Panasonic TX-28LD2P, Service Manual

Page 1: ...ard PC to allow a number of diagnostic and control functions to be performed For more details contact your local Panasonic company BACK TX 28LD2P Service Manual Safety Specifications Block Diagrams Schematic Diagrams PCB Views Self Check Service Information Parts List Service Hints Disassembly Location of Controls Waveforms Mechanical View Adjustments ...

Page 2: ...BACK BACK BACK Video Audio Control B PCB E PCB Y PCB B Schematic P Schematic E Schematic Y Schematic ...

Page 3: ...UPV N 5 SLQ 9 287 9LGHR SLQ 9 S S XGLR SLQ P9 UPV N 9 1 6 9LGHR 1 9 S S 9LGHR SLQ 9 S S XGLR SLQ P9 UPV N 6 9LGHR 1 9 S S SLQ 9 S S 9 287 9LGHR SLQ 9 S S XGLR SLQ P9 UPV N 6HOHFWDEOH RXWSXW SLQ 9 1 SLQ 9 S S XGLR 5 P9 UPV N 9LGHR 5 9 S S LJK 9ROWDJH N9 á N9 DW HUR EHDP FXUUHQW 3LFWXUH 7XEH 9LVLEOH VFUHHQ VL H FP 0HDVXUHG LDJRQDOO XGLR 2XWSXW QWHUQDO 6SHDNHU 0XVLF 3RZHU PSHGDQFH HDGSKRQHV PSHGDQFH ...

Page 4: ...UHG SOXJ DQG HDFK H SRVHG PHWDOOLF FDELQHW SDUW RQ WKH UHFHLYHU VXFK DV VFUHZ KHDGV DHULDOV FRQQHFWRUV FRQWURO VKDIWV HWF KHQ WKH H SRVHG PHWDOOLF SDUW KDV D UHWXUQ SDWK WR WKH FKDVVLV WKH UHDGLQJ VKRXOG EH EHWZHHQ 0 RKP DQG 0 RKP KHQ WKH H SRVHG PHWDO GRHV QRW KDYH D UHWXUQ SDWK WR WKH FKDVVLV WKH UHDGLQJ PXVW EH LQILQLWH 855 17 27 3OXJ WKH FRUG GLUHFWO LQWR WKH RXWOHW R QRW XVH DQ LVRODWLRQ WUDQ...

Page 5: ...7 3 2 7 21 2 21752 6 LJ 2 86 6 5 1 6 59 176 2 72 5 029 7 5 5 29 5 5HPRYH WKH VFUHZV DV VKRZQ LQ LJ LJ LJ 6 5 6 6 5 LJ ...

Page 6: ... WKH PHPRU SDFN R LQWR WKH 6HUYLFH 0RGH DV H SODLQHG DERYH 7KH VFUHHQ ZLOO VKRZ WHUQDO 79 3URJUDP 3UHVV WKH EOXH EXWWRQ RQ WKH UHPRWH FRQWURO 7KH VFUHHQ ZLOO VKRZ 3URJUDP 79 WHUQDO 3UHVV WKH 6725 EXWWRQ RQ WKH 79 7KH VFUHHQ ZLOO VKRZ 6WRULQJ OO WKH WXQLQJ LQIRUPDWLRQ VWRUHG LQVLGH WKH 79 ZLOO QRZ EH WUDQVIHUUHG WR WKH 0HPRU 3DFN 7KLV SURFHVV ZLOO WDNH PLQXWHV WR FRPSOHWH DQG ZKHQ ILQLVKHG WKH VFUH...

