[TechAssist] Re: Panasonic CT32SX31E overscan, blows fuse
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 07 Oct 2005 18:03:59 -0400
Here's a list of shut down/dead issues with your model, from techrepairCD.
HTH
Phil
PANASONIC ~CT32SX31E~Shorted H.O.T* After 1 Min Pix Bowed On
Sides~~~~Shorted Q551 (2sc5517000lk) After Replacement Set Turned On
With Full Raster. After 1 Min Sides Bowed Inward. Found Shorted C557
(Ecqm1h6825v)~Ic750 (Njm4565l Sub Ba15218n) Open R517 (Erg1sj103p/ 10k
2watt) All Parts Are Off Abl Line Replaced Fly As Precaution
(Kft5aa369f)~ Also Check C724* C755* D509* Q701* Q702* L551* L553~~~~
PANASONIC ~CT32SX31E~Pincushion Problem~~~~Is This Case C757*
6800pf/50v* P/N Ecqb1h682jm3 Was Shorted* About 1.2 Ohms And R517 Was
Open* 10k 1 Watt* Looks Like A 1/2 Watt But Is A 1 Watt.~P/N Erg1sj103p.
R517 Is In The Abl Circuit Off Flyback Pin 3 And C757 Is Also In The Abl
Circuit Off Flyback Pin 3 But Is In The Pincushion Circuit Near
Ic750~Check C524 (.22) R517 (10k) Q702 (A1309) And R246 (1k Chip Cap)~~~~
Panasonic~CT32SX31~Picture would breathe on bright pictures. Regulation
B+ was o.k.~~~NA8~Check D510~~~~~~
Panasonic~CT32SX31~Troubleshooting Tips~Check the ABL circuit to confirm
if it is the cause of the problem. 1. Apply a full white field or large
window pattern with high white.~2. Lift Diode D837 to disable140V line
short protect feedback circuit to MPU SOS pin. 3. Short pin 3 of flyback
T551 to ground.~Observe any change in white level. If there is no change
in brightness the ABL circuit is faulty.~Check components: C524* R517*
D509* D510* R514* R515* R516* and C525 on the HX series models) If the
white level increases* then ABL is OK~Troubleshoot other protection
circuits. For HX series: check D837* D835* D841* D401* D409* D894*
IC2505 For SX series: check D837* D835* D841* IC101* R246. ??~Other
causes for intermittent shutdown are arcing and/or oxidation of the CRT
connection pins. Remove the CRT drive board and clean the CRT pins with
a wire brush or steel wool.~In addition* check the spark gap on the CRT
socket. Remove the 2 focus wires (orange and white cable) by pulling the
tab* then pull the 2 side clips from the~socket cover and inspect the
spark gaps. If they appear abnormal* replace the CRT socket. (Part
number: TJSC01800). Note: a protection circuit being triggered~usually
causes intermittent shutdown problems. The suggestions above are two of
the most frequent causes for shutdown* but certainly not the only causes~
Panasonic~CT32SX31~Shuts down~Faulty components in the ABL circuit cause
increased beam current to trigger shutdown circuit~Arcing at CRT
connector and/or spark gap causes shutdown.~~1. Troubleshoot ABL circuit
and check components listed below. Check C524 and R517. 2. Clean CRT
pins and/or replace CRT socket connector (part number TJSC01800)~~~~~~
Panasonic~CT32SX31~intermittently shutdown and must be unplugged before
it will turn on again~~~~Arcing at the CRT pins and/or spark gap causes
the unit to shutdown. This is more likely to occur at high altitude
areas (several thousand feet above sea level).~Replace CRT socket
connector with improved part number~~~~~
Panasonic~CT32SX31~Pincushion problem~~~NA8~Check C757~~~~~~
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
personal/ alt. email: pbader@xxxxxxxxxxxxxxx
see our ad at:
http://jan-phyl-television-pc-monitor-service.9601288257006.worldpages-ads.com/
Barry wrote:
>This BP371 chassis will shut down intermittently sometimes blowing fuse. The
>screen is overscanned on the sides and has slight pincushion (hour glass) Has
>anyone had this failure?
>Thanks,
>Barry MacInnes
>Television Service Clinic
>2 Church St. W.
>W. Lebanon,NH 03784
>foxhole@xxxxxxxxx
>
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