Yamaha DV-SL100 Service Manual page 14

DV-SL100
A
Does the tray
automatically close when
it is open?
Yes
Sled automatically
moves to inside when
it is in outside ?
Yes
Does
the Optical Pick Up move to find
a disc ?
Yes
B
14
Signal TROUT
No
(Pin 48 of MT1336E) and
TRIN (Pin 47 of MT1336E)
is correct ?
Yes
Signal
TRCLOSE & TROPEN
correct ?
Yes
Signal
LOAD+ & LOAD-
correct ?
Yes
Check the circuits connecting
to the DVD mechanism
Signal
No
STBY (Pin 28 of BA5954) is
high level ?
Yes
Signal FMSO
(Pin 23 of BA5954) is more
than 1.4V ?
Yes
Signal SL+
(Pin 17 of BA5954) & SL-
(Pin 18 of BA5954)
correct ?
Yes
Check the copper trace or
cable connect to DVD mechanism
Has
No
FOSO (Pin 1 of BA5954)
any signal ?
Yes
Signal
F+ (TP13) & F- (TP1)
correct ?
Yes
Check the cable and
circuit between DVD mechanism
and BA5954
No
Check the position-switch
on DVD mechanism
No
Check the circuit between
MT1336E and BA5954
No
Check BA5954 and peripheral
No
Check the STBY circuit
No
Check the FMSO circuit
No
Check the BA5954
1. Check the signal from
No
MT1379BE to BA5954;
2. Maybe MT1379BE is not
working
Check the peripheral
No
circuit of BA5954
Board Ref Name
MONO 7602 MT1336E
MONO 7603 BA5954
MONO 7606 MT1379BE