Sony HCD-CP2 Service Manual page 13

4. ALL SERVO ON Mode
1. Press the button to enter the ALL SERVO ON mode and
u
display as below. (All servo ON)
Display
P L
* * * *
2. Connect an oscilloscope to TP (RF) and TP (VC) on the CD
board.
Connection:
oscilloscope
(DC range)
BD board
TP (RF)
TP (VC)
3. Confirm the RF level of waveform satisfy specified value as
follows.
RF signal waveform
Specified value:
RF level: 1 0.3 Vp-p
5. LPC OFF Mode
1. Press the button to enter the LPC OFF mode and display
x
as below. (LPC OFF)
Display
P L
* * * *
2. Confirm the RF level of waveform is the same as the RF level
in "4. ALL SERVO ON mode".
If the RF level is down from the RF level in "4. ALL SERVO
ON mode", measure again after clean the object lens by an
applicator with lens cleaning liquid.
6. Releasing the CD Test Mode
1. Press the x (CD) button to stop rotate the disc.
2. Press the button to release the CD test mode and turn the
?/1
power OFF.
STEREO
+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2 0.1 Vp-p
Connecting Location:
– CD BOARD (Conductor Side) –
TP (GND)
TP (VC)
TP (TE)
TP (RF)
IC701
IC703
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