Circuit Diagrams; Smps (Power) Circuit Diagram - NAD M56 Service Manual

CIRCUIT DIAGRAMS

1. SMPS CIRCUIT DIAGRAM
No Power
BD101,R101 is Defective
S/W Error
IC101,IC104 is Defective
No Power
F101 is Defective
A B C D
No Power
D102 is Defective
Switching Error
IC102,IC103 are Defective
E F G H I
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IMPORTANT SAFETY
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE NAD CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
SPECIAL COMPONENTS ARE SHADED ON THE
VFD No Power
D126 is Defective
13VA No Power
D122 is Defective
5V NoPower
IC152 are Defective
5.3VA No Power
D124 is Defective
12VA No Power
D121 is Defective
3.3VA No Power
D123 is Defective
3.3V NoPower
IC153 are Defective
J K L M
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NOTE :
SCHEMATIC FOR EASY IDENTIFICATION. THIS 1. Shaded( ) parts are critical for safety. Replace only
CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER
FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter
IMPLEMENTATION OF THE LATEST SAFETY AND
WITH TYPES PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
12V NoPower
IC154 are Defective
12V NoPower
IC151 are Defective
N O P Q
with specified part number.
during Play mode.
R S T