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Service
Manual
BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER
GM-X374
For details, refer to "Important symbols for good services".
PIONEER CORPORATION
PIONEER ELECTRONICS (USA) INC.
PIONEER EUROPE NV
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2002
GM-X374/XR/UC
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
BRIDGEABLE
4-CH POWER AMPLIFIER
FUSE 25A
25
XR/UC,XR/EW,XR/ES
K-ZZY. NOV. 2002 Printed in Japan
ORDER NO.
CRT3007
Table of Contents
Related Manuals for Pioneer GM-X374XR/UC
Summary of Contents for Pioneer GM-X374XR/UC
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Page 1: Service Manual
PIONEER ELECTRONICS (USA) INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936 C PIONEER CORPORATION 2002 K-ZZY. NOV. 2002 Printed in Japan... -
Page 2: Safety Information
SAFETY INFORMATION - GM-X374/XR/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. -
Page 3: Table Of Contents
CONTENTS SAFETY INFORMATION ..........2 6. ADJUSTMENT............20 1. SPECIFICATIONS............3 7. GENERAL INFORMATION ........21 2. EXPLODED VIEWS AND PARTS LIST .......4 7.1 DIAGNOSIS ............21 2.1 PACKING...............4 7.1.1 DISASSEMBLY .........21 2.2 EXTERIOR .............6 7.1.2 ..22 CONNECTOR FUNCTION DESCRIPTION 3. SCHEMATIC DIAGRAM ..........8 7.2 IC ................23 ..8 8. -
Page 4: Exploded Views And Parts List
2. EXPLODED VIEWS AND PARTS LIST 2.1 PACKING GM-X374/XR/UC... -
Page 5: Gm-X374/Xr/Uc
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. - For the applying amount of lubricants or glue, follow the instructions in this manual. ( In the case of no amount instructions, apply as you think it appropriate.) - PACKING SECTION PARTS LIST Mark No. -
Page 6: Exterior
2.2 EXTERIOR GM-X374/XR/UC... -
Page 7: Gm-X374/Xr/Uc
- EXTERIOR SECTION PARTS LIST Mark No. Description Part No. 1 Screw BBZ30P060FZK 2 Screw BBZ30P160FZK 3 Chassis HNA0014 4 Panel HNB0188 5 Panel HNB0193 6 Case HNB0195 7 Spacer HNM0006 8 Spacer HNM0124 9 Heat Sink HNR0232 10 Amp Unit(UC) HWH0208 Amp Unit(EW) HWH0209... -
Page 8: Schematic Diagram
3. SCHEMATIC DIAGRAM 3.1 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) AMP UNIT Large size SCH diagram GAIN = 1 Guide page Detailed page GAIN = -12dB INPUT SELECT GAIN = 1 UC ONLY EW, ES ONLY BEADS CORE (EW, ES ONLY) 75µH 75µH EW, ES ONLY BEADS CORE... -
Page 9: Gm-X374/Xr/Uc
AMPLIFIER GAIN = 5.2 - 35.4dB HPF/LPF SELECT 10kΩ(A) 10kΩ(A) HPF/LPF SELECT 10kΩ(A) 10kΩ(A) R608 R609 1R3K 1R3K EW, ES 6R2K 6R2K EW, ES ONLY EW, ES ONLY 50µH FU602 HEK0030 > UC ONLY NOTE : Symbol indicates a resistor. Decimal points for resistor No differentiation is made between chip resistors and and capacitor fixed values... -
Page 10: Gm-X374/Xr/Uc
GM-X374/XR/UC... -
Page 11: Gm-X374/Xr/Uc
GM-X374/XR/UC... -
Page 12: Gm-X374/Xr/Uc
GM-X374/XR/UC... -
Page 13: Gm-X374/Xr/Uc
GM-X374/XR/UC... -
Page 14: Pcb Connection Diagram
4. PCB CONNECTION DIAGRAM 4.1 AMP UNIT NOTE FOR PCB DIAGRAMS AMP UNIT 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 15: Gm-X374/Xr/Uc
SIDE A FU602 POWER SUPPLY SPEAKER OUTPUT GM-X374/XR/UC... -
Page 16: Gm-X374/Xr/Uc
AMP UNIT GM-X374/XR/UC... -
Page 17: Gm-X374/Xr/Uc
SIDE B GM-X374/XR/UC... -
Page 18: Electrical Parts List
5. ELECTRICAL PARTS LIST NOTES: - 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. -
Page 19: Gm-X374/Xr/Uc
=====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RD1/4PU473J RN1/10SE1002D RS1/2PMF100J RN1/10SE1002D RS1/2PMF100J RN1/10SE1002D RD1/4PU473J RN1/10SE1002D RD1/4PU473J RN1/10SE1002D RS1/16S223J RN1/10SE1002D RS1/16S223J RN1/10SE1002D RS1/16S561J RS1/16S753J RS1/16S561J RS1/16S753J RD1/4PU473J RS1/16S753J RD1/4PU473J RS1/16S753J RS1/2PMF100J... -
Page 20: Adjustment
=====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CEAT101M50 CQMA102J50 CEAT220M50 2200µF/35V HCH0010 CEAT220M50 2200µF/35V HCH0010 CFTNA104J50 2200µF/35V HCH0010 CFTNA104J50 2200µF/35V HCH0010 CFTNA104J50 CQMA103J50 CFTNA104J50 CCSRCH471J50 CFTNA333J50 CCSRCH471J50 CFTNA333J50 CEAT100M16 CQMA102J50... -
Page 21: General Information
7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DISASSEMBLY Removing the Case (not shown) 1. Remove the eight screws and then remove the Case. Panel Removing the Amp Unit (Fig.1) Remove the eight screws. Remove the two screws and then remove the two Panels. Remove the eight screws and then remove the two Heat Sinks. -
Page 22: Connector Function Description
7.1.2 CONNECTOR FUNCTION DESCRIPTION - GM-X374/XR/UC 6.5V 0.2V 6.5V 0.2V BRIDGEABLE 4-CH POWER AMPLIFIER FUSE 30A GM-X374/XR/UC... - Page 23 7.2 IC *TDA7294V MUTE THERMAL STBY SHUTDOWN PROTECTION IC's marked by * are MOS type. Be careful in handling them because they are very liable to be damaged by electrostatic induction. GM-X374/XR/UC...
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Page 24: Operations
8. OPERATIONS GM-X374/XR/UC... -
Page 25: Connection Diagram
Connection Diagram Ground wire (black) [RD-223] (sold separately) Connect to metal body or chassis. Fuse (30 A) 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.