Question about Hitachi 60SBX78B 60" Rear Projection Television

4 Answers

Hitachi 60sbx78b Won't Turn ON...need advise

I have experience with electronics and circuits, but not tvs. It tries turning on, can hear the speaker amp turn on, then it tries turning on the tubes, but turns off right away. Then red light blinks on power board after it gives up. All the green LED lights come on except the +B 120v. And there is no voltage to the +B on the flyback. Could it just be a regulator out, or could something it be shorting? Are those IC's on the heatsinks next to the green test lights switching transistors or regulators ?
Or maybe somebody could point me in the direction to obtain a cheap schematic or repair manual. Thanks.

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  • x_x_5150_x_x Jan 28, 2008

    well, i found a cheap repair manual, waiting to hear back from the place.

  • x_x_5150_x_x Jan 28, 2008

    well, i might not need anybody's help. after hours of searching google i found somebody with the exact same problem and got this answer, i will check these 2 components next:

    "yes the most common problem for this is a pico fuse opens it is labeled E994. it is bad most likely because C707 is bad. in some cases the horizontal output will go bad because you have a bad flyback transformer and this also will blow E994, but 90% chance it is C707."

  • elimitator Feb 20, 2008

    Where is C707, E994???

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I have a Hitachi 60 UX 54 B....problem am having is: when I turn on the tv it stays on for about a minute, clicks off by itself, have to disconnect from wall wait about 2 to 5 minutes plug back in, if am lucky it stays on but if am not have to repeat the whole process again until it stays on....could the problem be the C707 and pico fuse like mentioned above....even though it is a different model number? Thanks Guys....Becky from Texas

Posted on Jan 28, 2010

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I had the same problem. the fix was to replace capacitor C707 and pico fuse E994. After replacing those two parts TV works fine. fcs0998@aol.com GENE

Posted on Aug 16, 2009

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  • Master
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If cap value is 1000 pf ( 102k ) 2KV, beef it up ! I use Sony part # 1-161-754-00 ....102k 3KV.......Note: sometimes shorted cap
is hiding under dried gob of placement glue............
Make sure pico fuse is correct amperage.......T.

Posted on Jan 29, 2008

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  • Hitachi Master
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You can get the parts from www.TvRepairKits.com. They have put together a kit that includes the parts and instructions to fix the following models (50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B). The kit includes the E994 pico fuse and the C707 capacitor.

Posted on Nov 02, 2008

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Posted on Jan 02, 2017

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Other Possible Symptoms : The green LEDs on the circuit board light up for a few seconds then turn off.

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Primary Symptom: No Audio or Video. Power light will come on briefly then shut off.
Other Possible Symptoms : The green LEDs on the circuit board light up for a few seconds then turn off.

Hope this helps,

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