Sony TC-K222ESG - Page 12

TC-K222ESG/K850ES
MPX FILTER Check
Setting: DOLBY switch: OFF
MPX FILTER switch: OFF
Procedure :
1. Mode: stop
AF OSC
C) attenuator 10 kX
x,
O
LINE OUT
LINE IN .
315 Hz, 0.25 V (—10 aB)
2. Apply 315 Hz, 0.25 V (—10 dB) signal and adjust
REC LEVEL control so that the LINE OUT level
is 0.44 V (—5 dB).
3. Set DOLBY switch to B or C and MPX FILTER
switch ON. Confirm that the LINE OUT level is
0.39V to 0.49V (-5dB + 1dB).
4. Apply 19kHz 0.25V (-10dB) signal and confirm
that the LINE OUT level is 0.014V (-35dB) or less.
Adjustment Limits :
LINE OUT level
315Hz 0.39V —0.49V (-5dB + 1dB)
19kHz 0.014V (-35dB)
Erase Current Adjustment
1. Mode: record
frequency VTV:
M
Genhter CNS65 yan bce
i | | 3
o—_————2)
, CEES |
2. Adjust RV573 so that the reading on VTVM is
105mV (erase current=105mA).
3. And then confirm that the reading on the
frequency counter is 160kHz.
Adjustment Limits :
Erase current: 105mA to 110mA
Frequency: 160 + 6kHz
Bias Current Adjustment
Note: This adjustment should be made before
Record Bias Adjustment.
Setting : HX PRO switch: ON
Procedure :
1. Preset RV152 (L-CH), RV252 (R-CH) and RV574
in the center position, and record with no signal.
2. Adjust T151 (L-CH) and T251 (R-CH) for
minimum readings on the digital voltmeter.
Adjustment Limits :
120mV or less.
digital
voltmeter
B+ (8.5V)
Record Bias and Record Level Adjustment
Setting:
REC LEVEL knob: standard record position
(See page 10.)
HX PRO switch: ON
Procedure:
1. Mode: simultaneous REC/PB
LINE IN
315Hz, 25mV (- 30dB) :
AF OSC 10kHz, 25mV (-30dB) no-signal tape
*) 10k2 CS-122
. Oo
oO
LINE OUT
2. Adjust RV153 (L-CH) and RV253 (R-CH) so that
the playback output level of 10kHz signal
is 0.2dB to 0.8dB with respect to that of 315Hz.
* ¢ «Record Bias Adjustment.
3. Adjust RV151 (L-CH) and RV251 (R-CH) so that
the playback output level of 315Hz is -25.3dB to
-24.7dB. * * *Record Level Adjustment.
(De.