Tape Recorder - Hitachi TRK-8190E Service Manual

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| TRK-8190E, E(BS)
Adjustment:
tp
g
Dial pointer
Reading
L+R (1kHz):
1) After feeding in of R channel and pilot signals, adjust
RT301
8. FM tuning level adjustment
'mod.
output is maximum.
Pilot (19kH2):
TAPE RECORDER
SECTION
20mvV, 10%
The following adjustments shall be performed in the sequence stated after the heads, the pressure roller and the capstan
shaft were cleaned with a cleaning stick moistered in alcohol.
2) Optimize RT301 so that the leak level of the L channel
signal is equal to that of the R channel signal.
1. Tape speed adjustment (motor speed)
Setting ; Playback mode
Connections :
Record/playback
socket (output)
Frequency counter
(3150 Hz")
Ground
* According to DIN 45 500.
Adjustment : Warm-up the unit for approx. 20 minutes.
Then playback the Test Tape MTT-111, 3000 Hz (3150 Hz*) and
measure the speed deviation with the frequency counter.
If required, adjust the semi-variable resistor in the motor until
the frequency counter shows 3000 Hz bie Hz (3150 Hz"). The measurement shall be performed at the middle of the tape.
2. Head azimuth adjustment
Setting : Playback mode
Connections :
Record/playback
socket (output)
Adjustment : Playback the Test
Tape (MTT-316
or
MTT-216,
12.5 kHz)
and
adjust the azimuth adjusting screw until
Maximum output is obtained.

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