Servo And Rf System Adjustments - Sony HVR-A1J Service Manual

3-3.

SERVO AND RF SYSTEM ADJUSTMENTS

Before perform the servo and RF system adjustments, check that
the specified values of "Origin Oscillation check" of "1-3. CAM-
ERA SYSTEM ADJUSTMENTS" is satisfied.
Check that the data of page: 0, address: 10 is "00". If not, select
page: 0, address: 10, and set the data "00".
Adjusting Procedure:
1. CAP FG duty adjustment
2. Switching position adjustment
3. Error rate check
1. CAP FG Duty Adjustment (TT-001 board)
RadarW RadarW RadarW
Set the CAP FG signal duty cycle to 50% to establish an appropri-
ate capstan servo. If deviated, the uneven rotation of capstan and
noise can occur.
Mode VTR stop (PLAY/EDIT mode)
Signal No signal
Measurement Point Displayed data of page: 3, address:
03
Measuring Instrument Adjusting remote commander
Adjustment Page C
Adjustment Address 16
Specified value The data of page: 3, address: 03 is
"00"
Note 1: Check that the data of page: 0, address: 10 is "00".
Adjusting method:
Order Page Address Data
1
2 0 01 01
3 3 01 1B
4 3 02
5 3 03
6 0 01 00
Note 2: If the data is "01", adjustment has errors or the mecha-
nism deck is defective.
HVR-A1J/A1U/A1N/A1E/A1P/A1C
Procedure
Close the cassette compart-
ment without inserting
cassette.
Press PAUSE (Write) button.
Check the data changes in
the following order
"1B" t "2B" t "00"
Check the data is "00". (Note 2)
2. Switching Position Adjustment (TT-001 board)
RadarW RadarW RadarW
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified value
Note 1:Check that the data of page: 0, address: 10 is "00".
Adjusting method:
Order Page Address Data
1
2 0 01
3 C 10
4 3 21
5 3 01
6 3 02
7 3 03
8 0 01
Note 2: If the data is "72", the tape top being played. After play-
ing the tape for 1 to 2 seconds, stop it, perform step 5 and
higher.
If the data is "62", the tape end being played. After re-
wind the tape, perform step 5 and higher.
Note 3: If bit0 of the data is "1", the EVEN channel is defective.
If bit1 of the data is "1", the ODD channel is defective.
Contents of the defect is see written into page: C, ad-
dress: 10 and 12. See following table.
(For the bit values, refer to "6-4. SERVICE MODE",
"4-4. 3. Bit value discrimination".)
If bit3 of the data is "1", the tape end being played, so
rewind the tape and perform the adjustment again.
When the EVEN channel is defective
Data of page: C,
address: 10
EE
E8
E7
When the ODD channel is defective
Data of page: C,
address: 12
EE
E8
E7
6-116
VTR playback (PLAY/EDIT mode)
SW/OL standard (XH2-3)
Displayed data of page: 3, address:
03
Adjusting remote commander
C
10, 11, 12, 13
The data of page: 3, address: 03 is
"00"
Procedure
Insert the SW/OL standard
tape and enter the VTR stop
mode.
01
EE Press PAUSE (Write) button.
Check the data is "02". (Note 2)
0D Press PAUSE (Write) button.
Check the data changes to "00".
Check the data is "00". (Note 3)
00
Contents of defect
Writing into EEP ROM (IC5402) is
defective
Adjustment data is out of range
No data is returned from IC4001
Contents of defect
Writing into EEP ROM (IC5402) is
defective
Adjustment data is out of range
No data is returned from IC4001