Service manual

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MD-MT80W/90W/90/90C
FUNCTION TABLE OF IC
1 P12/TCLKA CIN Input Track cross signal/focus drive detection
2 TCLKB SPIN Input Spindle motor FG pulse detection input
3* P14 REPCNT Input RF control
4 P15 DISCPR Input Disc record inhibition switch input
5* TIOCA2 SPWDS Input Spindle motor FG pulse width detection
6 P17 LCDRST Output Unit LCD driver reset control output
7 Vss VSS — Ground potential
8 TxD0 RMDAT Output Remote control indication data output
9 TxD1 DSPDAT Output Unit indication data output
10* P32 P32 Input Reserve
11 P33 DSPSTB Output Main unit display strobe output
12* SCK0 SCK0 Output Serial I/O clock output (not used)
13 SCK1 DSPSCK Output Unit indication data clock output
14 PE0 _EPCS Output EEPROM chip selection output
15 PE1 EEPD Input/Output EEPROM serial data input/output
16 PE2 EEPK Output EEPROM serial clock output
17 PE3 EPRT Output EEPROM write protection
18 Vss VSS — Ground potential
19* PE4 PE4 Output Reserve
20 PE5 SYRS Output System LSI register selection output
21 PE6 _SYRD Output System LSI read enable output
22 PE7 _SYWR Output System LSI write enable output
23-30 PD0-PD7 SYD0-SYD7 Input/Output System LSI parallel data bus
31 Vss VSS — Ground potential
32 PC0 RCLAT Output Record audio IC data latch output
33 PC1 _MCPGI Input Microphone plug insertion detection input
34 PC2 _INPGI Input Line/digital plug insertion detection
35 PC3 INPGCK Input Line/digital plug type detection
36 PC4 RCPCNT Input/Output Record circuit power control output
37* PC5 TEST1 Input Test mode setting input 1
38* PC6 TEST0 Input Test mode setting input 0
39 PC7 JPNP Input Kana conversion/Kana input existence/nonexistence discrimination
40 Vcc VCC Input Positive power supply
41 PB0 OPICGA Output P.U detection sensitivity switching output
42 PB1 PBOPON Output Audio IC output stage control output
43 PB2 PBLAT Output Audio IC data latch output
44 PB3 LDON Output P.U. laser ON/OFF control output
45 PB4 DISCP Output RF amp TE polarity switching output
46 PB5 SGAIN Output RF amp gain polarity switching output
47 PB6 RACLK Output Audio IC data clock output
48 PB7 RADAT Output Audio IC serial data output
49 Vss VSS — Ground potential
50* PA0 PAD0 Output Reserve
51* PA1 _ELONL Output EL lighting control output
52* PA2 PA2 Output Reserve
53 PA3 PDCNT Output Inner detection PD current control output
54 P20 INNSW Input Mechanism inner SW position detection input
55 P21 EMPHO Output Audio emphasis control output 0
56 TIOCC3 BUZOUT Output Beep sound pulse output
57 MD0 MD0 Input Operation mode selection input 0
IC401 RH-iX0409AWZZ :System Microcomputer (IX0409AW) (1/2)
Pin No.
Function
Port Name
Terminal Name Input/Output
In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.