Acer V551 - Vertical Output

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Acer V551 (new) CRT Monitor Service Guide
Chapter 2 Circuit Operation Theory
8
Confidence and Property
(8) Vertical output
(a) TDA4866 is a vertical deflection amplifier, pin7 need a higher DC voltage (50V
currently) for deflection current amplify.
(b) TDA4866 pin1,2 is vertical drive input pin from TDA4857 pin12,13.
(c) Pin 4,6 is vertical deflection output pin to drive vertical YOKE.
(d) Pin8 provides the vertical blank signal for vertical retrace line canceling.
4
3
FEEDB
OUTA
GND
GUARD
VP
VFB
OUTB
INB INA
987 654 32 1
+
+
+
V-DY
C233
R262
R263
C232
IC202
C219
R227
Q201
R237
R236
C216
C21
5
C231
R238
R232
R231
R228
R233
R225
R224
R250
C214
C217
C218
R229
50V
2200P
(D)
3.3K
4.7K
(D)
50V
(OPEN)
TDA4866
250V
0.22U
(EL)
2W
1
H945
10K
10K
100V
100U
(EL)
25V
100
U
(EL)
(D)
50V
(OPEN)
68K
1/2W
10
1W
180
1W
1
(FS)
1/2W
100
820
820
2.4K
(1%)
(D)
50V
47P
(D)
50V
0.01U
100V
0.22U
(PE)
100
CLBL
V+
+50V
V1
G1
V2
+12V