Sony DCR-HC39E Service Manual page 209

4-5. Tape Run Check
1) Play back the tracking alignment tape (XH 2-1) (Ref. No. J-5).
Establish the CUE mode first then the REV mode. Confirm in
the respective modes that there are no large tape curls at the
upper flange of TG3 and TG5. Then confirm in the respective
modes that there are no large tape curls at the upper and lower
flanges of TG1 and TG7.
T reel table
Pinch roller
Capstan
TG7 guide TG6 guide TG5 guide
Tape must run while maintaining contact with the
upper flange. There must not exist a large tape curl.
There must not exist
a large tape curl.
Capstan
TG6 TG5
TG7
Fig. 4-10
S reel table
TG1 guide
Drum
TG3 guide
TG4 guide
TG2 guide
(tension regulator)
There must not exist
a large tape curl.
FWD
Tape
TG4 TG3 TG2
TG1
DV MECHANICAL ADJUSTMENT MANUAL VII
4-6. Check upon Completion of Adjustment
1. Tracking Check
1) Play back the tracking alignment tape (XH 2-1) (Ref. No. J-5).
2) Establish the CUE (or REV) mode. Take the amplitude (A)
in this mode as the 100% waveform amplitude. (Refer to Fig.
4-11.)
3) Establish the FWD mode. Confirm that the difference between
the minimum (E min) and the maximum (E max) is less than
30%. (When taking the amplitude (A) in the CUE or REV mode
as 100%)
CUE/REV mode
FWD mode
E min: Minimum amplitude
E max: Maximum amplitude
(E max – E min)
4) Confirm that the RF waveform does not have excessive
fluctuation of amplitude. (Fluctuation of amplitude should be
10% or less at both entrance side (B) and exit side (C), when
taking the amplitude (A) in the CUE or REV mode as 100%)
FWD mode
B 10%
— 51 —
A=100%
E max
E min
3
30% or ( A)
10
Fig. 4-11
C 10%
Fig. 4-12