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Service Manual

GM-X944/X1R/UC

ORDER NO.

CRT2483

BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER

GM-X944

X1R/UC,EW,ES

CONTENTS
1. 2. 3. 4. 5. SAFETY INFORMATION............................................2 EXPLODED VIEWS AND PARTS LIST ......................2 SCHEMATIC DIAGRAM.............................................6 PCB CONNECTION DIAGRAM................................12 ELECTRICAL PARTS LIST........................................18 6. ADJUSTMENT .........................................................24 7. GENERAL INFORMATION.......................................25 7.1 DISASSEMBLY ..................................................25 8. OPERATIONS AND SPECIFICATIONS ....................26

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. MAR. 2000 Printed in Japan

GM-X944

1. SAFETY INFORMATION
- GM-X944/X1R/UC
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

2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING

2

GM-X944

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.

- PACKING SECTION PARTS LIST
Mark No. 1 2 3 4 5 6 7 8-1 8-2 8-3 8-4 8-5 9 10 Description ····· Screw Polyethylene Bag Polyethylene Bag Carton Contain Box Protector Owner's Manual Owner's Manual Warranty Card Card PRC Cover Protector GM-X944/X1R/UC BYC40P180FZK HEG0011 HEG0021 HHG0248 HHL0248 HHP0079 HRD0138 Not used Not used ARY1048 HRY0012 HNS0101 HHP0096 Part No. GM-X944/X1R/EW BYC40P180FZK HEG0011 HEG0021 HHG0249 HHL0249 HHP0079 HRD0139 Not used HRY1157 Not used Not used HNS0101 HHP0096 GM-X944/X1R/ES BYC40P180FZK HEG0011 HEG0021 HHG0250 HHL0250 HHP0079 HRD0140 HRD0141 Not used Not used Not used HNS0101 HHP0096

* * *

- Owner's Manual
Model GM-X944/X1R/UC GM-X944/X1R/EW GM-X944/X1R/ES Part No. HRD0138 HRD0139 HRD0140 HRD0141 Language English, French English, Spanish, German, French, Italian, Dutch English, Spanish Portuguese(B), Arabic

3

GM-X944

2.2 EXTERIOR

4

GM-X944

(1) EXTERIOR SECTION PARTS LIST
Mark No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Description Screw Screw(M3x12) Screw(M3x5) Screw(M3x8) Screw(M2.6x6) Screw(M3x16) Panel Case Holder Heat Sink Plate Plate Cover Spacer Amp Unit Screw Screw(M3x14) Terminal(CN905) Plug(CN906) Connector(CN101) Connector(CN103) Fuse Pin Jack(CN852) Pin Jack(CN851) Fuse Holder Part No. BSZ30P050FZK CBA1323 HBA0006 HBA0011 HBA0012 HBA0020
See Contrast table(2) See Contrast table(2)

Mark No. 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Description Terminal(CN901) Connector(CN301) Clip Holder Bar Heat Sink Heat Sink Network Unit Connector(CN102) Connector(CN104) Clip Screw Light Pipe Unit Fan Motor Screw

Part No. HKE0020 HKE0030 HNC0054 HNC0076 HNR0124 HNR0148 HNR0149
See Contrast table(2)

HNC0078
See Contrast table(2)

CKS3145 CKS3145 HNC0054 PPZ30P100SAD HXA0322 HXM0001 PPZ30P100FZK

HNS0077 HNS0080 HNS0101 HNV0016
See Contrast table(2)

BBZ30P060FMC CBA1382 CKF1059 CKS1035 CKS3146 CKS3146 HEK0030 HKB0002 HKB0006 HKE0012

41 Thermistor(TH901, 902) CCX1013 42 Thermistor(TH904) CCX1027 43 FET 94-4981 (Q361, 362, 363, 364, 365, 366, 367, 368) 44 FET STP50NE08 (Q905, 906, 911, 912, 913, 914) 45 46 47 48 49 Transistor(Q907) 2SD2395 Diode(D910) FML22R Transistor(Q908) 2SB1566 Diode(D907) FML22S FET 94-4980 (Q353, 354, 355, 356, 357, 358, 359, 360) BBZ30P140FMC BBZ30P060FMC

50 Screw 51 Screw

(2) CONTRAST TABLE GM-X944/X1R/UC, EW and ES are constructed the same except for the following:
Mark No. 7 8 10 15 33 Description Panel Case Heat Sink Amp Unit Network Unit GM-X944/X1R/UC HNB0121 HNB0122 HNR0160 HWH0134 HWG0020 Part No. GM-X944/X1R/EW HNB0104 HNB0106 HNR0165 HWH0123 HWG0016 GM-X944/X1R/ES HNB0121 HNB0122 HNR0160 HWH0135 HWG0021

