Preparations Before Adjustments; Agc Center Level Adjustment (Vc-260 Board); Apc & Aeq Adjustment (Vc-260 Board) - Sony DCR-TRV15E Service Manual

4-2. AGC Center Level Adjustment (VC-260 board)

Mode Playback
Signal Recorded signal at "Preparations
before adjustments"
Measurement Point Pin w; of CN002 (RF MON) (Note 1)
Ext. trigger: Pin qj of CN002 (SWP)
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 1E
Specified Value The data of page: 3, address: 03 is
"00"
Note 1: Connect a 75Ω resistor between Pin w; and Pin ql (GND) of
CN002.
75Ω resistor (Parts code: 1-247-804-11)
Adjusting method:
Order Page Address Data
1
2 0 01 01
3 3 33 08
4
5 3 01 23
6 3 02
7 3 03
8
Note2: If the data of page: 3, address: 03 is other than "00", adjustment
has errors. (Take an appropriate remedial measures according to
the errors referring to the following table.)
Data Contents of defect
20 Perform re-adjustment. (Note 3)
30 The machine is defective
40 Perform re-adjustment. (Note 3)
50 The machine is defective
Note 3: If this data is displayed twice successively, the machine is defective.
PB RF signal is stable
Pin w;
Pin qj
Fig. 5-3-4.
Procedure
Playback the recorded signal at
"Preparations before
adjustments"
Set the data.
Set the data.
Confirm that the playback RF
signal is stable. (Fig. 5-3-4.)
Set the data, and press PAUSE
button.
Check that the data is "00".
Check that the data is "00".
(Note2)
Perform "APC & AEQ
Adjustment".
6.7 msec
4-3. APC & AEQ Adjustment (VC-260 board)
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note 1: Connect a 75Ω resistor between Pin w; and Pin ql (GND) of
CN002.
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
2 0 01
3 3 33
4
5 3 01
6 3 02
7 3 03
8
Note3: If the data is other than "00", adjustment has errors. Take an
appropriate remedial measures according to the errors referring to
the following table.
Data Contents of defect
20 Perform re-adjustment. (Note 4)
30 The machine is defective
50 Perform re-adjustment. (Note 4)
60 The machine is defective
80 The machine is defective
Note 4: If this data is displayed twice successively, the machine is defective.
Pin w;
Pin qj
5-43
Playback
Recorded signal at "Preparations
before adjustments"
Pin w; of CN002 (RF MON) (Note 1)
Ext. trigger: Pin qj of CN002 (SWP)
Oscilloscope
C
18, 19, 1B, 1C, 21, 2C
The data of page: 3, address: 03 is
"00"
Procedure
Playback the recorded signal at
"Preparations before
adjustments"
01 Set the data.
08 Set the data.
Confirm that the playback RF
signal is stable. (Fig. 5-3-5.)
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".
(Note3)
Perform "Processing after
Completing Adjustments".
PB RF signal is stable
6.7 msec
Fig. 5-3-5.