Diagnostic Software - Yamaha DRX-1 Service Manual

DRX-1

DIAGNOSTIC SOFTWARE

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
1. End User/Dealer Script Interface
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.
Counter Nucleus Name
22 104 HostdSdramWrR
21 106 HostdDramWrR
20 123 HostdI2cNvram
19 202 SAA7118I2c
18 200 VideoEncI2c
17 207 AudioEncI2c
16 204 AudioEncAccess
15 203 AudioEncSramAccess
14 205 AudioEncSramWrR
13 206 AudioEncInterrupt
12 300 VsmAccess
11 303 VsmInterrupt
10 302 VsmSdramWrR
9 1400 Clock11_289MHz
8 1401 Clock12_288MHz
7 601 BeS2Bengine
6 500 DisplayEcho
5 700 AnalogueEcho
4 711 AnalogueNvram
12
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:
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:
Description
checks all memory locations of the 4MB SDRAM
checks all the DRAM connected to the microprocessor of the digital board
checks the data line (SDA) and the clock line (SCL) of the I2C bus between the host
decoder and NVRAM
checks the interface between the Host I2C controller and the AVENC SAA7118 Video
Input Processor
checks the interface between the host I2C controller and Empress SAA6752
checks the I2C connection between the host decoder and Empress SAA6752
tests the HIO8 interface lines between the host decoder and the audio encoder
checks 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 whether the VSM interrupt controllers and DRAM are accessible
checks both interrupt lines between the VSM and the host decoder
tests the entire SDRAM of the VSM
switches the A_CLK of the micro clock to 11.2896 MHz
switches the A_CLK of the micro 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 microprocessor on the
analogue board
checks the NVRAM on the analogue board
NO
SET O.K.?
YES
To exit DEALER SCRIPT, unplug the power cord
Fig. 1