Magnavox 19MDTR20 Service Manual page 25

Chroma Block Diagram
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.
TU1001
(TUNER UNIT)
10
SDA
9
SCL
13
FSC
AFT 16
IC1802
(OUTPUT SELECT)
FROM/TO SCL 4
SERVO/
SDA
SYSTEM
C-SYNC
CONTROL
AFT
BLOCK
D-REC-H
Q1806
IC1201 (OSD)
CV-IN
OSD-R
OSD-G
OSD-B
OSD-BLK
WF16
V-SYNC
WF15
H-SYNC
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
MAIN CBA
IC1301 (VIDEO/AUDIO/CHROMA/DEFLECTION)
31
14
SERIAL
I/F
15
INTELLIGENT
6
MONITORING
VCR
5
SYNC
SEPARATION
3 16
DVD
SWCTL
9
V-SYNC H-SYNC
PROCESS PROCESS
CIRCUIT CIRCUIT
56
64 12
11
63
62 10
60 13
59 9
8
58
35
34
1-5-9
REC VIDEO SIGNAL
+8V
30
+5.7V
REG.
TUNER
VCR
LINE
S-Y
TUNER
VCR
LINE
CHROMA CHROMA
S-C
TRAP BPF
FILTER
VXCO
TUNING
LUMA CHROMA
SIGNAL SIGNAL
PROCESS PROCESS
CIRCUIT CIRCUIT
OSD MIX/RBG MATRIX/
BLIGHT/DRIVE AMP/
HV BLANKING
PB VIDEO SIGNAL DVD VIDEO SIGNAL
TO POWER
27 +5V CTRL
SUPPLY BLOCK
23 TV-VIDEO
FROM
25 V-OUT
VIDEO BLOCK
20 EXT-V-IN
29
CN2804 Q2210
CN1803
14 DVD-Y 14 BUFFER 12
28 10
15 DVD-C 15
Q2211
BUFFER
X1301
3.58MHz
WF18
18
WF17
TP2204
TP2203
DVD-C
DVD-Y
POWER SUPPLY/AV CBA
CN1301
2
12 RED
3 11 GREEN
4 10 BLUE
FROM/TO
3 FBP
CRT/H.V. BLOCK
4 H-DRIVE
CN503
7 ACL/ABL
8 V-DRIVE
WF9
5 V-RAMP-FB
40
41
5
1-5-10
CN2401 FROM DIGITAL
SIGNAL PROCESS
DVD-Y
BLOCK
DVD-C
<DVD SECTION>
CN601
TD857BLC