Pioneer GMX-742, GMX-942 Service manual
PIONEER 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 EUROPE N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2000
K-ZZA. JAN. 2000 Printed in Japan
ORDER NO.
CRT2454
BRIDGEABLE POWER AMPLIFIER
GM-X942 X1R/UC,EW,ES
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST.......................2
3. SCHEMATIC DIAGRAM .............................................8
4. PCB CONNECTION DIAGRAM ................................20
5. ELECTRICAL PARTS LIST ........................................28
6. ADJUSTMENT..........................................................33
7. GENERAL INFORMATION .......................................34
7.1 DISASSEMBLY ...................................................34
7.2 IC .........................................................................36
8. OPERATIONS AND SPECIFICATIONS.....................37
GM-X742 X1R/UC,EW,ES
GM-X942/X1R/UC
2
GM-X942,X742
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
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.
W
ARNING
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-X942/X1R/UC, GM-X742/X1R/UC
3
GM-X942,X742
1 Screw Assy HEA0049
2 Screw BYC40P180FZK
3 Polyethylene Bag HEG0011
4 Polyethylene Bag HEG0022
5 Carton
See Contrast table(2)
6 Contain Box See Contrast table(2)
7 Protector HHP0076
8-1 Owner’s Manual
See Contrast table(2)
* 8-2 PRC
See Contrast table(2)
* 8-3 Warranty Card
See Contrast table(2)
8-4 Owner’s Manual
See Contrast table(2)
Mark No. Description Part No. Mark No. Description Part No.
(1) PACKING SECTION PARTS LIST(GM-X942/X1R/UC, EW, ES)
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-X942/X1R/UC GM-X942/X1R/EW GM-X942/X1R/ES
5 Carton HHG0229 HHG0230 HHG0231
6 Contain Box HHL0229 HHL0230 HHL0231
8-1 Owner’s Manual HRD0123 HRD0124 HRD0125
* 8-2 PRC HRY0012 Not used Not used
* 8-3 Warranty Card HRY1070 HRY1157 Not used
8-4 Owner’s Manual Not used Not used HRD0126
(2) CONTRAST TABLE
GM-X942/X1R/UC, EW and ES are constructed the same except for the following:
1 Screw Assy HEA0049
2 Screw BYC40P180FZK
3 Polyethylene Bag HEG0011
4 Polyethylene Bag HEG0022
5 Carton
See Contrast table(2)
6 Contain Box
See Contrast table(2)
7 Protector HHP0077
8-1 Owner’s Manual
See Contrast table(2)
* 8-2 Warranty Card
See Contrast table(2)
8-3 Owner’s Manual See Contrast table(2)
Mark No. Description Part No. Mark No. Description Part No.
(1) PACKING SECTION PARTS LIST(GM-X742/X1R/UC, EW, ES)
Part No.
