Pioneer GM-X422 User manual

ORDER NO.
CRT2167
Se r v i c e
M a nu a l
BRIDGEABLE 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-X422 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..........................................................14
7. GENERAL INFORMATION .......................................15
7.1 DISASSEMBLY ...................................................15
8. OPERATIONS AND SPECIFICATIONS.....................16
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-X322 X1R/UC

2
GM-X422, GM-X322
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 HEG0010
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 HRY1070
* 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

3
GM-X422, GM-X322
(2) CONTRAST TABLE
GM-X422/X1R/UC, GM-X422/X1R/ES, GM-X422/X1R/EW and GM-X322/X1R/UC are constructed the same except for the
following:
Part No.
GM-X422 GM-X322
Mark No. Symbol and Description X1R/UC X1R/ES X1R/EW X1R/UC
1 Contain Box HHL0134 HHL0135 HHL0136 HHL0133
2 Carton HHG0134 HHG0135 HHG0136 HHG0133
7 Terminal(x8) HKC0001 HKC0003 HKC0003 HKC0003
8 Cord Assy Not used HDE4419 HDE4419 Not used
9-1 Owner’s Manual HRD0048 HRD0045 HRD0047 HRD0046
9-2 Owner’s Manual Not used HRD0049 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-X422/X1R/UC HRD0048 English, French
GM-X422/X1R/ES HRD0045 English, Spanish
HRD0049 Arabic, Portuguese(B)
GM-X422/X1R/EW HRD0047 English, French, German, Dutch, Spanish, Italian
GM-X322/X1R/UC HRD0046 English, French

4
GM-X422, GM-X322
2.2. EXTERIOR
Fig. 2

5
GM-X422, GM-X322
1 Screw BSZ30P050FZK
2 Screw(M3x6) CBA1320
3 Screw(M3x12) CBA1323
4 Screw CBA1382
5 Screw HBA0006
6 Cord Assy See Contrast table (2)
7 Fuse(15A) See Contrast table (2)
8 Ground Wire(Black) See Contrast table (2)
9 Holder CNC5399
10 Panel See Contrast table (2)
11 Case HNB0016
12 Panel See Contrast table (2)
13 Spacer HNM0026
14 Heat Sink See Contrast table (2)
15 Spacer HNV3975
16 Amp Unit See Contrast table (2)
17 Screw BMS30P060FZK
18 Screw BMS30P080FMC
19 Plug(CN855) CKS1618
20 Clamper HNV0006
21 Connector(CN853) HDE4418
22 Cord(CN551) HDE4610
23 Fuse(20A) HEK0020
24 Heat Sink(Sub Heat Sink) HNR0053
25 Heat Sink(Sub Heat Sink) HNR0054
26 Pin Jack(CN851) See Contrast table (2)
27 Terminal(CN901) See Contrast table (2)
28 Terminal(CN651) See Contrast table (2)
29 Holder HNC0006
30 Screw PPZ30P060FZK
31 Plate Unit See Contrast table (2)
32 •••••
33 Transistor(Q561,562) 2SD2438
34 Transistor(Q563,564) 2SB1587
35 Transistor(Q555,556) 2SD2343
36 Thermistor(TH901) CCX1013
37 FET(Q905,906) IRFIZ44N
38 Diode(D907) ESAC25M-02C
39 Diode(D910) ESAC25M-02N
40 System Remote Control See Contrast table (2)
41 Badge Unit See Contrast table (2)
42 Light Pipe Unit HXA0182
43 Special Red Battery Wire See Contrast table (2)
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
(2) CONTRAST TABLE
GM-X422/X1R/UC, GM-X422/X1R/ES, GM-X422/X1R/EW and GM-X322/X1R/UC are constructed the same except for the
following:
Part No.
GM-X422 GM-X322
Mark No. Symbol and Description X1R/UC X1R/ES X1R/EW X1R/UC
6 Cord Assy Not used HDE4453 HDE4453 Not used
7 Fuse(15A) Not used HEK0015 HEK0015 Not used
8 Ground Wire(Black) Not used HDE4455 HDE4455 Not used
10 Panel HNB0055 HNB0073 HNB0056 HNB0058
12 Panel HNB0050 HNB0072 HNB0072 HNB0051
14 Heat Sink HNR0092 HNR0099 HNR0099 HNR0096
16 Amp Unit HWH0059 HWH0057 HWH0056 HWH0058
26 Pin Jack(CN851) HKB0006 HKB0005 HKB0005 HKB0003
27 Pin Jack(CN901) HKE0002 HKE0001 HKE0001 HKE0001
28 Pin Jack(CN651) HKE0008 HKE0007 HKE0003 Not used
31 Plate Unit HXA0166 HXA0163 HXA0163 HXA0163
40 System Remote Control Not used HDE0007 HDE0007 Not used
41 Badge Unit HXA0168 HXA0164 HXA0164 HXA0164
43 Special Red Battery Wire Not used HDE4454 HDE4454 Not used

