Sony Handycam RMT-708 Service, Руководство по обслуживанию, Страница: 115 / 240

5-29
2. VCO Adjustment (PD-93 board)
Set the VCO freerun frequency. If deviated, the LCD screen will be
blurred.
Mode VTR stop
Signal No signal
Measurement point Pin
2
of CN4501 (VCO VOLTAGE)
of PD-93 board
Measuring instrument Oscilloscope (DC range)
Adjustment page E
Adjustment address D6 (NTSC)
D6, BF (PAL)
Specified value A = 2.75
±
0.02Vdc
Note1: NTSC model: CCD-TRV95/TRV95PK/TRV99
PAL model: CCD-TRV89E/TRV95E/TRV99E
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.
7) Only for PAL model, select page: E, address: D6, and read the
data (D
D6
).
8) Onl y for PAL model, calculate the adjustment data
(hexadecimal) from the following equations (hexadecimal
calculation), and input to address: BF. (Refer to Table 5-1-2.
Hexadecimal-Decimal conversion Table.)
D
BF
= D
D6
Note2: After setting data, be sure to press the PAUSE button.
9) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
10) Select page: 0, address: 01, and set data: 00.
Fig. 5-1-21.
H
A
GND level
(0 Vdc)
3. D range Adjustment (PD-93 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).
Note1 :
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: 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.
Mode VTR stop
Signal No signal
Measurement point Pin
3
of CN4501 (VG) of PD-93
board
External trigger : Pin
4
of CN4501
(PANEL COM)
Measuring instrument Oscilloscope
Adjustment page E
Adjustment address D4
Specified value A = 3.62
±
0.05V
Fig. 5-1-22.
A
2H