Philips LX9000R/22, Service Manual

Page: 27 / 251

EN 27 5. LX9000R Diagnostic Software
servtest LX9000R sh 3, 060503
Press PLAY button.
STOP button
pressed?
T
button
pressed?
N
Y
Y
Display shows
all segments and flags
for checking open circuits.
see figure 1
All LEDs are switched off.
Backlight is switched on.
Switch intensity of the
backlight diodes to next step.
(toggles backlight intensity
to
half / off / full
intensity)
Y
DISPLAY TEST
Back to main menu.
fig. 1
S
button
pressed?
Switch on LEDs in following
sequence:
Standby, Instant Record,
Record, off
Y
PASS
Y
EEPROM TEST
Display shows
ERR
Display shows
Test pattern is written to
address 1
and
read back again
STOP button
pressed?
Test ok?
N
Y
N
Y
Press PLAY button.
Back to main menu.
Back to main menu.
Y
FORMAT EEPROM
Display shows
for 2s.
EEPROM is cleared and
default values are stored.
NEW
Press PLAY button.
The test checks writing and reading of data to the EEPROM.
A test pattern is written to the first location in the EEPROM.
PASS
is displayed when the test pattern is read back correctly,
else
ERR
.
Each software module using the EEPROM is forced to write the
default values in its part of the EEPROM.
This test should only be used to clear the EEPROM in case
of a µP-"hangup".
The DISPLAY test is intended to check the driver circuits,
the display module and the LEDs for open- or short-
circuits.
The LEDs
Standby, Instant Record and Record can be
switched on/off separately.
The intensity of the backlight LEDs can be switched in 3
steps: full, half, off
Press
S
or
T
button
and select
EEPROM
Press
S
or
T
button
and select
DISPLAY
Press
S
or
T
button
and select
EP FORMAT