REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday 19 February 2019

PIONEER PDP-4270XD PDP-427XD PDP-4270XA PDP-427XA SERVICE ADJUSTMENT

PIONEER PDP-4270XD PDP-427XD PDP-4270XA PDP-427XA

                      ADJUSTMENT
  1. At shipment the unit is adjusted to its best conditions.  Normally, it is not necessary to readjust, even if an assembly is replaced.  If the adjustment is shifted of if it becomes necessary to readjust because of part replacement , perform the adjustment as described below.
  2. Any value changed in service mode will be stored in the memory as soon as it is changed.  Before readjustment, take not of its original values for reference in case you need to restore the original settings.
  3. Use a stable AC power supply.
ADJUSTMENT REQUIRED WHEN THE SET IS REPAIRED OR REPLACED.
Power supply unit  > 
Digital assembly  >
X-Main drive assembly 
X-Sub drive assembly 
Y-Main drive assembley 
Y-Sub drive assembly
Service panel assembly >
Main assembly
Sensor assembly >
Tansai assembly 
Among above, which are not followed by (>) symbol need no service adjustments after replacement.
When replacing the Main Assy', be sure to do the final SETUP
ADJUSTMENTS REQUIRED WHEN PART IS REPLACED
For the parts described in the list below, replacement is required for the whole assembly, not only the defective part.  If any part listed below is identified as defective and needs replacement, replace the whole assembly and make necessary adjustments after replacement.
The whole assembly must be replaced, because adjustments and data rewriting for the assembly at the level of production line are required.

PCB assy No.
Function name.
Ref No.
Function name
Part number

AWW124
 42 DIGITAL ASSY
IC3151
MODULE MICROCOMPUTER
AGC1011


IC3401
SEQUENCE IC
PEG239A


IC3301
FLASH MEMORY
AGC1009


IC3156
EEPROM
BR24L02FJ-W

AWW1140
SENSOR ASSEMBLY

IC3652
EEPROM
BR24L02FJ-W
AWV2318 [PDP-427XD 7 PDP-427XA]; AWV2320 [PDP-4270XA]
MAIN ASSEMBLY
IC4603
FLASH ROM
AGC1020


IC4701
AV SWITCH
R2S11002AFT


IC4901
RGB SWITCH
R2S11001FT


IC5101
MAIN VDEC
UPD64015GM-UEU


IC5103
SUB VDEC
TVP5150AM1BPS


IC5301
A/D CONVERTER
AD9985KSTZ-110


IC5403
EEPROM
BR24L02FJ-W


IC5404
EEPROM
BR24L02F J-W


IC8202
FLASH ROM
AGC1019


IC8301
FLASH UCOM
AGC1016


IC8402
FLASH ROM
AGC1018
                    
HOW TO COPY BACKUP DATA
When the digital assembly is replaced with one for service [Usual Service]
  • Copying using Factory Menu

  • After the digital assembly is replaced with one for service, be sure to check if 'NO DATA!' is set for "DIG.EEP" on the PANEL INFORMATION.
  • If copying of back up data fails in the above procedure, the Red LED lights, and the Blue LED flashes, as warning that no backup data was copied.
  • If both 'digital' and 'Sensor Assemblies' are to be replaced, first replace the 'Sensor' assembly, turn the unit ON, and back OFF again, then replace the 'digital assembly'
  • Copying using RS-232 commands
  1. Switch the RS-232C/SR+ setting to RS-232C so that RS-232C commands can be received.
  2. Turn ON the unit, using the remote control unit by issuing the 'PON' command.  Then issue'FAY' command
  3. Issue the 'BCP' command to transfer the data stored in the EEPROM for back up.
  4. Turn Power Off
  1. Plug in the AC cord, press the Power switch ON the unit to set it ON, then enter Standby Mode.
  2. Turn ON the Power, using remote control unit, then panel Factory mode.  [Panel Information > [key Dn] > ETC [key +] > [key 'Set'] > Backup Data:NoOPRT [key >>] >  Backup Data :Transfer [key 'Set' (5sec)].
  3. Turn the Power OFF.