Rp Filter F0 Adjustment (Vc-195 Board) - Sony Handycam Vision CCD-TRV89E Service Manual

6. RP Filter f0 Adjustment (VC-195 board)

Adjust the LPF of the playback RF amplifier.
Mode VTR stop
Signal No signal
Pin 9 of CN910 (RF AGC OUT)
Measurement Point
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 4E
Specified Value A = Below 10mVp-p
Connection:
1) Input a 14.2MHz, 400mVp-p CW signal to Pin 7 of CN910
(RF AGC IN).
14.2MHz 400mVp-p
Signal
generator
0.01 µ F
47 Ω
Transistor : General NPN transistor (2SC403. etc)
47 Ω resistor :
1-249-401-11
1k Ω resistor :
1-249-417-11
15k Ω resistor :
1-249-431-11
0.01 µ F capacitor :
1-101-004-00
Fig. 5-3-11.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 35, and press the PAUSE
button of the adjusting remote commander.
3) Select page: F, address: 4E, change the data and minimize the
14.2 MHz signal level (A).
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-12.
Pin 5 of CN101 of
PJ-85 board
1k Ω
0.01 µ F
Pin 7 of CN910
(RF AGC IN)
Pin 8 of CN910
(REG GND)
15k Ω
5-49