Zenith DVB318, Руководство по обслуживанию

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3-8
TE and TACT signals are output respectively from pin 54 and pin 34 of IC 202 during a normal play.
SLED signal is output pin 29 of IC 202 and flow into pin 15 and pin 18 of IC 201 to operate a sled motor
when to skip chapters or to scan.
IC202
pin34
IC202
pin54
IC202
pin29
IC202
pin34
IC202
pin54
IC202
pin29
The waveform during a normal play The waveform when to skip or scan
14. Checking the track jump
This is the waveform of FE and collector
outputs of Q205 and Q206 when to play DVD
This is the waveform of FE and collector outputs
of Q205 and Q206 when to play CD
The waveforms as below indicate “COLLECTOR” outputs of Q205 and Q206,
respectively when to play DVD and CD
IC202
pin55
(TP212)
Q206
COLLECTOR
Q205
COLLECTOR
IC202
pin115
Q206
COLLECTOR
Q205
COLLECTOR
15. The status of CD_LD and DVD_LD in the PLAY MODE
DVD LD ON
DVD LD OFF
CD LD ON