[TechAssist] Re: Panasonic cp36sx31e shutts down after 30 min.
- From: Mehdi Tafaghodi <mehdi@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 06 Apr 2005 16:14:06 -0400
tvservice wrote:
>check crt pins and socket for tarnish, also abl circuit see below
>
>Symptom: The unit will intermittently shutdown and must be unplugged before
>it will turn on again.
>Causes: . Faulty components in the ABL circuit cause increased beam current
>to trigger shutdown circuit.
>. Arcing at CRT connector and/or spark gap causes shutdown.
>Remedy: . Troubleshoot ABL circuit and check components listed below. Check
>C524 and R517.
>. Clean CRT pins and/or replace CRT socket connector (part number TJSC01800)
>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 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).
>
>hth
>Robert
>tvservice@xxxxxxxxxxxxx
>H & H Electronics Inc
>
>----- Original Message -----
>From: "Mehdi Tafaghodi" <mehdi@xxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Wednesday, April 06, 2005 12:03 PM
>Subject: [TechAssist] Panasonic cp36sx31e shutts down after 30 min.
>
>
>
>
>>Hello Techs
>>I need help on this panasonic tv model cp36sx31e . It works normal and
>>after about 30 minutes static appears on screen then shutts down. I
>>resoldered some bad connections on the board but it did not help.Any
>>suggestions ?
>>
>>Mehdi
>>Nova Service Center
>>7531 Lindburgh Dr.
>>Gaithersburg, MD 20879
>>240-632-1717
>>mehdi@xxxxxxxxxx
>>
>>
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Thanks Robert for the information.
Mehdi
Nova Service Center
7531 Lindburgh Dr.
Gaithersburg, MD 20879
240-632-1717
mehdi@xxxxxxxxxx
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