Panasonic SA-AKX74PH Manuale utente

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of law.

PSG1207012SE

CD Stereo System

Model No. SA-AKX74PH

SA-AKX74PN

SA-AKX94PH

SA-AKX74PR

SA-AKX94PR

Product Color: (K)...Black Type

Subject : Updates on Block Diagram, Schematic Diagram, Printed Circuit Board,

Exploded View & Parts List.

TABLE OF CONTENTS PAGE PAGE

1Notes----------------------------------------------------------------- 2

2 Block Diagram (Updates) -------------------------------------- 3

2.1. Power Supply (SA-AKX74PH/PN-K) ----------------- 3

2.2. Power Supply (SA-AKX94PH-K) ---------------------- 4

3 Schematic Diagram (Updates) ------------------------------- 5

3.1. Main(MICON) Circuit (SA-AKX74PH/PN-K)-------- 5

3.2. Panel Circuit (SA-AKX74PH/PN-K)------------------- 8

3.3. CD Interface, Mic and Voltage Selector Circuit

(SA-AKX74PH/PN-K)------------------------------------- 9

3.4. D-Amp Circuit (SA-AKX74PH/PN-K) ----------------10

3.5. SMPS Circuit (SA-AKX74PH/PN-K)-----------------11

3.6. CD Interface, Mic and Voltage Selector Circuit

(SA-AKX94PH-K)-----------------------------------------13

3.7. SMPS Circuit (SA-AKX94PH-K)----------------------14

4 Printed Circuit Board (Updates)----------------------------16

4.1. Panel, Remote Sensor, USB and Music Port

P.C.B. (SA-AKX74PH/PN-K)---------------------------16

4.2. SMPS and D-Amp P.C.B. (SA-AKX74PH/PN-

K)-------------------------------------------------------------17

5 Exploded View (Updates)-------------------------------------18

5.1. Packaging (SA-AKX74PH/PN-K) -------------------- 18

5.2. Packaging (SA-AKX94PH-K) ------------------------- 19

6 Electrical & Mechanical Replacement Parts List

(Updates) ----------------------------------------------------------21

Please file and use this supplement manual together with the service manual for

Model No. SA-AKX74PH/PN-K Order No. PSG1203050CE

Model No. SA-AKX94PH-K Order No. PSG1203051CE

Model No. SA-AKX74/94PR-K Order No. PSG1204034AE

1Notes

Background:

• For improvement of quality and performance.

This supplement includes revised contents to the original service manual for below sections:-

1. Block Diagram

2. Schematic Diagram.

3. Printed Circuit Board.

4. Exploded View.

5. Electrical & Mechanical Replacement Parts List.

2 Block Diagram (Updates)

2.1. Power Supply (SA-AKX74PH/PN-K)

With reference to original service manual (section 14.4) on pages 77.

SA-AKX74PH/PN POWER SUPPLY (1/2) BLOCK DIAGRAM

TO POWER SUPPLY

BLOCK (2/2)

