Adjustment (Pd-97 Board); Vco Adjustment (Pd-97 Board) - Sony DCR-PC10 Service Manual

1-4-2. 15.5 V Adjustment (PD-97 Board)
Purpose: Adjust the power voltage driven LCD correctly.
Subject Anything
IC6001 pin 2 (CL6004)
Measurement Point
Measuring Equipment Digital voltmeter
Adjusting Element RV6000
Specification Value 15.50 ± 0.05 V
Note 1: PD-97 board CN5601
a) Confirm 8.4 ± 0.1V between Pins 3 (PANEL UNREG)
and 1 (PANEL UNREG GND).
b) Confirm 4.90 ± 0.05V between Pins 4 (LCD 4.9V)
and 1 (PANEL UNREG GND).
Note 2: LCD panel turns on.
Adjustment Procedure:
Order
1 Adjust RV6000 until the DC voltage satisfies the
specification.
1-4-3.

VCO Adjustment (PD-97 Board)

Purpose:
To make the TG frequency constant
(amplitude).
Adjustment error: VF picture will lose sync when error is large.
Mode VTR stop
Signal No signal
CN3701 pin @£ (CL-VCO) on
Measurement Point
DD-103 board (Note)
Measuring Equipment Oscilloscope (DC range)
Adjustment Page D
Adjustment Address C5
Specification Value A=2.43 ± 0.05V
Note : Pull-up CL-VCO terminal +15V with 10k
shown in preparation Fig. 5-1-19 (See page 5-27).
Adjustment procedure:
Order Page Address
1 0 01
2
3 D C5
4
5 0 01
Procedure
resistor as
Data
01 Set the data. (Preparation)
Check the GND level on an oscilloscope in DC mode.
Change the data until the VCO voltage (A) becomes the specification value.
Press the PAUSE button.
00 Set the data. (End)
Procedure
5-28
VCO
A
GND level
(0Vdc)
Fig. 5-1-20