Sony MHC-MG110 Manual page 21

E-F Balance Check
Connection:
CD board
TP (TE)
TP (VC)
Procedure:
1. Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the CD board.
2. Turn the power on.
3. Put the disc (PATD-012) in to playback the number two track.
[REPEAT]
4. Press the button. (The tracking servo and the
sledding servo are turned OFF)
5. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse Waveform
0V
[REPEAT]
6. Press the button. (The tracking servo and sledding
servo are turned ON)
Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 5.
Traverse Waveform
0V
Tracking servo
Sled servo
OFF
Checking Location: CD board
oscilloscope
+
–
Center of
the waveform
B
A (DC
voltage)
level: 1.15 ± 0.5 Vp-p
C (DC
voltage)
Tracking servo
Sled servo
ON
HCD-MG110/MG310AV
Checking Location:
– CD BOARD (Conductor Side) –
TP (VC)
IC103
TP
TP (FEI)
(RFAC)
IC101
TP (TE)
TP
(RFDC)
Ver 1.1 2001.05
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