[TechAssist] FIXED! THANKS! ...Need SCHEMATIC for ANY TOSH. Which Uses TA1310 J...
- From: Bil Green <tv.vcrrepair@xxxxxxxxxxx>
- To: "MDileo0000@xxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Fri, 23 Jan 2004 23:26:26 -0800
Thanks to all those that sent me schematics and tips on this Toshiba
CZ27V51 with excessive brightness. This was really a tough one. It
turned out to be Q908 (part of a 7 transistor circuit on the CRT
board), even though the voltage on the B and E of the output
transistors was OK. Really seemed like an ABL problem.
Q908 was leaky and I couldn't see that it was critical to even have
this transistor circuit functioning. I disconnected the collector and
the brightness finally went normal (was way too bright). Replaced
Q908.
Thanks again for sending the prints and tips. Funny thing - the print
with a model no. that was almost the same (CZ32V51) didn't have this
special circuit on the CRT board. The 27A60 did!
--
Best regards,
Bil Green
2001 TV VCR
Mammoth Lakes, CA 93546
760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
Friday, January 23, 2004, 8:39:20 AM, you wrote:
Mac> Bil,
Mac> Toshiba models 32A32 and 27A50 use TA1310 and are listed in the
index-video
Mac> txt. page of the secure members area. You will need to request
administration
Mac> to place it on the download page.
Mac> Dominic DiLeo
Mac> Atlantic TV
Mac> Freeport, Maine
Mac> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mac> In a message dated 1/23/04 12:39:31 AM Eastern Standard Time,
Mac> tv.vcrrepair@xxxxxxxxxxx writes:
Mac> << Toshiba 27" TV
Mac> Model CZ27V51 or ANY SIMILAR model
Mac> Chassis TAC 9911
Mac> 2000 Model
Mac> I DIDN'T GET ANY RESPONSE FROM SEVERAL LISTS I POSTED TO LAST NIGHT
Mac> I REALIZE IT'S A HASSLE TO SCAN TV SCHEMATICS. Maybe someone has a
Mac> 1999 or 2001 print or even a 19" with the same jungle chip - Just
Mac> need a small portion or even a couple voltages to check instead.
Mac> NEED SCHEMATIC OR HELP
Mac> Bright screen with retrace lines
Mac> Screen voltage is normal (and turning screen down causes red smear)
Mac> CRT cathodes are around 70V (200V supply is normal). Color output
Mac> transistors base and emitter voltage is normal.
Mac> ADJUSTING THE BRIGHTNESS LIMITER IN THE SERVICE MENU CAUSES NO
Mac> CHANGE. Other adjustments do work
Mac> A few weeks ago the CRT went bad (no vacuum) and R216 was smoking.
Mac> I replaced the CRT and R216 (with a 22k) and the set worked OK.
Mac> I need a partial print (brightness limiter circuit - flyback to
Mac> jungle chip) or someone to tell me the correct value of R216 and
Mac> other parts in that circuit which may be causing a brightness
Mac> limiter problem.
Mac> --
Mac> Best regards,
Mac> Bil Green
Mac> 2001 TV VCR
Mac> Mammoth Lakes, CA 93546
Mac> 760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
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