LL-T15G3 (serv.man6). Chapter 4 - Troubleshooting - Sharp Monitor Service Manual (repair manual)

ll-t15g3 (serv.man6) service manual
Model
LL-T15G3 (serv.man6)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
10.25 KB
Type
PDF
Document
Service Manual
Brand
Device
Monitor / Chapter 4 - Troubleshooting
File
ll-t15g3-sm6.pdf
Date

Read Sharp LL-T15G3 (serv.man6) Service Manual online

LL-T15G3
TROUBLESHOOTING
4 – 1
CHAPTER 4. TROUBLESHOOTING
No power supply
Does LED turns on in green 
when power switch is turned 
on?
No
No
No
No
No
No
LED turns on in red?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
*  Check LED for breakage.
*  Check key cable for disconnection.
No output +5V, 12V from
power supply unit.
Yes
Replace power supply unit.
Replace any unit (main PWB, SW PWB, cable) 
which shows any defect, with a new one.
1) PC is turned off?
2) RGB cable is disconnected?
3) Synchronizing signal is output from RGB 
cable?
Check whether the unit is in power save 
mode (synchronizing signal is not input.).
Synchronizing signal is input to main PWB?
Replace RGB cable 
with a new one.
LED turns on in orange?
Check power input system.
1) Power supply PWB
   *  Normal?
   *  Connected properly?
2) Blown out fuse (F1)?
3) Check +5VX, 3.3VX, 3.3VA, VDD, VD
    and VLCD are output?
4) LED
   *  Check LED for breakage.
   *  Check the path between P5 and U6.
   *  Check the cable for disconnection.
Replace any defective unit.
[ 1) Power supply PWB, 2) Main PWB, 
3) Switch PWB ] with a new one.
Backlight turns ON?
Check for RGB cable input 
signal.
Replace RGB cable.
Check each pin terminal 
of P3.
Normal
Normal
Normal
Defective
Defective
*  Check inverter PWB unit.
Note: Use caution when checking output 
side because it has a high voltage. 
Replace LCD module lamp with 
a new one.
Replace inverter PWB 
unit with a new one.
A
LL-T15G3
TROUBLESHOOTING
4 – 2
A
Screen does not operate normally.
Check RGB cable.
Defective
Replace RGB cable with 
a new one.
Check screen condition by changing display modes.
Operate the "ALL RESET" to check if screen condition changes.
(Press and hold MENU and SELECT buttons while turning on power switch.)
Screen stays in black.
Screen stays in white.
Screen jitters or on-screen 
characters flicker.
Abnormal color
Check the following signals
1) Check if module control signal is output (U1).
2) Check if VLCD voltage is output normally.
Yes
No
Yes
No
Yes
No
CLOCK and PHASE 
can be adjusted?
Does abnormal area move on 
screen when BLACK LEVEL or 
CONT is changed after H-POS 
or V-POS is set?
Switch PWB defective
Main PWB defective.
LCD panel defective.
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Here you can read online and download Sharp LL-T15G3 (serv.man6) Service Manual in PDF. LL-T15G3 (serv.man6) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp LL-T15G3 (serv.man6) Monitor. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.