Toshiba SD-1200 Service Manual page 58

N
Do signals output to
pins 4 to 9 of CN501?
Y
Check IC501.
Fig. 1-3-11
4
Disc motor (D.M.) does not rotate.
Does pin 117 of IC401
(TP409) PLCK oscillate around
10 MHz ?
Y
Check peripheral circuits
of IC402.
Check disc motor and wiring.
5
Focus servo is NG.
Are FE, SBAD,
FSON signals normal?
Y
Check peripheral circuit of IC601.
N
Check wiring for
pickup head.
Lens cleaning.
Replace pickup
mechanism.
N
Check peripheral
circuit of IC402.
Fig. 1-3-10
Focus servo ON
signal waveform
Focus search Focus servo on
Fig. 1-3-12
FE signal
Pin 150 (TP405)
of IC401
0.3V
1.65V
0.3V
SBAD signal
Pin 152 (TP503)
of IC401