ViewSonic PJ452 Service Manual - Page 40

Removes POWER BOARDCIRCUIT

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2. Cautions when removing the PWB assembly MAIN When removing the PWB assembly MAIN, there is danger of damaging the connector connecting cables. (1) Disconnect 13 cables and remove 3 screws. 3 screws PWB assembly MAIN (2) Lift up the rearward of the PWB assembly MAIN to the front, while pushing rear portion of bottom case toward the outside so that the terminals of MAIN board may not be caught in bottom case. And then disconnect cable and unscrew the earthing wire. FRONT Unscrew the earthing wire PWB assembly MAIN Lift up earthing wire Disconnect the cable REAR 3.Removes POWER BOARD(CIRCUIT) (1) Unscrew 3 screws, and then get the BALLAST-BRACKET off. Lamp lead Screw Disconnect the lamp lead, and the cable CN1 from the POWER UNIT(ballast). ViewSonic Corporation Confidential - Do Not Copy 37 PJ452

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2. Cautions when removing the PWB assembly MAIN
When removing the PWB assembly MAIN, there is danger of damaging the connector connecting cables.
(1) Disconnect 13 cables and remove 3 screws.
(2)
Lift up the rearward of the PWB assembly MAIN to the front, while pushing rear portion of bottom case
toward the outside so that the terminals of MAIN board may not be caught in bottom case. And then dis-
connect cable and unscrew the earthing wire.
PWB assembly MAIN
3 screws
FRONT
Disconnect the cable
earthing wire
PWB assembly MAIN
REAR
Lift up
Unscrew the earthing wire
3.Removes POWER BOARD(CIRCUIT)
(1) Unscrew 3 screws, and then get the BALLAST-BRACKET off.
Screw
Lamp lead
Disconnect the lamp lead, and the cable CN1 from the POWER UNIT(ballast).
ViewSonic Corporation
Co
nfidential
- Do Not Copy
P
J452
37