Mark No. Symbol and Description GM-X742/X1R/UC GM-X742/X1R/EW GM-X742/X1R/ES
5 Carton HHG0232 HHG0233 HHG0234
6 Contain Box HHL0232 HHL0233 HHL0234
8-1 Owner’s Manual HRD0123 HRD0124 HRD0125
* 8-2 Warranty Card HRY1070 HRY1157 Not used
8-3 Owner’s Manual Not used Not used HRD0126
(2) CONTRAST TABLE
GM-X742/X1R/UC, EW and ES are constructed the same except for the following:
- Owner's Manual
Model Part No. Language
GM-X942/X1R/UC HRD0123 English, French
GM-X742/X1R/UC
GM-X942/X1R/EW HRD0124 English, Spanish, German,
GM-X742/X1R/EW French, Italian, Dutch
GM-X942/X1R/ES HRD0125 English, Spanish
GM-X742/X1R/ES HRD0126 Portuguese(B), Arabic
4
GM-X942,X742
2.2 EXTERIOR(GM-X942/X1R/UC, EW, ES)
GM-X942,X742
1 Screw BSZ30P050FZK
2 Screw(M3x6) CBA1320
3 Screw(M3x12) CBA1323
4 Screw(M3x5) HBA0006
5 Screw(M3x8) HBA0011
6 Screw(M2.6x6) HBA0012
7 Panel
See Contrast table(2)
8 Case See Contrast table(2)
9 Heat Sink See Contrast table(2)
10 Plate HNS0077
11 Plate HNS0081
12 Spacer HNV0016
13 Amp Unit
See Contrast table(2)
14 Screw BBZ30P060FMC
15 Screw(M3x14) CBA1382
16 Terminal(CN902) CKF1059
17 Fuse(30A) HEK0030
18 Pin Jack(CN851) HKB0002
19 Pin Jack(CN852) HKB0002
20 Fuse Holder HKE0012
21 Terminal(CN901) HKE0020
22 Terminal(CN651) HKE0021
23 Terminal(CN652) HKE0021
24 Clip HNC0054
25 Buss Bar HNC0064
26 Buss Bar HNC0065
27 Heat Sink HNR0115
28 Heat Sink HNR0116
29 Bar HNR0124
30 Screw PPZ30P100SAD
31 Light Pipe Unit HXA0322
32 Screw PPZ30P100FZK
33 Thermistor(TH901, 902) CCX1013
34 Transistor(Q908) 2SB1566
35 Transistor(Q907) 2SD2395
36 Diode(D907) FML22S
37 Diode(D910) FML22R
38 FET(Q905, 906, 911, 912) STP50NE08
39 FET(Q563, 564, 565, 566) 94-4980
40 FET(Q567, 568, 569, 570) 94-4981
41 Transistor(Q573, 574) 2SC1845
42 Beads Core
See Contrast table(2)
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
5
Part No.
Mark No. Symbol and Description GM-X942/X1R/UC GM-X942/X1R/EW GM-X942/X1R/ES
7 Panel HNB0118 HNB0105 HNB0118
8 Case HNB0119 HNB0107 HNB0119
9 Heat Sink HNR0153 HNR0161 HNR0153
13 Amp Unit HWH0115 HWH0119 HWH0120
42 Beads Core Not used CTF1355 CTF1355
(2) CONTRAST TABLE
GM-X942/X1R/UC, EW and ES are constructed the same except for the following:
6
GM-X942,X742
2.3 EXTERIOR(GM-X742/X1R/UC, EW, ES)
GM-X942,X742
1 Screw BSZ30P050FZK
2 Screw(M3x6) CBA1320
3 Screw(M3x12) CBA1323
4 Screw(M3x5) HBA0006
5 Screw(M3x8) HBA0011
6 Screw HBA0012
7 Panel
See Contrast table(2)
8 Case See Contrast table(2)
9 Heat Sink See Contrast table(2)
10 Plate HNS0077
11 Plate HNS0081
12 Spacer HNV0016
13 Amp Unit
See Contrast table(2)
14 Screw BBZ30P060FMC
15 Screw BMS30P080FMC
16 Screw CBA1382
17 Terminal(CN902) CKF1059
18 Fuse HEK0030
19 Pin Jack(CN851) HKB0002
20 Pin Jack(CN852) HKB0002
21 Fuse Holder HKE0012
22 Terminal(CN901) HKE0020
23 Terminal(CN651) HKE0021
24 Terminal(CN652) HKE0021
25 Clip HNC0054
26 Heat Sink HNR0117
27 Heat Sink HNR0118
28 Bar HNR0124
29 Screw PPZ30P100SAD
30 Light Pipe Unit HXA0322
31 Screw PPZ30P100FZK
32 Thermistor(TH901, 902) CCX1013
33 FET(Q565, 566) 94-4980
34 FET(Q567, 568) 94-4981
35 Transistor(Q573, 574) 2SC1845
36 FET(Q905, 906, 911, 912) IRFIZ44N
37 Diode(D907) FML22S
38 Diode(D910) FML22R
39 Transistor(Q907) 2SD2395
40 Transistor(Q908) 2SB1566
41 Beads Core
See Contrast table(2)
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
7
Part No.
