6-5. Ic Pin Function Description - Sony XR-2800 Service Manual

6-5. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 µPD17707GC-529-3B9 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 ILLIN
2 POS3
3 POS2
4 POS0
5 POS1
6 TAPEON
7 CM ON
8 LM LOD
9 LM EJ
10 TUNON
11 FM ON
12 PW ON
13 MUT
14 VOLCE
15 VOLCKO
16 VOLSO
17 AMPON
18 AMPMUT
19 DX/LO
20 AM MONO
21 GND
22 DSTSEL
23 D-BASS
24 KEYIN1
25 KEYIN0
26 RC IN0
27 VSM
28 AMIFIN
29 FMIFIN
30 VDD2
31 FM OSC
32 AM OSC
33 GND
34 N.C.
35 EO1
36 TEST0
37 N.C.
38 SEKOUT
39 N.C.
40 BEEP
41 KEYACK
I/O
I Not used (fixed at "L")
I
I
Tape position detect input from tape operation switch on the mechanism block
I
I
O Tape system power supply on/off control signal output terminal "H": tape on
O Capstan/reel motor (M901) drive signal output terminal "H": motor on
Loading/tape operation motor control signal output to the MM1322XFBE (IC361)
O
(For the loading direction and forward side operation) *1
Loading/tape operation motor control signal output to the MM1322XFBE (IC361)
O
(For the eject direction and reverse side operation) *1
O Tuner system power supply on/off control signal output to the BA3918 (IC601) "H": tuner on
O FM system power supply on/off control signal output to the BA3918 (IC601) "H": FM on
O Main system power supply on/off control signal output to the BA3918 (IC601) "H": power on
O Line muting control signal output terminal "H": line muting on
O Chip enable signal output to the electrical volume (IC401)
O Serial data transfer clock signal output to the electrical volume (IC401)
O Serial data output to the electrical volume (IC401)
O Standby control signal output to the power amplifier (IC751) "L": standby
O Muting control signal output to the power amplifier (IC751) "L": muting on
O Local/DX selection signal output to the FM/AM tuner unit (TU1) "L": DX, "H": local
O AM forced monaural signal output terminal Not used (open)
— Ground terminal
I Destination setting terminal (XR-2800: fixed at "L", XR-2803: fixed at center voltage)
I D-BASS switch (SW970) input (A/D input)
Key input terminal (A/D input)
I
6, INTRO 1, REPEAT 2, 3, BL SKIP 6, ATA 5, METAL 4 keys input (LSW921 to LSW927)
Key input terminal (A/D input)
I OFF, SOURCE, MODE
VOLUME –, SEL, VOLUME +, ATT , DSPL, BTM, LCL keys input (LSW901 to LSW912)
I Rotary remote commander shift key A/D input terminal
I FM and AM (MW/LW) signal meter voltage detection input from the FM/AM tuner unit (TU1)
I AM (MW/LW) intermediate frequency detection signal input from the FM/AM tuner unit (TU1)
I FM intermediate frequency detection signal input from the FM/AM tuner unit (TU1)
— Power supply terminal (+5V)
I FM local oscillator detection signal input from the FM/AM tuner unit (TU1)
I AM (MW/LW) local oscillator detection signal input from the FM/AM tuner unit (TU1)
— Ground terminal
— Not used (open)
O Main charge-pump control signal output terminal
I Setting terminal for the test (fixed at "L")
O Not used (open)
O Seek control signal output to the FM/AM tuner unit (TU1)
O Not used (open)
O Beep sound output terminal
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "L"
Function
*, + ) + SEEK AMS, – = 0 SEEK AMS,
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