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Diagnostic Software Descriptions and Troubleshooting
5.3
Display PCB
5.3.1
Display Test
The display test is performed by nucleus DispDisplay. By
putting a series of test patterns on the local display, the local
display is tested. To step through all different patterns, the user
must either press PLAY (pattern is ok) or PAUSE (pattern was
incorrect) to proceed to the next pattern. The display of
patterns is continued in a cyclic manner, shown in Fig. 5-5, until
the user presses NEXT. If the user presses NEXT before all
display patterns are tested, the DispDisplay nucleus will return
FALSE (display test unsuccessful).
If OK, press PLAY
If OK, press PLAY
If OK, press PLAY
press NEXT to continue
Figure 5-5
5.3.2
LED Test
The LED(s) on the DVD player is (are) tested by nucleus
DispLed. The user must check if the LED(s) is (are) lighted; if it
is, press PLAY, if it is not, press PAUSE. By pressing NEXT the
script will proceed to the next test. If the user presses NEXT
before PLAY or PAUSE, the DispLed nucleus will return TRUE
(LED test successful).
5.3.3
Keyboard Test
The keyboard of the DVD player is tested by nucleus
DispKeyb. The user is expected to press all keys on the local
keyboard once. The code of the key pressed is shown on the
local display (1 hexadecimal digit) immediately followed by a
(hexadecimal) number indicating how many times that key has
been pressed. Example of the local display during this test:
Figure 5-6
The key-codes displayed on the local display will scroll from
right to left when the display gets full, the text "tb-" will remain
on display.
If NOK, press PAUSE
If NOK, press PAUSE
If NOK, press PAUSE
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Key ID
Key
0
PLAY
1
NEXT
2
PREVIOUS
3
PAUSE
4
STOP
5
OPEN / CLOSE
6
AUDIO / DIRECT
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Figure 5-7
If any keys are detected more than once (due to hardware
error), the key-code is displayed twice (or more), with the
second digit increased by 1.
If the user does not press all keys minimally once (in any order),
the DispKeys nucleus will return FALSE and cause an error in
the overall result of the player script.
The user can leave the keyboard test by pressing the NEXT
key on the local display of the DVD player for at least one full
second.
The result of the keyboard test is shown on local display as
follows:
Figure 5-8
Or
Figure 5-9
Pressing NEXT on the local keyboard again will proceed to the
next text.
5.3.4
Remote Control Test
The remote control of the DVD player is tested by nucleus
DispRc. The user must press any key on the remote control just
once. The codes of the key pressed will be shown on the local
display in hexadecimal format. Example:
Figure 5-10
In this example 23 is the hexidecimal code of the pressed RC
key. The user can leave the remote-control test by pressing
NEXT on the local keyboard of the DVD player. The remote
control test is successful if a code was received before the user
pressed the NEXT key; pressing the NEXT key before pressing
a key on the remote control gives an error in the remote control
test (note that the remote control test will also fail if a key on the
remote control was pressed but no code was received). The
remote control test does not check upon the contents of the
5.
EN 23
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