Service manual

MD-MS722H/MS721H
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1 P12/TCLKA CIN Input Track cross signal/focus drive detection
2 P13 SPIN Output Spindle motor FG pulse detection input
3 P14 DISCIN Input Disc insertion detection input
4 P15 DISCCPR Input Disc record inhibition switch input
5* TIOCA2 SPWDS Input Spindle motor FG pulse width detection
6 P17 PDCNT Output Inner detection PD current 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 DSPSTB Output Unit indication strobe output
11* P33 P33 Output Spare
12* SCK0 SCk0 Output Serial IO 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 PHOLD Output System power ON holding output when battery is used
18 Vss VSS — Ground potential
19 PE4 PCNT1 Outout Vref supply control output of power IC
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 PCLAT 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 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 — Positive power supply
41* PB0 PB0 Output Spare
42 PB1 _ELONH Output Remote control EL'H' lighting control output
43* PB2 PB2 Output Spare
44 PB3 LDON Output P.U. laser ON/OFF control output
45 PB4 OPICGA Output P.U. detection sensitivity selection output
46 PB5 RFLAT Output RF amplifier IC data latch output
47 PB6 RACLK Output RF/Audio IC data clock output
48 PB7 _ELONL Input/Output Remote control EL 'L' lighting control output
49 Vss VSS — Ground potential
50 PA0 RADAT Output RF/Audio IC serial data output
51 PA1 PBLAT Output Audio IC data latch output
52 PA2 REC Input Unit REC key operation detection input
53 PA3 PBOPON Output Audio IC output stage control output
54 P20 RPLAY Input Remote control PLAY key operation detection input
55 P21 _KHOLD Input Unit key hold switch input
56 TIOCC3 BUZOUT Output Beep sound pulse output
57 MD0 MD0 Input Operation mode selection input 0
IC401 RH-iX2772AF03(IX2772AF):System Microcomputer (1/2)
FUNCTION TABLE OF IC
Pin No.
FunctionPort Name Terminal Name
Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.