Yamaha DVD-S540 Service Manual page 18

DVD-S540/DV-S5650
B
When read disc,
Laser on OK ?
Yes
Load a disc ?
Yes
Focus on OK ?
Yes
Disc ID correct ?
Yes
Spindle on OK ?
C
18
Signal
No
LDO1 and LDO2 are
normal ?
Yes
Voltage of
TP22 &TP24
OK ?
No
Laser off
Any signal
No
on pins A B C D E F
of MT1336E
Yes
Signal FEO
(pin 18 of MT1336E)
correct ?
Yes
Check the circuit from
Pin18 of MT1336E to Pin 205
of MT1379BE
Signal of
No
Pin 19 (RFL) of MT1336E
normal ?
Yes
Check the circuit from
Pin 19 of MT1336E to Pin 206
of MT1379BE
DMSO
No
(pin 18 of MT1379BE)
normal ?
Yes
Signal SP+
(Pin 11 of BA5954) & SP-
(Pin 12 of BA5954)
correct ?
Yes
Check the connection
between spindle driver and
BA5954
Check the peripheral
circuit of MT1336E
No
Check the peripheral
circuit of two transistor
(Ref 7620 & 7621)
Check the peripheral
No
circuit of two transistor
(Ref 7620 & 7621)
Check the circuit to
Yes
connect DVD mechanism
or Optical Pick Up maybe damaged
No
Check the circuit between
Optical Pick Up and MT1336E
No
Check the peripheral
circuit of MT1336E
Check the peripheral
No
circuit of MT1336E and
itself.
No
Check MT1379BE and its
peripheral circuit.
Check BA5954 (motor
No
driver) and its peripheral
circuit
Board Ref
MONO 7602
MONO 7603
MONO 7606
Name
MT1336E
BA5954
MT1379BE