VK Quality Group GSM C/S
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☞
EL_Key Backlight Trouble
EL_Key Backlight Trouble
START
Main Key_EL
Navi Key_EL
J404 Well
Soldering?
Rework J404
U402 4pin
(EL_NAVI_EN)
HIGH?
Check U201
U402 8,9pin
HIGH?
Check
U402 & L401
Replace
EL_NAVI_KEY
FPCB
NO
NO
NO
YES
YES
YES
Contact between
J406 and
EL_SHEET
Recontact
EL_SHEET
U402 1pin
(EL_MAIN_EN)
HIGH?
Check U201
U402 8,10pin
HIGH?
Replace
MAIN EL_SHEET
Check
U402 & L401
YES
YES
YES
NO
NO
NO
END
Summary of Contents for VK4500
Page 1: ...VK Quality Group GSM C S GSM GSM SERVICE MANUAL SERVICE MANUAL VK4500 VK4500 ...
Page 11: ...VK Quality Group GSM C S Appearance Appearance ...
Page 12: ...VK Quality Group GSM C S Icons Icons ...
Page 13: ...VK Quality Group GSM C S Icons Icons ...
Page 14: ...VK Quality Group GSM C S Icons Icons ...
Page 15: ...VK Quality Group GSM C S LCD Panel LCD Panel ...
Page 26: ...VK Quality Group GSM C S Battery Rear Case Battery Rear Case Disassembling Disassembling ...
Page 30: ...VK Quality Group GSM C S Main PCB Main PCB Disassembling Disassembling ...
Page 32: ...VK Quality Group GSM C S Lower Case Lower Case Ass Ass y y Disassembling Disassembling ...
Page 36: ...VK Quality Group GSM C S LCD LCD Ass Ass y y Disassembling Disassembling ...
Page 54: ...VK Quality Group GSM C S Battery Charger Block Battery Charger Block ...
Page 56: ...VK Quality Group GSM C S Main PCB Main PCB Top Top Bottom Bottom ...
Page 57: ...VK Quality Group GSM C S Module Area Module Area ...
Page 58: ...VK Quality Group GSM C S RF Area RF Area ...
Page 59: ...VK Quality Group GSM C S BASEBAND Area BASEBAND Area ...
Page 74: ...VK Quality Group GSM C S TX Power Trouble E TX Power Trouble E GSM GSM ...
Page 75: ...VK Quality Group GSM C S RX Sensitivity Trouble E RX Sensitivity Trouble E GSM GSM ...
Page 76: ...VK Quality Group GSM C S RX Sensitivity Trouble E RX Sensitivity Trouble E GSM GSM ...