5

1

2

3

4

GM-X944

3. SCHEMATIC DIAGRAM
3.1 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)
Note: When ordering service parts, be sure to refer to "EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS LIST".
A

A-a

A
A-a A-b

AMP UNIT

ISOLATOR GAIN=1

B
CN101 CN102

HP/LP FILTER 12dB/OCTAVE

NETWORK PCB(A)

LOW XOVER 40-120Hz HIGH XOVER 3k-9kHz

BP FILTER LOW-X TO HIGH-X

NETWORK UNIT Consists of · NETWORK PCB · NETWORK PCB

Large size SCH diagram

CN851

A-a

A-b

Guide page

CN102-2

A-a

A-b

Detailed page

RCA OUT GAIN=1

CN851

B
CN851

ISOLATOR GAIN=1

CN101-2

CN851

CN104-2

CN852

CN852

C

C

NETWORK PCB(B)

HP/LP FILTER 12dB/OCTAVE

LOW XOVER 40-120Hz HIGH XOVER 3k-9kHz

POWER SUPPLY

D
FAN MOTOR HXM0001

6

A B C
1

2

3

4

CN103-2

CN103

CN104

5

6

7

8

GM-X944

A-b
IT CB(A) CB(B) AMP GAIN=8.5-33dB

A

CN301

B

AMP GAIN=8.5-33dB

CN301

C

GM-X944/X1R/EW, ES

CN904

CN903 CN902

CN901

D
220

CN906

HZS12L(A3)

5

6

7

A

7 8

B A

D C

8

A-a A-b

GM-X944

CN101

CN102

CN102-2

RCA OUT GAIN=1

CN851

CN101-2

CN103

CN104

CN104-2

CN103-2

A-a B C
ISOLATOR GAIN=1

1

1

A B
NETWORK PCB(A)
HP/LP FILTER 12dB/OCTAVE BP FILTER LOW-X TO HIGH-X NETWORK UNIT

AMP UNIT

LOW XOVER 40-120Hz HIGH XOVER 3k-9kHz

Consists of · NETWORK PCB(A) · NETWORK PCB(B)

CN851

2

2

CN851

3

3

1

CN851

4

4

ISOLATOR GAIN=1

CN852

CN852

FAN MOTOR HXM0001

A-a C
B C

CN906

5

5

C
NETWORK PCB(B)
HP/LP FILTER 12dB/OCTAVE

LOW XOVER 40-120Hz HIGH XOVER 3k-9kHz

2
G

6

6

POWER SUPPLY

7

7

3

GM-X944

8

8

A-a A-b

9 A

D

B A

D C

10

A-a A-b

GM-X944

1

1

A-b
AMP GAIN=8.5-33dB
CN301

T

B(A) B(B)

2

2

3

3

1

AMP GAIN=8.5-33dB

4
CN301

4

CN906

HZS12L(A3)

220

5
CN904 CN903 CN902 CN901

5

2

6 B C

6

GM-X944/X1R/EW, ES

7

7

3

A-b

GM-X944

8

8

A-a A-b

11

A

D

1

2

3

4

GM-X944

4. PCB CONNECTION DIAGRAM
4.1 AMP UNIT
NOTE FOR PCB DIAGRAMS
A

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 diagram. 2. Viewpoint of PCB diagrams
Connector Capacitor

C

CN104

SIDE A

4CH 2CH

P.C.Board

Chip Part

SIDE B

B

A

AMP UNIT

C

D

B

CN102

12

A
1 2 3 4

5

6

7

8

GM-X944

SIDE A

A

B

C

D
BFC

FAN MOTOR

A
5 6 7 8

13

1

2

3

4

GM-X944

A
A

AMP UNIT

B

C

D

14

A
1 2 3 4

5

6

7

8

GM-X944

SIDE B
A

B

C

D

A
5 6 7 8

15

1

2

3

4

GM-X944

4.2 NETWORK PCB(A)
A

B

NETWORK PCB(A)

SIDE A

A

CN101

B
OFF, LPF, HPF, BPF LOW, HIGH

B
C

NETWORK PCB(A)

SIDE B

D

16

B
1

2

3

4

1

2

3

4

GM-X944

4.3 NETWORK PCB(B)
A

C

NETWORK PCB(B)

SIDE A

A

CN103

B
LOW, HIGH OFF, LPF, HPF

C

NETWORK PCB(B)

