panasonic euro 4 tech bulletin free download

File name euro_4_tech_bulletin.pdf

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