MECHANISM
SECTION
TAPE
SECTION
. Driving Force check
I
Position of each switch or control
Volume
Beat cancel switch
1
Max
/
A
I
Toraue
Meter
I
Soecified
value
I
Play: TW-2412
Reverse play: TW-2422
. Torque Check
Over 50
g
Over
60
g
Graphic equalizer
Tape selector switch
Function
Dolby
NR
Swrtch
Center
Normal
Tape
Off
Torque Meter
Specified value
Taoe 1
Taoe 2
-a
/
Play: TW-2111 35 to
60
g.cm
30 to
60
g.cm
Reverse play: TW-2121 35 to 60
g.cm
30 to 60
g.cm
Fast forward: TW-2231 55 to 120
g.cm
55 to 120
q.cm
*
Bias
Oscillation Frequency check
Adjustment
ooint
Specified value
Rewind: TW-2231
+
Head Azimuth
55 to 120
g.cm
/
55 to 120
g.cm
1
L341
B:
104
t_
1.5 kHz
Beat cancel
-
A: -2
+
4
kHzforB
-
c: -8
&
2
kHzfor
B
Test Tape
MTT-114
Instrument Connection
J602
(Ext.
SP)
(Load resistance: 4 ohms)
9
Bias Current check
Adjustment
nnint
Specified value
I
. Tape Speed
+z”“#L
Resistor for
L:
VRlOl
Normal
CrO2
measurement: 10 ohm
R:
VR102 460
&
50
,~A/720
+
75
.uA
Test Tape Adjusting Point Specified value
Instrument
Connection
Normal
J602
speed
MTT-111 Tape 2: VR502 3,000
f
60 Hz
(Ext.
SP)
+
Erase Current check
t
,
I
I
1
(Load
I
I
Specified value
1
j
;ftil
j
/
MTT-111 Tape 2: VR501 6,000
f
700 Hz
/ /
;f;:;;e’
j
Resistor for
measurement: 1 ohm
Normal
1
CrOz
25*4mA145+7mA
To
set normal speed, short-circuit collector and emitter of Cl51 4.
-
Playback Amplifier Sensitivity check
I
Test Tape
I
Specified value
I
Instrument Connection
I
*
Tape
1
Playback Amplifier Sensitivity
Test Tape
Adjusting
Specified value
Instrument
Point Connection
MTT-
150
L: VR201
Normal: 580 mV
L: TP201
@
R:
VR202
R:
TP201 @
*
Tape 2 Playback Amplifier Sensitivity
Test Tape
Adjusting
Specified value
Instrument
Point Connection
MTT- 150
L: VR203
Normal: 580 mV
L: TP201
@
R:
VR204
R:
TP201
@
. Record/Playback Sensitivity
CASSETTE HOLDER COVER
Test Tape
Adjusting
Point
Specified value
Instrument
Connection
MTT-502
72
HEAD
Ti
REVERSE
i-1
FF
(FFI
HEAD
REVERSEI
HEAD
Figure 9 AZIMUTH POINTS
-9-
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