SIDE B

C

D

1

2

3

C

17 4

GM-X944

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 --- ----------------------------------------------Network Unit Consists of Network PCB(A) Network PCB(B) Part No. ------------------------=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R 126 127 128 129 130 131 132 133 134 135 136 137 138 143 144 145 146 147 148 149 150 151 152 153 154 Part No. ------------------------RS1/10S103J RS1/10S472J RS1/10S472J RS1/10S103J RS1/10S103J RS1/10S562J RS1/10S562J RS1/10S103J RS1/10S103J RS1/10S103J RS1/10S103J RS1/10S103J RS1/10S103J RS1/10S102J RS1/10S102J RS1/10S102J RS1/10S102J RS1/10S562J RS1/10S562J RS1/10S103J RS1/10S103J RS1/10S562J RS1/10S562J RS1/10S103J RS1/10S103J

BC
IC IC IC IC IC IC IC IC S S S S VR VR VR 101 102 103 104 105 106 107 108 101 102 103 104 101 102 103

Unit Number : HWG0020(GM-X944/X1R/UC) : HWG0016(GM-X944/X1R/EW) : HWG0021(GM-X944/X1R/ES) Unit Name : Network Unit

MISCELLANEOUS
IC IC IC IC IC IC IC IC Switch(OFF, LPF, HPF, BPF) Switch(OFF, LPF, HPF) Slide Switch(LOW, HIGH) Slide Switch(LOW, HIGH) Variable Resistor 20k(E) Volume 20k(E) Variable Resistor 20k(E) NJM2068D NJM2068D NJM2068D NJM2068D NJM2068D NJM2068D NJM2068D NJM2068D HSH0002 CSH1029 CSH1042 CSH1042 CCS1266 HCS0002 CCS1266

CAPACITORS
C C C C C C C C C C C C C C C C C C C C C C C C C 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 CKSQYB184K16 CKSQYB184K16 CKSQYB222K50 CKSQYB222K50 CKSQYB823K50 CKSQYB823K50 CKSQYB103K25 CKSQYB103K25 CKSQYB122K50 CKSQYB122K50 CKSQYB184K16 CKSQYB184K16 CKSQYB184K16 CKSQYB184K16 CKSQYB184K16 CKSQYB184K16 CKSQYB184K16 CKSQYB184K16 CCSQCH470J50 CCSQCH470J50 CFTLA124J50 CFTLA124J50 CKSQYB182K50 CKSQYB182K50 CFTLA124J50

RESISTORS
R R R R R R R R R R R R R R R R R R R R R R R R R 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 RS1/10S113J RS1/10S113J RS1/10S113J RS1/10S113J RS1/10S822J RS1/10S822J RS1/10S822J RS1/10S822J RS1/10S102J RS1/10S102J RS1/10S182J RS1/10S182J RS1/10S822J RS1/10S822J RS1/10S822J RS1/10S822J RS1/10S102J RS1/10S102J RS1/10S182J RS1/10S182J RS1/10S103J RS1/10S103J RS1/10S103J RS1/10S103J RS1/10S103J

18

GM-X944

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------C C C 126 127 128

Part No. ------------------------CFTLA124J50 CKSQYB182K50 CKSQYB182K50

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q D D D D D D D D D D D D D D 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 653 654 655 657 658 659 660 661 663 664 665 666 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 301 302 303 304 313 314 315 316 317 318 319 320 321 322 Transistor Transistor Transistor Transistor Transistor Transistor Transistor FET FET FET FET FET FET FET FET FET FET FET FET FET FET FET FET Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor FET FET Transistor Transistor Transistor Transistor FET FET FET FET Transistor Transistor Transistor Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode

Part No. ------------------------2SC2240 2SC2240 2SC2240 2SA970 2SA970 2SA970 2SA970 94-4980 94-4980 94-4980 94-4980 94-4980 94-4980 94-4980 94-4980 94-4981 94-4981 94-4981 94-4981 94-4981 94-4981 94-4981 94-4981 2SA1048 2SC2458 2SC2458 2SA1048 2SC2458 2SA1048 2SB1243 2SC2458 2SD1768S 2SD1768S 2SD1768S 2SD1768S 2SA1048 2SB1277 2SB1277 STP50NE08 STP50NE08 2SD2395 2SB1566 2SD1919 2SD1919 STP50NE08 STP50NE08 STP50NE08 STP50NE08 2SD1864 2SC2458 2SB1243 HZS6L(C1) HZS6L(C1) HZS6L(C1) HZS6L(C1) 1SS133 1SS133 1SS133 1SS133 1SS133 1SS133 1SS133 1SS133 RD5R1ES(B2) RD5R1ES(B2)

A
IC IC IC IC IC IC IC IC IC Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q

Unit Number : HWH0134(GM-X944/X1R/UC) : HWH0123(GM-X944/X1R/EW) : HWH0135(GM-X944/X1R/ES) Unit Name : Amp Unit

