DOWNLOAD Sharp LL-T2010W (serv.man20) Service Manual ↓ Size: 1.36 MB | Pages: 35 in PDF or view online for FREE

Model
LL-T2010W (serv.man20)
Pages
35
Size
1.36 MB
Type
PDF
Document
Service Manual
Brand
Device
Monitor / Complete
File
ll-t2010w-sm20.pdf
Date
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LL-T2010W
TROUBLE SHOOTING
4 – 4
(No)
Is D25 cathode at DC+2.5V?
Check the DC+2.5V power line and the 
IC22 peripheral circuits. 
(Yes)
(Yes)
Does the whole display remain black?
Is the voltage across the fuse F3 
DC+12.0V?
(No)
Check the POWER_CTRL2 signal and 
the Q4 peripheral circuits. 
(No)
(Yes)
(Yes)
Is the display size abnormal?
Is the setup item of MODE SELECT in 
the adjustment properly set?
Check X1, X3, IC15, the peripheral 
circuits, and the software. 
(No)
Adjust properly according to the display 
adjustment procedure. 
(No)
(Yes)
When the whole black display is shown 
from the signal source, is there any flicker 
of colors?
Check IC10, IC11, IC12, and the 
peripheral circuits. 
(No)
(Yes)
(Yes)
Is there any deflection or flicker on the 
LCD display?
Is the setup item of MODE SELECT in 
the adjustment properly set?
Check IC2, IC3, IC4, and the peripheral 
circuits.
(No)
Adjust properly according to the display 
adjustment procedure.
(No)
(Yes)
(Yes)
(Yes)
Is there any abnormality in colors of the 
LCD display?
Are the setup items of GAIN CONTROL 
and WHITE BALANCE properly set?
(No)
Adjust properly according to the display 
adjustment procedure.
(No)
(Yes)
Is the analog color signal output 
normal? (Pins on C7, C11, C15, C18 
side)
(No)
Check the IC1 peripheral circuits. 
(Yes)
When BRIGHT   CONTRAST of a 
gradation pattern, is the abnormal area 
shifted?
Check the IC10, IC11, and IC12 
peripheral circuits. 
(Yes)
Display the RGB color gradation of the 
output data lines of RN1~Rn12 and 
check the line corresponding to the 
abnormal color.
(No)
Is the positive side of C28 at DC+5V?
(No)
Check the L10 peripheral circuits. 
(Yes)
Are the oscillation circuits of X1 and X3 
normal? (24MHz)
(No)
Check X1, X2, and the IC15 peripheral 
oscillating circuit. 
(Yes)
Are the clock (R94) and the signal 
output of DE (R95) normal?
Check the IC17 peripheral circuits, 
CN10, CN11, and the LCD module. 
(No)
Execute
(Yes)
Continued from
4
2
LL-T2010W
TROUBLE SHOOTING
4 – 5
(No)
Are the adjustment contents saved after 
completion of the display adjustment?
Check the IC13, and IC15 peripheral 
circuits. 
(Yes)
(No)
Can inputs be switched normally?
(Yes)
There is no abnormality.
Check the IC1, IC2, IC3, and IC4 
peripheral circuits. 
Continued from
4
(No)
Is the positive side (no connection of part) 
of C145 at H level (DC+5V)?
Check the RESET circuit in the 
peripheral of IC16. 
(Yes)
(No)
Is the output of Q7 (connected with R161) 
at L level (DC+0V)?
(Yes)
Check the Q7 peripheral circuits. 
(No)
Are IC15 44PIN and 33PIN at DC+5V?
