LG LX-E330A Manual page 10

❏ WAVEFORMS OF MAJOR CHECK POINT
1. HF signal (RF signal ) waveform
(IC801 pin3) during normal play
3. Focus coil drive waveform(IC802 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 (IC802 pin27)
CH2 : TRACKING ERROR (TE: IC801 pin15)
(3) When time division is 0.5nS/div.
(During backward Track Traverse)
(
CH1 : TRACKING COIL DRIVE
SIGNAL 2V/Div. (IC802 pin27)
CH2 : TRACKING ERROR(TE: IC801 pin15)
1V/Div.
2. EFM signal (IC801 pin 3)waveform
0.5V/Div.
(
500nS/Div.
OV
• Focus coil drive waveform(FDO: IC801 pin21) and
1S/Div.
(
1V/Div.
OV
OV
(CH1)
OV
(CH2)
5. Feed motor drive waveform(IC 802 pin14)
1mS/Div.
(
1V/Div.
OV
OV
(CH2)
- 2-6 -
during Normal Play
DRF(IC801 pin67) when focus search is accomplished
( CH1 : FOCUS COIL DRIVE
SIGNAL 2V/Div.
CH2 : DRF
CH1 : TRACKING COIL DRIVE (IC802 pin17)
(
SIGNAL 2V/Div.
CH2 : TRACKING ERROR (TE: IC802 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