Pioneer GM-X624 User manual

ORDER NO.
CRT2202
Se r v i c e
M a nu a l
BRIDGEABLE FOUR-CH 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. APR. 1998 Printed in Japan
GM-X624 X1R/UC, ES, EW
CONTENTS
1. SAFETY INFORMATION ............................................1
2. EXPLODED VIEWS AND PARTS LIST.......................2
3. SCHEMATIC DIAGRAM .............................................6
4. PCB CONNECTION DIAGRAM ................................12
5. ELECTRICAL PARTS LIST ........................................14
6. ADJUSTMENT..........................................................18
7. GENERAL INFORMATION .......................................18
7.1 IC .........................................................................18
7.2 DISASSEMBLY ...................................................19
8. OPERATIONS AND SPECIFICATIONS.....................20
GM-X524 X1R/UC
1. SAFETY INFORMATION
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-X624/X1R/UC

2
GM-X624, GM-X524
3
5
4
2
1
89
6
7
9
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
-PACKING SECTION PARTS LIST
Part No.
GM-X624 GM-X524
Mark No. Symbol and Description X1R/UC X1R/ES X1R/EW X1R/UC
1 Owner’s Manual HRD0037 HRD0039 HRD0040 HRD0038
Owner’s Manual Not used HRD0071 Not used Not used
* 2 Screw Assy HEA0017 HEA0017 HEA0017 HEA0017
3 Screw BYC40P180FZK BYC40P180FZK BYC40P180FZK BYC40P180FZK
4 Polyethylene Bag HEG0011 HEG0011 HEG0011 HEG0011
* 5 Warranty Card HRY1070 Not used HRY1087 Not used
* Card Not used Not used Not used ARY1048
6 Polyethylene Bag HEG0012 HEG0012 HEG0012 HEG0012
7 Carton HHG0145 HHG0147 HHG0148 HHG0146
8 Contain Box HHL0145 HHL0147 HHL0148 HHL0146
9 Protector HHP0025 HHP0025 HHP0025 HHP0025
-Owner's Manual
Model Part No. Language
GM-X624/X1R/UC HRD0037 English, French
GM-X624/X1R/ES HRD0039 English, Spanish
HRD0071 Arabic, Portuguese(B)
GM-X624/X1R/EW HRD0040 English, French, German, Dutch, Spanish, Italian
GM-X524/X1R/UC HRD0038 English, French
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.

GM-X624, GM-X524
3
2.2 EXTERIOR

4
GM-X624, GM-X524
1 Screw(M3x12) CBA1323
2 Screw(M3x14) CBA1382
3 Screw HBA0006
4 Screw HBA0011
5 Cord Assy HDE0022
6 Case HNB0036
7 Heat Sink See Contrast table(2)
8 Spacer HNV3975
9 Amp Unit See Contrast table(2)
10 Screw BMS30P060FZK
11 Screw BMS30P080FMC
12 Cord(CN303) HDE0020
13 Bass Bar HNC0034
14 Bass Bar HNC0035
15 Bass Bar HNC0036
16 Bass Bar HNC0037
17 Bass Bar HNC0043
18 Bass Bar HNC0044
19 Clip HNC0054
20 Heat Sink HNR0085
21 Heat Sink HNR0086
22 Clamper HNV0015
23 Fuse(20A) HEK0020
24 Pin Jack(CN853) HKB0002
25 Pin Jack(CN851) HKB0004
26 Terminal(CN601) HKE0002
27 Terminal(CN301,CN302) HKE0010
28 Terminal(CN602) HKE0012
29 Holder HNC0025
30 Holder HNC0026
31 Screw PPZ30P060FZK
32 Plate Unit See Contrast table(2)
33 Badge Unit See Contrast table(2)
34 Light Pipe Unit HXA0201
35 Panel Unit See Contrast table(2)
36 Plate See Contrast table(2)
37 Panel Unit See Contrast table(2)
38 Plate See Contrast table(2)
39 Diode(D611) YG902N2
40 Diode(D910) YG902C2
41 Transistor(Q329-Q332) 2SC1568
42 Thermistor(TH601,TH602) CCX1013
43 Transistor(Q333-Q336) 2SD2438
44 Transistor(Q337-Q340) 2SB1587
45 FET(Q610-Q615) IRFIZ44N
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
(2) CONTRAST TABLE
GM-X624/X1R/UC, GM-X624/X1R/ES, GM-X624/X1R/EW and GM-X524/X1R/UC are constructed the same except for the
following:
Part No.
GM-X624 GM-X524
Mark No. Symbol and Description X1R/UC X1R/ES X1R/EW X1R/UC
7 Heat Sink HNR0069 HNR0070 HNR0070 HNR0102
9 Amp Unit HWH0048 HWH0046 HWH0045 HWH0047
32 Plate Unit HXA0104 HXA0105 HXA0105 HXA0105
33 Badge Unit HXA0261 HXA0113 HXA0113 HXA0113
35 Panel Unit HXA0253 HXA0252 HXA0252 HXA0252
36 Panel * HNS0065 HNS0046 HNS0046 HNS0046
37 Panel Unit HXA0258 HXA0257 HXA0257 HXA0257
38 Panel * HNS0064 HNS0039 HNS0039 HNS0039

