Pioneer GM-520-T Service manual

ORDER NO.

CRT3519

GM-520T/XU/UC

BRIDGEABLE TWO-CHANNEL POWER AMPLIFIER

GM-520T

/XU/UC

For details, refer to "Important Check Points for Good Servicing".

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2005

K-ZZA. AUG. 2005 Printed in Japan

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SAFETY INFORMATION

CAUTION

A

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you
are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the
repair to a qualified service technician.

WARNING

This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California

B

to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65

- Service Precaution

You should conform to the regulations governing the product (safety, radio and noise, and other regulations),
and should keep the safety during servicing by following the safety instructions described in this manual.

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[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.

1. Product safety

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

0 Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

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2. Adjustments

To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.

4. Cleaning

For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

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CONTENTS

SAFETY INFORMATION ..................................................................................................................................... 2

1. SPECIFICATIONS ............................................................................................................................................ 5

2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6

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2.1 PACKING ................................................................................................................................................... 6

2.2 EXTERIOR................................................................................................................................................. 8

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ..........................................................................................10

3.1 SCHEMATIC DIAGRAM(GUIDE PAGE) .................................................................................................. 10

4. PCB CONNECTION DIAGRAM ..................................................................................................................... 16

4.1 AMP UNIT................................................................................................................................................ 16

5. ELECTRICAL PARTS LIST ............................................................................................................................ 20

6. ADJUSTMENT ............................................................................................................................................... 24

7. GENERAL INFORMATION............................................................................................................................. 25

7.1 DIAGNOSIS ............................................................................................................................................. 25

7.1.1 DISASSEMBLY ..................................................................................................................................... 25

7.1.2 CONNECTOR FUNCTION DESCRIPTION.......................................................................................... 26

8. OPERATIONS ................................................................................................................................................ 27

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1. SPECIFICATIONS

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2. EXPLODED VIEWS AND PARTS LIST

OTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List.

• The > mark found on some component parts indicates the importance of the safety factor of the part.

A

Therefore, when replacing, be sure to use parts of identical designation.

• Screw adjacent to mark on the product are used for disassembly.

• For the applying amount of lubricants or glue, follow the instructions in this manual.
(In the case of no amount instructions,apply as you think it appropriate.)

2.1 PACKING

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"

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1

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2

6

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PACKING SECTION PARTS LIST

Mark No. Description Part No.

1 Screw Assy CEA5330

2 Screw BYC40P180FTB

* 3 Polyethylene Sheet CNM4338

4 Cord Assy CDE7736

5 Protector CHP3066

6 Polyethylene Bag CEG1351

Owner's Manual

Part No. Language

CRD4010 English, French, Spanish

Mark No. Description Part No.

7 Carton CHG5587

8 Contain Box CHL5587

9-1 Polyethylene Bag CEG1116

9-2 Owner's Manual CRD4010

* 9-3 Card ARY1048

* 9-4 Caution Card CRP1324

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2.2 EXTERIOR

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B

C

D

3

3

29

27

29

2

15

37

9

13

24

22

23

17

2

21

25

2

2

16

4

11

1

10

10

12

2

30

14

19

18

2

2

28

13

29

A

13

13

13

13

26

13

13

2

8

13

10

20

13

2

13

20

13

20

33

36

35

38

10

34

13

13

13

29

31

2

E

6

1

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8

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1

1

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32

1

1

>

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EXTERIOR SECTION PARTS LIST

Mark No. Description Part No.

1 Screw(M3x8) CBA2011

2 Screw(M3x12) CBA2012

3 Screw BSZ30P050FTB

* 4 Badge CAH1946

5 •••••

6 Case CNB3199

7 Panel CNB3202

8 Panel CNB3206

9 Heat Sink CNR1828

10 Spacer CNV8256

A

11 Lighting Conductor CNV8692

12 Amp Unit CWH1287

13 Screw(M3x8) CBA2011

14 Pin Jack (CN111) CKB1068

15 Terminal (CN853) CKE1055

16 Terminal (CN855) CKE1057

17 Terminal (CN856) CKE1057

18 Socket (CN801) CKM1463

19 Holder CND2456

20 Terminal CND2458

21 Buss Bar CND2467

22 Buss Bar CND2468

23 Buss Bar CND2469

24 Buss Bar CND2470

25 Buss Bar CND2472

26 Buss Bar CND2729

27 Sub Heat Sink CNR1808

28 Sub Heat Sink CNR1810

29 Screw PPZ30P100FSN

30 Screw PPZ30P100FTB

31 Terminal (CN850) VNF1084

32 Screw PPZ30P100FTB

33 Fuse (FU100, FU101) (30A) CEK1330

34 Screw BMZ40P200FTB

* 35 Seal CAN3984

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C

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36 Holder CNV8522

37 Nut NB40FTB

38 Washer WB40FTB

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3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 SCHEMATIC DIAGRAM(GUIDE PAGE)