MISCELLANEOUS
201 202 651 851 852 853 854 855 901 201 202 203 204 205 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 337 338 339 340 341 342 343 344 345 IC IC IC IC IC IC IC IC IC Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor NJM2068D NJM2068D PA2027A NJM2068D NJM2068D NJM2068D NJM2068D NJM2068D UPC494C 2SC2458 2SC2458 2SC2458 2SC2458 DTA124ES 2SA992 2SA992 2SA992 2SA992 2SC1845 2SC1845 2SC1845 2SC1845 2SK389 2SK389 2SK389 2SK389 2SC1845 2SC1845 2SC1845 2SC1845 2SC1845 2SC1845 2SC1845 2SC1845 2SA992 2SA992 2SA992 2SA992 2SA992 2SA992 2SA992 2SA992 2SA970 2SA970 2SA970 2SA970 2SC2240 2SC2240 2SC2240 2SC2240 2SC1845 2SC1845 2SC1845 2SC1845 2SC2240

19

GM-X944

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------D D D D D D D D D D D D D D D D D D D D D D D D D L L L L L T TH TH TH TH S S VR VR VR VR VR VR FU FU FU 323 324 602 651 652 653 654 655 656 658 659 661 662 663 664 665 907 908 909 910 912 913 914 915 916 851 852 853 854 901 901 901 902 903 904 851 901 201 202 501 502 503 504 902 903 904 Diode Diode LED Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Ferri-Inductor Ferri-Inductor Ferri-Inductor Ferri-Inductor Choke Coil 50mH Transformer Thermistor Thermistor Thermistor Thermistor

Part No. ------------------------RD5R1ES(B2) RD5R1ES(B2) SML210LT(LMN) RM4Z RM4Z 1SS133 HZS7L(B2) ERA15-02VH ERA15-02VH 1SS133 1SS133 1SS133 1SS133 1SS133 1SS133 1SS133 FML22S HZS16L(1) HZS16L(1) FML22R ALO1ZWS ALO1ZWS ALO1ZWS ALO1ZWS HZS12L(A3) CTF1007 CTF1007 CTF1007 CTF1007 CTH1144 HTT0010 CCX1013 CCX1013 CCX1035 CCX1027

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R 220 221 222 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 353 354 355 356 357 358 359 360 361 362 363 364 369 370

Part No. ------------------------RS1/10S163J RS1/10S163J RS1/10S163J RS1/10S301J RS1/10S301J RS1/10S301J RS1/10S301J RS1/10S183J RS1/10S183J RS1/10S183J RS1/10S183J RD1/4PU221J RD1/4PU221J RD1/4PU221J RD1/4PU221J RD1/4PU680J RD1/4PU680J RD1/4PU680J RD1/4PU680J RD1/4PU680J RD1/4PU680J RD1/4PU680J RD1/4PU680J RD1/4PU332J RD1/4PU332J RD1/4PU332J RD1/4PU332J RD1/4PU101J RD1/4PU101J RD1/4PU101J RD1/4PU101J RD1/4PU153J RD1/4PU153J RD1/4PU153J RD1/4PU153J RD1/4PU181J RD1/4PU181J RD1/4PU181J RD1/4PU181J RD1/4PU432J RD1/4PU432J RD1/4PU432J RD1/4PU432J RD1/4PU221J RD1/4PU221J RD1/4PU221J RD1/4PU221J RD1/4PU471J RD1/4PU471J RD1/4PU471J RD1/4PU471J RD1/4PU183J RD1/4PU183J RD1/4PU183J RD1/4PU183J RD1/4PU332J RD1/4PU332J RD1/4PU332J RD1/4PU332J RD1/4PU181J RD1/4PU181J RD1/4PU181J RD1/4PU181J RD1/4PU163J RD1/4PU163J

Slide Switch(4CH2CH) CSH1042 Switch(BFC)(GM-X944/X1R/EW, ES) HSH-156 Variable Resistor 10k(A) CCS1265 Variable Resistor 10k(A) CCS1265 Semi-fixed 10k(B) CCP1206 Semi-fixed 10k(B) Semi-fixed 10k(B) Semi-fixed 10k(B) Fuse 30A Fuse 30A Fuse 30A Network Unit(GM-X944/X1R/UC) Network Unit(GM-X944/X1R/EW) Network Unit(GM-X944/X1R/ES) CCP1206 CCP1206 CCP1206 HEK0030 HEK0030 HEK0030 HWG0020 HWG0016 HWG0021