6
GM-X422, GM-X322
A
1234
B
C
D
1234
3. SCHEMATIC DIAGRAM
Note: When ordering service parts, be sure to refer to "EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS
LIST".
MOTHER PCB
A
ISOLATOR PCB
B
UC and ES models only
C851, 852
UC, ES : 100P
EW : 470P
R469
R470
22k
22k
R469, 470 : GM-X322 only
VR452 : GM-X422 only
10/50
10/50
4R7/50
4R7/50
SPEAKER INPUT LEVEL
LPF / HPF
BASS BOOST
+15 REGULATOR
-15
REGULATOR
SWITCHING REGULATOR
THERMO-DETECTION
MUTE
L
R
R
L
AMP UNIT
Consists of
MOTHER PCB
ISOLATOR PCB
: AUDIO SIGNAL
SIGNAL ROUTE
A
B

7
GM-X422, GM-X322
5678
A
B
C
D
5678
ES and EW
models only
ES and EW
models only
22/50
MUTE
BUFFER AMP
PRE DRIVER POWER AMP
OVER CURRENT
DETECTOR
OVER VOLTAGE
PROTECTOR
SWITCHING
CONTROL
POWER CONTROL / MUTE
OVER CURRENT
DETECTOR
HEK0015 15A
GROUND WIRE
BATTERY WIRE
SYSTEM REMOTE
CONTROL
Fig. 3
A

8
GM-X422, GM-X322
A
1234
B
C
D
1234
4. PCB CONNECTION DIAGRAM
A
G
G
CORD ASSY
A
MOTHER PCB
Capacitor
Connector
P.C.Board Chip Part
SIDE A
SIDE B
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

