Sony MZ-R37 Service Manual page 18

LOW REFLECTION CD TRAVERSE ADJUSTMENT
Connection :
MAIN board
SP526 (TE)
AP503 (VC)
Adjustment Method :
1. Set the servo mode of the test mode (Mode : 000).
2. Press the ( key, and set the low reflection CD test adjustment
mode (Mode : 040) using the VOLUME + or – key.
3. Insert any MO disk available on the market.
4. When the ( key is pressed, the low reflection CD EF balance
adjustment mode (Mode : 042) will be set after low reflection
CD focus search adjustment mode (Mode : 041).
5. Press the P key to perform automatic adjustment, and check
that the traverse waveform is symmetrical at the top and bottom.
(Traverse waveform)
0 V
Specification : A = B, C
6. Check that the traverse level at this time is above 0.9 Vp-p.
7. Press the p key.
8. Exit the test mode.
Adjustment Location : See page 19.
oscilloscope
A
B
> =
0.9 Vp-p
CD TRAVERSE ADJUSTMENT
Connection :
MAIN board
SP526 (TE)
AP503 (VC)
Adjustment Method :
1. Set the servo mode of the test mode (Mode : 000).
2. Press the ( key, and set the CD test adjustment mode (Mode
: 050) using the VOLUME + or – key.
3. Press the = or + key and move the optical pick-up to the
center circumference.
4. Insert a test CD (TDYS-1).
5. When the ( key is pressed, the CD EF balance adjustment
mode (Mode : 052) will be set after CD focus search adjustment
mode (Mode : 051).
6. Press the P key to perform automatic adjustment, and check
that the traverse waveform is symmetrical at the top and bottom.
(Traverse waveform)
C
0 V
7. Check that the traverse level at this time is above 1.0 Vp-p.
8. Press the p key.
9. Exit the test mode.
Adjustment Location : See page 19.
– 18 –
oscilloscope
> =
Specification : A = B, C 1.0 Vp-p
A
C
B