Pioneer PDP-42MXE10 Service Manual

PDP-425CMX
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8
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A
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E
7.1.8 POWER ON SEQUENCE
Descriptions on operation
1 When the main power switch on the main unit is set to ON, M+7 V is supplied from the POWER SUPPLY Assy to the main
microcomputer to boot it.
2 A request to turn on the power is issued from a key on the main unit or remote control unit.
3 The STB_MUTE signal (STB+3.3 V, ON/OFF control) is output from the main microcomputer to the power supply.
4 STB+3.3 V is supplied from the power supply to the MD microcomputer to boot it.
5 The MD microcomputer issues the REQ_MD signal to the main microcomputer. (QS2 data read request)
6 After confirming the QS2 data read request (confirming SD or PD), the main microcomputer issues PON.
7 The MD microcomputer sends a PON echo back to the main microcomputer.
8 The MD microcomputer issues the RELAY signal to turn on the unit.
REMI
M+3.3V
KEY ASSY
MAIN ASSY
Front key
LED2 ASSY
COMM SLOT
IF ASSY
COMM SLOT
ASSY
DIGITAL ASSY
POWER SUPPLY
ASSY
Remote-control
sensor
U2401
BUFF
IC8503
Main UCOM
IC9501
MD UCOM
IC3151
Power supply
UCOM
IC3151
BUFF
Q8503,Q8504
REG
M+7V → M+3.3V
6
7
5
3
KEY
STB+3.3V
TXD
22
M+3.3V
M+3.3V
M+3.3V
RXD
REQ_MD
STB_MUTE
M+7.0V
RELAY
4
8
1

Pioneer PDP-42MXE10 Specifications

General

Brand	Pioneer
Model	PDP-42MXE10
Category	Monitor
Language	English