6K

D251

1SS133C251

100P

Q251

C3200GR

C240

473(M)

C140

473(M)

C192

330/16V

C292

330/16V

C400

104P

C200

104P

R103

47KF

C104

10P

R101

22KF

R102

47KF

C103

22/16V"SRE"

FRONT-R

REAR-R

U110-A

1

3

2

NJM2068LD

+

-

R166

1K

R165

1K

FRONT-R

FRONT-L

R266

1K

U110-B

7

6

5

NJM2068LD

-

+

R265

1K

REAR-L

FRONT-L

C205

22P

C106

22P

C105

22P

C126

22P

C226

22P

R270

0.1/3W

C225

10/16V"SRE"

C125

10/16V"SRE"

R2600.1/3W

SW102

JSS2219

C410

104P

C210

104P

C195

473P

C196

473P

C296

473P

C295

473P

CLIP

D169

1SS133

R169

200K

R269

200K

D269

1SS133

CLIP

37.78V

-0.61V

0.57V

0.89V

0.38V

0V

0V

0V

-0.28V

-37.74V

-0.94V

-0.41V

37.78V

0.89V

0.38V

0V

-0.28V

-0.61V

0.57V

-37.74V

-0.94V

-041V

-38.86V

38.86V

-15V

+15V

38.86V

28V

-28V-15V

-38.85V

38.78V

+15V

+15V

-15V

+15V

STEREO

MONO

L-OUT

LOW INPUT L-CH

LOW INPUT R-CH

R-OUT

-15V

FLAT

FLAT

HPF

HPF

LPF

LPF

A

F/LOUT

F/ROUT

+

-

-

+

32-320Hz VARIABLE X-OVER

23

71 2 3 4 5 6 8

A

B

C

D

E

C461

104(M)

R461

4.7/0.5W

R342

5.6K

C441

2.2/50V

R332

5.6K

R420

5.6KF

R320

5.6KF

C411

47P

R310

10K

U305-B

7

6

5

NJM2068M

-

+

R315

5.6K

R481

56K

PROT

C320

2.2\50V

SW301-B

JSS2319

U303-B

7

6

5

NJM2068M

-

+

U304-B

7

6

5

NJM2068M

-

+

C313

823M"TL"

R414

10K

SW301-A

JSS2319

R413

5.6K

TER02-B

WT-9519

C415

823M"TL"

C321

68P

C420

2.2\50V

C421

68P

R421

22KF

R321

22KF

R447

2.7K

R445

1K

R443

22

R444

22

R433

22

VEE

VEE R361

4.7/0.5W

R381

56K

Q351

C3200GR

C351

100PD351

1SS133

R352

10K

R351

1.5K

R371

13.7KF

C371

100/16V

R372

820F

R360

0.1/3W

Q335

TIP35C

Q345

TIP36C

Q344

A1023Y

Q334

C1027Y

R350

120

R336

47

R346

47

Q343

C3198GR

R337

3.9K

Q340

C3200GR

Q333

A1266GR

C331

2.2/50V

R335

1K

R334

22

R333

22

R312

10K

R344

22

R343

22

R345

1K

R347

2.7K

Q341

A1266GR

Q342

A1266GR

Q332

C3198GR

Q331

C3198GR

C442

100P

C342

100P

R434

22

R435

1K

Q431

C3198GR

Q432

C3198GR

R370

0.1/3W

R442

5.6K

A

Q442

A1266GR

Q441

A1266GR

Q433

A1266GR

C432

100P

Q440

C3200GR

R437

3.9K

Q443

C3198GR

R446

47

C340

473(M)

R331

1K

C440

473(M)

R462

680/2W

R362

680/2W

R451

1.5K

R471

13.7KF

VCC

R472

820F

C471

100/16V

C493

47P

Q435

TIP35C

Q445

TIP36C

Q444

A1023Y

Q434

C1027Y

C341

2.2/50V

C492

104(M)"TL"

R441

1K

R450

120

U307-B

7

5

6

NJM2068M

+

-

Q451

C3200GR

R341

1K

R436

47

C325

10/16V"SRE"

VCCR431

1K

R496

6.8K

C431

2.2/50V

C305

22P

R493

39K

C451

100P

R497

150K

D451

1SS133

C361

104(M)

R452

10K

VR303-A

20KB

C332

100P

R432

5.6K

C306

22P

R492

1K

R4911K

R41110K

C405

22P

VR302A

50KC

C393

47P

R465

1K

C392

104(M)"TL"

