Read Sony GV-D200 Service Manual online
5-29
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.)
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)
(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.
Connect the measuring device as shown in the following figure,
and adjust.
2. IR Video Deviation Adjustment (VC-250 board)
Mode
VTR stop
Signal
Arbitrary
Measurement Point
VIDEO OUT terminal of IR receiver
jig (Terminated at 75
jig (Terminated at 75
Ω
)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
7E
Specified Value
A = 0.82 ± 0.05 V
Connection of Equipment:
Connect the measuring device as shown in the following figure,
and adjust.
Connect the measuring device as shown in the following figure,
and adjust.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
0C
08
Set the data, and press PAUSE
button.
button.
3
F
80
Change the data, and set the
video carrier frequency (f) to the
specified value.
video carrier frequency (f) to the
specified value.
4
F
80
Press PAUSE button.
5
3
0C
00
Set the data, and press PAUSE
button.
button.
6
0
01
00
Set the data.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
0C
01
Set the data, and press PAUSE
button.
button.
3
F
7E
Change the data, set the video
signal amplitude (A) to the
specified value.
signal amplitude (A) to the
specified value.
4
F
7E
Press PAUSE button.
5
3
0C
00
Set the data, and press PAUSE
button.
button.
6
0
01
00
Set the data.
Fig. 5-3-15.
Main unit
IR receiver jig
Pin
5
of
CN003
Frequency counter
Main unit
IR receiver jig
VIDEO
OUT
75
Ω
75
Ω
(1-247-804-11)
Oscilloscope
A
H
White
Fig. 5-3-14.
Fig. 5-3-16.
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