Philips 20MC4304, Service Manual

Page: 120 / 316

1-11-6
CRT/H.V. Block Diagram
T1006BLCRT
PULSE UP
AMP
THERMAL PR
O
TECTION
3
6
7 1
5
8
10
7 9 6
GREEN AMP
BLUE AMP
Q503
Q502
Q501
H.DRIVE
Q591
Q571
T572
V- DRIVE H- DRIVE
D.
Y
.
L551
IC551
(V
-DEFLECTION CONTR
OL)
T571 F
.B
.T
.
ANODE FOCUS SCREEN
CN502 CN503
CR
T CB
A
CL504A
R G B HEA
TER
ANODE
GND
V501 CR
T
GND FOCUS SCREEN
JK501
HEA
TER
1
1
CN501A
CL501B
CL501A
CN571
+180V
3
3
11
S F
HV
FOCUS VR
SCREEN VR
CN502
4 3 2
RED GREEN BLUE
H.OUTPUT
1 3 5 4
5 4 3 1
WF13
WF12
WF14
WF10
WF11
RED AMP
TP501
+B
TP504 GND
T
O
PO
WER SUPPL
Y
BLOCK DIA
GRAM
CN602
CN504
CL504B
JUNCTION CB
A
4 3 2
RED
2
GREEN
3
BLUE
4
T
O
TV
PR
OCESS
BLOCK DIA
GRAM
CN302
T
O
TV
PR
OCESS
BLOCK DIA
GRAM
CN301
T
O
TV
PR
OCESS
BLOCK DIA
GRAM
CN602
TP503
H-DRIVE
WF9
REC VIDEO
SIGNAL
PB VIDEO
SIGNAL
D
V
D VIDEO
SIGNAL
Mode :
SP/REC
+B
1
+B
2
+26V
8
V
-DRIVE
10
H-DRIVE
12
AFC
11
ACL
19
V
-RAMP-FB
17
NO
TE FOR
WIRE CONNECT
ORS:
1.
PREFIX SYMBOL "CN" MEANS CONNECT
OR.
(CAN DISCONNECT AND RECONNECT
.)
2.
PREFIX SYMBOL "CL" MEANS
WIRE-SOLDER
HOLES OF
THE PCB
.
(WIRE IS SOLDERED DIRECTL
Y
.)
TEST POINT INFORMA
TION
:INDICA
TES A
TEST POINT
WITH A JUMPER
WIRE A
C
R
OSS A HOLE IN
THE PCB
.
:USED
T
O
INDICA
TE A
TEST POINT
WITH A COMPONENT LEAD ON FOIL SIDE.
:USED
T
O
INDICA
TE A
TEST POINT
WITH NO
TEST PIN.
:USED
T
O
INDICA
TE A
TEST POINT
WITH A
TEST PIN.
SUB CBA