Sony BM-87DST Marketing, Service Manual

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Pin No. Pin name I/O Description
1 – 12 S12 – S23 – Not used (OPEN).
13 – 16 KOUT 0 – KOUT 3 O Key scan output.
17 MA50 - OUT – Not used (OPEN).
18 – – Not used (OPEN).
19 4.8 / 2.4 - OUT O Tape speed change signal output.
20 – – Not used (OPEN).
21– 23 COM0 – COM2 – Not used (OPEN).
24 – – Not used (OPEN).
25 LCD - BIAS – Conect to VSS.
26 – 28 VLCD0 – VLCD2 – Conect to VSS.
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29 FE-OUT O Fast-Erase control output. At Fast-Erase : “ L ” At the other : “ H ”
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30 BIAS-OUT O BIAS control output. At DICT, TEL-REC : 0V At the other : 5.9V
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31 BRK-PG-OUT O Brake plunger output. Normal : 6.0 V STOP from FF/REW :
FF/REW
STOP
60ms 0V
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32 STOP-PG-OUT O Stop plunger output. Normal : 0 V STOP from FWD :
FWD STOP
60ms
0V
33 VSS – GND
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34 FWD-PG-OUT O FWD plunger output. At FWD : “ H ” At the other : “ L ”
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35 FF-M-OUT O
FF/REW motor output.
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36 REW-M-OUT O
37 A-OFF-OUT O
Motor Auto-off output.
Motor Auto-off (no cassette or after three minutes after STOP) : “ H ” At the other : “ L ”
38 STAND-BY I POWER switch input. POWER switch ON : “ H ” POWER switch OFF : “ L ”
39 TAB-IN I
TAB (erase proof) detection switch input.
Cassette with TAB : “ L ” Cassette without TAB : “ H ”
40 MC-IN I Cassette detection switch input. With a cassette : “ L ” Without a cassette : “ H ”
41 CAS-IN I Cassette detection switch input. With a cassette : “ L ” Without a cassette : “ H ”
42 SR I S reel signal input.
43 TR I S reel signal input.
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44 DICT-IN I
HU-DICT key input.
At DICT key input of the hand control unit (HU-80) : “ L ” At the other : “ H ”
45 LTR-DET I
LTR signal input. Count the rectangular pulse with microcomputer
SECTION 6
DIAGRAMS
6-1. EXPLANATION OF IC TERMINALS
IC109
µ
PD75308GF-J16-3B9 (SYSTEM CONTROL)
At motor FF At motor REW At the other
Pin35 L H H
Pin36 H L H
LTR
At FF/REW 600 to 4,800HZ