Service manual

17
LC-20B8U-S
LC-20B9U-S
LC-20B9U-SM
Page No. Item
Initial
Function
Response precautions on servicing
Value (Do not change other items than designated.)
1 MODEL A628
MODEL NAME SELECTION CANNOT BE CHANGED.
INCH SIZE 20
SCREEN SIZE SELECT (20-INCH AND USED FOR INITIALIZATION, NOT
13/15-INCH SETTINGS NOT MODIFIABLE FOR OTHER CASES.
SWITCHABLE IN CASE OF DATA FOR OTHER CASES. DATA REWRITE
DIFFERENT SYSTEMS) AND READJUSTMENT REQUIRED WHEN
WHEN INITIALIZED.
ERROR NO RESET 0
LAMP ERROR COUNT AND RESET SEE THE LAMP ERROR DETECTION.
PUBLIC MODE OFF
HOTEL MODE SETTING NOT USED
V-CHIP 1
VCHIP LINE MUTE SETTING NOT USED
EXT CONTROL OFF
BUS, UART OPEN NOT USED
ROM AND GAIBU VERSION NUMBERS DISPLAYED AT THE BOTTOM.
VIDEO ADJUSTMENT
2 COM BIAS 410
COMMON BIAS ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.
—
TAMP L 155
Y LOWER LIMIT SETTING AT TAMP ADJUSTMENT NOT USED
YDATA — DATA READ VALUE AT TAMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.
TAMP H 158 Y UPPER LIMIT SETTING AT TAMP ADJUSTMENT NOT USED
NTSC TAMP 90 TAMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.
PAL-M TAMP 96 TAMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.
PAL-N TAMP 96 TAMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.
WHITE BALANCE ADJUSTMENT
3
R CUTOFF2 0 RED CUT-OFF ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT.
G CUTOFF2 0 GREEN CUT-OFF ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT.
B CUTOFF2 0 BLUE CUT-OFF ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT.
R-GAIN 0 WHITE BALANCE ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT.
G-GAIN 0 WHITE BALANCE ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT.
B-GAIN 0 WHITE BALANCE ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT.
RGB GAMMA 1 RGB γ COEFFICIENT SETTING NOT USED
1125I/750P AD ADJUSTMENT
7 AD9883 DATA 0
AD9883 DATA WRITE AND READ NOT USED
AD9883 DATA WAIT WRITE AND READ EXECUTED NOT USED
AUTO GAIN-OFFSET1 OFF AD9883 GAIN AND OFFSET AUTO ADJUSTMENT OFF/RUN REFER TO METHOD OF ADJUSTMENT.
AD R GAIN 140 1125I, 750P INPUT RED GAIN ADJUSTMENT REFER TO METHOD OF ADJUSTMENT.
AD G GAIN 140 1125I, 750P INPUT GREEN GAIN ADJUSTMENT REFER TO METHOD OF ADJUSTMENT.
AD B GAIN 140 1125I, 750P INPUT BLUE GAIN ADJUSTMENT REFER TO METHOD OF ADJUSTMENT.
AD R OFFSET 56 1125I, 750P INPUT RED OFFSET ADJUSTMENT REFER TO METHOD OF ADJUSTMENT.
AD G OFFSET 56 1125I, 750P INPUT GREEN OFFSET ADJUSTMENT REFER TO METHOD OF ADJUSTMENT.
AD B OFFSET 56 1125I, 750P INPUT BLUE OFFSET ADJUSTMENT REFER TO METHOD OF ADJUSTMENT.
RGTAR A3 1125I, 750P INPUT RED GAIN ADJUSTMENT TARGET NOT USED
GGTAR A3 1125I, 750P INPUT GREEN GAIN ADJUSTMENT TARGET NOT USED
BGTAR A3 1125I, 750P INPUT BLUE GAIN ADJUSTMENT TARGET NOT USED
RGCAL — Y LEVEL, CHROMA CALCULATION DISPLAY NOT USED
GGCAL — Y LEVEL, CHROMA CALCULATION DISPLAY NOT USED
BGCAL — Y LEVEL, CHROMA CALCULATION DISPLAY NOT USED
ROCAL — CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY NOT USED
GOCAL — CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY NOT USED
BOCAL — CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY NOT USED
BASIC SETTING
LIST OF THE ADJUSTMENT PROCESS MODE MENU
For calling the adjustment process mode and keying in this mode, refer back to "ADJUSTING PROCEDURE OF
EACH SECTION".
DEFAULT CHART OF ADJUSTMENT PROCESS 1ST HIERARCHICAL ITEMS