SAMSUNG Proprietary-Contents may change without noticeFlow Chart of Troubleshooting9-18This Document can not be used without Samsung's authorization9-9. Back Light (for Color Main LCD)Is LCD Contrast set on highlevel in the Menu?Backlight does not workENDNoYesHDC702 PIN 40 = H ?NoYesCheck I2C data is OK?NoYesSet LCD Contrast on high levelResolder HDC702 or change PBACheck related circuit from UCP401Yes

Safety Precautions

Specification

gsm tx power class

Product Function

Array course control

Exploded View and Parts List

cellular phone parts list

Main Electrical Parts List

Block Diagrams

PCB Diagrams

main bottom

Flow Chart of Troubleshooting

charging part

sim part

U709

microphone part

U600

key data input

key back light

U803

gsm900 receiver

dcs receiver

pcs receiver

U1103

bluetooth part

reference data

Disassembly and Assembly

Samsung GT-B7702 Service Manual

GT-B7702