Block Diagram; Voltage Charts; Waveforms; Schematic Diagrams - Sanyo DS19204 Service Manual

MODEL DS19330 Chassis No. 19330-02

SCHEMATIC DIAGRAMS

NOTES ON SCHEMATIC DIAGRAMS
1. All resistance values in ohms K=1,000 M=1,000,000.
2. Unless otherwise noted on schematic, all capacitor values less than 1 are expressed in µF (Micro Farad),
and the values more than 1 are in pF.
3. Unless otherwise noted on schematic, voltage reading taken with VOM from point indicated to chassis
ground. Voltage reading taken using color-bar signal VHF channel 5, all controls at normal. Line voltage at 120
volts. Some voltages may vary with signal strength.
4. Waveforms were taken with color-bar signal and controls set for normal picture. Waveforms marked with
an may vary with signal strength.
5. The Symbol indicates a fusible resistor, which protects the circuit from possible short circuits.
SERVICE NOTES:
1. When replacing parts on circuit boards, clamp the lead wires to terminals before soldering.
2. When replacing high wattage resistors on circuit board, keep the resistor body 10 mm (3/8) from circuit board.
3. Keep wires away from high voltage and high temperature components.
PRODUCT SAFETY NOTICE
THE COMPONENTS DESIGNATED BY A STAR ( ) ON THIS SCHEMATIC DIAGRAM DESIGNATE COMPONENTS
WHOSE VALUES ARE OF SPECIAL SIGNIFICANCE TO PRODUCT SAFETY. SHOULD ANY COMPONENT
DESIGNATED BY A STAR NEED TO BE REPLACED, USE ONLY THE PART DESIGNATED IN THE PARTS LIST. DO NOT
DEVIATE FROM THE RESISTANCE, WATTAGE AND VOLTAGE RATINGS SHOWN.
X-RADIATION WARNING NOTE
THIS TV CONTAINS CRITICAL PARTS TO PROTECT AGAINST X-RADIATION. NOMINAL 2ND ANODE VOLTAGE IS
26.0KV AT ZERO BEAM CURRENT AT 120 VOLTS AC LINE, AND MUST NOT EXCEED 27.8KV UNDER ANY
OPERATING CONDITION. SEE HIGH VOLTAGE CHECK ON PAGE 7.
INTEGRATED CIRCUITS PHOTO COUPLERS TRANSISTORS
TOP VIEW
TOP VIEW
B
B B B
E C E C E C B
E C
MARK 1 1 E C
1
COUNT TERMINALS IN
ARROW DIRECTION
SIDE VIEW
C E
C E E C
B E
B B C
B
B ... BASE
C ... COLLECTOR
1
1 1 E ... EMITTER
CHIP TRANSISTORS CHIP RESISTORS
TOP VIEW TOP VIEW
C
B ... BASE
1
C ... COLLECTOR
1 3 3 2 E ... EMITTER
2 OUT
1
1
GND (3)
IN
(2)
(1) B E
CAPACITOR AND RESISTOR CODE CHART
CAPACITOR (Example)
500 C K 1500 B D ........................... ±0.5pF
T ............................ +50%
J ............................ ±5%
K ........................... ±10%
M ........................... ±20%
N ........................... ±30%
Characteristics P ...........................
+100% –
Value code Z ........................... +80%
Tolerance code C ........................... ±0.25pF
Material code C ........................... Ceramic
Voltage rating E ........................... Electrolytic
F ........................... Polyester
N ........................... Polypropylene
T ............................ Tantalum
K ........................... Ceramic
H ........................... MT-Composite
P ........................... NP. Electrolytic
M ........................... MT-Polypropylene
RESISTOR (Example)
6 Y K 4.7 D ........................... ±0.5%
F ........................... ±1%
G ........................... ±2%
J ............................ ±5%
Value code K ........................... ±10%
Tolerance code M ........................... ±20%
Material code F ............................ Fusible
Wattage rating N ........................... Metalized Carbon
S ........................... Oxide Metalized
Y ........................... Wire Wound
C ........................... Solid
D ........................... Carbon Film
W .......................... Wire Wound
— 25 —
CAUTION

BLOCK DIAGRAM

4A 125V
ANT
A101
UHF/VHF TUNER IF
WITH PLL
AGC
& BAND SW
RF AGC
9
BUS SCL
4
BUS SDA
3
6 IIC SCL
2
IC802
7 IIC SDA
EEPROM 1
RC IN
A1901
28
RC PRE-AMP
KEY IN
SW1901-1906
12
CONTROL KEYS
C809
X IN
6
C808
X OUT
7
X 801
DIODES
A K
A
K
A K
L901 PS601
A K DEGAUSING POSISTOR
COIL
K
A F601 LF601
AC120V AC LINE
60Hz FUSE FILTER
K A
Q601
SW.
INFRARED EMITTING
C601
D601-D604
FULL WAVE
A....ANODE
RECTIFIER
K....CATHODE
Q613
ERR.
AMP.
4A 125V
3
12 x 10 = 12K ohm

