Sharp RT-207H Serviceanleitung Seite 6

RT-207H(S)
• Deck 1 playback system
When the Deck 1 is in playback mode, the signal from
the playback head is applied via the analog switch
(IC506) to the Dolby NR circuit (IC507, IC508). Then
the signal is sent to the analog switch
out of the line output terminal.
When the unit is in the mixing dubbing mode, the signal
from the playback head is amplified in the line amplifier
(0507, Q508) and is sent to the analog switch (IC509)
to go out of the line output
• Deck 2 playback system
When the Deck 2 is in playback mode, the signal from
the record/playback head is amplified
equalizer amplifier (IC504) and is applied via the analog
switch (IC5Q6) to the Dolby NR circuit (IC507, IC508).
Then the signal is sent to the analog switch
to go out of the line output
Note : When both Deck
playback mode,
preference to the latter's.
• Recording system
When the unit is in record mode, the signal from the
line input terminal is applied via the record level con-
trol (VR514) and analog switch
NR circuit (IC507, IC508). Then the signal is sent to
the record equalizer
record/playback head.
When the unit is in the normal speed or high speed dub-
bing mode, the analog
Deck 1 playback equalizer amplifier (IC501 ) so that the
signal from the Deck 1 is allowed to be recorded on the
Deck 2.
• Tape mechanism controller
The tape mechanism
microcomputer (IC513)
(IC514), and it offers various controls on the tape run-
ning, Sinal muting, switch operation, tape selection and
APSS operation, etc.
THE MICROCOMPUTER
TIONS LISTED BELOW.
1. To control the tape mechanical
2. To put the mechanism in a stop instantly when the
power switch is turned
3. To read out the information
key and cause the corresponding
4. To control the audio signals of the Deck 1 and Deck
2.
To control APMS operation,
5.
continuous playback and repeat playback.
6. To control the normal speed/high speed dubbing and
mixing dubbing.
7. To turn on or off the Dolby NR circuit.
8.
To control an automatic
9. To read out the information
control unit to allow
ternal record player onto the unit.
10. To put the tape mechanism in a stop when a power
failure occurs.
CIRCUIT
(IC509) to go
terminal.
in the playback
(IC509)
terminal.
1 and Deck 2 are put
the former's signal
(IC506) to the Dolby
amplifier (IC51 1) to enter
switch (IC506) activates
controller mainly consists
and input/output expander
(IC513) OFFERS THE FUNC-
functions.
on.
data from the operation
LED to light up.
introduction playback,
selection,of the tape in use.
data from the remote
recording the sound of an ex-
DESCRIPTION
Deck 2 playback Dl/D2
(Side A)/Deck 1 MOTOR
playback
Dl/D2
Dl/D2
Fast forward Dl /D2 REEL
MOTOR
Dl/D2
Dl/D2
Dl/D2
Playback —
APSS MOTOR
Dl/D2
Dl/D2
in
Dl/D2
has
MOTOR
Playback — Dl/D2
Stop MOTOR
Dl /D2
Dl/D2
Rewind Dl/D2
MOTOR
the
Dl/D2
Dl/D2
the
There are six major functions available with the RT-207H/E
of
as shown above. These functions
tape mechanism controller so that each of them is imple-
mented independently
combination to provide the RT-207H/E with its all other
necessary functions.
FUNCTIONS OF
(IC513 AND IC514)
The RT-207H/E is provided with a microcomputer
and an input/output
a tape mechanism controller to offer all the necessary func-
tions of the tape deck. The input/output
to expand the input/output
ter, and the former's functions all depend upon the latter's
instruction.
CAPSTAN
SOL
MUT
H/L
RES
FF
Figure 8— 1
CAPSTAN
SOL
MUT
REEL
HIL
CAPSTAN
SOL
MUT
REEL
H/L
REW
FF
Figure 8 —2
are controlled
or some of them are performed in
TAPE MECHANISM CONTROLLER
expander (IC51 4), both of which form
expander is used
capacity of the microcompu-
by the
(IC513)