Hi Vid,

Do we replace the removed chip and capacitor ?

Or do the mosfet mods take care of this?

Thanks!

Hi, thanks for all the guidance in this guide. I have some questions.

I've rebuilt the power supply and checked the outputs/inputs to the cpu. On the 5v circuits good results. On the 3J6 12v output to 1j2, I get 12.6v on the output header pin at the ps board. All good, so I re-connect and check the input voltage at 1J2 and its 10.5v. I trace back to the IDC on 3J6 and at the IDC socket output, the voltage is 10.6v.

Is this a normal drop across the pin/socket of the IDC or should I replace the connector w a new Molex header and socket? And if so, should I replace all the IDCs?

Would the cpu not boot/run or gave issues because of that low voltage input? Just curious there as I am still to update the cpu board to Vid specifications. (Scanbes to replace and combo ROM mod to install).

Thanks!

Hi,

As a BIG BIG newbie, I Have been doing everything mentioned in this guide for my firepower restore.

I put in new sockets. Today I learnt a big lesson that I've not seen mentioned often enough! Never ever install a test rom or chip upside down! The little dot/dimple/divet at the base of the chip must go to the bottom!

Lesson learnt! New test rom ordered!

Vid, thanks again for everything you do in making this guides for us newbies.

I have a similar problem. In checking all the coils on my firepower, I found the left flipper coil reading just 1.0 ohm with the diode disconnected. (The right flipper coil reads 15.8ohms). The flipper diode reads .572 which is less than .6. Does this mean the coil is no good? The driver board flipper control 2N4401 transistor (Q13) reads .646 on the left leg and .637 on the right leg, is this toasted too (it's over.6)? Should I replace the 1N4001 diode (D1) on the driver board flipper control when I do the transistor?

And lastly, When I look at the diodes on both of the flipper coils, the banded end is towards the return wire of the coil. The rest of the coils are band to the power side. Is this correct? Clays guides says that banded end of the diode should be to the power side of the coil. It looks like somebody has done a repair job on the flipper coils previously.

Any advice greatly appreciated!