Philips 20MC4304, Service Manual

Page: 217 / 316

1-10-2
T1102BLV
Video Block Diagram
LUMINANCE
SIGNAL PROCESS
MAIN CB
A
VIDEO (R)-1 HEAD
VIDEO (L)-1 HEAD
(DECK ASSEMBLY)
V(R)-1 V-COM1 V(L)-1
CL1401
9 8 7
V(L)-2 V-COM2 V(R)-2
6 5 4
Q1401
JK1701
VIDEO-IN
TP1401 V-OUT
VIDEO
AGC
TUNER
LINE
RP
FBC
VXO
Y/C MIX
CCD 1H
DELAY
R P
YNR/COMB FILTER
CHROMINANCE
SIGNAL PROCESS
IC1401 (VIDEO SIGNAL PROCESS/ HEAD AMP)
26
REC VIDEO SIGNAL
PB VIDEO SIGNAL
MODE: SP/REC
57
32 30
QV/QH
6dB
AMP
TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM
TO TV PROCESS BLOCK DIAGRAM
CYLINDER ASSEMBLY
RF-SW
RF-SW
59
V-ENV V-H-SW ENV-DET
ENV-DET
TP1402
X1401 3.58MHz
VIDEO (L)-2 HEAD
VIDEO (R)-2 HEAD
JM1403
ENV.
BUFFER
DV-SYNC
DV-SYNC
53 24
YCA-SCL
VIDEO TU-VIDEO EXT-V-IN
14
36
37
39
34
Q1402
BUFFER
58 60
SP EP
54
YCA-SDA
55
YCA-CS
SERIAL
I/F
VCA
CLAMP
69 70
49 50
SP HEAD AMP EP HEAD AMP
72 73 74 65 66 67
V-ENV
ROTA
ROTA/RF-SW
WF5
WF4
WF1
WF6
WF2
TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM
“
“ = SMD
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.