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6-1. IC PIN FUNCTION DESCRIPTION

SECTION 6DIAGRAMS
• MAIN BOARD IC501 µPD78058GC-F58-3B9 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 DSEL I Destination setting terminal Frequency select switch (S502) input in this set
“L”: MW 9k step or FM 50k step, “H”: MW 10k step or FM 200k step
2 RC IN0 I Rotary remote commander shift key A/D input terminal
3 SD IN I Station detector detect input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
4 AVSS — Ground terminal (for A/D converter)
5 ST I/O
6 PLLCE O PLL serial chip enable output to the FM/AM PLL (IC1)
7 AVREF1 I Reference voltage (+5V) input terminal (for D/A converter)
8 PLLSI I PLL serial data input from the FM/AM PLL (IC1)
9 PLLSO O PLL serial data output to the FM/AM PLL (IC1)
10 PLLCKO O PLL serial data transfer clock signal output to the FM/AM PLL (IC1)
11 P-STIN I Polar stereo signal input terminal Not used (fixed at “H”)
12 LCDSO O Serial data output to the liquid crystal display driver (IC901)
13 LCDCKO O Serial data transfer clock signal output to the liquid crystal display driver (IC901)
14 LCDCE O Chip enable output to the liquid crystal display driver (IC901)
15 LCDINH O Blank indicate control signal output to the liquid crystal display driver (IC901)
“L”: no display
16 UNISI I Serial data input from the bus interface (IC701) (for SONY bus)
17 UNISO O Serial data output to the bus interface (IC701) (for SONY bus)
18 UNICKI I Serial data reading clock signal input terminal (for SONY bus)
19 UNICKO O Serial data transfer clock signal output to the bus interface (IC701) (for SONY bus)
20 BUSON O Bus on/off control signal output to the bus interface (IC701) (for SONY bus) “L”: bus on
21 SYSRST O Reset signal output to the bus interface (IC701) (for SONY bus) “L”: reset
22 AMPON O Standby control signal output to the power amplifier (IC611) “L”: standby
23 AMP MUT O Muting control signal output to the power amplifier (IC611) “L”: muting on
24 TUNON O Tuner system power supply on/off control signal output to the BA3918 (IC671) “H”: tuner on
25 FM ON O FM system power supply on/off control signal output to the BA3918 (IC671) “H”: FM on
26 PW ON O Main system power supply on/off control signal output to the BA3918 (IC671) “H”: power on
27 COLOR I Input terminal to set whether the illumination color change function is present or not
“L”: illumination color change function is present (fixed at “L” in this set)
28 AMSON O Tape auto music sensor control signal output to the CXA2510AQ (IC301)
“L” is output to lower the gain for audio level at FF/REW
29 REL I Reel table rotation detect signal input from the take-up and supply reel sensor
30 MTLIN I Input terminal to set whether the auto metal function is present or not
“L”: auto metal function is present Not used this function in this set (fixed at “H”)
31 POS3 I
32 POS2 I
33 GND — Ground terminal
34 POS0 I
35 POS1 I
36 LM LOD O Loading/tape operation motor control signal output to the LB1638M (IC361)
(For the loading direction and forward side operation) *1
Tape position detect input from the tape operation switch on the mechanism block
Tape position detect input from the tape operation switch on the mechanism block
Input of FM stereo detection signal from FM/AM tuner unit (TU1), and output of forced
monaural control signal to FM/AM tuner unit (TU1) (Commonly used for stereo display input
and forced monaural output)
FM stereo detection at input of “L”, forced monaural at output of “L”