Philips CDR785/00 Service Manual page 30

To enter Service
* To leave Service Testprogram plug mains cord off.
Testprogram hold
CD y CD & NO buttons
depressed while
plugging mainscord in.
On/Off switch in pos. ON
S
Display shows
stands for Service mode
version number
VXX
stands for version number
of the µP - software.
of the software used in the
S-CDR785-VXX
front µP.
CDR ELECTRICAL TEST
Insert CD-DA disc CDR button N
before starting the test pressed?
Y
MODULE
INFORMATION
Display shows for 2s each:
• Software version of DASP
(flash ROM 7703)
• Software version of
basic engine processor
(flash EPROM 7208)
DRAM TEST 7702
Display shows:
DTST1
CHECKSUM TEST 7703
Display shows:
DTST2
ERASE TEST 7208
Display shows:
DTST3
ADC/DAC TEST 7406
Display shows:
DTST4
COMMUNICATION TEST
(DSA-BUS)
Display shows:
DTST5
N
TEST O.K.?
n=number of failed test
Y
N
CD-DA disc
inserted?
Y
Display shows actual
playing time.
The test is performed by
playing 5s at beginning,
5s in the middle and 5s at
the end of the disc.
N
TEST O.K.?
Y
Exit CDR electrical Test
5-5
MAIN BOARD DIAGNOSTIC
FFWD 6 button
pressed? N
Y
FFWD 6 button
pressed? N
Y
FFWD 6 button
pressed? N
Y
FFWD 6 button
N
pressed?
Y
Display shows:
FFWD 6 button N N
DERR n
all errors shown?
pressed?
Y Y
Display shows next error
CDR - LOADER TEST
Display shows: N
FFWD 6 button
NO DISC
pressed?
Y
FFWD 6 button
N
pressed?
Y
Exit CDR electrical Test
Display shows:
FFWD 6 button N
BERR 1
pressed?
Y
Exit CDR electrical Test
SERVICE TESTPROGRAM
CDR MODULE
CDR MECHANICAL TEST
for visual inspection only
FINALIZE button
pressed?
Y
FOCUS TEST
Objective moves
continuously up/down.
Display shows:
BUSY
SLIDE TEST
NEXT 6 button
N STOP button
pressed? pressed?
Y
Y
Slide moves
Exit Mech. Testprogram
continuously in/out.
Display shows:
BUSY
PREV 5 button
pressed?
Y
Dependent on the
moving direction,
slide moves to inner
or outer end position.
5-5
CDR DC-ERASE MODE
N
TRAY TEST
N N
OPEN/CLOSE button
pressed?
Y
Tray opens.
Display shows:
OPENED
(even when tray is blocked)
N N
OPEN/CLOSE button
pressed?
Y
Tray closes.
Display shows:
CLOSE
(even when tray is blocked)
Note: With the DC-Erase mode the CD-RW can be
changed back in its original state, like a new disc.
Stopping the erase-function by switching power off
will leave the disc in an unpredictable status!
ERASE button N
pressed?
Y
Complete disc will be
erased with double speed.
(starting from PMA-area
up to and including
ATIP leadout area)
The display shows the
countdown of the
remaining time required
to complete the operation:
ER mm ss
mm: remaining minutes
ss: remaining seconds
N
Disc erased?
Y
Display shows:
PASSED
STOP button N
pressed?
Y
Exit DC-ERASE Mode
CDR785 servtest CDR,160200