VOLTAGE CHARTS

NOTE: Voltages were measured using color-bar signal and the controls set for normal picture.
Device/Pin # Volts/Mode Device/Pin #
IC101-36
POWER ON: POWER OFF:
D612-1
26.1 9.7
IC101-37
IC101-38
POWER ON: POWER OFF:
D612-2
25.1 8.5 IC101-39
IC101-40
POWER ON: POWER OFF:
D612-3
0.2 0.3
IC101-41
IC101-42
POWER ON: POWER OFF:
D612-4
4.0 0.2 IC101-43
– 10%
IC001-1 5.8 IC101-44
IC001-2 12.8 IC101-45
IC001-3 N.C. IC101-46
IC001-4 GND IC101-47
IC001-5 N.C. IC101-48
0%
IC001-6 N.C. IC101-49
– 20%
IC001-7 1.6 IC101-50
IC001-8 GND IC101-51
IC101-1 GND IC101-52
IC101-2 GND IC101-53
IC101-3 GND IC101-54
IC101-4 GND IC101-55
IC101-5 GND IC101-56
IC101-6 5.1 IC101-57
IC101-7 2.4 IC101-58
IC101-8 2.4 IC101-59
IC101-9 4.5 IC101-60
IC101-10 4.5 IC101-61
IC101-11 3.8 IC101-62
IC101-12 0.1 IC101-63
IC101-13 0.1 IC101-64
IC101-14 0.1 IC101-65
IC101-15 0.2 IC101-66
IC101-16 8.2 IC101-67
IC101-17 2.5 IC101-68
IC101-18 2.4 IC101-69
IC101-19 2.5 IC101-70
IC101-20 GND IC101-71
IC101-21 GND IC101-72
IC101-22 GND IC101-73
IC101-23 GND IC101-74
IC101-24 GND IC101-75
IC101-25 N.C. IC101-76
IC101-26 2.1 IC101-77
IC101-27 2.6 IC101-78
IC101-28 5.3 IC101-79
IC101-29 2.7 IC101-80
IC101-30 0.4 IC501-1
IC101-31 GND IC501-2
IC101-32 N.C. IC501-3
IC101-33 1.0 IC501-4
IC101-34 1.8 IC501-5
IC101-35 N.C. IC501-6
IC501-7
— 26 —
FOR CONTINUED PROTECTION AGAINST
A RISK OF FIRE, REPLACE ONLY WITH
THE SAME TYPE 4A, 125V FUSE.
ATTENTION: POUR MAINTENIR LA PROTECTION
CONTRE LES RISQUES D' INCENDIE UTILISER UN
FUSIBLE DE RECHANGE DE MEME TYPE 4A, 125V.
EXT. VIDEO
INT. VIDEO
H-S
V-S
IC101
SIGNAL PROCESS
SDA 9
18 17
BUS
SCL 10
INTERFACE
X141 73
78/79
FM
SAW SW
66
DET.
FILTER
RF AGC 77
56 VIDEO
VIDEO
11
ACL DET.
EXT. VIDEO Y 52 36 V-S
VIDEO
Y 54
INT. VIDEO SW. 37 H-S
33
V
49
BEAM
SYNC 26
VOLTAGE
CAP SEP.
DETECT.
VIDEO
ABL-IN OUT H
11 HORIZ.
DRIVER
IC801
CPU DELAY
WITH LINE
CAPTION
DECODER Q401
BLACK 30
HORIZ.
STRETCH
DRIVE
SHARP
BPA HOLD DOWN
Y CV IN 40
15
OSD (R)
COLOR CONT
19
OSD (G) DEMOD BRITE
20
OSD (B)
12 17
21
OSD (BLK)
13 RGB
22 18
OSD OUT
RESET Q831
14 19
13 SW.
RESET
AFT S-CURVE
15
10
POWER FAIL 8
25
POWER
33
ON/OFF
5V
T601 IC681
ALWAYS
CONVERTER 5V REG.
TRANS. TJ1
+135V Q681 D802
D625
12V SW
DRIVE
D624 12V
D626
+12V Q486 D801
26V 9V
9V REG.
TJ5
D612
Q627
IC601
PHOTO 12V SW.
POWER
COUPLER 5V
REG. Q490
5V REG.
B6
26V
STANDBY MODE
Q693,
ALWAYS +5V
Q695
CONTROL
Volts/Mode Device/Pin # Volts/Mode Device/Pin #
5.0 IC601-1 136.0 Q401-B
Q401-C
4.3 IC601-2 29.2
Q401-E
4.7 IC601-3 GND
GND IC681-1 13.4 Q402-B
