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Service Manual

Service Manual

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Service Manual

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  1. Service Manual Model : KKT27 Tech. Name:

  2. Specification Method of SW Download Circuit Description Trouble Shooting TEST Mode Content * Phone layout* Icons Status of KKT27 LCD* H/W Features * S/W Features * Baseband Section* RF Section * Main Board* Trouble Shooting

  3. Specification * LCD Screen Display : Main : QVGA2.8" TFT * Sub LCD Screen Display : N/A * Antenna : Internal (900/1800) * Camera: Camera 0.3M

  4. Specification Phone layout -1

  5. Specification Phone layout -2

  6. Specification Icons Status of SL388 LCD -1

  7. Specification Icons Status of SL388 LCD-2

  8. Specification Icons Status of SL388 LCD -3

  9. Specification H/W Features

  10. Specification S/W Features

  11. Calibration Data Upload (1)

  12. Calibration Phone (1)

  13. Circuit Description (Baseband Section) 1. SC6531(GSM/GPRS Base band Processor)

  14. Circuit Description (Baseband Section) SC6531

  15. Circuit Description (Baseband Section)

  16. Circuit Description (Baseband Section) 3. MX25U6435EZNI-10G(64NOR Flash memory)

  17. Circuit Description (RF Section) 1. SC2661D (RF PA)

  18. Trouble Shooting

  19. Main Board Bottom Surface Component

  20. Main Bord Top Surface Component

  21. PCB LAYOUT (TOP – Reference)

  22. PCB LAYOUT (Bottom – Reference)

  23. Trouble Shooting 1. Power on Repair chart 1. Check VBAT(3.8V) . 2. Check Voltage out . If not ,Check the U0100Defective or Cold solder VSIM 1.8V/3.0V –C0231/C0230 VMEM 1.8V- C0222 VMEM_SPI 1.8V - C0221 VCAM_ANA_2V8 2.8V –C0227 VCAM_CORE_1V8_B 1.8V -C0226 VDDIO_2V8 2.8V- C0223 VDDSD 2.8V- C0228 VDDRF 2.8V- C0206 U201 3. Check the Output 26MHz Crystal (X0601) If not ,Check the U0100Defective or Cold solder 5. Re download If not . Change CPU (U0100) OCS100 U500 U100

  24. Trouble Shooting 2. LCD Dead Repair chart (1) 1. Check the Connector LCD FPC,LCD If not , Change the F-PCB,LCD 2. Check Voltage out . C0223(2.8V) or LCD 6PIN,7PIN CON10 U500 U100 3. Check the EMI Filter data line. DB0~ DB7 If not ,Check the DB0 ~ DB7Defective or Cold solder and CPU (U0100) Defective.

  25. Trouble Shooting 3. LCD Dead Repair chart – Touch Pannel (2) 1. Check the ,B’d To B’d FPCB,LCD Module If not , Change the F-PCB,LCD 2. If not ,Check the U0100Defective or Cold solder U700 U100 U500

  26. Trouble Shooting 4. SIM Error Repair chart 1. After insert SIM ,Check the LCD Display. 2. Check the voltage out. CONN. 1/6/11/16 PIN (1.8V/3.0V) If not ,Check the U0100 Defective or Cold solder. U300

  27. Trouble Shooting 5. Melody Dead Repair chart 1. Check the speaker Spring state on Rear Cover If not good, Change the Speaker 2. Check the U0100 CON130

  28. Trouble Shooting 6. Audio Dead Repair chart - (1) 1. Check the MIC. MIC1 If not ,Check the MIC1 Defective or Cold solder. 2. Check the MICBIAS. R0501(1.9~2.3V) If not ,Check the U0100Defective or Cold solder 3. Check the B0507, B0508 solder state. If not ,Check the C0501, C0502Defective or Cold solder

  29. Trouble Shooting 7. Vibrator Dead Repair chart 1. Check the Vibrator wire. If not , Re-solder or Change 2. Check the U0100 Signal If not , Change the CPU (U0100) U300

  30. Trouble Shooting 8. Camera Dead Repair chart U300 1. Check the connector state or camera module. If not ,Change the camera module 2. Check the DATE.CCIR_D00-SCCIR_D07 If not ,Change the U0100 3. Check the voltage. J861 6PIN (2.8V),95IN (1.8V) If not ,Check the U0100 Defective or Cold solder 4. Change the CPU. U0100

  31. Trouble Shooting 9. T-Flash Card Dead Repair chart • Check the T-Flash connect state. • If notGood, Change the T-Flash connect. • 2. Check the voltage. C0228 (2.8V) • If not ,Check the U0100 Defective or Cold solder • 3. Change the CPU. U0100

  32. Trouble Shooting 10. Charger Dead Repair chart 1. Check the Battery connector state. If not ,Check the Battery Connector Defective or Cold solder. 2. Check the voltage.C0391(5.0V) If not ,Check the T0391 Defective or Cold solder 3. Change the CPU. U0100

  33. Trouble Shooting 11. FM Receiver Dead Repair chart 1. Check the Ear-Mic phone connection If not ,Check the J0881Defective or Cold solder. 2. Check the L0881/R0882/C1101 If not ,Check the U1101 Defective or Cold solder 3. Change the CPU. U0100

  34. Deberg Code Factory ModeTest : *#346#+call+back

  35. Deberg Code Test Mode The End Think You