Start-Up Procedure - Philips AX 2100 Service Manual

START-UP PROCEDURE – FLOW CHART
START-UP PROCEDURE - FLOW CHART
POWER OFF
(stand-by)
N
PLAY
pressed ?
Y
DC/DC converter
is switched on
(via WAKE)
µP resets
CD10 and NPC
PORES=L
NPC_RESET=L
µP initializes
CD10 and NPC
with default
parameter/settings
µP switches
headphone amplifier
on (via LF_POW)
µP outputs servo
signal for disc motor
(DM_PWM 50% duty)
µP switches
servo driver on
(via S_MUTE)
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
~0.25s ?
Y
µP sends
commands to CD10:
"slide servo off"
µP accelerates
disc motor for
~200ms
µP sends
commands to CD10:
"laser on"
"focus servo on"
Start-up procedure for ext.DC supply,
no accu inserted, hold-switch in off pos.,
ESP on, resume-mode off, CD-door closed.
re-initialize CD10
and restart focus
search procedure
re-initialize CD10
and restart focus
search procedure
radial
error handler
subcode
error handler
3-4
focus found
N
during ramping
cycle ?
Y
µP calculates
ramping offset and
sends play-params
to CD10
focus
N
stability test
ok ?
Y
µP accelerates
disc to nom. speed
N disc at nom.
speed within
~10s ?
Y
µP initializes
radial servo loop
(~330ms)
µP releases
muting
(via MUTE)
µP sends command
to CD10: "jump
10 tracks inside"
N
jump
ok ?
Y
N
subcode
ok ?
Y
TOC
N
found within
~30s ?
Y
PLAY-MODE
start-up stopped
µP sends new focus
parameters to CD10
(switch to higher
focus sensitivity)
focus found
Y
during ramping
cycle ?
already
looped through
all (4) focus
sensitivities
?
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 ?
already
looped through
all (4) focus
sensitivities
?
display shows
display shows
"no d1SC"
"nF d1SC"
start-up stopped
N
N
Y
N
N
Y