0 IC681-2 GND Q402-C
Q402-E
GND IC681-3 5.0
Q486-B
GND IC801-1 5.0
GND IC801-2 5.0 Q486-C
Q486-E
2.0 IC801-3 4.4
Q490-B
3.4 IC801-4 4.3
Q490-C
1.8 IC801-5 GND
2.8 IC801-6 1.9 Q490-E
GND IC801-7 2.7 POWER ON:
Q601-G
2.2 IC801-8 5.0
GND IC801-9 2.7 POWER ON:
Q601-D
GND IC801-10 2.4
2.5 IC801-11 0 POWER ON:
Q601-S
4.9 IC801-12 0
2.7 IC801-13 4.9
POWER ON:
Q613-B
2.5 IC801-14 3.5
2.2 IC801-15 2.7 POWER ON:
Q613-C
GND IC801-16 4.6
3.6 IC801-17 5.1 Q613-E
4.4 IC801-18 4.3
POWER ON:
Q627-B
4.4 IC801-19 0
GND IC801-20 0 POWER ON:
Q627-C
GND IC801-21 0
GND IC801-22 0.4
POWER ON:
Q627-E
GND IC801-23 4.9
2.4 IC801-24 4.9 POWER ON:
Q681-B
2.2 IC801-25 4.9
2.2 IC801-26 GND
POWER ON:
Q681-C
2.4 IC801-27 GND
Q681-E
3.2 IC801-28 4.9
GND IC801-29 GND
POWER ON:
Q693-B
GND IC801-30 GND
GND IC801-31 GND POWER ON:
Q693-C
2.3 IC801-32 GND
GND
POWER ON: POWER OFF: POWER ON:
IC801-33 Q693-E
2.2 4.9 0
2.6 IC801-34 N.C. POWER ON:
Q695-B
2.6 IC801-35 4.9
2.9 IC801-36 5.0 Q695-C
IC802-1 GND
2.9 POWER ON:
Q695-E
GND IC802-2 GND
2.5 IC802-3 GND
25.9 IC802-4 GND
2.9 IC802-5 4.9
GND IC802-6 4.9
11.5 IC802-7 GND
26.5 IC802-8 5.0
2.6
Note: Voltages were measured with offset color-bar signal and controls set for normal picture.
IC001
7 1 SP901
AUDIO
SPEAKER
AMP.
K1003
FRONT
AV IN
EXT. VIDEO
EXT. AUDIO
(Vertical Output)
TP 16
ABL
H-PULSE
DEFLECTION
V YOKE
L902
5
H
(Horizontal Output)
1 IC501
VERT.
AFC
OUTPUT
5
ABL
1 6/7
H.V.
T402
HORIZ. FOCUS
T401
OUTPUT
H-DRIVE SCREEN
TRANS.
TRANS.
HEATER
9
Q402
4
HORIZ.
OUTPUT
D482
HOLD DOWN
DETECT.
R Q721 -R OUT
G Q711 -G OUT
Q901
PIX TUBE
B Q701 -B OUT
200V
D481
D428
D429 (13V)
ANODE LEAK
(7V)
DETECT.
R428
g8mam
Volts/Mode Device/Pin # Volts/Mode
0.3 Q701-B 2.4
17.7 Q701-C 138.7
GND
Q701-E 2.2
2.9 Q711-B 2.4
N/A Q711-C 139.8
3.0 Q711-E 2.2
9.9
Q721-B 2.6
10.5 Q721-C 134.1
9.2 Q721-E 2.4
5.9 Q831-B 4.2
6.7
Q831-C 4.9
5.2 Q831-E 4.9
POWER OFF:
4.0 0.3
POWER OFF:
156 169
POWER OFF:
0.2 0
POWER OFF:
0.2 0.1
POWER OFF:
3.9 0.1
GND
POWER OFF:
12.7 8.0
POWER OFF:
13.2 0
POWER OFF:
13.3 6.6
POWER OFF:
0.7 0
POWER OFF:
0 9.1
GND
POWER OFF:
0.5 7.0
POWER OFF:
25.0 7.2
POWER OFF:
0.3 6.5
POWER OFF:
25.1 7.9
GND
POWER OFF:
25.1 8.5
— 27 —

WAVEFORMS

IC101- 17 IC101- 18 IC101- 19
(R-Output) (G-Output) (B-Output) (Video Input)
3.4V HORIZ 3.4V HORIZ 3.4V HORIZ 1.0V HORIZ
IC501- 5 IC501- 1 TP16
(Horizontal Drive)
(Inverting Input) (Internal Video)
50 VERT 0.6V VERT 1.0V HORIZ 0.9V HORZ
Q402- B T402- 9
Q601- G
(Power Switching) (Heater)
21V HORZ 15V 50KHz 28V HORIZ
— 28 —
IC101- 52
Q401- B