[TechAssist] RCA chassis MM101GCE, No power up, Low standby voltages

  • From: "Jon Garver" <jongar@xxxxxxxxxxxxx>
  • To: "TechAssist" <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 8 Sep 2003 20:43:27 -0500

Model MM36110

Unit will not power up. It will come on with high voltage
for a split second when the power plug is pulled.

I don't have the manual on this but I do have the power supply
schematic.

The 33V line measures 21.5V
 "  12V   "     "      4.9V
 "   8V   "     "      3.4V
 "   5V   "     "      1.2V

I tried lifting individual the different supply lines to see
if it was being loaded down. Voltages did raise but still not
to where they should be. I checked just about every part in the
primary and secondary. I'm wondering about the SMPS transformer
but have never seen one bad but I know it does happen.

This is my first on these newer MM chassis so any hints or
suggestions are welcomed and appreciated.

Jon Garver 
Heritage Television Service 
Monticello, Indiana
574-583-9681  Voice & FAX
jongar@xxxxxxxxxxxxx  or
heritagetvsvc@xxxxxxxxx

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