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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Honda Car Clock comes alive with a bang.
My digital LED display on my 1988 Honda Accord works on a cold day but dies on
hot day by failing to come when the ignition is turned on. Gently, I bang really hard on the dashboard then it comes alive until the next day. I notice a four-watt resistor that runs really hot (could almost light a cigar) but I could trace voltages going all the way to the IC. May the IC lost ground? But how do we diagnose something when Honda doesn't provide a diagram. I like to fix this one because I have several Hondas with the same symptom. What If I use a functioning identical clock and take measurements? Parts are easy to find since I have a shoe-box filled stash of these clocks in my basement. -Thanks |
#2
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Honda Car Clock comes alive with a bang.
Look for cold solder connections on all the connections and on the
circuit board. Also check for any parts being mechanically intermittent. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "Wdyorchid" wrote in message ... My digital LED display on my 1988 Honda Accord works on a cold day but dies on hot day by failing to come when the ignition is turned on. Gently, I bang really hard on the dashboard then it comes alive until the next day. I notice a four-watt resistor that runs really hot (could almost light a cigar) but I could trace voltages going all the way to the IC. May the IC lost ground? But how do we diagnose something when Honda doesn't provide a diagram. I like to fix this one because I have several Hondas with the same symptom. What If I use a functioning identical clock and take measurements? Parts are easy to find since I have a shoe-box filled stash of these clocks in my basement. -Thanks |
#3
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Honda Car Clock comes alive with a bang.
Your advice is correct about the cold solder coonection. I'd resolder
everyhting and its working again in 2 years. I would have never attempt this. You've figured it out for me. Thank you for your help. -W Look for cold solder connections on all the connections and on the circuit board. Also check for any parts being mechanically intermittent. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "Wdyorchid" wrote in message ... My digital LED display on my 1988 Honda Accord works on a cold day but dies on hot day by failing to come when the ignition is turned on. Gently, I bang really hard on the dashboard then it comes alive until the next day. I notice a four-watt resistor that runs really hot (could almost light a cigar) but I could trace voltages going all the way to the IC. May the IC lost ground? But how do we diagnose something when Honda doesn't provide a diagram. I like to fix this one because I have several Hondas with the same symptom. What If I use a functioning identical clock and take measurements? Parts are easy to find since I have a shoe-box filled stash of these clocks in my basement. -Thanks |
#4
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Honda Car Clock comes alive with a bang.
Your advice is correct about the cold solder coonection. I'd resolder
everyhting and its working again in 2 years. I would have never attempt this. You've figured it out for me. Thank you for your help. Also look around for any leaky electrolytic capacitors. Your problem is not unique. I have a Ford Taurus with the electric florescent clock which had the same exact problems. Reflowing the joints with solder and replacing a leaky capacitor fixed it. And, there were resistors that ran hot in it, too. This is actually normal operation, although the heat is probably what helped the cracks to form in the first place. - Reinhart |
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