Sony DCR-TRV725E / DCR-TRV730 / DCR-TRV730E / DCR-TRV828 / DCR-TRV828E / DCR-TRV830 / DCR-TRV830E (serv.man2) Service Manual ▷ View online
— 5 —
For LCD Type SH
For LCD Type SO
:
Added portion.
:
Changed portion.
Page
5-30
1-5.
LCD SYSTEM ADJUSTMENT
Note 1:
The back light (fluorescent tube) is driven by a high voltage
AC power supply. Therefore, do not touch the back light holder
to avoid electrical shock.
AC power supply. Therefore, do not touch the back light holder
to avoid electrical shock.
Note 2:
When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
caused by static electricity.
Note 3:
Set the LCD BRIGHT to the center.
Set the LCD COLOR (Menu display) to the center.
Set the LCD COLOR (Menu display) to the center.
Note 4:
PD-138 board: DCR-TRV730
PD-139 board: DCR-TRV725E/TRV730E/TRV828/TRV828E/
PD-139 board: DCR-TRV725E/TRV730E/TRV828/TRV828E/
TRV830/TRV830E
[ LCD Type Check ]
By measuring the resistor value between Pin 6 of CN5502
and GND, the type of LCD can be discriminated.
and GND, the type of LCD can be discriminated.
*1: Except AEP/UK model
*2: AEP/UK model
*2: AEP/UK model
Table 5-1-14.
Resistor
value
LCD type
PD board
DCR-
1.0k
Ω
2.5 LCD
TYPE SH
(61k)
TYPE SH
(61k)
PD-138
TRV730
22k
Ω
2.5 LCD
TYPE SO
(61k)
TYPE SO
(61k)
PD-139
TRV730E(*1)
33k
Ω
2.5 LCD
TYPE SO
(123k)
TYPE SO
(123k)
PD-139
TRV725E
TRV730E(*2)
47k
Ω
3.5 LCD
TYPE SO
(123k)
TYPE SO
(123k)
PD-139
TRV828
TRV828E
TRV830
TRV830E
1-5.
LCD SYSTEM ADJUSTMENT
Note 4:
PD-138 board: DCR-TRV730 (LCD TYPE SH)
PD-139 board: DCR-TRV725E/TRV730E/TRV828/
PD-139 board: DCR-TRV725E/TRV730E/TRV828/
TRV828E/TRV830/TRV830E
DCR-TRV730 (LCD TYPE SO)
DCR-TRV730 (LCD TYPE SO)
[ LCD Type Check ]
By measuring the resistor value between Pin 6 of CN5502
and GND, the type of LCD can be discriminated.
and GND, the type of LCD can be discriminated.
*1: Except AEP/UK model
*2: AEP/UK model
*2: AEP/UK model
Table 5-1-14.
Resistor
value
LCD type
PD board
DCR-
1.0k
Ω
2.5 LCD
TYPE SH
(61k)
TYPE SH
(61k)
PD-138
TRV730
22k
Ω
2.5 LCD
TYPE SO
(61k)
TYPE SO
(61k)
PD-139
TRV730E(*1)
TRV730
33k
Ω
2.5 LCD
TYPE SO
(123k)
TYPE SO
(123k)
PD-139
TRV725E
TRV730E(*2)
47k
Ω
3.5 LCD
TYPE SO
(123k)
TYPE SO
(123k)
PD-139
TRV828
TRV828E
TRV830
TRV830E
— 6 —
Page
5-30
For LCD Type SH
For LCD Type SO
:
Added portion.
0. LCD Initial Data Input (DCR-TRV730)
Mode
VTR stop
Signal
No signal
Adjustment Page
D
Adjustment Address
A0, A1, A4 to A7, AA to AC, AF
Note:
Refer to “LCD type check” for the discrimination of the LCD
type.
type.
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, and input the data in the following table.
Note:
Press the PAUSE button of the adjustment remote
commander each time to set the data.
commander each time to set the data.
3)
Select page: 0, address: 01, and set data: 00.
Data
Address
A0
A1
A4
A5
A6
A7
AA
AB
AC
AF
LCD TYPE SH
77
A7
80
2B
00
B5
3E
00
0F
1F
Remark
Fixed data
Fixed data
V-COM adj.
RGB AMP adj.
Fixed data (*1)
Black limit adj. (*2)
COM AMP adj. (*1)
PSIG gray adj. (*2)
Contrast adj.
Fixed data (*1)
Center level adj. (*2)
Fixed data
Fixed data
LCD TYPE SO
80
A2
26
B3
09
41
1A
4A
0E
5F
*1: LCD TYPE SH
*2: LCD TYPE SO
*2: LCD TYPE SO
— 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.
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
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
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
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
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
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)
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.
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
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
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
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
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
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
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))
TRV830E /TRV730 (LCD TYPE SO))
— 8 —
For LCD Type SH
For LCD Type SO
3. RGB AMP Adjustment (PD-138 board)
(DCR-TRV730)
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).
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
4. RGB AMP Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
TRV830E)
TRV830E)
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).
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PSIG)
External trigger: Pin 4 of CN5502
(PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
A5
Specified Value
2.5 LCD TYPE SO (61k)
A = 7.58 ± 0.05V
2.5 LCD TYPE SO (123k)
A = 7.46 ± 0.05V
3.5 LCD TYPE SO (NTSC)
A = 7.52 ± 0.05V
3.5 LCD TYPE SO (PAL)
A = 3.76 ± 0.05V
Note:
Refer to “LCD Type Check” for the discrimination of the LCD type.
5. Black Limit Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/ TRV830/
TRV830E)
TRV830E)
Set the dynamic range of the LCD driver to an appropriate level.
If deviated, the LCD screen will become blackish or saturated
(whitish).
If deviated, the LCD screen will become blackish or saturated
(whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 4 of CN5502 (PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
A6
Specified Value
A = 8.10 ± 0.08V
Note:
NTSC model: DCR-TRV828/TRV830
PAL model: DCR-TRV725E/TRV730E/TRV828E/TRV830E
PAL model: DCR-TRV725E/TRV730E/TRV828E/TRV830E
6. Contrast Adjustment (PD-138 board)
(DCR-TRV730)
Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
value. If deviated, the screen image will be blackish or saturated
(whitish).
Page
5-32
5-33
:
Added portion.
:
Changed portion.
3. RGB AMP Adjustment (PD-138 board)
(DCR-TRV730 (LCD TYPE SH) )
4. RGB AMP Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
TRV830E /TRV730 (LCD TYPE SO) )
TRV830E /TRV730 (LCD TYPE SO) )
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PSIG)
External trigger: Pin 4 of CN5502
(PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
A5
Specified Value
2.5 LCD TYPE SO (61k)
A = 7.58 ± 0.05V
2.5 LCD TYPE SO (123k)
A = 7.46 ± 0.05V
3.5 LCD TYPE SO (NTSC)
A = 7.52 ± 0.05V
3.5 LCD TYPE SO (PAL)
A = 7.58 ± 0.05V
Note:
Refer to “LCD Type Check” for the discrimination of the LCD type.
5. Black Limit Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/ TRV830/
TRV830E /TRV730 (LCD TYPE SO) )
TRV830E /TRV730 (LCD TYPE SO) )
Note:
NTSC model: DCR-TRV828/TRV830 /TRV730
PAL model: DCR-TRV725E/TRV730E/TRV828E/TRV830E
PAL model: DCR-TRV725E/TRV730E/TRV828E/TRV830E
6. Contrast Adjustment (PD-138 board)
(DCR-TRV730 (LCD TYPE SH) )
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