Re: ACER TIMELINEX 5830TG no led no power alw present
Is normal that the ENE-KB930 is hot with only power adapter plugged?
aniki4177
Member
Last Activity: 04-23-2024, 04:47 AM
Joined: 11-20-2018
Location: turin
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Re: ACER TIMELINEX 5830TG no led no power alw present
ADD
-PSU ONly
-BATT only
-power connector
-protection circuit
I had checked every pin of BQ2472:
-pin 7 according to datasheet "IOUT voltage is 20 timesthe differential
voltage across sense resistor"
maybe is too low?It also connected to protection circuit....Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
Hi to all,
I had removed PR28 and test with PSU+BATTERY.
In attachment the result....Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
ok thank you i read it, i'm beginner in mb repair and i dont know if it must be present in all power condition. I assume that it will be always present.
Is the same thing if I remove pl2 instead of pr28 (only for comodity)?Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
ok thank you, on Monday I'll go to laboratory and take test.
@SMDFlea: ok but normally in only adapter powered, pq10 must be open?What voltage on pin 15?Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
Maybe I don't understand what do you need;
I have already posted pin to pin readings of the fets on post #10 photo:
PQ6 1-3 19V
4 24,7V
6-8 19V
PQ7 1-3 19V
4 24,7V
6-8 19V
PQ9 1-3 2,9V
4 2,9V
5 19V
PQ10 1-3 GND
4 0V
5 2,9V
Only for clarity For B+ side you intend BATT+ line?
Do you know how to work DL_CHG on pin 15 with pq10 mosfet?Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
Hi to all,
according to SMDFlea post ACDRV and BATDRV works good.
-powered with Battery only BATDRV 17V BATT+ 11V
-powered with adapter+battery BATDRV became 11V() BATT+ 11V
I don't understend if or when DL_CHG (pin 15) go up. BATT+ must be always 19V?PQ8 must be close when powered by adapter?
How can I test PU8 in circuit? (it seems always closed).
The 3rd photo on post #8 (PU1_PSU_Only) have wrong value, please refer for this case at post #10; the other 2 are correct.
For read value...Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
In attachmente also the board view file, maybe can help...Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
Ok I noticed that sometimes the 19V goes to 4V and I must disconnect and reconnect charger for correct voltage.
In attachment the power charge circuit with the correct voltage....Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
Hi and thank you for your patience.
In attachment the voltage on pu1 with only adapter connected, only battery and both. In all case DL_CHG on pin 15 that open pq10 mosfet is off....Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
KBC is already powered +3VALW_EC is present. I don't know where are the enabling signal of KBC and at what state of power sequence it will be present.
With the voltage on SPI rom FSEL# SPI_CLK FWR# FRD# seems that is at list partially enabled (but I really don't know if this voltage are correct or if these are input output or bidirectional).
Because of power current are ok and i don't found short don't think that desolder it can help me.Leave a comment:
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Re: ACER TIMELINEX 5830TG no led no power alw present
thank you for reply.
-no charging light
-no visible damage on lvds conn
in attachment voltage of LVDS conn without display connected, and SPI rom (maybe is useful for understand if kbc is good)...Leave a comment:
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ACER TIMELINEX 5830TG no led no power alw present
Hi to all,
I have a problem with a ACER TIMELINEX 5830TG with MB LA-722.
He wont power up and no led are present.
I have found that the battery was 0v and probably put the MB in protection.
MB won't turn on also without the battery unplugged and fan don't spin.
I already change the battery and discharged capacitors hold on the power button for 30sec.
The alw power rail are present and power button work (3,3v to 0v when pressed).
The problem appeared after that I repair the hinges of lcd: I disconnect and reconnect lvd cable with battery plugged;... -
Re: New Members - please post your introductions here
Hi to all,
i'm Andrea from Italy.
I have a laboratory since 2009 and repair laptop and tablet.
I can read a schematics and do welding operation, but I'm in trouble with MB repair diagnostics.
Sorry for my bad english.
thanksLeave a comment:
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