Looking for this schematic
Thanks in advanced who ever has uploads this.
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
Lenovo AIO A540-24API AM4SL Rev 1.0
-
Re: Eeprom dump thread!
Anyone got the eeprom dump for mainboard 40-nt67ES-mac4hg?
-
Re: Jbl prx515
It was a dry solder Joint on the transformer, I touched up all the joints around this area including smd components.
I discovered if i pushed on u7 it would start again didn't need the freeze spray at all.
its working and not cutting out anymore.
I should of done this sooner as its been in my road for awhile now....
Leave a comment:
-
Re: Jbl prx515
Here is the schematic for a similar model prx518...
Leave a comment:
-
Re: Jbl prx515
I have found a similar schematic for a the JBL PRX 518
In the schematic RT2 is meant to be 20kohms
RT2 = 15kohms
while this is on spraying RT2 with freeze spray outputs the sound again.
Question I have is this RT2 bad?
Leave a comment:
-
Jbl prx515
I have a JBL speaker unit that all of a sudden is not outputting after a few minutes with sound.
This one has me baffled.
Anyone have a schematic also?
Freezing in a certain area of the board does this make this come on. not sure if this is a overheating issue or a badsolder joint or some other component.
-
Re: Panasonic SA-MAX770 (not turning on)
probably a bit late of a reply but this was solved by replacing all listed chips.
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
I took them all off in order so no way of knowing if they were bad, is it possible for them Frist lines to be short to ground and be still be fine with ic4803 removed.
I think I'll replace all just to be sure than wait another two weeks for chips to get here.
Not sure what could of caused this fault.
I need to read up on the Yamaha chip
You could see some discolouration around the edge of the chip looks like it got very hot at one stage.
Excuse me if this post is not formatted...
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
Thank you RJ for getting me this far....
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
found the shorts.
So have a short on IC8005
injected some voltage to find him.
Then injected some voltage to the SW pin 10 of that IC8005 as there was a short on that line which lead me to a short IC8003 removed all these off the board.
then found the sw pin short on IC8003 so I injected voltage and found that ic4803 was getting hot.
removed IC4803 and short was gone.
Now IC4803 was not on the schematics we have here I have found that version and I will upload here with this post.
...Last edited by Amraks; 10-06-2022, 01:02 AM.
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
with everything disconnected I have measured the mainboards pcont.
it is measuring short to ground.
I have checked IC8007 pin5(en) to ground and its reading short to ground.
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
Ok there is no power on VCC of IC1501.
Confirmed using ZA1101 heatsink as the ground.
And there is no voltage on Pcont.
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
Pin 1 has no voltage.
correct me if I am wrong but isn't PCONT just going to ground?
Also I have been using wrong ground to measure Vsen using the right ground i get 3.3v...
Leave a comment:
-
Re: Panasonic SA-MAX770 (not turning on)
resistance to ground looks good nothing shorted out there.
measuring voltage at Vsen on pin 2 of ic1501
Is 1.5v could R1501 to R1504 be bad.
I believe this is meant to be 3.5v
Leave a comment:
-
Panasonic SA-MAX770 (not turning on)
Hey all its been awhile since I have needed to post here.
Panasonic - SA-MAX770: Symptoms not turning on
Power Supply
C1403 has 330v
IC1402 Looks perfectly fine no blown out holes.
C1601 has 3.3v
CN1851 Has its 3.3v but no 15v all I am getting is on the 14v rail is 0.400v
Not sure where I should be looking next for this any help would be appreciated...
-
Re: A1278 820-2936-B Missing PP5V_SUS
I have solved this problem it was under PCH I pushed some flux under chip and heated with hot air at 200c.
Then flooded under chip with alcohol and went back over with hot air.
I had given up on fan spin and left it connected while I stepped out to the shop only to find it was still hot when I got back so I disconnected it and connected fan then had the fan spin.
Reassembled laptop and it's fixed. Not sure how long or what was going on with PCH chip, laptop has been refurbished apparently so who knows what's...Last edited by Amraks; 04-22-2022, 11:08 PM.
Leave a comment:
-
Re: A1278 820-2936-B Missing PP5V_SUS
Resistance
pm_slp_sus_l is 94.5k
Leave a comment:
-
A1278 820-2936-B Missing PP5V_SUS
All important voltages are there
So noticed I have no voltage here
PM_SLP_SUS_L 0.00v
and have voltage here I understand this is a operator value for u7040 and PM_SLP_SUS needs voltage to turn on.
SMC_BATLOW_L 3.30v
These are voltages measurements I have taken I am unsure if this is a problem with PCH or SMC
SYSCLK CLK32K RTC 0.81
RTC RESET L 3.30v
PHC SRTCRST L 3.30v
PCH INTRUDER L 3.015v
PCH INTVRMEN L 3.22
PPVRTC_G3H 3.3v
RTC_RESET_L 3.30v
PCH_SRTCRST_L 3.30v
PCH_INTVRMEN_L...Last edited by Amraks; 04-04-2022, 09:20 PM.
-
Re: LG 42PJ350 Click Click Clicking
Replace all I labelled these go faulty under load.
Then take the bridge out tv should stay on
Leave a comment:
-
Re: LG 42PJ350 Click Click Clicking
Did you replace them resistors?
The only reason I did this was to test the the voltage drop on the resistors .
Then i replaced resistors.
Leave a comment:
No activity results to display
Show More
Leave a comment: