Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Monitor nokia__447ziplus_monitor_sm

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.




Image preview - the first page of the document
nokia__447ziplus_monitor_sm


>> Download nokia__447ziplus_monitor_sm documenatation <<

Text preview - extract from the document
     8. TROUBLESHOOTING FLOW CHART
(1) Power Start NG
                                             Power start NG



                                                  Is the
                       No                       voltage at
                                               C815 normal
                                               (125-340V)
                                                     ?
                     Is        Yes
                    F801                 Replace         Yes
                   open ?                 F801
                                                   Does                   Yes
                          No                       R808
                                                   open?
        Check power socket copper and
         plug & D811...D814, R805
                                                        No

                                                                  Check Q868,I862,D831,R867
                                                 Is the
                     No                         start-up
                                               voltage at
                                               C831(16V)
                                                    ?
         Check R849, R848, D870, C831,
               D831, R831,Q850                          Yes



                                                  Is the
                                                voltage of              Yes
                                               R867 normal
                                                (>1Vpp)?


                                                        No        Check secondary side circuit.
                                                                  D802~D807 or any short circuit
                                                                  on B+ output,R867 resistance
                                           Q820,Q821,Q822,
                                           Q823 and their input
                                           control logic




                   www.rtv-horvat-dj.hr
                                                   27
(2) No Video (raster appear)




                               No Video(raster appear)




                                      Are the
                No
                                   waveforms at
                                   pin 2,6,11 of
                                   I901 Normal
                                         ?
        Check signal cable,
        C901, C931, C961
                                            Yes

                                       Are the
                                   voltages at pin                 No
                                     15 of I901
                                      normal ?
                                                           Check ABL line from PCB


                                            Yes

                                       Are the
                                    waveforms at
                                   pin 35,32,29 of
                                    I901 normal ?                  No


                                                                 Is
                                                         The voltage at   pin           Yes
                                            Yes          17 of I901
                                                          normal ?

                                       Are the                                  I901 is defective
                                    waveforms at
                     No            cathode R/G/B                      No
                                   of CRT normal          Check D941
                                         ?
         Check video circuit
         voltages on
         Pin 1,3,5 of I904.
                                            Yes
         Check 12V lines
         Check 75V lines.            CRT is defective.




                 www.rtv-horvat-dj.hr
                                             28
(3) No Raster appear



                              No raster appear



                                     Is
                                 the H.V.                           Yes
                                  correct
                                     ?
                                                                Does raster
                                       No
                                                               light up with           Yes
                                                             SCREEN control
                                                             turned clockwise
                                    Is the                           ?
                               voltage at O/P                                    Reset SCREEN
          No
                              of D442 normal                            No       control.
                               (69...165V)?                       Is the
     Check B+ converter
                                                                voltage at                Yes
     CKTQ440, Q438,
                                                              heater normal
     Q439, D442                        Yes                       (6.3V) ?
                                                                                 Check brightness
                                                                     No          circuit Q495,
                                                                                 Q497, R482
                                                                                 Check spot killer
                                                            Check R930, P902     Ckt Q348, D348
                                   Is the
                                                                                 Check FBT, CRT
                               waveform at
                               Pin 1 of T430                          No
                                 normal ?
                                                                 Is the
                                                             waveforms at
                                       Yes                   Pin 26 of I401               Yes
                                                                normal ?
                          Open L440, Input 31KHz
                                                                                Check Q429,
                          signal apply 80V DC on
                                                                                D428, C427, R424
                          Pin 9 of T440                               No
                                                                                +14V to Q429
                                                              Check I401        



◦ Jabse Service Manual Search 2020 ◦ Jabse Pravopis ◦ Other service manual resources online : FixyaeServiceinfo