[TechAssist] Re: fix? Toshiba CZ32T31 TAC9912 dead. HOT Q404 shorted...
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 08 Apr 2005 10:33:59 -0400
Maybe this would explain why when I rechecked the HOT heat sink after
30 min or so it was uncomfortably warm to touch with my weaker sub?
I will order the original and retest.
Thanks in advance,
Phil Bader
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
Leonard Caillouet wrote:
>Phil,
>
>Using the HOT specs program that came with the Intrepid database, the 2253
>is rated for 6 amps max to the 2553 8 amps. Max collector cutoff current is
>much lower at 10 uA compared to 1000 uA and the 2253 has a shorter fall time
>and higher minimum gain so it likely operates faster and should run cooler.
>Likely to run OK but less able to deal with excess current. If something
>goes it will be more likely to fail, but the 2553 likely would as well if
>that much current was pulled. Since B+ line is fused with 1.6A fuses, I
>doubt it will cause PS failure if it were to go, so it is likely OK.
>
>Leonard G. Caillouet
>Electronics World
>1261 NW 76 Blvd
>Gainesville, FL 32606
>352-332-5608
>352-332-5668 FAX
>
>----- Original Message -----
>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Thursday, April 07, 2005 3:32 PM
>Subject: [TechAssist] fix? Toshiba CZ32T31 TAC9912 dead. HOT Q404 shorted...
>
>
>I searched my boneyard and found a 35" Toshiba chassis with a 2SD2253
>HOT. Seemed similar application,similar chassis,mfgr,etc. I entered the
>2sd2253 salvage HOT into Tritronics' parts database and tho it did not
>show a direct cross to the original 2SD2553, it DID show a common
>toshiba number# 23314955 that is common to both HOTs.
>And is available at $5.89.
>I tried it. Fix was to replace the GMA 1.6A B+ fuse, the HOT and set is
>functioning well, HOT cool.
>Seems these Toshiba 2sd2253s do sub for the orig 2SD2553.
>Phil Bader
>
>Philip Bader
>Jan Phyl TV Inc. (estab. 1976)
>3420 Recker Hwy. Winter Haven, Fl. 33880
>Fax (863) 299-8821
>email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
>Phil Bader wrote:
>
>
>
>>Q404 HOT (D2553) shorted. Any histories on why before I locate a
>>replacement?
>>Thanks.
>>Phil Bader
>>
>>
>>
>>
>>
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