Lcd System Adjustment; Vco Adjustment (Pd-161 Board) - Sony DCR-TRV16 Service Manual

1-5.

LCD SYSTEM ADJUSTMENT

Note1: 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.
Note2: When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
Note3: Before performing the adjustments, check the data of page: 0,
address: 10 is "00". If not, set data: 00 to this address.
Note4: NTSC model: DCR-TRV16/TRV18
PAL model: DCR-TRV16E/TRV18E/TRV116E/TRV118E
Switch setting:
LCD BRIGHT(Menu setting) ............................................. Center.
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN1002 of the VC-280 board. Connect the
measuring instruments via the multi CPC-8 jig (J-6082-388-A). The
following table shows the Pin No. and signal name of CN1002.
Pin No. Signal Name
1 N.C.
3 N.C.
5 EVF VCO
7 PANEL VG
9 H START
11 PANEL COM
13 N.C.
15 N.C.
17 SWP
19 GND
Table 5-1-13.
CN1002
1 2
20
19
fig. 5-1-18.
DCR-TRV16/TRV16E/TRV18/TRV18E/TRV116E/TRV118E
Pin No. Signal Name
2 N.C.
4 EVF VG
6 GND
8 PD VCO
10 XHD/PSIG
12 TMS (MAKER CHECK)
14 N.C.
16 GND
18 RF IN/LANC JACK IN
20 RF MON
Removed the
CPC lid.

1. VCO Adjustment (PD-161 board)

Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 C 61
3 C 61
4 C 61
5
6
7
8 C 62
9 0 01
Note2: Refer to "Table 5-4-1. Hexadecimal-decimal Conversion Table".
5-33
VTR stop
No signal
Pin 9 of CN1002 of VC-280 board
(H START)
Frequency counter
C
61, 62
f = 15734 ± 30Hz (NTSC)
f = 15625 ± 30Hz (PAL)
Procedure
01 Set the data.
Change the data and set the VCO
frequency (f) to the specified
value.
Press PAUSE button.
Read the data, and this data is
named D .
61
Convert D to decimal notation,
61
and obtain D '. (Note2)
61
Calculate D ' using following
62
equations (Decimal calculation)
[NTSC model]
When D ' 229
61
D ' = D ' + 26
62 61
When D ' > 229
61
D ' = 255
62
[PAL model]
When D ' 26
61
D ' = D ' – 26
62 61
When D ' < 26
61
D ' = 0
62
Convert D ' to a hexadecimal
62
number, and obtain D . (Note2)
62
D Set the data, and press PAUSE
62
button.
00 Set the data.