Pioneer GM-520T User manual

ORDER NO.
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
GM-520T/XU/UC
CRT3519
BRIDGEABLE TWO-CHANNEL POWER AMPLIFIER
GM-520T
/XU/UC
For details, refer to "Important Check Points for Good Servicing".
K-ZZA. AUG. 2005 Printed in Japan

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SAFETY INFORMATION
CAUTION
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
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.
1Use specified parts for repair.
Use genuine parts. Be sure to use important parts for safety.
2Do 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.
3Make 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)
4Make sure the screws are tightly fastened.
Please be sure that all screws are fastened, and that there are no loose screws.
5Make sure each connectors are correctly inserted.
Please be sure that all connectors are inserted, and that there are no imperfect insertion.
6Make 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.
7Make sure screws and soldering scraps do not remain inside the product.
Please check that neither solder debris nor screws remain inside the product.
8There 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.
9There 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.
0Safe 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.
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.
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.
3. Lubricants, Glues, and Replacement parts
Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.
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
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
2.1 PACKING
N
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.
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.)
"
1
9
6
3
2
4
5
5
8
7

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PACKING SECTION PARTS LIST
Owner's Manual
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
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
Mark No. Description Part No.
Part No. Language
CRD4010 English, French, Spanish

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2.2 EXTERIOR
A
11
1
10
34
38
37
36
35
10
13
13 13
13
26 13
13
28
27
13
13
13
29
30
19
14
18
2
13
13
13
29
25 16
32
32
7
1
1
1
1
1
6
2
3
3
2
2
2
8
2
20
20
20
2
1
17
15
31
33
22 21
2423
29
29
13
13
13
12
10
10
4
9
2
2
2

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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
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
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-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or
"ELECTRICAL PARTS LIST".
A-a
A
Decimal points for resistor
and capacitor fixed values
are expressed as :
2.2 2R2
0.022 R022
←
←
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.
Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.
NOTE :
Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.
BASS BOOST
GAIN
BASS BOOST
GAIN
0dB 0dB
+18.5dBs
(BB ON
INPUT MAX)
0dB -1.7dB ~
-32.1dB 0dB or +12dB or +6dB
+18.3dBs -13.8dBs -1.8
d
+18.3dBs

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A-b
A-a A-b
A-a A-b
A-b
A-a
A
DTC643TU
DTC643TU
47K
47K
47K
47K
8R2K
8R2K
AAMP UNIT
o
mponent parts indicates
c
tor of the part.
s
ure to use parts of
>
>
BASS BOOST
BASS BOOST
0dB or +12dB or +6dB
-1.8dBs
-3.1dBs
+38.5dBs

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A-a A-b A-a
A-a
A-b
1
Decimal points for resistor and capacitor fixed values are expressed as : 2.2 2R2 0.022 R022
←
←
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.
Symbol indicates a resistor. No differentiation is made between chip resistors and discrete resistors.
NOTE :
Symbol indicates a capacitor. No differentiation is made between chip capacitors and discrete capacitors.
BASS BOOST
GAIN
BASS BOOST
GAIN
0dB 0dB
+18.5dBs (BB ON INPUT MAX)
0dB -1.7dB ~
-32.1dB 0dB or +12dB or +6dB
+18.3dBs -13.8dBs -1.8dBs
+18.3dBs

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A-a A-b A-a
A-a
A-b
234
BASS BOOST
GAIN

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A-a A-b
A-b
1
DTC643TU
DTC643TU
47K 47K
47K 47K
A
AMP UNIT
8
dBs
-3.1dBs
+38.5dBs

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A-a A-b
A-b
234
47K 47K
8R2K 8R2K
>
>

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4. PCB CONNECTION DIAGRAM
4.1 AMP UNIT
Capacitor
Connector
P.C.Board Chip Part
A
AAMP UNIT
SIDE B
SIDE A
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
3213
213 213 213 213 21
BFC
SPEAKER OUTPUTSPEAKER OUTPUTPOWER SUPPLY
2121
12
3

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A
SIDE A
Lch
Rch
321
LPF/OFF
RCA IN
BASS BOOST
GAIN
LPF
SPEAKER
LEBEL
INPUT
R+
L+
R-
L-

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A
AAMP UNIT
R+
L+
R-
L-
Lch Rch

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A
SIDE B
11 1

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5. ELECTRICAL PARTS LIST
N
OTE:
•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.
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
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
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
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
Q 583 (A,276,34) Transistor 2SC4388
Q 584 (A,250,199) Transistor 2SC4388
Q 585 (A,254,34) Transistor 2SC4388
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
Circuit Symbol and No. Part No.