Sharp QT-50Z - Stringing of Dial Cord; Mechanical Adjustment

STRINGING OF DIAL
CORD
Pulley
(227)
1. Turn the drum fully in the direction A shown in Fig. 4-1
and stretch its cord over the parts in the numerical order.
2. The turn the tuning control shaft fully in the direction B
shown in Fig. 4-l and fix its pointer as shown in Fig. 4-2.
Figure 4-l
MECHANICAL ADJUSTMENT
E.V: ELECTRONIC VOLTMETER
DUAL-TRACE
SY NCROSCOPE
ITEM USING JIG
I
ADJUSTMENT REMARKS (CHECK)
POINTS
More than 150 g
Tape tention
megurering
cassette
TW-2412
Torque meter
Play -rw-2111
Fast-forward
TW-2231
Rewind
TW-2231
Driving
power
Torque
(Play: 30-60 g-cm)
(Fastforward :
80-140 g-cm)
(Rewind :
80-l 40 g-cm)
1
HEADPHONES
JACK IRIGHT)
Figure 4-3 AZIMUTH
RECORD/PLAYBACK
HEADPHONES
..-..
FRECXJENCY
HEAD
.lAtiK
PLAY BACK
/
COUNTER
M
Azimuth
Tape
spa&
TEST TAPE
m-r-1 11
Figure 4-4 TAPE SPEED
TEST
TAPES
1 TORQUE METER FOR COMPACT CASSETTE
COMPACT CASSETTE TYPE
TITLE
FLUTTER
MODEL
FREQUENCY/
LEVEL
APPLICATION
Tape speed,
MTT-111 3 kHr, -10 -10
Wow and flutter
check
MODEL
MEASUREMENT
RANGE
APPLICATION
TW-2111
lo- 16Ogcm
Normal : Playback torque
1.5-log-cm
Normal : Back tension
TW-2121
lo- 1OOgcm Reverse : Playback torque
1.5 - log-cm
Reverse : Back tension
TW-223 1
30 - 200 g-cm Fast-forward, Rewind torque
AZIMUTH
MTT-113
6.3 kHz, -10 dB
MTT-113C
8 kHz, -10 d6
Head arimuth
MTT-I 14
10 kHz, -10 d6
adjustment
DISTORTION
MTT-118
1 kHz, -10 dB
Distortion check
level adjustment
TW-2412 o-3oog
TW-2422 o-3oog
Normal :
Driving power
Reverse : Driving power
1 U&‘L’ELI MTT-150 1 Dolby B-Type / DoIN NR B-type 1
Tone 200 m&/m
level adlustment
BLANK
MTT-502
Record frequency
-
check
-4-