Samsung SGH-B7300C, GT-B7300 Service Manual

Product
Model
Subject

1. Purpose

- To inform All ASCs and Contact Centers of information about technical TIP

2. Symptom

- MIC Volume is too low

3. Instruction

- If MIC Volume is too low, Check ESD Diode.

- If Diode is assembled in the opposite direction, remove Diode and solder new one
in correct direction refer to below.

GSM
GT-B7300
Diode change Guide (Low MIC Volume issue)

Notice No.
Notice Date

Notice

10-26
16th Apr ‘10

1) Disassembly

Description

Step 1. Disassemble Rear (1)

1) Unscrew
7 Points

2) Disassemble 3 Point
in volume key side

3) Disassemble

2Point in upside

4) Disassemble 3Point
in SD Card side

Step 2 Disassemble Rear (2)

※ Caution
Take care not to damage Locker

→LCD Connector

①

②

※ Caution

※ Caution

1) Disassemble rear
from upside

2) Unscrew 1 Point

Step 3. Disassemble PBA

LCD Connector

1) Disassemble PBA refer to pictur e s

Keep V shape not to damage FPCB

2) Disassemble connector

Key Connector

2) Diode change

※ Change Diode, if Diode is assembled in wrong direction.

Key Connector

Description

Step 1. Check Diode Direction

Take care PCA and Diode Direction

Wrong Direction

Correct Direction