Sharp RX-100H Serviceanleitung Seite 22

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1. Adjustment of AD Iref
Set record VR and playback VR to maximum, mounta blank
tape, and set record halt state.
Adjusting
Setting/ Adjusting
ecient
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Part
2. Adjustment of Digital Offset
Set LINE IN to no-input short-circuiting.
Mount a biank tape, and set record halt state.
Part oo
VR151(Lch) | 2.3+02V
R193({22 kohm) L ch
R194(22 kohm) R ch
VR1T52(R ch
3. Adjustment of Comparator Voltage
Set LINE IN to no-input short-circuiting.
Mount a blank tape, and set record halt state.
Part
Set output to min. LINE IN
VR156(R ch LINE OUT
4. Adjustment of DA-90dB
This adjustment needs -90 dB digital signal. If this signal is
not available, do not turn the semi-fixed VR.
lf adjustment is unavoidable, apply digital signal of Fs = 1
kHz, -90dB.
Adjusting
Instrument Connection
Part
VR159(R ch) | Set distortion LINE OUT
VR16Q{L ch factor to min
Adjustment of Reel Sensor
Mount a tape, and set FF/REW made.
Adjusting
Part
Setting/Adjusting
- +
Instrument Connection
+
:
OSILLOSCOPE
ATTENUATOR (FIXED)
AD IREF
Figure 32-1
ELECTRONIC VOLTMETER
R193¢L-ch)
R194¢R-ch)
GND
DIGITAL OFFSET
Figure 32-2
DISTORTION METER
LINE IN
(FIXING)
SHART
COMPARATOR VOLTAGE
Figure 32-3
DIGITAL SIGNAL
GENERATOR
1KHzZ=Fs -90dB
DISTORTION
METER
DA-90dB
Figure 32-4
OSCILLOSCOPE
REEL SENSOR
Figure 32-5
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