Sharp PC-1211 Service Manual page 24

24
Cassette operation ON/OFF control must be properly executed when the above signals are observed
during the execution of program.
Deactivation of the relay
(cassette tape to stop)
n . . . . . . . . . _ ___.n . . . . . . . __
#10 pin of TC4528 and
--Jl+---
#3 terminal of the relay ~
L
1 msec, min
-----,
n n
rt_
#6 pin of TC4528 and ~ 1msec, min
#5 terminal of the relay
_J
L__
--~,
Activation of the relay
(cassette tape to start running)
#5 and 12 pins of
TC4528BP (or equivalent)
•In display~ .
.,,4
.,14
In .
~4 ·
..j4
In
~---.j+
~~cording
recording In display recording In display recording In display
L
No. Read in
Display
Remarks
1 RUN
RUN_
RUN
No need of running the tape recorder.
2
IENTE~--
RUN
Recording sound is audible.
3
RUN
Recording sound goes out and "1 O." is displayed on
the display for a period of about 1 second.
4
- RUN
[Cautions]
1. Check the machine with the check procedure provided separately, if the cassette tape happens to
keep running at Step 3, the cassette tape fails to run at Step 5, or the cassette tape fails to stop
at Step 6.
2. Check the recording circuit of the CE121 if no recording sound is audible at Step 5.
3. In case no reproducing sound is audible at Step 10, proceed to playback another recorded tape to
check if reproducing sound is audible with that tape.
If reproducing sound is not audible with
that tape, proceed to check the reproducing circuit of the CE121 as it may be not functioning
properly. If the reproducing sound is audible with the second tape, check the recording circuit
of the CE 121 as no proper recording may not have been carried out.