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Toshiba ce27f15 I have a Toshiba CE27F15 27" TV, vintage 1996. The video input works fine, but the cable input is breaking up the signal, audio and video. It's thermally sensitive, as the problem improves when the set warms up for 20 minutes or so. Sometimes it clears completely. I haven't cracked it open yet because I don't have a schematic. Any ideas where to start? Is there a free schematic available somewhere on-line? The set works great other than this, but it's not worth putting much money into since it's so old. But I'd like to give it one good attempt at a repair. Thanks, All...

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  • Mitch C Mar 18, 2008

    Great suggestions. I'll start there. Thanks!



    Would still be interested in getting a schematic. Any free download sites you know of ???

  • Mitch C Mar 19, 2008

    Thanks!

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Since it's thermal...the problem probably lies in the tuner circuitry...but it would be a good idea to rule out the obvious first...such as a cracked solder connection at the connector. Try physically moving the cable around while the symptom is present to see if it changes. Or try some freeze spray on the connector after it starts working. If it's thermal...freeze spray should make it fairly easy to isolate in or near the tuner.

Posted on Mar 17, 2008

  • networkmagic Mar 18, 2008

    Sorry...can't seem to find any free schematics. Sam's publishing has a technical manual for $20. You can search for it using your model number on this web page.

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1 Answer

Tv only accepts signal from the single black cable cannot get the tv to recognize the 2 audio cables and one video cable.. how do i fix this?


Hello
Your Emerson TVs audio format is not stereo; it is mono. Therefore only one audio input will be active. There is a Note give on your TVs manual. I copies it here for your information.


1. VIDEO (IN) jack- Connect to the video

output jack of a video camera or VCR.

2. AUDIO (INPUT) L/R jacks- Connect to

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Note: The AUDIO (INPUT)L jack is for

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1 Answer

Hdmi will not work only use of component cables will.


Hello

The HDMI[1] input on your TV receives digital audio

and uncompressed digital video and audio from an

HDMI device or uncompressed digital video from a

DVI[2] device.

This input is designed to accept HDCP[3] program

material in digital form from EIA/CEA-861/861B-

compliant[4] consumer electronic devices (such as a settop

box or DVD player with HDMI or DVI output).

The HDMI input is designed for best performance

with 1080i high-definition video signals, but will also
accept and display 480i, 480p, and 720p signals.

To connect an HDMI device, you will need:

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For proper operation, it is recommended that you use

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difficulty if you use an HDMI cable shorter than 16.4

ft (5m).

HDMI cable transfers both video and audio.

Separate analog audio cables are not required (see

illustration below). Some CDVs (video CDs) may

not output digital audio signals. In that case, you

may hear sound by connecting analog audio cables.

However, if you connect analog audio cables with

this connection, the HDMI terminal on the TV will

not receive the HDMI digital audio signal and you
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To ensure that the HDMI or DVI device is reset

properly, it is recommended that you follow

these procedures:

• When turning on your electronic components,

turn on the TV first, and then the HDMI or

DVI device.

• When turning off your electronic components,

turn off the HDMI or DVI device first, and
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To connect a DVI device, you will need:

• one HDMI-to-DVI adapter cable

(HDMI type A connector)

For proper operation, the length of an HDMI-to-

DVI adapter cable should not exceed 9.8 ft (3m).

The recommended length is 6.6 ft (2m).
• one pair of standard analog audio cables
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1 Answer

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Maybe the Toshiba parts department can supply a service manual for your set. With a signal source, a scope, and a DVM, an experienced technician can troubleshoot your set to locate where the failure is occuring.

I have not serviced this model, but in other models I have found the main input select IC to be defective. In some cases I also found a bad voltage regulator IC that supplies the input section has failed.

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1 Answer

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2 Answers

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what aiudio cable uusing with couplunt cables red white on same input ?

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1 Answer

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1 Answer

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I have had the input switching IC, and or parts failures in the input amplifiers go defective in these sets.

This can happen from a static electricity discharge while connecting something, or if one of the devices being connected has an electrical leakage and causes some current to come up in to the input of the TV set.

I have also had the input jack assembly go defective and require servicing. This is from one of the jacks breaking and causing an internal short, or if the circuit board became cracked or broken from the TV falling or being roughly handled.

Jerry G.

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2 Answers

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1 Answer

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2 Answers

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