Abnormal Vertical Height - Tatung OMNISCAN SERIES Service Manual

6.18 ABNORMAL VERTICAL HEIGHT
CHECK 24V
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r-----------------
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1
0K
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TOO LOW
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TOO LOW
MEASURE PIN 3 P406
ON PWB-1701
>
SEE SMP ITEM 6.3
CHECK 16V
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R201, 0202, R203, R205
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C202 FAILURE
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CHECK
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VERTICAL SIZE
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QRCUIT
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r------------------>
VERTICAL OSC
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~------------------> DEF. CIRCUIT
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L __________________
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READJUST
V. MODE
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0302, C312, 0303, R314
R346, R316, R345
D303, C304, R302
R312, C309, C302, D301
R309, C307, DY
FAILURE
V. HEIGHT
SEE ALIGNMENT
FAILURE CONDITION :
TOO SMALL AT PARTICULAR MODE
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>
CHECK SYNC. SIGNAL INPUT
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VIDEO
BOARD (PWB-1697)
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H+V, HjV, G+SYNC.
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L-______________________ _
=
6-17 =
->
CHECK MICROPROCESSOR 0512
MODE DETECTION CIRCUIT
PINS 13, 14, 15, 16, 36, 37