gfosterCA
Member
Last Activity: 04-24-2024, 07:30 AM
Joined: 12-22-2019
Location: Ottawa, ON
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That's a very good point. Just went through my stack of boards and can't find a suitable donor. I've removed PU501, and am only detecting ground on the expected pads. Seems promising at least.... -
Acer Aspire 5 N20C5 - no power, not charging. Motherboard FH5AT LA-K091P
Good afternoon all.
After verifying 19V source and testing for short on the DC charge jack, kept hunting..
Pin 5 of PQB3 shows 19V.
Pin 4 of PQB3 seems to from 0.3V down to 0, and repeat.
Pin 1-3 of PQB3 sit around 0.03V down to 0.
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Pins 5+ on PQB4 appear to be shorted to ground.
Voltage injection shows inductor PL501 and PU501 getting hot.
For kicks and giggles, removed the inductor PL501, and short at PQB4 is no longer. Would stand to reason that it's on the side of PU501. Side effect: battery... -
paulyboy[USER="306223"]paulyboy[/USER] Did you ever find a substitute for this IC ? (jw5068c)Leave a comment:
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Re: Cummins ISX15 ECM component identification
I believe you are correct in that they are similar (or identical circuits). While this doesn't match the R0499, it does seem to match the physical characteristics of the SMD chip (SMSR040).
@redwire - these set of pins apparently go to a line heater. The current sense monitoring makes sense....Leave a comment:
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Re: Cummins ISX15 ECM component identification
Definitely not a capacitor. Either an SMD resistor or a fuse.Leave a comment:
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Re: Cummins ISX15 ECM component identification
Resistor. Just unclear I'd this is the same component or same value.Leave a comment:
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Re: Cummins ISX15 ECM component identification
I was thinking fuse, as it's completely open between the plates. As long as this isn't a current sense circuit through a resistor, I confuse it or temporary bridge to test functionality, I agree with your concerns, something either was applied to this line that shouldn't be there or something was accidentally shorted....Leave a comment:
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Cummins ISX15 ECM component identification
Morning all,
Have this ECM, p/n: 5317106 from a heavy truck.
Report was pins 84+85 were not supplying necessary constant ground. Found this traumatized component which is in-line with the GND pins in question. I've located a similar component on-board, but would like to confirm.
Anyone happen to know if references are available, or if someone might have one of these open on a bench?
Could bridge, but suspect this may be for current sensing as well.
Thanks in advance !... -
Marantz SR4023 - stuck in standby
Hi folks.
I've checked KEY1 at the CPU and voltage is dropping as expected when the front panel button is pressed.
I'm unclear as to whether voltage should be present or not on P-FAIL in a good state.
Suggestions on test points for healthy voltage ?
Relay activates manually when DCPS voltage applies. Where is the standby relay activated from in CPU, WAKE ?
Thank you.
Greg. -
Re: Identify Mosfet?
Much appreciated!...Leave a comment:
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Identify Mosfet?
Hi Folks,
Having some issues tracking down the spec sheet on the following, and wondering if someone might know what company stamps "IOR" (If I'm reading it correctly) IOR P209T....
Many thanks.... -
Re: Sharp LC-60LE640U 1 long, 1 short blink
Also to note, it appears that the left hand 6-12" is much dimmer.Leave a comment:
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Re: Sharp LC-60LE640U 1 long, 1 short blink
Sorry for reviving this old thread. I have this exact blink sequence, and powering on with Chan_down+Vol_up does in fact force the set to come online. I can't seem to find the maintenance menu/screen that shows me the lamp failure count, etc. Any pointers?Leave a comment:
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