Table of Contents
Advertisement
2.1.11 TILT CKT
We can rotate raster clockwise or counterclockwise by changing the direction of the current flow through
the tilt coil. When the voltage of MP202(pin3) is larger than 6.5V, the current flows from Q205 to Tilt coil,
other wise, the current flows from tilt coil to Q206
2.1.12 Vertical Output Circuit
This vertical driver IC circuit is a bridge configuration
The signals from TDA4854 differential output VOUT1 and VOUT2 are connected to TDA8351 via DC-
Coupled.
The vertical deflection coil is connected between the output amplifier (TDA 8351 pin4 and pin7) which are
driven in phase opposite. The TDA8351 can output current to drive vertical deflection yoke, it can be
calculated by :
I
*
R250 = I
R250
PIN8 ( GUARD) is used for vertical blanking.
Circuit Operation Theory
+12V
TILT
R244
2.4K
D205
(OPEN)
R245
(OPEN)
* R229
coil
+45V
FR234
100
9
8
1/2W
C220
+
22U
50V
(EL)
V-DY
3
4
Fig12 Vertical output circuit
R247
2.2K
R246
R248
10K
3.9K
Q204
H945
C225
+
2.2U
50V
(EL)
Fig 11 TILT circuit
IC202
TDA8351
7
6
5
4
C232
0.01U
50V
(D)
STANDBY
R227
(OPEN)
R229
1/2W
R228
0.5
75
1W
C217
1/2W
(OPEN)
100V
(MPE)
(NTC)
R236
C218
4.7K
2200P
50V
(D)
API Confidential
No Copy/Reproduction Allowed
+12V
+6.5V
MP202
3P
1
R249
330
2
1/4W
Q205
3
C1213A
TILT-COIL
Q206
A733
+12V
FR223
3
2
1
C213
D211
R250
+
2200U
1N4148
25V
1%
2K
(EL)
C216
47P
R225
50V
R224
(D)
1K
1K
C215
C214
0.015U
0.015U
100V
100V
(PE)
R230
(PE)
100
V1
V2
VBNK
1
1W
2-7
Advertisement
Table of Contents
