Philips DVDR985 Technical Training Manual page 10

Description
The End User/Dealer Self Diagnostics work with-
out the need for other equipment. A number of
hardware tests are automatically executed to
check for faults in the recorder. The diagnosis
ends with a "FAIL" or "PASS" message. If the
message "FAIL" appears on the display, an Error
Code is displayed. If the message "PASS"
appears, the tests have been executed success-
fully. There can still be a failure in the recorder.
The tests do not cover the complete unit. The
following list describes the tests being preformed
while the test number is being displayed on the
Front Panel. To place the unit in the Self Test
Mode, hold the Play pushbutton on the Front
Panel while suppling AC power to the unit. The
display counts down numerically the test it is
performing.
The following is a list of the test displayed as:
"Test Number" is displayed on the Front Panel
"Name"of the test
Description of the test
22
SdramWrR
Checks all memory locations of the 4Mbyte
SDRAM
21
HostdDramWrR
Checks all the DRAM connected to the micro-
computer on the Digital Board
20
HostdI2cNvram
Checks the data line (SDA) and the clock line
(SCL) of the I2C bus between the host decoder
and NVRAM
19
SAA7118I2c
Checks the interface between the Host I2C con-
troller and the SAA7118 Video Input Processor
Automatic Self Diagnostic Modes
(End User/Dealer Script Interface)
18
VideoEncI2c
Checks the interface between the host I2C con-
troller and Empress
17
AudioEncI2c
Checks the I2C connection between the host
decoder and Empress
16
AudioEncAccess
Tests the HIO8 interface lines between the host
decoder and the audio encoder
15
AudioEncSramAccess
Checks the access of the SRAM by the audio
encoder (address and data lines).
14
AudioEncSramWrR
Tests the SRAM connected to the audio encoder
13
AudioEncInterrupt
Tests the interrupt line between the host decoder
and the audio encoder
12
VsmAccess
Checks whether the VSM interrupt controllers
and DRAM are accessible
11
VsmInterrupt
Checks both interrupt lines between the VSM
and the host decoder
10
VsmSdramWrR
Tests the entire SDRAM of the VSM
9