9
GM-X422, GM-X322
5678
A
B
C
D
5678
Fig. 4
B
A
SIDE A
OUT IN
B
ISOLATOR PCB

10
GM-X422, GM-X322
A
1234
B
C
D
1234
A
B
B
ISOLATOR PCB
A
MOTHER PCB

11
GM-X422, GM-X322
5678
A
B
C
D
5678
Fig. 5
A
SIDE B

GM-X422/X1R/UC
AMP UNIT
Consists of
MOTHER PCB
ISOLATOR PCB
Unit Number : HWH0059
Unit Name : Amp Unit
MISCELLANEOUS
IC 121 IC UPC4570HA
IC 123 IC UPC4570HA
IC 451 IC UPC4570HA
IC 551 IC UPC4570C
IC 651 IC TA8194Z
IC 851 IC UPC4570C
IC 852 IC UPC4570C
IC 901 IC UPC494C
Q 451 Transistor 2SC2712
Q 452 Transistor 2SC2712
Q 551 Transistor 2SA1145
Q 552 Transistor 2SA1145
Q 553 Transistor 2SC2705
Q 554 Transistor 2SC2705
Q 555 Transistor 2SD2343
Q 556 Transistor 2SD2343
Q 561 Transistor 2SD2438
Q 562 Transistor 2SD2438
Q 563 Transistor 2SB1587
Q 564 Transistor 2SB1587
Q 651 Transistor 2SD1768S
Q 652 Transistor 2SD1768S
Q 653 Chip Transistor 2SA1162
Q 654 Transistor 2SC2458
Q 655 Transistor 2SC2458
Q 656 Transistor 2SC2458
Q 657 Transistor 2SA1048
Q 658 Transistor 2SC2458
Q 659 Transistor 2SA1048
Q 660 Transistor 2SB1243
Q 661 Transistor 2SC2712
Q 662 Transistor 2SC2712
Q 663 Chip Transistor 2SA1162
Q 901 Transistor 2SC2458
Q 902 Transistor 2SA1048
Q 903 Transistor 2SA1048
Q 904 Transistor 2SA1048
Q 905 FET IRFIZ44N
Q 906 FET IRFIZ44N
Q 907 Transistor 2SD1864
Q 908 Transistor 2SB1243
D 651 Diode 1SS133
D 652 Diode 1SS133
D 653 Diode 1SS133
D 654 Diode HZS7L(B2)
D 655 Diode 1SS133
D 656 Diode HZS7L(A2)
D 657 Diode 1SS133
D 658 Diode 1SS133
D 901 LED BR4361F
D 902 Diode ERA15-02VH
D 903 Diode ERA15-02VH
D 904 Diode HZS18L(3)
D 905 Diode 1SS133
D 906 Diode 1SS133
D 907 Diode ESAC25M-02C
D 908 Diode HZS16L(1)
D 909 Diode HZS16L(1)
D 910 Diode ESAC25M-02N
D 911 Diode 1SS133
L 851 Ferri-Inductor CTF1007
L 852 Ferri-Inductor CTF1007
L 901 Choke Coil 50H CTH1142
T 901 Transformer CTT1034
TH 901 Thermistor CCX1013
TH 902 Thermistor CCX1035
S 101 Switch CSH1029
VR 451 Volume 10kΩ(C) CCS1240
VR 452 Volume 50kΩ(C) CCS1242
VR 453 Volume 10kΩ(A) CCS1241
EF 902 Capacitors CCG-081
EF 903 Capacitors CCG-081
RESISTORS
R 121 RS1/10S153J
R 122 RS1/10S153J
R 125 RS1/10S153J
R 126 RS1/10S153J
R 129 RS1/10S123J
R 130 RS1/10S123J
R 131 RS1/10S153J
R 132 RS1/10S153J
R 133 RS1/10S223J
R 134 RS1/10S223J
R 137 RS1/10S222J
R 138 RS1/10S222J
R 141 RS1/10S222J
R 142 RS1/10S222J
R 145 RS1/10S222J
R 146 RS1/10S222J
R 451 RS1/10S473J
R 452 RS1/8S473J
R 453 RS1/10S432J
R 454 RS1/10S432J
12
GM-X422, GM-X322
5. ELECTRICAL PARTS LIST
NOTE:
-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.....
=====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- ------------------------- =====Circuit Symbol and No.===Part Name Part No. --- ------ --------------------------------------------- -------------------------
A
B

