Adjustment - Sharp Gf-320H Serviceanleitung

ITEM JIG

ADJUSTMENT

Driving
Tape tension
measuring
power
cassette
TW-2412
Torque Torque meter
Play TW-2111
Fast-forward
TW.2231
Rewind
TW.2231
Azimuth Test Tape Azimuth
MTT-113C adjusting screw
T ape Test tape Variable
speed MTT-111
on
SETTING • Volume control:
POSITION OF • Balance control:
SWITCH AND • Graphic equalizer: Center
KNOB • Function selector
• Beat cancel switch:
ITEM INPUT ADJUST-
BIAS
OSCILLATION
FREQUENCY
ERASE
CURRENT
Test tape
PLAYBACK
AMPLIFIER MTT-118
SENSITIVITY
MECHANICAL
REMARKS (CHECK)
POINTS
{More than 140 g)
(Play:
30 — 60 g•n)
( Fast-forward:
55 — 110 g-cm)
(Rewind:
SS — 110 g-crn)
Sine waveform
attains the
maximum.
resistor
3 000 —60
motor
CIRCUIT ADJUSTMENT
Maximum
Center
switch: Tape
A
REMARKS (CHECK)
MENT
POINT
(A: ± 4 kHz)
(B; 62.5 ± 4 kHz)
(C: 54.5 ± 4 kHz)
{90 ± 20 mA)
(1.2V ± 3 dB)
ADJUSTMENT
E.v: ELECTRONIC
Playback Terminat
Mode
Test Tape
Unit
MTT-11 ac
Record/Playback
Head
Figure 9—1
Playback
Mode
Test Tape
unit
MTT-111
Record/Playback
Head
Figure
(AUDIO SECTION)
E.V: ELECTRONIC VOLTMETER
Record
Record/Playback
Mode
Head
Unit
1 ohm
GND
Figure 9 —3
BIAS OSCILLATION
Record
Mode
Unit 1 ohm
GND
Figure
Playback
Test Tape
Unit
MTT-118
Record/P!ayback
Figure PLAYBACK AMPLIFIER SENSITIVITY
GF-320H/E
VOLTMETER
Dual •trace
External
Syncroscope
Speaker E.V.
CHI CH2
4 ohms x 2
GND
AZIMUTH
External
Speaker
F requency
Terminal
Cou nter
ooo
GND
4 ohms
TAPE SPEED
Oscilloscope
E.V.
Frequency
Counter
FREQUENCY
Erase
Oscilloscope
Head
E.V.
ERASE CURRENT
External
Oscilloscope
Speaker E.V.
Terminal
GND
4 ohms