Sony Betacam SX DNW-A100 Maintenance Manual page 168

4-2. TAPE Maintenance Mode (M0)
4-2-3. RF CHECK Mode (C1)
For Condition NG
Confirm, recheck, and clean the drum (video heads)
according to the procedures below.
(1) If a check is performed using alignment tapes other
than SR5-1/SR5-1P, recheck using alignment tape
SR5-1/SR5-1P.
If no abnormality is found, the check is completed.
n
If no abnormality is found during check using an
alignment tape, a trouble (tape is damaged or record-
ing is not done properly) is considered to exist in the
previously played back tape.
(2) Change the playback portion on the alignment tape,
then recheck.
If no abnormality is found, the recheck is completed.
(3) Recheck using an alignment tape after cleaning using a
cleaning tape (in Section 5-2-1).
If no abnormality is found, the recheck is completed.
(4) Recheck using an alignment tape after cleaning using a
cleaning tape again (the amount of the tape used is 15
seconds).
If no abnormality is found, the recheck is completed.
(5) Recheck using an alignment tape after cleaning the
video heads with cleaning cloth reffering to Sections
5-2-2 and 5-2-3.
If no abnormality is found, the recheck is completed.
4-34
If the error condition is not improved in the way mentioned
above, the possible cause below are considered.
. VTR's servo system adjustment defect or circuit defect
8 Readjust the servo system. (A0 : SERVO ADJUST)
8 Check the servo system. (C03 : REEL/CAPSTAN
MOTOR & FG CHECK)
. RF system adjustment defect
8 Readjust the RF system. (A1 : RF ADJUST)
. Worn PB head in the drum assembly
8 After confirming the hours meter (H02 : DRUM
RUNNING HOURS), replace the upper drum
assembly as required.
(Refer to the maintenance manual part 2, volume-
1.)
. Adjustment defect in tape transport system or component
part installation defect
8 Readjust the tape transport system or reinstall the
parts.
(Refer to the maintenance manual part 2, volume-
1.)
. EQ-56 board defect
. Drum assembly defect
DNW-A100/A50/A45
DNW-A100P/A50P/A45P