2-4
Samsung Electronics
Alignment and Adjustment
2-2-3 Check Transitional Operation 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. 2-9).
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. 2-9 Video Envelope Rising when Operation
mode Changes from RPS to Play Mode
2-2-4 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 on
the unit using with T-120 (E-120).
The video envelope should meet the specification
as shown in Fig. 2-10.
In SP mode, (A) should equal (B).
If the head gap is wide, upper cylinder should be
checked.
A
B
Fig. 2-10 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.
2-3 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 spec. does not meet the followings speci-
fications, replace the holder clutch assÕy and then
recheck.
MODE
TORQUE g/cm
GAUGE
PB
NTSC 82.5 ± 27.5
Cassette Torquemeter
PAL 79 ± 27
RPS
145 ± 30
Cassette Torquemeter
<Table 2-1>
Summary of Contents for VR400PVR400PC
Page 16: ...Exploded View and Parts List 3 8 Samsung Electronics MEMO ...
Page 23: ...Schematic Diagrams Samsung Electronics 5 3 5 1 S M P S 120 Voltage ...
Page 24: ...Schematic Diagrams 5 4 Samsung Electronics 5 2 S M P S Free Voltage ...
Page 25: ...Schematic Diagrams Samsung Electronics 5 5 5 3 Power ...
Page 26: ...Schematic Diagrams 5 6 Samsung Electronics 5 4 Logic ...
Page 27: ...Schematic Diagrams Samsung Electronics 5 7 5 5 Audio Video ...
Page 28: ...Schematic Diagrams 5 8 Samsung Electronics 5 6 TM Block Input Ouput ...
Page 29: ...Schematic Diagrams Samsung Electronics 5 9 5 7 Display ...
Page 30: ...Schematic Diagrams 5 10 Samsung Electronics MEMO ...
Page 55: ...2 6 Samsung Electronics Alignment and Adjustment MEMO ...