RESISTORS
R R R R R R R R R R R R R R R 141 142 201 202 203 204 211 212 213 214 215 216 217 218 219 RS1/10S222J RS1/10S222J RD1/4PU472J RD1/4PU472J RD1/4PU472J RD1/4PU472J RD1/4PU111J RD1/4PU111J RD1/4PU111J RD1/4PU111J RS1/10S202J RS1/10S202J RS1/10S202J RS1/10S202J RS1/10S163J

20

GM-X944

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R 371 372 373 374 375 376 377 378 379 380 381 382 383 384 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 467 468 605

Part No. ------------------------RD1/4PU163J RD1/4PU163J RD1/4PU121J RD1/4PU121J RD1/4PU121J RD1/4PU121J RD1/4PU102J RD1/4PU102J RD1/4PU102J RD1/4PU102J RD1/4PU622J RD1/4PU622J RD1/4PU622J RD1/4PU622J RD1/4PU104J RD1/4PU104J RD1/4PU104J RD1/4PU104J RD1/4PU101J RD1/4PU101J RD1/4PU101J RD1/4PU101J RD1/4PU102J RD1/4PU102J RD1/4PU102J RD1/4PU102J RD1/4PU101J RD1/4PU101J RD1/4PU101J RD1/4PU101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J RS1/10S101J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J SPR30R1J RS1/10S122J RS1/10S122J RD1/4PU561J

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R 606 656 657 658 659 660 661 662 663 664 665 666 667 668 671 672 676 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 871 872 873

Part No. ------------------------RD1/4PU561J RD1/4PU473J RD1/4PU104J RD1/4PU472J RD1/4PU103J RD1/4PU102J RD1/4PU472J RD1/4PU222J RD1/4PU563J RD1/4PU222J RD1/4PU103J RD1/4PU103J RD1/4PU222J RD1/4PU472J RD1/4PU221J RD1/4PU152J RD1/4PU221J RD1/4PU472J RD1/4PU101J RD1/4PU472J RD1/4PU682J RD1/4PU682J RD1/4PU103J RD1/4PU223J RD1/4PU223J RD1/4PU223J RD1/4PU563J RD1/4PU563J RD1/4PU563J RD1/4PU563J RD1/4PU563J RD1/4PU563J RD1/4PU563J RD1/4PU563J RD1/4PU564J RD1/4PU564J RD1/4PU564J RD1/4PU564J RD1/4PU473J RD1/4PU473J RD1/4PU473J RD1/4PU473J RS1/2PMF100J RS1/2PMF100J RS1/2PMF100J RS1/2PMF100J RS1/10S471J RS1/10S471J RS1/10S471J RS1/10S471J RS1/10S223J RS1/10S223J RS1/10S223J RS1/10S223J RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D

21

GM-X944

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R 874 875 876 877 878 879 880 883 884 885 886 887 889 901 902 907 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 932 935 936 937 938 939 947 948 949 950 951 952 953 954 955 956 957

Part No. ------------------------RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RN1/10SE1002D RS1/10S223J RS1/10S223J RS1/10S821J RS1/10S821J RS1/10S472J RS1/10S222J RS1/10S472J RS1/10S472J RD1/4PU105J RS1/2PMF220J RS1/10S473J RS1/2PMF220J RS1/10S153J RS1/10S102J RD1/4PU272J RS1/10S472J RS1/10S472J RS1/10S472J RD1/4PU332J RD1/4PU332J RS1/2PMF220J RS1/2PMF220J RD1/4PU472J RD1/4PU472J RD1/4PU472J RD1/4PU472J RS1/2PMF121J RS1/2PMF121J RS1/2PMF121J RS1/2PMF121J RS1/2PMF121J RS1/2PMF121J RD1/4PU104J RS1/10S202J RS1/10S223J RS1/10S103J RD1/4PU272J RD1/4PU272J RS1/2PMF100J RS1/2PMF100J RD1/4PU113J RS1/10S101J RD1/4PU752J RS1/2PMF560J RS1/2PMF560J RD1/4PU221J RS1/10S393J RS1/10S472J RS1/10S222J

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 345 346 347 348 349 350 351 352 357 358 359 360 361 362 363 364 365 366 367 368 457 458 651 652 653 654 220µF/10V

Part No. ------------------------CEJANP100M16 CEJANP100M16 CEJANP100M16 CMA220J2H CMA220J2H CMA220J2H CMA220J2H CQMA152J50 CQMA152J50 CQMA152J50 CQMA152J50 CQMA103J50 CQMA103J50 CQMA103J50 CQMA103J50 CMA030D2H CMA030D2H CMA030D2H CMA030D2H CMA180J2H CMA180J2H CMA180J2H CMA180J2H HCH0002 HCH0002 HCH0002 HCH0002 CFTLA393J50 CFTLA393J50 CFTLA393J50 CFTLA393J50 CEAS100M50 CEAS100M50 CEAS100M50 CEAS100M50 CEAS470M50 CEAS470M50 CEAS470M50 CEAS470M50 CFTLA333J50 CFTLA333J50 CFTLA333J50 CFTLA333J50 CQMA102J50 CQMA102J50 CQMA102J50 CQMA102J50 CMA030D2H CMA030D2H CMA030D2H CMA030D2H CMA680J2H CMA680J2H CMA680J2H CMA680J2H CMA680J2H CMA680J2H CMA680J2H CMA680J2H CEJA101M16 CEJA101M16 CCH1036 CFTLA103J50 CEAS100M16 CEAS100M16