NOTE: “ * ” REF IS FOR INDICATION ONLY

AC INLET

P5701

DZ5701

5,65,6 CN2007CN5802

77 CN2007CN5802

+35V SENSE +35V SENSE

+35V SENSE

88 CN2007CN5802

SYS3.3V SYS3.3V

PW +16V

PW +5V

DC DET PWR

SYS3.3V

SWITCHING MODE POWER

SUPPLY CONTROL

MIP2F20MSSCF

IC5799

SHUNT

REGULATOR

C0DAZYY00039

IC5801

SUB

TRANSFORMER

T5751

MAIN

TRANSFORMER

T5701

TH5702

TH5860

TH5861

D5701

D5896

D5798

D5793

D5702

D5730

D5795

D5725

D5731

D5729

D5726

D5802

D5803

D5804

-35V SENSE

D5801

D5724,D5727

QR5802

DC DETECT

Q5860,Q5861,Q5862

TRANSFORMER

TEMPERATURE

DETECT

FEEDBACK

CIRCUIT

SYNC

Q5898

SYNC SWITCH

QR5810

PCONT

SWITCH

QR5801

SWITCH

Q2035

BEATPROOF

CIRCUIT

Q5721

SWITCH

Q5722

CURRENT

LIMITING

SWITCH

PC5799

FEEDBACK

PC5701

FEEDBACK

PC5702

SYNC

PC5720

FEEDBACK

SWITCHING

REGULATOR

C5HACYY00004...PN

C5HACYY00005...PH

IC5701

VCC

OCP/BD

35V

SYNC SYNC

DCDET2 DC DET PWR

+35V SENSE

-35V SENSE

DC16V

PCONT PCONT

SYNC

1,21,2 CN2007CN5802 -35V SENSE

-35V SENSE

5,65,6 ZJ5000*ZJ2001*

+35V SENSE +35V SENSE

-35V SENSE 1,21,2 ZJ5000*ZJ2001* -35V SENSE

TEMP DET 99 CN2007CN5802 TEMP DET

-35V

TEMP DET TEMP DET

IC5899

SHUNT

REGULATOR

C0DAZYY00039

C0DAEYY00040

DC DET PWR

PCONT

SMPS BP

FROM/TO

SERVO & SYSTEM CONTROL

FROM/TO

SERVO & SYSTEM CONTROL

1414 CN2007CN5802

PCONT

1010 CN2007CN5802

DCDET2

1313 CN2007CN5802

BLKBLK TL7*TL5*

REDRED TL8*TL6*

DC16V

VOLT ADJ

S5701

L5701

FOR PH

FOR PH FOR PN

SMPS P.C.B.

VOLTAGE SELECTOR P.C.B.

MAIN P.C.B.

FB 2

VDD 1

VCC 4

CL 3

KC RR

Q5720

VOLTAGE

REGULATOR

D5721

D5722

D5728

D5723

SECONDARYPRIMARY

ECO CTL

Q5899,QR5811,QR5812

ECO CTLECO CTL ECO CTL

1111 CN2007CN5802

+5V+5V 82 CN2011CN5902

5,65,6 ZJ5901*CN5801 +35V SENSE

1,21,2 ZJ5901*CN5801 -35V SENSE

35V

+35V SENSE

-35V SENSE -35V

+5V 5V

D-AMP P.C.B.

CHANGE

(IC5899)

2.2. Power Supply (SA-AKX94PH-K)

With reference to original service manual (section 14.4) on pages 81.

SA-AKX94PH POWER SUPPLY (1/2) BLOCK DIAGRAM

TO POWER SUPPLY

BLOCK (2/2)

