Question about Mitsubishi WS-55807 TV
The screen on my brother's TV started to darken for unexplained reasons. I removed the board on the back of the tube, but that was a temporary solution. It got to the point where it stayed dark. I dobut that the tube's worn, because one time, it went up for a second and died right back down. Also, when it gets dark, I can see about 40 faint white lines running across the screen. I have a hunch that it might be the horizontal driver, but it's just a hunch. I looked for leaky capacitors and loose soldering points, but I didn't find any. Can anybody help me?
GOOD DAY; 1. CHECK C218 4.7 UFD 50 V, AND C220 47 UFD 35V ON THE SIGNAL PCB. 2. CAN BE OBSERVED AS DISTORTION ON DC PEDESTAL PORTION OF STAIR STEP PATTERN. SUSPECT C222 OPEN. LOCATED ON PCB-SIGNAL AT IC200 PIN 35. (10UF 35V) 3. SHOWS UP ON COLOR SIGNALS ONLY. OK ON B/W PICTURES. CHECK X600 AT IC200 PIN 13. SHOULD BE 3.58MHZ. LOCATED ON PCB-SIGNAL. PT# 285P02905 4. (COLOR LINES) CHECK C601 47 UFD @ 35V ON THE COLOR CONTROL OFF PIN 36 OF IC200 ON THE SIGNAL PCB. 5. SUSPECT C222 OPEN. LOCATED ON PCB-SIGNAL AT IC200 PIN 35. (10UF 35V) . REMOVING CRT SOCKET, YOU MAY HAVE CORROSION ON THE PINS OR POOR CONNECTION ON CRT BOARD, AND BY REMOVING IT COULD HAVE CLEANED THE PINS A LITTLE. TRY CLEANING PINS ON CRT AND SOCKET. GOOD LUCK, big IRISH.
Posted on Sep 25, 2008
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