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GM-X1024/X1R/UC
BRIDGEABL FOUR-CHANNEL POWER AMPLIFIER
GM-X1024
X1R/UC
Service
Manual
GM-X924
X1R/UC,EW,ES
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, Lane Wheelock Place, Singapore 23880
C PIONEER ELECTRONIC CORPORATION 1998
ORDER NO.
CRT2191
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
3. SCHEMATIC DIAGRAM .............................................8
4. PCB CONNECTION DIAGRAM ................................14
5. ELECTRICAL PARTS LIST ........................................19
6. ADJUSTMENT..........................................................25
7. GENERAL INFORMATION .......................................26
7.1 IC ........................................................................26
7.2 DISASSEMBLY ...................................................27
7.3 BLOCK DIAGRAM ..............................................28
8. OPERATIONS AND SPECIFICATIONS.....................29
K-FED. MAR. 1998 Printed in Japan


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2
GM-X1024,GM-X924
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
3
5
4
2
10
8
9
6
7
9
Fig. 1
1. 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
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive
toxicant which may cause birth defects or other reproductive harm (California Health and 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.


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3
GM-X1024,GM-X924
(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.
1 ·····
*
2 Screw Assy
HEA0044
3 Screw
BYC40P180FZK
4 Polyethylene Bag
HEG0011
5 Wrench
HLP0001
6 Polyethylene Bag
HEG0013
7 Carton
See Contrast table (2)
8 Contain Box
See Contrast table (2)
9 Protector
HHP0025
10-1 Owner's Manual
See Contrast table (2)
* 10-2 Card
See Contrast table (2)
* 10-3 Warranty Card
See Contrast table (2)
10-4 Owner's Manual
See Contrast table (2)
(2) CONTRAST TABLE
GM-X1024/X1R/UC, GM-X924/X1R/UC, GM-X924/X1R/EW and GM-X924/X1R/ES are constructed the same except for
the following:
Part No.
GM-X1024
GM-X924
Mark
No.
Symbol and Description
X1R/UC
X1R/UC
X1R/EW
X1R/ES
7
Carton
HHG0154
HHG0155
HHG0158
HHG0157
8
Contain Box
HHL0154
HHL0155
HHL0158
HHL0157
10-1
Owner's Manual
HRD0056
HRD0057
HRD0059
HRD0058
*
10-2
Card
Not used
ARY1048
Not used
Not used
*
10-3
Warranty Card
HRY1070
Not used
HRY1087
Not used
10-4
Owner's Manual
Not used
Not used
Not used
HRD0068
- Owner's Manual
Model
Part No.
Language
GM-X1024/X1R/UC
HRD0056
English, French
GM-X924/X1R/UC
HRD0057
English, French
GM-X924/X1R/EW
HRD0059
English, French, German, Dutch, Spanish, Italian
GM-X924/X1R/ES
HRD0058
English, Spanish
HRD0068
Arabic, Poltuguese (B)


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4
GM-X1024,GM-X924
2.2 EXTERIOR
Fig. 2


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5
GM-X1024,GM-X924
1 Screw(M3
×25)
HBA0013
2 Screw(M3
×12)
CBA1323
3 Screw(M3
×14)
CBA1382
4 Sheet
CNM5852
5 Screw(M3
×5)
HBA0006
6 Screw(M3
×8)
HBA0011
7 Screw(M2.6
×6)
HBA0012
8 Washer
HBF0005
9 Case
HNB0036
10 Separator
HNM0046
11 Heat Sink
See Contrast table (2)
12 Window
HNS0053
13 Lighting Conductor
HNV0012
14 Amp Unit
See Contrast table (2)
15 Screw
BMS30P060FZK
16 Screw
BMS30P080FMC
17 Terminal(CN905)
CKF1059
18 Plug(CN503)
CKS1039
19 Plug(CN553)
CKS1039
20 Connector(CN853)
CKS3813
21 Connector(CN852)
CKS3814
22 Holder
CNV4017
23 Cord(CN104)
HDE5500
24 Cord(CN304)
HDE5500
25 Bass Bar
HNC0043
26 Bass Bar
HNC0044
27 Bass Bar
HNC0046
28 Bass Bar
HNC0047
29 Bass Bar
HNC0049
30 Bass Bar
HNC0050
31 Bass Bar
HNC0052
32 Bass Bar
HNC0055
33 Spacer
HNM0053
34 Heat Sink
HNR0079
35 Heat Sink
HNR0080
36 Clamper
HNV0003
37 Clamper
HNV0015
38 Spacer
HNV3975
39 Network Unit
See Contrast table (2)
40 Plug(CN501)
CKS1039
41 Plug(CN551)
CKS1039
42 Plug(CN102)
CKS1621
43 Plug(CN302)
CKS1621
44 Connector(CN857)
CKS3815
45 Connector(CN856)
CKS3816
46 Cord(CN502)
HDE5501
47 Cord(CN552)
HDE5501
48 Cord(CN854)
HDE5501
49 Cord(CN855)
HDE5501
50 Holder
HNC0029
51 Clip
HNC0054
52 Screw(M3
×25)
HBA0013
53 Fan Motor
CXM1102
54 Fuse
HEK0030
55 Pin Jack(CN801)
HKB0002
56 Pin Jack(CN851)
HKB0004
57 Terminal(CN101)
HKE0010
58 Terminal(CN301)
HKE0010
59 Fuse Holder(CN902)
HKE0012
60 Terminal(CN901)
HKE0014
61 Holder
HNC0027
62 Holder
HNC0028
63 Screw
PPZ30P060FZK
64 Plate Unit
See Contrast table (2)
65 Sheet Unit
See Contrast table (2)
66 Light Pipe Unit
HXA0201
67 Plate Unit
See Contrast table (2)
68 Panel Unit
See Contrast table (2)
69 Panel
See Contrast table (2)
70 Plate
See Contrast table (2)
71 Panel Unit
See Contrast table (2)
72 Front Panel
See Contrast table (2)
73 Plate
See Contrast table (2)
74 Screw
SMZ30H080FCR
75 Screw
BSZ30P050FZK
76 Film
See Contrast table (2)
77 Film
See Contrast table (2)
78 LED(D903,904)
NSPWF50S(AQ)
79 Diode(D961)
FML22R
80 Diode(D962)
FML22S
81 Transistor(Q112,212,312,412) 2SC1568
82 FET(Q963­968)
IRFIZ44N
83 Transistor(Q115,215,315,415) 2SC5101
84 Transistor(Q116,216,316,416) 2SA1919
85 Thermistor(TH901)
CCX1027
86 Thermistor(TH902,903)
CCX1035
87-93 ·····
94 Sheet
CNM5950
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.