iPhone 6 Plus black screen can't open machine repair

iPhone 6 Plus black screen can’t open machine repair

Machine model: iPhone 6 Plus

Malfunction: no display can’t be turned on

Maintenance process: DC power supply is connected, current change is normal, Update System can pass, but no display can’t be turned on. Measure the display base to Diode value is normal, the display screen conditions are all normal, and the CPU is still installed. Check the conditions of schematic measuring MIPI module (pull-up resistance and pull-down resistance of VCC, etc.).

iPhone 6 Plus black screen can’t open machine repair Figure 1.

When PP1V0 was detected, no VCC found an abnormality, and diode value to ground was 0. It is suspected that the CPU is not doing well, and it is the same after reinstalling again. Dismantle the CPU measuring mainboard without Short circuit, hit the CPU ground value without Short circuit, and then reinstall it with Short circuit. Remove it and hit the CPU ground value carefully. It is found that the three points above and below Short circuit are not short, so the CPU is broken.

iPhone 6 Plus black screen can’t open machine repair Figure 2.

Only after studying schematic can we know that this is just MIPIC Short circuit, a module Short circuit. Can we not use it(According to the editing analysis, these five test points are all the way in schematic, which should have been intercommunicated, but in this paper, the upper three points are VDD10_MIPIC, and the lower two points are VDD10_MIPID, which belong to two different modules, VDD10_MIPIC module Short circuit, and have no influence on VDD10_MIPID).