[TechAssist] Re: Mitsubishi CS-20SX1 Shutdown.
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 10 Jun 2003 21:43:29 -0400
Rodney,
From Tech Repair CD:
MITSUBISHI\CS20SX1\SHUTDOWNS AT TURN ON IMMEDIATELY* RELAY WILL NOT CLICK AGAIN
UNTIL MICRO RESET\\\\22/50V CAP MOUNTED UNDER
CIRCUIT BOARD NEAR IC401\\\\\\\\
MGA\CS20SX1\INTERMITTENT SHUTDOWN\\\\THIS IS DUE TO POOR GROUNDING OF D581*
R583 AND R584 IN THE\PROTECTION AREA. THE PAD IS
GROUNDED BY THE HEAT SINK\MOUNTING SCREW. CLEAN AND MAKE SURE THE PAD IS CLEAN*
ALSO\CHECK THE SOLDER CONNECTIONS AT THE REMAINING
HEAT SINK\MOUNTING POINTS.\\\\
Good luck.
Jeff Dougherty
Intrepid Video TV/VCR
263 S Front St
Steelton PA 17113
fax...717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "RT Technologies" <rthomas903@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, June 10, 2003 7:19 PM
Subject: [TechAssist] Mitsubishi CS-20SX1 Shutdown.
Set came in and would shutdown after 2 sec. I replaced
caps off flyback (c513, c514, c515, c516). I also
replaced c518 (33uf 50v). Tv worked ok all day. Next
day, it's shutting down again. I went trough all caps
in power supply and flyback secondaries for ESR all
check ok. All Power supply and flyback secondary
voltages normal. Even high voltage is ok (27kv)
schematic says should be 27k-29kv. There is a pin
marked fbp on the video IC. I'm assuming that's the
X-ray protection, but all resistors and diodes
associated with this circuit check good. Does any one
have a clue as to why this set is still shutting down?
Rodney Thomas
RT Technologies
Clarksville, MD
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