[Premium-Rx] Manual for a Wiltron 5411

[NewRadioChap at aol.com]

Greetings.
This is a bit off-beam - but is radio related, so I hope you guys don't mind.
Does anyone have a copy of the service/repair manual for the Wiltron Analyser 
model 5411? My unit works fine, but it has developed an unusual fault 
recently. The display won't work properly until it has been switched on for 
20 mins - it produces incorrect/corrupted characters - sometimes none at all. 
After the 20 min warm-up, I switch it on - and hey presto... It will always 
work straight away when switched on after the 20 min warm-up.
Help.... and thanks to you all.  Tom
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