5
GM-X624, GM-X524

GM-X624, GM-X524
A
B
C
D
20k(E)
20k(E)
20k(E)
20k(E)
20k(E)
20k(E)
20k(E)
20k(E)
0V
2.2V
0.3V
1.8V
3.8V
0V
1.8V
3.9V
3.9V
14.4V
5V
5V
2.4V
2.4V
PWM CONTROL
BUFFER AMP ISOLATOR
100H
100H
6
A
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-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
A-a

7
GM-X624, GM-X524
5
A
B
C
D
10k(A)
10k(A)
0.2V
14.4V
14.2V
10.7V
14.4V0V
0.2V
0V
5V
0.3V
3.2V
0.1V
0V
.2V
.3V
8V
8V
V
8V
L
POWER CONTROL /MUTE
50H
HEK0020
HEK0020
Fig. 3
A
: AUDIO SIGNL
AMP UNIT
A
A-b

20k(E)
20k(E)
20k(E) 20k(E)
20k(E)
20k(E)
BUFFER AMP ISOLATOR
8
GM-X624, GM-X524
A
B
C
D
A-a A-b
A-a

20k(E)
20k(E)
20k(E)
20k(E)
0.3V
0V
2.2V
0.3V
1.8V
3.8V
0V
1.8V
3.9V
3.9V
14.4V
5V
5V
2.4V
2.4V
PWM CONTROL
100H
100H
9
GM-X624, GM-X524
5
A
B
C
D
A-a A-b
A-a

10k(A)
10k(A)
10
GM-X624, GM-X524
A
B
C
D
A-a A-b
A-b
: AUDIO SIGNL
AMP UNIT
A

10k(A)
0.2V
14.4V
14.2V
10.7V 14.4V0V
0.2V
0V
5V
0.3V
3.2V
0.1V POWER CONTROL /MUTE
50H
HEK0020
HEK0020
11
GM-X624, GM-X524
5
A
B
C
D
A-a A-b
A-b

GM-X624, GM-X524
A
B
C
D
12
A
4. PCB CONNECTION DIAGRAM
4.1 AMP UNIT
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

