Panasonic RS-B25 - Mechanism Control Signals; System Control Terminals; Key Input Terminals

Terminal
on Symbol Name Function/operation
5. Osc Clock Oscillation * Clock oscillation of about 120kHz.
Note: Do not connect anything to this terminal during other
measurement because. it will be otherwise affected by the
probe.
3V
Approx. 9usec.
6. PEo Audio Muting
PE1 Motor Output
* Shifted from STOP to PLAY, “L” Approx. 0.7sec. after PLAY
command.
¢ Shifted from PAUSE to PLAY, “L” Approx. 0.5sec. after PLAY
command.
¢ Shifted from STOP to REC PAUSE, “‘L” Approx. 0.5sec. after REC
command.
° Shifted from MS to PLAY, “L” Approx. 0.8sec.. after PLAY
command.
Play Command Stop/ff/Rew/Piay Pause Command
+5V H H
Approx. 0.7sec.
¢“H” in STOP mode, ‘“‘L’” in other modes.
8. PE2 FF/REW Plunger «“L” for a short time during FF/REW/MS changeover.
Output (1) STOP > FF > STOP
FF Command Stop Command
+5V H
Approx.
Approx. | | 0.3sec. Approx.
0.05sec.
0.18sec.
OV
Stop Mode FF Mode
(2) STOP > REW > STOP
Rew Command Stop Command
+5V
Approx.
0.05sec.
OV
Stop Mode Rew Mode L
(3) PLAY > MS (FF) > PLAY/STOP
FF Command Play/Stop Command
Approx.
0.05sec.
Play Mode L MS Mode L.
(4) PLAY > MS (REW) > PLAY/STOP
Rew Command Play/Stop Command
Approx.
0.05sec.
Play Mode L MS Mode L
No Symbol Name Function/operation
9: PE3 PLAY Plunger ¢“L” for a short time during PLAY/REC PLAY/MS changeover.
Output (1) STOP > PLAY ~ STOP/PAUSE
Play Command Stop/Pause Command
+5V
Approx.
0.05sec.
OV
Stop Mode Play Mode L Stop Mode
(2) PAUSE/REC PAUSE ~ PLAY/REC PLAY
Play Command
Pause Mode L Play/Rec Play Mode
(3) MS (FF/REW) > PLAY
Play Command
MS Mode Play Mode
(4) MS (FF/REW) > STOP
Stop Command
+5V
Approx.
0.05sec.
ov
MS Mode Le Stop Mode
10. TEST TEST ¢ Connection to GND.
11. Vss — * Connection to GND.
12.
INT
Reel
Table
Pulse
¢
Rotation
of
reel
table
(with
ring,
magnet)
is
detected
by
Hall
IC
Input (DN6838-S) to judge the tape end.
¢ Rectangular wave input in PLAY, FF, REW, MS.
13. “RST Reset Terminal ¢ Used to reset the microcomputer when power is thrown in.
¢ Reset at “‘L’’ level (0.3 volt or less).
14. Vpp Power Supply ¢ Operative on 5.2 volts.
Terminal
15. PA¢ Key Input * Input of REW, Timer REC, MS, FF/REW switch.
REW (S706) |] * The above-mentioned inputs are read in accordance with PCé,
TIMER ($1) PC1, PC2, PC3 scanning.
16. PA1 ey Input ¢ Input of FF, Timer PLAY, switch.
FF (S707) || © The above-mentioned inputs are read in accordance with PC},
TIMER ($1) PC1, PC2 scanning.
PLAY (S901)
—ti—
Terminal
No.
22.