Search results

I replaced C6, and we have some complex waveforms appearing on J7 pin 1. They are pretty dense. Here is an image: 2V/Div 1us Looks like Video is up (from the converter)

Starting at J7 P1: 5V (Flat) E9 P6: 5V (Flat) E9 P2: .2V (Flat) C6 P8: .2V (Flat) C6 P9: 5V (Flat) B6 P3: 4.85V (Flat) B6 P8: 4.8V (Flat) C6 P10: 5V (Flat) B6 P5: 5V (Flat) B6 P4: 5V (Flat) http://wbochar.com/downloads/320132-3-WB-VIDEO2.jpg Here is the high res one.. linked from my server.

Replaced, Getting signals on all pins. D9-PIN8 D9-PIN9 D9-PIN10 D9-PIN11

I replaced the J8 Connector and Socket to the board. Things look better. My DSO Scope is working after a small fix to the tuning section and a re calibration. There is no AC on the DC lines J8 PIN2&4. Voltage Regulator Outputs: Row A : 4.93 VDC Row C: 5.0 VDC Row D: 4.93 VDC Row F: 4.93 VDC...

Well I thought the power was acting kind of weird. So I mapped out the transformer up. I removed the extra power connections as well. If they are beefing something, it might mean there was a problem with something else. The plastic connector for the cable going into J8 has seen some heat, there...

I'll try to scrape up a 465, I've a 475 availabel recently for around 200$. On other news. I was looking at other pics of boards, similar to mine. I noticed a difference. Whoever had it before wired extra lines to the mainboard.. Next, I spent some time looking at all the power supply...

I started smelling burning plastic from the tube section. I powered down the machine and noticed one of the wires going into the back of the tube had begun to melt its plastic coating off. Here is a pic: What to do now? Beyond killing myself with the tube. :P

C9-PIN14 Zero Volts for C9 PIN 12 BTW / Thanks for the help in all this :) --Wolf

B5-pin 9 125 KHz C8-pin 6

E2-pin 6 8 MHz C9-pin11 1 MHz C9-pin12 500 KHz B5-pin14 500 KHz B5-pin12 250 KHz

C5 PIN 1 C5 PIN 4 C5 PIN 12 Can I test the flip flop with the pet off, using some external power and pulse generator?

This is what I get on C5 Pin 2, similar results appear on Pin 4. I powered up the machine and monitored the pin's with each power cycle. I attached the monitor cable and removed it to see if that affected the results. Same. I also noticed something weird, I hooked up my C2N to a C64, recorded...

I've got a PET that was really in bad shape (bird nest and all), he was in storage for a while and last week I pulled him out to work on him. He worked fine for a few days, the first thing was getting the RAM to work properly -- there was few bad chips. Testing was swapping around till I got...