Bias Trap Adjustment; Level Meter Calibration; Monitor: Source - Sony TC-K555ES Service Manual

TC-K555ES
Bias Trap Adjustment
Level Meter Calibration
Setting:
MONITOR: TAPE
TAPE: TYPE N
Setting:
MONITOR: SOURCE
Procedure:
Procedure:
1. Mode: record
VTVM
LINE OUT
1.94 V (BdB)
0.44 V (-5 dB)
1. record and playback mode
blank tape
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47kn
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LINE OUT
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LINE IN
333 Hz, 0.775 V (0 dB)
VTVM
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II
Specification:
LINE OUT level: less than 4.4 mV (-45 dB)
In record and forward mode, adjust LI0 1 (L-CH),
L201 (R-CH) so that the LINE OUT level is mini-
mum on the VTVM.
RV402
(R-CH)
RV302
(L-CH)
Note: Slide the REC LEVEL control rightward
slowly. (Be careful to peakhold indication.)
1. Set the REC LEVEL control so that the LINE
OUT level is -5 dB.
2. Adjust RV302 (L-CH) and RV402 (R-CH) so
that the LEDs including -4 dB (right-mostele-
ment) light up.
3. Set the REC LEVEL control so that the LINE
OUT level is +8 dB.
Make sure the LED meter indicates -4 dB (0
VU) in this time.
Adjustment Location:
- record board -
Ll01
(L-CH)
L201
(R-CH)
Adj ustmen t Loca tion:
- playback board -
-27-