There is a problem for this receiver. When I turn on the power switch on receiver, stanby lamp shortly blinks once, but receiver is still off.
I searched forum site to fix this problem and common result was checking the protection circuit, mainly output transistor and the resistors, capacitors.
When I opened the receiver, I couldn't discriminate the protection circuit. But I can discriminate the elements such as transistor (BJT/MOSFET), resistor, capacitor and so on.
Which one is output transistor ?
Could you let me know which part is protection part ? Then I can check whether the circuit is shorted or not by myself using multimeter.
In addition, if any, could you give another cause for the problem ?
Because the warranty is over, I have to fix it. I don't want to pass it away.
Look for a large aluminum heat sink with the output transistors bolted to it. You should see anywhere from 4 or more large transistors bolted to it. I doubt that the protection circuit is malfunctioning. I would bet that it is doing exaclty what it is supposed to do. If you do find some bad output transistors, be sure to check all the components that work in conjunction with those transistors. Good luck.
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Flashing (approx. once every second): Out of paper Flashing (approx. twice every second): Mechanical error (Buzzer sounds once.) Most likely your paper feed is giving you the error. Remove the current feed, ensure there are no paper jam & insert fresh paper. If Mechanical Error :: Quick blinking Buzzer Sounds continuously for a pprox. 1 second :: Reset the Power switch Paper End Blinks.:: Buzzer Repeats a short 3-time sound twice at intervals of 0.5 second.:: Set a new paper roll. Paper Near End Blinks.(Once a second) :: buzzer Repeats a short 3-time sound twice at intervals of 0.5 second.:: Set a new paper roll.
Mechanical Error : If the printer mechanism has a greater load due to a paper jam, etc., the buzzer will sound and the SEL/ERROR lamp will blink to stop the printer mechanism. Paper End : If the printer has run out of paper, the paper sensor in the paper path near the print head will detect the end of the paper roll, turn on the buzzer, and blink the SEL/ERROR lamp to stop the printer mechanism. If the paper is inserted into the paper path, the paper will be loaded. Paper Near End : If the paper is running out, the paper near end sensor will be activated to turn on the buzzer and make the SEL/ERROR lamp blink. Even after the paper near end is detected, a command can be used to print by the specified number of lines. (See a description on the command for setting the number of print lines after paper near end detection) Finally Backup Data Clear : When the power is turned on, depending on the SEL switch operation, the backup data in the input buffer will be cleared according to the flowchart on the next page. To clear the input buffer, turn on the power while pressing the SEL switch. The following messages will be printed. "Clear Data in Buffer" "Cleared Data in Buffer" To print the data in the input buffer, simply turn the power on. The following message is printed and the data in the input buffer is printed. "Power Down(Data in Buffer)
The router's POWER lamp should be on, and steady.
The WAN lamp should be on, but blinking when the router is sending/receiving from the Internet.
The LAN lamp should be on, but blinking when the computer is sending/receiving from the router.
Disconnect the cable from the LAN port.
Turn the router off.
Turn the router on, and watch the lamps -- they all should light up, briefly, and then the WAN lamp should blink for a short time, as the router obtains a new IP-address from your ISP.
Connect the cable to the LAN port, and watch the LAN lamp blink for a short time, as the computer obtains a new IP-address from the router.
Check the lamp door switch. This switch is really cheaply made. The switch is not available. short rhe wires to fix the problem. then never change the lamp witout unplugging the ac power in the future.