(GM-X944/X1R/EW, ES)

100µF/16V 100µF/16V 100µF/16V 100µF/16V

CAPACITORS
C C C C C C C C C C 201 202 203 204 205 206 207 208 209 301 CCSQCH820J50 CCSQCH820J50 CCSQCH820J50 CCSQCH820J50 CEJA470M16 CEJA470M16 CEJA470M16 CEJA470M16 CKSQYB102K50 CEJANP100M16

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GM-X944

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C 655 656 657 658 659 660 661 662 663 664 665 666 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 875 876 877 878 879 880 881 882 883 885 886 887 888 889 890 891 892 893 894 895 896 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 470µF/16V 470µF/16V

Part No. ------------------------CFTLA103J50 CCH1183 CKSQYB223K50 CEAS220M16 CCH1183 CFTLA105J50 CFTLA103J50 CFTLA103J50 CFTLA334J50 CKSQYB223K50 CKSQYB223K50 CKSQYB223K50 CEAS100M16 CEAS100M16 CEAS100M16 CEAS100M16 CQMA472J50 CQMA472J50 CQMA472J50 CQMA472J50 CCSQCH470J50 CCSQCH470J50 CCSQCH470J50 CCSQCH470J50 CCSQCH470J50 CCSQCH470J50 CCSQCH470J50 CCSQCH470J50 CKSQYB471K50 CKSQYB471K50 CKSQYB471K50 CKSQYB471K50 CKSQYB471K50 CKSQYB471K50 CEAS4R7M35 CEAS4R7M35 CCSQCH470J50 CKSQYB473K50 CKSQYB473K50 CKSQYB473K50 CKSQYB473K50 CKSQYB473K50 CKSQYB473K50 CKSQYB473K50 CKSQYB473K50 CCSSL101J50 CCSSL101J50 CCSSL101J50 CCSSL101J50 CEAS221M10 CEAS2R2M50 CEAS101M16 CQMA472J50 CQMA472J50 CCH1310 CCH1310 CCH1310 478LBA050M2DC 478LBA050M2DC 478LBA050M2DC 478LBA050M2DC CQMA102J50 CQMA102J50 CEASR10M50 CEASR10M50

=====Circuit Symbol and No.===Part Name --- ----------------------------------------------C C C C C C C C C C C C C C C C C C C C C C 918 919 920 921 922 923 924 925 926 927 930 931 932 933 934 935 936 941 942 943 946 947

Part No. ------------------------337RZM050M1020 337RZM050M1020 337RZM050M1020 337RZM050M1020 CFTLA224J50 CFTLA224J50 CFTLA564J50 CCG-081 CCG-081 CQMA102J50 337RZM050M1020 337RZM050M1020 CEAS470M10 CEAS101M16 CEAS101M16 CKSQYB102K50 CKSQYB102K50 CKSQYB473K50 CKSQYB473K50 CKSQYB223K50 CFTNA104J50 CFTNA104J50

Miscellaneous Parts List
Fan Motor HXM0001

4700µF/16V 4700µF/16V 4700µF/16V

23

GM-X944

6. ADJUSTMENT
- Setting Idle Current
The following is the instructions for setting Idle current: Setting the idle current to the following ranges will require you to measure the voltage across the indicated resistors and adjusting the indicated variable resistors to set the required voltage range. This adjustment is performed with no loads on the outputs with no signal input. Specification: Voltage Range: 45 mA ± 5mA 4.0 mV to 5.0 mV

1. Measure voltage across Resistor R433 and set VR501 to Voltage Range. 2. Measure voltage across Resistor R434 and set VR502 to Voltage Range. 3. Measure voltage across Resistor R435 and set VR503 to Voltage Range. 4. Measure voltage across Resistor R436 and set VR504 to Voltage Range. Notes: The Idle current should be set when the amplifier has not been run for awhile, and set at room temperature.

24

GM-X944

7. GENERAL INFORMATION
7.1 DISASSEMBLY
- Removing the Case and the Plate (Fig.1) Remove the six screws. Remove the screw. Remove the three screws. Remove the six screws. Disconnect the connector and then remove the Case. Case Connector

Remove the screw and then remove the Plate.

