Teac C-3X Service Manual

MEASURING
ApJust | POINT:
ITEM SETTING INPUT SIGNAL ieee REMARKS
RESULT
LINE IN:
BIAS, EQ: METAL OUTPUT:
Tape: METAL perepetirad Rie/A26 8 dB (308 mV}
LINE IN
BIAS, EQ: Co(Cr0.) OUTPUT:
14, Record level Pee MELeDOT a0 He/-12 48 R17/R27 Be AB aOR TV)
LINE IN:
BIAS, EQ: NORMAL OUTPUT:
Tape: MTT-501 (po Het 12 OB Rig/n2e —8 dB (308 mv)
cn "Required signal/ Check QUTRUT:
BIAS, EQ: METAL Be ee te Fig. 5-10
LINE IN:
BIAS, EQ: Co(CrO2) IN ouTPUT:
15, Frequency 7 Required signal/ Check a
response Tepe: MIT-S08? —42 dB (6.15 mV) Fig. 6:10
LINE IN
: NORMAL INE ouTPUT:
aera Required signal/ Check Feeaa
—42 dB (6.15 mV)
If frequency response is out of specification, reche ck #13, “Record bias”.
16. Total harmonic _| Same as above, but with LINEN side aa ouTPuT:
distortion STANDARD tape only percent 2% or less distortion
SPEED:
STANDARDand
[UNE
IN
augur
HIGH ix
: (275 mv) Check 48 dB min. (STD)
BIAS, EQ: METAL 1 49 dB min. (HI)
Tape: METAL Ac ser
17. Signal-to-noise y 1 kHz/—9 dB OUTPUT: Ratio of spec-
ratio trina eee tee (275 mv) Check 48 dB min. (STD) | ified output of
if 4 49 dB min. (HI) 5 dB to noise
no signal
‘ 1 kHz/—9 dB output:
Pee MEE (275 mv) Check 45 dB min. (STD)
7 + 46 dB min. (HI)
no signal
© Connection is same as in Fig. 5-1, but engage 1-kHz filter.
© Record a 1-kHz signal. Rewind tape to midpoint of recorded portion.
Record a ‘no signal” portion, Find the difference between the 1-kHz portion
and the “no-signal’’ portion.
18, Erase efficiency TINEING
BIAS, EQ: METAL eee eke ourTpur: Ret output
Tape: METAL . +: 65 dB min. ratio 45 dB (1.38V)
no signal
Connection: Fig, 5-1, but engage 1-kHz filter.
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.
19, REC MUTE
function LINE IN:
BIAS, EQ: Co(CrO,) a Ghedie OUTPUT: Ret: cutout
Tape: MTT-506! baa 65 dB min. ratio eee i aavy
no signal
20. Channel separation
filter.
Connection: Fig. 5-1, but do not connect LINE IN (R), and engage 1
Set the deck to record mode. Find the difference between the 1-kHz
recorded portion (L-ch) and the “no signal’ portion (R-ch).
“kHz
BIAS, EQ: Co(CrO2)
‘Tape: MTT-5061
LINE IN:
Lich 1 kHz/-9 dB
(275 mV)
Rech No signal
Check
OUTPUT:
35 dB min. ratio
C-3X.
1

Teac C-3X Specifications

General

Brand	Teac
Model	C-3X
Category	Cassette Player
Language	English