Sony DCR-TRV240 Service Manual page 145

DCR-TRV240/TRV340
4-3. APC & AEQ Adjustment (VC-276 board)
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note 1: Connect a 75Ω resistor between Pin qh and Pin w; (GND) of
CN1108.
75Ω resistor (Parts code: 1-247-804-11)
Note 2: The "AGC Center Level Adjustment" must have already been
completed before starting this adjustment.
Adjusting method:
Order Page Address Data
1 0 01
2 C 18
3 C 19
4 C 1B
5 C 1C
6 C 21 CA
7 C 2C
8
9 <2> <4D> <40> Set the data. (Note3)
[7] [62] [01]
10 3 33
11
12 3 01
13 3 02
14 3 03
15
Note 3: < >: DCR-TRV240, [ ]: DCR-TRV340
Note 4: If the data is other than "00", adjustment has errors.
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Playback
Recorded signal at "Preparations
before adjustments"
Pin qh of CN1108 (RF MON) (Note 1)
Ext. trigger: Pin qd of CN1108 (RF
SWP)
Oscilloscope
C
18, 19, 1B, 1C, 21, 2C
The data of page: 3, address: 03 is "00"
Procedure
01 Set the data.
20 Set the data, and press PAUSE
button.
20 Set the data, and press PAUSE
button.
25 Set the data, and press PAUSE
button.
25 Set the data, and press PAUSE
button.
Set the data, and press PAUSE
button.
03 Set the data, and press PAUSE
button.
Playback the recorded signal at
"Preparations before adjustments"
08 Set the data.
Confirm that the playback RF
signal is stable. (Fig. 5-3-4.)
07 Set the data, and press PAUSE
button.
Check that the data changes from
"07" to "00" in about 20 seconds
after pressing PAUSE button.
Check that the data is "00".
(Note4)
Perform "Processing after
Completing Adjustments".
4-4. Processing after Completing Adjustments
Order Page Address Data
1 0 01
2 <2> <4D> <00> Set the data. (Note)
[7] [62]
3 3 33
4 8 21
5 0 01
Note: < >: DCR-TRV240, [ ]: DCR-TRV340
Pin qh
Pin qd
5-44
Procedure
01 Set the data.
[00]
00 Set the data.
00 Set the data, and press PAUSE
button.
00 Set the data.
PB RF signal is stable
13.3 msec
Fig. 5-3-4.
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