Ir Video Carrier Frequency Adjustment (Vc-253 Board); Ir Video Deviation Adjustment (Vc-253 Board) - Sony DCR-PC110 Service Manual

3-5. IR TRANSMITTER ADJUSTMENTS
Adjust using a IR receiver jig (J-6082-383-A).
Switch setting:
LASER LINK ........................................ ON (Red LED is lit)

1. IR Video Carrier Frequency Adjustment (VC-253 board)

Mode VTR stop
Signal Arbitrary
Measurement Point Pin 5 of CN003 of IR receiver jig
(RF)(Or Pin qh of IC601 of VC-253
board)
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 6E
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. 5-3-11.
Adjusting method:
Order Page Address Data
1 0 01 01
2 3 0C 08
3 F 6E
4 F 6E
5 3 0C 00
6 0 01 00
Frequency counter
CN003
pin 5
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-253 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.
Main unit IR receiver jig
Adjusting method:
Order Page Address Data
1 0 01
2 3 0C
3 F 6D
4 F 6D
5 3 0C
6 0 01
5-49
VTR stop
Arbitrary
VIDEO OUT terminal of IR receiver
jig (Terminated at 75 Ω)
Oscilloscope
F
6D
A = 1.00 ± 0.05 V
Oscilloscope
75 Ω
VIDEO
OUT
75 Ω (1-247-804-11)
Fig. 5-3-12.
Procedure
01 Set the data.
02 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. 5-3-13.
A