Samsung TB14C52S/XEC, Service Manual

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MODE TORQUE g/cm GAUGE
PB
NTSC 82.5 ± 27.5
Cassette Torquemeter
PAL 79 ± 27
RPS 145 ± 30 Cassette Torquemeter
Alignments and Adjustments (Mechanical)
4-24
Samsung Electronics
4-5-3 Check Transition from RPS to Play
Check transition from RPS mode to play mode :
Using a pre-recorded SP tape, make sure the entry
side of envelope comes to an appropriate steady state
within 3 seconds (as shown in Fig. 4-5-10).
If the envelope waveform does not reach specified
peak to peak amplitude within 3 seconds, adjust as
follows :
1. Make sure there is no gap between the supply
roller lower flange and the tape.
If there is a gap, adjust the supply guide roller
again.
2. Change operation mode from the RPS to the play
mode (again) and make sure the entry side of
envelope rises within 3 second.
ENTRANCE SIDE ENVELOPE
Fig. 4-5-10 Video Envelope Rising when Operation mode Changes
from RPS to Play Mode
4-5-4 Envelope Check
1. Make recordings on T-120 (E-120) and T-160
(E-180) tape.
Make sure the playback output envelope meets
the specification as shown in Fig. 2-10.
2. Play back a self recorded tape (recording made
onthe unit using with T-120 (E-120).
The video envelope should meet the specification
as shown in Fig. 4-5-11. In SP mode, (A) should
equal (B).
If the head gap is wide, upper cylinder should be
checked.
A
B
Fig. 4-5-11 Envelope Output and Output Level
2-2-5 Tape Wrinkle Check
1. Run the T-160 (E-180) tape in the playback, FPS,
RPS and Pause modes and observe tape wrinkle
at each guide.
2. If excessive tape wrinkle is observed, perform the
following adjustments in Playback mode :
3 Tape wrinkle at the guide roller S, T section :
Linearity adjustment.
3 Tape wrinkle at tape guide flange :
ACE head assembly coarse adjustment.
4-6 Reel Torque
1. The rotation of the capstan motor causes the
Holder Clutch AssÕy to rotate through the Belt
Pulley.
2. The spring wrap PLAY/REV of holder clutch
assÕy drives the disk reel S, T through gear idle by
rotation of gear center assÕy.
3. Brake is operated by slider cam at FF/REW mode.
4. Transportation of accurate driving force is done
by gears. (Gear Center AssÕy)
Note : If the specifications are not met, replace the
holder clutch assÕy and then recheck.
<Table 4-6>