Ls400 Instrument Cluster Circuit Diagram Needed

[BaxFromNZ]

My instrument cluster has gone dead.


Initially it was intermittent but now it is permanent.




This is the last model LS400 with variable valve timing prior to the LS430 so the instruments include a trip computer which my previous 1996 LS400 did not have.




Several kind people have sent me wiring diagrams but what I need is the

circuit diagram of the actual printed circuit boards inside the cluster

as the cluster is currently at an instrument repair shop and they have

hit a brick wall.




There is a main board and one or two daughter boards in the cluster one

of which is the power supply circuit board and this is where I suspect

the fault might be.




If you have access to a diagram or know where I can source one I would really appreciate it.


I have replaced all of the electrolytic capacitors on the main board myself but this did not fix the problem.


I appreciate that Toyota do not normally release this information
because they would prefer to sell me a new one but there are some clever
people amongst you who may have managed to wheedle one out of the
strongroom somehow!