R 455 RS1/10S182J
R 456 RS1/10S182J
R 457 RD1/4PU221J
R 458 RD1/4PU221J
R 459 RS1/10S822J
R 460 RS1/10S822J
R 461 RS1/10S221J
R 462 RS1/10S221J
R 463 RD1/4PU222J
R 464 RD1/4PU222J
R 465 RS1/8S181J
R 466 RS1/10S181J
R 501 RD1/4PU221J
R 502 RD1/4PU221J
R 551 RS1/10S222J
R 552 RS1/10S222J
R 555 RS1/10S822J
R 556 RS1/10S822J
R 557 RS1/10S471J
R 558 RS1/10S471J
R 559 RS1/10S223J
R 560 RS1/10S223J
R 561 RS1/10S153J
R 562 RD1/4PU153J
R 563 RS1/10S153J
R 564 RD1/4PU153J
R 565 RD1/4PU561J
R 566 RD1/4PU561J
R 567 RD1/4PU561J
R 568 RD1/4PU561J
R 569 RD1/4PU473J
R 570 RD1/4PU473J
R 571 RD1/4PU473J
R 572 RD1/4PU473J
R 573 RD1/4PU161J
R 574 RD1/4PU161J
R 575 RD1/4PU161J
R 576 RD1/4PU161J
R 577 RD1/4PU562J
R 578 RD1/4PU562J
R 579 RD1/4PU222J
R 580 RD1/4PU222J
R 581 RD1/4PU473J
R 582 RD1/4PU473J
R 583 RD1/4PU473J
R 584 RD1/4PU473J
R 589 0.22ΩCCN1013
R 590 0.22ΩCCN1013
R 591 0.22ΩCCN1013
R 592 0.22ΩCCN1013
R 593 0.22ΩCCN1013
R 594 0.22ΩCCN1013
R 595 0.22ΩCCN1013
R 596 0.22ΩCCN1013
R 597 RS1/2PMF100J
R 598 RS1/2PMF100J
R 651 RD1/4PU393J
R 652 RD1/4PU393J
R 653 RD1/4PU564J
R 654 RD1/4PU564J
R 655 RD1/4PM473J
R 656 RD1/4PM473J
R 657 RS1/10S104J
R 658 RS1/10S472J
R 659 RS1/10S103J
R 660 RD1/4PU222J
R 661 RS1/10S472J
R 662 RD1/4PU221J
R 663 RS1/10S103J
R 664 RD1/4PU473J
R 665 RD1/4PU103J
R 666 RD1/4PU103J
R 667 RD1/4PU222J
R 668 RD1/4PU472J
R 669 RD1/4PU101J
R 670 RS1/10S104J
R 671 RS1/10S221J
R 672 RD1/4PU152J
R 673 RD1/4PU472J
R 674 RS1/10S472J
R 676 RD1/4PU222J
R 678 RS1/10S103J
R 680 RS1/10S223J
R 681 RS1/10S223J
R 682 RS1/8S102J
R 851 RS1/8S471J
R 852 RS1/8S471J
R 853 RS1/10S223J
R 854 RS1/10S223J
R 855 RN1/10SE1002D
R 856 RN1/10SE1002D
R 857 RN1/10SE1002D
R 858 RN1/10SE1002D
R 859 RN1/10SE1002D
R 860 RN1/10SE1002D
R 861 RN1/10SE1002D
R 862 RN1/10SE1002D
R 864 RS1/10S104J
R 868 RS1/10S104J
R 869 RD1/4PU473J
R 872 RD1/4PU473J
R 901 RS1/2PMF561J
R 902 RS1/2PMF220J
R 903 RD1/4PU102J
R 904 RD1/4PU102J
R 905 RS1/10S472J
R 906 RS1/10S103J
R 907 RS1/10S183J
R 908 RD1/4PU100J
R 909 RD1/4PU100J
R 910 RS1/10S153J
R 911 RS1/10S102J
R 912 RD1/4PU272J
R 913 RS1/10S472J
R 914 RS1/10S472J
R 915 RS1/10S472J
R 916 RD1/4PU332J
R 917 RD1/4PU332J
R 918 RD1/4PU220J
R 919 RD1/4PU220J
R 920 RD1/4PU472J
R 921 RD1/4PU472J
R 922 RD1/4PU101J
R 923 RD1/4PU101J
R 924 RS1/2PMF560J
R 925 RD1/4PU560J
R 927 RS1/2PMF561J
R 928 RS1/2PMF220J
R 929 RD1/4PU272J
R 930 RD1/4PU221J
13
GM-X422, GM-X322
=====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- ------------------------- =====Circuit Symbol and No.===Part Name Part No. --- ------ --------------------------------------------- -------------------------

