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DRAFT DATE: 08 OCT, 2002
SERVICE MANUAL
T 752 NAD
AV SURROUND
SOUND RECEIVER
T 752
AV SURROUND
SOUND RECEIVER
SAFETY INFORMATION
2
SERVICE SAFETY PRECAUTIONS
1. Replacing the fuses
CAUTION:
FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF
FUSE.
Reference Designator Part Number Description
F751*AH 33-0160001-00-48 Fuse 8A 250V Time Lag 5x20 MM UL/CSA
F751*C 33-0131002-00-48 Fuse 5A 250V Time Lag 5x20 MM SEMKO/VDE
F752*AH 33-0111006 -00-48 Fuse 1.6A 250V Time Lag 5x20 MM
UL/CSA/VDE/SEMKO
F752*C 33-0151006 -00-48 Fuse 800mA 250V Time Lag 5x20 MM
UL/CSA/VDE/SEMKO
NOTE:
<*AH > : USA, CANADIAN MODEL ONLY.
<*C > : EUROPEAN MODEL ONLY.
2. Safety check out
(Only U.S.A. model)
Before returning the product to the customer, make leakage current or resistance measurements to determine
that exposed parts are acceptably insulated from supply circuit.
Parts marked with the symbol are critical with regard to the risk of fire and electric shock.
Replace only with parts recommended by the manufacturer.
CONTENTS
DESCRIPTION PAGE
SPECIFICATIONS ........................................................................................................................... 4 - 5
REAR PANEL / FRONT PANEL VIEW ................................................................................................. 6
DISASSEMBLY INSTRUCTIONS ......................................................................................................... 7
WIRING DIAGRAM ............................................................................................................................... 8
BLOCK DIAGRAM ................................................................................................................................ 9
ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT ..................................................... 10
PCB LAYOUT ............................................................................................................................... 11 - 23
SCHEMATIC DIAGRAM .............................................................................................................. 24 - 36
IC BLOCK DIAGRAM ................................................................................................................... 37 - 45
EXPLODED VIEW .............................................................................................................................. 46
EXPLODED VIEW PARTS LIST .................................................................................................. 47 - 48
ELECTRICAL PARTS LIST .......................................................................................................... 49 - 58
PACKING DIAGRAM .......................................................................................................................... 59
3
SPECIFICATIONS
POWER AMPLIFIER SECTION
Rated distortion (Rated power level into 8 ohms, THD 20 Hz-20 kHz FL/C/FR) 0.1 %
(Rated power level into 8 ohms, THD 20 Hz-20 kHz SL/SR) 0.1 %
Input Sensitivity (ref. 8 ohms, 1 kHz) 200