Cabinet Back Removal (42 Type); Cabinet Back Removal (47 Type); When Removing The Cabinet Back With The Board Connected; Replacement Method For Speakers - Panasonic TH-42LF20U Service Manual

TC-42LF20U / TC-47LF20U
8.8.

Cabinet back removal (42 type)

Precautions when removing and installing
• Be careful not to strip the screw's thread, etc., as the screws
that screw into the cabinet back's periphery impact the out-
ward appearance.
• When re-installing the rear cover, be careful which holes the
wires 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 rear
cover. (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 screws
that screw into the cabinet back's periphery impact the out-
ward appearance.
• When re-attaching the cabinet back, be careful which holes
the 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 cabinet
back with the board connected
1. Remove the following board couplers.
Jack board: K39H
Main board: KLVP
Power board: KIV1, KIV2
2. Remove according to the previous section "Cabinet back
removal."
8.11. Replacement method for
speakers
1. Remove the cabinet back.
2. Peel off the tape halfway that affixes the speaker lead on
the inside of the cabinet back, and then remove the
speaker lead. (Refer to the wiring connection diagram)
3. Remove the screws (Qty. 4 on each side) that screw in
the speaker unit and then replace it with the repair
speaker unit. (SCR S-TPG BRZ+FLG 3.0X8.0 V)

8.12. Key SW board replacement

1. Remove the cabinet back.
2. Peel off the tape halfway that affixes the lead wire for the
key SW board on the inside of the cabinet back, and then
remove 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 main
board with the earth part on the key SW board, do not
forget to install so the key SW board is at a right
angle.minum foil tape. Re-use the shield casing with the
lead wire affixed as is.
• Secure the speaker and key SW board lead wires down
onto the inside of the cabinet back with tape so they do
not pop up.
• When re-attaching the rear cover, be careful which holes
the wires come out from. (Refer to the wiring connection
diagram)
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