MEP005A frequency meter not working.

[Guyfang]

Typeo. Should be 120 VAC. The terminals are for 120 AC, they feed the full wave rectifier which energizes K7.

 

[yohanusmarcus]

This is the a5 board itself I'm testing?

 

[Guyfang]

Yep.

 

[yohanusmarcus]

Do I need to leave it connected or test it on the bench

 

[Guyfang]

Bench is good.

 

[yohanusmarcus]

So regardless of the other tests this definitely needs done right.

 

[Guyfang]

Correct. Part of the circuit I showed you, runs through that card.

 

[yohanusmarcus]

Ok

 

[yohanusmarcus]

View attachment 917936
Start here:

1. Remove the jumpwer wire between TB101-3 to TB101-9

2. Oil pressure switch. Take the plug off. Insert a paper clip in pins A&D.
Start the set, and see if the set runs after you let go of S2.

If it runs, you need a oil pressure switch.

If it stops:
3. Hook the oil pressure switch back up.
4. Unhook the Water Temp switch. Insert a paper clip in pins A&D.
5. Start the set, and see if it runs after you let S2 go.

If it runs, you need a Water temp switch.

If it stops, you need to check the A5 card for K8 working correctly.

Turn to page 5-26. in the -34 TM. Read from paragraph #16 to page 5-28, paragraph #19. Its not all that hard. If the board is bad, Member @kloppk makes a replacement board that is nuke proof.

Ok I disconnected the oil sensor

 

[yohanusmarcus]

Disconnected oil switch jumped a to d started machine and it still will not stay running. Question is which is the temp switch also something has been removed

 

[yohanusmarcus]

I have chased the disconnected wires down to the J5 plug pins X and y I think hard to see

 

[Guyfang]

Put J5 back on, and put your jumper in the oil pressure switch cannon plug.

 

[yohanusmarcus]

Did that still won't stay running

 

[yohanusmarcus]

Best I can tell the missing part goes to TB101-18 and TB101-18

 

[Guyfang]

What missinjg part?



3. Hook the oil pressure switch back up.
4. Unhook the Water Temp switch. Insert a paper clip in pins A&D.
5. Start the set, and see if it runs after you let S2 go.

If it runs, you need a Water temp switch.

 

[yohanusmarcus]

The photo just above the one of J5 two wires taped up. The coolant switch only has one wire on it second photograph.

 

[Guyfang]

Thats for the diesel fired heater. Ignore it. Its normal. Never saw one installed in all the years I worked on the set.

 

[yohanusmarcus]

Thats for the diesel fired heater. Ignore it. Its normal. Never saw one installed in all the years I worked on the set.

I thought as much. Am I wrong in seeing the temp sensor bellow the lower radiator hose? There are no other sensors with Canon connectors other than the speed sensor.

 

[peapvp]

I thought as much. Am I wrong in seeing the temp sensor bellow the lower radiator hose? There are no other sensors with Canon connectors other than the speed sensor.

There is a temperature sensor connected to the temperature gauge on the front panel.
Then there is a temperature switch which has two wires.

 

[yohanusmarcus]

There is a temperature sensor connected to the temperature gauge on the front panel.
Then there is a temperature switch which has two wires.

I can't find it then. Is it on the motor or elsewhere?