Diagnostic Software
GB 47CDR779 6.
6.3.1 Description
The intention of the electrical service diagnostics is to show
the software versions present in the player and to direct the
dealer towards defective internal units. The units are : the
CDR main board, the CDR loader, the CD loader in case of
a CDR779 and the keyboard/display board. A sequence of
tests is executed automatically. Some of the tests can be
aborted or skipped without the result being taken into
account. External tools or disassembly of the unit is not
necessary to get the diagnostic information. Pressing keys
[PLAY/PAUSE] and [F FWD] simultaneously while switching
on the unit, starts the test. Switching off the unit ends the test.
6.3.2 Requirements to perform the test
• Working keyboard to start up the test.
• Working local display to check the output messages.
• A CD-DA disc with a minimum of 3 tracks in all trays to
perform the disc test.
6.3.3 Description of the tests
Player information
In this part of the test the following important information can
be checked without removing the cover :
• Recorder ID.
• SW-version back end of player.
• SW-version CDR loader.
• SW-version CD loader (only for CDR779).
CDR main board test
[F FWD] key. The message "DERRn" will be displayed with n
indicating the faulty test number.
If one of the tests is aborted with the [F FWD] key, no error
message will be displayed for this test. The flash data erase
test ("DTST3") can not be aborted !
The CDR main board test consists out of :
DRAM test
Display : "DTST1". The DRAM used for buffer management
is tested by writing, reading and verifying test patterns.
Flash checksum test
Display : "DTST2". This test checks the checksum of the
player's SW stored in the flash.
Flash data erase
Display : "DTST3". During this test, all temporary information
(CDtxt) in the flash is erased.
CODEC (ADC/DAC) test
Display : "DTST4". This test checks the CODEC IC by
writing, reading and verifying test patterns. The test is not
applicable for CDR779.
CDR communication test
Display : "DTST5". The communication between the host
processor (DASP) and the CDR loader via the DSA-R-bus is
tested.
CD communication test
Display : "DTST6"). The communication between the host
processor (DASP) and the CD loader is tested. The test is
only applicable for CDR779.
Loader tests
These tests determine if the CDR loader and the CD loader
in case of a CDR779 work correctly. A CD-DA disc with a
minimum of 3 tracks needs to be inserted in both loaders. A
disc test is executed to check focus control, disc motor
control, radial control and jump grooves control. The disc test
is performed by audio play-back of 5 seconds at the
beginning, middle and end of the disc.
CDR loader test
During the test, the current disc time is shown. In case of an
error the message "BERR1" will be displayed and the [F
FWD] key must be pressed to continue with the following
test. Pressing the [F FWD] key also aborts this test.
CD loader test
For CDR779 only. During the test, the current disc time is
shown. In case of an error the message "BERR2" will be
displayed and the [F FWD] key must be pressed to continue
with the following test. Pressing the [F FWD] key also aborts
this test.
Display test
All segments will blink at a frequency of 1 Hz. Pressing the [F
FWD] key will start the next test because the user has to
check for himself if all segments work properly.
Keyboard and remote control tests
The test will give the user the ability to test every key without
executing the function assigned to it. Therefore, the user
needs to press every key on the keyboard and the remote
control. The display will show the name of the key being
pressed. Pressing more than one key at once will give an
unpredictable result except for the service combinations :
[PLAY/PAUSE] + [STOP], [PLAY/PAUSE] + [F FWD], [F
FWD] + [REWIND], [ERASE] + [RECORD], [PLAY/PAUSE]
+ [RECORD], [OPEN/CLOSE] + [PROGRAM].
6.4 Mechanical service diagnostics
Figure 6-3
6.4.1 Description
No external tools are required to perform this test. The cover
needs to be removed because the user has to check the
movements of the tray, focus and sledge visually. Pressing
keys [PLAY/PAUSE] and [STOP] simultaneously while
switching on the unit, starts the test. Switching off the unit
ends the test. In case of a CDR779, one can check the CD
loader mechanics in the same way by pressing the above key
combination on the CD player keys.
6.4.2 Requirements to perform the test
• Working keyboard to cycle through the tests and to start
up the test.
• Working local display to check the output messages.
FOCUS TEST
Display shows
“BUSY”
Visual inspection
TRAY TEST
Visual inspection
Display shows
“OPENED”
even if tray is blocked
<
OPEN
>
<
CLOSE
>
SLEDGE TEST
Visual inspection
<FWD><REWIND>
MECHANICAL SERVICE DIAGNOSTICS
(test for defective components)
Press <PLAY/PAUSE> + <STOP>
simultaneously and switch
ON unit
If power ON,
switch power OFF
To end test, switch OFF unit
Display shows
“BUSY”
CL96532086_026.eps
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