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panasonic_euro_4_tech_bulletin


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                                      SUBJECT: Q551 Horizontal output transistor.
          PANASONIC                   BACKGROUND: Possible failure of Q551 on 28" Euro 4 Models
         CHASSIS Euro-4               REMEDY: Change transistor type and resistor value, in the following
                                              configurations only, using this kit.
             Models
                                      NOTE: When replacing Q551 apply Heat Sink Compound between
TX21MD4 TX25MD4 TX25XD4/A TX25LD4DP         Q551 and heat sink.
    TXW28R4 TXW28R4DP TXW28R4L
                                      A: Model TX21MD4 TX25MD4 TX25XD4/A TX25LD4DP
    TX28MD4 TX28MD4L TX28LD4DP                 Replace Q551 Part No BU2508AXLB with BU2508AXLB
  TX28LD4DPL TX28XD4/A TX28XD4L/A              (No Change)
                                      B: Model TXW28R4 TXW28R4DP TXW28R4L
                                               Replace Q551 Part No BU2508AXLB with 2SD1577LB
                                      C: Model TX28MD4 TX28MD4L TX28LD4DP TX28LD4DPL
                                              TX28XD4/A TX28XD4L/A

                                      1. Replace Q551 Part No BU2508AXLB with 2SD1577LB
                                      2. Change value of R507 from 270 ohms 1watt Part No (ERG1FJ271)
                                         to 100 ohms 1watt Part No (ERG1FJ101)


                                                  Description                 Order Code
                                      Q551 Transistor BU2508AXLB
                                      Q551 Transistor 2SD1577LB
                                      R507 Resistor 100 ohm 1watt
                                               KIT ALL ABOVE ITEMS.             33000YR



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