Reset On Sequence - Pioneer BDP-09FD Service Manual

5

5.3 RESET ON SEQUENCE

[On start-up]
Receiving Power ON key, sub-microcomputer turns Power_ON signal to "H".
Receiving Power ON signal, power turns each SW power to "ON".
1.1 V turns ON.
Sub-microcomputer is (after 400 ms) to Reset_SKY#, Reset 2#, Reset 3# "L" turn to "H".
Power_ON
1.1 V
Reset_SKY#,2#,3#
[At normal end]
Sub-microcomputer detects the pushing of Power key, then notifies PowerOFF to R8A34019BG by I C.
Receiving PowerOFF notification, R8A34019BG conducts end processing.
R8A34019BG instructs PowerOFF to sub-microcomputer by I C.
Sub-microcomputer turns Reset_SKY#, Reset 2#,Reset 3#,to "L", and after 1 sec, PowerON signal to "L".
After 50msec, power turns each SW power to OFF.
Reset_SKY#,2#,3#
Power_ON
[Power abnormality]
*Reset operation in the case of 1.1 V drop.
Determine if ResetG becomes "L", then turn Reset# - Reset3# to "L".
[At abnormal end]
ACOFF
By turning V+1R1D to OFF, ResetG# turns to "L" by ResetIC.
Power_ON
V+1R1D
Reset
(IC4201 OUT)
Reset_SKY#,
Reset 2#,
Reset 3#
5
6
PON key
400 ms
1 sec
6
7
2
BDP-09FD
7
8
A
B
2
C
D
E
F
33
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