Sony CCD TRV16 Service Manual - Page 111

VCO Adjustment PD-107 board, D range Adjustment PD-107 board, Note1

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2. VCO Adjustment (PD-107 board) Set the VCO freerun frequency. If deviated, the LCD screen will be blurred. Mode VTR stop Signal Measurement point No signal Pin 2 of CN5501 (VCO VOLTAGE) of PD-107 board Measuring instrument Oscilloscope Adjustment page E Adjustment address D6 Specified value A = 2.75 ± 0.02V 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: 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. H A Fig. 5-1-22. GND level (0 Vdc) 3. D range Adjustment (PD-107 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 VTR stop No signal Pin 3 of CN5501 (VG) of PD-107 board External trigger : Pin 4 of CN5501 (PANEL COM) Oscilloscope E D4 A = 3.62 ± 0.05V 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. A 2H Fig. 5-1-23.

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2. VCO Adjustment (PD-107 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 CN5501 (VCO VOLTAGE)
of
PD-107 board
Measuring instrument
Oscilloscope
Adjustment page
E
Adjustment address
D6
Specified value
A = 2.75 ± 0.02V
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: 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.
Fig. 5-1-22.
3. D range Adjustment (PD-107 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 CN5501 (VG) of PD-107
board
External trigger : Pin
4
of CN5501
(PANEL COM)
Measuring instrument
Oscilloscope
Adjustment page
E
Adjustment address
D4
Specified value
A = 3.62 ± 0.05V
Fig. 5-1-23.
H
A
GND level
(0 Vdc)
A
2H