Sony GV-D200 Service Manual page 64

3-6. IR TRANSMITTER ADJUSTMENTS
Adjust using the IR receiver jig (J-6082-383-A).
Note: If the distance between the IR receiver jig and the VCR is below
1m, cover the LASER LINK emitter with a ND filter. (For example,
when the distance is 30cm to 50cm, cover the LASER LINK emitter
with a ND filter 1.0.)
Switch setting:
LASER LINK ........................................ ON (Red LED is lit)
1. IR Video Carrier Frequency Adjustment
(VC-250 board)
Mode VTR stop
Signal Arbitrary
Measurement Point Pin 5 of CN003 of IR receiver jig (RF)
(Or Pin qh of IC3901 of VC-250 board)
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 80
Specified Value f = 11.85 ± 0.05 MHz
Connection of Equipment:
Connect the measuring device as shown in the following figure,
and adjust.
IR receiver jig
Main unit
Fig. 5-3-14.
Adjusting method:
Order Page Address Data
1 0 01 01
2 3 0C 08
3 F 80
4 F 80
5 3 0C 00
6 0 01 00
Frequency counter
Pin 5 of
CN003
Procedure
Set the data.
Set the data, and press PAUSE
button.
Change the data, and set the
video carrier frequency (f) to the
specified value.
Press PAUSE button.
Set the data, and press PAUSE
button.
Set the data.
2. IR Video Deviation Adjustment (VC-250 board)
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Connection of Equipment:
Connect the measuring device as shown in the following figure,
and adjust.
IR receiver jig
Main unit
Adjusting method:
Order Page Address Data
1 0 01
2 3 0C
3 F 7E
4 F 7E
5 3 0C
6 0 01
White
A
5-29
VTR stop
Arbitrary
VIDEO OUT terminal of IR receiver
jig (Terminated at 75Ω)
Oscilloscope
F
7E
A = 0.82 ± 0.05 V
Oscilloscope
75 Ω
VIDEO
OUT
75 Ω (1-247-804-11)
Fig. 5-3-15.
Procedure
01 Set the data.
01 Set the data, and press PAUSE
button.
Change the data, set the video
signal amplitude (A) to the
specified value.
Press PAUSE button.
00 Set the data, and press PAUSE
button.
00 Set the data.
H
Fig. 5-3-16.