Double Cassette Deck
Effective : April, 1999
PC boards shown are viewed from parts side.
Parts marked with * require longer delivery time.
The parts with no reference number or no parts number in the
exploded views are not supplied.
As regards the resistors and capacitors, refer to the circuit diagrams
contained in this manual.
Parts marked with this sign are safety critical components. They
must be replaced with identical components - refer to the appropriate
parts list and ensure exact replacement.
Parts of [ ] mark can be used only with the version designated.
2 ADJUSTMENT AND CHECKS
3 EXPLODED VIEWS AND PARTS LIST
4 PC BOARDS AND PARTS LIST
4-track, 2-channel stereo
Deck ; 1 Erase and 1 Record/Playback
Deck ; 1 Erase and 1 Record/Playback
Type of Tape:
Cassette tape C-60 and C-90 (Philips
4.76 cm/sec (1-7/8 ips)
9.5 cm/sec (3-3/4 ips) (High speed
2 DC servo motors (1 ea. deck)
Wow and Flutter:
0.09 % (WRMS)
Frequency response (Overall, -20 dB):
2519,000 Hz, Metal tape
2518,000 Hz, CrO2 tape
2517,000 Hz, Normal tape
Signal-to-Noise Ratio (Overall):
59 dB (NR off, 3 % THD Level,
69 dB (Dolby B NR on, over 5 kHz)
79 dB (Dolby C NR on, over 1 kHz)
Fast Winding Time: Approximately 110 seconds for C-60
Line: 97 mV, 50 k ohms
Mic: 0.38 mV, 200 ohms
Line: 0.52 V for load impedance of 50 k
ohms or more
Headphones: 1 mW/8 ohms
Power Requirements: 120/230 V AC, 50-60 Hz
(General Export model)
120 V AC, 60 Hz
230 V AC, 50 Hz (Europe model)
240 V AC, 50 Hz (Australia model)
Power Consumption: 22 W
Dimensions (W x H x D):
435 x 127 x 292 mm
(17-1/8" x 4-15/16" x 11-1/2")
4.0 kg (8-13/16 lbs.)
Remote control unit (RC-615) x 1
model), Battery (SUM-3, "AA", "R6"
type) x 2 (General Export/Europe/UK/
Australia model), Input-output
connection cord x 1
Improvements may result in specification or feature changing
Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang &
"DOLBY", the double-D symbol
and "HX PRO" are
trademarks of Dolby Laboratories Licensing Corporation.
2 ADJUSTMENTS AND CHECKS
2-1 MECHANICAL ADJUSTMENT
2-1-1 Wow and flutter (playback method)
In both FWD and REV play modes, these measurements should
be made at the beginning, middle, and the end of the tape.
1. Connect a wow-and-flutter meter to the LINE OUT.
2. Load and play a TEAC MTT-111N test tape.
3. Check that the readings on the wow-and-flutter meter is
within 0.19% (JIS WTD).
2-1-2 Tape speed
1. Connect a frequency counter to the LINE OUT.
2. Load a TEAC MTT-111N test tape and play in FWD
direction the beginning of the test tape.
3. Adjust each variable resistor to get the following values.
4. In play mode, check that the following values are obtained at
the beginning and end of the tape.
Speed drifting: Within 120Hz (HIGH speed)
Within 60Hz (LOW speed)
2-1-3 Reel torque
1. Load the cassette torque meter on the deck and read the
pointer indication on the dial scale for each tape transport
operation. The measured torque should be within the
following specified values.
Take-up: 30 to 70g cm
Supply: 1.5 to 6g-cm
FF/REW: 70 to 150g-cm
MTT-8111W: Forward torque & back tension
MTT-8121W: Reverse torque & back tension
MTT-8242: Fast forward & rewind static torque
Short HIGH SPEED
Open LOW SPEED
2-2 ELECTRICAL ADJUSTMENT
Before performing adjustments and checks clean and
demagnetize the entire tape path.
In general, adjustments and checks are made in the order of
Lch then Rch. Double REF. Nos. indicate Lch/Rch.
0dB is referenced to 0.775V.
The AC voltmeter used in the procedures must have an input
impedance of 1M
Unless specified otherwise, adjustments and checks are made
in FWD direction.
2-2-2 Adjustment locations
REC AMP PCB
2-2-3 Playback performance
TEAC test tapes:
MTT-150C : For Dolby level calibration
DOLBY NR Switch: OFF
MTT-25702 : For playback frequency response check NORMAL tape
MTT-5513 : For S/N check NORMAL tape
2. DOLBY level
4. Meter level