U310-B

7

6

5

NJM2068LD

-

+

U306-B

7

5

6

NJM2068M

+

-

R396

6.8K

R393

39K

R466

1K

REAR-L

VR302C

50KC

REAR-R

R365

1K

R397

150K

R366

1K

U310-A

1

3

2

NJM2068LD

+

-

C303

22/16V"SRE"

R302

47KF

R301

22KF

VR303-B

20KB

C304

10P

R303

47KF

C406

22P

R31110K

VR302D

50KC

R423

270K

U301-A

1

2

3

NJM2068LD

-

+

R424

270K

R324

270K

R470

0.1/3W

R392

1K

R306

47KF

R307

1K

C315

823M"TL"

C423

22/16V"SRE"

R3911K

R313

5.6K

R314

10K

C311

47P

C424

22/16V"SRE"

VR302B

50KC

C491

104(M)"TL"

R412

10K

U307-A

1

3

2

NJM2068M

+

-

U306-A

1

3

2

NJM2068M

+

-

C413

823M"RL"

U304-A

1

2

3

NJM2068M

-

+

R407

1K U303-A

1

2

3

NJM2068M

-

+

R415

5.6K

C324

22/16V"SRE"

U305-A

1

2

3

NJM2068M

-

+

C323

22/16V"SRE"

R410

10K

C391

104(M)"TL"

R369

200K

R460

0.1/3W

C401

102P

R408

820

C402

22/16V"SRE"

C403

22/16V"SRE"

R402

47KF

R401

22KF

C404

10P

R403

47KF U301-B

7

6

5

NJM2068LD

-

+

C301

102P

RCA301-B

DJB-562D

C302

22/16V"SRE"

R405

47KF

C455

10/16V"SRE"

R406

47KF

R355

15KF

C356 22P

R356 91KF

R323

270K

R308

820

VR301-B

20KB

C355

10/16V"SRE"

C456

39P

R455

15KFR457

9.31KF

R456 47KF

U302-A8

3

21

NJM2068M

R422

10K

U302-B

NJM2068M

75

6

4

VR301-A

20KB

R322

10K

RCA301-A

DJB-562D

R305

47KF

HI-INPUT

HI301

LAD1140-04PBK

C425

10/16V"SRE"

SW302

JSS2219

CLIP

CLIP

D369

1SS133

C495

473P

C496

473P

C396

473P

C395

473P

D469

1SS133

R469

200K

37.78V

0.89V

0.38V

0V

-0.61V

0.57V

-37.74V

-0.94V

-0.28V

-0.41V

37.78V

0.89V

0.38V

0V

-0.41V

-0.94V

-37.74V

-0.61V

0.57V

-0.28V

-38.86V

37.78V

37.78V

-15V

+15V

-15V

-38.86V

38.86V

+15V

+15V

-15V

+15V

STEREO

MONO

LOW INPUT L-CH

LOW INPUT R-CH

-15V

FLAT

FLAT

HPF

HPF

LPF

LPF

R/LOUT

R/ROUT

+

-

-

+

50Hz 0~12dB BASSBOOST32-320Hz VARIABLE X-OVER

24

C800

10/16V

C06

2200/25"WL"

R54

47

R44

47

Q55

FQP50N06

R01

4.7K

Q01

A1023Y

R024.7K

Q02C3198GR

R05

8.2K

R04

56K

C052200/25"WL"

C03

104P

R35

15KC34

105(M)"TL"

C01

105(M)"TL"

C61

4700/50V"HC/DL"

C51

470/50V"SMS"

D02

1N4004

R61

10K

TH01

50KTH

C67

4.7/50V

C574.7/50V

D52

FR154

D51

FR154

D53

FR154

C63

473P

D54

FR154

R11

4.7K

R12

3.9K

C11

100/16V

Q11

A1266GR

Q12

A1266GR

R25

68K

R1310K

R14

10K C12

100/16V

D11

1SS133

R16

820

R311K

R32

22K

C15

10/25V

R33

33K

Q22A1268GR

R3415K

C16

47/25V

PROT

C33

473P

U01

TL494CN

R21

24K

C21

102(M)

R22

24K C13

100/16V

C1447/16V

R03

10/0.5W

R41

220/0.5W

Q23

A1266GR

C04

2200/25"WL"

D04

1SS133

R60

10.5KF

R42

1K

R43

47

R53

47

R52

1K

D031SS133

Q33

A1266GRR51

220/0.5W

D01

1N5404

L03

CL-310

FH01

30Ax2

R46

47

T01

44PHI=4T:11T:8T:8T

Q54

FQP50N06

Q43

FQP50N06

Q21

C3198BL

D41

YG225D2

D42

YG225D2

C52

4700/50V"HC/DL"

