Start-Up Procedure - Philips AZ7381 Service Manual

START-UP PROCEDURE

Start-up procedure for ext.DC supply,
POWER OFF
no accu inserted, hold-switch in off pos.,
(stand-by)
ESA/ESP off, resume-mode off, CD-door closed.
N
PLAY
pressed ?
Y
µP switches
DC/DC converter on
(POWER=L)
µP resets CD7&NPC
PORES=L
NPC_RES=L
µP initializes CD7
with default
parameter/settings
µP sends
command to CD7:
"move slide inside"
inner switch
N
closed within
6sec ?
Y
µP sends
command to CD7:
"move slide outside"
inner switch
N
open within
0.3sec ?
Y
µP accelerates
disc motor for
200msec
3-4
µP sends
command to CD7:
"switch laser on"
µP sends
commands to CD7:
"slide servo off"
"focus servo on"
focus
N
found within
3sec ?
Y
release MUTE
µP accelerates
disc to nom. speed
disc at nom.
N
speed within
6sec ?
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
PLAY-MODE
focus search
error handler
focus search ?
display shows
display shows
"Error"
start-up stopped
start-up stopped
Y
retry
N
"no disc"
CS 46 520