LG-525 Service Manual

$9.99
LG-525 Service Manual
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LG-525 Service Manual

This manual provides the information necessary to repair, calibration, description and download the features of this model.

FORMAT: High resolution PDF document!
Zip archive: 51 323 kB

1. INTRODUCTION
1.1 Purpose . .......................................................................5
1.2 Regulatory Information . ..................................................5
1. Abbreviation . ...................................................................7

2. PERFORMANC
2.1 H/W Features . ................................................................9
2.2 Technical Specification. . ..................................................11

3. TECHNICAL BRIEF
3.1 Functional Block Diagram . .............................................16
3.2 Digital Main Processor (PMB8810, U101/U401) . ....17
3.3 Power Management . ........................................................22
3.4 FEM with integrated Power Amplifier Module (SKY77547, U01, U02) .....4
3.5 Crystal(26 MHz, X100, X400) . ........................................6
3.6 RF Subsystem of PMB8810 (U101, U401) . ................7
3.7 MEMORY . ........................................................................42
3.8 Bluetooth module . ............................................................48
3.9 Dual SIM Card Interface . .................................................50
3.10 LCD Interface . ...................................................................51
3.11 Battery Charger Interface . ...........................................54
3.12 Keypad Interface . ............................................................55
3.13 Audio Front-End . .............................................................56
3.14 Camera Interface(1.M Fixed Focus Camera) . ......62
3.15 Vibrator Interface . ...........................................................64

4. TROUBLE SHOOTING
4.1 Trouble shooting test setup . .........................................65
4.2 RF Component . ..................................................................66
4. RX Trouble . ...........................................................................68
4.4 TX Trouble . ...........................................................................74
4.5 Power On Trouble . ............................................................80
4.6 Charging Trouble. ..............................................................8
4.7 Vibrator Trouble . ................................................................85
4.8 LCD Trouble . ........................................................................87
4.9 Camera Trouble . .................................................................91
4.10 Speaker Trouble . .............................................................98
4.11 Earphone Trouble . ........................................................100
4.12 Receiver Trouble . ...........................................................10
4.1 Microphone Trouble . .................................................. 106
4.14 SIM Card Interface Trouble . .......................................108
4.15 Micro SD Trouble . ..........................................................110
4.16 WiFi Trouble . ...................................................................112
4.17 FM Radio Trouble . .........................................................116

5. DOWNLOAD

6. BLOCK DIAGRAM

7. CIRCUIT DIAGRAM

8. BGA Pin Map

9. PCB LAYOUT

10. STAND ALONE TEST
10.1 Introduction . ..................................................................149
10.2 Setting Method . ............................................................149
10. Tx Test. . ..............................................................................151
10.4 Rx Test . ............................................................................. 152

11. AUTO CALIBRATION
11.1 Overview. . ............................................................153
11.2 Configuration of HotKimchi . ....................................153
11. Description of Basic File . ..........................................154
11.4 Auto Calibration setup. ............................................155
11.5 Procedure . ............................................................156
11.6 AGC . ...................................................................158
11.7 APC . ...................................................................158
11.8 ADC . ..................................................................158
11.9 Target Power . .......................................................158
12. EXPLODED VIEW & REPLACEMENT PART LIST
12.1 EXPLODED VIEW . ....................................................... 159
12.2 Replacement Parts . ......................................................161
12. Accessory . ....................................................................117



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We are in business since 2002 and do our best to give our customers perfect service!

  alaa saedy 2013-03-04 19:10:42  
  Hi thank you so much for help more people for there job and help me about rest my printer and other helps
  kennet bo 2009-01-25 21:14:51  
  realy worked. Thank you!
  nguyen ho 2020-07-30 17:09:13  
  Epson never fails us in terms of giving technical support, they give 100% customer satisfaction...thank you until I need your support again. ☺☺☺☺☺
  Jens Klapp 2011-04-06 22:57:41  
  Hallo, thank you very much. Oder in Deutsch: Herzlichen Dank. It worked fine. No problems MfG Jens Klapp
  NaTiallie Henry 2012-01-05 00:31:30  
  I am so happy! This utility is amazing! Thank you for creating it Mac users too! Perfect! My printer is working! So happy I could shout!
  Alfredo Llerena 2020-02-20 17:11:29  
  I must admit I was very skeptical about all this !!! And above all - There we go, they want the Credit Card details !!!

I don't even know the current exchange rate but proceeded thinking nothing will come of this ....

Within minutes I was sent the RESET CODE along with the RECEIPT FOR PAYMENT !

It worked like a charm !

The FIRST , but definitely not the LAST time I will be using this site !

Thank you !
Anthony Campbell
Printamedic (South Africa)
Cell: 073 580 8517
  ion barboi 2012-09-13 00:11:51  
  John I want to Thank You for all your help. I own and run a T-Shirt printing company, nothing big but it helps and I use the printer to print out the film that I need to silk screen them, again Thank You.
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