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ORDER NO.
CRT2168
Service
Manual
BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER
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. 501 Orchard Road, #10-00, Wheelock Place, Singapore 238880
C PIONEER ELECTRONIC CORPORATION 1998
K-ZEU. JAN. 1998 Printed in Japan
GM-X424
X1R/UC, ES, EW
CONTENTS
1. SAFETY INFORMATION ............................................1
2. EXPLODED VIEWS AND PARTS LIST .......................2
3. SCHEMATIC DIAGRAM .............................................6
4. PCB CONNECTION DIAGRAM ..................................8
5. ELECTRICAL PARTS LIST ........................................12
6. ADJUSTMENT..........................................................16
7. GENERAL INFORMATION .......................................16
7.1 DISASSEMBLY ...................................................16
8. OPERATIONS AND SPECIFICATIONS.....................17
1. SAFETY INFORMATION
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 mot risk trying to do so
and refer the repair to a qualified service technician.
UC model
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
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxi-
cant which may cause birth defects or other reproductive harm (California Health & Safety Code, Section 25249.5).
When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin
contact with the solder. Also, when soldering do not inhale any smoke or fumes produced.
GM-X324
X1R/UC


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2
GM-X424, GM-X324
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
1 Contain Box
See Contrast table (2)
2 Carton
See Contrast table (2)
3 Protector
HHP0020
4 Polyethylene Bag
HEG0009
5 Screw(x4)
BYC40P180FZK
6 Polyethylene Bag
HEG0011
7 Terminal(x8)
See Contrast table (2)
8 Cord Assy
See Contrast table (2)
9-1 Owner's Manual
See Contrast table (2)
9-2 Owner's Manual
See Contrast table (2)
*
9-3 Warranty Card
See Contrast table (2)
*
9-4 Caution Card
See Contrast table (2)
*
9-5 Card
See Contrast table (2)
(1) PACKING SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
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.
Fig. 1


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3
GM-X424, GM-X324
(2) CONTRAST TABLE
GM-X424/X1R/UC, GM-X424/X1R/ES, GM-X424/X1R/EW and GM-X324/X1R/UC are constructed the same except for the
following:
Part No.
GM-X424
GM-X324
Mark
No.
Symbol and Description
X1R/UC
X1R/ES
X1R/EW
X1R/UC
1
Contain Box
HHL0142
HHL0143
HHL0144
HHL0141
2
Carton
HHG0142
HHG0143
HHG0144
HHG0141
7
Terminal(x8)
HKC0001
HKC0003
HKC0003
HKC0003
8
Cord Assy
Not used
HDE4419
HDE4419
Not used
9-1
Owner's Manual
HRD0052
HRD0050
HRD0055
HRD0054
9-2
Owner's Manual
Not used
HRD0053
Not used
Not used
*
9-3
Warranty Card
HRY1070
Not used
HRY1087
Not used
*
9-4
Caution Card
HRP0006
Not used
Not used
Not used
*
9-5
Card
Not used
Not used
Not used
ARY1048
- Owner's Manual
Model
Part No.
Language
GM-X424/X1R/UC
HRD0052
English, French
GM-X424/X1R/ES
HRD0050
English, Spanish
HRD0053
Arabic, Portuguese(B)
GM-X424/X1R/EW
HRD0055
English, French, German, Dutch, Spanish, Italian
GM-X324/X1R/UC
HRD0054
English, French


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4
GM-X424, GM-X324
2.2 EXTERIOR
Fig. 2


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5
GM-X424, GM-X324
1 Screw
BSZ30P050FZK
2 Screw(M3x6)
CBA1320
3 Screw(M3x12)
CBA1323
4 Screw
CBA1382
5 Screw
HBA0006
6 Panel
See Contrast table (2)
7 Case
HNB0015
8 Panel
See Contrast table (2)
9 Heat Sink
See Contrast table (2)
10 Spacer
HNV3975
11 Amp Unit
See Contrast table (2)
12 Screw
BMS30P060FZK
13 Screw
BMS30P080FMC
14 Connector(CN854)
HDE5212
15 Plug(CN863)
CKS1618
16 Clamper
HNV0006
17 Cord(CN901)
HDC1030
18 Cord(CN602)
HDE4610
19 Bass Bar
HNC0014
20 Holder
HNC5538
21 Holder
HNC5540
22 Holder
HNC5541
23 Holder
HNC5841
24 Heat Sink(Sub Heat Sink) HNR0050
25 Heat Sink(Sub Heat Sink) HNR0052
26 Clamper
HNV0003
27 Holder
HNV0005
28 Pin Jack(CN852)
See Contrast table (2)
29 Pin Jack(CN851)
See Contrast table (2)
30 Terminal(CN601)
See Contrast table (2)
31 Terminal(CN303)
See Contrast table (2)
32 Holder
HNC0006
33 Screw
PPZ30P060FZK
34 Plate Unit
See Contrast table (2)
35 Fuse(FU999)(25A)
HEK0025
36 Holder
CNC5399
37 Diode(D609)
RBV-602L
38 Thermistor(TH603)
CCX1013
39 FET(Q610-613)
IRFIZ44N
40 Transistor(Q313-316)
2SD2343
41 Transistor(Q329-332)
2SB1587
42 Transistor(Q325-328)
2SD2438
43 Cord Assy
See Contrast table (2)
44 Special Red Battery Wire See Contrast table (2)
45 Fuse(30A)
See Contrast table (2)
46 Ground Wire(Black)
See Contrast table (2)
47 ·····
48 System Remote Control
See Contrast table (2)
49 Badge Unit
See Contrast table (2)
50 Light Pipe Unit
HXA0182
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
(2) CONTRAST TABLE
GM-X424/X1R/UC, GM-X424/X1R/ES, GM-X424/X1R/EW and GM-X324/X1R/UC are constructed the same except for the
following:
Part No.
GM-X424
GM-X324
Mark
No.
Symbol and Description
X1R/UC
X1R/ES
X1R/EW
X1R/UC
6
Panel
HNB0053
HNB0071
HNB0071
HNB0054
8
Panel
HNB0048
HNB0070
HNB0070
HNB0049
9
Heat Sink
HNR0091
HNR0098
HNR0098
HNR0095
11
Amp Unit
HWH0054
HWH0052
HWH0051
HWH0053
28
Pin Jack(CN852)
HKB0002
HKB0001
HKB0001
Not used
29
Pin Jack(CN851)
HKB0004
HKB0003
HKB0003
HKB0003
30
Terminal(CN601)
HKE0002
HKE0001
HKE0001
HKE0001
31
Terminal(CN303)
HKE0006
HKE0005
HKE0005
HKE0005
34
Plate Unit
HXA0165
HXA0162
HXA0162
HXA0162
43
Cord Assy
Not used
HDE4419
HDE4419
Not used
44
Special Red Battery Wire
Not used
HDE4423
HDE4423
Not used
45
Fuse(30A)
Not used
HEK0030
HEK0030
Not used
46
Ground Wire(Black)
Not used
HDE4455
HDE4455
Not used
48
System Remote Control
Not used
HDE0007
HDE0007
Not used
49
Badge Unit
HXA0168
HXA0164
HXA0164
HXA0164