Remove R7643 too and see if SMC_PM_G2_EN is stable now; keep R7663 removed.
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A1707 not powering on
- Thread starter hgoncalves
- Start date
hgoncalves
Active member
Hello, yes, SMC_PM_G2_EN is stable now. 3.4V
Looks like SMC detects a problem in S5 state and cycles SMC_PM_G2_EN.
Check what happens trying to start in SMC bypass mode.
Check what happens trying to start in SMC bypass mode.
hgoncalves
Active member
I already did it. Nothing appends. it starts with 0.12 A and drops to 0A. them start again... 0.12A and 0A. It keeps trying to boot, I think
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Do you have now stable 3V3_S5/SUS voltages?
With R7643/63 both removed...
With R7643/63 both removed...
hgoncalves
Active member
No I dont't. They keep dropping
Post some U7650 voltages in this case; pins 23, 12, 13, 22, 29.
hgoncalves
Active member
U7650 Voltages:
PIN 12 = fluctuates between 3.4V nd 0V
PIN 13 = fluctuates between 3V and 0V
PIN 22 = 3.297V
PIN 23 = 12.58V
PIN 29 = fluctuates between 3.8V and 0V
PIN 12 = fluctuates between 3.4V nd 0V
PIN 13 = fluctuates between 3V and 0V
PIN 22 = 3.297V
PIN 23 = 12.58V
PIN 29 = fluctuates between 3.8V and 0V
hgoncalves
Active member
Can you help me?
You should have a problem with SMC, or U7800.
Remove R8110 and run a tiny wire from C7653 to C7644.
Se if you get stable 3V3_S5.
If yes, try soldering R7663.
Remove R8110 and run a tiny wire from C7653 to C7644.
Se if you get stable 3V3_S5.
If yes, try soldering R7663.
hgoncalves
Active member
Hi,
just to be sure...
I removed the R8110 and now the 3V3_S5 is 0V.
There is no C7644 (no stuf) and the C7653 is 3.298V.
now, on the pad of the R811, i have 3.4V on SMC_PM_G2_EN and 0V on PM_EM_PVXS5.
Do you still want me to jumper both of them?
just to be sure...
I removed the R8110 and now the 3V3_S5 is 0V.
There is no C7644 (no stuf) and the C7653 is 3.298V.
now, on the pad of the R811, i have 3.4V on SMC_PM_G2_EN and 0V on PM_EM_PVXS5.
Do you still want me to jumper both of them?
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Yes, just for test...
hgoncalves
Active member
OK, but from pin 1 to pin 1 and pin 2 to pin 2 of the C7644 and C7653?
Why do you bother about ground pins?
Don't you have connection there???
Don't you have connection there???
hgoncalves
Active member
It was just to be sure. I want to follow your instructions precisely
You must be able to follow a schematic man.
Use the logic, please.
Use the logic, please.
hgoncalves
Active member
I´ll try it...
After removing C7653 and jumping them both, i have 0V in PP3V3_S5
After removing C7653 and jumping them both, i have 0V in PP3V3_S5
"After removing C7653 "
Why did that???
You just need to remove R8110 and inject P5VP3V3_VREG3 to PM_EN_PVXS5.
Why did that???
You just need to remove R8110 and inject P5VP3V3_VREG3 to PM_EN_PVXS5.
hgoncalves
Active member
Sorry, it was distraction...
After soldering C7653 back, both P5VP3V3_VREG3 and PM_EN_PVXS5 has 3.5V, but PP3V3_S5 has 0V
After soldering C7653 back, both P5VP3V3_VREG3 and PM_EN_PVXS5 has 3.5V, but PP3V3_S5 has 0V
Post again (mentioned) U7650 voltages, in this configuration...