Service manual

MD-MS722H/MS721H
– 41 –
58 MD1 MD1 Input Operation mode selection input 1
59 P23 INNSW Input Mechanism inner SW position detection input
60* WDTOVF WDTOVF Output Watch dog timer (not used)
61 MD2 MD2 Input Operation mode selection input 2
62 RES _RESET Input Microcomputer hard reset input
63 NMI _NMI Input Nonmaskable interruption (not used)
64 STBY _STBY Input Microcomputer standby input (not used)
65 Vcc VCC — Positive power supply
66 XTAL XTAL — Crystal connection terminal
67 EXTAL EXTAL — Crystal connection terminal
68 Vss VSS — Ground potential
69 PF7 _STOP Input Unit STOP key operation detection input
70 PF6 PLAY Input Unit PLAY key operation detection input
71 PF5 EMPHO Output Audio emphasis control output 0
72 PF4 JOG0 Input Jog encoder input 0
73 PF3 JOG1 Input Jog encoder input 1
74* PF2 PF2 Output Spare
75* PF1/IRQ1 _IRQ1 Output Software standby return request
76 IRQ0 _DINT Input System LSI interruption request input
77 AVcc AVCC — A/D and D/A converter positive power supply
78 Vref VREF — A/D and D/A converter reference voltage
79 AN0 PLVDRY Input Dry battery voltage detection input
80 AN1 PLVDCI Input DC jack voltage detection input
81 AN2 PLVINN Input Lithium battery voltage detection input
82 AN3 RKEY Input Remote control key operation detection input
83 AN4 HKEY1 Input Unit key operation detection input 1
84 AN5 HKEY2 Input Unit key operation detection input 2
85 AN6 TEMP Input Ambient temperature detection input
86 DA1 LDVAR Output P.U. laser power setting output
87 AVss AVSS — A/D and D/A converter ground potential
88 Vss VSS — Ground potential
89 P24 START Input Disc insertion start-up detection input
90* TIOCB4 MCMON Output Internal operation status monitor output
91* P26 P91 Output Spare
92 P27 DCNT1M Output Mechanism driver enable output
93 PG0 SENSE Input System LSI servo sense input
94 PG1 _FOK Input Focus OK signal input
95 PG2 _XRST Output System LSI hard reset output
96 PG3 CKSTP Output Microcomputer sleeve operation monitor output
97 PG4 EJSW Input Ejection lever operation detection input
98 Vcc VCC — Positive power supply
99 P10 PCNT2 Output Vcc supply control output of power IC
100 P11 HDON Output Recording head current control output
IC401 RH-iX2772AF03(IX2772AF):System Microcomputer (2/2)
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.