Question about Sony CDX-GT100 CD Player

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All the buttons are not working except for the volume on the CD player when the unit is powered up by inserting a disc from the power off mode. The radio and all controls do not work. This happened all of a suddon when turning the volume down. The unit has power, and I tried pushing the reset button behind faceplate. Any advice?

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Posted on Jan 02, 2017

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SOURCE: Please Help

check face plate maybe contact dirty if not well our in trouble sometime it not worth to repair it cheers

Posted on Jan 14, 2008

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SOURCE: sony cdx r3300 Won't play...simply scrolls a message

_half fixed, use the remote -@least can get more life outa the unit!

Posted on Mar 13, 2009

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SOURCE: none of the buttons on the faceplate seem to work

check the gold contacts on the back of the face and the unit also check the release mechanism theres a little black button (not the reset) that when face is pressed up against it it activates power to the gold contacts thus powering the buttons

Posted on Dec 15, 2009

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I have a new Philco Turntable CD with Cassette Player, Article No. 841-205, that was given to me by famly who says neither the record player, CD or Cassette players worked. When I turn it on you can hear...

First let us review. You have a modular player (and recorder?) unit that includes the following playback elements: a compact disc (music) player; a tape cassette player (with?/without[?] second/overdub recorder or record head[?] on a single tape drive unit); and a phonograph record player/changer(?) including turntable, tone arm with stylus on ceramic[?] or magnetic[?] pickup cartridge. We can assume the unit has integrated or connected speakers since you say that applying touch pressure on the stylus produces a current (as pickup styluses are wont to do under pressure) detectible as audible sound in the same manner as pressure from tone arm weight on a musical record groove impression. Now, such units in their original form from analog days would also probably have had "EXT(ternal)" and/or EAR[phone] output jack or jacks for connection to an external audio output "player" typically driving large speakers networks in cabinets comprising large woofer, smaller midrange and even smaller tweeter speakers.

We know also that the multi-playback-mode appliance includes a Because a stylus (or even ancient needles) were/are never provided electric power input (like tube or transistor) but actually created their own, very weak current (aka piezo-electricity) which, in order to be amplified to drive speakers, had to first be preamplified to a signal level sufficient to drive an amplifer. So the finger rub you hear is evidence of pre-amplified signal power reaching an amplifer. Therefore, it should be safe to say that the amplification system is functional--as is, I assume also, would be the volume control you operated during neede stimulation.

So, now let us take survey of what actually seems to be NOT working (and, please, do use the COMMENT blank to correct any error or oversight--
  • Turntable:
    • Power-On indicator or indication
    • Platter drive motor and linkages, including
    • Tone arm transport
    • Record changer spindle (if present)
  • Magnetic-Tape Casette Player[s?]
    • Power-On indicator or indication
    • Tape-transport-capstan drive motor (&or belt linkage)
    • Cartridge eject button and mechanism
      • Note that a "slack" button due to spring dislodging is a typical failure mode but...that would not cause the other/overall problem/ may be disregarded
    • Secondary (Overdub) player, if present (same presumptive failure mode)
    • "Record-start" button and function (if record pickup head present on either tape drive)--but...not a fault-tree item if drive motor is not functioning, which it is not!
  • Compact disc playback [/record-burn?] unit
    • Power-On indicator or indication
    • Insert/eject button functionality
    • CD drive spin/seek motor fuctionality
So now (before imputing fault of a non product kind) we can ask what all of these apparent failures have in common (in the "nothing works" failure mode) as set forth above?

Yes, it would be their common reliance upon AC power...whereas the only devise that seems operable, the amplifers to drive the speaker(s), with virtual certainty, functions on rectified AC power--that is to say, DC power...all with one inescapable inference:
  • Household power is split beyond power cord input, respectively, to provide "juice" for the amplification and for the everything else subsystems.
    • Either in the form of a tap for each subsystem
    • Or in the form of a secondary power supply
    • Either or both of which could have been disabled by a current limiting devise such as a fuse
    • But only one (power subsystem) of which the power branch or supply is in failure mode: the "everything else" subsystem.
    • But...
Imputing cause of failure is problematic:
  • Given the absence of any warrantly claim for a failed, "new" player
  • Given what could accordingly be a construed "washing of hands," evidenced by the seeming gratuitous gifting of a music player with critical-to-fatal flaws, the cause of which the donors might well have "felt" they had played a part.
It would not be unrealistic to surmise that failure might have resulted from such mundane misbehaviors as
  • Plugging into a wrong-voltage outlet
  • Use of an extension cord
  • Failure to temp stabilize after really-cold storage or transport
  • Liquid spillage
  • Or even a thing so common in a "world supply chain" as a supposed MTBF-1x100xhr subassembly's failing in 1x100xsec's.

In a nut shell, if "wall voltage" reads at input, and none shows at fuse, power supply, wiring ouput to each playback subsystem, then nothing but a common return flaw is likely to affect every subsystem except amplification.

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The manual for this unit is available at: .

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