Ir Transmitter Adjustments; Ir Video Carrier Frequency Adjustment (Mi-37 Board); Ir Video Deviation Adjustment (Mi-37 Board) - Sony DCR-TRV120 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
(MI-37 board)
Mode VTR stop
Signal No signal
Measurement Point Pin 5 of CN003 of IR receiver jig (RF)
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 80
Specified Value f=11.85 ± 0.05 MHz (NTSC model)
f=11.55 ± 0.05 MHz (PAL model)
Note: NTSC model: DCR-TRV120/TRV120P
PAL model: DCR-TRV120E/TRV125E/TR8000E/TR8100E
Connection of Equipment
Connect the measuring device as shown in the following figure,
and adjust.
Main unit IR receiver jig
Fig. 5-3-14
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 08, and press the PAUSE
button of the adjustment remote commander.
3) Select page: F, address: 80, change the data, and set the video
carrier frequency (f) to the specified value.
4) Press the PAUSE button.
5) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
6) Select page: 0, address: 01, and set data: 00.
Frequency counter
Pin 5 of
CN003

2. IR Video Deviation Adjustment (MI-37 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:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 01, and press the PAUSE
button of the adjustment remote commander.
3) Select page: F, address: 7E, and change the data, set the video
signal amplitude (A) to the specified value.
4) Press the PAUSE button.
5) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
6) Select page: 0, address: 01, and set data: 00.
White
A
5-50
VTR stop
No signal
VIDEO OUT terminal of IR receiver jig
(Terminated at 75 Ω)
Oscilloscope
F
7E
A=0.82 ± 0.05 V
Oscilloscope
75 Ω
VIDEO
OUT
75 Ω (1-247-804-11)
Fig. 5-3-15
H
Fig. 5-3-16