General Information - Pioneer PDP-4270XA Service Manual

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10. GENERAL INFORMATION

10.1 POWER ON SEQUENCE
REM
infrared
receiver
BUFF
REM
BUFF
Q4005
BUFF
Q8303
SR_OUT
SR OUT Jack
JA9004
1 : The remote control (or KEY) signal is input to the IF microcomputer.
2 : The IF microcomputer sends the operation data to the main microcomputer.
3 : The main microcomputer issues a startup command to the MOD microcomputer.
4 : The MOD microcomputer controls the relay of the power MOD of the PDP to startup the power of the PDP.
5
6
Side Keys
KEY_1
KEY_2
1
SR_IN IF_UCOM
IC8301
1
TXD_IF
RXD_IF
CE_IF
REQ_IF
BUSY_IF
PDP-427XD
6
7
MOD
4
Microcomputer
BUFF
MTXD_MD
MRXD_MD
REQ_MD
3
MAIN_UCOM
2
IC8401
7
8
Power MOD
RELAY Control
8
A
B
C
D
E
F
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