Toshiba f97e904 Service Note

BSI(Service Note) TOSHIBA

TOSHIBA TEC CORPORATION

2-4-1, Shibakoen, Minato-ku, TOKYO, 105-8524 JAPAN

BSI No

F97E904

SUBJECT

LCD Backlight ( Availability as a Service Part )

MODEL

CATEGORY

Available as a service part,
Treatment in the field

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CONTENT

The LCD (6550 series) backlight has been available as a service part. Replacement instructions are
as follows.

< Replacement instructions >

( 1 ) Remove the control panel from the copier.
( 2 ) Remove the LCD unit (LCD-DSP-150) from the control panel.

5540, 6550, 7550, 7650

FIELD APPLICATION

To be applied when necessary

FACTORY APPLICATION

Date

97/06/10

UNIT

Display Unit

DTM-F7303

A

Fig. 1 (LCD unit)

( 3 ) Stretch out the caulked portions (10 places) of the metal-frame so that it is flat.

( 4 ) Place the LCD unit display screen with face "A"(Fig.1) downward on a table and take out the PC

board upwards.

Caulked Portions (10 places)

Fig. 2 (metal-frame)

BSI No. F97E904 Page 2

Fig. 3 (PC board)

( 5 ) Remove the backlight unit (CFL-DSP-150).
Note : When removing the backlight unit, be careful not to move the rubber

connector.

Fig. 4 (Backlight unit)

Fig. 5 (Rubber connector)

( 6 ) Install a new backlight unit.
( 7 ) When installing the metal-frame(Fig.2) to the LCD panel, push the metal-frame as that it could

be contacted the window of the LCD panel.

Window

Fig. 6 (LCD Panel)

( 8 ) Reinstall the PC board. (Carefully aligning the positions of the PC board holes with the caulked

portion of the metal-frame, insert it.)

( 9 ) While fixing the PC board, bend the caulked portion of the metal-frame back to their original

shape.
( 10 ) Install the LCD unit in the control panel.
( 11 ) Install the control panel in the copier, turn the power on and then check that the display is

normal. (If the display is abnormal, repeat steps 1 to 10 and check again.)

< NOTE >

1. As stated above it is assumed that static electricity during handling results in damage to the IC

which adversely affects the display.
Service man should be provided with sufficient earthing to avoid the creation of static electricity
as much as possible.