Abnormal Picture; Abnormal Horizontal Width - NEC MultiSync 3D JC-1404HME Service Manual

5. ABNORMAL PICTURE
(5-1) ABNORMAL HORIZONTAL WIDTH
CHECK
IC156 OUTPUT
IC156 15k 20 25 30 35 40k
I
I
I
I
I '
NG
pin
6
I I I I I
I
I
I
I
0
•
I
I
: I:
I
K
pin 4
I
I
I
DIGITAL CONTROL I I I I
I
CIRCUIT FAILURE
:1
I
I I
pin 10
I I I
I
I
I
I
pin
12
I
I
I I
I
I
I I I
1
I
I
I
CHECKS-correction
Capacitors switching circuit
(0511~513)
NG
0511 ~0513 FAILURE
-
-
0 K
1
CHECK Horizontal resonant
capacitor circuit
NG
-
0524 FAILURE
0 K
•
CHECK Horizontal size control
NG
CHECK IC155 7 pin voltage is
-
circuit
-
changeable by H.SIZE control SW.
ioK +NG
0 K
IC512, 0510 DIGITAL CONTROL
"
T504, etc. CIRCUIT FAILURE
FAILURE
CHECK SIDE PIN control
circuit
0
NG
0401, 0406, T503, etc. FAILURE
K
,
NG
CHECK CRT ANODE VOLTAGE
(23.5kV at cut off)
-
MAIN DC/DC CONVERTOR FAILURE
toK
L503, L504, C532~535, FAILURE
I
(Cf). In the case of Factory adjustment at Horizontal width.
If it occers abnormal size by using width coil, please check
Input signal conditions. It must be setted VGA mode, Analog.
-37-
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