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Chassis Part Symbol Defective Circuit
ATC221 CR187
Symptom solution Error code 78, it was not the DVD or the front panel. He found a shorted cap on the Small Signal Board . It was on the DVD on line pin 6 of BR005. It should be 5 vdc but it was low, System Control found CR187 leaky it checked 30 ohms. Replace CR187 Remote not working after unit sets over night. Unit will turn on at the FPA and then the remote works OK untill it is turned off and left to sit for around a minute, then the remote will not work again untill you turn it on at the FPA. Found RP613 not in the set. installed System Control the resistor in the unit and it works properly now.
ATC221 RP613
installed missing RP613
ATC221 SK100
Error code 19, found BR001 low , unplugged BR001 and the voltage came back to 1.7 Replaced volts, BR001 pin 2 goes to the power button. Chassis detect is on pin 134 of IR001, if pin SK100 power System Control 134 held low when the unit is plugged in to AC the systems control cannot detect button