TABLE OF CONTENTS Notes on chip component replacement • Never reuse a disconnected chip component. • Notice that the minus side of a tantalum capacitor may be 1. SERVICE MODE ............. 3 damaged by heat. 2. GENERAL ................4 3. DISASSEMBLY 3-1.
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SECTION 1 SERVICE NOTE Clearing the Protector During Repairs • OVER CURRENT : Detects overcurrent during output. • OFF SET : Detects DC offset at the speaker terminal. 1. Clearing the OVER CURRENT protector • When the position of the MODE switch (S801/power board) is set to HI-CURRENT : Cut the jumper wire JW230 of the amplifier board.
SECTION 4 SECTION 3 DISASSEMBLY ELECTRICAL ADJUSTMENT Note: Follow the disassembly procedure in the numerical order given. IDLING CURRENT ADJUSTMENT 4 Bottom plate 3-1. SIDE PLATE,SUB 1/SUB 2 AND FILTER BOARD • Perform adjustments in the HI-VOLTAGE mode. 1 Three screws 1 Adjustment point (BTP3x8) Semi-fixed resistors VR101, VR201, VR301, VR401, VR501,...
XM-7557 5-3. BLOCK DIAGRAM – SUB 1/SUB 2 SECTION – THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) SUB 1 BOARD CNJ711 CNJ709 CNP709 SUB 1 For schematic diagrams.
SECTION 7 AMPLIFIER ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the parts list • SEMICONDUCTORS When indicating parts by reference In each case, u: µ , for example: may be different from the parts specified in the number, please include the board uA...: µ...
XM-7557 US Model Canadian Model SERVICE MANUAL AEP Mode UK Model E Model Ver 1.0 1999. 10 SUPPLEMENT-1 File this supplement with the service manual. Subject: 1. CHANGE OF DISASSEMBLY 2. CHANGE OF EXPLODED VIEWS 3. CHANGE OF ELECTRICAL PARTS LIST 4.
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1. CHANGE OF DISASSEMBLY : Changed portion Page 3-2. AMPLIFIER/POWER BOARD AND LED BOARD 3 Six screws !™ Six screws 6 Three screws (BVTP3x14) (P3x10) (BTP3x8) 2 Four screws (P4x40) 4 Two Retainers !¶ Three brackets (POWER) !¢ Sub heat sink (Amplifier) !§...
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2. CHANGE OF EXPLODED VIEWS : Changed portion Page New Type Former Type Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 66 3-042-419-01 BRACKET (POWER) not supplied #4 #4 (Including Ref No.62 ) (Including Ref No.55 ) (Including Ref No.55 ) (Including...
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3. CHANGE OF ELECTRICAL PARTS LIST : Changed portion Page Former Type New Type Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C113 1-102-959-61 CERAMIC 22PF C113 1-102-508-11 CERAMIC 10PF 0.5PF C213 1-102-508-11 CERAMIC 10PF 0.5PF C213 1-102-959-61 CERAMIC 22PF...
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XM-7557 4. CHANGE OF DIAGRAMS • BLOCK DIAGRAM – AMPLIFIER SECTION – LINE SWITCH DIRECT Q102 SW703 SPEAKER OUT DIFFERENTIAL POWER AMP CN704 LOWBOOST (VOLTAGE STAGE) LINE SWITCH PRE AMP H.P.F H.P.F L.P.F L.P.F CNJ702 IC701 Q104-105 Q108 Q103 LEVEL...
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XM-7557 • BLOCK DIAGRAM – POWER SECTION – POWER BOARD LED BOARD D803 D804 D805 MODE HI-C HI-V THERMAL OVER CURRENT OFFSET S801 CNB805 CNP804 OFFSET LED OFFSET CONTROL Q809-810 Q804 D801 D802 D806 AMPLIFIER HI-VOLTAGE HI-CURRENT BOAD CNP805 MUTE CONTROL...
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XM-7557 US Model Canadian Model SERVICE MANUAL AEP Model UK Model E Model Ver 1.1 2004. 04 SUPPLEMENT-2 File this supplement with the service manual. Subject : Change of Amplifier Board 9-926-590-84...
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XM-7557 When performing service and inspection, check the suffix of the part nimber if the amplifier board. 1. DISCRIMINATION – AMPLIFIER BOARD (COMPONENT SIDE) – New type : 1-675-264-14...
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XM-7557 ELECTRICAL PARTS LIST NOTE: Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks • Due to standardization, replacements in the • RESISTORS The components identified by mark 0 C534 1-126-008-51 ELECT 47uF < CONNECTOR > parts list may be different from the parts All resistors are in ohms.
XM-7557 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 1999.06...