Page 7: ...W XWRII PRGH RQILUP WKHQ YDOXH LV DQG VHOHFW 8J PRGH QRWLQJ FRORXU ZLWK ODUJHVW YDOXH 7XUQ WKH VFUHHQ 95 XQWLO D FRORXU UHDFKHV RQQHFW DQ RVFLOORVFRSH WR WKH FDWKRGH ZLWK WKH ELJJHVW YDOXH FRORXU 6HOHFW XWRII PRGH DQG DGMXVW XWRII SXOVH WR 9 9 LVFRQQHFW WKH RVFLOORVFRSH DQG DGMXVW WKH VFUHHQ WR ZKLFKHYHU FRORXU UHDFKHV ILUVW 6 6HOI FKHFN LV XVHG WR DXWRPDWLFDOO FKHFN WKH XV LQHV DQG H DGHFLPDO FRG...

Page 8: ...WLQJ 7UDSH LXP FRPS 75 3 2SWLPXP VHWWLQJ RORXU 9 2 RORXU 9 2 3UHVV HLWKHU OXH RU HOORZ EXWWRQV WR HIIHFW DXWRPDWLF DGMXVWPHQW XW RII XW RII 1RW WR EH DGMXVWHG 8J 7HVW 8J 7HVW 6HOHFW XWRII LQ 6HUYLFH 0RGH PRGH DQG FRQILUP WKH YDOXH LV 6HOHFW 8J 7HVW QRWLQJ FRORXU ZLWK ODUJHVW YDOXH DGMXVW RQ 7 XQWLO D FRORXU UHDFKHV RQQHFW DQ RVFLOORVFRSH WR WKH FDWKRGH RI WKH ELJJHVW YDOXH FRORXU VHOHFW XWRII PRGH...

Page 9: ...3 1 X VHF GLY 3 1 X VHF GLY 3 1 P VHF GLY 3 1 P VHF GLY 6 4 X VHF GLY 3 1 P VHF GLY 6 4 X VHF GLY 3 1 P VHF GLY 3 1 P VHF GLY 5 1 5 9 Y 5 5 9 Y 3 1 X VHF GLY 2 725 4 X VHF GLY 3 1 X VHF GLY 3 1 X VHF GLY KURPD 9 250 3 77 51 7 8 5 9 Y 3 1 P VHF GLY 0 77 5 4 0 77 5 4 0 77 5 4 ...

Page 10: ... 4 4 5 9 5 4 0 3 7 8 1 5 7 5 9 2 0 2 8 7 2 5 4 8 5 4 8 5 4 8 5 4 8 5 4 8 5 9 6 7 9 2 3 5 2 6 6 2 5 7 7 7 0 0 2 5 5 0 3 6 7 2 9 0 2 6 4 8 5 4 8 5 4 8 5 4 0 3 4 0 3 4 0 3 4 0 3 4 0 3 4 0 3 4 2 8 7 3 8 7 0 3 4 2 8 7 3 8 7 0 3 4 2 8 7 3 8 7 0 3 9 2 2 5 0 ...

Page 11: ...0 8 7 6 1 8 2 2 5 0 ...

Page 12: ... 3 7 4 5 9 5 4 1 2 8 7 3 8 7 3 6 8 2 1 7 5 2 7 9 5 4 7 9 5 3 5 2 6 6 2 5 6 2 8 1 3 5 2 6 6 2 5 5 2 0 3 5 2 5 0 0 0 2 5 0 5 2 3 5 2 6 6 2 5 2 1 7 5 2 9 5 9 5 9 2 3 5 2 6 6 2 5 7 7 0 0 2 5 7 7 7 5 6 7 3 5 2 0 0 0 2 5 9 6 7 1 7 8 1 5 7 9 6 32 5 6833 1 21752 2 5 0 ...

Page 13: ...7 3 127 7KH QXPEHUV RQ WKH H SORGHG YLHZ EHORZ UHIHU WR WKH PLVFHOODQHRXV VHFWLRQ RI WKH 5HSODFHPHQW 3DUWV LVW 3 2 9 ...

Page 14: ... 73 86 21 27720 80 3 77 5 6 7 3 7256 7 9 05 7 9 89 6 0 3 9 Q 0 7 9 S 0 7 9 89 6 0 3 9 Q 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 05 7 9 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 5 7 9 0 7 9 S 89 6 0 3 9 Q 89 6 0 3 9 Q 0 7 9 S 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 0 7 9 89 6 0 3 9 Q 0 5 ...

