Vco Adjustment (Pd-92 Board); D Range Adjustment (Pd-92 Board) - Sony Handycam Vision CCD-TRV300E Service Manual

2. VCO Adjustment (PD-92 board)

Set the VCO freerun frequency. If deviated, the LCD screen will be
blurred.
Mode VTR stop
Signal No signal
Pin 2 of CN5501 (VCO VOLTAGE)
Measurement point
of PD-92 board
Measuring instrument Oscilloscope (DC range)
Adjustment page E
Adjustment address D6, BF
A = 2.75 ± 0.02Vdc
Specified value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 55, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 7D, and set data: 00.
4) Select page: E, address: D6, change the data and set the VCO
VOLTAGE (A) to the specified value.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: E, address: BF, and set the same data as page: E,
address: D6, and press the PAUSE button of the adjusting remote
commander.
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
8) Select page: 0, address: 01, and set data: 00.
H
A
Fig. 5-1-21.

3. D range Adjustment (PD-92 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
Note1 : Press the DISPLAY button and erase the screen indictors
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 55, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 7D, and set data: 00.
4) Select page: E, address: D4, 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 of the adjusting remote commander.
6) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
7) Select page: 0, address: 01, and set data: 00.
GND level
(0 Vdc)
5-27
VTR stop
No signal
Pin 3 of CN5501 (VG) of PD-92
board
External trigger : Pin 4 of CN5501
(PANEL COM)
Oscilloscope
E
D4
A = 3.62 ± 0.05V
on the LCD screen.
2H
Fig. 5-1-22.
A