13
GM-X624, GM-X524
5
A
SIDE A
A
B
C
D

14
GM-X624, GM-X524
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. --- ------ --------------------------------------------- -------------------------
Unit Number : HWH0048(GM-X624/X1R/UC)
HWH0046(GM-X624/X1R/ES)
HWH0045(GM-X624/X1R/EW)
HWH0047(GM-X524/X1R/UC)
Unit Name : Amp Unit
MISCELLANEOUS
IC 121 IC NJM2068D
IC 122 IC NJM2068D
IC 123 IC NJM2068D
IC 124 IC NJM2068D
IC 125 IC NJM2068D
IC 126 IC NJM2068D
IC 127 IC NJM2068D
IC 128 IC NJM2068D
IC 601 IC PA2027A
IC 602 IC UPC494C
IC 851 IC NJM2068D
IC 852 IC NJM2068D
IC 853 IC NJM2068D
IC 854 IC NJM2068D
IC 855 IC NJM2068D
Q 339 Transistor 2SB1587
Q 340 Transistor 2SB1587
Q 601 Transistor 2SC2458
Q 602 Transistor 2SA1048
Q 603 Transistor 2SB1243
Q 604 Transistor 2SA1048
Q 606 Transistor 2SD1919
Q 607 Transistor 2SD1919
Q 608 Transistor 2SB1277
Q 609 Transistor 2SB1277
Q 610 FET IRFIZ44N
Q 611 FET IRFIZ44N
Q 612 FET IRFIZ44N
Q 613 FET IRFIZ44N
Q 614 FET IRFIZ44N
Q 615 FET IRFIZ44N
Q 616 Transistor 2SD2395
Q 617 Transistor 2SB1566
Q 901 Transistor 2SD1768S
Q 902 Transistor 2SD1768S
Q 903 Transistor 2SD1768S
Q 904 Transistor 2SD1768S
Q 905 Transistor 2SA1048
Q 906 Transistor 2SC2458
Q 907 Transistor 2SC2458
Q 908 Transistor 2SC2458
Q 909 Transistor 2SA1048
Q 201 Transistor 2SC2458
Q 202 Transistor 2SC2458
Q 203 Transistor 2SC2458
Q 204 Transistor 2SC2458
Q 205 Transistor 2SC2458
Q 206 Transistor 2SC2458
Q 207 Transistor 2SA1048
Q 301 Transistor 2SA992
Q 302 Transistor 2SA992
Q 303 Transistor 2SA992
Q 304 Transistor 2SA992
Q 305 Transistor 2SA992
Q 306 Transistor 2SA992
Q 307 Transistor 2SA992
Q 308 Transistor 2SA992
Q 309 Transistor 2SC1845
Q 310 Transistor 2SC1845
Q 311 Transistor 2SC1845
Q 312 Transistor 2SC1845
Q 313 Transistor 2SC1845
Q 314 Transistor 2SC1845
Q 315 Transistor 2SC1845
Q 316 Transistor 2SC1845
Q 317 Transistor 2SC1845
Q 318 Transistor 2SC1845
Q 319 Transistor 2SC1845
Q 320 Transistor 2SC1845
Q 321 Transistor 2SA992
Q 322 Transistor 2SA992
Q 323 Transistor 2SA992
Q 324 Transistor 2SA992
Q 325 Transistor 2SC1845
Q 326 Transistor 2SC1845
Q 327 Transistor 2SC1845
Q 328 Transistor 2SC1845
Q 329 Transistor 2SC1568
Q 330 Transistor 2SC1568
Q 331 Transistor 2SC1568
Q 332 Transistor 2SC1568
Q 333 Transistor 2SD2438
Q 334 Transistor 2SD2438
Q 335 Transistor 2SD2438
Q 336 Transistor 2SD2438
Q 337 Transistor 2SB1587
Q 338 Transistor 2SB1587
D 301 Diode HZS6L(B1)
D 302 Diode HZS6L(B1)
D 303 Diode HZS6L(B1)
D 304 Diode HZS6L(B1)
D 305 Diode 1SS133
D 306 Diode 1SS133
D 307 Diode 1SS133
D 308 Diode 1SS133
A