A

Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or
"ELECTRICAL PARTS LIST".

A-a

0dB

Decimal points for resistor
and capacitor fixed values
are expressed as :

←

2.2 2R2

←

0.022 R022

0dB

The > mark found on some component parts indicates
the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of
identical designation.

-1.7dB ~

-32.1dB

0dB or +12dB or +6dB

A-a A-b

A-a

A-b

A-a

A-b

Large size

SCH diagram

Guide page

Detailed page

NOTE :

Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.

Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.

0dB

B

+18.5dBs
(BB ON
INPUT MAX)

+18.3dBs

+18.3dBs

-13.8dBs

GAIN

BASS BOOST

-1.8

C

BASS BOOST

GAIN

D

E

F

A

10

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A

A-b

mponent parts indicates
tor of the part.

ure to use parts of

AMP UNIT

A

0dB or +12dB or +6dB

B

-1.8dBs

BASS BOOST

BASS BOOST

DTC643TU

DTC643TU

-3.1dBs

47K

47K

+38.5dBs

C

47K

47K

D

8R2K

8R2K

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>

>

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F

A

7

8

11

A

A-b

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1

-1.8dBs

BASS BOOST

0dB or +12dB or +6dB

B

-1.7dB ~

-32.1dB

The > mark found on some component parts indicates

the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of

identical designation.

0dB

-13.8dBs

GAIN

+18.3dBs

BASS BOOST

GAIN

C

←

←

Decimal points for resistor

and capacitor fixed values

are expressed as :

2.2 2R2

0.022 R022

A-b

A-a

A-a

+18.3dBs

D

0dB

Symbol indicates a resistor.

No differentiation is made between chip resistors and

discrete resistors.

Symbol indicates a capacitor.

No differentiation is made between chip capacitors and

discrete capacitors.

NOTE :

E

0dB

+18.5dBs

(BB ON

INPUT MAX)

F

A-a

12

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BASS BOOST

GAIN

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A

2

3

4

A-b

B

A-b

A-a

A-a

C

D

E

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A-a

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A

+38.5dBs

B

AMP UNIT

A

47K

47K

47K

C

A-b

A-a

D

47K

E

F

A-b

14

-3.1dBs

DTC643TU

dBs

DTC643TU

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A

>

>

B

47K

47K

C

8R2K

8R2K

A-b

A-a

2

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8

A-b

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4. PCB CONNECTION DIAGRAM

4.1 AMP UNIT

A

B

C

NOTE FOR PCB DIAGRAMS

1.The parts mounted on this PCB
include all necessary parts for
several destination.
For further information for
respective destinations, be sure
to check with the schematic dia­ gram.

2.Viewpoint of PCB diagrams

Connector

P.C.Board

Capacitor

Chip Part

SIDE A

SIDE B

A

AMP UNIT

BFC

2121

SPEAKER OUTPUTSPEAKER OUTPUTPOWER SUPPLY

3

D

12

E

321321321321321321

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A

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BASS BOOST

GAIN

SIDE A

A

B

C

321

Rch

LPF

RCA IN

L-

LPF/OFF

Lch

R+L+R-

SPEAKER
LEBEL
INPUT

D

E

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A

AMP UNIT

A

B

C

D

Rch

Lch

E

L-

R+L+R-

F

A

18

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SIDE B

11

A

B

C

D

1

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5. ELECTRICAL PARTS LIST

OTE:

A

• Parts whose parts numbers are omitted are subject to being not supplied.

• The part numbers shown below indicate chip components.

Chip Resistor
RS1/_S___J,RS1/__S___J

Chip Capacitor (except for CQS.....)

CKS....., CCS....., CSZS.....

• The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

• Meaning of the figures and others in the parentheses in the parts list.

