JVC TH-G40C Service Manual page 26

5.6.2 SDRAM CLOCK
1) ES8391 main clock is at 27MHz(X501)
DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V
5.6.3 TRAY OPEN/CLOSE SIGNAL
1) Tray open/close waveform
OPENSW
CLOSESW
CLOSE
3) Tray open waveform
1-26 (No.MB672<Rev.002>)
1
1
2
OPEN
3
4
OPENSW
CLOSESW
OPEN
CLOSE
2) Tray close waveform
OPENSW
CLOSESW
1
2
3
4
4
3
1
OPEN
CLOSE
1
2
3
4
1
2