15
GM-X624, GM-X524
D 309 Diode 1SS133
D 310 Diode 1SS133
D 311 Diode 1SS133
D 312 Diode 1SS133
D 601 Diode RM4Z
D 602 Diode HZS7L(B2)
D 603 Diode 1SS133
D 604 Diode 1SS133
D 606 Diode 1SS133
D 607 Diode 1SS133
D 610 Diode YG902C2
D 611 Diode YG902N2
D 612 Diode HZS16L(1)
D 613 Diode HZS16L(1)
D 901 Diode 1SS133
D 902 Diode 1SS133
D 903 Diode 1SS133
D 904 Diode 1SS133
D 909 Diode 1SS133
D 910 LED BR4361F
L 601 Choke Coil 50H CTH1144
L 602 Choke Coil 100H CTH1150
L 603 Choke Coil 100H CTH1150
T 601 Transformer HTT0002
TH 601 Thermistor CCX1013
TH 602 Thermistor CCX1013
TH 603 Thermistor CCX1035
S 101 Switch CSH1029
S 102 Switch CSH1029
S 601 Switch(ES,EW model) HSH-156
S 851 Switch CSH1021
VR 121 Semi-fixed 20kΩ(E) CCS1251
VR 122 Semi-fixed 20kΩ(E) CCS1251
VR 201 Semi-fixed 10kΩ(A) CCS1250
VR 202 Semi-fixed 10kΩ(A) CCS1250
EF 601 Capacitors CCG-081
EF 602 Capacitors CCG-081
Fuse(20A) HEK0020
RESISTORS
R 101 RD1/4PU103J
R 102 RD1/4PU103J
R 103 RD1/4PU103J
R 104 RD1/4PU103J
R 105 RD1/4PU103J
R 106 RD1/4PU103J
R 107 RD1/4PU103J
R 108 RD1/4PU103J
R 109 RD1/4PU103J
R 110 RD1/4PU103J
R 111 RD1/4PU103J
R 112 RD1/4PU103J
R 113 RD1/4PU472J
R 114 RD1/4PU472J
R 115 RD1/4PU472J
R 116 RD1/4PU472J
R 117 RD1/4PU103J
R 118 RD1/4PU103J
R 119 RD1/4PU103J
R 120 RD1/4PU103J
R 121 RD1/4PU562J
R 122 RD1/4PU562J
R 123 RD1/4PU562J
R 124 RD1/4PU562J
R 125 RD1/4PU123J
R 126 RD1/4PU123J
R 127 RD1/4PU123J
R 128 RD1/4PU123J
R 129 RD1/4PU103J
R 130 RD1/4PU103J
R 131 RD1/4PU103J
R 132 RD1/4PU103J
R 133 RD1/4PU123J
R 134 RD1/4PU123J
R 135 RD1/4PU123J
R 136 RD1/4PU123J
R 139 RD1/4PU222J
R 140 RD1/4PU222J
R 141 RD1/4PU222J
R 142 RD1/4PU222J
R 201 RD1/4PU472J
R 202 RD1/4PU472J
R 203 RD1/4PU472J
R 204 RD1/4PU472J
R 205 RD1/4PU472J
R 206 RD1/4PU472J
R 207 RD1/4PU223J
R 208 RD1/4PU223J
R 211 RD1/4PU161J
R 212 RD1/4PU161J
R 213 RD1/4PU161J
R 214 RD1/4PU161J
R 301 RD1/4PU432J
R 302 RD1/4PU432J
R 303 RD1/4PU432J
R 304 RD1/4PU432J
R 305 RD1/4PU153J
R 306 RD1/4PU153J
R 307 RD1/4PU153J
R 308 RD1/4PU153J
R 309 RD1/4PU101J
R 310 RD1/4PU101J
R 311 RD1/4PU101J
R 312 RD1/4PU101J
R 317 RD1/4PU331J
R 318 RD1/4PU331J
R 319 RD1/4PU331J
R 320 RD1/4PU331J
R 321 RD1/4PU331J
R 322 RD1/4PU331J
R 323 RD1/4PU331J
R 324 RD1/4PU331J
R 325 RD1/4PU681J
R 326 RD1/4PU681J
R 327 RD1/4PU681J
R 328 RD1/4PU681J
R 329 RD1/4PU561J
R 330 RD1/4PU561J
R 331 RD1/4PU561J
R 332 RD1/4PU561J
R 333 RD1/4PU333J
R 334 RD1/4PU333J
R 335 RD1/4PU333J
R 336 RD1/4PU333J
R 337 RD1/4PU222J
R 338 RD1/4PU222J
R 339 RD1/4PU222J
R 340 RD1/4PU222J
R 341 RD1/4PU223J
R 342 RD1/4PU223J
=====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- ------------------------- =====Circuit Symbol and No.===Part Name Part No. --- ------ --------------------------------------------- -------------------------

