Pioneer PDP-508XDA - Power on Sequence

PDP-508XG
21
5678
56
7
8
C
D
F
A
B
E
4.1.2 POWER ON SEQUENCE
 : The remote control (or KEY) signal is input to the IF microcomputer.
 : The IF microcomputer sends the operation data of the remote control unit (or KEY) to the main microcomputer.
 : The main microcomputer issues a startup command (PON) to the MOD microcomputer.
 : The relay is controlled with logical OR interpretation of control signals by the main microcomputer and module
(MOD) microcomputer.
MOD
Microcomputer
IC3151
OR
MAIN
Microcomputer
IC8401
IF
Microcomputer
IC8301
Power MOD
RELAY Control
REM
Inv. Amp
Q9731
REM
infrared
receiver
Side Keys
SR OUT Jack
JA9404
4
1
2
1
RELAY2
SR_OUT
KEY_1
KEY_2
TXD_MD
RXD_MD
REQ_MD
SR_IN
TXD_IF
RXD_IF
CE_IF
REQ_IF
BUSY_IF
Inv. Amp
Q8302
Inv. Amp
Q4105
3