Fig.1 Plate - Removing the Amp Unit (Fig.2) Remove the two screws. Remove the two screws. Remove the eight screws and then remove the Amp Unit.

Amp Unit

Fig.2

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GM-X944

8. OPERATIONS AND SPECIFICATIONS
8.1 OPERATIONS

26

Gain Control
The power indicator lights when the power is switched on.

Power Indicator

Adjusting the gain controls A and B will help match the output of the car stereo to the Pioneer amplifier. Normally, set the gain controls to the "NORMAL" position. If the output is low, even when the volume of the car stereo is turned up, turn these controls clockwise. If there is distortion when the volume of the car stereo is turned up, turn these controls counter-clockwise.

· If you only use one input plug, set the gain controls for speaker outputs A and B to the same position. · When using with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL position. When using with an RCA equipped Pioneer car stereo with max. output of 4 V or more, adjust level to match the car stereo output level.

LPF (Low-Pass Filter)/HPF (High-Pass Filter)/BPF (Band-Pass Filter) and LOW/HIGH Select Switch
Set the LPF/HPF/BPF and LOW/HIGH select switch as follows according to the type of speaker that is connected to the speaker output connector and the car stereo system: LPF/HPF/BPF and LOW/HIGH Select Switch
LPF HPF HIGH LOW HIGH LOW

Audio frequency range to be output
-- 3k to 9k Hz -- 40 to 120 Hz *2 3k to 9k Hz -- 40 to 120 Hz --

Speaker Type
Mid Subwoofer Tweeter*3 Full range

Remarks

Connect a mid range speaker. Connect a subwoofer. Connect a tweeter. Use if you want to cut the very low frequency range because it is not necessary for the speakers you are using. BPF (for CH A)*4 OFF 40 to 120 Hz -- -- 3k to 9k Hz Full range Full range Mid Connect a mid range speaker.

Cut Off Frequency Control

Combining LPF/HPF/BPF and LOW/HIGH select switch settings lets you select between cut off frequencies from 40 to 120 Hz and 3k to 9k Hz. (Example: LPF and HIGH)

(dB)

(3 kHz) (9 kHz)

0

-3

RCA Input Select Switch
For two-channel input, slide this switch to the left. For four-channel input, slide this switch to the right.

Level

Frequency

(Hz)

*2 With CH A, even if the setting is HPF-HIGH, you can only select the same cut off frequency as with HPF-LOW (40 to 120 Hz). *3 If you connect the tweeter directly, you must set the CH B to HPF-HIGH. *4 Be sure to set the LOW/HIGH select switch to HIGH.

GM-X944

27

GM-X944

Connection Diagram
Fuse (30 A) × 2 Grommet Special red battery wire [RD-223] (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.

Fuse (30 A) × 2

Ground wire (black) [RD-223] (sold separately). Connect to metal body or chassis.

RCA input Connecting wires with RCA pin plugs (sold separately).

Amplifier with RCA input jacks

Car stereo with RCA output jacks External Output For details on how to connect to RCA input jacks A and B, see the "Connecting the Speakers and Input wires" section.

Front side

RCA output jack

RCA input jack B RCA input jack A

Back side Fuse (30 A) × 3

Connecting wires with RCA pin plugs (sold separately).

Speaker output terminal

System remote control wire (sold separately) Connect the male terminal of this wire to the system remote control terminal 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.

28

GM-X944

8.2 SPECIFICATIONS
- GM-X944/X1R/UC

Power source .............................................................................................................. 14.4 V DC (10.8 -- 15.1 V allowable) Grounding system ............................................................................................................................................ Negative type Current consumption ........................................................................................................ 43.7 A (at continuous power, 4 ) Average current drawn* ........................................................................................................ 14.5 A (4 for four channels) 26.5 A (4 for two channels) Fuse ............................................................................................................................................................................ 30 A × 3 Dimensions .......................................................................................................................... 270 (W) × 60 (H) × 297 (D) mm [10-5/8 (W) × 2-3/8 (H) × 11-3/4 (D) in] Weight ........................................................................................................ 5.4 kg (11.9 lbs) (Leads for wiring not included) Maximum power output .................................................................................................................... 150 W × 4 / 500 W × 2 Continuous power output ............................................................ 75 W × 4 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.04% THD) 250 W × 2 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.4% THD) 125 W × 4 (at 14.4 V, 2 , 20 -- 20,000 Hz, 0.4% THD) Load impedance .............................................................................................................................. 4 (1 -- 8 allowable) (Bridge connection: 2 -- 8 allowable) Frequency response ............................................................................................................ 10 -- 50,000 Hz (+0 dB, ­1 dB) Signal-to-noise ratio ...................................................................................................................... 105 dB (IHF­A network) Distortion ............................................................................................................................................ 0.005% (10 W, 1 kHz) Separation ........................................................................................................................................................ 65 dB (1 kHz) Variable crossover network A CH: LPF-L/LPF-H/HPF-L/BPF B CH: LPF-L/LPF-H/HPF-L/HPF-H Cut off frequency .................................................................................................... Low frequency: 40 -- 120 Hz High frequency: 3k -- 9k Hz Cut off slope .......................................................................................................................................... ­12 dB/oct Maximum input level/impedance .................................................................................... RCA: 6.5 V/22 k (0.4 -- 6.5 V)

