Service Modes, Error Codes And Fault Finding; Elantec - Philips VAD8041 Service Manual

EN 8 5. VAD8041

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
Following table gives the output format of this nucleus.
Bit
7
Byte
0
1
2
Service Modes, Error Codes and Fault Finding
the OPU
6 5
Reserved
Reserved
Reserved
*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.
Figure 5-2 Self test Results
4 3
tray*
real dsp* hdr80 cheetah
eeprom
eeprom
checksum*
2 1 0
laser forward
ttm* pcs*
sense
laconic elantec
eeprom empty* iic