HOW TO ENTER SERVICE MODE TO SHARP - 21VL-L

SERVICE MODE

• Service mode is switched by 'SERVICE' key, CH UP + VOL DN when reset.
• Service mode can be cancelled by 'SERVICE' key, during service mode.
• Service mode can be switched by using 'MENU' key to other 5 modes.

1. Adjustment mode.
2. Setting mode
3. Confirmation mode.
4. Option mode.
5. NVM edit mode.

• During service mode, AFT operation is prohibited.  The setting data for PLL is always set to data. 
• During Service Mode, the following user data are set to default value and stored as last memory. Picture/Tint/Color/Bright/Sharp/Color Temp/bass/Treble/Balance/MTS/FAO/Speaker/energy Save.
• During Service Mode. OSD display for ON/OFF is toggled via (CH CALL) key.  At display OFF condition, if changing adjustment data, channel, input source, it remains display OFF.  At display OFF condition, if changing adjustment item, it returns to display ON.
• During service mode, the following operations are prohibited.  Closed Caption/No Signal Blue Screen.
• During service mode, sound is muted [only MTSIC] except when selecting the following items.  V24,M01.

AUTO ADJUSTMENT

H-VCO

1. When there is H-Vco auto adjustment key input at item H-VCO, auto adjustment will be implemented.
2. H-FREE (1chip) is set 1.
3. H-OUT (1 chip) is set by intelligent monitor output.
4. IM input becomes TIM input.
5. H-VCO (1 chip data) is changed so that the number is 126 inside 8ms interval.
6. When adjustment is completed, OSD display and H-VCO auto adjustment data of EEPROM  are updated.
7. H-FREE (1chip), intelligent monitor output, IM input mode are recovered.

RF-AGC

• If there is RF-AGC auto adjustment key input at at item PIF-VCO, auto adjustment will be implemented.
• VIF-DEF (1chip) is set to 1.
• AFT output (1chip) is set by intelligence monitor output.
• IM input becomes AD input.
• RF-AGC (1chip) is decreased from current RF-AGC value to '0'.  The maximum AFT input voltage is obtained.
• RF-AGC (1chip) is increased until at the point of AFT input voltage is max [0.3V] adjustment is completed.
• When adjustment is completed , OSD display and RF-AGC auto adjustment status in EEPROM is updated.
• Intelligent monitor output, IM input mode are recovered.

PIF-VCO

1. If there is PIF-VCO auto adjusment key input at item PIF-VCO, auto adjustment will be implemented.
2. VIF-DEF (1chip) is set to 1.
3. AFT output (1chip) is set by intelligent monitor output.
4. Im input becomes AD input.
5. VIF-VCO (1 chip) is changed so that the input voltage becomes 2.5V.
6. When adjustment is completed, OSD display and PIF-VCO auto adjustment status in EEPROM will be updated.
7. VIF-DEF (1chip) intelligent monitor output, IM input mode are recovered.

S-TRAP

1. If there is S-TRAP auto adjustment key input at item S-TRAP, auto adjustment will be implemented.
2. S_TRAP output is set by intelligent monitor output.
3. IM input becomes AD input.
4. S-Trap (1chip) is set to the value of V45[S-TRAP ADJ start]
5. S-Trap_result is set to the value of V45 (S-TRAP ADJ start).
6. S-Trap (1chip) is increased until the minimum input voltage becomes minimum.
7. Wait 20ms before sampling the the new_AD_Data.
8. When adjustment is completed, OSD diisplay and S-Trap auto adjustment status in EEPROM are updated.
9. S-Trap (1chip) intelligent monitor output, IM input mode are recovered.