Sony TRINITRON KV-32FX20A Service Manual page 8

General IIC Device Run-time Errors (Errors 19-23):
NVM
19
20
21
22
23
If any of these errors are detected, the respective NVM register will be incremented and the software will carry on.
Compact Text Run-time Errors (Errors 26, 28, 33 & 34):
NVM
26
28
33
In the case of these errors, the 'device reset' pin will be held low for 60ms, causing a hardware reset of Compact Text. Following this reset, a
longer timeout will be allowed for the M3L bus to recover. If the error still exists, the NVM register will be incremented and the software will carry
on.
NVM
34
In the case, the 'device reset' pin will be held low for 60ms, causing a hardware reset of Compact Text. Compact Text will then be re-initialised and
the NVM counter updated. This is the same as for errors 26, 28 and 33 except that the M3L bus timeout is not changed.
MSP and DSP Run-time Errors (Errors 24 & 25):
NVM
24
25
For both these errors, the software will refresh the MSP and DSP registers. If the errors still exist, the NVM counter will be incremented, and the
software will carry on.
Error Description
No acknowledge from Jungle when attempting to initialise.
No acknowledge from Jungle when attempting to read registers.
AV Switch cannot complete reset during initialisation.
No acknowledge from AV Switch when attempting to read registers.
No acknowledge from NVM when attempting to read or write.
Error Description
M3L_TXD pin low when checking register 81 (implies that no communication was
possible).
M3L_TXD pin low when attempting to initialise (implies that no communication was
possible).
Compact Text RAM test failed during initialisation of devices.
Error Description
Register 81 check fail, but M3L_TXD pin high (implies that Compact Text has either
reset or become corrupted).
Error Description
Error 24 can be caused by any of the following :
- After MSP initialisation, Scart Prescale Register check fail (implies that the MSP
has either reset or become corrupted).
- MSP fails to acknowledge reset instruction.
- Scart Prescale Register check fail (implies that the MSP has either reset or
become corrupted).
- DSP test byte corrupted (implies that the MSP has either reset or become
corrupted).
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