Re: Logitech Z906 Power Supply

Do not replace D22 if it's not shorted and shows conduction one way only (around 450mV measured on diode range). Replace R29 and R45 2Ω resistors, R24 510Ω resistor (they are quite often burnt if Q1 and Q2 are shorted), five 0.330Ω/1206 resistors in parallel, Q1+Q2 and both 2.5A fuses. You may also need to replace the SL12 NTC thermistor as it is sometimes also affected on these PSU boards (you can see a burnt hole on its surface if damaged). The value of NTC is 10Ω. In some cases U1 is affected too and the PNP transistor next to...

Re: Dell Latitude 5410/5510 LA-J371P Broadview / Schematics

Kd*** is confirmed as SY83[b]88[/b]RHC, please check this thread [url]https://www.elvikom.pl/prosba-o-dobranie-zamiennika-sy8388rhc-t70180.html[/url] and this one [url]http://www.tecnologos.net/viewtopic.php?t=5635[/url]
eH*** then seems to be SY83[b]86[/b]RHC.Re: Dell Latitude 5410/5510 LA-J371P Broadview / Schematics

Kd*** is confirmed as SY83[b]88[/b]RHC, please check this thread [url]https://www.elvikom.pl/prosba-o-dobranie-zamiennika-sy8388rhc-t70180.html[/url] and this one [url]http://www.tecnologos.net/viewtopic.php?t=5635[/url]

Re: HP motherboard 3Volts overheating - hp 14-bp019nf


You probably have an LDO pin 17 shorted to ground by one of the bunch of components connected to that +3VPCU power rails, most likely this will be EC (IT8987). Measure the resistance to ground on +3VPCU LDO output pin 17 of SY8286B, and if it's low in Ohms, perform a short test on this pin. Read this trainings as it contains a lot of knowledge and helps to understand how to do the short test and what to expect [url]https://www.elvikom.pl/szkolenie-nr-1-podstawy-diagnostyki-plyt-glownych-laptopow-t986.html[/url]
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Re: Richtek rt8249c equivalent !



Not an equivalent - RT8249C has pin 19 as SKIPSEL (PWM Operating Mode Selection) and TPS51225C has pin 19 as VCLK (Charge Pump Output Clock). TPS51225C is only an equivalent to RT8249A/B and RT6585A/B. It is however possible to use TPS51225C in place of RT8249C but it is required to cut off pad 19 underneath the IC to separate the circuit from pin 19....

Re: ASUS X541NA rev. 2.1 need schematic / boardview



Not an x541na rev 2.1 boardview, does not match the board....

Re: LA-B843P Schematic



not compal la-b843p schema but some wistron mixed schema, need la-b843p compal schema...

Re: LA-B843P Schematic

available here, [url]https://***************/schemat-dell-inspiron-15-5558-compal-aal10-la-b843p-t53670.html#p238987[/url] plz download and shareRe: LA-B843P Schematic<br /> <br />...load and shareRe: LA-B843P Schematic

available here, [url]https://***************/schemat-dell-inspiron-15-5558-compal-aal10-la-b843p-t53670.html#p238987[/url] plz download and share...