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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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CD Player Display and Button Problem
I was wondering if anyone could help diagnose a problem with a Clarion
DRX9255 car cd player. The deck turns on and all the front panel buttons light, but the display (vacuum fluorescent) is blank. It takes in a cd and spins it, but there's no signal on the audio outputs. It also doesn't respond when any of the buttons are pressed, except for the eject button.. which beeps and ejects the cd when pressed. The power can still be turned on and off. It's a newer deck, but the face is non-detachable and it has a true (shaft type) analog volume that's also the power on/off control. I tried the microcontroller reset button, and the deck clicks off and back on, but still the same problem. After reading the repair FAQ and searching the forums, I'm thinking it could be the microcontroller or a power supply problem. Does this sound likely, or could it be something else? The deck has a large outboard +/-15v DC-DC converter with power and ground inputs, and then six wires going out to the deck: In: yellow, black Out: yellow, black, blue/yellow, black/white, yellow/red, yellow/black All the connectors and wires test out ok. How should I go about testing the power supply? From what I can tell, black and black/white are both grounds, yellow is constant 12v memory to the deck, and blue/yellow is remote turn-on for the converter. I checked the other two wires for voltage with the deck on and got nothing on the yellow/red, and 0.1v on the yellow/black. Also I can hear the converter "motorboat" or hum quietly when it's on. Is this normal? Any help or suggestions would be greatly appreciated. Thanks, Eric |
#2
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CD Player Display and Button Problem
I would think at this point you will need to order the service manual from
Clarion, if they would sell it to you. Once you get past the power supply, you will require the proper test gear and tools to follow through to troubleshoot your unit. If this is a low cost unit, I would consider retiring it. -- 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 ========================================= "Eric J" wrote in message om... I was wondering if anyone could help diagnose a problem with a Clarion DRX9255 car cd player. The deck turns on and all the front panel buttons light, but the display (vacuum fluorescent) is blank. It takes in a cd and spins it, but there's no signal on the audio outputs. It also doesn't respond when any of the buttons are pressed, except for the eject button.. which beeps and ejects the cd when pressed. The power can still be turned on and off. It's a newer deck, but the face is non-detachable and it has a true (shaft type) analog volume that's also the power on/off control. I tried the microcontroller reset button, and the deck clicks off and back on, but still the same problem. After reading the repair FAQ and searching the forums, I'm thinking it could be the microcontroller or a power supply problem. Does this sound likely, or could it be something else? The deck has a large outboard +/-15v DC-DC converter with power and ground inputs, and then six wires going out to the deck: In: yellow, black Out: yellow, black, blue/yellow, black/white, yellow/red, yellow/black All the connectors and wires test out ok. How should I go about testing the power supply? From what I can tell, black and black/white are both grounds, yellow is constant 12v memory to the deck, and blue/yellow is remote turn-on for the converter. I checked the other two wires for voltage with the deck on and got nothing on the yellow/red, and 0.1v on the yellow/black. Also I can hear the converter "motorboat" or hum quietly when it's on. Is this normal? Any help or suggestions would be greatly appreciated. Thanks, Eric |
#3
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CD Player Display and Button Problem
I would think at this point you will need to order the service manual from
Clarion, if they would sell it to you. Once you get past the power supply, you will require the proper test gear and tools to follow through to troubleshoot your unit. If this is a low cost unit, I would consider retiring it. -- 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 ========================================= "Eric J" wrote in message om... I was wondering if anyone could help diagnose a problem with a Clarion DRX9255 car cd player. The deck turns on and all the front panel buttons light, but the display (vacuum fluorescent) is blank. It takes in a cd and spins it, but there's no signal on the audio outputs. It also doesn't respond when any of the buttons are pressed, except for the eject button.. which beeps and ejects the cd when pressed. The power can still be turned on and off. It's a newer deck, but the face is non-detachable and it has a true (shaft type) analog volume that's also the power on/off control. I tried the microcontroller reset button, and the deck clicks off and back on, but still the same problem. After reading the repair FAQ and searching the forums, I'm thinking it could be the microcontroller or a power supply problem. Does this sound likely, or could it be something else? The deck has a large outboard +/-15v DC-DC converter with power and ground inputs, and then six wires going out to the deck: In: yellow, black Out: yellow, black, blue/yellow, black/white, yellow/red, yellow/black All the connectors and wires test out ok. How should I go about testing the power supply? From what I can tell, black and black/white are both grounds, yellow is constant 12v memory to the deck, and blue/yellow is remote turn-on for the converter. I checked the other two wires for voltage with the deck on and got nothing on the yellow/red, and 0.1v on the yellow/black. Also I can hear the converter "motorboat" or hum quietly when it's on. Is this normal? Any help or suggestions would be greatly appreciated. Thanks, Eric |
#4
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CD Player Display and Button Problem
"Jerry G." wrote in message ...
