Sony MZ-R55 Service Manual page 63

CD RF LEVEL CHECK
Connection :
MAIN board
AP5500 (RF)
AP5430 (VC)
MAIN board
AP5117 (VCC)
AP574 (LDI0)
Adjustment Method :
1. Set the ser vo mode of the test mode (Mode :
( ke y, and set the CD test adjustment mode
2. Press the
(Mode : 050) using the VOLUME + or – ke y.
= or + ke y and mo ve the optical pic
3. Press the
the center circumference.
4. Inser t a test CD (TD YS-1).
5. When the ( ke y is pressed,
mode (Mode : 052) will be set after CD focus search adjust-
ment mode (Mode : 051).
6. When the ( ke y is pressed,
mode (Mode : 053) is set.
P ke y to perf orm automatic adjustment,
7. Press the
that the RF le vel is 1.1 ± 0.3 Vp-p.
(RF waveform)
8. Chec k that the v olta ge between AP5117 (VCC) and AP574
(LDI0) and at this time is belo
9. Press the p ke y.
10. Exit the test mode.
oscilloscope
digital voltmeter
000).
k-up to
the CD FE balance adjustment
the CD ABCD le vel adjustment
and c hec k
1.0 ± 0.3 Vp-p
w 40 mV .
Adjustment Location :
– main board (side B) –
IC509
BP801
(TEST)
– main board (side B) –
– 19 –
AP574
(LDI0)
IC503
IC501
AP5500
AP5117
(RF) AP5430
(VCC)
(VC)
TP5980
(TE)