Sony TC-KB920S - IC Pin Function Descriptions; Main Board IC Pinouts

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5-13. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC801 M38172M4-171FP (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
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
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
2 detect switch (S82) input terminal “H”: CrO 2
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)
27 RESET I
System reset signal input from the reset signal generator (IC804) “L”: reset
“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)
35
MONITOR.TAPE/
SOURCE
O Audio monitor selection signal output terminal “H”: tape monitor, “L”: source monitor
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
39 REC.M.ON/OFF O
Record muting on/off control signal output to the CXA1598S (IC303)
“L”: record muting on
40 BIAS.ON/OFF O Recording bias on/off control signal output terminal “H”: bias on
41 DOL.CON O
Dolby B/C type or dolby on/off selection signal output to the CXA1563S (IC302, 307)
“H”: dolby C type, “L”: dolby off (center voltage: dolby B type)
42 SEG.IV O
Metal on/off control signal output or segment drive signal output to the fluorescent indicator
tube (VFD901) (for TYPE IV light up)
Pin No. Pin Name I/O Function
43 SEG.DOL.C O
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for DOLBY NR C light up)
44 SEG.DOL.B O
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for DOLBY NR B light up)
45 SEG.PROPER O
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for TYPE I, II light up)
46 SEG.FIL.ON/OFF O
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
47
SEG.DOL.S.
ON/OFF
O
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
48 NC O Not used (open)
49 SEG01 O
50 SEG02 O
51 SEG06 O
52 SEG07 O
53 SEG03 O
54 SEG05 O
55 SEG04 O
56 SEG08 O
57 SEG16 O
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 Segment drive signal output to the fluorescent indicator tube (VFD901) (for CAL light up)
66 SEG.I O
Recording equalizer type I select signal output or segment drive signal output to the
fluorescent indicator tube (VFD901) (for TYPE I light up)
67 SEG.II O
Recording equalizer type II select signal output or segment drive signal output to the
fluorescent indicator tube (VFD901) (for TYPE II light up)
68 G5-DISPLAY O
69 G4-SEC O
70 G3-MIN O Grid drive signal output to the fluorescent indicator tube (VFD901)
71 G2-RCH O
72 G1-LCH O
73 VCC — Power supply terminal (+5V)
74 VEE — Power supply terminal (–24V)
75 AVSS — Ground terminal (for A/D converter)
76 VREF I Reference voltage (+5V) input terminal
77 KEY2 I
Key input terminal (A/D input) (S906 to S909)
·, P PAUSE, MEMORY, RESET keys input
78 KEY1 I
Key input terminal (A/D input) (S901 to S905)
p, AMS 0, AMS ), r REC, R REC MUTING keys input
79 TIMER.SW I Half detect switch (S86) input terminal
80 DOLBY.SW I DOLBY NR switch (S913) input terminal (A/D input)
Segment drive signal output to the fluorescent indicator tube (VFD901)