B

Example) IC 301 is on the point (face A, 91 of x-axis, and 111 of y-axis) of the corresponding
PC board.
IC 301 (A, 91, 111) IC NJM2068V

Circuit Symbol and No. Part No.

A

Unit Number : CWH1287
Unit Name : Amp Unit

C

MISCELLANEOUS

IC 111 (B,293,51) IC NJM2068MD
IC 112 (B,274,78) IC NJM2068MD
IC 141 (B,283,103) IC NJM4558MD
IC 171 (B,286,186) IC NJM4558MD
IC 172 (B,296,183) IC NJM4558MD

IC 651 (A,168,96) IC PA2027A
IC 901 (B,158,64) IC UPC494GS
Q 201 (B,249,137) Transistor DTC643TU
Q 202 (B,252,134) Transistor DTC643TU

D

Q 203 (B,251,128) Transistor DTA124EU

Q 551 (B,220,87) Transistor 2SA1163
Q 552 (B,219,137) Transistor 2SA1163
Q 553 (B,226,89) Transistor 2SA1163
Q 554 (B,214,140) Transistor 2SA1163
Q 555 (B,224,82) Transistor 2SC2713

Q 556 (B,217,128) Transistor 2SC2713
Q 557 (B,220,80) Transistor 2SC2713
Q 558 (B,211,132) Transistor 2SC2713
Q 559 (B,215,76) Transistor 2SC2713
Q 560 (B,208,147) Transistor 2SC2713

E

Q 561 (B,230,73) Transistor 2SA1163
Q 562 (B,241,154) Transistor 2SA1163
Q 563 (B,222,72) Transistor 2SC2713
Q 564 (B,222,151) Transistor 2SC2713
Q 565 (A,230,33) Transistor 2SD1684

Q 566 (A,219,200) Transistor 2SD1684
Q 571 (B,244,71) Transistor 2SC2713
Q 572 (B,218,121) Transistor 2SC2713
Q 581 (A,242,62) Transistor 2SC3421
Q 582 (A,240,163) Transistor 2SC3421

F

Q 583 (A,276,34) Transistor 2SC4388
Q 584 (A,250,199) Transistor 2SC4388
Q 585 (A,254,34) Transistor 2SC4388

Circuit Symbol and No. Part No.

Q 586 (A,228,199) Transistor 2SC4388
Q 587 (A,210,63) Transistor 2SA1358

Q 588 (A,209,154) Transistor 2SA1358
Q 589 (A,221,34) Transistor 2SA1673
Q 590 (A,173,199) Transistor 2SA1673
Q 591 (A,199,34) Transistor 2SA1673
Q 592 (A,195,199) Transistor 2SA1673

Q 660 (A,158,74) Transistor 2SB1243
Q 661 (B,153,107) Transistor 2SA1576A
Q 662 (B,151,118) Transistor 2SC4081
Q 670 (B,268,110) Transistor 2SA1576A
Q 671 (B,265,110) Transistor 2SC4081

Q 672 (B,267,102) Transistor 2SC4081
Q 673 (B,259,111) Transistor 2SC4081
Q 674 (B,262,94) Transistor 2SA1576A
Q 691 (B,176,86) Transistor DTC114TU
Q 692 (B,174,94) Transistor DTA114EU

Q 931 (B,148,52) Transistor 2SD1766
Q 932 (B,154,41) Transistor 2SD1766
Q 933 (B,143,47) Transistor 2SB1188
Q 934 (B,145,35) Transistor 2SB1188
Q 941 (A,91,31) Transistor FKV550N

Q 942 (A,136,31) Transistor FKV550N
Q 943 (A,76,31) Transistor FKV550N
Q 944 (A,121,31) Transistor FKV550N
Q 945 (A,61,31) Transistor FKV550N
Q 946 (A,106,31) Transistor FKV550N

Q 951 (A,129,203) Transistor 2SD2395
Q 952 (A,109,203) Transistor 2SB1566
Q 981 (B,137,67) Transistor 2SA1576A
Q 991 (B,140,83) Transistor 2SC4081
Q 992 (B,144,82) Transistor DTC114TU

D 161 (A,306,66) Diode ERA15-02VH
D 162 (A,291,86) Diode ERA15-02VH
D 553 (B,211,74) Diode MA111
D 554 (B,232,146) Diode MA111
D 555 (B,209,74) Diode MA111

D 556 (B,234,145) Diode MA111
D 557 (B,247,71) Diode MA111
D 558 (B,226,121) Diode MA111
D 601 (B,247,117) LED FR1112H

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Circuit Symbol and No. Part No.

