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MikeG
Joined: 06 May 2008
Posts: 3
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| Posted: May 6, 2008, 3:59 pm Post subject: Diagnostic Tests |
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I have a 4150 and I see lots of references to the factory diagnostic tests, but I haven't seen how to actually do those tests.
Could someone point me in the right direction for the tests for the 4150? |
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vic7767
Joined: 14 Jan 2006
Posts: 3270
Location: Louisiana
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| Posted: May 6, 2008, 4:23 pm Post subject: |
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at the beginning of this forum is a Sticky called "READ THIS FIRST" contained within is the link to what you seek.
http://mysite.verizon.net/gsplews/ |
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MikeG
Joined: 06 May 2008
Posts: 3
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| Posted: May 6, 2008, 5:11 pm Post subject: |
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I apologize! I should have seen that and read it. I have done so now to make sure I have covered my bases.
I ran the diagnostic and it confirmed what I originally suspected. The left wheel does not spin in reverse. Test 9a backed up in a complete clockwise circle. Test 9b showed the CLEAN button lit, but the SPOT button unlit. I picked up the unit a gently turned the left wheel. While I did so, the SPOT button lit up as intended.
Is this a motor issue? It goes forward just fine. |
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vic7767
Joined: 14 Jan 2006
Posts: 3270
Location: Louisiana
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| Posted: May 6, 2008, 5:51 pm Post subject: |
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| You have narrowed it down to the left wheel motor. Use a 9 volt battery and test to see if it is the motor itself or possibly a component failure on your Printed Circut Board. |
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Gordon
Joined: 05 Apr 2005
Posts: 1526
Location: Santa Ynez, CA USA
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| Posted: May 7, 2008, 7:43 am Post subject: |
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MikeG wrote: ...I ran the diagnostic and it confirmed what I originally suspected. The left wheel does not spin in reverse. ...Is this a motor issue? It goes forward just fine. The motor is fine. Test-7 confirmed that. A motor that runs in one direction OK, will run the opposite direction OK.
The fault is on the main_PWB. At least one of the power transistors (that steers current through the motor) has failed OPEN. Search for "hbridge" to learn about this fault's history. |
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MikeG
Joined: 06 May 2008
Posts: 3
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| Posted: May 7, 2008, 10:05 am Post subject: |
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| Thanks Gordon! That tells me everything I need to know! |
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