C62

470/50V"SMS"

C22104P

R1510

C08

222(M)

R30100/2W

R45

47

C32

473P

W1

120m/m

C31

105(M)"TL"

C53

473P

Q53

FQP50N06

L01CL-510

L02CL-510

C60

104P

R62

4.7KF

VCC

VEE

VCC2

VEE2

R55

47

R56

47

Q56

FQP50N06

Q44

FQP50N06

Q46

FQP50N06

Q45

FQP50N06

WF9604

R90

47K

R91

22K

R92

1K

Q90

C3198GR

R63

430K

W2

60m/m

PRT-LED

A

1

1 2005.01.27MODEL NAME 7540a->7541aCL 1-50017A

2005.01.28

2005.01.28

2005.01.28

7541a

CLS-AP-40064

08

HCG

1

DIGITAL CO.LTD

CHUNG LAM

B+SW

(0.7x15):(0.7x4):(0.7x1):(0.7x1)

CASE GND CASE GND

16 15 14 13 12 11 10 9

87654321

12VB+

REM

Power Amplifier Reference 7541a

25

REF 7541a SCHEMATIC PAGE 1

HI-INPUT

HI101

LAD1140-04PBK

R105

47KF

C128

4.7/50V"SRE"

R241

1K

C241

2.2/50V

R231

1K

C2312.2/50V

R1425.6K

R141

1K

C141

2.2/50V

R132

5.6K

RCA101-A

DJB-554A

R122

10K

C211

47P

U111-A

1

3

2

NJM2068LD

+

-

VR101-A

20KB

R110

10K

U102-B

NJM2068M

75

6

4

R222

10K

U102-A8

3

21

NJM2068M

U105-B

7

6

5

NJM2068M

-

+

R115

5.6K

PROT

C228

4.7/50V"SRE"

U103-B

7

6

5

NJM2068M

-

+

R256 47KF

C132

100P

R257

5.1K

R255

9.1KF

R126

10KF

C256

39P

C155

10/16V"SRE"

U104-B

7

6

5

NJM2068M

-

+

VR101-B

20KB

R108

240F

R123

270K

C113

823M"TL"

R21410K

VEE2

R2135.6K

R156 91KF

C15622P

R155

9.1KF

R206

47KF

C25510/16V"SRE"

C215

823M"TL"

R205

47KF

R131

1K

C1312.2/50V

C102

22/16V"SRE"

U111-B

7

5

6

NJM2068LD

+

-

R225

10KF

R228

1KRCA101-D

DJB-554A

VEE

R229

100K

RCA101-B

DJB-554A

R127

1K

U101-B

7

6

5

NJM2068LD

-

+

R129

100K

RCA101-C

DJB-554A

R203

47KF

C204

10P

R201

22KF

R202

47KF

C203

22/16V"SREz"

C202

22/16V"SRE"

C181

100/16V

R28156K

R227

1K

C1202.2\50V

R112

10K

R208240FC201

10/16"SRE"

C123

22/16V"SRE"

C124

22/16V"SRE"

R207

1K

R21110K

R128

1K

VEE

VCC

VCC

C232

100P

TER02-A

DK0801-AG-5-UP

C224

22/16V"SRE"

R120

5.6KF

VR102A

50KC

C223

22/16V"SRE"

C121

68P

C220

2.2\50V

R107

1K

R106

47KF

R226

10KF

C221

68P

R124

270K

R221

22KF

VR102C

50KC

R121

22KF

R2205.6KF

R2472.7K

R224

270K

U101-A

1

2

3

NJM2068LD

-

+

R11110K

VR102D

50KC

C115

823M"TL"

R113

5.6K

R114

10K

R245

1K

R243

22

R244

22

R233

22

SW101-A

JSS2319

C111

47P

VR102B

50KC

SW101-B

JSS2319

R212

10K

C213

823M"TL"

VCC2

R242

5.6K

Q281

C3198GR

U104-A

1

2

3

NJM2068M

-

+

Q181

C3198GRR181

56K

Q151

C3200GR

C151

100PD1511SS133

R152

10K

C161104(M)

R161

4.7/0.5W

R151

1.5K

R171

33KF

C171

100/16V

R172

2KF

C291

220/16V

D291

1N4744(15V)

R291

150/2W

R160

0.1/3W

Q135

TIP35C

Q145

TIP36C

Q144

A1023Y

Q134

C1027Y

R150

120

R13647

R146

47

Q143

C3198GR

R137

3.9K

Q140

C3200GR

Q133A1266GR

D191

1N4744(15V)