CAPACITORS
C 121 CKSYB474K16
C 122 CKSYB474K16
C 125 CKSQYB273K25
C 126 CKSQYB273K25
C 129 CFTNA124J50
C 130 CFTNA124J50
C 131 CKSYB184K16
C 132 CKSYB184K16
C 133 CFTNA124J50
C 134 CFTNA124J50
C 451 CCSQCH330J50
C 452 CCSQCH330J50
C 453 CEAS4R7M50
C 454 CEAS4R7M50
C 455 CKSYB224K25
C 456 CKSYB224K25
C 457 CKSQYB473K25
C 458 CKSQYB473K25
C 551 CKSYB104K25
C 552 CKSYB104K25
C 553 CEAS101M10
C 554 CEAS101M10
C 555 CCSQCH680J50
C 556 CCSQCH680J50
C 559 CCSQCH220J50
C 560 CCSQCH220J50
C 561 CCPUSL330J50
C 562 CCPUSL330J50
C 563 CCPUSL330J50
C 564 CCPUSL330J50
C 565 CCSQCH220J50
C 566 CCSQCH220J50
C 567 CFTNA224J50
C 568 CFTNA224J50
C 569 CFTNA224J50
C 570 CFTNA224J50
C 571 CFTNA223J50
C 572 CFTNA223J50
C 573 CFTNA333J50
C 574 CFTNA333J50
C 651 220µF/10V CCH1036
C 652 470µF/16V CCH1183
C 653 CEAS470M16
C 654 CEAS220M50
C 655 CFTNA103J50
C 656 CKSQYB103K50
C 657 CKSQYB103K50
C 658 CKSQYB103K50
C 659 470µF/16V CCH1183
C 851 CCSQCH101J50
C 852 CCSQCH101J50
C 853 CEAL100M16
C 854 CEAL100M16
C 855 CKSQYB472K50
C 856 CKSQYB472K50
C 857 CCSQCH470J50
C 858 CCSQCH470J50
C 859 CCSQCH470J50
C 860 CCSQCH470J50
C 861 CEAS100M50
C 862 CEAS100M50
C 863 CKSQYB103K50
C 864 CKSQYB103K50
C 901 CEAS1R0M50
C 902 CEAS221M10
C 903 CEAS2R2M50
C 904 CEAS1R0M50
C 905 CQMA472J50
C 906 CQMA472J50
C 907 3300µF/16V CCH1130
C 908 3300µF/35V CCH1200
C 909 3300µF/35V CCH1200
C 910 CEAS101M35
C 911 CEAS101M35
C 912 CEAS100M50
C 913 CEAS100M50
C 914 CQMA102J50
C 915 CQMA102J50
C 916 CFTNA224J50
C 917 CQMA102J50
C 918 CKSYB103K50
14
GM-X422, GM-X322
=====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- ------------------------- =====Circuit Symbol and No.===Part Name Part No. --- ------ --------------------------------------------- -------------------------
6. ADJUSTMENT
There is no information to be shown in this chapter.
GM-X422/X1R/UC, GM-X422/X1R/ES, GM-X422/X1R/EW and GM-X322/X1R/UC are constructed the same except for the
following:
-Amp Unit
Part No.
Symbol and Description GM-X422/X1R/UC GM-X422/X1R/ES GM-X422/X1R/EW GM-X322/X1R/UC
S901 Switch Not used HSH-156 HSH-156 Not used
VR452 Volume 50kΩ(C) CCS1242 CCS1242 CCS1242 Not used
R469, 470 Not used Not used Not used RS1/10S223J
R869, 872 RD1/4PU473J RD1/4PU473J Not used RD1/4PU473J
R926 Not used RD1/4PU105J RD1/4PU105J Not used
C851, 852 CCSQCH101J50 CCSQCH101J50 CKSQYB471K50 CCSQCH101J50
C861, 862 CEAS100M50 CEAS100M50 Not used CEAS100M50

15
GM-X422, GM-X322
7. GENERAL INFORMATION
7.1 DISASSEMBLY
A
A
B
B
C
C
Panel
Case
Sub Heat Sink
Sub Heat Sink
Heat Sink
Amp Unit
-Removing the Amp Unit
Some silicone glue has been applied between the
Heat sink and the Sub Heat Sink. therefore, to
remove the Amp Unit from the Heat Sink.
1. Remove four screws B and Three screws C.
2. Use 2 pcs. of screw B and insert them into the two
holes marked with an arrow.
3. Alternately tighten them little by little until the Sub
Heat Sink separates from the Heat Sink.
-Removing the Case and Panel
1. Remove six screws A, and then remove case.
2. Remove panel.
Fig. 6
Fig. 7

GM-X422, GM-X322
8. OPERATIONS AND SPECIFICATIONS
-SETTING THE UNIT
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of the speaker that is connected to the speaker output connector and the car stereo system:
LPF/HPF Select Audio frequency range Speaker Remarks Switch to be output Type LPF (left) Very-low-frequency range Sub-woofer Connect a sub-woofer. OFF (center) Full range Full range HPF (right) Low-frequency range to Tweeter If you want to cut the very-
high-frequency range low-frequency range
because it is not necessary for the speaker you use.
Gain Control
If the sound is too low, even when the volume of the car stereo used along with this power amplifier is turned up, turn gain control on the back of the power amplifier clockwise. If the sound dis- torts when the volume is turned up, turn the gain control counter-clockwise. • Set the gain control to “NORMAL” when
this amplifier is connected to a Pioneer car stereo with RCA output jacks. If the sound is too low or distorts, adjust the gain con-
trol.
Power Indicator
The power indicator lights when the power is switched on.
Bass Boost Level Control Bass boost level control can boost the level around the frequency selected by the bass boost frequency control to 0 to 12 dB.
Bass Boost Frequency Control (GM-X422)
You can select a bass boost frequency from 40 to 120 Hz with the bass boost control. • Bass Boost Level Control, Bass Boost
Frequency Control can be adjusted only when the LPF/HPF select switch is set to a
position other than HPF.
BFC (Beat Frequency Control)
Switch
(ES and EW models)
If you hear a beat while listening to an AM broadcast with your car stereo, change the BFC switch using a small
screwdriver.
16
Fig. 8

