DOWNLOAD Panasonic TH-42LF25ER / TH-47LF25ER Service Manual ↓ Size: 8.61 MB | Pages: 54 in PDF or view online for FREE

17

TH-42LF25ER / TH-47LF25ER

To avoid damaging the LCD panel, lay out a soft cloth or towel
and lay down the unit so the front side is facing down.

• Always perform the procedure below when replacing each

module.

• Be careful not to overtighten the screws when installing each

module.

If the pedestal (option) is installed, remove the 2 screws for the
pedestal on each side, and then remove the pedestal.

First remove the 10 screws on the rear cover, and then remove
the rear cover. (SCR TPG BRZ 4x10)

Boards & Parts location
This unit is designed so that removing the rear cover reveals
the configuration of the boards.

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TH-42LF25ER / TH-47LF25ER

1. The terminal section is screwed in from the outside, so

remove the screws as shown in the illustration.

2. Remove 1 screw on the jack board that screws in the

earth terminal which comes off from the left side of the
main board. (SCR PAN+SW+W 3X8)

3. Remove the 7 screws that screw the shield casing onto

the main board. (SCR PAN+SW+W 3X8)

4. Remove the coupler that is connected to the main board,

and then carefully remove the main board. Couplers on
the main board: 
K16C, KSPR, KSPL, KLVP, K16B, K16A, K8F, K72E,
K72D

5. Replace the main board with the replacement board.

• The lead wire is affixed to the shield casing on the main

board with aluminum foil tape. Re-use the shield casing
with the lead wire affixed as is.

• The gasket is affixed to both sides of the main board.

The gasket is not included on the replacement board, so
replace the gasket at the same time as well.

6. Remove the 4 screws that screw in the jack board. 

 (SCR PAN+SW+W 3X8)

7. Remove the couplers that is connected to the jack board

and carefully remove the jack board.
Couplers on the jack board: K39H, K39G, K19F, K10E,
K10D

8. Replace the jack board with the replacement board.

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TH-42LF25ER / TH-47LF25ER

1. Remove the couplers that are connected to the Power

board.
Couplers on the Power board: K601, KIV2, KIV1, K6C,
K6B, K6A

2. Remove the screws (47V type: 9 screws, 42V type: 8

screws) that screw the Power board in place. (SCR
PAN+SW+W 3X8) Pull out the boss (plastic) that holds
the Power board.

3. Remove the Power board carefully and replace it with the

replacement board. (The replacement board is equipped
with a fuse.)

1. Remove the K601 connector for the AC cord bracket from

the Power board.

2. Remove 1 screw that screws in the earth wire for the AC

cord.
Screw: SCR BIN 4X6

3. Pull out the AC cord bracket from the slit on the cabinet

back.

4. Remove the screws (Qty. 2) and nuts (Qty. 2) shown in

the illustration, and then remove the AC cord component.
Screw: SCR BRZ 3X10, Nut: NUT HEX 3

5. Replace the AC cord.

• The lead wire is affixed to the shield casing on the main

board with aluminum foil tape. Re-use the shield casing
with the lead wire affixed as is.

• The gasket is affixed to both sides of the main board.

The gasket is not included on the replacement board, so
replace the gasket at the same time as well.

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TH-42LF25ER / TH-47LF25ER

• 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.

• 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.

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".

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)

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)

• 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)