ZAKLINTOWN
New member
Hi guys,
Have a feeling that this is a hopeless case but before I dump the board want to see if anybody might give me a hand with this,
So basically board came in with no power, got 20V on charger 0.02A - 0.11A, checked rails and PPBUS_G3H was 0.04 short to ground,
Injected 1V board was pulling around 2.5A but nothing really got hot, after a while suspected U7210 getting worm, didn't inject more than 1.4V, replaced it and short was gone,
PPBUS_G3H 13V stable
PP5V_S5 5.01 stable
PP5V_S4 as soon as probes touching it's 0.00 then quickly jumps up to 3.5V, 4.7V and back to 0.00 and so on... (NO SHORT)
PP5V_S0 as soon as probes touching it's 0.00 then quickly jumps up to 3.5V, 4.6V and back to 0.00 and so on... (NO SHORT)
PP3V3_S5 3.34V stable
PP3V3_S4 as soon as probes touching it's 0.00 then quickly jumps up to 1.5V, 3.3V and back to 0.00 and so on... (NO SHORT)
PP3V3_S0 as soon as probes touching it's 0.00 then quickly jumps up to 1.2V, 3.4V and back to 0.00 and so on... (NO SHORT)
Checked rest of the rails and can't find any short
Just poked probes around big coils and have stable 1V on L8060 as well...
Have a feeling that this is a hopeless case but before I dump the board want to see if anybody might give me a hand with this,
So basically board came in with no power, got 20V on charger 0.02A - 0.11A, checked rails and PPBUS_G3H was 0.04 short to ground,
Injected 1V board was pulling around 2.5A but nothing really got hot, after a while suspected U7210 getting worm, didn't inject more than 1.4V, replaced it and short was gone,
PPBUS_G3H 13V stable
PP5V_S5 5.01 stable
PP5V_S4 as soon as probes touching it's 0.00 then quickly jumps up to 3.5V, 4.7V and back to 0.00 and so on... (NO SHORT)
PP5V_S0 as soon as probes touching it's 0.00 then quickly jumps up to 3.5V, 4.6V and back to 0.00 and so on... (NO SHORT)
PP3V3_S5 3.34V stable
PP3V3_S4 as soon as probes touching it's 0.00 then quickly jumps up to 1.5V, 3.3V and back to 0.00 and so on... (NO SHORT)
PP3V3_S0 as soon as probes touching it's 0.00 then quickly jumps up to 1.2V, 3.4V and back to 0.00 and so on... (NO SHORT)
Checked rest of the rails and can't find any short
Just poked probes around big coils and have stable 1V on L8060 as well...