D 658 (B,165,33) Diode DAN202U

D 661 (B,171,74) Diode MA111
D 664 (B,139,114) Diode UDZS7R5(B)
D 665 (A,48,99) Diode RM4Z-LFJ4
D 670 (B,262,110) Diode MA111
D 681 (A,157,105) Diode ERA15-02VH

D 682 (A,162,108) Diode ERA15-02VH
D 951 (B,145,192) Diode UDZS16(B)
D 952 (B,123,192) Diode UDZS16(B)
D 957 (A,89,202) Diode FML22S
D 958 (A,70,202) Diode FML22R

D 991 (A,124,184) Diode ERA92-02VH
D 992 (A,121,183) Diode ERA92-02VH
D 993 (B,141,78) Diode MA111
L 601 (A,59,69) Choke Coil 50µH CTH1323
L 951

L 952
T 901 (A,100,83) Transformer CTT1122
TH901 (A,150,33) Thermistor CCX1065
TH902 (A,148,201) Thermistor CCX1065
TH903 (A,128,102) Thermistor CCX1064

S 151
S 171
S 901 (A,8,197) Switch(BFC) HSH-156
VR201

FU100 (A,19,42) Fuse 30A CEK1330

FU101 (A,19,65) Fuse 30A CEK1330
AR101 (B,315,78) Surge Protector CSA30-201N
AR102 (B,309,89) Surge Protector CSA30-201N

(A,69,163) Choke Coil 320µH

(A,40,163) Choke Coil 320µH

(A,314,98) Switch(LPF/OFF)

(A,314,178) Switch(BASS BOOST)

(A,310,151) Volume 10k Ω (A))(GAIN)

CTH1326

CTH1326

CSH1021
CSH1029

CCS1241

RESISTORS

R 111 (B,295,69) RS1/16S471J
R 112 (B,283,88) RS1/16S471J
R 113 (B,295,59) RS1/16S223J
R 114 (B,275,85) RS1/16S223J
R 117 (B,291,58) RS1/16S102J

R 118 (B,270,79) RS1/16S102J
R 121 (B,296,43) 10k Ω
R 122 (B,273,70) 10k Ω
R 123 (B,295,41) 10k Ω
R 125 (B,292,41) 10k Ω

R 126 (B,286,80) 10k Ω
R 127 (B,291,61) 10k Ω
R 131 (B,275,67) 10k Ω
R 134 (B,276,70) 10k Ω
R 152 (B,288,97) RS1/16S103J

R 154 (B,286,97) RS1/16S103J
R 157 (B,283,113) RS1/16S103J
R 159 (B,281,113) RS1/16S103J
R 171 (B,284,181) RS1/16S222J
R 172 (B,294,177) RS1/16S222J

R 173 (B,286,176) RS1/16S101J
R 174 (B,298,177) RS1/16S182J
R 175 (B,288,181) RS1/16S182J
R 176 (B,301,180) RS1/16S221J
R 177 (B,316,178) RS1/16S121J

R 178 (B,301,182) RS1/16S132J
R 179 (B,316,182) RS1/16S122J
R 180 (B,301,183) RS1/16S104J

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CCN1152
CCN1152
CCN1152
CCN1152

CCN1152
CCN1152
CCN1152
CCN1152

R 181 (B,318,182) RS1/16S104J
R 182 (B,293,188) RS1/16S273J

R 184 (B,300,189) RS1/16S331J
R 185 (B,287,193) RS1/16S331J
R 189 (B,283,195) RS1/16S273J
R 198 (B,280,97) RS1/16S0R0J
R 201 (B,249,140) RS1/16S0R0J

R 202 (B,252,131) RS1/16S0R0J
R 203 (B,285,173) RS1/16S560J
R 204 (B,297,174) RS1/16S560J
R 206 (B,267,165) RS1/16S222J
R 207 (B,273,161) RS1/16S222J

R 505 (B,260,35) RS1/16S473J
R 506 (B,265,199) RS1/16S473J
R 507 (B,237,35) RS1/16S473J
R 508 (B,242,199) RS1/16S473J
R 509 (B,248,77) RS1/16S564J

