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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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Phillips Magnavox 60" PTV Model #: 60P8341 Chassis #:
Hello:
I have a Phillips Magnavox 60" PTV Model #: 60P8341 Chassis #: PTV915 in my shop that runs perfectly for about 30 minutes than shuts down. When it shuts down, the front panel LED blinks 2 times then off, 2 times then off, etc. When I enter the service menu, I find that error code 30 has been stored. According to my Philips data, error code 30 is a "CSP i2c error" I previously was getting error codes 7 "BC loop not stabilized", 33 "CSP dac i2c error", and 2 "Vertical protection". After resoldering some connections on the main board, changing a zener diode and electrolytic cap on the SSB board, and resetting the value of "Option Byte 2" (Which I found to have a value of 12 instead of the Philips data specified value of 181 or 183), I no longer get error codes 7, 33, and 2. I only get error code 30. What is a "CSP i2c error" (Error code 30) and what might cause it? Also, what can you tell me about error codes 7, 33, and 2? What is the purpose of "Option Byte 2" and why would it's value have been 12 instead of the normal 181 or 183? Any help would be greatly appreciated. Robert McPherson McPherson Electronics Louisville, KY |
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A Very General Explanation:
This is usually some type of communications error between a uPC, and or EPROM to a peripheral device. I cannot remember what the acronyms in this CSP i2c stand for. Maybe the tuner, or some type of controller, or some other device is loosing communications for some reason. You would have to have a way to monitor the data busses and distribution in the set to know what is failing. I am sure that the manufacture must have some type of diagnostics for this. -- Jerry G. ========================== "Robert McPherson" wrote in message om... Hello: I have a Phillips Magnavox 60" PTV Model #: 60P8341 Chassis #: PTV915 in my shop that runs perfectly for about 30 minutes than shuts down. When it shuts down, the front panel LED blinks 2 times then off, 2 times then off, etc. When I enter the service menu, I find that error code 30 has been stored. According to my Philips data, error code 30 is a "CSP i2c error" I previously was getting error codes 7 "BC loop not stabilized", 33 "CSP dac i2c error", and 2 "Vertical protection". After resoldering some connections on the main board, changing a zener diode and electrolytic cap on the SSB board, and resetting the value of "Option Byte 2" (Which I found to have a value of 12 instead of the Philips data specified value of 181 or 183), I no longer get error codes 7, 33, and 2. I only get error code 30. What is a "CSP i2c error" (Error code 30) and what might cause it? Also, what can you tell me about error codes 7, 33, and 2? What is the purpose of "Option Byte 2" and why would it's value have been 12 instead of the normal 181 or 183? Any help would be greatly appreciated. Robert McPherson McPherson Electronics Louisville, KY |
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