9
HCD-RV2/RV5/RV6
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use LUV-P01 (Part No. 4-999-032-01) unless otherwise indi-
cated.
3. Use an oscilloscope with more than 10MW impedance.
4. Clean the object lens by an applicator with neutral detergent when
the signal level is low than specified value with the following
checks.
S-CURVE CHECK
Procedure :
1. Connect an oscilloscope to TP68 (FE) and TP73 (DVD) on the
BD board.
2. Turn the power ON.
3. Load a disc (LUV-P01) and actuate the focus search. (In conse-
quence of open and close the disc tray, actuate the focus search)
4. Confirm that the oscilloscope waveform (S-curve) is symmetri-
cal between A and B. And confirm peak to peak level within 2 ±
0.5 Vp-p.
Note: •Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
•Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF LEVEL CHECK
Procedure :
1. Connect an oscilloscope CH1 to TP71 (RFDC), CH2 to TP72
(RFAC) and TP73 (DVD) on the BD board.
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
Note: Clear RF signal waveform means that the shape “ ◊ ” can be
clearly distinguished at the center of the waveform.
TRAVERSE LEVEL CHECK
Procedure :
1. Connect an oscilloscope to TP70 (TE) and TP73 (DVD) on the
BD board.
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the hH button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
Connecting Location:
+
–
oscilloscope
BD board
TP68 (FE)
TP73 (DVD)
symmetry
S-curve waveform
within 2
±
0.5Vp-
A
B
+
–
oscilloscope
TP71 (RFDC)
TP72 (RFAC)
BD board
TP73 (DVD)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 0.75
±
0.1Vp-p (RFDC)
1.05
±
0.3Vp-p (RFAC)
TP70 (TE)
TP73 (DVD)
BD board
+
–
oscilloscope
level=1.2
±
0.55Vp-p
symmetry
A (DC voltage
center of
waveform
B
DVC
1 track jump waveform
– BD BOARD (Conductor Side) –
TP70
(TE)
TP68
(FE)
TP71
(RFDC)
TP73
(DVD)
TP72
(RFAC)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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