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ms660 · 27th Jul 2019, 7:52 pm

Connect a resistor of say 82 or 100 ohms between the emitter of T10 and ground making sure the bulbs are not in circuit, then do T10 voltage checks when mains powered and switched on with the bulb switch on (contacts 5&6 making) and then with the bulb switch off (contacts 4&5 making) then do the same on battery power, that will tell you what's what in that department.

Lawrence.

27th Jul 2019, 7:52 pm	#50
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Uher CR240 Troubleshooting Best Practice Connect a resistor of say 82 or 100 ohms between the emitter of T10 and ground making sure the bulbs are not in circuit, then do T10 voltage checks when mains powered and switched on with the bulb switch on (contacts 5&6 making) and then with the bulb switch off (contacts 4&5 making) then do the same on battery power, that will tell you what's what in that department. Lawrence. Last edited by ms660; 27th Jul 2019 at 7:58 pm.