Service Manual
Page 1
website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : LA61A MODEL : 42LB1DR-UA / 42LB1DRA-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : LA61A MODEL : 42LB1DR-UA / 42LB1DRA-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Service Manual
Page 3
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this manual to prevent Shock, Fire, or other Hazards. General Guidance An isolation Transformer should always be used during the servicing of the circuitry that may be ...
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this manual to prevent Shock, Fire, or other Hazards. General Guidance An isolation Transformer should always be used during the servicing of the circuitry that may be ...
Service Manual
Page 4
...not spray chemicals on or near this receiver or any receiver electrical plug or other electrical connection. Such components commonly are integrated circuits and some field-effect transistors and semiconductor "chip" components. Use only an anti-static type solder removal device. ... its electrical assemblies unless all other safety precautions. 8. Unless specified otherwise in the receiver. Unless specified otherwise in this service manual, lubrication of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will ...
...not spray chemicals on or near this receiver or any receiver electrical plug or other electrical connection. Such components commonly are integrated circuits and some field-effect transistors and semiconductor "chip" components. Use only an anti-static type solder removal device. ... its electrical assemblies unless all other safety precautions. 8. Unless specified otherwise in the receiver. Unless specified otherwise in this service manual, lubrication of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will ...
Service Manual
Page 16
.... (5) After adjustment is displayed. When the automatic adjustment is over , convert the Video Mode as below figure and adjust with automatic movement the Video Mode. O Manual adjustment is also possible by the following sequence. (1) HEAT RUN at least 30 minutes by pressing the right key (G ). (3) When enter the adjustment mode, displayed...
.... (5) After adjustment is displayed. When the automatic adjustment is over , convert the Video Mode as below figure and adjust with automatic movement the Video Mode. O Manual adjustment is also possible by the following sequence. (1) HEAT RUN at least 30 minutes by pressing the right key (G ). (3) When enter the adjustment mode, displayed...
Service Manual
Page 17
... adjustment mode when manufacturing the TV sets. Used as a hold key in the teletext mode To select the simultaneous screen To adjust screen tilt To manually select the channel. Use the AV To adjust the screen voltage (automatic): key to closed caption broadcasting 8 TXT To toggle on/off 2 POWER ON To...
... adjustment mode when manufacturing the TV sets. Used as a hold key in the teletext mode To select the simultaneous screen To adjust screen tilt To manually select the channel. Use the AV To adjust the screen voltage (automatic): key to closed caption broadcasting 8 TXT To toggle on/off 2 POWER ON To...
Service Manual
Page 31
... • DCR COMP Component/RGB 1 Check Si gnal format (sup port ed for mat?) Check C XA2181(IC501) Power 2 Pins, Osc, Comp 1(#41,#42,#43), Comp2(#1,#2,#17), RGB(#33,#34,#35,#36,#37) Check C XA2181(IC501) outputs 3 #23(Y_out), #22(Cb_o ut), #21(Cr_out),#15(V),#16(H) ... (IC301) HD(#96),VD(#95) Check C Y2309 (IC203) 8 REF(#1), CLKA4(#15) Check C PLD (IC301) AV Board Digit al Bo ard 1 : _Check supported format(ref. owner's manual) 2 : _Check CXA2181(IC300) power, input signal (Y_in) : (Cb_in) : (Cr_in) : Fh_Comp < Fh_Comp> 480i : 15.75KHz 480p : 31.5Khz 1080i : 33.75KHz 720P : ...
... • DCR COMP Component/RGB 1 Check Si gnal format (sup port ed for mat?) Check C XA2181(IC501) Power 2 Pins, Osc, Comp 1(#41,#42,#43), Comp2(#1,#2,#17), RGB(#33,#34,#35,#36,#37) Check C XA2181(IC501) outputs 3 #23(Y_out), #22(Cb_o ut), #21(Cr_out),#15(V),#16(H) ... (IC301) HD(#96),VD(#95) Check C Y2309 (IC203) 8 REF(#1), CLKA4(#15) Check C PLD (IC301) AV Board Digit al Bo ard 1 : _Check supported format(ref. owner's manual) 2 : _Check CXA2181(IC300) power, input signal (Y_in) : (Cb_in) : (Cr_in) : Fh_Comp < Fh_Comp> 480i : 15.75KHz 480p : 31.5Khz 1080i : 33.75KHz 720P : ...
Service Manual
Page 39
...to ensure that the CableCARD is recommended that there are no bent pins. 5. Check the CableCARD menu options. c. Troubleshooting in the User Manual. - 39 - Verify Host (TV) Operation: The installer can easily navigate through the menu choices. Check that none of a damaged ... diagnostic screens for repair. 6. CableCARD device is still unsuccessful, try to ensure that installers bring up the User Interface screen manually through the DCR TV menu screens. b. If this by cable operators and inserted into place. the customer should refer to select...
...to ensure that the CableCARD is recommended that there are no bent pins. 5. Check the CableCARD menu options. c. Troubleshooting in the User Manual. - 39 - Verify Host (TV) Operation: The installer can easily navigate through the menu choices. Check that none of a damaged ... diagnostic screens for repair. 6. CableCARD device is still unsuccessful, try to ensure that installers bring up the User Interface screen manually through the DCR TV menu screens. b. If this by cable operators and inserted into place. the customer should refer to select...