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Yamaha KX-E100 Service Manual page 10

Stereo cassette deck
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KX-E100
<Recording section>
Item to be
Step
Tape
Adjusted
1
Recording
AC-514
level
High
(CrO
)
2
2
Recording
AC-514
bias
High
(Total
(CrO
)
2
frequency
response)
AC-225
Normal
(LH)
3
Confirmation
AC-514
of recorded
High
level
(CrO
)
2
G
TOTAL FREQUENCY RESPONSE ( – 20 dBV)
Dolby NR OFF / B on / C on
Type I (Normal) / Type II (High) / Type IV (METAL)
± 3dB
± 4dB
50
250
315
9
Instrument
Measurement
Mode
required
conditions
ACVM
REC
Input 315 Hz Signal to
Audio
PLAY
LINE IN from Audio
frequency
Frequency Oscillator.
oscillator
Adjust output level of
Audio Frequency
Oscillator so that the
voltage of LINE OUT
becomes – 25 dBV.
ACVM
REC
Input 12.5 kHz Signal to
Audio
PLAY
LINE IN from Audio
frequency
Frequency Oscillator.
oscillator
Adjust output level of
Audio Frequency
Oscillator so that the
voltage of LINE OUT
becomes – 25 dBV.
ACVM
REC
Audio
PLAY
frequency
oscillator
± 3dB
± 4dB
1k
3k
10kHz
12.5kHz
Fig. D
Points of
Adjustment
measurement
parts
LINE OUT
VR203 (L ch)
VR204 (R ch)
LINE OUT
VR103 (L ch)
VR104 (R ch)
LINE OUT
Rating
Adjust for equal record and
playback levels.
(– 25 dBV ± 0.3 dBV)
Adjust for equal record and
playback levels.
(– 25 dBV ± 0.5 dBV)
Adjust for equal record and
playback levels. (Fig. D)
Perform record bias adjustment
of High (CrO
) tape again, if the
2
rating was not satisfied.
Confirm recorded level rating as
in step 1 when recorded level
rating is improper, go back to
step 1 and also carry out
adjustments in step 2 again.

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