NOTE: “ * ” REF IS FOR INDICATION ONLY

AC INLET

P5701

DZ5701

5,65,6 CN2007CN5802

77 CN2007CN5802

+35V SENSE +35V SENSE

5,65,6 ZJ5500*CN5801

+35V SENSE +35V SENSE

88 CN2007CN5802

SYS3.3V SYS3.3V

PW +16V

DC DET PWR

SYS3.3V

SWITCHING MODE POWER

SUPPLY CONTROL

MIP2F20MSSCF

IC5799

SHUNT

REGULATOR

C0DAZYY00039

IC5801

SUB

TRANSFORMER

T5751

MAIN

TRANSFORMER

T5701

TH5860

TH5861

D5701

D5896

D5798

D5793

D5702

D5730

D5795

D5725

D5731

D5729

D5726

D5802

D5803

D5804

-35V SENSE

D5801

D5724,D5727

QR5802

DC DETECT

Q5860,Q5861,Q5862

TRANSFORMER

TEMPERATURE

DETECT

FEEDBACK

CIRCUIT

SYNC

Q5898

SYNC SWITCH

Q5700

SWITCH

QR5810

PCONT

SWITCH

QR5801

SWITCH

Q2035

BEATPROOF

CIRCUIT

Q5721

SWITCH

Q5722

CURRENT

LIMITING

SWITCH

PC5799

FEEDBACK

PC5701

FEEDBACK

PC5702

SYNC

PC5720

FEEDBACK

SWITCHING

REGULATOR

C1ZBZ0004646

IC5701

VCC

OCP/BD

DRIVE

35V

SYNC SYNC

DCDET2 DC DET PWR

+35V SENSE

-35V SENSE

DC16V

PCONT PCONT

SYNC

1,21,2 CN2007CN5802 -35V SENSE

-35V SENSE 1,21,2 ZJ5500*CN5801 -35V SENSE

5,65,6 ZJ5000*ZJ2001*

+35V SENSE +35V SENSE

-35V SENSE 1,21,2 ZJ5000*ZJ2001* -35V SENSE

TEMP DET 99 CN2007CN5802 TEMP DET

-35V

35V

+35V SENSE

-35V SENSE -35V

TEMP DET TEMP DET

IC5899

SHUNT

REGULATOR

C0DAZYY00039

C0DAEYY00040

DC DET PWR

PCONT

SMPS BP

FROM/TO

SERVO & SYSTEM CONTROL

FROM

SERVO & SYSTEM CONTROL

1414 CN2007CN5802

PCONT

1010 CN2007CN5802

DCDET2

1313 CN2007CN5802

BLKBLK TL7*TL5*

REDRED TL8*TL6*

DC16V

VOLT ADJ

S5701

L5701

SMPS P.C.B.

VOLTAGE SELECTOR P.C.B.

MAIN P.C.B.

FB 2

VDD 1

VCC 4

CL 3

KC RR

Q5720

VOLTAGE

REGULATOR

D5721

D5722

D5728

D5723

SECONDARYPRIMARY

D-AMP P.C.B.

CHANGE

(IC5899)

3 Schematic Diagram (Updates)

3.1. Main(MICON) Circuit (SA-AKX74PH/PN-K)

With reference to original service manual (section 16.3) on pages 87, 91 & 96.

12 3 4 5 6 7 8 9 10 11 12 13 14

BMAIN(MICON) CIRCUIT

SCHEMATIC DIAGRAM - 5

TO MAIN(MICON)

CIRCUIT (2/10)

TO MAIN(MICON)

CIRCUIT (6/10)

