Text preview for : Test point data.pdf part of LG LG 1200B Service manual for LG 1200B
Back to : LG_B1200_SM.part1.rar | Home
5. TEST POINT DATA
5. TEST POINT DATA
Component Side (1-1)
1
2
3 13 4
11 6 14 12 9 10
5 7 8 16 15
- 35 -
5. TEST POINT DATA
Location
1 2 3 4 5 6 7 8 9 10 11 12 13 14 J103 Q101 U202 U201 U301 U101 Q301 Q302 J301 J104 J102 U302 Y201 R104 R105 R109 D313 D102
Component Side (1-1)
Battery connector : For damage or cold soldering cause power on failure P-channel MOSFET with schottky diode : For damage or cold soldering cause charger function failure Nausica_CS : analog baseband chipset (ABB) Hercrom20 : digital baseband chipset (DBB) 16Mbit flash ROM : For damage or cold soldering cause power on failure 3V, 200mA LDO regulator : For damage or cold soldering cause accessory power failure. Isolated dual transistors : For damage or cold soldering Q301A cause vibration motor Failure, Q301B cause keypad back-light failure Isolated dual transistors : For damage or cold soldering Q302A cause pre-charger indication failure, Q302B cause the LCD back-light failure Vibration motor : For damage or bad connection cause vibrator failure. System connector : For damage or cold soldering cause headset failure, trace/debug /SW download failure SIM connector : For damage or bad connection cause SIM card failure. Audio amplifier : For damage cause speaker function failure. 32.768kHz crystal : For damage cause RTC function failure. 8P4R resistor network : For damage or cold soldering cause trace/debug /SW download failure Switching diode array : For damage or cold soldering cause the surge noise by Vibrator Switching diode array : For damage or cold soldering cause the flash fast program function failure
15 16
- 36 -
5. TEST POINT DATA
Component Side (1-2)
23 33 29 20 26
19 18 21 22 25 24
32
28
30 31
27
- 37 -
5. TEST POINT DATA
18 19 20 21 22 23 24 25 26
Location C223 C224 C225 C226 C227 C207 C208 C206 R208 R301 C304 C305 R110 C107 C106 R107 R207 C205 R307A R308A R307A R308A R204 R210 R215 C209 C210
Component Side (1-2) VR2B regulator (2.85V) : For damage or cold soldering cause power supply for DBB & ABB peripheral failure. VR1B regulator (2V) : For damage or cold soldering cause power supply for ABB internal logic failure VR3 regulator (2.85V) : For damage or cold soldering cause power supply for ABB analog circuits failure VR2 regulator (2.9V) : For damage or cold soldering cause power supply for Memory device failure. VR1 regulator (1.8V) : For damage or cold soldering cause power supply for DBB Core & RTC failure SIM regulator (3V/5V) : For damage or cold soldering cause power supply for SIM Interface failure VREF output (1.2V) : For damage or cold soldering cause power supply for power on failure IBIAS output : For damage or cold soldering cause power supply for Power on failure Microphone Input : For damage or cold soldering cause microphone failure
27 28 29 30 31 32 33
Ext. audio Input : For damage or cold soldering cause external audio input failure Ext. audio output : For damage or cold soldering cause external audio output failure ABB local Osc. generator : For damage or cold soldering cause ABB local Osc. failure Vibrator control : For damage or cold soldering cause vibrator failure Back-light control : For damage or cold soldering cause all back-light LED failure SIM card power control : For damage or cold soldering cause SIM card power control failure. Uplink & downlink I/Q Filtering : For damage or cold soldering cause uplink or downlink I/Q signal failure.
- 38 -
5. TEST POINT DATA
Keypad Side (2-1)
1 7
2
4 3
5
6
- 39 -
5. TEST POINT DATA
1 2 3 4 5 6 7
Location LS301 DS301 D301~ D312 S301~ S317 M301 B201 Q601
Keypad Side (2-1) Speaker : For bad connection cause speaker failure LCM Connector : For damage or cold soldering cause LCD Display failure Back-Light LED : For damage or cold soldering cause back-light LED failure Keypad Switches : For damage or shirt circuit cause keypad function failure Microphone holder : For damage or cold soldering cause microphone failure Batter holder : For damage or cold soldering cause RTC function failure T/R Switch transistor : For damage or cold soldering cause T/R Switch function failure
- 40 -