C191

220/16VR191

150/2W

R135

1K

R134

22

R133

22

R144

22

R143

22

R1451K

U103-A

1

2

3

NJM2068M

-

+

R215

5.6K

U105-A

1

2

3

NJM2068M

-

+

R210

10K

R125

10KF

R147

2.7K

R223

270K

Q141

A1266GR

Q142

A1266GR

Q132

C3198GR

Q131

C3198GR

R262

680/2W

R162

680/2W

R170

0.1/3W

C242

100P

C142

100P

R234

22

R235

1K

Q231

C3198GR

Q232

C3198GR

Q242

A1266GR

Q241

A1266GR

Q233A1266GR

Q240

C3200GR

R2373.9K

Q243

C3198GR

R246

47

R236

47

R250

120

Q234

C1027Y

Q244

A1023Y

Q245

TIP36C

Q235

TIP35C

C206

22P

C271

100/16V

R272

1KF

R271

33KF

R251

1.5K

R261

4.7/0.5W

C261

104(M)

R252

10K

R232

5.6K

D251

1SS133C251100P

Q251

C3200GR

C240

473(M)

C140

473(M)

C192

330/16V

C292

330/16V

C400

104P

C200

104P

R103

47KF

C104

10P

R101

22KF

R102

47KF

C103

22/16V"SRE"

FRONT-R

REAR-R

U110-A

1

3

2

NJM2068LD

+

-

R166

1K

R165

1K

FRONT-R

FRONT-L

R266

1K

U110-B

7

6

5

NJM2068LD

-

+

R265

1K

REAR-L

FRONT-L

C205

22P

C106

22P

C105

22P

C126

22P

C226

22P

R270

0.1/3W

C225

10/16V"SRE"

C125

10/16V"SRE"

R2600.1/3W

SW102

JSS2219

C410

104P

C210

104P

C195

473P

C196

473P

C296

473P

C295

473P

CLIP

D169

1SS133

R169

200K

R269

200K

D269

1SS133

CLIP

C10110/16"SRE"

1

WT-9519->DK-0801-AG-5-UPC

3

2005.01.27MODEL NAME 7540a->7541aCL 1-50017A3

2004.08.10C101,201 102P->10/16V"SRE"CL 1-40240A2

2

2

R172,272 820F->1KF R171,271 13.7KF->33KF

R257 9.31KF->5.1KR108,208 820->240F R155,255 15K->9.1K

1

1

11

1

2004.06.29CL 1-40199B1

11

1

1

2005.01.28

2005.01.28

2005.01.28

7541a

CLS-AP-40064

09

HCG

DIGITAL CO.LTD

CHUNG LAM

2

+15V

-15V

+15V

STEREO

MONO

L-OUT

LOW INPUT L-CH

LOW INPUT R-CH

R-OUT

+15V

-15V

-15V

-15V

+15V

FLAT

FLAT

HPF

HPF

LPF

LPF

A

F/LOUT

F/ROUT

+

-

-

+

32-320Hz VARIABLE X-OVER


26


C461104(M)

R461

4.7/0.5W

R342

5.6K

C441

2.2/50V

R332

5.6K

R420

5.6KF

R320

5.6KF

C411

47P

R310

10K

U305-B

7

6

5

NJM2068M

-

+

R315

5.6K

R481

56K

PROT

C320

2.2\50V

SW301-B

JSS2319

U303-B

7

6

5

NJM2068M

-

+

U304-B

7

6

5

NJM2068M

-

+

C313

823M"TL"

R414

10K

SW301-A

JSS2319

R413

5.6K

TER02-B

DK-0801-AG-5-UP

C415

823M"TL"

C321

68P

C420

2.2\50V

C421

68P

R421

22KF

R321

22KF

R447

2.7K

R445

1K

R443

22

R444

22

R433

22

VEE

VEE R361

4.7/0.5W

R381

56K

Q351

C3200GR

C351

100PD3511SS133

R352

10K

R351

1.5K

R371

33KF

C371

100/16V

R372

1KF

C30110/16"SRE"

R360

0.1/3W

Q335TIP35C

Q345

TIP36C

Q344

A1023Y

Q334

C1027Y

R350120

R33647

R346

47

Q343

C3198GR

R337

3.9K

Q340C3200GR

Q333A1266GR

C3312.2/50V

R335

1K

R334

22

R333

22

R312

10K

R344

22

R343

22

R345

1K

R347

2.7K

Q341

A1266GR

Q342

A1266GR

Q332

C3198GR

Q331C3198GR

C442

100P

C342

100P

R434

22

R435

1K

Q431

C3198GR

Q432C3198GR

R370

0.1/3W

R442

5.6K

A

Q442

A1266GR

Q441

A1266GR

Q433

A1266GR

C432

100P

Q440

C3200GR

R4373.9K

Q443

C3198GR

R446

47

C340

473(M)

