Teac X-10R - 3 Electrical Adjustments and Checks; 3-1 Monitor Performance Checks

10
X-10R/X-10
3 ELECTRICAL ADJUSTMENTS AND CHECKS
NOTES
1. The following data in both the charts and the illustrations are
for the X-10R. All the procedures, however, are applicable to
the X-10 except for those relating to the REVERSE direction.
2. Before performing adjustments and checks, clean and demag-
netize the entire tape path.
3. Check that the deck is properly set for the voltage in your lo-
cality.
3-1 MONITOR PERFORMANCE
MONITOR sw.—
SOURCE
OUTPUT cont.—
CAL
LINE cont.-MAX
MIC cont.—MIN
OSC > ATT to
LINE IN (L)
AC voltmeter to
VR PCB terminal
1. dbx level
LINE spec.
input level
condition
LINE IN (R)
#14 —> #17
2. MONITOR LINE spec.
output input level
level condition
LINE spec.
input level
condition
LINE cont.—MIN
MIC cont.—-MAX
Fig. 3-1, but
LINE IN >MIC
4. MIC input
level
LINE cont.—
spec. position
(Item 1-2)
MIC cont.—MIN
OSCILLOSCOPE
OSCILLATOR piSTORTION ANALYZER
i
or)
ne
AC Voltmeter
IkHz FILTER $2
tL] DECK oe? ca
Lt under TEST 7
T-1772
R
LINE iN OUTPUT
ATTENUATOR
Fig. 3-1 Basic connection
400 Hz/—22 dB
400 Hz/—12 dB
400 Hz/—12 dB
(195 mv)
400 Hz/ —12 dB
(195 mV)
400 Hz/
—70 dB +2 dB
(195 uv ~
308 pV)
In general, adjustments and checks are done in the order of
L-ch then R-ch. Double REF. Nos. indicate L-ch/R-ch.
(Example: R371/R372)
The value of “dB” refers to 0 dB (0.775 V). If an AC voltmeter
calibrated to 0 dB (1 V) is to be used, appropriate compensa-
tion should be made.
The AC voltmeter used in the procedures must have an input
impedance of 1 M-ohms or more.
When ordering test tapes, allow for the longer delivery time
that is required for them.
R369(L) —8 dB(308 mV) | LINE min. input
LINE cont.
LINE spec.
input level (L)
LINE spec.
R370 (R) input level (R)
R403/R404 —5 dB(436 mV)
R371/R372 oVvuU
on VU meter
400 Hz/—60 dB
(0.775 mV)
IMPORTANT: Do not
disturb these cont’s
during later checks.
OSCILLOSCOPE
OSCILLATOR
AC Voltmeter
‘ DECK
under TEST
Fig. 3-2. Connection
T1428