PDP-507CMX
189
5678
56
7
8
C
D
F
A
B
E
10. GENERAL INFORMATION
10.1 POWER ON SEQUENCE
Outline of operations
1 Once AC power is input, 3.3 V power is supplied to the MD microcomputer by the Power Unit.
Then the MD microcomputer starts up.
2 Once the Main power switch on the main unit is set to ON, M+7 V power is supplied to the Main microcomputer
by the Power Unit. Then the Main microcomputer starts up.
3 A power-on request can be issued from a key on the main unit or on the remote control unit.
4 After confirming a QS2 (checking of SD or PD), the Main microcomputer issues a PON command.
5 The MD microcomputer returns a PON echo to the Main microcomputer.
6 The MD microcomputer sends the RELAY signal to start up the Power microcomputer.
REMI
M+3.3V
KEY ASSY
MAIN ASSY
Front key
LED ASSY
COMMSLOT
IF ASSY
COMMSLOT
ASSY
DIGITAL ASSY
POWER SUPPLY
ASSY
REM infrared
reciver
U2101
BUFF
IC8503
Main Microcomputer
IC9501
MD
Microco
mputer
IC3151
Power
Microcomputer
IC3151
REG
M+7V → M+3.3V
4
KEY
STB+3.3V
TXD
33
M+3.3V
M+3.3V
RXD
AC Input
M+7.0V
RELAY
6
2
5
1
1
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