16
GM-X624, GM-X524
R 343 RD1/4PU223J
R 344 RD1/4PU223J
R 345 RD1/4PU472J
R 346 RD1/4PU472J
R 347 RD1/4PU472J
R 348 RD1/4PU472J
R 349 RD1/4PU101J
R 350 RD1/4PU101J
R 351 RD1/4PU101J
R 352 RD1/4PU101J
R 353 RD1/4PU562J
R 354 RD1/4PU562J
R 355 RD1/4PU562J
R 356 RD1/4PU562J
R 357 RD1/4PU222J
R 358 RD1/4PU222J
R 359 RD1/4PU222J
R 360 RD1/4PU222J
R 361 RD1/4PU181J
R 362 RD1/4PU181J
R 363 RD1/4PU181J
R 364 RD1/4PU181J
R 365 RD1/4PU100J
R 366 RD1/4PU100J
R 367 RD1/4PU100J
R 368 RD1/4PU100J
R 369 RD1/4PU100J
R 370 RD1/4PU100J
R 371 RD1/4PU100J
R 372 RD1/4PU100J
R 377 0.1Ωx2 CCN1082
R 378 0.1Ωx2 CCN1082
R 379 0.1Ωx2 CCN1082
R 380 0.1Ωx2 CCN1082
R 393 RS1/2PMF100J
R 394 RS1/2PMF100J
R 395 RS1/2PMF100J
R 396 RS1/2PMF100J
R 601 RD1/4PU102J
R 602 RD1/4PU473J
R 603 RD1/4PU103J
R 604 RD1/4PU103J
R 605 RD1/4PU222J
R 606 RD1/4PU472J
R 607 RD1/4PU472J
R 608 RD1/4PU392J
R 609 RD1/4PU392J
R 610 RD1/4PU103J
R 611 RD1/4PU472J
R 612 RD1/4PU101J
R 613 RD1/4PU221J
R 614 RD1/4PU102J
R 616 RD1/4PU101J
R 617 RD1/4PU103J
R 618 RD1/4PU223J
R 619 RD1/4PU392J
R 620 RD1/4PU153J
R 621 RD1/4PU102J
R 622 RD1/4PU153J
R 623 (ES,EW model) RD1/4PU105J
R 625 RD1/4PU332J
R 626 RD1/4PU332J
R 627 RD1/4PU472J
R 628 RD1/4PU472J
R 629 RD1/4PU272J
R 630 RD1/4PU272J
R 631 RD1/4PU272J
R 632 RD1/4PU472J
R 633 RD1/4PU820J
R 634 RD1/4PU820J
R 635 RD1/4PU472J
R 636 RD1/4PU472J
R 637 RD1/4PU820J
R 638 RD1/4PU820J
R 639 RD1/4PU820J
R 640 RD1/4PU820J
R 641 RS1/2PMF100J
R 642 RS1/2PMF100J
R 643 RS1/2PMF220J
R 645 RS1/2PMF100J
R 646 RS1/2PMF100J
R 647 RD1/4PU472J
R 648 RD1/4PU472J
R 650 RD1/4PU104J
R 651 RD1/4PU183J
R 652 RD1/4PU563J
R 654 RD1/4PU223J
R 655 RD1/4PU223J
R 656 RD1/4PU223J
R 851 RD1/4PU471J
R 852 RD1/4PU471J
R 853 RD1/4PU471J
R 854 RD1/4PU471J
R 855 RD1/4PU223J
R 856 RD1/4PU223J
R 857 RD1/4PU223J
R 858 RD1/4PU223J
R 859 RN1/4PC1002D
R 860 RN1/4PC1002D
R 861 RN1/4PC1002D
R 862 RN1/4PC1002D
R 863 RN1/4PC1002D
R 864 RN1/4PC1002D
R 865 RN1/4PC1002D
R 866 RN1/4PC1002D
R 871 RN1/4PC1002D
R 872 RN1/4PC1002D
R 873 RN1/4PC1002D
R 874 RN1/4PC1002D
R 875 RN1/4PC1002D
R 876 RN1/4PC1002D
R 877 RN1/4PC1002D
R 878 RN1/4PC1002D
R 879 RD1/4PU223J
R 880 RD1/4PU223J
R 883 RD1/4PU821J
R 884 RD1/4PU821J
R 885 RD1/4PU472J
R 886 RD1/4PU222J
R 887 RD1/4PU472J
R 889 RD1/4PU472J
R 901 RD1/4PU563J
R 902 RD1/4PU563J
R 903 RD1/4PU563J
R 904 RD1/4PU563J
R 905 RD1/4PU564J
R 906 RD1/4PU564J
R 907 RD1/4PU564J
R 908 RD1/4PU564J
R 909 RD1/4PU473J
=====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- ------------------------- =====Circuit Symbol and No.===Part Name Part No. --- ------ --------------------------------------------- -------------------------

