Sony TC-K222ESG - Page 11

3. Phase check
By the means of 6. Tape Path check on page 9
confirm that phase difference is proper.
4, After the adjustment, lock the adjustment screw
with locking compaund.
Adjustment Location :
adjustment screw
Tape Speed/WOW Check
Procedure:
test tape
WS-48S frequency counter
{2 kHz, 0 dB) & WOW meter
47 kQ
LINE OUT
Lor R-CH
1. Measure the output frequency and the WOW value
while playing back the tape top of the test tape.
2. Turn over the test tape, measure the output
frequency and the WOW value, and check the
difference from the values of the step 1.
Adjustment Limits :
TAPE SPEED deviation: within 2,990 to
3,010 Hz
within 2,990 to
3,010 Hz
0.04% or less
TAPE SPEED fluctuating width:
WOW (WRMS):
| TC-K222ESG/K850ES
Playback Level Adjustment
Procedure:
Mode: playback
test tape
P-4-1300
(315 Hz, 0dB) VTVM
jC
47 kK2
LINE OUT
Adjust RV101 (L-CH) and RV201 (R-CH) to ob-
tain the specified LINE OUT level.
Adjustment Limits :
LINE OUT level: 0.41 to 0.46 V
(—5.5 to —4.5 dB)
Level difference between channels:
less than 0.5 dB
Check that the LINE OUT level does not change in
playback mode while changing the mode from
playback to stop several times.
PB DOLBY NR Check
Procedure:
1. Mode: playback
test tape
P-4-100
(10 kHz, ~10 dB)
47 kQ
—om set 4 3 |
LINE OUT
2. Make sure that the output levels are different in
DOLBY NR OFF, B, and C.
Adjustment Limits :
OFF >B level difference
B >C_ level difference
-1 to -3 dB
1 to 3 dB
Meter Level Check
1. Apply 315 Hz 0.245V (-10dB) signal to LINE IN
and adjust REC VOL so that LINE OUT level is
0.4386V (-5dB), and then confirm that 0 VU
segments in level meter light or flicker. |
2. Adjust REC VOL to obtain 2.19V (9dB) output at
LINE OUT and confirm that all segments in level
meter light clearly.