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GF-4646HT (B)
©
STRINGING OF DIAL CORD
1. Turn the drum fully in the direction
(A) shown in Fig. 8-1
and stretch its cord over the parts in the numerical order.
Dial Cord Wheel
2. The turn the tuning control shaft fully in the direction 8)
shown in Fig. 8-1 and fix its pointer as shown in Fig. 8-2. |
Pinch
roller
pressure
Torque
Azimuth
Dial Cord Spring
(127)
492mm
Figure 8—2
Tension gauge | Pinch roller
(500 g)
pressure spring
Torque meter
Play TW-2111
Fastforward
TW-2231
Rewind
TW-2231
Test tape
Azimuth
MTT-114
adjusting
screw
Test tape
Variable
MTT-111
resistor on
motor
Tuning Shaft
27
(121)
® 4 turns
Figure 8—1
MECHANICAL ADJUSTMENT
Tension gauge
Capstan
300-400 g
* If the reading is
outside the range
replace the pres-
|
sure spring of the
pinch roller
@
(Play : 35 — 60 g-cm)
(Fastforward :
35 — 60 g-cm)
Pressure roller
(Rewind :
spring
35 — 60 g-cm)
Figure 8-3 PINCH
ROLLER
PRESSURE
Sine waveform
E.V: ELECTRONIC
VOLTMETER
attain sine
DUAL-TRACE
meximnen.
SY NCROSCOPE
3,000 + 10Hz
PLAYBACK
Figure 8—4 AZIMUTH
RECORD/PLAYBACK
FREQUENCY
HEAD
SrEaReR)
COUNTER
PLAYBACK MODE
TEST TAPE
MTT-111
Figure 8—5 TAPE SPEED
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