17
GM-X624, GM-X524
R 910 RD1/4PU473J
R 911 RD1/4PU473J
R 912 RD1/4PU473J
R 917 RD1/4PU104J
R 918 RD1/4PU472J
R 919 RD1/4PU103J
R 920 RD1/4PU222J
R 921 RD1/4PU472J
R 922 RD1/4PU221J
R 923 RD1/4PU222J
R 924 RD1/4PU563J
R 930 RD1/4PU331J
R 931 RD1/4PU331J
CAPACITORS
C 101 CCPUSL470J50
C 102 CCPUSL470J50
C 103 CCPUSL470J50
C 104 CCPUSL470J50
C 105 CFTLA104J50
C 106 CFTLA104J50
C 107 CFTLA104J50
C 108 CFTLA104J50
C 109 CFTLA104J50
C 110 CFTLA104J50
C 111 CFTLA104J50
C 112 CFTLA104J50
C 301 CEAS100M16
C 302 CEAS100M16
C 303 CEAS100M16
C 304 CEAS100M16
C 305 CKPUYB221K50
C 306 CKPUYB221K50
C 307 CKPUYB221K50
C 308 CKPUYB221K50
C 309 CQMA471J50
C 310 CQMA471J50
C 311 CQMA471J50
C 312 CQMA471J50
C 313 CFTLA104J50
C 314 CFTLA104J50
C 315 CFTLA104J50
C 316 CFTLA104J50
C 317 CEAS101M10
C 318 CEAS101M10
C 319 CEAS101M10
C 320 CEAS101M10
C 321 CMA220J2H
C 322 CMA220J2H
C 323 CMA220J2H
C 324 CMA220J2H
C 325 CMA100J2H
C 326 CMA100J2H
C 327 CMA100J2H
C 328 CMA100J2H
C 329 CFTLA223J50
C 330 CFTLA223J50
C 331 CFTLA223J50
C 332 CFTLA223J50
C 337 CMA100J2H
C 338 CMA100J2H
C 339 CMA100J2H
C 340 CMA100J2H
C 341 CMA100J2H
C 342 CMA100J2H
C 343 CMA100J2H
C 344 CMA100J2H
C 345 CFTLA333J50
C 346 CFTLA333J50
C 347 CFTLA333J50
C 348 CFTLA333J50
C 349 CQMA102J50
C 350 CQMA102J50
C 351 CQMA102J50
C 352 CQMA102J50
C 601 CFTLA103J50
C 602 CFTLA224J50
C 603 CFTLA103J50
C 604 CFTLA103J50
C 605 CFTLA103J50
C 606 CFTLA103J50
C 607 CEAS100M16
C 608 CEAS100M16
C 609 CEAS101M16
C 611 CEAS220M50
C 612 CEAS471M16
C 613 CFTLA103J50
C 614 CFTLA103J50
C 615 CEAS100M16
C 616 CEAS221M10
C 617 CQMA102J50
C 618 CFTLA105J50
C 619 CEAS470M50
C 620 CQMA472J50
C 621 CQMA472J50
C 623 4700µF/16V CCH1206
C 624 4700µF/16V CCH1206
C 625 CQPA102G2A
C 626 3300µF/35V CCH1205
C 627 3300µF/35V CCH1205
C 628 3300µF/35V CCH1205
C 629 3300µF/35V CCH1205
C 631 CEAS471M35
C 632 CEAS471M35
C 633 CEASR10M50
C 634 CEASR10M50
C 635 CEAS470M50
C 636 CEAS470M50
C 641 CFTLA564J50
C 851 CEAS100M16
C 852 CEAS100M16
C 853 CEAS100M16
C 854 CEAS100M16
C 855 CQMA472J50
C 856 CQMA472J50
C 857 CQMA472J50
C 858 CQMA472J50
C 859 CCPUSL470J50
C 860 CCPUSL470J50
C 861 CCPUSL470J50
C 862 CCPUSL470J50
C 863 CCPUSL470J50
C 864 CCPUSL470J50
C 865 CCPUSL470J50
C 866 CCPUSL470J50
C 875 CKPUYB471K50
C 876 CKPUYB471K50
C 877 CKPUYB471K50
C 878 CKPUYB471K50
C 879 CKPUYB471K50
C 880 CKPUYB471K50
C 881 CEAS4R7M50
C 882 CEAS4R7M50
C 883 CCPUSL470J50
C 901 220µF/10V CCH1036
=====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- ------------------------- =====Circuit Symbol and No.===Part Name Part No.
--- ------ --------------------------------------------- -------------------------