R331

1K

C440

473(M)

R462

680/2W

R362680/2W

R451

1.5K

R471

33KF

VCC

R472

1KF

C471

100/16V

C493

47P

Q435

TIP35C

Q445

TIP36C

Q444

A1023Y

Q434

C1027Y

C341

2.2/50V

C492

104(M)"TL"R441

1K

R450

120

U307-B

7

5

6

NJM2068M

+

-

Q451

C3200GR

R341

1K

R436

47

C325

10/16V"SRE"

VCCR431

1K

R496

6.8K

C4312.2/50V

C305

22P

R493

39K

C451

100P

R497

150K

D451

1SS133

C361

104(M)

R452

10K

VR303-A20KB

C332

100P

R432

5.6K

C306

22P

R492

1K

R4911K

R41110K

C405

22P

VR302A

50KC

C393

47P

R465

1K

C392

104(M)"TL"

U310-B

7

6

5

NJM2068LD

-

+

U306-B

7

5

6

NJM2068M

+

-

R396

6.8K

R393

39K

R466

1K

REAR-L

VR302C

50KC

REAR-R

R365

1K

R397

150K

R366

1K

U310-A

1

3

2

NJM2068LD

+

-

C303

22/16V"SRE"

R302

47KF

R301

22KF

VR303-B20KB

C304

10P

R303

47KF

C406

22P

R31110K

VR302D

50KC

R423

270K

U301-A

1

2

3

NJM2068LD

-

+

R424

270K

R324

270K

R470

0.1/3W

R392

1K

R306

47KF

R307

1K

C315

823M"TL"

C423

22/16V"SRE"

R3911K

R313

5.6K

R314

10K

C311

47P

C424

22/16V"SRE"

VR302B

50KC

C491

104(M)"TL"

R412

10K

U307-A

1

3

2

NJM2068M

+

-

U306-A

1

3

2

NJM2068M

+

-

C413

823M"RL"

U304-A

1

2

3

NJM2068M

-

+

R407

1K U303-A

1

2

3

NJM2068M

-

+

R415

5.6K

C324

22/16V"SRE"

U305-A

1

2

3

NJM2068M

-

+

C323

22/16V"SRE"

R410

10K

C391

104(M)"TL"

R369

200K

R460

0.1/3W

R408240F

C402

22/16V"SRE"

C403

22/16V"SRE"

R402

47KF

R401

22KF

C404

10P

R403

47KF U301-B

7

6

5

NJM2068LD

-

+

C40110/16"SRE"

RCA301-B

DJB-562D

C302

22/16V"SRE"

R405

47KF

C45510/16V"SRE"

R406

47KF

R355

9.1KF

C356 22P

R356 91KF

R323

270K

R308

240F

VR301-B

20KB

C355

10/16V"SRE"

C456

39P

R455

9.1KFR457

5.1K

R456 47KF

U302-A8

3

21

NJM2068M

R422

10K

U302-B

NJM2068M

75

6

4

VR301-A

20KB

R322

10K

RCA301-A

DJB-562D

R305

47KF

HI-INPUT

HI301LAD1140-04PBK

C425

10/16V"SRE"

SW302

JSS2219

CLIP

CLIP

D369

1SS133

C495

473P

C496

473P

C396

473P

C395

473P

D469

1SS133

R469

200K

C

3

2005.01.27MODEL NAME 7540a->7541aCL 1-50017A3

1

WT-9519->DK-0801-AG-5-UP

2004.08.10C301,401 102P->10/16V"SRE"CL 1-40240A2

2

2

R457 9.31KF->5.1KR308,408 820->240F R355,455 15KF->9.1KFR372,472 820F->1KF R371,471 13.7KF->33KF

1

1

11

1

2004.06.29CL 1-40199B1

11

11

2005.01.28

2005.01.28

2005.01.28

7541a

CLS-AP-40064

10

HCG

3

DIGITAL CO.LTD

CHUNG LAM

+15V

-15V

+15V

STEREO

MONO

LOW INPUT L-CH

LOW INPUT R-CH

-15V

-15V

+15V

-15V

+15V

FLAT

FLAT

HPF

HPF

LPF

LPF

R/LOUT

R/ROUT

+

-

-

+

50Hz 0~12dB BASSBOOST32-320Hz VARIABLE X-OVER


27


71 2 3 4 5 6 8

A

B

C

D

E


28

REF7541a_sm

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Transcript of REF7541a_sm