Start-Up Procedure - Philips AZT-9500 Service Manual

START-UP PROCEDURE -CHART
Start-up procedure for external DC supply,
POWER OFF
no accu inserted, hold-switch in off pos.,
(stand-by)
ESA on, resume-mode off, CD-door closed.
N
PLAY
pressed ?
Y
DC/DC converter
is switched on
µP resets
CD10&NPC
PORES=L
NPC_RES=L
µP initializes
CD10&NPC
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
focus found
during ramping
cycle ?
Y
µP calculates
ramping offset and
sends play-params
to CD10
re-initialize CD10 focus
N
stability test
and restart focus
ok ?
search procedure
µP accelerates
disc to nom. speed
re-initialize CD10
N disc at nom.
and restart focus
speed within
search procedure
~10s ?
µP initializes
radial servo loop
(~330ms)
µP releases
muting
(via MUTE)
µP sends command
to CD10: "jump
10 tracks inside"
radial
error handler
N
jump
ok ?
subcode
error handler
N
subcode
ok ?
TOC
found within
~30s ?
PLAY-MODE
3 - 4
N
Y
Y
Y
Y
N
Y
display shows
"nF d1SC"
start-up stopped
µP sends new focus
parameters to CD10
(switch to higher
focus sensitivity)
focus found
Y
during ramping
cycle ?
N
already
looped through
N
all (4) focus
sensitivities
?
Y
switch back to
normal focus
sensitivity
focus found
Y
during ramping
cycle ?
N
µP sends new focus
parameters to CD10
(switch to higher
focus sensitivity)
focus found
Y
during ramping
cycle ?
N
already
looped through N
all (4) focus
sensitivities
?
Y
display shows
"no d1SC"
start-up stopped