Philips MCW770 Service Manual page 19

SERVICE TESTPROGRAM
PART 1
DISPLAY TEST
N DISC 2 button N SOURCE button
pressed?
Y
Display toggles 3x
Display shows all
firmware version of
segments and flags
Control µP7801 and
for checking open circuits.
version of the MP3 board:
Except for the Standby LED
all LEDs are switched on. 5DTC-VXX
See figure 1 and table 1.
MP3CD 02
N DISC 2 button
N
pressed?
Y
Display shows figure 2.
All alternate pins (2, 4, ..)
Display shows SW version
of the µP display control pins
of the (TI)µP / MP3 decoder
are activated
located on the MP3 board:
for checking short circuits.
TI-V22
See figure 2 and table 1.
N STOP button
N
pressed?
Y
Communication check
between Front µP and
Display shows
fig. 1
N
Slide moves to inner side.
Display shows
TI-SLD I
fig. 2
N
pattern1 pattern 2
CD source LED on on
Slide moves to the outside.
TUNER source LED on off
Display shows
AUX source LED on on
TI-SLD O
PC Link source LED on off
Light bar top full brightness half brightness
table 1
N
Note: the lightbar bottom and the PC link-communication LED
are controlled by the WESSLI board and thus not
activated in this test.
Focus search starts.
Display shows
N STOP button
5-3
5 Disc Tray Changer TEST
Insert disc in tray 1
before starting the test.
pressed?
Y
Remark: Reading the SW versions
may take a few seconds.
T button S button
N
pressed? pressed?
Y Y
T button
pressed?
Y
MP3 board.
BUS OK
else
BUS ER
T button S button
N
pressed? pressed?
Y
Y
T button S button
N
pressed? pressed?
Y
Y
T button S button N
pressed? pressed?
Y Y
1)
As the slide has been moved to the utmost possible outside position before
1) the OPU may stand outside the regular data area of the disc.
FOC OK
Thus no Focus might be found.
else
To get a reliable result on the Focus test it is recommended to skip the Slide movement
by pressing T button twice in quick succession.
FOC ER
S button
N
pressed? pressed?
Y Y
To enter Service
* To leave Service Testprogram plug mains cord off.
Testprogram hold
2;´ & HOME buttons
* In the main menu the sound settings (volume, ...)
depressed while work as in normal mode.
plugging mains cord in.
S
stands for Service mode
The display shows.
VXX
stands for Version number
S-VXX
of the software used in the
Front (Display) µP.
"WESSLI" FIRMWARE FORMAT EEPROM
VERSIONS
N PC Link button S button
pressed?
pressed?
Y Y
Display shows Remark: Reading the SW versions
Display shows
may take up to 20s.
PC LINK NEW
for 2s.
and toggles
OP stands for Operating system
EEPROM is cleared and
firmware versions of the
APP
"WESSLI" board: default values are stored.
stands for Application SW
OS V XXXX
APP V XXXX
This test should only be used to clear
the EEPROM in case of a µP-"hangup".
Lightbar bottom is switched
on and communication LED
is blinking.
N PC Link button
pressed?
Y
Communication check:
WESSLI controller reads
MAC address of the wireless
LAN card.
Display shows
PASSED
else
FAULT
N STOP button
pressed?
Y
5-3
EEPROM TEST
N T button N
pressed?
Y
Testpattern is written to
address 1
and
read back again
N
Test ok?
Y
Tact frequency Front µP
Display shows Display shows
ERR PASS
STOP button
N
pressed?
Y
QUARTZ TEST
4
button N
pressed?
Y
Clock Oscillator
divided 32768Hz
Display shows
32K
2048Hz can be measured
2)
on (pin 11 of µP).
1
4
button
N
pressed?
Y
divided 12MHz
Display shows
12M
2929±15Hz can be meas.
on 1 (pin 11 of µP).
STOP button N
pressed?
Y
2)
Test frequency can easy be accessed on
Combi board, connector 1012, pin 3.
Nominal: 2048Hz (488,2813µs)
Tolerance: ±1s/day
2047,9763 - 2048,0237Hz
(488,2869 - 488,2756µs)
MCW770 servtest 1, 17.07.04