Technics SH-AC500D - Technical Information and Diagrams; IC Terminal Functions

SH-AC500D |
@ Terminal Functions Of ICs
e 1C901 (M38B53M4057F) System Microprocessor
. Mark VO Function hs Mark vo Function
1 XCS O | Key Input 1 ~ 2 41~56| SEG1~SEG16 | O | FL digit signal output
2 SK O | Thermal/Over load input 1 57 INIT | | Diode input initial settings
3 DI O | Key Input 4 58 - | | Volume control output (Down)
4 DO | | Thermal/Over load input 2 59 PDN O | Volume control output (Up)
5~6 | STB1~STB2 | O | Stereo signal detect terminal 60 OVLERR | | REC Mute control
7~8 RA~RB | | Wake up timer LED 61 FRQO | | Serial data signal
9 -- |_| Control of RDS IC (ST) stereo signal 62 FRQ1 | | Power limitter control output
10 RESET | | Remote control terminal 63 AC3 |_| Tuner control (CE) chip enable signal
41 CK O | Reset detect terminal 64 AUDIO |_| Selector/Tuner (CK) clock signal
12 DATA O | Control of RDS IC (Ck) clock signal 65 CCS O | Selector/Tuner (DT) data signal
13 vss — | Control of RDS IC (DT) data signal 66 CCLK O | Selector control terminal
14 XIN -- | GND terminal 67 CDIN O | MMD control terminal
15 XOUT -- | Crystal oscillator terminal ( 4 MHz ) 68 CDOUT |_| Surround control (CK) clock signal
16 VDD/VCC -- | Crystal oscillator terminal (4 MHz ) 69 ss O | Surround control (DT) data signal
17~18| DIGITAL1~2 | O | LED driver IC (DT) data signal 70 SCK O | Surround control (CE) chip enable signal
19 LINE O | SFC mode encoder input 1 71 MOSI O | GND for A-D converter
20 STANDBY | O | SFC mode encoder input 2 72 MISO O | Reference voltage for A-D converter
21 | POWERSW | | | Selector encoder for input 1 73 AVSS — | SD signal detect input
22 REMOTE | | Blackout detection terminal 74 VREF — | Encoder of surround mode selector input1
23 HOLD | | Selector encoder for input 2 75 MRESET O | Help LED control output
24 POWER O | VCR2 control input 76 IFCD |_| Encoder of surround mode selector input2
25~27| A4053A~C | O | 6ch swcontrol output (ST) 77 TCS O | Video selector control output A
28 VEE -- | Power supply for FL driver 78 TRST O | Video selector control output B
29~30| MUTEA/S | O | Speaker B control output 79 KEY1 A/D| Key input 1
31~40| DIG10~DIG1 | O | Muting control output 80 KEY2 A/D| Key input 2
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