Remove U7100 and check diode mode to ground at pins 2, 19, 20.
If all good, solder new ISL6259A; may need to replace R/D7105 too.
If all good, solder new ISL6259A; may need to replace R/D7105 too.
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820-3476 PPBUS_G3H=0V
- Thread starter VinceLx2
- Start date
U7100, D7105 removed.
pin 2: 0V R=22.2 ohm
pin 19: 0.33V R= 65kohm
pin 20: 0.33V R= 65kohm
I removed R7105, pin 2: 3.1 V
But then on pin 1 of R7105/pin 3 of D7105 (CHGR_DCIN_D_R), I had again 0V, 2.2 ohm. The boardview shows a link to R7192, and finally it was C7190 shorted!
I replaced C7190, D7105. I soldered back the same ISL, now I see orange light on charger, but PPBUS_G3H=1.1V
Here are U7100 voltages:
1 = 16.5V
2 = 17.8V
3 = 4.3V
9 = 0V
12 = 3.4V
13 = 3.4V
14 = 3.4V
15 = 0V
17 = 1.1V
19 = 5.5V
20 = 5.5V
27 = 1.1V
Is ISL dead, or is there any other components to check?
pin 2: 0V R=22.2 ohm
pin 19: 0.33V R= 65kohm
pin 20: 0.33V R= 65kohm
I removed R7105, pin 2: 3.1 V
But then on pin 1 of R7105/pin 3 of D7105 (CHGR_DCIN_D_R), I had again 0V, 2.2 ohm. The boardview shows a link to R7192, and finally it was C7190 shorted!
I replaced C7190, D7105. I soldered back the same ISL, now I see orange light on charger, but PPBUS_G3H=1.1V
Here are U7100 voltages:
1 = 16.5V
2 = 17.8V
3 = 4.3V
9 = 0V
12 = 3.4V
13 = 3.4V
14 = 3.4V
15 = 0V
17 = 1.1V
19 = 5.5V
20 = 5.5V
27 = 1.1V
Is ISL dead, or is there any other components to check?
Remove F7140 and check C7140 voltage.
If bad, change Q7180.
If still the same, try another ISL6259A.
If bad, change Q7180.
If still the same, try another ISL6259A.
I removed F7140, same voltage on C7140
I replaced Q7180 from a donor board, same voltage
I replaced ISL6259A also from a donor board, and now I finally have 12.6V. Thanks for the help
I have a question about ISL9259: can ISL6259 AHRTZ be replaced with ISL6259 HRTZ, for example from 820-3115 boards? I cannot find datasheets for them
I replaced Q7180 from a donor board, same voltage
I replaced ISL6259A also from a donor board, and now I finally have 12.6V. Thanks for the help
I have a question about ISL9259: can ISL6259 AHRTZ be replaced with ISL6259 HRTZ, for example from 820-3115 boards? I cannot find datasheets for them
Last edited:
It probably works; question of test...