Waveforms Of Major Check Point - LG FFH-164 Manual

WAVEFORMS OF MAJOR CHECK POINT

1. HF signal (RF signal ) waveform
(IC501 pin 3) during normal play
3. Focus coil drive waveform(IC502 pin13)
• When focus search failed or there is no disc on the tray
4. Tracking coil drive waveform and TE during track
traverse
(1) When time division is 20mS/Div.1V/Div.
(
CH1 : TRACKING COIL DRIVE (IC502 pin27)
CH2 : TRACKING ERROR (TE: IC501 pin15)
(3) When time division is 0.5nS/div.
(During backward Track Traverse)
(
CH1 : TRACKING COIL DRIVE
SIGNAL 2V/Div. (IC502 pin27)
CH2 : TRACKING ERROR(TE: IC501 pin15)
1V/Div.
2. EFM signal (IC501 pin 3)waveform
0.5V/Div.
(
500nS/Div.
OV
• Focus coil drive waveform(FDO: IC501 pin21) and
1S/Div.
(
1V/Div.
OV
(2) When time division 1mS/Div, 1V/Div
OV
(CH1)
OV
(CH2)
5. Feed motor drive waveform(IC 502 pin18)
1mS/Div.
(
1V/Div.
OV
OV
(CH2)
- 2-6 -
during Normal Play
DRF(IC501 pin67) when focus search is accomplished
( CH1 : FOCUS COIL DRIVE
SIGNAL 2V/Div.
CH2 : DRF
(During forward track traverse)
CH2 : TRACKING COIL DRIVE (IC502 pin27)
(
SIGNAL 2V/Div.
CH2 : TRACKING ERROR (TE: IC501 pin15)
1V/Div.
During normal play
0.5V/Div.
(
5µS/Div.
OV
OV
(CH1)
OV
(CH2)
OV
(CH1)
OV
(CH2)
2S/Div.
(
0.5V/Div.
OV