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TC-K333ESA/K990ES
|
Adjustment Limits:
LINE OUT level: 0.301 to 0.338V
(-8.2 to -7.2dB)
Level difference between channels:
less than 0.5dB
Check that the LINE OUT level does not change in
playback mode while changing the mode from playback
to stop several times.
3. Phase check
— Play mode —
Reference
tape
for adjustment
'P~4-A100
(10kHz, ~10d8)
Oscilloscope
L-CH
47k
Line
OUT
4, Check that the phase difference between L—ch and R—ch
is within 0 ~
(same to 90°
)
Bias OSC Frequency Adjustment
Procedure:
1. Record mode
blank
tape
1. Connect the frequency counter to the inductor which
functions at 1OmH.(When the inductor is a closed mag-
netic circuit, redesign the inductor to be anopenmagnetic
circuit.)
2. Remove
the cassette lid, insert the cassette, and put the
unit into REC mode.
3. Move the inductor from the side in close to the erase
head to check the value of the bias.
4. Adjust CPSO1
so that the reading on the frequency
counter is 1OSkHz + 1kHz.
Bias current adjustment
.
1. Set the HX PRO switch to ON and insert the METAL
tape.
2. Set RV104, RV204, RV105, RV205, RV106, and RV206
to be in the center position.
3. Connect a digital voltmeter to CNE504(between 2~1 and
2~—3) and adjust the adjustment cores of T101 and T201
so that the voltage is minimized.
CrO. Bias and Record Level Adjustment
Note: This adjustment should be made before Record Bias
Adjustment.
Setting:
REC LEVEL
knob: standard record position.
(See page 12.)
HX PRO switch: ON
Procedure:
1. Mode: simultaneous REC/PB
LINE
IN
315Hz. 25mV (- 30d8)
.
AF
ose
10kHz,
25mV
(-30dB)
no-signal tape
E>}
10kn
CS-222
attenuetor
{e)
re,
11 O00
3
—_
LINE
OUT
2. Adjust RV106(L—CH)and
RV206(R-CH)so
that the
playback output level of 10kHz signal is 0.3dB —0.3dB
with respect to that 315Hz. *** Record Bias Adjustment.
3. Adjust RV102(L—CH)and
RV202(R-CH)so
that the
playback output level of 315Hz is ~25.3dB to -24.7dB.
eee Record Level Adjustment.
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