Sony ICF-DVD57TV Service Manual page 21

5-7-9. B-Sub CONT (B-ch Sub Contrast) Adjustment
Adjusting Procedure:
1. Connect an oscilloscope of 10 step voltage to the TP1965 and
TP1901 (GND) on the MONITOR board.
2. Adjust the keys so that the E level of the
. / >
waveform on the oscilloscope is 3.25 ± 0.1 Vp-p.
Connection: (5-7-10 to 5-7-12)
INPUT VIDEO jack
(JK501)
NTSC pattern
generator
set
5-7-10. VCO Free Run Adjustment
Condition:
Input the NTSC video signal (10 step (no burst)) (1 Vp-p 75 W) to
the INPUT VIDEO jack (JK501) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
Adjust the keys so that a screen on the monitor may
. / >
become normal.
5-7-11. PLL/V POS Adjustment
Condition:
Input the NTSC video signal (monoscope) (1 Vp-p 75 W) to the
INPUT VIDEO jack (JK501) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
Press the keys to adjust so that the position of screen
. / >
on the monitor becomes vertically symmetric.
5-7-12. H POS Adjustment
Condition:
Input the NTSC video signal (monoscope) (1 Vp-p 75 W) to the
INPUT VIDEO jack (JK501) on the MAIN board from NTSC
pattern generator.
Adjusting Procedure:
Press the keys to adjust so that the position of screen
. / >
on the monitor becomes horizontally symmetric.
ICF-DVD57TV
All manuals and user guides at all-guides.com
E
0V
Adjustment and Connecting Location:
– MONITOR BOARD (Component Side) –
– MONITOR BOARD (Conductor Side) –
TP1412
TP1906
TP1901
(GND)
TP1951
TP1952
21 21
RV1901
5.0V Adjustment
RV1902
DC/DC Converter
Frequency Adjustment
RV1651
PLL Adjustment
RV1501
V COM Adjustment
TP1421
TP1515
TP1909
TP1907
TP1651
TP1510
TP1960
TP1965 TP1963
TP1954
TP1964
ICF-DVD57TV