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33
Keypad no function
Keypad no
function
All keys no
function
Single Key no
function
Some keys no
functions
Upgrade the
software.
NO
Check if there is any liquid leak
or corruption.
Clean the short
or corrosion
circuit
NO
YES
Re-solder or
replace CPU.
Clean the key.
Check the circle of the faulty
key if there is 0.7V voltage to
the ground.(By diode mode)
NO
Содержание EV730
Страница 1: ...1 EV730 Service Manual ...
Страница 4: ...4 Chapter 2 Exploded View ...
Страница 7: ...7 Finish Remove the screw 7 Take out PCBA 8 Take out keypad ...
Страница 9: ...9 finish Fasten the screws 8 Tighten the front back shell Install the battery cover ...
Страница 11: ...11 5 2 PCBA Layout Side A Side B ...
Страница 12: ...12 Chapter6 System Block Chart ...
Страница 13: ...13 Chapter 7 Circuit Map 7 1 1 Baseband CPU Audio Keypad Other Interface Camera Bluetooth ...
Страница 14: ...14 7 1 2 Baseband Keypad 7 1 3 Clock 32 768KHZ Circuit ...
Страница 40: ...40 10 Downloading is completed ...
Страница 44: ...www s manuals com ...