HP 15-dw3019 Power-On only if battery inserted please help
Bios Programmed
kbc programmed
[MOD EDIT] Link to Schematic -> https://www.badcaps.net/forum/troubl...gpt52-la-k201p
kbc programmed
[MOD EDIT] Link to Schematic -> https://www.badcaps.net/forum/troubl...gpt52-la-k201p
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measure of main rail when attached battery/charger/both ? -
Powers on only battery power?
If adapter only is connected-what happens? Consumption on dc supply on off mode in adapter only? IS there any change in load once switch is pressed?
What happens when both adapter+battery is connected? Does it charge?
Look for AD_ID/ACDET/ACOK to begin with.Comment
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Adapter only :
ADP_ID = 3.210v
ACDET = 2.939v
VCIN1_ACOK = 2.272v
+5VALWP = 5.16V for 3sec and 0v after
+3VALWP = 3.378V for 3sec and 0v after
SPOK = 0V
Battery only :
ADP_ID = 0v
ACDET = 0v
VCIN1_ACOK = 0.4mV
+5VALWP = 2.4mV
+3VALWP = 0V
SPOK = 0V
Adapter and Battery :
ADP_ID = 3.204v
ACDET = 2.916v
VCIN1_ACOK = 3.287v
+5VALWP = 5.16V
+3VALWP = 3.378V
SPOK = 3.312VComment
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Replace the charging ic.Comment
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Is VCIN1_ACOK = 2.272v correct? Measure the voltage to ground of the +3VL rail.Adapter only :
ADP_ID = 3.210v
ACDET = 2.939v
VCIN1_ACOK = 2.272v
+5VALWP = 5.16V for 3sec and 0v after
+3VALWP = 3.378V for 3sec and 0v after
SPOK = 0V
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sorry for the delay, by mistake I touched both terminals "VCIN1_ACOK" and "ACP", now i have :
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
Adapter only :
ADP_ID = 3.210v
ACDET = 2.939v
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
Battery only :
ADP_ID = 0v
ACDET = 0v
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
Adapter and Battery :
ADP_ID = 3.204v
ACDET = 2.916v
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
"PUB1" Replaced and same voltage .Comment
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Update : +5VALWP, +3VALWP and SPOK (Shorted to GND only if the charger is plugged-in, Otherwise 0v no and no short.Comment
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The resistance must NOT be checked with power to the board. Confirm this detail. No power / no battery if measuring in resistance or DIODE mode on the meter.Shorted to GND only if the charger is plugged-inComment
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Thanks you for the reply,
No power / no battery :
The resistance in "VCIN1_ACOK" is "4.9 Ω", and in DIOD mode "0.001"
+5VALWP DIODE = 0L
+3VALWP DIODE = 0.477, RES=17.22kΩComment
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That is a dead short on VCIN1_ACOK. Remove the solder blob @ R45. Do you still have this low resistance to ground? If yes, remove PRB8. Do not lose this part. Still have a short to ground. Double check the charger IC soldering.Comment
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R45 must be isolated to determine if the EC is shorted. Is R45 a blob or a trace that can be cut temporarily?
Then test which side of the removed / cut R45 the short lies. If the EC side then the EC is defective.
Comment
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Yes, it is possible that R45 is empty but is there a PCB trace that is shorting the R45 part location? This trace must be cut so that there is no connection to EC pin # 110. Can you post a pic of this R45 location?
If this R45 location is cut and the trace is isolated, then which side of this trace is shorted? Check the resistance to ground on the side that is EC pin # 110. What is the measurement?
Repeat for the other side of R45 PCB pad. What is the measurement?Comment
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Correct. There is the wide blue solder mask covered PCB trace that is acting like a short across the R45 pads. You will need to take a sharp knife and cut this PCB pad trace. Only this area. Then the R45 trace will be isolated. One side to the EC and the other side to the rest of this circuit.
Once you do this, measure the resistance to ground again on each of these R45 pads. If the side to the EC is 4R7 then the EC is damaged. If the other side, we need to keep hunting.
Afterwards, you can apply a blob of solder to bridge these PCB pads @ R45. Or a small piece of wire or a low ohm resistor like 0 ohms; 33 ohms, etc.
See my yellow hand drawn artwork. Be careful to not scrape the tiny black resistor above this trace. Do not have any coffee before attempting this cut. If any doubts, stop and practice on a donor board before performing this surgery.
Comment
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Correct, the side to the EC is 4R7, now what the solution ?Correct. There is the wide blue solder mask covered PCB trace that is acting like a short across the R45 pads. You will need to take a sharp knife and cut this PCB pad trace. Only this area. Then the R45 trace will be isolated. One side to the EC and the other side to the rest of this circuit.
Once you do this, measure the resistance to ground again on each of these R45 pads. If the side to the EC is 4R7 then the EC is damaged. If the other side, we need to keep hunting.
Afterwards, you can apply a blob of solder to bridge these PCB pads @ R45. Or a small piece of wire or a low ohm resistor like 0 ohms; 33 ohms, etc.
See my yellow hand drawn artwork. Be careful to not scrape the tiny black resistor above this trace. Do not have any coffee before attempting this cut. If any doubts, stop and practice on a donor board before performing this surgery.
Comment
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Hello everyone,
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Tests already made:
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NVDC charger configuration...11-05-2024, 03:28 PM -
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