Service Manuals, User Guides, Schematic Diagrams or docs for : NAD T T-773 T-773

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                                         DRAFT DATE: 1 MAR 2004




SERVICE MANUAL
T 773                               NAD




                                T 773
                 A/V Receiver




                                 A/V Receiver
SAFETY INFORMATION




        AH VERSION




        C VERSION




                     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                                      33-0321111-00-88                         FUSE 20A/250VAC SLOW BLOW 6X32mm
                                                                                      6S UL/CSA
F751*C                                       33-0161006-00-88                         FUSE 10A/250VAC TIME-LAG 5X20mm
                                                                                      5D VDE/UL/CSA
F752*AH                                      33-0111006-00-88                         FUSE 1.6A 250V TIME LAG 5x20mm 5T
                                                                                      UL/CSA/VDE/SEMKO
F752*C                                       33-0151006-00-88                         FUSE 800mA 250V TIME LAG 5x20mm
                                                                                      5T 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
SPECIAL FUNCTION .......................................................................................................................... 10
DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING .................................................... 10
ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT ....................................................... 11
PCB LAYOUT ............................................................................................................................... 12 - 25
SCHEMATIC DIAGRAM ............................................................................................................... 26 - 45
IC BLOCK DIAGRAM ................................................................................................................... 46 - 54
EXPLODED VIEW ........................................................................................................................ 55 - 57
EXPLODED VIEW PARTS LIST................................................................................................... 58 - 59
ELECTRICAL PARTS LIST .......................................................................................................... 60 - 73
PACKING DIAGRAM .......................................................................................................................... 74
VERSION HISTORY .......................................................................................................................... 75




                                                                        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/BS)        0.1 %

Input Sensitivity         (ref. 8 ohms, 1 kHz)                                             166 

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