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5. C OUT Level Adjustment (VC-214 board)
Set the chroma signal output level. (Adjust the D/A converter out
put level of IC151.)
Mode
VTR stop
Signal
No signal
Measurement Point
Chroma signal terminal of S VIDEO
terminal (75Ω terminated )
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
6B
Specified Value
A=286 ± 5mV
Note : Insert the plug into the S video terminal.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, set data: 41, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 61, and set data: 30.
4) Select page: F, address: 6B, change the data and set the burst
level (A) to the specified value.
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 6, address: 61, and set data: 10.
7) Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
8) Select page: 0, address: 01, and set data: 00.
H
Fig. 5-3-9.
6. RP Filter f
Adjustment (VC-214 board)
0
Adjust the LPF of the playback RF amplifier (IC001).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Connection:
1) Input a 14.2MHz, 400mVp-p CW signal to Pin 7 of CN910
(RF AGC IN).
14.2 MHz 400 mVp-p
Signal
generator
47 Ω
Transistor : General NPN transistor (2SC403, etc)
47 Ω resistor :
1-249-401-11
1 k Ω resistor :
1-249-417-11
15 k Ω resistor :
1-249-431-11
0.01 µ F capacitor : 1-101-004-00
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
A
2) Select page: 2, address: 01, set data: 35, and press the PAUSE
button of the adjustment remote commander.
3) Select page: F, address: 6E, change the data and minimize the
14.2 MHz signal level (A).
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
6) Select page: 0, address: 01, and set data: 00.
5-38
VTR stop
No signal
Pin 9 of CN910 (RF AGC OUT)
Oscilloscope
F
6E
A= Minimum
RFU DC OUT jack
on PJ-92 board
(4.75 V)
1 k Ω
0.01 µ F
Pin 7 of CN910
(RF AGC IN)
Pin 8 of CN910
(REG GND)
15 k Ω
0.01 µ F
Fig. 5-3-10.
A
14.2MHz
Fig. 5-3-11.
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