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Pioneer GM-X624 Service Manual

Bridgeable four-ch channel power amplifier
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ervice
M anua l
BRIDGEABLE FOUR-CH CHANNEL POWER AMPLIFIER
GM-X624
GM-X524

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.
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
PIONEER ELECTRONIC CORPORATION
PIONEER ELECTRONICS SERVICE INC.
PIONEER ELECTRONIC [EUROPE] N.V.
PIONEER ELECTRONICS ASIACENTRE, PTE.LTD. 501 Orchard Road, #10-00, Wheelock Place, Singapore 238880
C PIONEER ELECTRONIC CORPORATION 1998
GM-X624/X1R/UC
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
X1R/UC, ES, EW
X1R/UC
6. ADJUSTMENT..........................................................18
7. GENERAL INFORMATION .......................................18
7.1 IC .........................................................................18
7.2 DISASSEMBLY ...................................................19
8. OPERATIONS AND SPECIFICATIONS.....................20
K-ZEU. APR. 1998 Printed in Japan
ORDER NO.
CRT2202

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  Summary of Contents for Pioneer GM-X624

  • Page 1: Table Of Contents

    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...
  • Page 2: Exploded Views And Parts List

    GM-X624, GM-X524 2. EXPLODED VIEWS AND PARTS LIST 2.1 PACKING 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 Part No.
  • Page 3 GM-X624, GM-X524 2.2 EXTERIOR...
  • Page 4 22 Clamper HNV0015 23 Fuse(20A) HEK0020 24 Pin Jack(CN853) HKB0002 25 Pin Jack(CN851) HKB0004 (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...
  • Page 5 GM-X624, GM-X524...
  • Page 6: Schematic Diagram

    GM-X624, GM-X524 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”. Large size SCH diagram ISOLATOR BUFFER AMP Guide page 20k(E) 20k(E)
  • Page 7 GM-X624, GM-X524 AMP UNIT : AUDIO SIGNL POWER CONTROL /MUTE 0.1V HEK0020 3.2V 0.3V 0.2V HEK0020 14.4V 14.2V 10.7V 0.2V 14.4V Fig. 3...
  • Page 8 GM-X624, GM-X524...
  • Page 9 GM-X624, GM-X524...
  • Page 10 GM-X624, GM-X524...
  • Page 11 GM-X624, GM-X524...
  • Page 12: Pcb Connection Diagram

    GM-X624, GM-X524 4. PCB CONNECTION DIAGRAM 4.1 AMP UNIT 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.
  • Page 13 GM-X624, GM-X524 SIDE A...
  • Page 14: Electrical Parts List

    =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ --------------------------------------------- ------------------------- ------ --------------------------------------------- ------------------------- Transistor 2SC2458 Transistor 2SC2458 Unit Number : HWH0048(GM-X624/X1R/UC) HWH0046(GM-X624/X1R/ES) Transistor 2SC2458 Transistor 2SA1048 HWH0045(GM-X624/X1R/EW) Transistor 2SA992 HWH0047(GM-X524/X1R/UC) Unit Name : Amp Unit Transistor 2SA992...
  • Page 15 GM-X624, GM-X524 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ --------------------------------------------- ------------------------- ------ --------------------------------------------- ------------------------- Diode 1SS133 RD1/4PU123J Diode 1SS133 RD1/4PU123J Diode 1SS133 RD1/4PU123J Diode 1SS133 RD1/4PU103J Diode RM4Z RD1/4PU103J Diode HZS7L(B2) RD1/4PU103J...
  • Page 16 GM-X624, GM-X524 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ --------------------------------------------- ------------------------- ------ --------------------------------------------- ------------------------- RD1/4PU223J RD1/4PU272J RD1/4PU223J RD1/4PU272J RD1/4PU472J RD1/4PU472J RD1/4PU472J RD1/4PU820J RD1/4PU472J RD1/4PU820J RD1/4PU472J RD1/4PU472J RD1/4PU101J RD1/4PU472J RD1/4PU101J RD1/4PU820J RD1/4PU101J RD1/4PU820J...
  • Page 17 GM-X624, GM-X524 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ --------------------------------------------- ------------------------- ------ --------------------------------------------- ------------------------- RD1/4PU473J CFTLA333J50 RD1/4PU473J CQMA102J50 RD1/4PU473J CQMA102J50 RD1/4PU104J CQMA102J50 RD1/4PU472J CQMA102J50 RD1/4PU103J CFTLA103J50 RD1/4PU222J CFTLA224J50 RD1/4PU472J CFTLA103J50 RD1/4PU221J CFTLA103J50...
  • Page 18: Adjustment

    GM-X624, GM-X524 6. ADJUSTMENT There is no information to be shown in this chapter. 7. GENERAL INFORMATION 7.1 IC PA2027A Over-voltage detect Stby Bandgap DET1 Circuit's movement:on DET2 Cont_V 50µA DET_R Filter 4.7kΩ Bandgap:on Switch:on Vs_out 0.13V Mute_out 5.6V Oneshot...
  • Page 19: Disassembly

    GM-X624, GM-X524 7.2 DISASSEMBLY - Removing the Case and the Panel Unit 1. Remove seventeen screws A. 2. Remove Case and two Panel Units. - Removing the Amp Unit 1. Remove four screws B. 2. Remove twelve screws C and Amp Unit.
  • Page 20: Operations And Specifications

    GM-X624, GM-X524 8. OPERATIONS AND SPECIFICATIONS - SETTING THE UNIT...
  • Page 21 GM-X624, GM-X524...

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