Teac X-1000M - Electrical Adjustments and Checks; Monitor Performance

X1000M/X-1000
3 ELECTRICAL ADJUSTMENTS AND CHECKS
NOTES:
1. Before performing adjustments and checks, clean and demag-
netize the entire tape path.
2. Check that the deck is properly set for the voltage in your lo-
cality.
3. In general, adjustments and checks are done in the order of L-ch
then R-ch. Double REF. Nos. indicate L-ch/R-ch.
3-1 MONITOR PERFORMANCE
(Example: R371/R372)
. The value of “dB” refers to OdB (0.775V). If an AC voltmeter
calibrated to 0dB (1V) is to be used, appropriate compensation
should be made.
. The AC voltmeter used in the procedures must have an input
impedance of 1M-ohms or more,
MODE/
CONNECTION INSTRUCTION
SIGNAL
SOURCE
ADJUST
(or CHECK)
RESULT
REMARKS
1. Monitor
level
DBX sw—OUT
{Leave OUT up to
step 27, “DBX PER-
OSC + ATT to
LINE IN (L)
400H2/—22dB
(61.5mV)
—8dB (308mV)
LINE min. input
level (L)
AC voltmeter to
REC AND PLAY
AMPL. PCB term.
FORMANCE”
section).
MON!TOR—SOURCE
2. Output 2-1
level
3. VU meter 3-1
4, MIC input
level
#14, MIC ATT—O
OUTPUT cont.—CAL
LINE cont.-MAX
MIC cont.—MIN
" LINE spec.
LINE IN (L) > input level condition
LINE (N (R}
#14 #17
Fig. 3-1
LINE spec.
input level condition
Fig. 3-1 LINE spec. 400Hz/—12dB
input level condition | (195mV)
LINE cont.—MIN
MIC cont.—MAX
Fig.’3-1, but
LINE IN > MIC
MIC cont.—in the
above set position
MIC ATT—20
OSCILLATOR
ATTENUATOR
DISTORTION ANALYZER
DECK
under TEST
LINE cont.—spec.
position (Item 1-2)
MIC cont.—MIN
| MIC ATT—O
OSCILLOSCOPE
AC VOLTMETER
1KHz FILTER
400Hz/—12dB
(195mvV)
”
400Hz/—12dB
(195mV)
400Hz/—70d0B
400Hz/—60dB
(0.775mV)
OSCILLATOR
R403/R404
R371/R372
LINE IN
—5dB (436mvV)
Ovu
on VU meter
—5dB (436mvV)
—25dB +1dB
(38.8mV ~
LINE spec.
input level (R)
MIC min. input level
IMPORTANT: Do not
disturb these cont’s
during later checks.
OSCILLOSCOPE
OUTPUT
LINE IN
OUTPUT
Fig. 3-1 Basic connection
10
Fig. 3-2 Connection for phase check
0° (IN PHASE) 45° 90° 180
2 f
Fig. 3-3 Confirming phase reiationship