Symphonic ST27S3, Service Manual

Page: 24 / 52

L6609BLCRT
CRT/H.V. Block Diagram
MAIN CBA
CRT CBA
7
4
8
6
11
10
9
RAMP-OUT
P-ON-H
V-RAMP-F/B
H-DRIVE
GREEN AMP
BLUE AMP
Q1512
Q1532
Q572 Q571
Q531
Q561
Q551,
Q552
VR562 VR561
PCC WIDTH
T572
1
3
4
5
FBP
ACL
V-
DRIVE
H-
DRIVE
DY551 D.Y.
IC551 V-DEFLECTION CONTROL
ANODE
FOCUS
SCREEN
WH301B TO WH301A
R
G
B
HEATER
ANODE
GND
V501
CRT
FOCUS
SCREEN
GND
JK1501
CN1501
WH501B WH501A
VIDEO SIGNAL
CN571
H.OUTPUT H.DRIVE
+B
15kHz
TP302
GND
TP1501
BLUE
TP1502
X-RAY
TP591 TP592
Q1522
PROTECT-3
DEF+B
AMP
7
1
Q532
6 3
PULSE
UP
THERMAL
PROTECTION
SWITCHING
P-ON-ON
5
(SWITCHING)
(SWITCHING)
WF7 WF8
WF11
WF12
WF9
WF10
WF3
WF15 WF4
WF14
WF5 WF13
RED AMP
PROTECT-2
RED 3
GREEN 4
BLUE 5
HEATER 3 3
+180V 1 1
PROTECT-1
H.
CONTROL
T571 F.B.T.
S
F
HV
11
8
3 4
10
7
1
5
FOCUS VR
SCREEN VR
FROM POWER
SUPPLY BLOCK
FROM/TO
IF/VIDEO BLOCK
FROM/TO
IF/VIDEO BLOCK
FROM
IF/VIDEO BLOCK
Q553
(SWITCHING)
6-7 6-8
TO
SYSTEM CONTROL
BLOCK
FROM/TO
SYSTEM CONTROL
BLOCK