Re: Telequipment S51 - No horizontal sweep
Thank you all for your comments, particularly Ron's kind offer as we are local, but before we get to that point please note the following and see the pdf attachment.
My previous comment about R70 470 ohm was my error and I should have said it was R46 which is about 3K and 0.5 watt.
I have attached ‘Partial Scan_20170519.pdf’ file and made the following observations:
1. Anode Voltages on both V7A and V7B are 320 v
2. Cathode Voltages marked * on both are approx 220 v NOT as per diagram around 30 v. (Valve not conducting??)
3. Resistors R45 and R53 actual values are approx 5K. They have both got so hot that I cannot read the resistor code bands. Circuit says they are 6.8K so close enough?
4. Resistor R46 value is approx 3K and is 0.5 watt rating. This gets very hot!
5. Voltage at junction of these 3 resistors is approx 65 v.
Soldering iron is now at the ready! Alan
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