Sony HVR M25U - Professional Video Cassete recorder/player, Руководство по обслуживанию

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HVR-M25J/M25U/M25N/M25E/M25P/M25C
2-4. SERVO AND RF SYSTEM ADJUSTMENTS
Before perform the servo and RF system adjustments, check that
the specified values of “Origin Oscillation check” of “2-5. VIDEO
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 (VD-036 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 E-E
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 Procedure
1
Close the cassette compart-
ment without inserting
cassette.
2 0 01 01
3 3 03 FF
4 3 01 1B Press PAUSE (Write) button.
5 3 02
Check the data changes in
the following order
“1B”
t
“2B”
t
“00”
6 3 03 Check the data is “00”. (Note 2)
7 0 01 00
Note 2: If the data is “01”, adjustment has errors or the mecha-
nism deck is defective.
If the data is “80”, the mechanism deck is in emergency
state or the end of tape was detected.