Philips DVD727K Service Manual page 28

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B
When read disc,
Laser ON OK?
Load a disc?
Focus On ok?
Disc ID correct?
Spindle on OK?
N
Y
N
Y
N
Y
N
Y
N
C
Signal
LDO1 and LDO2 is
normal?
Y
Voltage of
TP22 &TP24
OK?
Laser off
Any signal
on pins A B C D E F
of MT1366
Y
Signal FEO
(pin18 of MT1336)
correct?
Y
Check the circuit from
Pin18 of MT1336 to Pin205
of MT1379
Signal of
Pin 19 (RFL) of MT1336
normal?
Y
Check the circuit from
Pin19 of MT1336 to Pin206
of MT1379
DMSO
(pin18 of MT1379)
normal?
Y
Signal
SP+ & SP-
correct?
Y
Check the connection
between spindle driver and
BA5945
28
Check the peripheral
circuit of MT1366
N Check the peripheral
circuit of two transistor
(item 7620 & 7621)
Check the peripheral
N circuit of two transistor
(item 7620 & 7621)
Check the circuit to
Y connect LOADER
OPU maybe damaged
Check the circuit between
N
Loader and MT1336
Check the peripheral
N
circuit of MT1336
Check the peripheral
N circuit of MT1336 and
itself.
Check MT1379 and its
N
peripheral circuit.
Check BA5945 (motor
N driver) and its peripheral
circuit
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