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CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM
No Power
12
D105~D108 is Defective
11
10
9
8
7
Switching Error
IC101is Defective
6
No Power
FR101 is Defective
5
4
3
2
NOTE)
Warning
1
NOTES)
Symbol denotes AC ground.
NOTE)
Parts that are shaded are critical
NOTE)
With respect to risk of fire or
NOTES)
Symbol denotes DC chassis ground.
NOTE)
electricial shock.
A
B
C
D
5.6VA No Power
D123 is Defective
Switching Error
IC102,IC103 are Defective
OPTIONAL PART
E
F
G
H
I
3-29
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE NAD ELECTRONICS CORPORATION. ALL
COMPONENTS SHOULD BE REPLACED ONLY WITH
TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
14VA No Power
D125 is Defective
5.0V No Power
Q126 is Defective
5.6V No Power
Q125 is Defective
3.3V No Power
Q121 is Defective
3.3VA No Power
D121 or D122 are Defective
J
K
L
M
3-30
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE
NOTE :
SCHEMATIC FOR EASY IDENTIFICATION.
1. Shaded( ) parts are critical for safety. Replace only
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
with specified part number.
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,
2. Voltages are DC-measured with a digital voltmeter
IMPLEMENTATION OF THE LATEST SAFETY AND
during Play mode.
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
12V No Power
Q123 is Defective
N
O
P
Q
R
S
T
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