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No volume on Sony PHC-Z10

Volume does not work,(no sound) the knob just turns. I tryed another spare speaker but did not work on either the radio/tape or cd.

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Grubhead
  • 4590 Answers

SOURCE: I have sony LBT-XG900Av. The

I think the problem will be somekind of audio IC that controls volume and other aspects of the sound has failed. Not a job for an amateur to fix as it will almost certainly involve the desoldering and refitting of multi-pin microchip. I would take it to your nearest Sony Service center.

Posted on Dec 14, 2011

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Vol problem


Here is the entire troubleshooting section from the manual.

Your problem is presumed to be a shorted speaker wire. I assume you're not getting the failure ONLY at extremely high volume levels.

Care and maintenance
Occasional care and maintenance of the unit and the software
are needed to optimize the performance of your unit.
To clean the cabinet
Use a soft and dry cloth. If the unit surfaces are extremely
dirty, use a soft cloth lightly moistened with mild detergent
solution. Do not use strong solvents such as alcohol, benzine
or thinner.
To clean the tape heads
Dirty tape heads cause sound deterioration. After every 10
hours of use, clean the tape heads with a head cleaning
cassette. Refer to the instructions of the cleaning cassette.
To demagnetize the tape heads
Use a demagnetizing cassette after every 20 to 30 hours of
use. Refer to the instructions of the demagnetizing cassette.
Care of CDs
When a CD becomes dirty, wipe it from the center out with a
cleaning cloth. After playing a CD, store it in its case. Do
not keep it in hot or humid places.
Care of tapes
Store tapes in their cases after use. Do not leave tapes near
magnets, motors, television sets, or any source of
magnetism. Do not expose tapes to direct sunlight, or leave
them in a car parked in direct sunlight.

REFERENCE
Troubleshooting
If your unit fails to perform properly, check the following guide
and the relevant sections of the Operating Instructions.
There is no sound.
•Are the speakers and AC power cord connected properly?
The unit shut off suddenly.
•Possibly a short circuit in the speaker terminals.
Disconnect the AC power cord from the AC power outlet
and re-connect the speaker cords correctly.
The unit blacks out when the unit is turned off.
•Is ECO mode set to on?
Erroneous display.
•Reset the unit.
Poor radio reception.
•Check antenna connection. Adjust the antenna to find the
best reception.
•Move unit and antenna away from other electric appliances
and cords.
The tape does not run.
•Is the deck in pause?
Poor tape sound.
•Check for dirty heads. Clean them if needed.
•Use type I (normal) tapes.
Cannot record.
•Is the erasure prevention tab of the tape broken off? If so,
cover the detection slot with adhesive tape.
The CD player works poorly.
•Is the disc correctly loaded?
•Is the disc dirty?
•Is the lens affected by condensation? If so, wait
approximately one hour and try again.
Resetting the unit
If an unusual condition occurs in the display window or the
cassette deck, reset the unit as follows:
1 Press POWER to turn off the power.
If the power cannot be turned off, disconnect the AC power
cord, then plug it in again.
2 Hold down s and press POWER.
Everything stored in memory after purchase is cleared.

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1 Answer

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Hi,
This sounds like a case of a dirty/defective rotary encoder. The volume control used here is not the conventional potentiometer type , but a rotary set of switches that tell the sytem if the knob is being turned left ot right.
Do you think you'd be able to open the unit and spray some contact cleaner into the rotary encoder? It might involve dis-assembling it down to front bezel removal.
jango.

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1 Answer

No sound


Have you checked if this is only when you play CDs or also if you play Tapes or Radio? If sound is not present even if you use radio and tape, then the sound output IC is blown, and needs replacement. You need to see a professional technician for this. Also, see if your speakers are connected properly. Then try to connect another set of speakers (borow from a friend) and see if sound is audible. If yes, thn your speakers are faulty.

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