20 Most Recent Sony MHC-GX450 CD Shelf System - Page 3 Questions & Answers

What you need to do is clean and reseat the (widest) white ribbon connector that connects the front panel to the large circuit board on the side. To get to the connector, you'll have to take off the sides and the top, and then unscrew the cd tray so you can lift it up and get your arm and hand in far enough to reach the connector from the opposite side. Then unplug the ribbon cable, blow the connector out with some compressed air, and plug it back in firmly .Also check if the internal fuse is blown.

To exit demo modePress display twice.

This usually indicates faulty wiring, or miswiring. Disconnect the wires, one set and turn the unit off and on to see if that elimates your problem. If it does, the wiring or component is at fault. If you disconnect everything and have the same problem, it's an internal fault with the unit and will have to be troubleshot. Get and estimate first, to evaluate whether or not it's economical to keep, or replace with a new one. Good luck, hope this helps.

Sounds like a dirty lens or laser failure.

Seek professional help.
The lasers are not as expensive as they used to be, get an estimate.

John w

There are bad solder connections on the printed circuit board where the audio output ic;s are located, or some of the interconnecting plugs may need to be reseated.

take out any extra speakers unplug and replug,and if problem continues your fuse is broken.

You may download a copy of the manual from here.

Check the speaker wires on the back for shorts, if okay! the problem is in the audio output ic's in the stereo.

The problem is in the audio output ic, or bad solder contacts, check to make sure there are no bare speaker wires showing, and if by chance you added additional speakers, then that is the problem and should be removed.

The most likely cause is a shorted audio output ic, also check speaker wire for shorts.

The service manual for the MHC-GX450 unit with circuit diagrams can be found at www.electronica-pt.com/images/fbfiles/files/HCD_GX45.pdfThis will help you get more details about the part number of the IC you require.

That subwoofer is included in the MHC-GX450 system. I have the amp/CD/radio unit. but not the subwoofer. The control cable connects the LED on the Sub to the main unit. When the main unit detects this connection to the LED it switches on its internal subwoofer amp to drive the subwoofer.Does the JVC receiver use a "control" circuit through its external subwoofer unit to signal that it is connected to the subwoofer? If not, you do not need to use the control jack on the SS-WG450 to connect to the JVC receiver. Connecting the Sony subwoofer to a subwoofer output on the JVC unit may be enough. Do check the impedance required by your JVC receiver. Sony lists the SS-WG450 as having a Nominal impedance of 6 Ohms. Is this high enough for the JVC unit?