Service Modes, Error Codes and Fault Finding
EN 8 VAD80415.
5. Service Modes, Error Codes and Fault Finding
5.1 General
Please refer to the service manual of the recorder for a
description of the complete Diagnostics Software. In this
manual only drive specific error codes are explained.
5.2 Self test
A power on self-test is incorporated in the software of this drive.
With DSW command 902 (Chrysalis Mpeg Codec) the set
software can retrieve the result of the self-test.
Figure 5-1 Example, nucleus 902 showing no communication with
the OPU
Following table gives the output format of this nucleus.
Figure 5-2 Self test Results
Bit
Byte
0 tray* ttm* pcs*
laser forward
sense
1 real dsp* hdr80 cheetah laconic elantec
2 eeprom
eeprom
checksum*
eeprom empty* iic
*error code not detected in VAD8031/VAD8041
Forward Sense Tests if the forward sense value measured during drive startup is within normal range
HDR80 Performs a read/write test on a register (HDR 80 is an internal module of Centaurus)
Cheetah Performs a read/write test on a register
Laconic Read the IC version (fixed) and checks if it's ok
Elantec Performs a read/write test on a register
Eeprom Performs a read/write test on an address
I2C Tries addressing all I2C devices in the system - if one fails, this test fails
Please note that if the I2C test fails, most other IC tests will fail as well.
3210
Reserved
Reserved
Reserved
7654
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