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.

29

GM-X944

- GM-X944/X1R/EW

Power source .......................................................................................................... 14.4 V DC (10.8 -- 15.1 V allowable) Grounding system .......................................................................................................................................... Negative type Current consumption .................................................................................................... 43.7 A (at continuous power, 4 ) Average current drawn* ...................................................................................................... 14.5 A (4 for four channels) 26.5 A (4 for two channels) Fuse ........................................................................................................................................................................ 30 A × 3 Dimensions ...................................................................................................................... 270 (W) × 60 (H) × 297 (D) mm Weight .................................................................................................................... 5.4 kg (Leads for wiring not included) Maximum power output .................................................................................................................. 150 W × 4 / 500 W × 2 Continuous power output .......................................................... 75 W × 4 (at 14.4V, 4 , 20 -- 20,000Hz, 0.04% THD) 250 W × 2 (at 14.4V, 4 , 20 -- 20,000Hz, 0.4% THD) 125 W × 4 (at 14.4V, 2 , 20 -- 20,000Hz, 0.4% THD) 115 W × 4 / 360 W × 2 (DIN45324, +B=14.4 V) Load impedance .......................................................................................................................... 4 (1 -- 8 allowable) (Bridge connection: 2 -- 8 allowable) Frequency response .......................................................................................................... 10 -- 50,000 Hz (+0 dB, ­1 dB) Signal-to-noise ratio .................................................................................................................... 105 dB (IEC-A network) Distortion .......................................................................................................................................... 0.005% (10 W, 1 kHz) Separation ...................................................................................................................................................... 65 dB (1 kHz) Varibale crossover network A CH: LPF-L/LPF-H/HPF-L/BPF B CH: LPF-L/LPF-H/HPF-L/HPF-H Cut off frequency ................................................................................................ Low frequency: 40 -- 120 Hz High frequency: 3k -- 9k Hz Cut off slope ...................................................................................................................................... ­12 dB/oct Maximum input level/impedance .................................................................................. RCA: 6.5 V/22 k (0.4 -- 6.5 V)

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.

30

GM-X944

- GM-X944/X1R/ES

Power source .............................................................................................................. 14.4 V DC (10.8 -- 15.1 V allowable) Grounding system ............................................................................................................................................ Negative type Current consumption ........................................................................................................ 43.7 A (at continuous power, 4 ) Average current drawn* ........................................................................................................ 14.5 A (4 for four channels) 26.5 A (4 for two channels) Fuse ............................................................................................................................................................................ 30 A × 3 Dimensions .......................................................................................................................... 270 (W) × 60 (H) × 297 (D) mm Weight ........................................................................................................................ 5.4 kg (Leads for wiring not included) Maximum power output .................................................................................................................... 150 W × 4 / 500 W × 2 Continuous power output ............................................................ 75 W × 4 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.04% THD) 250 W × 2 (at 14.4 V, 4 , 20 -- 20,000 Hz, 0.4% THD) 125 W × 4 (at 14.4 V, 2 , 20 -- 20,000 Hz, 0.4% THD) Load impedance .............................................................................................................................. 4 (1 -- 8 allowable) (Bridge connection: 2 -- 8 allowable) Frequency response ............................................................................................................ 10 -- 50,000 Hz (+0 dB, ­1 dB) Signal-to-noise ratio ........................................................................................................................ 105 dB (IEC-A network) Distortion ............................................................................................................................................ 0.005% (10 W, 1 kHz) Separation ........................................................................................................................................................ 65 dB (1 kHz) Variable crossover network A CH: LPF-L/LPF-H/HPF-L/BPF B CH: LPF-L/LPF-H/HPF-L/HPF-H Cut off frequency .................................................................................................... Low frequency: 40 -- 120 Hz High frequency: 3k -- 9k Hz Cut off slope .......................................................................................................................................... ­12 dB/oct Maximum input level/impedance .................................................................................... RCA: 6.5 V/22 k (0.4 -- 6.5 V)

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.

31