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Responder a: Dead Channel on Fender TwinIf I recall correctly, both inputs feed op amp circuits (4558 ICs I think). I would check those first. I have seen these fail relatively commonly. This will involve removing the unit from the cabinet. Follow the circuit from the input jack to locate the IC. It should be an 8-pin IC with the number 4558 on it. Update this with any progress you make. Dan
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Responder a: Need to replace the transformer in my home theater amp.The problem is not likely to be the transformer. A failure of that part would result in a completely non-functioning receiver. I would rather suspect a coupling cap that is bad as well as other components. Please post additional pictures of the insides. There could be a power supply problem, but I would suspect either the coupling cap or a problem in the final amp stage. If the problem was in the pre-amp stage, it would change with the volume control. Dan
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Responder a: The laser module won't move on the tracks while discs spin - help?Reading a CD but with skipping suggest either a dirty lens or a failing laser. I would first clean the lens using a cotton swab and some alcohol. Be gentle as the lens is supported by small fine wires only. Next, clean the rails that the laser assembly rides on. What happens is this: The laser will fire and try to detect the CD/DVD. Assuming that it can see the disk (in your case it can), then the disk will spin and the optics will attempt to read the index track. It looks like the index is being read for the CD but not in the case of the DVD/Game. DVDs and games require higher laser power to be read. A sign of laser failure is to read CDs but not DVD/Games. Sometimes cleaning resolves the problem. The skipping can be the laser as well. But most often, is dirt on the rails. The lens will move enough to read a few tracks before the motor kicks in for the gross movement of the entire assembly. Try cleaning and report back with the results. Dan
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Responder a: CD Player malfunction when first turned onSince this unit “works” as expected after a warm-up period,I would first look for any poor solder connections around the motor control IC. If I recall correctly, there should be two ICs marked BA6209 or BA6219 (most common for units of this vintage) that are the motor drivers. When playing a CD, there are two movements that take place to provide continual reading of the disc. First is the lens itself that changes angle to read the track (fine movement) followed by the motor rotating the shaft to physically move the optics assembly (gross movement). Both of these happen somewhat simultaneously to give a smooth movement overall to read the disc in a spiral fashion. From what you are describing, the CD system gets lost and the gross movement from one end to the other over the disc is to locate its last position from which it will continue. This can happen for a few reasons. I suspect that the gross movement is not controlled correctly which is causing the optics to overshoot the track. When this happens, the sys...
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Responder a: How to fix error c 32.11This error code indicates that the tape itself is not moving and the unit has shutdown to prevent any damage to the tape. There are a number of possible causes for this since it is a generic error message. There can be a loading problem, or the takeup reel is not moving or there is no movement of the tape at all. In any case, this problem will require further investigation by a service provider. Without seeing the actual camera and investigating internally, there is little that can be done in this forum.
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Responder a: Ps3 won't spin or read disc.If you can see the disc shake a little, I would suspect that the spindle motor has a bad spot or has failed. Try spinning the disk by hand when you see it shake. If that “fixes” the problem, then change the motor (if you can find one). Otherwise, replace the optics assembly that includes the motor. Dan
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Responder a: Optical drive no powerMost laser assemblies ship with a shorting solder connection on the ribbon cable to prevent static damage. Look carefully at the cable on the optics assembly itself for a small “bubble” of solder. Remove this and the laser should work. Since the assembly won’t attempt to spin the disk unless one is detected (laser lights and detects the reflection if a disk is there), it may appear that the assembly has no power. Check for the short and update this with what you find. If you can, post a few pix of the assembly from different angles too. Dan
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Responder a: My cd player not working properlyThe brush may remove any dust on the lens, but there is often a film as well. Use a cotton swab with some alcohol and gently clean the lens. Do not apply too much pressure as the lens is held in place with very fine wires. If the brush helps to allow a CD to play, the cleaning should be a bit more effective. Report back with the results of the cleaning. Dan
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Responder a: Compatible audio jack replacement part?Most of these jacks short out the internal jack pieces to allow for the speakers to work. In other words, inserting a headphone plug will interrupt the normal flow to the speaker and send it to the headphones. That being said, along with your description of what is happening here, I would suspect a bad connection on the board for the jack itself. If the solder connection is bad and loses connection to the board, it will appear to the system that a plug was inserted. That poor connection would also explain the requirement for an exact position for the plug as well. When in that particular position, the connection to the board is made. I would open up the unit and look at the connections on the board at the jack. If you can, take a picture and post it here as well. Hopefully a simple resolder of the joint is all that will be required. Dan
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Responder a: Audio amplifier has short circuitMake, model and a few pictures of the boards inside would help. You give us little to go on here. In general, with a direct short like this, look at the bridge rectifier being shorted (if there is one) or if this has a switching power supply, check the main transistor (should be on a heatsink). Update this with the above info and we should be able to provide more detailed suggestions.
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For non-phone repairs similar methodologies apply. The difference is the cost of the parts. In my business, I have been repairing audio and video devices for over 30 years. I stock all of the common transistors, capacitors and resistors which probably cost me over $500 initially, but saves customers’ time and me space since I can usually provide a quick turn-around time on repairs. Storing component parts takes a lot less room than receivers or cameras. For the model specific parts, I generally order 2. This takes care of the existing repair and allows for another repair with no wait time.
Dan
For non-phone repairs similar methodologies apply. The difference is the cost of the parts. In my business, I have been repairing audio and video devices for over 30 years. I stock all of the common transistors, capacitors and resistors which probably cost me over $500 initially, but saves customers’ time and me space since I can usually provide a quick turn-around time on repairs. Storing component parts takes a lot less room than receivers or cameras. For the model specific parts, I generally order 2. This takes care of the existing repair and allows for another repair with no wait time.
Dan
For non-phone repairs similar methodologies apply. The difference is the cost of the parts. In my business, I have been repairing audio and video devices for over 30 years. I stock all of the common transistors, capacitors and resistors which probably cost me over $500 initially, but saves customers’ time and me space since I can usually provide a quick turn-around time on repairs. Storing component parts takes a lot less room than receivers or cameras. For the model specific parts, I generally order 2. This takes care of the existing repair and allows for another repair with no wait time.
Dan
For non-phone repairs similar methodologies apply. The difference is the cost of the parts. In my business, I have been repairing audio and video devices for over 30 years. I stock all of the common transistors, capacitors and resistors which probably cost me over $500 initially, but saves customers’ time and me space since I can usually provide a quick turn-around time on repairs. Storing component parts takes a lot less room than receivers or cameras. For the model specific parts, I generally order 2. This takes care of the existing repair and allows for another repair with no wait time.
Dan