Celestial HP5188i ctv unidentified parts.

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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.

Re: Celestial HP5188i ctv unidentified parts.
On Mon, 9 Mar 2009 23:33:43 -0700 (PDT), Griff

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STR-F6600 datasheet:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-4/DSA-60158.pdf

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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.

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MOSFET current sense resistor?

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FWIW, this is the service manual for a Samsung set that appears to use
the same regulator IC:
http://www.eserviceinfo.com/downloadsm/21279/samsung_sp47w3hf1x.html

This forum may have some useful information and a service manual:
http://www.forums.hcsd.com.au/Blah.pl?m-1203453840 /

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

Local support:
http://www.changhong.com.au /

Celestial Rear Projection Television OPERATION MANUAL for DP4388 and
DP5188:
http://www.eserviceinfo.com/download.php?fileid28%186

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Re: Celestial HP5188i ctv unidentified parts.
On Mon, 9 Mar 2009 23:33:43 -0700 (PDT), Griff

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Does this help?

http://www.worldwideelec.com/assets/pdf/parts/GT2415~3215PN.pdf

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):
http://www.worldwideelec.com/assets/pdf/parts/GT2415~3215PN.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Re: Celestial HP5188i ctv unidentified parts.
On Wed, 11 Mar 2009 06:39:51 +1100, Franc Zabkar
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Sorry, that should have been ...
http://www.worldwideelec.com/assets/pdf/APEX%20SERVICE%20MANUAL%20GT2415%20-%20GT3215/GT2415-3215_Schematics1.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Re: Celestial HP5188i ctv unidentified parts.
Thanks for all the research and info. Frank.
I have not had time yet to do any more with the set.

Russell.


Re: Celestial HP5188i ctv unidentified parts.
On Sun, 15 Mar 2009 04:56:51 -0700 (PDT), Griff

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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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Re: Celestial HP5188i ctv unidentified parts.
On Mon, 16 Mar 2009 03:04:26 +1100, Franc Zabkar

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That should have been ...

 CHDIOnnnnn = ChangHong DIOde nnnnn

- Franc Zabkar
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