NAD T 785 Service Manual

3
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 Database Part Number Description
F8001*AH 20-001-0078-90 FUSE TIME-LAG 10A/250VAC 5X20mm
UL/CSA 5T
F8001*C,CT
20-001-0078-90 FUSE TIME-LAG 10A/250VAC 5X20mm
UL/CSA 5T
F8002*AH 20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC
5x20mm TSD UL/CSA/VDE/SEMKO
F8002*C,CT
20-001-0069-90 FUSE TIME-LAG 800mA 250V 5x20mm
TSD UL/CSA/VDE/CCC WALTER
5X20mm VDE/UL/CSA 5T
NOTE:
<*AH > : USA, CANADIAN MODEL ONLY.
<*C, *CT > : 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.
CONTENTS
DESCRIPTION PAGE
SPECIFICATIONS ..............................................................................................................................4 - 5
REAR PANEL / FRONT PANEL VIEW ...................................................................................................6
DISASSEMBLY INSTRUCTIONS ...........................................................................................................7
WIRING DIAGRAM ............................................................................................................................8 - 9
BLOCK DIAGRAM.................................................................................................................................10
SPECIAL FUNCTION ...........................................................................................................................11
DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING................................................12-15
ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT ..................................................16-17
PCB LAYOUT ...................................................................................................................................18-41
SCHEMATIC DIAGRAM ...................................................................................................................42-69
ELECTRICAL PARTS LIST ..............................................................................................................70-95
IC BLOCK DIAGRAM .....................................................................................................................96-120
EXPLODED VIEW ........................................................................................................................121-122
EXPLODED VIEW PARTS LIST ..................................................................................................123-126
SINGLE CHANNEL SERVICE KIT ..............................................................................................127-128
PACKING DIAGRAM ...........................................................................................................................129

NAD T 785 Specifications

General

Brand	NAD
Model	T 785
Category	Receiver
Language	English