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C-3RX |
12
;
MEASURING
ADJUST
POINT:
(or CHECK)
ITEM
SETTING
INPUT SIGNAL
RESULT
e Connection:
Fig. 5-1, but engage 1-kHz filter.
e@ Record a 1-kHz signal. Push REC MUTE button for several seconds. Rewind
and play the tape. Find the difference between the 1-kHz portion and the
"no-signal'' portion.
. REC MUTE
function
LINE IN:
no signal
e Connection:
Fig. 5-1, but do not connect LINE IN (R), and engage 1-kHz
filter.
@ Set the deck to record mode. Find the difference between the 1-kHz
recorded portion (L-ch) and the "no signal' portion (R-ch).
. Channel separation
LINE IN:
ye
BIAS, EQ:
Co(CrO2)
L-ch 1 kHz/—9 dB
OUTPUT:
Tape: MTT-5061
(275 mV)
35 dB min. ratio
R-ch_
No signal
e Connection:
Fig. 5-1, but do not connect LINE IN (L) and OUTPUT
(L).
e Record:a 125-Hz signal on R-ch and note output level. Invert tape
and play R-ch track. Check leakage level against the output reference
of previously recorded portion.
LINE IN:
f
L-ch No signal
OUTPUT:
R-ch
125 Hz/—9 dB
40 dB min. ratio
(275 mV)
21. Adjacent track
crosstalk
BIAS, EQ:
Co(CrO)
Tape:
MTT-5061
@ Record a 1-kHz signal with NR SYSTEM
switch OUT, Play this portion
with NR SYSTEM switch set to OUT and set to NR. Obtain the difference
in output level between OUT and NR positions. Repeat the above process
using a 10-kHz signal.
OUTPUT:
DOLBY NR effect
BIAS, EQ: Co(Cr02)
LINE IN:
"UT
Tape: MTT.5061
1 kHz/—29 dB
Variation of
Pe:
(27.5 mV)
3 dB to 8dB
OUTPUT:
Variation of
8 dB to 12 dB
;
10 kHz/—39 dB ©
Tape: MTT-5061
(8.69 mv)
BIAS, EQ: Co(CrO2)
INPUT: TEST
:
Tape: MTT-5061
_ ADJUST/PRE-SET
sw.:
R35/R45 fully CCW ( O )
R30/R40 fully CW (>)
Record-pause mode
1 kHz/—-29 dB
RECORD cont's
| OUTPUT:
MONITOR sw.:
SOURCE
(27.5 mV)
(L/R)
—25 dB (43.6 mV)
Record-pause mode
ry eee) dB
PEAK
LEVEL meter:
MONITOR sw.:
SOURCE
(27.5 mv)
0 dB +2 dB
While rotating R35/R45 trim-pots clock-
wise, check that the difference in
OUTPUT level between the setting where
R35/R46
a maximum output value is obtained and
when the trim-pot is set fully clockwise
is more than 4 dB.
Set R35/R45 in the position correspond-
ing to maximum output value. Check that,|
R30/R40
when R30/R40 is rotated from fully CW
variable range
Position to fully CCW position, OUTPUT
| checks
level is reduced by more than 10 dB.
:
OUTPUT:
Record-play mode
en eae aB
Equal level with
;
MONITOR sw.: TAPE
{
(27.5 mV)
sap eetebes switch,
SOURCE
TAPE and SOURCE
LINE IN:
ADJUST
LINE IN:
Check
LINE IN:
1 kHz/—29 dB
(27.5 mV)
Record-play mode
checks
23. BIAS/REC
CALIBRATION
(on front panel)
LINE IN:
1 kHz/—29 dB
(27.5 mV)
Record-play mode
MONITOR
sw.:
TAPE
R30/R40_
;
OUTPUT:
Record-play mode
400 Hz/—29 dB
MONITOR sw.: TAPE
6.3 kHz/—29 dB
RSeihae
es poral gata!
12.5 kHz/—29 dB
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