Mark No. Symbol and Description GM-X742/X1R/UC GM-X742/X1R/EW GM-X742/X1R/ES
7 Panel HNB0118 HNB0105 HNB0118
8 Case HNB0120 HNB0108 HNB0120
9 Heat Sink HNR0154 HNR0162 HNR0154
13 Amp Unit HWH0121 HWH0116 HWH0122
41 Beads Core Not used CTF1355 CTF1355
(2) CONTRAST TABLE
GM-X742/X1R/UC, EW and ES are constructed the same except for the following:
8
GM-X942,X742
1
23
4
1
234
D
C
B
A
3. SCHEMATIC DIAGRAM
3.1 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)(GM-X942/X1R/UC, EW, ES)
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS
LIST”.
A-a
A-b
A-b
A-a
A
A-a
20kΩ(E)
CCS1266
20kΩ(E)
CCS1266
ISOLATOR CIRCUIT
GAIN=1
HP/LP FILTER
40-120Hz
12dB/OCTAVE
POWER SUPPLY
AMP UNIT
CN851
CN851
CN852
CN852
A
Large size
A-a A-b
SCH diagram
A-a
A-b
Guide page
A-a
Detailed page
A-b
9
GM-X942,X742
5
6
78
5
6
7
8
D
C
B
A
A-b
A
HZS5(C3)HZS5(C3)
SML210LT(LMN)
HEK0030
HEK0030
94-4980
94-4980
94-4980
94-4980
94-4981
94-4981
94-4981
94-4981
20kΩ(C)
50kΩ(C)
10kΩ(A)
10kΩ(B)
CCP1319
10kΩ(B)
CCP1319
BASS BOOST
40-120Hz
0-18dB/OCTAVE
AMP
GAIN=9.7-34dB
CN651
CN652
CN901
GM-X942/X1R/EW, ES
1M
10
GM-X942,X742
1
23
4
1
234
D
C
B
A
A-a
A-a
A-b
20kΩ(E)
CCS1266
20kΩ(E)
CCS1266
ISOLATOR CIRCUIT
GAIN=1
HP/LP FILTER
40-120Hz
12dB/OCTAVE
AMP UNIT
CN851
CN851
CN852
CN852
A
1
11
GM-X942,X742
5
6
78
5
6
7
8
D
C
B
A
A-a
A-a
A-b
POWER SUPPLY
2
12
GM-X942,X742
1
23
4
1
234
D
C
B
A
A-a
A-b
A-b
HZS5(C3)HZS5(C3)
94-4980
94-4980
94-4980
94-4980
94-4981
94-4981
94-4981
94-4981
20kΩ(C)
50kΩ(C)
10kΩ(A)
10kΩ(B)
CCP1319
10kΩ(B)
CCP1319
BASS BOOST
40-120Hz
0-18dB/OCTAVE
AMP
GAIN=9.7-34dB
CN651
CN652
1
13
GM-X942,X742
5
6
78
5
6
7
8
D
C
B
A
A-b
A-a
A-b
SML210LT(LMN)
HEK0030
HEK0030
94-498194-4981
CN901
GM-X942/X1R/EW, ES
1M
2
14
GM-X942,X742
1
23
4
1
234
D
C
B
A
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)(GM-X742/X1R/UC, EW, ES)
A
A-a
100/16 100/16
20KΩ(E)
20KΩ(E)
20KΩ(C)
50KΩ(C)
ISOLATOR CIRCUIT
GAIN=1
AMP UNIT
A
HP/LP FILTER
40-120Hz
12dB/OCTAVE
B
4
0
POWER SUPPLY
CN851
CN852
CN852
CN851
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