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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 6 / iPhone 6 Plus / iPhone 6S / iPhone 6S Plus

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Old 09-04-2019, 11:58   #1 (permalink)
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Join Date: Aug 2006
Location: POLAND
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iPhone 6S dead after water damage


Hello


The mainboard looks good no visible damage.
So I did some measurements ( DM = Diode Mode ):


Power Consumption: 0 - 0.06A
PP_BAT_VCC: ~0.50 - 3.78
PP_VCC_MAIN: 4.26V
PP_0V9_LDO3: short circuit ( only if is connected to power supply )
PP_CPU: 0.90V | DM 576 | 21.8 Om
PP_GPU: short circuit | DM 13 | 11.4 - 12.4 Om
PP_1V8: 1.79V
PP_0V9: 0.9V
TRISTAR_DP1_CONN_P: DM ~390
TRISTAR_DP1_CONN_N: DM 370-400
TRISTAR_DP2_CONN_P: DM 500-693
TRISTAR_DP2_CONN_N: DM 503-690


If this is tristar problem or U_PMU_RF ?
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Old 09-08-2019, 08:25   #2 (permalink)
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Try connect phone to PС with "force DFU" testpoint
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