14
MAINTENANCE
CLEANING THE TAPE HEADS AND MECHANICAL PARTS
Dirt on the heads will impair the sound qualify of both
recording and play back.
Dust or magnetised particles attached to the capstan or pinch
roller are the direct cause of uneven tape speed during
recording and playback. This is the cause of "wow" and
"flutter", namely tape speed variations below and above
normal speed, respectively.
Clean the heads and mechanical parts frequently to remove
dust and tape residue.
1 Press the buttons of Deck 1 and Deck 2
in order to open the cassette compartments. Remove the
cassette tapes in the compartments.
2 Press the buttons of Deck 1 and Deck 2.
3 Wipe the parts with a soft lint-free cloth or cotton swab
that has been partially soaked in alcohol methylated
spirit), until the heads are free of all dirt and residue
deposits.
DEMAGNETISING THE HEADS
CLEANING THE CABINET (Use only a damp cloth for cleaning the cabinet.)
15
SPECIFICATIONS
Power source: AC 110V - 127V and 220 - 240V,
50/60Hz
DC 15V (UM/SUM-1 or R20 type x 10,
or external 15V DC)
Output power: PMPO; 52W (26W + 26W) (AC opera-
tion)
MPO; 40W (20W + 20W) (AC opera-
tion)
RMS; 26W(13W + 13W) (DC opera-
tion, 10% distortion)
Dimensions: Width; 681 mm (26-13/16")
Height; 225 mm (8-7/8")
Depth; 210 mm (8-1/4")
Weight: 8.8kg(19.4lbs.) without batteries
TAPE RECORDER
Tape: Compact cassette tape
Frequency response: 30Hz — 14,000Hz (normal tape)
30Hz - 16,000Hz (CrO
2
tape)
30Hz - 17,000Hz (metal tape)
Signal/noise ratio: 55 dB (Deck 1, playback)
50 dB (Deck 2, recording)
Input impedance: External mic; 600 ohms
Phono/line in; 50 kohms/50 kohms
Loaded impedance: Headphones; 8 ohms —32 ohms
External speakers; 8 ohme — 16 ohms
Line out; 0.6V/50 kohms
RADIO
Frequency range: AM; 526.5 kHz - 1606.5 kHz
SW1 2.3 MHz - 7.3 MHz
SW2 7.3 MHz - 22 MHz
FM; 87.6 MHz - 108 MHz
SPEAKER
Speakers: 16 cm (6-1/2") free-edge woofer x 2
tweeter x 2
Impedance: 8 ohms
Input: 26W (maximum)
The manufacturer reserves the right to vary specifications,
design, or use alternative materials as may be deemed neces-
sary or desirable at any time, any such changes or variations
being of a kind as not reduce the quality, performance or
appearance.
21
When the head is used for a long time, it is sometimes
magnetised to a certain degree. Furthermore, it is also
magnetised when magnetised metals, such as screwdrivers,
etc. are brought near the head. As a result, treble deterio-
rates, a static noise is recorded and noise is introduced into
important music tapes.
Sometimes use a head demagnetiser sold on the market and
demagnetise the head according to the instructions supplied
with head demagnetiser.
Capstan
Record/playback
head
Capstan
Pinch roller
Erase
head
Playback head Pinch roller
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