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DCR-TRV725E, DCR-TRV730, DCR-TRV730E, DCR-TRV828, DCR-TRV828E, DCR-TRV830, DCR-TRV830E (serv.man2) - Sony Movie Service Manual (repair manual). Page 7

Read Sony DCR-TRV725E / DCR-TRV730 / DCR-TRV730E / DCR-TRV828 / DCR-TRV828E / DCR-TRV830 / DCR-TRV830E (serv.man2) Service Manual online

— 7 —
Page
5-31
For LCD Type SH
For LCD Type SO
 : 
Added portion.
1. VCO Adjustment (PD-138/139 board)
Set the VCO free-run frequency. If deviated, the LCD screen
will be blurred.
Adjusting method:
Order Page Address Data
Procedure
6
Calculate D
A3
’ using following
equations (Decimal calculation)
[2.5 LCD TYPE SH (61k) NTSC]
When D
A2
’   232
D
A3
’= D
A2
’+23
When D
A2
’> 232
D
A3
’= 255
[3.5 LCD TYPE SO (123k) NTSC]
When D
A2
’   246
D
A3
’= D
A2
’+9
When D
A2
’> 246
D
A3
’= 255
[2.5 LCD TYPE SO (61k) PAL]
When D
A2
’   20
D
A3
’= D
A2
’–20
When D
A2
’< 20
D
A3
’= 0
[2.5 LCD TYPE SO (123k) PAL]
When D
A2
’   26
D
A3
’= D
A2
’–26
When D
A2
’< 26
D
A3
’= 0
[3.5 LCD TYPE SO (123k) PAL]
When D
A2
’   9
D
A3
’= D
A2
’–9
When D
A2
’< 9
D
A3
’= 0
7
Convert D
A3
’ to a hexadecimal
number, and obtain D
A3
. (Note2)
2. PSIG Gray Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
 TRV830E)
Set the uniformity improvement signal to an appropriate level.
1. VCO Adjustment (PD-138/139 board)
Set the VCO free-run frequency. If deviated, the LCD screen
will be blurred.
Adjusting method:
Order Page Address Data
Procedure
6
Calculate D
A3
’ using following
equations (Decimal calculation)
[2.5 LCD TYPE SH (61k) NTSC]
When D
A2
’   232
D
A3
’= D
A2
’+23
When D
A2
’> 232
D
A3
’= 255
[2.5 LCD TYPE SO (61k) NTSC]
When D
A2
’   235
D
A3
’= D
A2
’+20
When D
A2
’> 235
D
A3
’= 255
[3.5 LCD TYPE SO (123k) NTSC]
When D
A2
’   246
D
A3
’= D
A2
’+9
When D
A2
’> 246
D
A3
’= 255
[2.5 LCD TYPE SO (61k) PAL]
When D
A2
’   20
D
A3
’= D
A2
’–20
When D
A2
’< 20
D
A3
’= 0
[2.5 LCD TYPE SO (123k) PAL]
When D
A2
’   26
D
A3
’= D
A2
’–26
When D
A2
’< 26
D
A3
’= 0
[3.5 LCD TYPE SO (123k) PAL]
When D
A2
’   9
D
A3
’= D
A2
’–9
When D
A2
’< 9
D
A3
’= 0
7
Convert D
A3
’ to a hexadecimal
number, and obtain D
A3
. (Note2)
2. PSIG Gray Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
 TRV830E /TRV730 (LCD TYPE SO))
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