R 510 (B,225,123) RS1/16S564J
R 511 (B,241,72) RS1/16S473J
R 512 (B,222,122) RS1/16S473J
R 513 (A,12,201) RD1/2PM100J
R 514 (A,26,140) RD1/2PM100J

R 551 (B,229,40) RS1/16S182J
R 552 (B,221,194) RS1/16S182J
R 555 (B,236,87) RS1/16S103J
R 556 (B,228,133) RS1/16S103J
R 557 (B,236,89) RS1/16S473J

R 558 (B,225,130) RS1/16S473J
R 559 (B,231,89) RS1/16S331J
R 560 (B,225,140) RS1/16S331J
R 561 (B,233,89) RS1/16S331J
R 562 (B,225,142) RS1/16S331J

R 563 (B,221,84) RS1/16S681J
R 564 (B,216,136) RS1/16S681J
R 565 (B,211,86) RS1/16S361J
R 566 (B,226,126) RS1/16S361J
R 567 (B,209,86) RS1/16S433J

R 568 (B,222,126) RS1/16S433J
R 569 (B,211,79) RS1/16S681J
R 570 (B,209,143) RS1/16S681J
R 571 (B,235,72) RS1/16S223J
R 572 (B,228,151) RS1/16S223J

R 573 (B,231,40) RS1/16S390J
R 574 (B,219,194) RS1/16S390J
R 575 (A,233,70) RD1/4PU101J
R 576 (A,234,154) RD1/4PU101J
R 577 (B,221,65) RS1/16S681J

R 578 (B,217,152) RS1/16S681J
R 579 (B,226,71) RS1/16S181J
R 580 (B,221,144) RS1/16S181J
R 581 (B,234,67) RS1/16S100J
R 582 (B,240,158) RS1/16S100J

R 583 (B,219,66) RS1/16S100J
R 584 (B,217,150) RS1/16S100J
R 585 (A,281,31) RD1/2PM100J
R 586 (A,245,202) RD1/2PM100J
R 587 (A,258,31) RD1/2PM100J

R 588 (A,224,202) RD1/2PM100J
R 589 (B,238,30) RS1/16S221J
R 590 (B,213,205) RS1/16S221J

GM-520T/XU/UC

>

>

Circuit Symbol and No. Part No.

7

8

A

B

C

D

E

F

21

1234

Circuit Symbol and No. Part No.

R 591 (A,204,31) RD1/2PM100J
R 592 (A,190,202) RD1/2PM100J

A

R 593 (A,225,31) RD1/2PM100J
R 594 (A,168,202) RD1/2PM100J
R 595 (A,265,51) 0.1 Ω
R 596 (A,261,192) 0.1 Ω
R 597 (A,243,51) 0.1 Ω

CCN1155
CCN1155
CCN1155

Circuit Symbol and No. Part No.

R 966 (B,126,74) RS1/16S153J
R 970 (A,164,199) RD1/2PM182J

R 973 (B,151,60) RS1/16S103J
R 974 (B,162,39) RS1/16S472J
R 975 (B,162,42) RS1/16S472J
R 976 (B,162,41) RS1/16S472J
R 977 (B,161,34) RS1/16S272J

R 598 (A,240,192) 0.1 Ω
R 599 (A,210,42) 0.1 Ω
R 600 (A,184,183) 0.1 Ω
R 601 (A,188,42) 0.1 Ω
R 602 (A,206,183) 0.1 Ω

R 621 (A,168,67) RD1/4PU101J

B

R 622 (A,164,72) RD1/4PU472J
R 623 (B,175,83) RS1/16S563J
R 624 (B,150,82) RS1/16S221J
R 625 (A,154,85) RD1/4PU152J

R 630 (A,163,83) RD1/4PU271J
R 631 (A,161,77) RD1/4PU471J
R 632 (B,162,115) RS1/16S223J
R 633 (B,170,103) RS1/16S223J
R 634 (B,162,113) RS1/16S223J

R 640 (B,156,99) RS1/16S472J
R 641 (B,149,106) RS1/16S822J

C

R 642 (B,136,107) RS1/16S822J
R 644 (B,153,103) RS1/16S103J
R 645 (B,150,115) RS1/16S222J

R 646 (B,150,113) RS1/16S472J
R 647 (B,145,114) RS1/16S103J
R 648 (B,144,116) RS1/16S103J
R 649 (B,142,119) RS1/16S473J
R 650 (A,44,79) RD1/4PU222J

