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by kiev
Thu Aug 06, 2020 1:47 pm
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

Might as well try to order some new parts while you wait, the ic318 and ic702, maybe even the FET, TR310, unless you are sure it is good. But why not fresh it all up while you are in there, you don't want to have to go back in there again.
by kiev
Thu Aug 06, 2020 1:14 pm
Forum: General / Main Owners Forum
Topic: Reminder of sale posting
Replies: 2
Views: 445

Re: Reminder of sale posting

oh wow i'm glad you posted up something here, i thought the other post was about buying a chevy, didn't realize it was trying to sell a Mits.
by kiev
Tue Aug 04, 2020 5:31 pm
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

That's what i used. Some of the junctions have wide copper traces and a big thermal mass, and i damaged a few by pulling and forcing them out while there was still too much solder down in the hole. i would have done better to add some flux to those pins, then a hot iron and try to draw the solder up...
by kiev
Tue Aug 04, 2020 4:22 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

There is also an optocoupler pc 314 on the bottom side that sends the signal from ic318 over to the gate driver ic702, but the waffle plate probably covers it from probing. Several small resistors on top side near corner of transformer are the voltage divider for ic318.
by kiev
Mon Aug 03, 2020 4:44 pm
Forum: Batteries and Battery Management
Topic: Help with problems with the 12 v battery
Replies: 15
Views: 2367

Re: Help with problems with the 12 v battery

It's in the bottom side plenum of the OBC; the upper side is the HV battery charrger and the lower plenum is the DC/DC converter used to charge the LV Aux battery. There may be a photo posted in one of the threads here, but not sure exactly where just now. found it posted by skylogger here: http://m...
by kiev
Mon Aug 03, 2020 4:36 pm
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

That is not likely the problem-- it is not getting any voltage thru the transformer and your test just verified it from another direction. you could test it on the board with a current limited power supply, just put 6 volts on the input and should see 5 on the output, but IC702 (on bottom side) prov...
by kiev
Mon Aug 03, 2020 11:14 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

i have to run right now, but i think this is it:

NCP4641 is a CMOS 150 mA linear voltage regulator with high input voltage and ultra−low supply current.
by kiev
Mon Aug 03, 2020 9:51 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

skylogger was measuring the same ~12V across the FET with a voltmeter and used a scope to see it actually chopping. But your reading on the PC312, an A782T isolation amplifier with separate power supplies on the input and output stages, indicates that the supply for Vdd1 at pin 1 is not being create...
by kiev
Sun Aug 02, 2020 9:27 am
Forum: Instruments - Radio/USB/Nav - CAN - Climate Controls - Remote
Topic: What is needed amount of coolant for conditioner?
Replies: 5
Views: 541

Re: What is needed amount of coolant for conditioner?

There should be a little yellow tag along the upper edge of the hood opening that lists the A/C specs. Mine has this info: Charge HFC-134a 11.5 oz (0.325kg) Lubricant MA68EV There is also some instructions molded into the plastic of the air duct to the left of the battery that says to access the cha...
by kiev
Sun Aug 02, 2020 8:23 am
Forum: Batteries and Battery Management
Topic: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter
Replies: 538
Views: 173518

Re: Troubleshooting and repair for On-board Charger (OBC), DC-DC Converter

I just checked this circuit and there is a problem there. There is no voltage across C845 present! The voltage enters with about 12 V the connector and gets to TR310. Between the drain of TR310 and the connector ground are still 12V. Is it possible, that T302 is the problem? i suppose the transform...

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