Memorex MT2252 Service Manual page 19

A B
8
FROM POWER
AT+10V
GND
7
6
TO SOUND
5
STEREO+5V
C620
R640
TU_AUDIO_OUT
25V 4.7 KA 1K R611
5
R632
100 1/2W
W817
4
FROM/TO MICON/TUNER
3
IF
Y_VIDEO
AT+5V
SYNC
TUNER+5V
RESET
AFT
AGC
GND
HD
POWER
OSD_B
OSD_BLK
OSD_G
VD
2
OSD_R
I2C_OFF
SDA
SCL
CAUTION: DIGITAL TRANSISTOR
1
A B
G-3
C
4.97
6
CF604
EFCT4R5MW5
5V REG
5.5
Q603
2SD734
R615
CF603
SFSH4.5MCB
470
2.9 2.3 NC 0 8.2 8.2 3.9 4.8 5.5
48 47 46 45 44 43 42 41
R634
2.3
10K
W830
3.0
AUDIO OUT
C604
2.3
AUDIO BYPASS
10K
50V 1 KA
NC
EXT AUDIO IN
C623
3.8
FM DIRECT OUT
46 SW REG CONT
120P CH
C632 50V 2.2 KA
47 LIMITER IN
3.1
VIF VCO F/B
48 IF AGC
R618 10M
49 QIF OUT
9.2
VREG Vcc
3.0
VIF APC FILTER
2.6
VIF VIDEO OUT
0
VIF GND
0
C621 0.01 F
0
AFT OUT
C626_1 64 VIF IN
2.9
QIF IN
1 VIF IN
0.001 Y
R606
1.8
RF AGC OUT
10K
C606
2.9
RF AGC FILTER
SAW FILTER
50V 0.1 KA
CF601 1.8
SAF45MFY220ZR
CHROMA IC
IN IN G OUT OUT
IC601
1 2 3 4 5 6 7 8
1 2 3 4 5 M61203CFP
1.5 5.0 5.0 2.7 4.9 6.2 6.2 0
L601_1
1.2uH
8
W833
CAUTION: DIGITAL TRANSISTOR
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C
D E
CHROMA SCHEMATIC DIAGRAM
(MAIN PCB)
5V REG
Q601
2SD734
7.6
5.6
5V REG
5V REG
Q605
Q604
2SD734
2SD734
5.6
5.6
8.2 15.0
REG
8.8
Q606
R639
2SD734
100
C647 50V 1 KA
7
R638 6.8K
D607
C661 0.01 F
1SS133
R646 12K
3.4 0 0 0 2.9 3.3 2.0 8.8
40 39 38 37 36 35 34 33
C638
50V 4.7 KANP
3.5
R642 D605
2.6
ACL/ABCL
33K 11E1-EIC
0
R IN
5.0
V PULSE OUT
0
G IN
34 EXT C in
33 8.7V REG OUT
0
FAST BLK
32 X'TAL
C610 50V 0.22 KA
7.3
SPOT KILLER
0
fsc OUT C645 6.3V 47 KA
NC
5.0
5.0
VIDEO CHROMA Vcc
C613
5.6
V RAMP CAP
R641 1 TF
2.5
V RAMP FEEDBACK
22K +-1%
17 V OUT
0
B IN
16 B OUT
8.2
STRAT UP Vcc
8.2
10
R648_1
4.5
100
9 10 11 12 13 14 15 16
0 4.9 3.5 4.9 4.9 4.0 4.0 4.8
11 12 13
9
R626
10K
R627 100
R630 100
R631 100 1/4W
3.6
0
0
V.SWITCH
Q609
0
0
DTC114EK
0 H.SWITCH
4.9 0 Q607
HV.SWITCH DTC114EK
Q602
4.9 DTA144EKA
NOTE:
THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
D E
F G
FROM/TO DEFLECTION/CRT
FBT+8V
V_OUT
ABCL
V_FEEDBACK
GND
H_OUT
H_SYNC
B.OUT
G.OUT
R.OUT
W826
CLAMP
TEST POINT
CP601
TKC-M06X-A1
B.OUT 6
INT.MONI 5
IIC_OFF 4
SDA 3
SCL 2
GND 1
DEFLECTION SIGNAL
AUDIO SIGNAL
TUNER VIDEO SIGNAL
R.SIGNAL
G.SIGNAL
B.SIGNAL
F G
H
8
7
6
5
4
3
2
PCB010
TMX458
1
H
G-4