Wednesday, August 15, 2012

AKIRA - 14KLS4/CE SERVICE MODE LA-67931



TO ENTER SERVICE MODE
  1. Press "Menu" button on the remote control.
  2. Press "Recall" button three times sequentially to enter Factory Menu.
  3. Press [P+/P-] buttons on the remote control to select an item to adjust.
  4. Press [V+/V-] buttons on the remote control to adjust the data value to selected item.
  5. Press "Recall" button again to 'Exit' the Factory Menu.
DEFAULT DATA VALUES

Factory Menu - 00
  1. H-PHASE = 11
  2. OSD-H-POSITION = 25
  3. V-SIZE = 82
  4. V-POSITION = 1
  5. V-LENEARITY = 22
  6. V-SC = 4
  7. V-KILL = 0
  8. SUB-BRIGHT = 50
  9. RF -AGC AUTO = 25
Factory Menu - 01
  • H-BLK-L = 1
  • H-BLK-R = 1
  • TUNER 0:QJ   1  1:ALPS = 0
  • VOLUME LENEAR MEASURE = 0
  • B-Y DC LEVEL = 10
  • R-Y DC LEVEL = 11
  • B-Y DC LEVEL YUV = 9
  • R-Y DC LEVEL YUV = 8
Factory menu - 02
  1. RED-BIAS = 117
  2. GREEN-BIAS = 134
  3. BLUE-BIAS = 153
  4. RED-DRIVE = 99
  5. GREEN-DRIVE = 15
  6. BLUE-DRIVE = 92
OPTION MENU - 00
  1. BACK COVER OPTION = 0
  2. Q-ASM OPTION = 0
  3. OPT-AV-SYSTEM = 1
  4. Y-IN   0:P48    1:P54 = 1
  5. OPT-YUV = 0
  6. LANGUAGE SW CE = 1
  7. ENG 0  : CH 1 = 0
OPTION MENU 01
  • LV 1116O  OPT = 1
  • AUDIO SW = 1
  • SIF 6.5M = 1
  • SIF 6.0M = 1
  • SIF 5.5M = 1
  • SIF 4.5M = 1
POWER SUPPLY VOLTAGE ADJUSTMENT
  • Check AC voltage is normal or not at AC 220V 50Hz.
  • Receive a broadcast signal and adjust the brightness and contrast until the standard picture is obtained.
  • Adjust (RP950) until voltage between cathode of (VD950) and GND of the chassis is 110V+/-0.5V.
SERVICE FLOW CHART
  • POWER SUPPLY:  Check input voltage > check voltage of C910 anode > check pin 3 of N901 > check V901 > check input voltage of T901 secondary coil > check voltage of N904, N905 pin-3(5v) and N903 pin-3(9v) > check voltage of N103 pin 8,31,32,35,36,43,55 (5V) and pin-11,19 (8V) > check voltage of N602 pin 8 (5V).
  • AUDIO CIRCUIT:  Check power supply of audio power amplifier circuit > check input audio signal of audio power amplifier > check waveform of N103 pin-5 > check waveform of xs808 pins 16,17 > check waveform of N201 pins 8,9.
  • HORIZONTAL CIRCUIT:  Check voltage of T402 pin-3 (110V) > check voltage of N103 pin-19 (+9V) > check waveform of V401 base > check waveform of V402 collector > check output voltage of T402 coil > check waveform of T402 Pin-8.
  • VERTICAL CIRCUIT:  Check voltage of N440 Pin2(+25V) & Pin7(+9V) . check voltage of N103 pin 19 (9V) > check waveform of N103 Pin-17 > check waveform of N440 pin-1 > check waveform of N440 Pin-5.
  • MCU CIRCUIT: Check voltage of N103 Pin 31,32(5V) > check waveform of N103 pin-33
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