Toshiba 21N21N Service Manual page 22

A B
MICON/TUNER SCHEMATIC DIAGRAM
(MAIN PCB)
8
R104 R103 R102 R101
2.2K 1.2K 820 390
7
KEY_IN
P.FAIL
R120
4.7K
C140
FORTHD_VCR_2
FORTHD_VCR_1
220P CH
C108
0.1 B
EMERGENCY
6 R152
OSC_IN
22P CH
4.7K
X101 OSC_OUT
100CT4R013
ON_TIMER
C109
1
22P CH
5
H_CONT
C143
PROTECT
0.1 B
R153
AV2 10K
AV1
V_SYNC
2
R107 1K
H_SYNC
D102 MTZJ5.1B
3
D108
1SS133
4
PXFM
4
R108
3
270
C101
68P CH
C105
0.1 B
C106
0.022 B
2
1
A B
C
LED DRIVE
ON TIMER
Q102
D103
2SA1037AK
R137
LED DRIVE
3.6 3.1
180
STAND BY/P.ON Q103
LTL-1CHGE-002A
0 2SA1037AK
D101
GREEN
R132
3.1 3.1
560
SLR-342VCT32
2.4
RED
MICON W/T.TEXT IC
IC101 OECF006A
4.9 4.9
KEY_IN REMORT
4.9 4.9
POWER FAIL RESET
C130
0 0
R117
63V 1 MKT
FORTHD VCR 2 A MUTE
R151
10K 0 4.9
FORTHD VCR 1 STEREO RESET NC
C141 4.7K
0 0
EMERGENCY
DEGAUSS
1.9 0
OSC_IN TU/RGB
2.3 0
OSC_OUT (BBE-H) NC
4.8 1.6
ON_TIMER (ATS)
4.9 0.2
NC P4.6/PWM6 STANDBY LED
R148
0 4.8
10K
SECAM_VL_H POWER
NC
5.0 0
NC TUNER HI CSO/RESET0/P3.7 NC
R133 R134
0 4.9
10K 10K
H_CONT
I2C_OFF
0 4.9
PROTECT P3.5 NC
R123
0 0
10K
AV2 P3.4 NC
C125
R124
0 0.7
100P CH
10K
AV1 OSD_B
C126
4.7 0.2
100P CH
V_SYNC OSD_G
R116 C127 R140
0.6 0.2
10K 100P CH 1.8K
H_SYNC OSD_R
R131 C128
4.9 0
100K 150P CH
AVDD1 OSD_FB
R141
2.0 2.0
R128
1.8K
PXFM SDA
100
0 2.5
R129
JTRSTO SCL
100
0 4.9
GND VDD
C114 0.1 B
0 2.5
C115
AGND JTDO NC R142
1.6 0
C111 6.3V 2200 YK 1.8K
CVBS1 WSCF
0.47 B
1.8 0
C112 R143
CVBS2 VPP
82P CH 1.5K
4.7 4.9
C118
NC JTMS AVDD3
0.1 B
4.9 4.9
AVDD2
TEST0
1.6
0.6
R113
NC MCFM
CVBSO
5.6K
4.8
2.1
R111
TXCF JTCK NC
15K
SH101
763WSA0087
C
D E
NC NC
0 0
OS101
5 4
RPM7138-H5
4.9 0 4.9
1 2 3
4.9 4.9 0
C122
16V 10 KA
C120
1 B
R105 W832
10K
REMORT
RESET
A_MUTE
DEGAUSS
ATS
STB_LED
POWER
I2C_OFF
DATA
CLK
B
G
R
FB
VDD
L101
10uH 0305
5 6
7 8
L102
10uH 0305
D E
F G
TU001 TUWRF4EG-778F2
VCO
NC
TP001
R121
100
9
DATA
10
CLK
4.9 0 2.5 2.0
8 7 6 5
1 2 3 4
0 0 0 0
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.
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
F G
H
8
ACCESSORY
BT101
R03(AB)2PXGPI
CP001
003P-2100
BT102
R03(AB)2PXGPI
TM101
R25-1800
TEST POINT
7
CP101
06JQ-ST
GND 1
I2C SCL 2
I2C SDA 3
I2C OFF 4
RF AGC 5
NC NC 6
FROM/TO POWER
P.CON+5V
TUNER_BT
P.FAIL
6
AT+5V_AVDD
AT+5V_DVDD
GND
DEGAUSS
POWER
EMERGENCY
FROM/TO IF/CHROMA
RF_AGC
IF
SCL
5
SDA
OSD_FB
OSD_R
OSD_G
OSD_B
H_CONT
CVBS_TXT
PROTECT
V_OUT
ATS
TO SOUND AMP
4
A_MUTE
FROM DEFLECTION/CRT
AFC
FROM/TO 21PIN
AV1
AV2
FORTHD_VCR_1
TU/RGB
3
2
PCB010
TMB545
1
H