Ic Pin Function Description - Sony TC-KB820S Service Manual

5-12. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC801 CXP82612-022Q (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
1 STOP SW I Mechanism stop detect switch (S81) input terminal
2 SIRCS IN I Sircs signal input from the remote control receiver (IC901)
3 VERSION2 I Setting terminal for the version (fixed at "L")
4 to 6 NC O Not used (open)
7 MPX ON/OFF O Multiplex filter on/off control signal output terminal "H": multiplex filter on
8 CAL ON/OFF O Calibration on/off control signal output terminal "H": calibration on
9 REC CAL 0 O
Recording calibration up/down control signal output to the CXA1579P (IC502)
"H": up, "L": down (high impedance: off)
10 REC CAL 1 O
11 GP CAL 0 O
Equalizer calibration up/down control signal output to the CXA1579P (IC502)
"H": up, "L": down (high impedance: off)
12 GP CAL 1 O
13 LINE MUTE O Line muting on/off control signal output terminal "L": line muting on
14 AMS IN I Auto music sensor signal input terminal "H": AMS detect
15 NC O Not used (open)
16 REC MUTE O Record muting on/off control signal output to the CXA1579P (IC502) "H": record muting on
17 REEL – O
Reel motor (M901) drive signal output terminal
18 REEL + O
19 BIAS O Recording bias on/off control signal output terminal "H": bias on
Relay drive signal output for the record/playback selection relay
20 RELAY O
"L": playback mode, "H": recording mode
21 CAL KEY I AUTO CAL switch (S921) input terminal
22 METER L I Signal input for the level meter drive (L-ch)
Key input terminal (A/D input) (S901 to S904) p, AMS 0, AMS ), r REC keys input
23 KEY X I
Key input terminal (A/D input) (S905 to S909)
24 KEY Y I
R REC MUTING, ·, P PAUSE, MEMORY, RESET keys input
25 METER R I Signal input for the level meter drive (R-ch)
26 DOLBY AD I DOLBY NR switch (S922) input terminal (A/D input)
27 HALF I Half detect switch (S86) input terminal
28 METAL CHROM I Metal detect switch (S83) and CrO
29 S.REEL I Supply reel rotation pulse input from the rotation detect sensor (IC81)
System reset signal input from the reset signal generator (IC802) "L": reset
30 RESET I
"L" is input for several 100 msec after power on, then it changes to "H"
31 XO O System clock output terminal (6 MHz)
32 XI I System clock input terminal (6 MHz)
33 VSS — Ground terminal
34 BIAS CAL 0 O
35 BIAS CAL 1 O
Equalizer bias calibration control signal output terminal
36 BIAS CAL 2 O
37 BIAS CAL 3 O
38 CAP.M ON/OFF O Capstan motor (M902) on/off control signal output terminal "H": motor on
39 OSC H/L O Calibration tone frequency high/low control signal output terminal "L": frequency high
40 OSC ON/OFF O Calibration tone on/off control signal output terminal "H": off, "L": on
Dolby B and C type or dolby S type selection signal output to the CXA1563S (IC501)
41 BC/S O
"H": dolby B and C type, "L": dolby S type
Dolby B type or dolby C type selection signal output to the CXA1563S (IC501)
42 DOLCON O
"H": dolby C type, "L": dolby off (high impedance: dolby B type)
Function
detect switch (S82) input terminal "H": metal or CrO
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Pin No. Pin Name I/O
Recording/playback control signal output to the CXA1563S (IC501)
43 REC/PB O
"L": recording mode, "H": playback mode
44, 45 NC O Not used (open)
46 to 61 S1 to S16 O Segment drive signal output to the fluorescent indicator tube (FL901)
62 S18 O Segment drive signal output to the fluorescent indicator tube (FL901)
63 to 65 NC O Not used (open)
66 to 70 G5 to G1 O Grid drive signal output to the fluorescent indicator tube (FL901)
71 V-DISP — Power supply terminal for the fluorescent indicator tube drive (–20V)
72 VDD — Power supply terminal (+5V)
73, 74 NC O Not used (open)
75 VDD — Power supply terminal (+5V)
76 POWER IN I AC in detect signal input terminal "H": AC in
77 POWER OUT O Power on/off control signal output terminal "L": power on Not used (open)
78 VDD — Power supply terminal (+5V)
79 TEST MODE I Setting terminal for the test mode "L": test mode (Normally: fixed at "H")
80 VERSION1 I Setting terminal for the version (fixed at "L")
2
Function
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