Sony GV-D200E, Service Manual

Page: 119 / 166

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.)
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.
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
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.
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.
3 F 80 Change the data, and set the
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.
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.
3 F 7E Change the data, set the video
signal amplitude (A) to the
specified value.
4 F 7E Press PAUSE button.
5 3 0C 00 Set the data, and press PAUSE
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.