Philips DVDR1000/001 Service Manual page 37

5. Diagnostic Software and Faultfinding Trees
Due to the complexity of the DVD recorder, the time to find a
defect in the recorder can become long. To reduce this time,
the recorder has been equipped with Diagnostic and Service
software (DS). The DS offers functionality to diagnose the
DVDR hardware and tests the following:
• Interconnections between components
• Accessibility of components
• Functionality of the audio and video paths
This functionality can be accessed via several interfaces:
1. End user/Dealer script interface
2. Player script interface
3. Menu and command interface
5.1 End User/Dealer Script Interface
5.1.1 Description
The End user/Dealer script interface gives a diagnosis on a
stand alone DVD recorder; no other equipment is needed.
During this mode, a number of hardware tests (nuclei) are
automatically executed to check if the recorder is faulty. The
diagnosis is simply a "fail" or "pass" message. If the message
"FAIL" appears on the display, there is apparently a failure in
the recorder. If the message "PASS" appears, the nuclei in
this mode have been executed successfully. There can be
still a failure in the recorder because the nuclei in this mode
don't cover the complete functionality of the recorder.
5.1.2 Contents
Unplug the power cord
Hold key <PLAY> pressed
while you plug the recorder
During the test, the following display
is shown: the counter counts down
from the number of nuclei to be run
before the test finishes. Example:
NO
SET O.K.?
YES
Figure 5-1
The End use/Dealer script executes all diagnostic nuclei that
do not need any user interaction and are meaningful on a
standalone DVD recorder. The nuclei called in the End user/
Dealer script are the following:
22 HostdSdramWrR check of all memory locations of
21 HostdDramWrR
20 HostdI2cNvram
19 SAA711XI2c
18 VideoEncI2c
Diagnostic Software and Faultfinding Trees
To exit DEALER SCRIPT, unplug the power cord
CL 16532095_068.eps
the 4MB SDRAMS
check of all the DRAMS
check of the data line and the
clock line of the I2C bus between
the host decoder and NVRAM
checks the interface between the
host I2C controller and the Video
Input Processor SAA7118
checks the interface between the
host I2C controller and the Video
Encoder SAA6750
DVDR1000 /0x1 /691
17 AudioEncI2c
16 AudioEncAccess this nucleus tests the HIO8 inter-
15 AudioEncS-
ramAccess
14 AudioEncS-
ramWrR
13 AudioEncInter-
rupt
12 VsmAccess
11 VsmInterrupt
10 VsmSdramWrR
9 Clock11_289MHz switches the A_CLK of the micro
8 Clock12_288MHz switches the A_CLK of the micro
7 BeS2Bengine
6 DisplayEcho
5 AnalogueEcho
4 AnalogueNvram
3 AnalogueTuner
2 LoopAudioUser-
Dealer
1 LoopVideoUser-
150801
Dealer
5.2 Player Script Interface
5.2.1 Description
The Player script will give the opportunity to perform a test
that will determine which of the DVD recorder's modules are
faulty, to read the error log and to perform an endurance loop
test. To successfully perform the tests, the DVD recorder
must be connected to a TV set.
To be able to check results of certain nuclei, the player script
expects some interaction of the user (i.e. to approve a test
picture or a test sound). Some nuclei (e.g. nuclei that test
functionality of the DVDR module) require that a DVD+RW
disc is inserted.
Only tests within the scope of the diagnostic software will be
executed hence only faults within this scope can be detected.
5. GB 37
checks the I2C connection be-
tween the host decoder and the
audio encoder
face lines between the host de-
coder and the audio encoder
check of the access of the SRAM
by the audio encoder (address
and data lines)
tests the SRAM connected to the
audio encoder
tests the interrupt line between
the host decoder and the audio
encoder
checks the data and address bus
and the interrupt register of the
VSM
checks both interrupt lines be-
tween the VSM and the host de-
coder
tests the entire SDRAM of the
VSM
clock to 11.2896 MHz
clock to 12.288 MHz
checks the S2B interface with the
Basic Engine by sending an echo
command
checks the interface between the
host processor and the slave
processor on the display board
checks the interface between the
host processor and the micro-
processor on the analogue board
checks the NVRAM on the ana-
logue board
checks whether the tuner on the
analogue board is accessible
tests the components on the au-
dio signal path
Host decoder
Analogue board
Audio encoder
VSM
tests the components on the vid-
eo signal path
VIP
VSM
Host decoder