18
GM-X624, GM-X524
6. ADJUSTMENT
There is no information to be shown in this chapter.
7. GENERAL INFORMATION
7.1 IC
PA2027A
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
VCC
Stby
DET1
DET2
DET_R
GND
NC
NC
IN1
IN2
IN3
Cont_V
Filter
Vs_out
TC
Mute_out
+
-
zz
2V
+
-
zz
2V
+
-
zz
2V
+
-
2V
zz
+
-
2V
20µA
+
-
zz
2V
+
-
zz
50µA
4.7kΩ
Bandgap
Over-voltage
detect
Circuit's
movement:on
+
-
5.6V
+
-
QS
R
Oneshot
(1µsec)
Bandgap:on
Switch:on
0.13V

19
GM-X624, GM-X524
7.2 DISASSEMBLY
-Removing the Amp Unit
1. Remove four screws B.
2. Remove twelve screws C and Amp Unit.
-Removing the Case and the Panel Unit
1. Remove seventeen screws A.
2. Remove Case and two Panel Units.

20
GM-X624, GM-X524
8. OPERATIONS AND SPECIFICATIONS
-SETTING THE UNIT
Gain Control
Adjusting the gain controls A and B will help match the output of the car stereo to the Pioneer amplifier. Normally, set the switch 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.
• Set the gain control to “NORMAL”
when this amplifier is connected to a Pioneer car stereo with RCA output jacks. If the sound level is too low or distorts, adjust the gain control.
• Adjust the gain control to the “MIN”
side of “NORMAL” when this ampli- fier is connected to a Pioneer car stereo (High voltage output type).
Power Indicator
The power indicator lights when the power is switched on.
RCA Input Select Switch
For two-channel input, slide this switch to the left. For four-channel input, slide this switch to the right.
Cut Off Frequency Control
If the LPF/HPF select switch is set to LPF or HPF, you can select a cut off
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF 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 Select Audio frequency range Speaker Remarks Switch to be output Type
LPF (left) * — 50 to 120 Hz Sub-woofer Connect a sub-woofer. OFF (center) Full range Full range HPF (right) * 50 to 120 Hz — Full range Use if you want to cut the
very-low-frequency range*
because it is not necessary
for the speakers you are using.
* See the “Cut Off Frequency Control” section.