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T977 C/AH
SEVEN CHANNEL AMPLIFIER
SERVICE MANUAL

T977 C/AH

SEVEN CHANNEL AMPLIFIER
CONTENTS
FRONT PANEL/REAR PANEL VIEW3

SPECIFICATIONS 4
ALIGNMENT PROCEDURE/ALIGNMENT POINTS 5-6
WIRING DIAGRAM 7
SCHEMATIC DIAGRAM8-15

PCB LAYOUT 16-21
ELECTRICAL PARTS LIST22-37

EXPLODED VIEW 38

EXPLODED VIEW PARTS LIST39

PACKING DIAGRAM40

SERVICE SAFETY PRECAUTIONS
1. Replacing the Fuses

CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE
REPLACE ONLY WITH SAME TYPE OF FUSE.

REFERENCE NO. PART NUMBER DESCRIPTION
Rear Panel
AH 20-11203-10 MDA T20AL/250V
C 20-12103-20 MDA T10AL/250V

AMP Board
F101/F102 20-12632-00 T6.3AL/250V

PSU Board
F201-F204 20-12162-01 T1.6AL/250V

NOTE:
*AH : North American version only
*C : European version only

2. Safety-check out (North American model only)
Before returning the product to the customer, make leakage current or
resistance measurements to determine that exposed parts are acceptably
insulated from the supply circuit.

Parts marked with the symbol are critical with regard to the risk of fire and
electric shock.Replace only parts recommended by the manufacturer.

-2-
-3-
SPECIFICATIONS

CONTINUOUS AVERAGE POWER 140 W (21.5 dBW)
OUTPUT INTO 8 OHMS OR 4 OHMS
(Min. power per channel, 20 Hz