Page 15: ...0 5 0 9 Q 3 725 5 0 9 S 8 7 9 7 9 7 9 5 0 9 S 7 9 8 7 9 89 6 0 3 9 Q 89 6 0 3 9 Q 0 7 9 S 26 7 9 0 7 9 S 89 6 0 3 9 S 90 7 9 S 0 7 9 89 6 0 3 9 Q 0 5 7 9 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 S 5 0 9 Q 5 0 9 Q 89 6 0 3 9 S 8 7 9 0 7 9 S 0 7 9 S 0 7 9 S 8 7 9 0 7 9 S 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 0 5 7 9 89 6 0 3 9 Q 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 ...

Page 16: ...3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 S 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 S 89 6 0 3 9 S 89 6 0 3 9 Q 0 7 9 S 89 6 0 3 9 Q 89 6 0 3 9 Q 89 6 0 3 9 Q 0 7 9 0 7 9 89 6 0 3 9 Q 89 6 0 3 9 Q 0 7 9 Q 89 6 0 3 9 Q 2 6 0 73 2 5 4 7 2 5 4 7 2 0 7 2 66 7 0 7 2 0 7 2 0 7 2 66 7 0 7 2 66 7 0 7 2 66 7 0 2 0 7 2 66 7 0 7 2 66 7 5 9 2 0 6 2 0 2 0 7 2 66 7 8 2 5 2 79658 0 2 8 9 2 0 7 2 66 7 0 7 2 66 7 0 ...

Page 17: ... 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6...

Page 18: ... 7 5 2 7 5 2 6 9 2 5 9 2 5 9 2 61 5 2 6 7 2 75 16 67256 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 6 67 75 16 6725 4 6 67 75 16 6725 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 75 16 6725 25 6 7 4 6 75 16 6725 4 6 75 16 6725 4 6 75 16 6725 4 7...

Page 19: ...5 5 5 281 5 5 5 7 5 21 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 3 0 7 5 5 3 0 7 5 5 3 0 7 5 5 7 5 21 5 5 7 5 21 5 5 7 5 21 5 5 6 7 5 21 5 5 6 7 5 21 5 5 6 7 5 21 5 5 7 5 21 5 5 ...

Page 20: ... 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 54 86 5 54 86 5 5 7 5 21 5 5 7 5 21 5 5 7 5 21 5 5 6 5 21 5 5 7 5 21 5 5 7 5 5 21 5 5 5 6 5 21 5 5 7 5 5 21 5 5 5 6 5 21 5 5 6 5 21 5 5 6 0 5 5 5 6 0 5 5 54 5 86 5 5 54 3 0 7 5 54 0 7 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0...

Page 21: ...5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 5 21 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0 5 5 5 6 0...

Page 22: ...SRVLWLRQ QGLFDWHV WKH 9LGHR VLJQDO SDWK QGLFDWHV WKH XGLR VLJQDO SDWK QGLFDWHV WKH 9HUWLFDO RUL RQWDO VLJQDO SDWK 7KLV VFKHPDWLF GLDJUDP LV WKH ODWHVW DW WKH WLPH RI SULQWLQJ DQG LV VXEMHFW WR FKDQJH ZLWKRXW QRWLFH 5HPDUNV 7KH 3RZHU LUFXLW FRQWDLQV D FLUFXLW DUHD ZKLFK XVHV D VHSDUDWH SRZHU VXSSO WR LVRODWH WKH HDUWK FRQQHFWLRQ 7KH FLUFXLW LV GHILQHG E 27 DQG 2 LQGLFDWLRQV LQ WKH VFKHPDWLF GLDJUDP...

Page 23: ......

Page 24: ......

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ......

Page 29: ......

Page 30: ......