Sunday, December 27, 2015

SHARP 21FL91 SERVICE MODE AND ADJUSTMENTS

SHARP 21FL91

SERVICE MODE
Entering to service mode
1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset.
2. Service mode is cleared by entering SERVICE key command during service mode.
3. If key input port (SERVICE) input is LOW, then it is in service mode.
4. During key input port (SERVICE) input is LOW, clearing service mode by key input SERVICE is disabled.
5. Service mode can be switched to 4 modes as follows by key input MENU;
SELF ADJUSTMENT
H-VCO
1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed.
2. H-FREE(1chip) is set to 1.
3. H-OUT is set by intelligent monitor output.
4. IM input is set as TIM input.
5. H-VCO(1chip) data is changed so that the number of input pulse is 125 inside 8ms interval.
6. When adjustment completed, OSD display and H-VCO self-adjustment status data of EEPROM are updated.
7. H-FREE(1chip), intelligent monitor output and IM input mode are recovered.
RF-AGC
1. When there is RF-AGC self-adjustment key input for adjustment item RF-AGC, self-adjustment is performed.
2. AGC-OUT is set by intelligent monitor output.
3. IM input is set as AD input.
4. By decreasing RF-AGC (1chip) data from current RF-AGC adjustment value to 0, AFT input voltage becomes the maximum setting value.
5. Increase RF-AGC(1chip) data, when AFT input voltage is at (max. 0.3V) point, adjustment is completed.
6. When adjustment completed, OSD display and RF-AGC self-adjustment status data of EEPROM are updated.
7. Intelligent monitor output and IM input mode are recovered.
PIF-VCO
1. When there is PIF-VCO self-adjustment key input for adjustment item PIF-VCO, self-adjustment is performed.
2. VIF-DEF(1chip) is set to 1.
3. AFC is set by intelligent monitor output.
4. IM input is set as AD input.
5. VIF-VCO(1chip) data is changed so that input voltage becomes 2.5V.
6. When adjustment completed, OSD display and PIF-VCO self-adjustment status data of EEPROM are updated.
7. VIF-DEF(1chip), intelligent monitor output and IM input mode are recovered.
MTS-FILTER
Adjustment is performed in the center of the range when FILTER status is OK.
1. If data is changed from 0 to 63, point where NG > OK is A and point where OK > NG is B.
2. If data is changed from 63 to 0, point where NG > OK is C and point where OK > NG is D.
3. (A+B+C+D)/4 is the adjustment point.
SEPARTION ADJUSTMENT
1) INPUT SIGNAL 1, ADJUST BUS DATA OF M04 UNTIL THE AC VOLTAGE OF 39 PIN BECOME MINIMUM LEVEL.
2) INPUT SIGNAL 2, ADJUST BUS DATA OF M05 UNTIL THE AC VOLTAGE OF 39 PIN BECOME MINIMUM LEVEL.
3) REPEAT STEP 1) AND 2).
SET THE SOUND VOLUME TO MAXIMUM THEN MAKE SURE THE READING FROM THE SPEAKER TERMINAL MUST BE OVER THE SPEC AS SPECIFIED
OVER 25 dB (CHECKING SPEC : OVER 20 dB)
FILTER ADJUSTMENT
1) ADJUST M03 DATA UNITILL OK DISPLAY ON SCREEN ADJUST THE BUS DATA IN CENTRE OF THE RANGE.
X-RAY PROTECTION OPERATING CONFIRMATION
SET THE USER CONTROL TO SHIPMENT POSITION.
[VOLTAGE CONFIRMATION]
CHECK THE VOLTAGE OF P603 PIN 3 AS SPECIFIED BELOW.
[OPERATION CONFIRMATION]
SUPPLY THE DC VOLTAGE TO P603 PIN 3 AND MAKE SURE THE PROTECTOR IS FUNCTIONED. HORIZONTAL OSCILATION STOP AND PICTURE DISAPPEAR.
[RECOVER INFORMATION]
PULL OUT THE AC CORD.
[CAUTION]
FROM THE RECOVER CONFIRMATION MENTIONED ABOVE, THE AC CODE MUST BE PULLED OUT AT LEAST 4 SECOND BEFORE PLUGGING IN AGAIN.(IN ORDER TO MAKE SURE THE ยต-COM HAS BEEN RESET.)
TP VOLTAGE : 18.9± 1.1V DC
OPERATION VOLTAGE: 24.5V