17
GM-X422, GM-X322
Fuse (30 A)
Grommet
RCA input
Special red battery wire [RD-222] (sold separately). After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Ground wire (black) [RD-222] (sold separately). Connect to metal body or chassis.
Amplifier with RCA input jacks
Fuse (20 A)
Car stereo with RCA output jacks
External Output
Connecting wires with RCA pin plugs (sold separately).
RCA input jack
RCA output jack
Speaker terminal See the “Connecting the Speaker wires” section for speaker connection instructions. Blue
Connect the male terminal of this wire to the blue wire of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch.
-CONNECTION DIAGRAM (1) GM-X422/X1R/UC
Fuse (30 A)
Grommet
RCA input
Special red battery wire After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Ground wire (black) Connect to metal body or chassis.
Amplifier with RCA input jacks
Fuse (20 A)
Car stereo with RCA output jacks
External Output
Connecting wires with RCA pin plugs (sold separately).
RCA input jack
RCA output jack
Speaker output terminal See the “Connecting the Speaker wires” section for speaker connection instructions.
Blue Connect the male terminal of this wire to the blue wire of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch.
(2) GM-X422/X1R/ES, GM-X422/X1R/EW
Fig. 9
Fig. 10

18
GM-X422, GM-X322
Fuse (30 A)
Grommet Special red battery wire [RD-222] (sold separately).
After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Ground wire (black) [RD-222] (sold separately). Connect to metal body or chassis.
Fuse (20 A)
Car stereo with RCA output jacks
External Output
Connecting wires with RCA pin plugs (sold separately).
RCA input jack
Speaker terminal See the “Connecting the Speaker wires” section for speaker connection instructions. Blue
Connect the male terminal of this wire to the blue wire of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch.
• Be sure to use the special red battery wire
supplied with the amplifier and connect directly to the battery. Use the supplied black ground wire and connect to the vehicle body.
1. Pass the battery wire from the
engine compartment to the interior of the vehicle. • After making all other connections to the
amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery.
2. Connect the wires to the terminal.
• Fix the wires securely with the terminal
screws.
1. Expose the end of the speaker wires
by about 10 mm and twist it using nippers or a cutter.
2. Attach lugs to speaker wire ends.
• Use pliers, etc., to crimp lugs to wires.
3. Connect the speaker wires to the
speaker terminals. • Fix the speaker wires securely with the termi-
nal screws.
UC and ES models: EW model:
10 mm
Fuse (30A)
Engine compart- ment Interior of
the vehicle
Drill an 8-mm hole into the vehicle body.
Insert the O-ring rubber grommet into the vehicle body.
Positive terminal
GND terminal
Power terminal
Battery wire
System remote control terminal
System remote control wire (Blue)
Ground wire
Twist
Speaker output terminal Speaker wire
Terminal screw
Speaker wire
Lug
Speaker output terminal Speaker wire
Terminal screw
Speaker input terminal
(3) GM-X322/X1R/UC
-CONNECTING
THE POWER TERMINAL
-CONNECTING
THE SPEAKER TERMINALS
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17

