No Video - Tatung OMNISCAN SERIES Service Manual

6.11 NO VIDEO
CHECK SIGNAL - - - - - - - - - - - - - - - - - - - > RED, GREEN, BLUE
& CONNECTOR SIGNAL LEVEL
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O.7Vp-p
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CHECK 73V - - - - - - - - - - - - - - - - - - - - - - - - - > PIN 2 OF P009 (PWB-1697)
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12V PIN 3 OF POlO
6V PIN 2 OF POlO
CHECK INPUT -------------------------------> PIN 1 OF 0002, 0062, 0122
SIGNAL 0001, 0061, 0121
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CHECK GAIN ------------:----'-----------------> PIN 4 OF 0002, 0062, 0122
CONTROL (OV TO 10V)
CIRCUIT R721 , R723, P721 (PWB-1701-2)
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0047, 0048, 0008, 0068, 0128 (PWB-1697)
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CHECK CLAMP
----------------~--------------->
PULSE
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PIN 12 OF 0002, 0062, 0122
POSITIVE PULSE 5Vp-p
0051 a, 0051 b, 0049
0049a-0049d
CHECK FEEDBACK ----------------------------> R016, R076, R136 (39 Kohm 2%)
CIRCUIT R012, R072, R132 (5.1 Kohm 2%)
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CHECK DC BIAS --------------------------> BASE OF 0003,0063,0123
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8.2V
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CHECK-----------------------------------> 0002, 0062, 0122
PREAMPLIFIER 0005, 0065, 0125
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CHECK OUTPUT ---------------------------> 0003,0006, 0063, 0066
TRANSISTOR 0123, 0126
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END
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