Tg8 Guide Roller Height Adjustment (Fig. 4-2); Height Adjustment Of Guide Rollers No. 3 And No - Sony SLV-360 Service Manual

4-1-2. TG8 GUIDE ROLLER HEIGHT ADJUSTMENT
(Fig. 4-2)
Procedure:
1) Set the tape, during CUE playing back, check the height
from lower flange of TG7 to the running tape. (Fig. A)
2) During REV playing back, check the height from lower
flange of TG7 to the running tape. (Fig. B)
3) When the difference between items 1) and 2) doesn't go to
specified value, adjust by turning TG8 guide roller height
adjustment screw.
4) Check the tape is creased or not between the capstan and
TG8, adjust with TG8 guide roller height adjustment screw
so that the tape is not creased during normal playback, CUE
and REV.
TG8 height
adjustment
screw
Tape TG7 Tape TG7
if Hse
f{ —*CuUE |i =—REV
7] iD 8)
Lower Lower
flange flange
Fig. A Fig. B
Difference between @ and @ = 0 to 0.1 mm
Fig. 4-2
4-1-3. HEIGHT ADJUSTMENT OF GUIDE ROLLERS
NO. 3 AND NO. 6 (Fig. 4-3)
Playback
Alignment tape
Measuring instrument | Oscilloscope
CH-1: Connector PB RF pin for RF PC
board check.
CH-2: Connector RF SW P pin for RF
PC board check.
Guide roller height adjuster screw
Measunng point
Adjustment locations
[Adjustment Method]
1) Tracking (playback): Turn off the auto tracking, then press
the tracking buttons [VJ] and [A] simultaneously to set the
tracking at the center position.
(If adjustment is made after the drum is replaced, the
tracking must be set at the max. RF output position.)
2) Height adjuster screw: Even out the RF output waveforms.
3) Press the tracking buttons (playback), [VY] and [A] alternately.
4) Check that RF output drops the same amount at the front and
rear edges.
Turn the guide roller height adjuster screw
gradually to smooth out the waveforms.
TO mm
. a Turn the tracking control in
Center tracking position botfi directions:
Fig. 4-3