(Yes)
Check the abnormal line. 
(No)
Are the waveforms of RN30, R169, and 
R171 outputted?
Check IC8.
(Yes)
Check RN30, R169, R171 (IC5 and IC8 
control line).
5
(No)
Is the display normal with analog inputs?
First, check with analog inputs. 
(Yes)
(No)
Is DC+5V applied to CN2-14PIN?
(Yes)
Check CN2 and the signal source. 
(Yes)
Are the signal levels of CN2-1PIN, 2PIN, 
9PIN, 10PIN, 17PIN, 18PIN 23PIN, and 
24PIN changed?
(No)
IC8 abnormality
(No)
When resolution is changed, are the 
waveforms of IC7-1PIN and 2PIN 
changed normally?
Check IC7 and IC8.
(Yes)
Check the IC7 peripheral circuits. 
PC display does not work. (Digital DVI)
LL-T2010W
TROUBLE SHOOTING
4 – 6
(No)
Is the unit connected to the analog input 
CN1?
Connect the firmware upgrade jig to the 
analog input CN1. 
(Yes)
(No)
Is a jig connected to CN3?
Connect the jig to CN3. 
(Yes)
(No)
Are CN3-1PIN, 2PIN, and 3PIN at the 
same potential?
Check CN3 and the jig connected to 
CN3. 
(Yes)
(No)
Are CN3-1PIN, 2PIN, and 3PIN at 
DC+12V?
Check R173 and the 12V line from the 
DCJACK PWB.
(Yes)
(No)
Is the output of Q18 at L (DC0V)?
Check the Q18 peripheral circuits. 
(Yes)
(No)
Is WRPG_SEL at DC+5V?
Check the R179~R181 peripheral 
circuits. 
(Yes)
(No)
Are IC6-1PIN and 13PIN changed 
properly?
(Yes)
Check IC15-31PIN, 32PIN, 33PIN, 35PIN, 
and 44PIN. (IF there is no abnormality, 
IC15 is defective.)
Check the IC6 peripheral circuits. 
Firmware upgrade cannot be made. 
LL-T2010W
WAVE FORM
5 – 1
CHAPTER 5. WAVE FORM
Waveform measurement condition: Input each display pattern and check the waveform (timing chart).
Note:
Waveform figure
Waveform 1. XIN1 (IC15-21PIN)
Frequency: 24MHz
Display: Option
Waveform 2. XIN2 (X3's PIN on C111 side)
Frequency: 24MHz
Display: Option
Waveform 3. VSYNC (R74)
Frequency: 60Hz
Display: Option
Waveform No.
Measuring point
Name of measured waveform 
Display pattern
1
IC15 21PIN
XIN1
Option
2
X3's PIN on C111 side
XIN2
Option
3
R74
VSYNC
Option
4
R76
HSYNC
Option
5
R94
LCD CLK
Option
6
R95
LCD DE
Option
7
IC17 29, 30, 41, 42PIN
LVDS CK
Option
8
RN1~RN12
LCD DATA
Pattern in every 2 lines of black and white
9
RN1~RN12
LCD DATA
Pattern in every 2 lines of black and white
10
IC8 side of C7, C11, C15
RGB OUT
Black-and-white, 16-gradation pattern
11
IC10, 11, 12: 2, 3, 5, 6, 8, 9, 11, 12, 
39, 40, 42, 43, 45, 46, 48, 49PIN
SDRAM I/O DATA
Pattern in every 2 lines of black and white
12
IC10, 11, 12: 2, 3, 5, 6, 8, 9, 11, 12, 
39, 40, 42, 43, 45, 46, 48, 49PIN
SDRAM I/O DATA
Pattern in every 2 lines of black and white
(1)
Use a probe of Tektonix P6139A.
(2)
Reception mode: VESA, 1600 x 1200
H: 75kHz  V: 60Hz  DOTCLK: 160MHz
Oscilloscope Tektronix TDS744B
Input signal
VESA 1600 x 1200
H: 75kHz  V: 60Hz
DOTCLK: 160MHz
GND
2V/DIV, 20ns/DIV
 
2V/DIV, 20ns/DIV
GND
 
2V/DIV, 20ns/DIV
 
GND
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