820-00165 no water damage. No light on MG, no fan spin, all coils 0V

MaxFix

Member
Hi there,

no water damage. No light on MG (1 out of 10 i get orange light that fades out), no fan spin, all coils 0V. Tested with good working io board and cable.
Please advice how to proceed.

Thanks!
 

2informaticos

Administrator
Staff member
Post PPBUS_G3H and 3V42_G3H.
If no voltage, post diode mode too.

Keep connected only DC cable, leave out LIO flex.
 

MaxFix

Member
No voltage on both PPBUS_G3H and 3V42_G3H. without LIO flex only with DC cable.
PPBUS_G3H - 137 in diode mode
3V42_G3H - 328 in diode mode
 

2informaticos

Administrator
Staff member
Now post PPDCIN_G3H.
If no voltage, post exact R7012 value; measured onboard, ohm scale.
Check if D7012 is not open, or shorted.
 

MaxFix

Member
PPDCIN_G3H at J7000 - jumping between 16.51 - 16.68V
R7012 measured onboard - 56.2k
D7012 - not open. Tested in continuity mode between R7012 pin 2 to R7010 pin 2.
BUT with my sharp eagle eye I saw that pin 2 of D7012 had the smallest oxidation I have ever seen. Replaced it and machine works again.
Thanks for your help!
 
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