I would think at this point you will need to order the service manual from Clarion, if they would sell it to you. Once you get past the power supply, you will require the proper test gear and tools to follow through to troubleshoot your unit. If this is a low cost unit, I would consider retiring it. -- 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 ========================================= "Eric J" wrote in message om... I was wondering if anyone could help diagnose a problem with a Clarion DRX9255 car cd player. The deck turns on and all the front panel buttons light, but the display (vacuum fluorescent) is blank. It takes in a cd and spins it, but there's no signal on the audio outputs. It also doesn't respond when any of the buttons are pressed, except for the eject button.. which beeps and ejects the cd when pressed. The power can still be turned on and off. It's a newer deck, but the face is non-detachable and it has a true (shaft type) analog volume that's also the power on/off control. I tried the microcontroller reset button, and the deck clicks off and back on, but still the same problem. After reading the repair FAQ and searching the forums, I'm thinking it could be the microcontroller or a power supply problem. Does this sound likely, or could it be something else? The deck has a large outboard +/-15v DC-DC converter with power and ground inputs, and then six wires going out to the deck: In: yellow, black Out: yellow, black, blue/yellow, black/white, yellow/red, yellow/black All the connectors and wires test out ok. How should I go about testing the power supply? From what I can tell, black and black/white are both grounds, yellow is constant 12v memory to the deck, and blue/yellow is remote turn-on for the converter. I checked the other two wires for voltage with the deck on and got nothing on the yellow/red, and 0.1v on the yellow/black. Also I can hear the converter "motorboat" or hum quietly when it's on. Is this normal? Any help or suggestions would be greatly appreciated. Thanks, Eric I have seen quite a few of the flourescent backlights not work in these units, but test the inverter voltages and the display controller ic signals with an oscilloscope if you have one. |
#5
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CD Player Display and Button Problem
"Jerry G." wrote in message ...
I would think at this point you will need to order the service manual from Clarion, if they would sell it to you. Once you get past the power supply, you will require the proper test gear and tools to follow through to troubleshoot your unit. If this is a low cost unit, I would consider retiring it. -- 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 ========================================= "Eric J" wrote in message om... I was wondering if anyone could help diagnose a problem with a Clarion DRX9255 car cd player. The deck turns on and all the front panel buttons light, but the display (vacuum fluorescent) is blank. It takes in a cd and spins it, but there's no signal on the audio outputs. It also doesn't respond when any of the buttons are pressed, except for the eject button.. which beeps and ejects the cd when pressed. The power can still be turned on and off. It's a newer deck, but the face is non-detachable and it has a true (shaft type) analog volume that's also the power on/off control. I tried the microcontroller reset button, and the deck clicks off and back on, but still the same problem. After reading the repair FAQ and searching the forums, I'm thinking it could be the microcontroller or a power supply problem. Does this sound likely, or could it be something else? The deck has a large outboard +/-15v DC-DC converter with power and ground inputs, and then six wires going out to the deck: In: yellow, black Out: yellow, black, blue/yellow, black/white, yellow/red, yellow/black All the connectors and wires test out ok. How should I go about testing the power supply? From what I can tell, black and black/white are both grounds, yellow is constant 12v memory to the deck, and blue/yellow is remote turn-on for the converter. I checked the other two wires for voltage with the deck on and got nothing on the yellow/red, and 0.1v on the yellow/black. Also I can hear the converter "motorboat" or hum quietly when it's on. Is this normal? Any help or suggestions would be greatly appreciated. Thanks, Eric I have seen quite a few of the flourescent backlights not work in these units, but test the inverter voltages and the display controller ic signals with an oscilloscope if you have one. |
#6
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CD Player Display and Button Problem
Although it's a few years old, it was a fairly expensive unit when new
($1k+). I'll probably send it to Clarion for repair ($150) if it's the processor. But if it's just the power supply, I'd like to try and repair it myself or just buy a new PS. Does it sound like the PS could be faulty, or is it not really possible to tell without schematics? I just noticed the display has four dim red lines running horizontally across it. The VF display is normally a blue dot formation. This unit is basically identical to the McIntosh MX406, if anyone happens to have experience repairing those. Thanks for the help. "Jerry G." wrote in message ... I would think at this point you will need to order the service manual from Clarion, if they would sell it to you. Once you get past the power supply, you will require the proper test gear and tools to follow through to troubleshoot your unit. If this is a low cost unit, I would consider retiring it. -- 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 ========================================= |
#7
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CD Player Display and Button Problem
Although it's a few years old, it was a fairly expensive unit when new
($1k+). I'll probably send it to Clarion for repair ($150) if it's the processor. But if it's just the power supply, I'd like to try and repair it myself or just buy a new PS. Does it sound like the PS could be faulty, or is it not really possible to tell without schematics? I just noticed the display has four dim red lines running horizontally across it. The VF display is normally a blue dot formation. This unit is basically identical to the McIntosh MX406, if anyone happens to have experience repairing those. Thanks for the help. "Jerry G." wrote in message ... I would think at this point you will need to order the service manual from Clarion, if they would sell it to you. Once you get past the power supply, you will require the proper test gear and tools to follow through to troubleshoot your unit. If this is a low cost unit, I would consider retiring it. -- 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 ========================================= |
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