 Posted: Fri Sep 29, 2006 3:09 am Post subject: Hitachi INVC551 Inverter repair |
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| Hi Olivier and others,
I was looking for information on this inverter also. It is used on several types of TFTs: COMPAQ TFT8020, ACER FP855, IBM 9794-AG1, ViewSonic VG181 and VP181. You can get a new one for $100. I had TWO failing inverters in one week and did some reverse engineering. The problem with both of them was the same: the ceramic oscillator that drives the CPU was fried. The CPU is IC1 (HD404344). Disconnect the powerplug from the inverter and measure resistance across the oscillator pins (pin 9 and 10 on the CPU), if it's below 600 Kohm, then you have found the problem. I measured about 300 ohm. Replace the oscillator by a new 3pin 4Mhz ceramic osc. Bye, Wim Huiskamp |
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| Posted: Tue Aug 16, 2005 6:11 pm Post subject: Hitachi INVC551 Inverter Board for ACER FP855 Schematic need |
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| Hi,
I'm boring searching for Schematic for Inverter Board Hitachi INVC551 found in an ACER FP855 TFT Monitor I downloaded schematics for FP855 in this Site but Inverter is not inside Please help me Thanks in advance regards Olivier [email protected] |
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