UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

jayceebee · 19th Mar 2019, 8:43 pm

Hi Cjacek, that's a good place to start. First of all set the machine to record then measure the voltage at TP1, there should be around 10V DC here. If it's missing check at CN8001 pin4, if there is 12V here then fusible resistor R36 8.2Ω is likely to be o/c. Another fusible to check on this board is R47 82Ω.

If these check ok and the voltage is correct at TP1 in record head over to the main YC18 board and check R43 100Ω.

Good luck.

John.

19th Mar 2019, 8:43 pm	#13
jayceebee Heptode Join Date: Jun 2007 Location: Durham, County Durham, UK. Posts: 640	Re: Old Betamax records audio but no picture Hi Cjacek, that's a good place to start. First of all set the machine to record then measure the voltage at TP1, there should be around 10V DC here. If it's missing check at CN8001 pin4, if there is 12V here then fusible resistor R36 8.2Ω is likely to be o/c. Another fusible to check on this board is R47 82Ω. If these check ok and the voltage is correct at TP1 in record head over to the main YC18 board and check R43 100Ω. Good luck. John.