Sharp QT-50Z, Service Manual

1. Turn the drum fully in the direction A shown in Fig. 

and stretch its cord over the parts in the numerical order.

2. The turn the tuning control shaft fully in the direction 

shown in Fig. 4-l and fix its pointer as shown in Fig. 4-2.

Figure 4-l

 ELECTRONIC VOLTMETER

D U A L - T R A C E

ITEM

USING JIG

I

ADJUSTMENT REMARKS (CHECK)

POINTS

More than 150 

Tape 
megurering
cassette

Torque meter

Play 

Fast-forward

Rewind

Driving
power

Torque

(Play: 

 g-cm)

 g-cm)

(Rewind 

 40 g-cm)

HEADPHONES

JACK 

Figure 4-3 AZIMUTH

R E C O R D / P L A Y B A C K

HEADPHONES

HEAD

PLAY BACK

COUNTER

Azimuth

Tape

TEST TAPE

 11

Figure 4-4 TAPE SPEED

 CASSETTE TYPE

TITLE

FLUTTER

MODEL

FREQUENCY/

LEVEL

APPLICATION

Tape 

MTT-111

3 

 -10 

Wow and flutter
check

MODEL

MEASUREMENT

RANGE

APPLICATION

TW-2111

Normal 

 Playback torque

Normal   

 tension

Reverse   Playback torque

1.5   

Reverse   Back tension

 1

30   200 g-cm

Fast-forward, Rewind torque

AZIMUTH

MTT-113

6.3

-10 

8 

 -10 

 14

-10 

adjustment

DISTORTION

MTT-118

1 

 -10 

Distortion check
level adjustment

Normal 

Driving power

Reverse   Driving power

Tone 200 

level 

BLANK

MTT-502

Record frequency

check