Sony TC-K333ESR Service Manual page 10

TC-K333ESR/K730ES
PB DOLBY NR Check
Procedure:
1. Mode: playback
test tape
P-4-100
(10 kHz, —10 dB)
ae OUT
. Make sure that the output levels are different in
DOLBY NR OFF, B, and C.
Specification:
OFF - B
B ©#C
—0.5 to —2.5 dB
—0.5 to —2.5 dB
level difference
level difference
MPX FILTER Check
Procedure:
1. Mode: stop
AF OSC
@) attenuator 19 kQ
—__a4
SHeOO 8h E
oO
LINE OUT
LINE IN
315 Hz, 0.25 V (—10 dB)
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. Apply 19 kHz, 0.25 V (—10 dB) signal and meas-
ure the LINE OUT level.
Specification:
DOLBY NR: OFF, FILTER: ON/OFF
0.49 to 0.39 V (—4 to —6 dB)
DOLBY NR: B, C, FILTER: ON
0.025 V (—30 dB) or less
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