Teac C 3X Service Manual

Page 2

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1 SPECIFICATIONS AND SERVICE DATA

NOTES:

1. Improvements may result in changes in specifications and service

data.

2. 0 dB is referenced to 0.775 V in this manual unless otherwise

specified.

3. All the electrical numeral values are for STANDARD speed

unless otherwise specified.

SPECIFICATIONS

Track System 4-track, 2-channel stereo
Heads 3: Erase, record and playback
Type of Tape Cassette tape, (2-60 and C-90 (Philips type)
Tape Speed 4.75 cm/s (1-7/8 ips), 9.5 cm/s (3-3/4 ips)
Input (level and impedance)
MIC: Specified input level: -57 dB (1.09 mV)/10k ohms
Minimum input level: -67 dB (346 uV)
LINE IN: Specified input level: -9 dB (275 mV)/50k ohms
Minimum input level: -19 dB (36.9 mV)
Output (level and impedance)
OUTPUT: Maximum output level: -2.5 dB (581 mV)/50k ohms
Specified output level: -5 dB (436 mV)
PHONES: Specified output level: -15.8 dB (126 mV)/8 ohms
Equalization

HIGH STANDARD
METAL 3180 ps+35ps 3180us+70 us
Co(CrD;) 3180 ps+ 35 us 3180 its + 70 MS
NORMAL 3180us+50us 3180us+120ps

Head Configuration
Ill-track, l-channel erase head
1/4-track, 2-channel record head and playback head in a single
housing
Motors 1 DC servo capstan motor
1 DC reel motor
Bias Frequency 100 kHz :5 kHz
Operation Position Horizontal
Power Requirements
100/117/220/240 V AC, 50/60 Hz,41 W(General export model)
117 V AC, 60 Hz,41W(U.S.A/Canada model)
220 V AC, 50 Hz,41W(Europe model)
240 V AC, 50 Hz,41W(U.K./Australia model)
Weight 9 kg (193/16 lbs.) net
Dimensions See Fig. 3-2

* Noise Reduction System and Headroom Extension System

manufactured under license from Dolby Laboratories Licensing
Corporation.
Dolby' and the double-D symbol are trademarks of Dolby

Laboratories Licensing Corporation.

SERVICE DATA

MECHANICAL

Tape Speed Deviation 3,000 Hz :45 Hz
Tape Speed Drift 30 Hz

Wow and Flutter

HIGH STANDARD
Playback 0.065% (WRMS) [1.08% (WRMSI
Record/playback 0.18% (RMS) 0.25% (RMSI

Pinch Roller Pressure 390 g to 490 g (13.8 oz to 17.3 oz.)
Reel Torque (at STANDARD speed)
Take-up: 45 to 65 g-cm (0.625 to 0.903 oz-inch)
Supply: 3 to 8 g-cm (0.0417 to 0.111 oz-inch)
F.F. & REW: 90 to 160 g-cm (1.25 to 2.22 oz-inch)
Fast Winding Time
90 seconds for MTT-501 (El-60)

ELECTRICAL

Frequency Response
See Figs. 5-9 to 543.
Signal-to-nuise Ratio

Playback Better than:
HIGH STANDARD
METAL, Co(Cr02) 55 dB 52 dB
NORMAL 53 dB 48 dB
Overall Better than:
HIGH STANDARD
METAL, Co(Cr01) 49 dB 48 dB
NORMAL 46 dB 45 dB

SIN is improved by 5 dB at 1 kHz and 10 dB above 5 kHz when
Dolby NR* is used.

Erase Efficiency 65 dB min. at 1 kHz (measured with input 10 dB

higher than the specified input level)

Channel Separation 35 dB min. at 1 kHz

Adjacent Track Crosstalk 40 dB min. at 125 Hz

Total Harmonic Distortion 2.0% or less with NORMAL, Co(Cr02)

and METAL tapes

dbx noise reduction system made under license from dbx, Incorpo-
rated. The wurd dim and the Symbol are trademarks of dbx,
Incorporated.

CAUTION

must always be replaced with identical components - refer to the
TEAC Parts List and ensure exact replacement.

AParts marked with this sign are safety critical components. They '

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