Sony Handycam DCR-TRV230E, Service Manual

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5-30
Fig. 5-1-17.
A
2H
1. VCO Adjustment (PD-138/139 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode VTR stop
Signal No signal
Measurement Point Pin
8
of CN5502 (HSY)
Measuring Instrument Frequency counter
Adjustment Page D
Adjustment Address A2, A3
Specified Value f = 15625 ± 30Hz
Note1:
Refer to “LCD Type Check” for the discrimination of the LCD
type.
Adjusting method:
Order Page Address Data Procedure
1 0 01 01 Set the data.
2 D A2 Change the data and set the VCO
frequency (f) to the specified value.
3 D A2 Press PAUSE button.
4 D A2 Read the data, and this data is named
D
A2
.
5 Convert D
A2
to decimal notation,
and obtain D
A2
’. (Note2)
6 Calculate D
A3
’ using following
equations (Decimal calculation)
[2.5 LCD TYPE SO (61k)]
When D
A2
’ 20
D
A3
’= D
A2
’–20
When D
A2
’< 20
D
A3
’ = 0
[2.5 LCD TYPE SO (123k)]
When D
A2
’ 26
D
A3
’=D
A2
’ – 26
When D
A2
’ < 26
D
A3
’=0
[3.0 LCD TYPE SH (123k)]
When D
A2
’ 28
D
A3
’=D
A2
’– 28
When D
A2
’ < 28
D
A3
’=0
[3.5 LCD TYPE SO (123k)]
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)
8 D A3 D
A3
Set the data, and press PAUSE
button.
9 0 01 00 Set the data.
Note2: Refer to “Table 5-4-1. Hexadecimal-decimal Conversion Table”.
2. PSIG Gray Adjustment (PD-139 board)
(DCR-TRV230E/TRV235E/TRV325E/TRV330E/TRV530E)
Set the uniformity improvement signal to an appropriate level.
Mode VTR stop
Signal No signal
Measurement Point Pin
4
of CN5502 (PSIG)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A7
Specified Value A = 5.00 ± 0.1V
Adjusting method:
Order Page Address Data Procedure
1 0 01 01 Set the data.
2 D A7 Change the data and set the PSIG
signal level (A) to the specified value.
(The data should be “00” to “7F”)
3 D A7 Press PAUSE button.
4 0 01 00 Set the data.