ViewSonic P90F Service Manual download pdf (Page 38)

SECTION 7

SECTION 8

No OSD

Check IIC Bus (P903A to

P904). Press Enter key,

there should be a

sequential pulse appear

for IIC communication

I903 Vdd = 5V ?

YES

Check I903 and its

peripheral circuit

YES

No video

Raster exist

Check OSD (I903)

Check if Contrast is too

low ?

YES

Check R,G,B at

CDT socket

YES

Check I904 R,G,B output

Check 82V, 190V for

I904 and their peripheral

CKT

YES

Replace I904

YES

Check I904 input

Check R,G,B signals at

P901

Check IIC Bus

(P903A to P904).

Press Enter key ,

there should be a

sequential pulse

appear for IIC

communication

ViewSonic Corporation

Confidential – Do Not Copy

P90f-1

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 69 70

Service Manual 2
Revision History 3
TABLE OF CONTENTS 4
PRECAUTIONS AND NOTICES 5
SPECIFICATIONS 7
TIMING CHART 8
ViewSonic Corporation 10
13
P90f Mechanical Parts list 14
CONNECTOR PIN ASSIGNMENTS 15
MONITOR INSTALLATION 16
ADJUSTMENT 25
TROUBLESHOOTING FLOW CHART 32
SECTION 3 34
SECTION 4 35
SECTION 5 36
SECTION 6 37
REPLACEMENT PARTS LIST 39
SEMICONDUTOR 42
TRANSFORMER 45
TRANSISTOR 46
CRYSTAL 48
RESISTOR 49
P.C.B BOARD 52
SPARK GAP 52
BASE & PIN 53
ASSEMBLY PCB-PFC 54
SEMICONDUCTOR 58
ASSEMBLY CRT 61
PCB LAYOUT 66
Purity Circuit (PWB-0417) 69
PFC Circuit (PWB-0344) 70

Comments to this Manuals

No comments

ViewSonic P90F Service Manual Page 38

Comments to this Manuals

Related products and manuals for TVs & monitors ViewSonic P90F