Vco Adjustment (Pd-105 Board); D Range Adjustment (Pd-105 Board) - Sony CCD-TRV63 Service Manual

2. VCO Adjustment (PD-105 board)

Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode VTR stop
Signal No signal
Pin 2 of CN5501 (VCO VOLTAGE)
Measurement Point
Measuring Instrument Oscilloscope (DC range)
Adjustment Page E
Adjustment Address D8
Specified Value A = 1.70
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, set data: 55, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 7D, and set data: 00.
4) Select page: E, address: D8, change the data and set the VCO
VOLTAGE (A) to the specified value.
5) Press the PAUSE button.
6) Select page: 2, address: 01, set data: 00, and press the PAUSE
button.
7) Select page: 0, address: 01, and set data: 00.
H
A
Fig. 5-1-17.
+0.03
V
–0.05
GND level
(0Vdc)

3. D range Adjustment (PD-105 board)

Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note : Press the DISPLAY button and erase the screen indictors on the
LCD screen.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, set data: 55, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 7D, and set data: 00.
4) Select page: E, address: D6, change the data and set the voltage
(A) between the reversed waveform pedestal and non-reversed
waveform pedestal to the specified value.
5) Press the PAUSE button.
6) Select page: 2, address: 01, set data: 00, and press the PAUSE
button.
7) Select page: 0, address: 01, and set data: 00.
A
Pedestal
5-25
VTR stop
No signal
Pin 3 of CN5501 (VG)
External trigger : Pin 4 of CN5501
(PANEL COM)
Oscilloscope
E
D6
A = 3.06 ± 0.05V
Pedestal
2H
Fig. 5-1-18.