Author Topic: Sony Vaio Intermittent Power (Read 1003 times)

xtiansy · « **on:** August 25, 2011, 04:07:13 AM »

Sony Vaio Intermittent Power

I'm working on a laptop motherboard for 3 days now. The hardest issue for me would be the ever clueless intermittent issue on these.

Minsan magppower-up, minsan hindi. kahit walang battery laptop intermittent pa rin ang power. minsan umiilaw yung charging LED pero hindi nagchcharge. nacheck na ng laptop technician, motherboard daw sira.

dinala ko sa workshop ko. checked power adapter several times for broken line, wala naman. consistent ang 19.5vdc sa output jack kahit galaw galawin yung wires.

binuksan ko, kinalas lahat ng parts. iniwan ko processor/fan, ram at switch. ayaw pa din. minsan meron tapos namamatay din. LABO!

nilinis ko board using high rpm blower and brush. checked power port ng mobo, nakahiwalay at may wire papunta sa mobo with 4pin terminal ++--. checked kung may kuryente yung 4pins, ok naman kahit galaw galawin pa.

blew hot air over the board back to back 4/4 setting, no go.

desoldered a mosfet malapit sa main battery terminal ng board. http://www.alldatasheet.com/datasheet-pdf/pdf/54668/FAIRCHILD/SI4835DY.html

tinest ko with datasheet, ok naman.

binalik ko:

sorry ang liit hirap ibalik. haha!

suspect ko dito si PWM chip. mukang mahirap palitan daming paa.

meron mga transistors malapit sa battery terminal tinatamad pa ako itest ng nakadesolder, wala ako tiwala sa preliminary tests ko while nakadikit pa sa board.

here are some pictures:

Philippine Electronics Forum · « **on:** August 25, 2011, 04:07:13 AM »

x13r_kit_0 · « **Reply #1 on:** August 25, 2011, 09:18:01 AM »

anung model/series ito sis?

Philippine Electronics Forum · « **Reply #1 on:** August 25, 2011, 09:18:01 AM »

acer · « **Reply #2 on:** August 25, 2011, 09:26:02 AM »

abang lang ako

Philippine Electronics Forum · « **Reply #2 on:** August 25, 2011, 09:26:02 AM »

xtiansy · « **Reply #3 on:** August 25, 2011, 12:23:20 PM »

PCG-series po.

Philippine Electronics Forum · « **Reply #3 on:** August 25, 2011, 12:23:20 PM »

xtiansy · « **Reply #4 on:** August 25, 2011, 06:50:07 PM »

sino ba malapit dito sa heart center? mahirap magbrainstorm pagmagisa ka lang. haha! ambon lang nakukuha ko.

Philippine Electronics Forum · « **Reply #4 on:** August 25, 2011, 06:50:07 PM »

xtiansy · « **Reply #5 on:** August 25, 2011, 08:49:06 PM »

update!

ok na siya so far after removing a surface mount capacitor. tsinaga ko itest lahat ng ecaps at meron sumablay malapit sa power circuit. at ito pa ang pinakamahabang capacitor at di ko pinapansin sa loob ng 3 araw. hahaha!

wala siya sa mga pinost kong pictures. isolated siya malayo nasa gilid na malapit sa fan.

nagchcharge na rin yung battery!

wOOt!

testing muna...

comtronixs · « **Reply #6 on:** October 14, 2011, 03:00:23 PM »

papost naman ng picture for future reference

pEN DoTA · « **Reply #7 on:** October 14, 2011, 06:32:50 PM »

ok na po ba? ecap lng ba? anung value?

neutron · « **Reply #8 on:** October 15, 2011, 12:32:53 AM »

if you search the net ang daming Sony na notebook na ganito ang problem at isa na yung aking 15" na PCG-RX1 yata yun.

either cold solder sa ram/ cpu socket or mobo ang problema, until now dipa rin nagawa yung akin

bigla nalang ayaw mag boot yung sa akin pero pag ni press mo yung power button iilaw yung 3 LED nya sa taas

eto pala yung link,nag post na din ako dyan

http://www.hardwareanalysis.com/content/topic/11258/?o=80

??? · « **Reply #9 on:** October 15, 2011, 12:42:33 AM »

Makikiabang sa bagong kaalaman. Baka meron magbigay dito na same ng problema sakin malay na lang natin yan lang pala ang aalisin.

neutron · « **Reply #10 on:** October 15, 2011, 12:45:15 AM »

...ang tiyaga talaga ng pinoy, sa ibang bansa e tapon na yan

??? · « **Reply #11 on:** October 15, 2011, 01:04:20 AM »

Mahal satin ang sony 80kup siguro.

noman75 · « **Reply #12 on:** October 18, 2011, 02:24:54 PM »

makiabang din ako nito,,
sana maipost ni TS ung pict ng salarin para sa future reference din natin....

your most RIDICULOUS man :) · « **Reply #13 on:** October 28, 2011, 01:47:27 AM »

xtiansy · « **Reply #14 on:** November 09, 2011, 04:45:05 PM »

sorry hindi ko pala naupdate to.

sony vaio pala hindi talaga umaandar pagwalang battery...weird.

pinagawa na lang sa sony.

sira yung charging ic sa board wala ako makitang replacement.

nucleus · « **Reply #15 on:** November 09, 2011, 04:51:30 PM »

baka kelangan lang ireheat yung charge controller kasi intermittent ang issue, and yung mosfet, sana hotair na lang din ginamit para maibalik

xtiansy · « **Reply #16 on:** November 09, 2011, 05:30:08 PM »

nahot air ko na sir ganun pa din. nilabhan ko na din kasama si joy.

nucleus · « **Reply #17 on:** November 09, 2011, 05:52:32 PM »

ahhh, malamang sa loose internal layer ng board iyan at kelangan mo ng jumpering, kaya lang need mo din ng special equipments (x-rays) para malaman kung alin yung mga dapat ijumper kung wala kang diagram

xtiansy · « **Reply #18 on:** November 09, 2011, 06:13:10 PM »

yar.

DJFEL · « **Reply #19 on:** November 09, 2011, 06:15:25 PM »

sub....

Philippine Electronics Forum · « **Reply #19 on:** November 09, 2011, 06:15:25 PM »

Author Topic: Sony Vaio Intermittent Power (Read 1003 times)

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