Lcd System Adjustment; Vco Adjustment (Pd-165 Board) - Sony DCR-TRV40 Service Manual

DCR-TRV40/TRV40E/TRV50/TRV50E
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-TRV40/TRV50
PAL model: DCR-TRV40E/TRV50E
Switch setting:
LCD BRIGHT(Menu setting) ............................................. Center.
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN1012 of the VC-283 board. Connect the
measuring instruments via the multi CPC-7 jig (J-6082-382-A). The
following table shows the Pin No. and signal name of CN1012.
Pin No. Signal Name
1 N. C.
2 RF MON
3 RF IN/LANC JACK IN
4 SWP
5 PANEL COM
6 GND
7 H START
8 GND
Table. 5-1-10.
CN1012
16
1
Remove the CPC lid.
Pin No. Signal Name
9 PANEL VG
10 GND
11 EVF VCO
12 GND
13 EVF VG
14 EXT DA
15 LANC SIG
16 N. C.
Fig. 5-1-19.

1. VCO Adjustment (PD-165 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
Note: 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 C 62
6 0 01
5-40
VTR stop
No signal
Pin 7 of CN1012 of VC-283 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
D Set the data, and press PAUSE
61
button.
00 Set the data.