MI: MAIN(MICON): SCHEMATIC DIAGRAM - 5 ~ 14

DA: MAIN(D-AMP): SCHEMATIC DIAGRAM - 15 ~ 16

: AUX/TUNER/MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE

: CD AUDIO INPUT SIGNAL LINE : AUDIO OUTPUT SIGNAL LINE

: +B SIGNAL LINE

: -B SIGNAL LINE : USB SIGNAL LINE

: AM SIGNAL LINE

: FM SIGNAL LINE

SA-AKX74PH/PN MAIN(MICON) CIRCUIT

3/10 5/10

8/10

2/10

7/10

4/10

9/10 10/10

1/10

6/10

R2056 4.7K

C2072 3300P

C2073 C2074

R2051 1K R2162 0

C2067

C2070 0.47

0.01

C2068

3300P

0.47C2071

R2054

R2057 4.7K

R2052 1K R2193 0

R2060 6.8K

R2059 4.7K

C2083 0.022 3300P

C2082

C2077

C2079 R2058 4.7K

C2076

C2078

C2153

C2081 C2080

0.01

0.018

0.47

R2372

C2192

R2373

150K B1ABCF000231

Q2001

R2064

15K

B1ABCF000176

Q2040

R2061

6.8K

R2355

12K

C2084 C2088

0.082 0.082

150KR2062

R2063

15K

10K

50V3.3C2086

R2356

B1ABCF000176

Q2037

C2087

4.7

C2085 50V3.3

C2075 0.01

0.018

0.47

0.01

R2374

1C2033

C2034

C2028 1

C2032 1

1000P

C2024

1000P

C2026

15K

R2152

15K

R2154

680

R2103 10C2021

C2031 1

C2020

R2012 680

C2029 1

C2054

1000P

C2053

1000P

C2043

1000P 100P

C2049

C2046

1000P 100P

C2050

C2057 50V4.7

10V33C2056

C2193

38 3536 3032 31 2729 2834 333739

61423 5

89711 1210 13

IC2000

C1AB00003256

ASP

R2375

150K

B1ABCF000176

Q2041

C2066

50V1

C2061

R2294

6.8K

R2295

6.8K

AUX_L

TUNER_R

RCH_IN

TUNER_L

AUX_R

C2089 50V3.3

R2078 56K

R2077

C2242

0.1 C2093

16V1000

CLIP_ATTN

R2079 33

C2090 50V1

C2092

0.068

ASP_DATA

ASP_CLK

CD_L

CD_R

DAGND

PW_+9V

AGND

100

R2246

Q2042

B1ABCF000176 R2377

1K SYS3.3V

BASS_SHIFT

RIGHT-OUT

LEFT-OUT

PW_+9V_1

MPORT_R

MPORT_L

SWITCH

LCH_IN

[26] SURTC

[14] BPF2

[15] BPF3

VOL2CAPA

GND

TONEB1B

TONEB2B

SRFIL

TONEM1B

TONEM2B

SDA

V+

SCL

OUTB

VOL2CAPB

EXTSENSE

INT

TONEB1A

TONEM1A

TONEM2A

TONEB2A

BPF1

OUTA

IN3B

[39] NC

IN1B

IN2B

RECOUTB

MONOUTB

IN2A

IN1A

IN3A

[1] NC

IN5A

RECOUTA

MONOUTA

IN6B

VREF

IN6DIFF

IN5B

IN6A

IN4A

IN4B

VOLINA VOLINB

TONEHBTONEHA

MIC_GND

R2426

68K

C2055 C2060

47P 100P

675

243

V+

V-

IC2002

C2059 C2064

47 100

R2043 R2045

22K 22K

R2427

68K

C2048

50V1

C2047

50V1 R2039

22K R2044

22K

C0ABBB000067

BUFFER AMP

R2032

47K

R2029

47K

C2241

0.1

C2041

6.3V100

R2024

3.9K

R2025

3.9K

R2030

47K

R2031

47K

MIC C2037

0.047

R2050

22K

R2053

22K

R2129

(R2063)

CHANGE

57 58 59 60 61 62 63 64 65 66 67 68 69 70

: AUX/TUNER/MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE

: CD AUDIO INPUT SIGNAL LINE : AUDIO OUTPUT SIGNAL LINE

: +B SIGNAL LINE

: -B SIGNAL LINE : USB SIGNAL LINE

: AM SIGNAL LINE

: FM SIGNAL LINE

TO MAIN(MICON)

CIRCUIT (4/10)

MI: MAIN(MICON): SCHEMATIC DIAGRAM - 5 ~ 14

DA: MAIN(D-AMP): SCHEMATIC DIAGRAM - 15 ~ 16

TO MAIN(MICON)

CIRCUIT (10/10)

BMAIN(MICON) CIRCUIT

SCHEMATIC DIAGRAM - 9

10/10 MAIN(MICON) CIRCUIT

SA-AKX74PH/PN

3/10 5/10

8/10

2/10

7/10

4/10

9/10

1/10

6/10

D-AMP CIRCUIT

(CN5902)

IN SCHEMATIC

DIAGRAM - 21

SW_MUTE R2133

0B1GDCFJJ0047

MUTING CONTROL

Q2006

C2119

6.3V220

UP_DGND

C2238

2.2

CN2011

DC_DET_AMP

MODE_DA

MUTE_F

PW_+5V

GND +5V

AGND

FHOP

MOD_DA

+5V GND

DC_DET

SUBWOOFER

SIGNAL AGND

MUTE F

F_HOP

AGND

R2125

SW_LV2

Q2005

B1GDCFJJ0047

BUFFER

R2111

47K

C2113

50V1

C2109

SW_LV1

R2110

R2089

10K

C2111

10M

0.01

Q2004

B1GDCFJJ0047

BUFFER

R2119

C2112

R2145

10K

R2147

C2125 C2131

1 0.01 R2151

18K

R2148

R2149

470

Q2008

B1ABCF000176

MUTING

R2179

12K

R2180

100K

Q2010

B1ABCF000176

SW LEVEL CONTROL

R2167

2.2K

Q2009

B1ABCF000176

SW LEVEL CONTROL

R2132

R2131

C2118

10K

47P 1K

0.56

R2124

100P 27K

15K C2122 15K

C2124

675

V-

V+

IC2004

C0ABBB000067

DUAL OP-AMP

(R2124)

CHANGE

57 58 59 60 61 62 63 64 65 66 67 68 69 70

: AUX/TUNER/MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE

: CD AUDIO INPUT SIGNAL LINE : AUDIO OUTPUT SIGNAL LINE

: +B SIGNAL LINE

: -B SIGNAL LINE : USB SIGNAL LINE

: AM SIGNAL LINE

: FM SIGNAL LINE

TO MAIN(MICON)

