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JC-272H
©
ADJUSTMENT
As for adjusting method refer to the relevant explanation in
Service
Manual
"ADJUSTMENT
PROCEDURES
OF AUDIO
PRODUCTS'.
MECHANISM
SECTION
* Driving Force check
;
Torque Meter
Play: TW-2412
Reverse play:
TW-2422
Specified value
Over 50g
Over 50g
* Torque Check
Torque Meter
Play:
TW-2111
Reverse play:
TW-2121
Fast forward:
TW-2231
Rewind:
TW-2231
Specified value
25 to 35 g.cm
25 to 35 g.cm
Over 50 g.cm
Over 50 g.cm
* Head Azimuth
Test Tape
Instrument Connection
Headphones
pineelie
(Load resistance: 16 ohms)
> Peel off the Seal sheet, and adjust through the adjusting hole.
(See Fig. 8-1)
- Tape Speed
Adjusting
sas
Instrument
Test Tape
Specified value
Camectan
Headphones
MTT-111
VR11
3,000 + 60 Hz | (Load resistance:
16 ohms)
TAPE SECTION
Position of each switch or control
Volume
Norma
Sarr
_
- Playback Amplifier Sensitivity check
Adjusting
Specified
Instrument
MTT-150
*1 if
24.5mV +1 dB | L: Pin 14 of IC2
measure-
R: Pin 3 of IC2
ment is low.
*2 if
measure-
ment is
high.
*1 Replace R23 and R24 with 1.5 kohm resistors.
(Resistance with respect to R11 and R12 (200 ohm) is 176 ohm)
*2 Cut pattern to add R21 and R22 (18 ohm).
(Resistance with respect to R11 and R12 (200 ohm) is 218 ohm).
ADJUSTING
HOLE
Figure 8-1
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