Sony GV-D200E, Service Manual, Page: 112 / 166

5-22
4-3. APC & AEQ Adjustment (VC-250 Board)
Mode Playback
Signal Recorded signal at “Preparations
before adjustments”
Measurement Point Pin
qh
of CN933 (RF MON) (Note 1)
Ext. trigger: Pin
qd
of CN933 (DV RF
SWP)
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 18, 19, 1B, 1C, 21, 2C
Specified Value The data of page: 3, address: 03 is “00”
Note 1: Connect a 75
Ω
resistor between Pin
qh
and Pin
6
(GND) of
CN933.
75
Ω
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 Procedure
1 0 01 01 Set the data.
2 C 18 25 Set the data, and press PAUSE button.
3 C 19 25 Set the data, and press PAUSE button.
4 C 1B 25 Set the data, and press PAUSE button.
5 C 1C 25 Set the data, and press PAUSE button.
6 C 21 CA Set the data, and press PAUSE button.
7 C 2C 03 Set the data, and press PAUSE button.
8 Playback the recorded signal at
“Preparations before adjustments”
9 2 2E 01
10 3 33 08 Set the data.
11 Confirm that the playback RF
signal is stable. (Fig. 5-3-6.)
12 3 01 07 Set the data, and press PAUSE button.
13 3 02 Check that the data changes from
“07” to “00” in about 20 seconds
after pressing PAUSE button.
14 3 03 Check that the data is “00”.
(Note3)
15 Perform “Processing after
Completing Adjustments”.
Note 3:
If the data is other than “00”, adjustment has errors.
4-4. Processing after Completing Adjustments
Order Page Address Data Procedure
1 0 01 01 Set the data.
2 2 2E 00 Set the data.
3 3 33 00 Set the data.
4 8 2A 00 Set the data, and press PAUSE
button.
5 0 01 00 Set the data.
Fig. 5-3-6.
13.3 msec
PB RF signal is stable
Pin
qd
Pin
qh