CIRCUIT (9/10)

10/10 SA-AKX74PH/PN MAIN(MICON) CIRCUIT

3/10 5/10

8/10

2/10

7/10

4/10

9/10

1/10

6/10

BMAIN(MICON) CIRCUIT

SCHEMATIC DIAGRAM - 14

TO MAIN(MICON)

CIRCUIT (5/10)

MI: MAIN(MICON): SCHEMATIC DIAGRAM - 5 ~ 14

DA: MAIN(D-AMP): SCHEMATIC DIAGRAM - 15 ~ 16

1.8K

R2320

18K

27K

R2321

18K

R2292

10K

0.068

C2204 R2290

4.7K

R2293

10K

C2213

1.8K

R2305

R2308

0.068

C2205 R2291

4.7K

C2212

R2264

R2265 10K

C2186

R2257

12K

C2185

C2183

R2254

C2181

R2258 6800P

0.68

10K

15K

675

243

IC2001

R2259

C2184

R2255

C2182

15K

6800P

0.68

R2256 12K

R2267

10 6.8K

R2270

39K

C2180

R2272 2.7K

0.1C2189

2.7KR2268

C2179 10

R2266

6.8K

R2269

39K

C2107

R2225

0C2108

R2224

Q2029

B1ABCF000176

BUFFER AMP

R2244

4.7K

R2245

4.7K R2242

27K C2166

0.056

Q2032

B1ABCF000176

BUFFER AMP

R2241

27K

R2238

1.8K

R2239

1.8K C2169

0.15

C2165

0.056

C2168

0.15

R2434

C2200

25V220

R2435

1.8K

R2048

R2436

4.7K

27K

C2280

C2282

0.056

R2439

27K

C2279

0.056

0.15

R2440

1.8K

C2281

0.15

R2438

4.7K

Q2030

B1ABCF000176

BUFFER AMP

Q2028

B1ABCF000176

BUFFER AMP

16V220C2190

C0ABBB000067

DUAL OP-AMP

GND

V+

FR_R_WOOFER DA

FR_R_TWEETER DA

FR_L_WOOFER DA

FR_L_TWEETER DA

CHANGE

(R2320,R2321)

3.2. Panel Circuit (SA-AKX74PH/PN-K)

With reference to original service manual (section 16.5) on pages 99.

12 3 4 5 6 7 8 9 10 11 12 13 14

1 2 3 4 5 6 7 8 9 10 11 12 13 14

PANEL CIRCUIT

SCHEMATIC DIAGRAM - 17

SA-AKX74PH/PN PANEL CIRCUIT

2/21/2

TO PANEL

CIRCUIT (2/2)

REMOTE SENSOR

CIRCUIT (CN6200)

IN SCHEMATIC

DIAGRAM - 19

: -B SIGNAL LINE

: +B SIGNAL LINE

: MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE : AUDIO OUTPUT SIGNAL LINE

