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[P1875 Service Manual
8-4 INSPECTION PROCEDURE
1) Hi-Pot Test :
Hi-Pot Specification : 1.5K VAC, 10mA, 2 seconds.
2) Noise Test :
Incline 30° to the left and right to check whether there is strange noise.
3) Function Test I :
(a).
Connect PC, Video, S-Video, Audio signal and extension speaker with PJ875.
(b).
Press source button to switch to PC signal.
@ Make sure the image is normal.
(c).
Press Pip button on the remote controller.
@ Make sure the video signal appears on PC signal.
(d).
Press Pip button to cancel Pip function.
(e).
Press source button to switch to Video signal.
@ Make sure the image is normal.
(f).
Press source button to switch to S-Video signal.
@ Make sure the image is normal.
(g).
Press Menu button for 4 times to enter Audio Function OSD.
@ Select Volume function and make sure the function works normally.
@ Select Mute function and make sure the function works normally.
@ Select Stereo/Mono function and make sure the function works normally.
(h).
Disconnectthe extension speaker.
@ Make sure the internal speaker works normally.
4) Function Test IT :
(a).
Connect PC signal with PJ875.
c® Fine Line Morie Pattern :
- Make sure the noise can be eliminated by Tracking function.
- If there is line bar appearing, make sure it can be eliminated by Frequency
function.
c® Boundary Frame Pattern :
- Make sure the boundary can be displayed.
c® Press Menu button to enter Display Function OSD:
- Make sure Keystone function works properly.
' Confidential - Do Not Copy :
_ ViewSonic Corporation _
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