R 666 (B,39,76) RS1/16S1R0J
R 670 (B,270,115) RS1/16S104J
R 671 (B,267,114) RS1/16S472J

D

R 672 (A,263,104) RD1/4PU103J
R 673 (B,268,96) RS1/16S562J

R 674 (B,253,110) RS1/16S472J
R 675 (B,251,110) RS1/16S222J
R 676 (A,265,97) RD1/4PU221J
R 831 (A,304,63) RD1/4PU683J
R 832 (A,307,62) RD1/4PU683J

R 901 (B,140,62) RS1/16S124J
R 921 (B,139,46) RS1/16S472J
R 922 (B,139,42) RS1/16S472J
R 923 (A,147,47) RD1/4PU332J

E

R 924 (A,158,31) RD1/4PU332J

R 931 (A,95,38) RD1/2PM121J
R 932 (A,141,31) RD1/2PM121J
R 933 (A,80,38) RD1/2PM121J
R 934 (A,125,38) RD1/2PM121J
R 935 (A,65,38) RD1/2PM121J

R 936 (A,111,38) RD1/2PM121J
R 941 (A,72,65) RD1/2PM220J
R 942 (A,124,54) RD1/2PM220J
R 951 (A,139,197) RD1/4PU103J
R 952 (A,112,190) RD1/4PU103J

F

R 953 (A,142,198) RD1/2PM470J
R 954 (A,118,201) RD1/2PM470J
R 961 (A,115,109) RD1/2PM220J

22

1234

CCN1155
CCN1155
CCN1155
CCN1155
CCN1155

R 978 (B,168,35) RS1/16S272J
R 979 (B,168,38) RS1/16S272J
R 980 (B,141,65) RS1/16S105J
R 981 (B,148,74) RS1/16S153J
R 982 (B,146,70) RS1/16S102J

R 983 (B,142,73) RS1/16S473J
R 984 (B,140,73) RS1/16S202J
R 985 (B,142,68) RS1/16S101J
R 986 (B,140,68) RS1/16S223J
R 987 (B,132,85) RS1/16S103J

R 991 (A,139,185) RD1/2PM391J
R 992 (A,125,180) RD1/2PM391J
R 993 (B,138,79) RS1/16S222J
R 998 (B,269,121) RS1/16S102J

CAPACITORS

C 111 (B,297,62) CKSRYB471K50
C 112 (B,283,86) CKSRYB471K50
C 113 (A,299,61) CEAT100M50
C 114 (A,279,89) CEAT100M50
C 121 (A,284,68) CFTNA223J50

C 122 (A,284,72) CFTNA223J50
C 123 (B,289,61) CCSRCH470J50
C 124 (B,286,78) CCSRCH470J50
C 125 (A,286,63) CFTNA103J50
C 126 (A,283,76) CFTNA103J50

C 127 (B,292,43) CCSRCH470J50
C 128 (B,273,72) CCSRCH470J50
C 151 (A,283,117) CFTNA274J50
C 152 (A,303,91) CFTNA274J50
C 153 (A,287,102) CFTNA154J50

C 154 (A,301,97) CFTNA154J50
C 171 (A,289,173) CFTNA273J50
C 172 (A,300,174) CFTNA273J50
C 173 (A,310,202) CEANP4R7M50
C 181 (A,298,200) CFTNA224J50

C 182 (A,300,194) CFTNA224J50
C 184 (A,315,199) CEANP4R7M50
C 551 (A,239,84) CEAT101M16
C 552 (A,232,136) CEAT101M16
C 553 (B,236,90) CCSRCH680J50

C 554 (B,227,130) CCSRCH680J50
C 555 (B,218,84) CKSRYB471K50
C 556 (B,212,136) CKSRYB471K50
C 559 (A,210,91) CEAT221M10
C 560 (A,229,125) CEAT221M10

C 561 (B,208,86) CCSRCH150J50
C 562 (B,222,127) CCSRCH150J50
C 563 (B,228,70) CCSRCH470J50
C 564 (B,244,158) CCSRCH470J50
C 565 (A,230,65) CFTNA223J50

C 566 (A,218,157) CFTNA223J50

GM-520T/XU/UC

5678

Circuit Symbol and No. Part No.

