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Customer complained that this phone charged only sometimes, totally true during testing using our good known housing, (customer screen was cracked, so dropped)
What's weird here is that when it charges it does it fine at 0.95A on 1A charger.
So basically what first jumps is PP5V0_USB is only 4.5V during charging.
When measured this line in diode mode with the battery disconnected you get the regular ~1600
BUT when the battery is connected the measurement drops to ~500 (should be the same with or without battery least according to 2 other boards)
That's when I knew this was not going to be an ez tristar tigris or Q1701 but hey you gotta try those anyways when you are lazy and waste even more time ugh.
Even checked the resistors and filters on that line and the caps seem good also since the diode reading without battery checks out.
Could not find anything during close inspection either
What else could I try in this situation?
What's weird here is that when it charges it does it fine at 0.95A on 1A charger.
So basically what first jumps is PP5V0_USB is only 4.5V during charging.
When measured this line in diode mode with the battery disconnected you get the regular ~1600
BUT when the battery is connected the measurement drops to ~500 (should be the same with or without battery least according to 2 other boards)
That's when I knew this was not going to be an ez tristar tigris or Q1701 but hey you gotta try those anyways when you are lazy and waste even more time ugh.
Even checked the resistors and filters on that line and the caps seem good also since the diode reading without battery checks out.
Could not find anything during close inspection either
What else could I try in this situation?
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