Panasonic TH-42LF25W Service Manual

Also see for TH-42LF25W: Operating instructions

Panasonic TH-42LF25W Service Manual Manual pdf 20 page image

20TH-42LF25W / TH-47LF25W8.8. Cabinet back removal (42 type)Precautions when removing and installing• Be careful not to strip the screw's thread, etc., as the screwsthat screw into the cabinet back's periphery impact the out-ward appearance.• When re-installing the rear cover, be careful which holes thewires come out from. (Refer to the wiring connection dia-gram)1. Remove the screws (Qty. 23) on the periphery of the cab-inet back. (SCR FLT 4X12)2. Remove the screws (Qty. 4) on the inside part of the rearcover. (SCR BIN 4X6)3. Remove the cabinet back carefully.8.9. Cabinet back removal (47 type)Precautions when removing and installing• Be careful not to strip the screw's thread, etc., as the screwsthat screw into the cabinet back's periphery impact the out-ward appearance.• When re-attaching the cabinet back, be careful which holesthe wires come out from. (Refer to the wiring connection dia-gram)1. Remove the screws.2. Remove the cabinet back carefully.8.10. When removing the cabinetback with the board connected1. Remove the following board couplers.Jack board: K39HMain board: KLVPPower board: KIV1, KIV22. Remove according to the previous section "Cabinet backremoval".8.11. Replacement method forspeakers1. Remove the cabinet back.2. Peel off the tape halfway that affixes the speaker lead onthe inside of the cabinet back, and then remove thespeaker lead. (Refer to the wiring connection diagram)3. Remove the screws (Qty. 4 on each side) that screw inthe speaker unit and then replace it with the repairspeaker unit. (SCR S-TPG BRZ+FLG 3.0X8.0 V)8.12. Key SW board replacement1. Remove the cabinet back.2. Peel off the tape halfway that affixes the lead wire for thekey SW board on the inside of the cabinet back, and thenremove the lead wire. (Refer to the wiring connection dia-gram)3. Remove the 4 screws and replace the key SW board.(SCR S-TPG BRZ+FLG 3.0X8.0 V)Precautions when installing• The lead wire is affixed to the shield casing on the mainboard with the earth part on the key SW board, do notforget to install so the key SW board is at a rightangle.minum foil tape. Re-use the shield casing with thelead wire affixed as is.• Secure the speaker and key SW board lead wires downonto the inside of the cabinet back with tape so they donot pop up.• When re-attaching the rear cover, be careful which holesthe wires come out from. (Refer to the wiring connectiondiagram)