Thomson JL8006A PVR - shorted +12V rectifier
Some time ago, I got a Thomson JL8006A PVR which could not power on.
Measuring the voltages of the power supply revealed a very low +5V output and no +12V output (mainly consumed by the hard drive); further investigation revealed that D6 (HER504 - 5A, 400V) on the +12V rail has become short-circuited.
Replacing this diode with an MBR745 (7A, 45V in a TO-220 package) and adding a heatsink to it (for extra reliability) fixed this problem - the +5V rectifier is a SBT1060CT, also in a TO-220 package.
Measuring the voltages of the power supply revealed a very low +5V output and no +12V output (mainly consumed by the hard drive); further investigation revealed that D6 (HER504 - 5A, 400V) on the +12V rail has become short-circuited.
Replacing this diode with an MBR745 (7A, 45V in a TO-220 package) and adding a heatsink to it (for extra reliability) fixed this problem - the +5V rectifier is a SBT1060CT, also in a TO-220 package.
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