123 123

D6010

B0BC035A0007

B0EAMM000057

D6007

R6038

5.6K

Q6003

B1BAAL000018

POWER SAVE CONTROL

C6024

3300P

R6049

47K

R6039

L6000

J0JBC0000019

-VP

B0EAMM000057

D6005 D6008

DZ2J24000L

C6028

50V47

GR1

SG1

PW_CD3.3V

GR11

GR12

SG2

SG3

C6021 0.01

GR2

GR3

GR8

GR9

GR3

GR2

GR6

GR4

GR5

GR1

GR7

C6010 330P

330P

C6013 330P

C6012

R6033 82K

GR10

GR11

GR12

GR8

GR9

GR3

GR2

GR6

GR4

GR5

GR1

F+

GR7

GR10

R6047

C6029

16V100 R6053

R6051

D6009

B0BC2R4A0006

T6000

G4DYA0000214

SWITCHING TRANSFORMER

B0JAME000114

D6006

SG7

SG6

SG12

SG10

SG11

SG16

SG13

SG15

SG14

SG8

SG9

SG4

SG1

SG3

SG2

SG5

SG7

SG6

SG12

SG10

SG11

SG16

SG13

SG15

SG14

SG8

SG9

SG4

SG1

F-

SG3

SG2

SG5

C6031

0.1

22K

R6054

C6032

50V22

C6023

50V47

GR6

GR5

GR8

GR9

GR7

SG6

SG5

SG9

SG7

SG8

GR4

SG4

SG14

GR12

SG15

SG16

SG11

SG10

SG13

SG12

GR10

GR11

16 17

12 151413 18 20

35374244 43 39 3841 40 36

C0HBB0000057

FL DISPLAY DRIVER

IC6000

C6003

0.1

220R6031

R6029 220

FL_CLK

FL_CS

FL_DA

435234 618 39353127 2825 26 3029 3432 33 3836 37 4240 411312 15 161491110 23 2418 1917 21 22207 44

A2BB00000184

FL DISPLAY

FL6000

R6030 470

FL_GND

PW_+18V

S13

S12

CLK

STB

P1 G11

P3 S16

VEE

S14

S15

G12/S17P2

OSC

DIN

[12] VSS

[22] S9

VDD

S10

S11

[33] G10

[44] VSS

VDD

1000P

C6004

C6005

C6007

C6008

C6009

C6011

C6014

C6016

C6018

C6019

C6020

C6022

VR6001

K9AA012Y0004

VOL_JOGB

ROT_JOGA

C6027

100P

10K

R6048

10K

R6041

C6026

100P

RMT

ROT_JOGB

10K

R6050

100P

C6030

PW_SYS3.3V

DGND

EVEKE2F3524B

VR6000

VOL_JOGA

R6040

10K

C6025

100P

CN6001

VREF+

ALBUM/TRACK

DGND

VOLUME

RMT

DELETE

(D6011)

ADD

(D6007)

3.3. CD Interface, Mic and Voltage Selector Circuit (SA-AKX74PH/PN-K)

With reference to original service manual (section 16.7) on pages 102.

12 3 4 5 6 7 8 9 10 11 12 13 14

1 2 3 4 5 6 7 8 9 10 11 12 13 14

HCD INTERFACE CIRCUIT

SCHEMATIC DIAGRAM - 20

SA-AKX74PH/PN CD INTERFACE / MIC / VOLTAGE SELECTOR CIRCUIT

NVOLTAGE SELECTOR CIRCUIT

SMPS CIRCUIT

IN SCHEMATIC

DIAGRAM - 23

CD SERVO CIRCUIT

(FP8251)

IN SCHEMATIC

DIAGRAM - 4

TO LOADING P.C.B.

(CD MECHANISM UNIT BRS11C)

NOTE: “ * ” REF IS FOR INDICATION ONLY

KMIC CIRCUIT : +B SIGNAL LINE : MIC AUDIO INPUT SIGNAL LINE

PANEL CIRCUIT

(ZJ6003*)

IN SCHEMATIC

DIAGRAM - 18

MUSIC PORT

CIRCUIT (ZJ6402*)

IN SCHEMATIC

DIAGRAM - 19

FOR PH

(BLK)

TL5*

TL6*

(RED)

S5701

VOLT ADJ

CN7001

M7301*

CN7002

S7201

RESET

M7302*

DGND

OPEN_SW

SPM+

SPM-

LDM+

CLOSE_SW

TRV+

LDM-

LDM+

OPEN_SW

DGND

REST_SW

TRV-

LDM-

CLOSE_SW

SPINDLE

MOTOR

TRAVERSE

MOTOR

ZJ6501*

+9V

MIC

MIC_SW

MIC_GND

CHASSIS_GND

ZJ6500*

231

VR6500

EVUF2AF15B14

MIC VOLUME

JK6500

MIC

C6516

0.01

C6517

0.01

C6515

1000P

C6505 16V10

C6513

50V0.1

C6509 50V1

564 123

91113141210

VREF

INT

V+

GND

GAIN1

OUT

BUFFOUT

BUFFGAIN

BUFFIN

SENSE

GAIN SW

C6503

47P

50V4.7

C6507C6504

50V0.1

C6514

50V2.2

2200P

1000P

C6511

C6510

50V1

C6500

50V4.7

LB6500

DET

GAIN2

C6506

4700P

R6506

560

R6507

680 L6500

L6502

0J0JBC0000019

100KR6502

R6504

15K

33K R6505

330

R6500

100

R6503

4.7K

IC6500

C1AB00003130

MIC AMPLIFIER

C6502 16V10

R6501 6.8K

CHANGE

(C6511,R6504)

3.4. D-Amp Circuit (SA-AKX74PH/PN-K)

With reference to original service manual (section 16.8) on pages 103.

