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— 17 —
DCR-TRV238E/TRV239E
1. VCO Adjustment (PD-156 board)
Set the VCO free-run frequency. If deviated, the LCD screen
will be blurred.
Set the VCO free-run frequency. If deviated, the LCD screen
will be blurred.
[LCD Type Check]
By measuring the resistor value between Pin 6 of CN5502
and GND, the type of LCD can be discriminated.
By measuring the resistor value between Pin 6 of CN5502
and GND, the type of LCD can be discriminated.
Page
5-29
5-32
Before change
After change
: Added portion.
Resistor value
2.2k
Ω
33k
Ω
LCD type
LCD TYPE SH
LCD TYPE SO
PD board
PD-156
PD-160
When the type of LCD is “LCD TYPE SH”, perform”1-5-1.
LCD SYSTEM ADJUSTMENT (LCD TYPE SH)”.
When the type of LCD is “LCD TYPE SO”, perform “1-5-2.
LCD SYSTEM ADJUSTMENT (LCD TYPE SO)”.
LCD SYSTEM ADJUSTMENT (LCD TYPE SH)”.
When the type of LCD is “LCD TYPE SO”, perform “1-5-2.
LCD SYSTEM ADJUSTMENT (LCD TYPE SO)”.
1-5-1.
LCD SYSTEM ADJUSTMENT (LCD TYPE SH)
(PD-156 board)
(PD-156 board)
1. VCO Adjustment (PD-156 board)
Set the VCO free-run frequency. If deviated, the LCD screen
will be blurred.
Set the VCO free-run frequency. If deviated, the LCD screen
will be blurred.
Added contents
1-5-2.
LCD SYSTEM ADJUSTMENT (LCD TYPE SO)
(PD-160 board)
(PD-160 board)
1. VCO Adjustment (PD-160 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
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 (XHD OUT)
Measuring Instrument
Frequency counter
Adjustment Page
C
Adjustment Address
61, 62
Specified Value
f = 15625 ± 30Hz
Note1: The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
61
Change the data and set the VCO
frequency (f) to the specified value.
frequency (f) to the specified value.
3
C
61
Press PAUSE button.
4
C
61
Read the data, and this data is
named D61.
named D61.
5
Convert D61 to decimal notation,
and obtain D61'. (Note2)
and obtain D61'. (Note2)
6
Calculate D62' using following
equations (Decimal calculation)
When D
equations (Decimal calculation)
When D
61
’ 17
D
62
’ = D
61
’– 17
When D
61
’ < 17
D
62
’ = 00
7
Convert D62’ to a hexadecimal
number, and obtain D62. (Note2)
number, and obtain D62. (Note2)
8
C
62
D62
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”.
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