Service Manuals, User Guides, Schematic Diagrams or docs for : Pioneer Pioneer_PDP_scan_IC_removal_replacement_repair_tips

<< 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



>> Download Pioneer_PDP_scan_IC_removal_replacement_repair_tips documenatation <<

Text preview - extract from the document

                Pioneer Plasma
         Scan Board & IC Troubleshooting
      Scan IC Removal & Reinstallation Guide




Technical Training Department
1925 E. Dominguez Street
Long Beach, CA 90810
           Contents
       Topic                 Page
Checking drives and          4~5
Scan IC's
Removing and                  6
reinstalling scan IC's
using nozzle type
soldering station
Removing and                  7
reinstalling scan IC's
using Chipquick

Removing blue glue           8~10
from scan IC's

Blue glue model list          11




                         3
                                              HVxxx




            Psus, Gndh
                                                                          Vh


                                 Checking drives and scan ICs

            Use static precautions. Do not operate with any connectors unplugged.
                       Replacing scan ICs in home is NOT recommended.

    If scan board is disconnected, be sure to isolate buss bar also. Discharge all scan board
                         connections including buss before reconnecting.

Unplug power connector from X or Y drive. Perform diode check with DVM from Vsus to ground.
Should check as a diode. If Y drive shorted, next unplug Scan PCBs. If short goes away, check
                            Scan ICs. If still shorted, replace drive.

With Scan PCB unplugged, perform diode check from Vh to Psus (buss bar). Should check as a
 diode. If shorted, check resistance from Vh and Gndh (buss bar) to HVxxx (each IC has 2 test
  pads). Should measure 3 to 5 meg ohm (varies by DVM). Remove IC (see SK-D04003) that
 measures different from others and recheck. If all check the same, but Vh is still shorted, you
must check all 64 HV pins of each IC. Remove side rail and 32 feed throughs are accessible near
   the panel connection. If nothing shows up, loosen Scan PCB and flip over to access all 64
                                          connections.



                                                4
   output pins




                     To check for defective scan ICs.
                     First determine which scan board has the
                     problem by doing a diode check between VH
                     and GNDH after you disconnect the ribbon
                     cable between the Y drive and the upper and
                     lower scan assy. The assy that shows a short is
                     the one with the bad scan IC

                     In some panels you must remove the blue glue
                      by using flux remover or acetone.

                     Measure (diode check) between the output pins
                     on the scan ICs and the bus bar on the scan
                     board using either an analog meter or a digital
                     meter in the manual mode. All outpins on all
bus bar              scan ICs should measure about the same
                     resistance. (~300-600 ohms). If not, that IC is
                     defective. Remove that IC and then re-check
                     VH. There can be more than one bad scan IC.




                 5
How to replace the SCAN ICs


     There are two possiblities:
     - with a nozzle type soldering station
     - with the CHIPQUICK SMD1 removal kit                 Work ESD safe
With nozzle type desoldering station


 1                                  2                                   3




       Mount the right type                Add solder to all pins                   Heat up all pins with
           of nozzle                     of the defective SCAN IC               the nozzle.When solder reflows,
                                                                                 remove IC with pick up tool



                                                                        6
 4                                  5                                       6




                                        Once the IC is positioned,
     Remove IC and clean PCB.                                                   Solder all pins and check
                                        tip it diagonal so it cannot
      Check PCB for damaged                                                     very carefully for dry joints
                                               move anymore
     patterns and short-circuits.                                                     or short circuits
                                        (Solder two opposite corners)




                                                     6
With Chipquick
Another way to remove SMDs is with a special solder made by Chip Quik.The solder is an alloy of tin, lead, indium,
and bismuth. Bismuth has a very low thermal conductivity. If it is mixed with tin, the melting point is reduced to 65

◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo