SHARP LC-45GD4U
Manual de Servicio

The picture is not displayed normally.

YES NO The test pattern is displayed, Is VSYNC normally input to pin (2) of Check SC2201, periphery YES

but the whole screen is white for other IC4401? of SC5301, FFC and displays. periphery of IC5301.

NO

Check IC4003, IC4001 and periphery of IC4004.

YES

The test pattern is displayed normally, Is pin (5) of IC2205 3.3V? Check IC2203, IC2201 and but the whole screen is black for other periphery of SC5301. displays. NO

NO Are H, V and DE output from TP5301 Check the periphery of YES
Check the harnesses between Top LCD NO

to TP5303? IC5301 and that of SC5302.

Check SC2201, periphery of SC5301, FFC and periphery of IC2203. When switching REV DISPLAY of the The pattern displayed every other YES Normal waveform is input NO

NO Controler and DC/DC process mode�s LCD PAGE1, line in the horizontal direction. Or, from R4726, output TP5829 and to pin (12) of P1701. (*3) PWB, periphery of position of the defective portion does not flicker is displayed. R4727, R6826 and TP5830. (*2) IC4301 and that of P4801.
NO YES

YES change. R6827. (*1)

NO YES

Check the harnesses TP5831 is 16 MHz. between Top LCD PATTERN PAGE1 in the adjustment their periphery. Controller and DC/DC YES process menu to 21? PWB.

NO Check the periphery of Is the gradation pattern displayed NO

between IC4101 and IC4102, Check the FPC X5801. normally when setting PATTERN3 of between IC4201 IC4202 and connecting the panel.

YES

5.7V and 5.3V respectively. when changing PATTERN A of between IC4004 IC4201 and PATTERN PAGE1 in the adjustment their periphery. YES process menu from 0 to 255?

NO Check the CSPOWER TP7851, TP7852, TP7853 and TP7854 are 8.1V,2.9V, PWB.

Are all gradations displayed normally NO Check between IC4001 and IC4101,

TROUBLE SHOOTING TABLE (Continued)

45
Is gradation pattern displayed The upper part of Either the left or right YES Check between IC4301 For displays other than the test Check between IC4001 and SC5501 and FPC. between IC4302 and NO SC4701. abnormal. The lower part of Either the left or right Check between IC6401

YES

Check IC5802, IC5805,

For displays other than the test Check between IC4004 and IC5807. pattern, left half of the screen is SC4002, between IC5502 and abnormal. SC5502 and FPC.

YES IC5806 and periphery of

NO YES NO

YES normally when setting PATTERN1 of screen part is abnormal. and SC4702 well as

NO

PATTERN PAGE1 in the adjustment

process menu to 02? Check IC4503, IC4504 and

pattern, right half of the screen is SC4001, between IC5501 and

NO

The displays other than the test pattern YES periphery of IC4505. are abnormal every other line in Check the periphery of IC5402. vertical direction. YES

YES
between IC6402 and NO

NO screen part is abnormal. and SC6802 well as

For displays other than the test YES Check between IC5301 and IC5401 SC6801. pattern, the whole screen is abnormal. and their periphery. Go to "The screen is Check IC6601, IC6602 and partially whitish or periphery of IC6603. dark".

NO

LC-45GD4U

2V/div (*1) (*2) (*3) 4.0 /div