12 3 4 5 6 7 8 9 10 11 12 13 14

1 2 3 4 5 6 7 8 9 10 11 12 13 14

LD-AMP CIRCUIT

SCHEMATIC DIAGRAM - 21

SA-AKX74PH/PN D-AMP CIRCUIT

: AUDIO OUTPUT SIGNAL LINE

: -B SIGNAL LINE

: +B SIGNAL LINE

TO SPEAKER

(SUBWOOFER)

MAIN(MICON)

CIRCUIT (CN2011)

IN SCHEMATIC

DIAGRAM - 9

SMPS CIRCUIT

(CN5801)

IN SCHEMATIC

DIAGRAM - 22

R5940 100K

R5918

2.7K

R5913

2.7K

C5933

0.015 TH5900

D4CC11040013

R5926

100

0.47

C5941

220P

C5934

C5932 0.1

C5937

0.1

C5936

220P

C5935R5922

C5930 0.47

0.1

C5931

R5924

5.6K

C5938

0.1 C5939

0.1

C5947

1000P

C5955 0.1

C5954 0.1

5.6K

R5933

0.68

C5949

D5906

B0EAKM000117

D5905

B0EAKM000117

R5932

22 5.6K

R5934

0.1

C5951

1SWL-

-G2

SWL+

JK5901

B0EAKM000117

D5904

B0EAKM000117

D5903

C5950

0.1

R5931

C5948

0.68

G0A150L00003

L5903

C5942

1000P C5946

16V10

C5944

0.47

C5943

330P

R5925

5.6K

19 21 23222010218974563121514 17 18161311

C1BA00000497

AUDIO DIGITAL AMPLIFIER

IC5900

R5921

C5925

C5926 0.1

0.1

C5917

1000P

C5920

100V22

R5917

C5915

0.47

C5919

220P

C5929

220P

C5927

C5918

330P

R5914

5.6K

R5911

5.6K

C5928

0.015

C5921

0.1 C5924

33P

C5923

0.1

R5923

6.8K

R5928

82K

Q5905

B1ABCF000176

SWITCH

B1ABCF000176

Q5906

R5915

10K

82K

R5927

10V100

C5945

B1ABCF000176

SPEAKER PROTECTION SWITCH

Q5907

R5901

120K

B1GBCFJJ0051

FREQUENCY HOPPING

QR5900

R5935

10K

R5904

10K

R5905

C5956

C5901

1000P

CN5902

0.1

C5904

0.1

C5903

ZJ5901*

B1GDCFJJ0047

+5V POWER SUPPLY

QR5901

L5902

J0JKB0000020

50V220

C5908

C5909

0.1

C5910

0.1

50V220

C5907

L5901

J0JKB0000020

C5905

0.1

C5906

B1ADCE000012

+5V VOLTAGE SUPPLY SWITCH

Q5902

R5910

1.5K

R5909

33K

R5906

180K

Q5901

B1ABGC000005

SWITCH

R5907

27K

R5903

10K

R5908

10K

Q5903

B1ABCF000176

MODE SWITCH

MODE

IN2+

VSSP2

PROT

OUT1

VDDP1

BOOT1

SGND1

VDDA1

VSSA1

OSC

STABI

VSSP1

VSSD

OUT2

SGND2

VSSA2

VDDA2

BOOT2

VDDP2

IN1-

IN1+

IN2-

SYS_GND

+35V_SENSE

-35V_SENSE

SYS_GND

-35V_SENSE

+5V

MOD_DA

+5V GND

SIGNAL AGND

SUBWOOFER

MUTE_F

DC_DET

FHOP

AGND

NOTE: “ * ” REF IS FOR INDICATION ONLY

G2G1

HEATSINK*

321

ZJ5900*

R5929...AKX74

ADD

(R5929)

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