13
Tape Speed Adjustment
Procedure:
Mode: playback
1. Set to the test mode (See page 12).
2. Press the H button to playback.
3. Adjust RV301 so that the frequency counter reading becomes
3,000±90 Hz.
4. Frequency difference between the beginning and the end of
the tape should be within 3%.
Adjustment Location: MAIN board (See page 14)
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48B)
Playback Level Adjustment
Procedure:
Mode: playback
Adjust RV121 (L-CH) and RV221 (R-CH) so that the reading on
level meter meets the adjustment limits below.
Adjustment Limits:
LINE OUT level: –7.7±0.5 dB (0.301 to 0.338 V)
Level difference between channels: within 0.5 dB
Check that the LINE OUT level does not change even if playback
and stop operation is repeated several times.
Adjustment Location: MAIN board (See page 14)
+
–
set
LINE OUT jack (J301)
frequency counte
test tape
WS-48B
(3 kHz, 0 dB)
47 k
Ω
+
–
set
LINE OUT jack (J301)
47 k
Ω
test tape
P-4-L300
(315 Hz, 0 dB)
level meter
Bias Consumption Current Adjustment (TC-RE340 only)
Procedure:
1. Set RV141 (L-CH) and RV241 (R-CH) to mechanical center
and turn the set recording mode.
2. Connect digital voltmeter as shown by the following table.
3. Press the H button to playback.
4. Adjust the following transformers for the minimum readings
on the digital voltmeter.
Measurement Point Adjustment Part Value
L-CH TP301 pin 2 and 3 T101
minimum
R-CH TP301 pin 1 and 2 T201
Specified value: Maximum 220 mV
Adjustment Location: MAIN board (See page 14)
Record Bias Adjustment
Setting:
[REC LEVEL] volume: standard record position (See page 12)
Procedure:
Mode: record and playback
1. Set to the test mode (See page 12).
2. Press the [REC ] button then the H button to start record-
ing.
3. Press the x button to stop recording and press the H button
to playback.
4. Adjust TC-KE240: RV142 (L-CH) and RV242 (R-CH), TC-
RE340: RV141 (L-CH) and RV241 (R-CH) so that 10 kHz
playback output is 0±0.3 dB relative to the 315 Hz output.
Adjustment Location: MAIN board (See page 14)
–
+
set
LINE IN jack (J301)
(no signal)
TP301
3
2
1
L-CH
R-CH
47 k
Ω
digital voltmeter
CS-413 blank tape
set
47 k
Ω
AF OSC
Attenuator
LINE IN jack (J301)
315 Hz
10 kHz
50 mV (–23.8 dB)
600
Ω
10 k
Ω
CS-123
blank tape
LINE OUT jack (J301)
level meter
+
–
TC-KE240
TC-RE340
adjustment screw
adjustment screw
z
Adjustment Location: record/playback head
w
w
w
.
x
i
a
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3
.
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9
2
8
9
4
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9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
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Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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