Celestial HP5188i ctv unidentified parts.

Celestial Rear projection ctv model HP5188i

NQ821 voltage reg has exploded (STRF6656) VQ821 transistor is open circuit ( C2655)

VD821 shorted (unknown) VD829 shorted (unknown) VD827 shorted (unknown)

R822 measured 5 ohms (unsure if this value is correct)

Can anyone please give me info. on the above parts? Or maybe even supply a copy of the power supply schematic.

I have been unable to obtain a scematic elsewhere.

Thanking you, Russell.

Reply to
Griff
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On Mon, 9 Mar 2009 23:33:43 -0700 (PDT), Griff put finger to keyboard and composed:

STR-F6600 datasheet:

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2SC2655

From page 14 of the STR-F6600 datasheet:

"Diodes carrying the high-frequency flyback currents (such as the transformer rectifier diodes) should have a fast or ultrafast reverse-recovery characteristic, adequate current handing and peak reverse-voltage rating."

In view of the extensive damage, you may want to check the optocoupler and any overvoltage protection diode on the secondary side of the switchmode transformer.

MOSFET current sense resistor?

FWIW, this is the service manual for a Samsung set that appears to use the same regulator IC:

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This forum may have some useful information and a service manual:

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"This PDT6-9D Chassis is for CHANGHONG 'CELESTIAL' RPTV Model DP4338 [should that be DP4388 ???], HP5188i, HP4388i and DP5188."

Local support:

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Celestial Rear Projection Television OPERATION MANUAL for DP4388 and DP5188:

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- Franc Zabkar

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Franc Zabkar

On Mon, 9 Mar 2009 23:33:43 -0700 (PDT), Griff put finger to keyboard and composed:

Does this help?

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VD821 CHDIO00012 AK03 Diode VD827 CHDIO00063 W05Z18C Diode VD829 CHDIO00037 MTZJ24C Diode VD829 CHDIO00064 W05Z24C Diode VQ821 CHTRS00008 2SC2655-Y Triode R822 CHRES00023 MOS2W0R15J Metal oxide film resistor R822 CHRES00303 RY21-2W-0.15ohmJ Metal oxide film resistor R822A CHRES00023 MOS2W0R15J Metal oxide film resistor R822A CHRES00303 RY21-2W-0.15ohmJ Metal oxide film resistor NQ821 CHICS00057 STR-F6626 IC

Service manual for Apex 24"/32" TV (see page 3):

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- Franc Zabkar

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Franc Zabkar

On Wed, 11 Mar 2009 06:39:51 +1100, Franc Zabkar put finger to keyboard and composed:

Sorry, that should have been ...

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- Franc Zabkar

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Reply to
Franc Zabkar

Thanks for all the research and info. Frank. I have not had time yet to do any more with the set.

Russell.

Reply to
Griff

On Sun, 15 Mar 2009 04:56:51 -0700 (PDT), Griff put finger to keyboard and composed:

It just occurred to me that the part numbers for the Apex TV might be ChangHong numbers, eg CHDIOnnnnn =

- Franc Zabkar

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Franc Zabkar

On Mon, 16 Mar 2009 03:04:26 +1100, Franc Zabkar put finger to keyboard and composed:

That should have been ...

CHDIOnnnnn = ChangHong DIOde nnnnn

- Franc Zabkar

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Franc Zabkar

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