AKIRA - 14KLS4/CE SERVICE MODE LA-67931
TO ENTER SERVICE MODE
- Press "Menu" button on the remote control.
- Press "Recall" button three times sequentially to enter Factory Menu.
- Press [P+/P-] buttons on the remote control to select an item to adjust.
- Press [V+/V-] buttons on the remote control to adjust the data value to selected item.
- Press "Recall" button again to 'Exit' the Factory Menu.
DEFAULT DATA VALUES
Factory Menu - 00
- H-PHASE = 11
- OSD-H-POSITION = 25
- V-SIZE = 82
- V-POSITION = 1
- V-LENEARITY = 22
- V-SC = 4
- V-KILL = 0
- SUB-BRIGHT = 50
- 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
- RED-BIAS = 117
- GREEN-BIAS = 134
- BLUE-BIAS = 153
- RED-DRIVE = 99
- GREEN-DRIVE = 15
- BLUE-DRIVE = 92
OPTION MENU - 00
- BACK COVER OPTION = 0
- Q-ASM OPTION = 0
- OPT-AV-SYSTEM = 1
- Y-IN 0:P48 1:P54 = 1
- OPT-YUV = 0
- LANGUAGE SW CE = 1
- 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