GM-X422, GM-X322
The speaker output mode can be two-chan- nel (stereo), one-channel (mono), or three- channel (stereo + mono). To connect the speaker leads to suit the mode. Connect the speakers according to figures on the fol- lowing pages. • When connecting to the speaker input, do not
connect the RCA output.
• When connecting to the RCA input, do not
connect the speaker input.
Two-channel mode (stereo) One-channel mode (mono) Three-channel mode (stereo + mono)
The power amplifier is basically a two- channel/one-channel bridgeable amplifier, but three channels can be achieved by combining the stereo and mono modes using inductors and capacitors.
Three-channel mode, two-way system Three-channel mode, three-way system
• The inductor (L1 or L2 in the diagram)
acts as a low-pass filter. The capacitor (C1 or C2 in the diagram) acts as a high- pass filter. The inductor (L) shall be used on the woofer/sub-woofer, and that a capacitor (C) shall be used on the high/mid-high.
• Remember when bridging an amplifier it
will see only half of the original speaker impedance. Therefore, you must use speakers that have ratings of 4 ohms or higher. If you use speakers that have lower impedance ratings it may cause damage to the amplifier.
• When the inductors and capacitors are
connected to the speaker wires, secure or solder them so they cannot be pulled loose. Tape or use heat shrink on the joints to prevent short circuits.
C2 C2
L1
L2 L2
C1
C1 C1
L1
(Right) Speaker input (Left) (Left) Speaker (Right)
(Right) Speaker input (Left) Speaker (Mono)
Mid-high (Left) Woofer (Mono) Mid-high (Right) High/mid-high (Left) Mid/mid-bass (Left) Woofer/sub-woofer (Mono) Mid/mid-bass (Right) High/mid-high (Right)
19
-CONNECTING THE SPEAKER WIRES (1) GM-X422/X1R/UC, GM-X322/X1R/UC
The speaker output mode can be two-channel (stereo), one-channel (mono). To connect the speaker leads to suit the mode. Connect the speakers according to figures on the following pages. • When connecting to the speaker input, do not connect the RCA output. • When connecting to the RCA input, do not connect the speaker input.
Two-channel mode (stereo) One-channel mode (mono)
(Right) Speaker input (Left) (Left) Speaker (Right)
(Right) Speaker input (Left) Speaker (Mono)
(2) GM-X422/X1R/ES
The speaker output mode can be two-channel (stereo), one-channel (mono). To connect the speaker leads to suit the mode. Connect the speak- ers according to figures on the following pages.
Two-channel mode (stereo) One-channel mode (mono)
(Left) Speaker (Right)
Speaker (Mono)
(3) GM-X422/X1R/EW
Fig. 18
Fig. 19
Fig. 20
Fig. 21
Fig. 22 Fig. 23
Fig. 24 Fig. 25

GM-X422, GM-X322
Power source .............................................................................................................. 14.4 V DC (10.8 — 15.1 V allowable) Grounding system ............................................................................................................................................ Negative type Current consumption ........................................................................................................ 12.5 A (at continuous power, 4 Ω) Average current drawn* ............................................................................................................ 3.5 A (4 Ωfor two channels)
6.0 A (4 Ωfor one channels)
Fuse .................................................................................................................................................................................. 20 A Dimensions ........................................................................................................................ 216 (W) ×52 (H) ×175 (D) mm
[8-1/2 (W) ×2-1/8 (H) ×6-7/8 (D) in.]
Weight ........................................................................................................ 2.1 kg (4.7 lbs.) (Leads for wiring not included) Maximum power output .......................................................................................................... 70 W ×2 / 160 W ×1 (EIAJ)
Continuous power output (UC and ES models) ........................ 35 W ×2 (at 14.4V, 4 Ω, 20 — 20,000 Hz, 0.08% THD)
80 W ×1 (at 14.4V, 4 Ω, 20 — 20,000 Hz, 0.8% THD) 50 W ×2 (at 14.4V, 2 Ω, 20 — 20,000 Hz, 0.8% THD)
Continuous power output (EW model) ...................................................... 55 W ×2 / 125 W ×1 (DIN45324, +B=14.4 V) Load impedance ............................................................................................................................ 4 Ω(2 — 8 Ωallowable)
(Bridge connection: 4 — 8 Ωallowable)
Frequency response ............................................................................................................ 10 — 50,000 Hz (+0 dB, –1 dB) Signal-to-noise ratio (UC and ES models) .................................................................................... 105 dB (IHF–A network) Signal-to-noise ratio (EW model) .................................................................................................. 105 dB (IEC–A network) Distortion ............................................................................................................................................ 0.004% (10 W, 1 kHz) Separation ........................................................................................................................................................ 60 dB (1 kHz) Low pass filter ................................................................................................................................ Cut off frequency: 80 Hz
Cut off slope: –18 dB/oct
High pass filter ................................................................................................................................ Cut off frequency: 80 Hz
Cut off slope: –12 dB/oct
Bass boost (GM-X422) .................................................................................................................. Frequency: 40 — 120 Hz
Gain: 0 — 12 dB
Bass boost (GM-X322) .............................................................................................................................. Frequency: 60 Hz
Gain: 0 — 12 dB
Input level / impedance .................................................................................................................. RCA: 0.4 — 4 V / 22 kΩ
Speaker (UC and ES models): 1.6 — 10 V / 40 kΩ
Note: • Specifications and the design are subject to possible modification without notice
due to improvements.
*Average current drawn • The average current drawn is nearly the maximum current drawn by this unit
when an audio signal is input. Use this value when working out total current drawn by multiple power amplifiers.
-SPECIFICATIONS