Re: Repairing a Tektronix 2445B ... (ARG)
|
Power supply voltages are very important. I would recommend disassembly of scope and remove PS as a unit. Pay very close attention to the wiring connections. Then separate the inverter and regulator boards. Start replacing the electrolytic capacitors. C1220,C1240,C1260,C1280,C1300,C1330,C1350 on the regulator board.
toggle quoted message
Show quoted text
Then C1111,C1110,C1102,C1101, C1113,C1116,C1114,C1115,C1132,,C1120,C1130, C1072,C1066.on the inverter board. You will definitely need service manual to ID these parts. Match the cap¡¯s with high quality Nichicon brand. 105c temp range and if exact values cannot be obtained you can up the microfarad value up 5% and you can double the voltage rating. Removal and replacement is very difficult if you don¡¯t have the proper solder/desolder unit. Don¡¯t overheat the circuit board. Craig On Mar 30, 2018, at 1:42 PM, fgswww@... wrote: |
Craig Cramb