SHARP TU-45GD1E
Service Manual

The picture is not displayed normally. (Display block)

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

but the whole screen is white for other IC4401(CPLD)? SC5301, FFC and periphery of test pattern. IC5301(DVI-Receiver).

TU-45GD1E LC-45GD1E

NO

Check the periphery of IC4001 (GAMMA-R), IC4004 (GAMMA-L) and IC4003 (E2PROM).

YES

The test pattern is displayed normally, Is pin (5) of IC2205 3.3V? Check IC2203(MICON), SC2201 but the whole screen is black for other and periphery of SC5301. test pattern. NO

Are H, V and DE output from pins NO Check the periphery of

(48), (47) (46) IC5301(DVI-Receiver) and that of IC5301=TP5301 to TP5303? SC5302.

YES

In the DC/DC2-PWB: YES NO process mode's LCD PAGE1, line in the horizontal direction. Or, normal Normal waveform is input position the defective portion does not flicker is displayed. from R4726, output TP5829 to pin 12 (CSA) of P1701. (P1701) PWB, change. R4727? (CS2) and TP5830 (*3) periphery of IC4301 (P4801) and DC/DC
NO TCON-BOTTOM: Is (CS1). (*2) (LCD-CONT) and that

periphery of IC2203 Check the harnesses (MICON), SC2201 and SC5301. between TCON-TOP When switching REV DISP of The pattern is displayed every other TCON-TOP: Is NO In the DC/DC1-PWB: NO

NO the normal waveform YES
output from R6826 and YES

Is the gradation pattern displayed NO R6827? (*1) NO Check the periphery of between IC4101(QS-DRIV-R) Check the harnesses DC/DC2-PWB: TP5831 is normally when setting PATTERN3 of X5801. and IC4102(FIFO), between TCON-TOP 16 MHz. PATTERN PAGE1 in the adjustment IC4201(QS-DRIV-L) (P4801) and process menu to 21? YES IC4202(FIFO) and their periphery. DC/DC(P1701) PWB. Check the FPC (SC6801/6802) TP7851, TP7852, TP7853 NO Check the CSPOWER IC4301(TOP-LCD-CONTROL-R) IC4302(TOP-LCD-CONTROL-L) IC4503(TOP-REF-VOL-REG) IC5805(OP-AMP) IC4504(TOP-GRAY-LEVEL)

YES

YES (SC4701/4702) CS-POWER-PWB:

Are all gradations displayed normally NO Check between IC4001(GAMMA-R) connecting the panel. and TP7854 are 8.1V,2.9V, PWB. when changing PATTERN A of and IC4101(QS-DRIV-R), between 5.7V and 5.3V respectively. PATTERN PAGE1 in the adjustment IC4004(GAMMA-L) and IC4201(QSYES process menu from 0 to 255? DRIV-L) and their periphery.

TROUBLE SHOOTING TABLE (Continued)

64
Is gradation pattern displayed The upper part of Either the left or right Check between IC4301 For displays other than the test Check between IC4001(GAMMA-R) process menu to 02? between IC4302 and SC4701. abnormal.

YES IC4505(TOP-REF-VOL-REG) IC5802(CPLD)

IC5806(OP-AMP)

YES

Check peripheral circuit of IC5802, IC5805, IC5806 For displays other than the test Check between IC4004(GAMMA-L) and IC5807. IC5807(OP-AMP) pattern, left half of the screen is and SC4002, between

abnormal. IC5502(LVDS-L) SC5502 and

NO YES NO YES

FPC.

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

NO

PATTERN PAGE1 in the adjustment

pattern, right half of the screen is and SC4001, between IC5501(LVDS-R) SC5501 and

FPC. Check peripheral circuit of

NO IC4503, IC4504 and IC4505.

Check the periphery of IC5402(DVIare abnormal every other line in the Receiver). vertical direction. YES The lower part of Either the left or right Check between IC6401

YES The displays other than the test pattern

NO screen part is abnormal. and SC6802 well as

For displays other than the test YES Check between IC5301 and NO SC6801. pattern, the whole screen is abnormal. IC5401(DVI-Transmitter) and their Go to "The screen is Check peripheral circuit of partially whitish or C6601, IC6602 and IC6603. dark". IC6401(BOTTOM-LCD-CONTROL-R) IC5301(DVI-Receiver) IC4001(GAMMA-R) IC6402(BOTTOM-LCD-CONTROL-L) IC5401(DVI-Transmitter) IC4004(GAMMA-L) IC6601(BOTTOM-REF-VOL-REG) IC5402(DVI-Receiver) IC4101(QS-DRIVER-R) IC6602(BOTTOM-GRAY-LEVEL) IC5501(LVDS-Tranceiver-R) IC4102(FIFO) IC6603(BOTTOM-REF-VOL-REG) IC5502(LVDS-Tranceiver-L) IC4201(QS-DRIVER-L)

between IC6402 and

periphery.

IC4202(FIFO)

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

4.0µ/div