C 567 (A,38,201) CFTNA333J50
C 568 (A,26,155) CFTNA333J50
C 569 (A,31,203) CQHA102J2A
C 570 (A,26,144) CQHA102J2A

C 571 (B,238,67) CCSRCH220J50
C 572 (B,244,161) CCSRCH220J50
C 573 (B,216,66) CCSRCH220J50
C 574 (B,214,151) CCSRCH220J50
C 575 (B,239,63) CCSRCH220J50

C 576 (B,244,163) CCSRCH220J50
C 577 (B,218,63) CCSRCH220J50
C 578 (B,213,153) CCSRCH220J50
C 581 (A,279,44) CFTNA103J50
C 582 (A,268,195) CFTNA103J50

C 650 (A,136,86) CEAT220M25
C 651 (A,174,77) CEAT471M16
C 652 (A,171,114) CFTNA103J50
C 653 (A,158,117) CFTNA103J50
C 671 (A,175,102) CEAT101M16

C 672 (A,171,118) CFTNA103J50
C 673 (A,143,109) CEAT100M50
C 674 (A,141,103) CEAT100M50
C 675 (A,166,101) CFTNA103J50
C 676 (A,133,119) CFTNA103J50

A

B

C 677 (A,25,86) CFTNA224J50
C 681 (A,271,118) CEANP221M10
C 691 (A,178,94) CEAT220M25
C 831 (A,311,38) CEAT100M50
C 832 (A,301,38) CEAT100M50

C 903 (A,149,67) CEAT2R2M50
C 941 (A,66,98) 3900µF/16V CCH1644(P35)
C 942 (A,67,81) 3900µF/16V CCH1644(P35)
C 943 (A,70,50) CQHA472J2A
C 944 (A,129,49) CQHA472J2A

C 951 (A,150,193) CQHA102J2A
C 952 (A,123,199) CQHA102J2A
C 953 (A,157,194) CEAT470M16
C 954 (A,128,191) CEAT470M16
C 955 (A,134,191) CEAT470M25

C 956 (A,114,195) CEAT470M25
C 957 (A,62,132) 2200µF/50V CCH1647(P35)
C 958 (A,42,132) 2200µF/50V CCH1647(P35)
C 959 (A,62,153) 2200µF/50V CCH1647(P35)
C 960 (A,42,152) 2200µF/50V CCH1647(P35)

C 962 (A,109,122) CQHA102J2A
C 970 (A,172,61) CFTNA103J50
C 971 (A,132,64) CFTNA564J50
C 972 (A,167,64) CEAT101M16
C 973 (A,151,74) CQHA102J2A

C

D

E

C 974 (A,144,72) CEAT221M16
C 975 (A,132,74) CEANP470M16
C 980 (A,144,53) CFTNA103J50
C 991 (A,145,179) CEAT471M50(P45)
C 992 (A,120,177) CEAT471M50(P45)

C 993 (A,135,173) CQHA102J2A
C 994 (A,130,173) CQHA102J2A
C 999 (B,248,126) CKSRYB224K16

56

GM-520T/XU/UC

F

7

8

23

1234

6. ADJUSTMENT

There is no information to be shown in this chapter.

A

B

C

D

E

F

24

1234

GM-520T/XU/UC

5678

7. GENERAL INFORMATION

7.1 DIAGNOSIS

7.1.1 DISASSEMBLY

- Removing the Case (Fig.1)

1

Remove the six screws and then remove
the Case.

A

1

1

1

B

- Removing the Amp Unit (Fig.2)

1

Remove the fifteen screws and then
remove the Amp Unit.

1

1

Case

1

1

1

1

1

1

1

1

1 1

1

1

1

1

Fig.1

1

1

C

D

56

GM-520T/XU/UC

Amp Unit

7

Fig.2

8

E

F

25

1234

7.1.2 CONNECTOR FUNCTION DESCRIPTION

A

B

C

D

E

F

26

1234

GM-520T/XU/UC

5678

8. OPERATIONS

A

B

C

D

E

56

GM-520T/XU/UC

F

7

8

27

1234

A

B

C

D

E

F

28

1234

GM-520T/XU/UC

5678

A

B

C

D

E

56

GM-520T/XU/UC

F

7

8

29