Psd Sensor Gain Adjustment; Psd Sensor Gain Adjustment (1) - Sony DCR-TRV890E Service Manual

16. PSD Sensor Gain Adjustment

Adjust the gain of the PSD sensor for steady shot operation.

16-1. PSD Sensor Gain Adjustment (1)

Subject Pattern A
(1.5m from the front of the lens)
Measurement Point Video output terminal
Measuring Instrument Oscilloscope
(V period)
Adjustment Page E
Adjustment Address 48
Pattern A
White
Black
White
A4 size (297mm × 210mm)
Fig.5-1-12.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: E, address: 48, set data: 80, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 01, set data: 8F, and press the PAUSE
button of the adjustment remote commander.
4) Expose pattern A with the zoom TELE end.
5) Adjust the focus.
6) Measure the vertical position SV1 (msec) of the falling edge
of the waveform. (Oscilloscope is V period)
7) Select page: 6, address: 01, set data: 91, and press the PAUSE
button.
8) Measure the vertical position SV2 (msec) of the falling edge
of the waveform. (Oscilloscope is V period)
9) Obtain D48' using the following equation (decimal calculation).
NTSC model
' = 128 × (2.88/(SV2–SV1))
D
48
PAL model
' = 128 × (3.40/(SV2–SV1))
D
48
10) Convert D ' to hexadecimal notation, and obtain D
48
off to one decimal place)
(Refer to Table 5-4-1. "Hexadecimal notation-Decimal notation
conversion table" of "5-4. Service Mode". )
11) Select page: E, address: 48, set data: D
button of the adjustment remote commander.
Processing after Completing Adjustments
1) Select page: 6, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
2) Select page: 0, address: 01, and set data: 00.
3) Check that the steady shot operation is performed normally.
. (Round
48
, and press the PAUSE
48
5-19
V
Falling edge of
waveform when
data is "8F"
SV2 (msec)
SV1 (msec)
Fig. 5-1-13.
Falling edge of
waveform when
data is "91"
SV2–SV1