CD-BK110V/CD-BP99V
Stopped
(1) Focus-HF system check.CH1=500 mVCH3=500 mV500 ms/div
DC 10:1DC 10:1(500 ms/div)
TNORM:20 kS/s
Although a CD is inserted and the cover is closed, "NO
DISC" is displayed.FDO
1
Press the OPEN/CLOSE switch (SW1) without inserting a
disc, and try starting the playback operation.
TDO
3
CH1
v/DIV
500 mV
=Filter==Offset==Record Length==Trigger=
Smoothing : ONCH1 : 0.000 VMain : 100 KMode : AUTO
BW : FULLCH2 : 0.0 VZoom : 2 KType : EDGE CH1
CH3 : 0.000 VDelay : 0.0 ns
CH4 : 0.00 VHold off : 0.2 ?s
Figure 46-1
No
1. Does the pickup move to the PICKUP-IN Switch (SW4)Sled motor (M2).
position ?
Yes
2. Does the focus (lens) move up and down ?No
Check the focus peripheral circuit.
(Waveform drawing Figure 46-1).
Yes
No
3. Is the laser lit ?Check the laser diode driver Q3 peripheral circuit.
Yes
No
4. Is the turntable rotating ?Spindle motor (M1).
When a disc is loaded, start playback operation.
No
1. Is focus servo activated ? (Waveform drawing Figure 46-2)Pins 1~11 on IC1
Check the laser diode driver Q3 peripheral circuit.
YesFocus error circuit (pins 20 and 21 on IC1).
No
No
2. Does DRF change from "L" to "H" ?Is the disc rotating ?Check the spin system.
If the disc is spinning and a HF waveform is generated,Yes
DRF will go H.
No
3. Is the HF waveform normal ?If the level is not normal, check around pins 27~29 on IC1.
(Waveform drawing Figure 46-3)
Stopped
CH1=500 mVCH2=10 VCH3=1 V500 ms/div
DC 10:1DC 10:1DC 10:1(500 ms/div)
NORM:20 kS/s
FDO
1
TDRF
2
TE
3
CH2
Position
CH Position To 0.20 div
-3 div-1 div0 div+1 div+3 div
=Filter==Offset==Record Length==Trigger=
Smoothing : ONCH1 : 0.000 VMain : 100 KMode : AUTOVp-p=1.0 V~1.3 V
BW : FULLCH2 : 0.0 VZoom : 2 KType : EDGE CH10.5 mV/div,0.5 ?sec/div
CH3 : 0.00 VDelay : 0.0 ns
CH4 : 0.00 VHold off : 0.2 ?s
Figure 46-2Figure 46-3
� 46 � |
ACEC
SHARP
