MEA 1786FD2 CRT Monitor Service Guide
Trouble Shooting
8
7. PINCUSHION NG
TRAPEZOID NG
UNBALANCE NG
PARALLEGRAM NG
H-PHASE NG
V-CENTER NG
GEOMETRIC FUNCTION NG
CHECK MCU,IF OK REPLACE IC201
8. NO VERTICAL OUTPUT &
RETRACE LINE NO BLANKING
NO VERTICAL OUTPUT
CHECK B+ CORRECT ?
PIN 3(+14V) &
PIN 7(+45V)
IF PIN3 FAILS CHECK FR223
IF PIN7 FAILS CHECK +45V &
FR234
NO
CHECK IC201 (TDA4856)
PIN12 PIN13 OUTPUT
CORRECT ?
YES
REPLACE
REPLACE
IC202
(TDA4866)
OK
NG
CHECK
R275,R274
YES
REPLACE
IC201
(TDA4856)
NO
OK
NG
NO VERTICAL BLANKING
CHECK IC202(TDA4866)
PIN8 OUTPUT CORRECT?
REPLACE
IC202
(TDA4866)
NG
CHECK
IC201(TDA4856)
PIN16 OUTPUT
CORRECT ?
OK
REPLACE
IC201
(TDA4856)
NG
CHECK
R254,C223,Q202,R239,
R232
YES
NG
Содержание 1786FD2
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