4.11 Key Backlight LED Trouble
SETTING : Connect PIF to the phone, and power on, Enter engineering mode, and set
‘Backlight on’ at Backlight of BB test menu
Checking Flow
START
PIF Power On
Check the soldering R329,R331
Is the Voltage at pin 2 at Q301
about 1.3 V ?
Key backlight LED
Working
No
Check the soldering and
replace LEDs not working
Are all LEDs LD300-LD303,
LD306-LD313 not working
Yes
Replace Q301, and try
again
Yes
Yes
No
- 89 -
4. TROUBLE SHOOTING
Summary of Contents for G7100
Page 20: ...Figure 3 4 Power Amplifier Block Diagram 22 3 TECHNICAL BRIEF ...
Page 28: ...3 8 Analog Main Processor AD6521 Figure 3 9 AD6521 30 3 TECHNICAL BRIEF ...
Page 31: ...Figure 3 10a Voice band circuit Diagram 33 3 TECHNICAL BRIEF ...
Page 32: ...Figure 3 10b Voice band circuit Diagram 34 3 TECHNICAL BRIEF ...
Page 33: ...Figure 3 10c Voice band circuit Diagram 35 3 TECHNICAL BRIEF ...
Page 39: ...Figure 3 13 Keypad Switches and Scanning 41 3 TECHNICAL BRIEF ...
Page 42: ...Figure 3 16a Hands free Headset Jack Interface 44 3 TECHNICAL BRIEF ...
Page 43: ...Figure 3 16b Hands free Headset Jack Interface 45 3 TECHNICAL BRIEF ...
Page 49: ...Figure 3 21a CLC344E 51 3 TECHNICAL BRIEF ...
Page 50: ...Figure 3 21b Sensor connection 52 3 TECHNICAL BRIEF ...
Page 70: ...Figure 4 12 Test Points 72 4 TROUBLE SHOOTING ...
Page 79: ...Test Points Receiver part Circuit Diagram Figure 4 16 81 PIN 35 33 4 TROUBLE SHOOTING ...
Page 83: ...Figure 4 18 Test Points 85 R112 R111 R113 R115 C121 C145 C147 4 TROUBLE SHOOTING ...
Page 84: ...MIC part Circuit Diagram VINNORP VINNORN 86 4 TROUBLE SHOOTING ...
Page 92: ...Figure 4 22 Test Points SIM part Circuit Diagram 94 J100 4 TROUBLE SHOOTING ...
Page 96: ...Earphone part Circuit Diagram 98 4 TROUBLE SHOOTING ...
Page 101: ...HFK part Circuit Diagram 103 4 TROUBLE SHOOTING ...
Page 102: ... 104 4 TROUBLE SHOOTING ...
Page 103: ...Figure 4 24a Test Points Figure 4 24b CN300 105 U400 U401 CN300 4 TROUBLE SHOOTING ...
Page 106: ...Camera part Circuit Diagram 108 4 TROUBLE SHOOTING ...
Page 108: ...5 DISASSEMBLY INSTRUCTION 5 1 Disassembly 5 DISASSEMBLY INSTRUCTION 110 ...
Page 109: ...5 DISASSEMBLY INSTRUCTION 111 ...
Page 110: ...5 DISASSEMBLY INSTRUCTION 112 ...
Page 111: ...5 DISASSEMBLY INSTRUCTION 113 ...
Page 112: ...5 DISASSEMBLY INSTRUCTION 114 ...
Page 113: ...5 DISASSEMBLY INSTRUCTION 115 ...
Page 114: ...5 DISASSEMBLY INSTRUCTION 116 ...
Page 115: ...5 DISASSEMBLY INSTRUCTION 117 ...
Page 133: ... 135 9 PCB LAYOUT ...
Page 134: ... 136 9 PCB LAYOUT ...
Page 143: ...Figure 11 2 HW test setting Figure 11 3 Ramping profile 11 STAND ALONE TEST 145 ...
Page 147: ... 149 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...