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PIONEER ELECTRONIC CORPORATION
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE INC.
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER ELECTRONIC [EUROPE] N.V.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1999
K-ZZA. JAN. 1999 Printed in Japan
ORDER NO.
CRT2358
BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER
GM-X434
X1R/UC
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
3. SCHEMATIC DIAGRAM .............................................6
4. PCB CONNECTION DIAGRAM ................................12
5. ELECTRICAL PARTS LIST ........................................16
6. ADJUSTMENT..........................................................20
7. GENERAL INFORMATION .......................................20
7.1 IC .........................................................................20
7.2 DISASSEMBLY ...................................................22
8. OPERATIONS AND SPECIFICATIONS.....................23
GM-X334
X1R/UC,EW,ES
GM-X434/X1R/UC


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2
GM-X434,X334
1
2
7
5
4
6
3
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
1. SAFETY INFORMATION
- GM-X434/X1R/UC, GM-X334/X1R/UC
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
8
11
9
10


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GM-X434,X334
3
- Owner's Manual
Model
Part No.
Language
GM-X434/X1R/UC
HRD0075
English, French
GM-X334/X1R/UC
HRD0074
English, French
GM-X334/X1R/EW
HRD0076
English, Spanish, German, French, Italian, Dutch
GM-X334/X1R/ES
HRD0077
English, Spanish
HRD0078
Portuguese(B), Arabic
1 Screw
BYC40P180FZK
2 Polyethylene Bag
HEG0011
3 Polyethylene Bag
HEG0009
4 Carton
See Contrast table(2)
5 Contain Box
See Contrast table(2)
6 Protector
HHP0047
7-1 Owner's Manual
See Contrast table(2)
7-2 Owner's Manual
See Contrast table(2)
*
7-3 Warranty Card
See Contrast table(2)
*
7-4 Card
See Contrast table(2)
*
7-5 PRC
See Contrast table(2)
8 Cord Assy
See Contrast table(2)
9 Cord(Remote)
See Contrast table(2)
10 Cord(Power)
See Contrast table(2)
11 Cord(Ground)
See Contrast table(2)
Mark No. Description
Part No.
(1) PACKING SECTION PARTS LIST
NOTE:
- Parts marked by "*" are generally unavailable because they are not in our Master Spare Parts List.
- Screws adjacent to
mark on the product are used for disassembly.
Part No.
Mark No. Symbol and Description GM-X434/X1R/UC
GM-X334/X1R/UC
GM-X334/X1R/EW GM-X334/X1R/ES
4 Carton
HHG0176
HHG0175
HHG0177
HHG0178
5 Contain Box
HHL0176
HHL0175
HHL0177
HHL0178
7-1 Owner's Manual
HRD0075
HRD0074
HRD0076
HRD0077
7-2 Owner's Manual
Not used
Not used
Not used
HRD0078
*
7-3 Warranty Card
HRY1070
Not used
HRY1087
Not used
*
7-4 Card
Not used
ARY1048
Not used
Not used
*
7-5 PRC
HRY0007
HRY0007
Not used
Not used
8 Cord Assy
Not used
Not used
HDW0004
HDW0004
9 Cord(Remote)
Not used
Not used
HDE0007
HDE0007
10 Cord(Power)
Not used
Not used
HDE4423
HDE4423
11 Cord(Ground)
Not used
Not used
HDE4455
HDE4455
(2) CONTRAST TABLE
GM-X434/X1R/UC, GM-X334/X1R/UC, GM-X334/X1R/EW and GM-X334/X1R/ES are constructed the
same except for the following:


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4
GM-X434,X334
2.2 EXTERIOR


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5
GM-X434,X334
1 Screw
BSZ30P050FZK
2 Screw(M3
×6)
CBA1320
3 Screw(M3
×12)
CBA1323
4 Screw(M3
×5)
HBA0006
5 Screw(M2.6
×8)
HBA1462
6 Panel
See Contrast table(2)
7 Panel
See Contrast table(2)
8 Lower Case
HNB2416
9 Heat Sink
See Contrast table(2)
10 Spacer
HNV3975
11 Amp Unit
See Contrast table(2)
12 Screw
BMS30P060FZK
13 Screw
BMS30P080FMC
14 Terminal(CN902)
CKF1059
15 Cord(CN831)
See Contrast table(2)
16 Buss Bar
HNC8121
17 Sub Heat Sink
HNR1521
18 Sub Heat Sink
HNR1522
19 Clamper
See Contrast table(2)
20 Pin Jack(CN802)
See Contrast table(2)
21 Pin Jack(CN801)
See Contrast table(2)
22 Fuse(25A)
HEK0025
23 Terminal(CN901)
See Contrast table(2)
24 Terminal(CN151)
See Contrast table(2)
25 Terminal(CN833)
See Contrast table(2)
26 Holder
HNC8117
27 Holder
HNC8119
28 Screw
PPZ30P060FZK
29 Light Pipe Unit
HXB3450
30 Plate Unit
See Contrast table(2)
31 Thermistor(TH951, 952)
CCX1013
32 Transistor(Q154, 254, 354, 454)
2SD2343
33 Diode(D957)
FML22R
34 FET(Q956, 957, 958, 959) IRFIZ44N
35 Diode(D956)
FML22S
36 Transistor(Q155, 255, 355, 455)
2SD2438
37 Transistor(Q156, 256, 356, 456)
2SB1587
38 ·····
39 Cord
See Contrast table(2)
40 Cord
See Contrast table(2)
41 Fuse(30A)
See Contrast table(2)
42 Cord
See Contrast table(2)
43 Screw
See Contrast table(2)
44 Screw
See Contrast table(2)
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
Part No.
Mark No. Symbol and Description GM-X434/X1R/UC
GM-X334/X1R/UC
GM-X334/X1R/EW GM-X334/X1R/ES
6 Panel
HNB2409
HNB2408
HNB2403
HNB2403
7 Panel
HNB2415
HNB2410
HNB2413
HNB2410
9 Heat Sink
HNR1514
HNR1512
HNR1512
HNR1512
11 Amp Unit
HWH0082
HWH0081
HWH0079
HWH0080
15 Cord(CN831)
HDE5817
HDE5817
Not used
HDE5817
19 Clamper
HNV0003
HNV0003
Not used
HNV0003
20 Pin Jack(CN802)
CKB1013
Not used
CKB1011
CKB1011
21 Pin Jack(CN801)
CKB1020
CKB1019
CKB1019
CKB1019
23 Terminal(CN901)
HKE0002
HKE0001
HKE0001
HKE0001
24 Terminal(CN151)
HKE0022
HKE0023
HKE0023
HKE0023
25 Terminal(CN833)
HKE0027
HKE0026
Not used
HKE0026
30 Plate Unit
HXB3553
HXB3552
HXB3552
HXB3552
39 Cord
Not used
Not used
HDE0007
HDE0007
40 Cord
Not used
Not used
HDE4423
HDE4423
41 Fuse(30A)
Not used
Not used
HEK0030
HEK0030
42 Cord
Not used
Not used
HDE4455
HDE4455
43 Screw
PPZ30P060FZK
Not used
PPZ30P060FZK
PPZ30P060FZK
44 Screw
PPZ30P060FZK
PPZ30P060FZK
Not used
PPZ30P060FZK
(2) CONTRAST TABLE
GM-X434/X1R/UC, GM-X334/X1R/UC, GM-X334/X1R/EW and GM-X334/X1R/ES are constructed the
same except for the following: