Start-Up Procedure - Philips AZ7900 Service Manual

START-UP PROCEDURE – FLOW CHART
Start-up procedure for ext.DC supply,
POWER OFF
no accu inserted, hold-switch in off pos.,
(stand-by)
resume-mode off, CD-door closed.
N
PLAY
pressed ?
Y
DC/DC converter
is switched on
µP resets CD10
PORES=L
µP initializes
CD10 with default
parameter/settings
µP sends
command to CD10:
"move slide inside"
inner switch
N
closed within
~6s ?
Y
µP sends
command to CD10:
"move slide outside"
inner switch
N
open within
~0.3s ?
Y
µP sends
commands to CD10:
"slide servo off"
µP sends
commands to CD10:
"laser on"
"focus servo on"
µP accelerates
disc motor for
~200ms
CS 46 549
3-4
focus
N
found within
~2s ?
Y
release MUTE
µP accelerates
disc to nom. speed
disc at nom.
N
speed within
~6s ?
Y
µP initializes
radial servo loop
radial check
error handler
Y
radial&jump
check error ?
subcode check
N
error handler
Y
subcode check
error ?
N
TOC
N
found within
~5s ?
Y
display shows
"nF d1SC"
PLAY-MODE
start-up stopped
toggle
play mode
"normal" ↔ "CD-RW"
focus
N
found within
~2s ?
Y
focus search
error handler
Y
retry
focus search ?
N
display shows
"no d1SC"
start-up stopped