NAD T517AHT, Service Manual

Page: 21 / 78

3-8
NO NO
YES
Check the connection
line of STBY signal.
NO
YES
Check the related
circuit of FMSO.
NO
YES
Check the amp circuit
on motor driver.
Check the cable
connection with MECHA.
Do not put in
disc and tray close.
YES
YES
Check cable connect on
with pick-up head.
YES
YES
Motor
driver STBY pin
is high?
Is FMSO
DC level higher
than 1.4V?
SL+
and SL- output
properly?
Does
the SLED move
to inner side when it is
at outter position?
NO NO
Check FOSO connection on
MT1389S and motor dirver.
Proper
FOSO outputs to
motor driver?
NO
Check the amp circuit
on motor dirver.
Proper
F+ & F-
outputs?
Optical Lens
has movements for
searching
focus?
B
C
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