Vco Adjustment - Sony CCD-TRV32 Service Manual

20-2.

VCO adjustment

Purpose : Sets the VCO free-run frequency.
Adjustment Error : Incorrect picture on EVF
Mode Stop
Signal No signal
CN804 pin 4 (HDB) (Type 1, 4)
Measurement point
CN1804 pin 4 (HSY) (Type 2, 3)
Measuring equipment Frequency counter
Adjustment page F
Adjustment address DE
f=15625 ± 30Hz (PAL) (Type 1, 2, 4)
Specification
f=15734 ± 30Hz (NTSC) (Type 3, 4)
Adjustment procedure:
Order Page Address
1
2
3 6 00
4 F DE
5
6 6 00
7
Note :
TYPE 1, 4 (PD-76/SD-24 board)
C183
37
+
38
39
1µF
16V
R821
R819
560
Data
Remove C183/C1804 (1µF capacitor) (Note)
Press the DATA SCREEN button of the remote commander to disappear the display.
01 After setting the data, press the PAUSE button. (Preparation)
Change data using the PLAY and STOP buttons until the oscillating frequency satisfies
the specification.
Press the PAUSE button.
00 After setting the data, press the PAUSE button. (End)
Connect C183/C1804 (1µF capacitor) (Note)
SYNC SEP
IC801
 
R821 : SD-24 board
 
R819 : PD-76 board
Type 1
2.5 inch (PAL only)
Type 2
Type 3
3.0 inch (NTSC)
Type 4
3.5 inch (NTSC/PAL)
No mark : Type 1, Type 4
〈 〉 : Type 2, Type 3
Procedure
TYPE 2, 3 (PD-77/SD-25 board)
R1815
560
C1804
Fig. 6-1-17
6-34
LCD size LCD board
PD-74/SD-24
PD-75/SD-25
PD-77
PD-76
36 35
37
1µF
〈IC1801〉