Sony Handycam DCR-PC10, Service Manual

Page: 119 / 181

5-47
3-5. VIDEO SYSTEM ADJUSTMENTS
3-5-1. RF Block Adjustment (MR-39 Board)
1. Record Current Adjustment/
Frequency Response Check
Mode VTR stop
Measurement Point For ODD channel adjustment :
CH-1 : CN2708 pin
5
(CL2719)
CH-2 : CN2708 pin
6
(CL2718)
For EVEN channel adjustment :
CH-1 : CN2708 pin
3
(CL2721)
CH-2 : CN2708 pin
2
(CL2722)
Measuring Instrument Oscilloscope
ADD mode
CH-2 INV mode
Adjustment Page C
Adjustment Address 3E, 3F
Specification Value A = 3.1 ± 0.1Vp-p
Connection :
Remove CN2708 and perform the following connection.
1)
For ODD channel adjustment, connect a resistor of 180
Ω
between CN2708 pin
5
(CL2719) and CN2708 pin
6
(CL2718).
2) For EVEN channel adjustment, connect a resistor of 180
Ω
between CN2708 pin
3
(CL2721) and CN2708 pin
2
(CL2722).
180
Ω
resistor (1-249-408-11)
Adjustment procedure:
Processing after Adjustments:
Order Page Address Data Procedure
1 Calibrate the VERT gain of CH-1 and CH-2 of an oscilloscope for unity gain.
Set the scope to ADD mode. Set CH-2 to INV mode.
2 0 01 01 Set the data. (Preparation)
3 3 01 0C After setting the data, press the PAUSE button.
4 3 34 01 After setting the data, press the PAUSE button.
5 C 3F Change the following data until the signal voltage (A) satisfies the specification value
3E and press the PAUSE button.
For ODD channel : Page C, Address : 3F
For EVEN channel : Page C, Address : 3E .
Order Page Address Data Procedure
1 3 34 04 After setting the data, press the PAUSE button.
2 3 01 00 After setting the data, press the PAUSE button.
3 0 01 00 Set the data. (End)
Fig. 5-3-7
0.1
µ
sec
A