Camera fail - BMMI
No matter which sensor fails, swap the modules and reassemble.
1. If all
three camera
fail:
Probably CPU and ISP issues
(1) Check
U1201 (ISP)
and surrounding components
R1239, PU9510, PU9507,
PU9509, PU8202
for SMT problems using X-ray. Besides, check CPU
U0201
for any short circuits.
(2) Demount the shielding and compare the impedance of the pins in the table
below with normal PCB. Besides, connect the display and camera to probe
the voltage and swap the corresponding IC of the voltage shown in the table.
(3) Remount or change the
ISP (U1201)
if there are no other suspicious defects.
Pin (voltage)
Ohm
IC
PR9544.1 (1.8V)
20K
PC8204 (1.2V)
12K
PU8202
C1223.1 (1.2V)
1.8K
PU9509
PC9514.1 (1.0V)
1.2K
PU9507