Ic Pin Function Description - Sony TC-KB920S Service Manual

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5-13. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC801 M38172M4-171FP (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
1 T.REEL I Take-up reel rotation pulse input from the rotation detect sensor (IC82)
2 S.REEL I Supply reel rotation pulse input from the rotation detect sensor (IC81)
3 METER.LCH I Signal input for the level meter drive (L-ch)
4 METER.RCH I Signal input for the level meter drive (R-ch)
5 AMS.IN I Auto music sensor signal input terminal "H": AMS detect
6 DOOR/STOP.SW I Mechanism stop detect switch (S81) input terminal
7 CLOSE.SW I Not used (fixed at "H")
8 OPEN.SW I Not used (fixed at "H")
9 CAM.SW3 I Not used (fixed at "H")
10 CAM.SW2 I Not used (fixed at "H")
11 CAM.SW1 I Not used (fixed at "H")
12 CAM.SW0 I Not used (fixed at "H")
13 CAP.M ON/OFF O Capstan motor (M902) on/off control signal output terminal "H": motor on
14 ASIST.M.UP O Assist motor drive signal output terminal Not used (pull down)
15 ASIST.M.DOWN O Assist motor drive signal output terminal Not used (pull down)
16 REEL.M.FWD O Reel motor (M901) drive signal output to the BA6219B (IC803)
17 REEL.M.REV O Reel motor (M901) drive signal output to the BA6219B (IC803)
18 EJECT.V (6.5V) O Reel motor (M901) eject control signal output terminal "H" active
19 FF/REW.V (4.4V) O Reel motor (M901) FF/REW control signal output terminal "H" active
20 PLAY.V (2.5V) O Reel motor (M901) play control signal output terminal "H" active
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21 TYPE.IV I Metal detect switch (S83) input terminal "H": metal
22 HALF.SW I Half detect switch input terminal Not used (fixed at "H")
23 TYPE.II I CrO detect switch (S82) input terminal "H": CrO
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24 TAB.SW I Not used (fixed at "H")
25 POWER.IN I AC in detect signal input terminal "H": AC in
26 SIRCS.IN I Sircs signal input from the remote control receiver (IC901)
System reset signal input from the reset signal generator (IC804) "L": reset
27 RESET I
"L" is input for several 100 msec after power on, then it changes to "H"
28 XCIN I Sub system clock input terminal Not used (fixed at "L")
29 XCOUT O Sub system clock output terminal Not used (open)
30 XIN I Main system clock input terminal (4 MHz)
31 XOUT O Main system clock output terminal (4 MHz)
32 VSS — Ground terminal
33 VER.200/190 I Setting terminal for the version (fixed at "L")
34 POWER.OUT O Power on/off control signal output terminal "L": power on Not used (open)
MONITOR.TAPE/
35 O Audio monitor selection signal output terminal "H": tape monitor, "L": source monitor
SOURCE
37 OSC H/L O Calibration tone frequency high/low control signal output terminal "L": frequency low
38 CAL.ON/OFF O Calibration tone on/off control signal output terminal "H": on, "L": off
Record muting on/off control signal output to the CXA1598S (IC303)
39 REC.M.ON/OFF O
"L": record muting on
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40 BIAS.ON/OFF O Recording bias on/off control signal output terminal "H": bias on
Dolby B/C type or dolby on/off selection signal output to the CXA1563S (IC302, 307)
41 DOL.CON O
"H": dolby C type, "L": dolby off (center voltage: dolby B type)
Metal on/off control signal output or segment drive signal output to the fluorescent indicator
42 SEG.IV O
tube (VFD901) (for TYPE IV light up)
Function
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Pin No. Pin Name I/O
43 SEG.DOL.C O
44 SEG.DOL.B O
45 SEG.PROPER O
46 SEG.FIL.ON/OFF O
SEG.DOL.S.
47 O
ON/OFF
48 NC O
49 SEG01 O
50 SEG02 O
51 SEG06 O
52 SEG07 O
53 SEG03 O
54 SEG05 O
55 SEG04 O
56 SEG08 O
Q Q 57 SEG16 O
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58 SEG09 O
59 SEG10 O
60 SEG14 O
61 SEG15 O
62 SEG11 O
63 SEG13 O
64 SEG12 O
65 SEG.CAL O
66 SEG.I O
67 SEG.II O
68 G5-DISPLAY O
69 G4-SEC O
70 G3-MIN O
71 G2-RCH O
72 G1-LCH O
73 VCC —
74 VEE —
75 AVSS —
76 VREF I
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78 KEY1 I
79 TIMER.SW I
80 DOLBY.SW I
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Function
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for DOLBY NR C light up)
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for DOLBY NR B light up)
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for TYPE I, II light up)
Multiplex filter on/off control signal output or segment drive signal output to the fluorescent
indicator tube (VFD901) (for FILTER light up) "H": multiplex filter on
Dolby S type on/off selection signal output to the CXA1563S (IC302, 307) or segment drive
signal output to the fluorescent indicator tube (VFD901) (for DOLBY NR S light up)
"L": dolby S on
Not used (open)
Segment drive signal output to the fluorescent indicator tube (VFD901)
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Segment drive signal output to the fluorescent indicator tube (VFD901) (for CAL light up)
Recording equalizer type I select signal output or segment drive signal output to the
fluorescent indicator tube (VFD901) (for TYPE I light up)
Recording equalizer type II select signal output or segment drive signal output to the
fluorescent indicator tube (VFD901) (for TYPE II light up)
Grid drive signal output to the fluorescent indicator tube (VFD901)
Power supply terminal (+5V)
Power supply terminal (–24V)
Ground terminal (for A/D converter)
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Reference voltage (+5V) input terminal
Key input terminal (A/D input) (S906 to S909)
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·, P PAUSE, MEMORY, RESET keys input
Key input terminal (A/D input) (S901 to S905)
p, AMS 0, AMS ), r REC, R REC MUTING keys input
Half detect switch (S86) input terminal
DOLBY NR switch (S913) input terminal (A/D input)
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