5-52
A
H
White 100%
3-4-2.
VD-031 Board Adjustment
1.
Decoder Free Run Adjustment (NTSC)
(VD-031 Board)
Mode
E-E
Signal
No signal
Measuring Point
TP100 (CL111)
Measuring Instrument
Frequency counter
Adjustment Element
CT101
Specified Value
f = 3579545 ± 50 Hz
Connection: Connect a jumper wire between both ends of L106
(CL124 and CL125).
Switch setting:
NTSC/PAL switch...................................................NTSC
Adjusting method:
1) Set the decoder free run frequency (f) to the specified value
using CT101.
2.
Decoder Free Run Adjustment (PAL)
(VD-031 Board)
Mode
E-E
Signal
No signal
Measuring Point
TP100 (CL111)
Measuring Instrument
Frequency counter
Adjustment Element
CT102
Specified Value
f = 4433619 ± 50 Hz
Connection: Connect a jumper wire between both ends of L106
(CL124 and CL125).
Switch setting:
NTSC/PAL switch...................................................PAL
Adjusting method:
1) Set the decoder free run frequency (f) to the specified value
using CT102.
3.
Y/C Separation Adjustment (VD-031 Board)
(1) Y Signal Level Adjustment (NTSC)
Mode
E-E
Signal
Color bar (NTSC) (VIDEO input)
Measuring Point
Pin
qj
of CN003 (CL126)
Measuring Instrument
Oscilloscope
Adjustment Element
RV701
Specified Value
A = 2.0 ± 0.1 Vp-p
Switch setting:
INPUT SELECT switch.......................................VIDEO
NTSC/PAL switch.................................................NTSC
Adjusting method:
1) Set the Y signal level (A) to the specified value using RV701.
Fig. 5-3-8