Sony MZ-R55, Service Manual

Page: 63 / 129

– 19 –
CD RF LEVEL CHECK
Connection :
Adjustment Method :
1.
Set the ser vo mode of the test mode (Mode : 000).
2. Press the
(
ke y, and set the CD test adjustment mode
(Mode : 050) using the VOLUME + or – ke y.
3. Press the
=
or
+
ke y and mo ve the optical pic k-up to
the center circumference.
4. Inser t a test CD (TD YS-1).
5. When the
(
ke y is pressed, the CD FE balance adjustment
mode (Mode : 052) will be set after CD focus search adjust-
ment mode (Mode : 051).
6. When the
(
ke y is pressed, the CD ABCD le vel adjustment
mode (Mode : 053) is set.
7. Press the
P
ke y to perf orm automatic adjustment, and c hec k
that the RF le vel is 1.1
±
0.3 Vp-p.
digital voltmeter
MAIN board
AP5117 (VCC)
AP574 (LDI0)
oscilloscope
MAIN board
AP5500 (RF)
AP5430 (VC)
8. Chec k that the v olta ge between AP5117 (VCC) and AP574
(LDI0) and at this time is belo
w 40 mV .
9. Press the
p
ke y.
10. Exit the test mode.
1.0
±
0.3 Vp-p
(RF waveform)
AP574
(LDI0)
AP5117
(VCC)
AP5430
(VC)
AP5500
(RF)
BP801
(TEST)
IC501
CN501
IC503
IC509
TP5980
(TE)
– main board (side B) –
– main board (side B) –
Adjustment Location :