Looking for schematics 17819-2 for ENVY x360 -15-bp103nx
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Re: Looking for HP schematic 17819-2 HP 15-bp103nx
Still looking for the schematic.
Is there may be a schematic of a previous version of this board that can be used as a starting point? This is an i7 8550.
Thank youAttached Files -
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Re: Looking for HP schematic 17819-2 HP 15-bp103nx
Just had one of these in today completely dead. Some notes for future ref.
Charger section is nowhere near where DC jack connects (DCIN1). Current sense resistors are on the other side of the board below the GPU.
PR4402 seems to be the main CSR for the system, PR4417 the CSR for the battery.
Charger IC (PU4404) is BQ737, ACFET/RBFET are PU4406/4407 (AON7403), BATFET is PU4408 (AON7403). Charger FET's are PU4409/4410 (AON7410).
PL4501 - +3.3V
PL4502 - +5V
PL4001 - 13V (Battery)
PL5101 - 1.2V (RAM)
PL5201 - 1.0V (PCH)
PL5001 - 0.9V (System Agent?)
PL4701/PL4702 - ~0.4V (Vcore)
PL4801 - 0V (CPU graphics?)
PL8601 - 0V (GPU)
PL8501/8502 - 0V (GPU)
So two faults on this one. Shorted main rail was PC5101. Replaced with a 22uf 0805 as a guess since it's decoupling the rail for 1.2V RAM supply (too much is better than too little). Then found PU4406 shorted as well. AON7403 seems a bit underrated to me for a laptop with discrete GPU and pulls 4.6 amps. Uprated this to an AON7405 which I had in stock.Comment
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Laptop Question
Hello,
I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).
A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when... -
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I have a tripp-lite aspint 3636vr inverter charger which blow some of mosfet transistors. I replaced them repaired also the driver circuit and tested but the mosfets burn again.
It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a...03-06-2023, 07:07 AM -
The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration...11-05-2024, 03:28 PM -
I have an RC radio handset(Taranis QX7) which doesn't have internal battery charger which means I had to remove the battery every time I needed to charge it.
So to improve it, I added a 15W USB-C charger board(link) inside and soldered it to the same connector on the PCB where the battery plugs into, great, now I can simply charge it with a USB-C cable.
but the problem I found is that after the radio sat for two weeks without being used the 2S 18650 battery that I'm using was at 4.2V!
So the battery is backfeeding the charger and being drained.
How can I prevent...
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