Sharp RT-W500H - Mechanical Adjustment; Drive System and Alignment

0
MECHANICAL ADJUSTMENT
Dual-trace
Electronic Oscilloscope
Head
Figure IO- 1 AZIMUTH
A S Small as Possible
ic
ITEM
ADJUSTMEN
POINTS
IT
7
-I-
~
d
1
USING JIG
Tape tention
measuring
cassette
TW-2412
REMARKS
(CHECK)
lriving
lower
(More than 140 g)
-est
/ITT
rorque
Torque meter
Play
TW-2111
Fast-forward
TW-2231
Rewind
TW-2231
-
(Play: 30-60 g-cm1
(Fast-forward:
55-l 10 g-cm)
(Rewind:
55- 110 g-cm)
Test tape
MTT-114
izimuth
adjusting screw
Sine waveform
attains the maximur
izimuth
rape speed Test tape
High speed
MTT-111
Normal
speed
MTT-111
High speed
Deck 1: 6,000 T,“,” k
Deck 2: 6,000 +2Ok
-40
Normal speed
Deck 1: 3,000 I:,” t
Deck 2: 3,000 ilOk
-20
l Perform the high
speed adjustment
first and then the
normal speed ad-
justment.
iigh speed
Ieck 1: VR401
Ieck 2: VR40:
dormal speed
leek 1: VR40;
leek 2: VR40L
’ Short TPI an
ground when
performing tt
high speed as
justment.
Figure 10-2 AZIMUTH WAVEFORM
Record/Playback
Test Tape
MTT-111
j-0
GND I
Figure 1 O-3 TAPE SPEED
1 MAIN PWB-AI 1
LINE
DIN
IN
RECORD/PLAYBACK
-
1 Deck 2 Speed I
HIGH SPEEDTPl
DR-ch
VR204
(f I
(GNDI
ERASE CURRENT
fTP201)
IGND)
BIAS CURRENT
ITPIOII
CNS I
1
I
Figure IO-4 ADJUSTMENT POINTS
-lO-