Schematic Insert; Schematic Notes; Pin Layouts; Capacitor And Resistor Codes - Sanyo DS25520 Service Manual

MODEL DS25520 Chassis No. 25520-00
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 adjusted 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
29.0KV AT ZERO BEAM CURRENT AT 120 VOLTS AC LINE, AND MUST NOT EXCEED 30.0KV UNDER ANY
OPERATING CONDITION. SEE HIGH VOLTAGE CHECK ON PAGE 8.
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 H-S
IF
UHF/VHF TUNER
WITH PLL
AGC
& BAND SW
RF AGC 1
28
BUS SCL
34
BUS SDA
32
6
IIC SCL
33
IC802
7
IIC SDA
EEPROM 31
RC IN
A1901
10
RC PRE-AMP
KEY IN
SW1901-1906
9
CONTROL KEYS
IC801
C809 X IN
CPU
19
WITH
CAPTION
C808
DECODER
X OUT
20
DIODES
X 801
A K
A
K
+12V
RL601
RELAY
A K
L901 PS601
A K DEGAUSING POSISTOR
COIL
T601
K
CONVERTER
F601 LF601 TRANS.
A
AC LINE
AC120V
60Hz FUSE FILTER
Q601
K A
SW.
C601
INFRARED EMITTING D601-D604
FULL WAVE Q611
RECTIFIER Q612
A....ANODE OSC D612
PHOTO
K....CATHODE
COUPLER
Q613
ERR.
4A 125V AMP.
3
12 x 10 = 12K ohm

VOLTAGE CHARTS

NOTE: Voltages were measured using color-bar signal and the controls adjusted for normal picture.
Device/Pin # Volts/Mode Device/Pin #
IC101-36
POWER ON: POWER OFF:
D612-1
30.6 10.5
IC101-37
IC101-38
POWER ON: POWER OFF:
D612-2
29.5 9.4 IC101-39
IC101-40
POWER ON: POWER OFF:
D612-3
0.7 0.4
IC101-41
IC101-42
POWER ON: POWER OFF:
D612-4
14.7 1.7 IC101-43
– 10%
IC001-1 6.7 IC101-44
IC001-2 15.4 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 1.4 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 2.1 IC101-58
IC101-8 2.7 IC101-59
IC101-9 3.8 IC101-60
IC101-10 3.6 IC101-61
IC101-11 4.3 IC101-62
IC101-12 1.5 IC101-63
IC101-13 1.5 IC101-64
IC101-14 1.4 IC101-65
IC101-15 0.2 IC101-66
IC101-16 8.2 IC101-67
IC101-17 2.5 IC101-68
IC101-18 2.2 IC101-69
IC101-19 2.4 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
IC101-31 GND
IC101-32 N.C.
IC101-33 1.0
IC101-34 1.8
IC101-35 N.C.
— 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.
SDL
5 IC3401
SCL
MTS DECODER
6
13
V-S
Q135 Q202
BUFFER BUFFER
IC101
SIGNAL PROCESS
SDA 9
2 MUTE
38 BUS
SCL 10
INTERFACE
4.5MHz
S SW X141 78/79 75 L164
FM SOUND
35 X161 ABL
SAW
S/COMP SW DET. TRAP
FILTER
4
RF AGC 77
AV1/AV2 SW 56 VIDEO
5 VIDEO
11
ACL DET.
Y 52 36 V-S
VIDEO
INT. VIDEO Y 54
SW. 37 H-S
33 H-PULSE
V
BEAM 49
SYNC
9/10 26 1
VOLTAGE
SEP.
DETECT.
11 CAP
ABL-IN VIDEO H
V2 13 H
30 OUT
V 14 HORIZ.
V1 12 L
DRIVER
S-Y 1 H
T401
Y DELAY
15 H-DRIVE
L LINE
V1/V2 2
TRANS.
Q1071
S-C 3 H
Q401
C 4 BUFF. BLACK 30
INT-V 5 L HORIZ.
STRETCH
DRIVE
SHARP
BPA
Y CV IN 40 HOLD DOWN HOLD DOWN
17
OSD (R) DETECT.
42 COLOR CONT
OSD (G) DEMOD BRITE
R
41
OSD (B) 12 17
40
OSD (BLK)
13 18 G
39 RGB
RESET OSD
Q831 14 OUT
25 SW. 19
AFT S-CURVE RESET
B
29 15
RESET
POWER FAIL 8
3
POWER
27
ON/OFF 15V
IC681 5V 35
ALWAYS
5V REG.
TJ1
+130V Q681
12V SW
12V
D624 DRIVE
D627
D625
IC601
+12V Q486 D801
9V
POWER
Q635 9V REG.
TJ5
REG. OVERLOAD
Q627
PROTECT.
12V SW.
5V
Q490
5V REG.
B6
STANDBY MODE
Q693,
ALWAYS +5V
Q695
CONTROL
Volts/Mode Device/Pin # Volts/Mode Device/Pin #
5.0 IC501-1 2.5
IC801-37
4.3 IC501-2 25.9 IC801-38
4.7 IC501-3 2.9 IC801-39
GND IC501-4 GND
IC801-40
0 IC501-5 11.5
IC801-41
GND IC501-6 26.5 IC801-42
GND IC501-7 2.6 IC802-1 GND
GND IC601-1 130.0
IC802-2 GND
2.3 IC601-2 29.2
IC802-3 GND
3.6 IC601-3 GND IC802-4 GND
2.1 IC681-1 13.4 IC802-5
3.1 IC681-2 GND
IC802-6
GND IC681-3 5.0 IC802-7 GND
2.5 IC801-1 4.0 IC802-8
GND IC801-2 3.9 IC1081-1
GND IC801-3 4.9
IC1081-2
2.6 IC801-4 0 IC1081-3
5.1 IC801-5 0 IC1081-4
2.9 IC801-6 0.3 IC1081-5
2.6 IC801-7 0
IC1081-6 GND
2.5 IC801-8 0 IC1081-7 GND
GND IC801-9 0 IC1081-8 GND
3.6 IC801-10 4.9 IC1081-9
4.4 IC801-11 GND
IC1081-10
4.4 IC801-12 4.8 IC1081-11
GND IC801-13 GND IC1081-12
GND IC801-14 4.9 IC1081-13
GND IC801-15 1.9
IC1081-14
GND IC801-16 0.2 IC1081-15
2.4 IC801-17 2.1 IC1081-16
2.2 IC801-18 GND IC3401-1
2.2 IC801-19 2.2
IC3401-2
0 IC801-20 2.0 IC3401-3
3.2 IC801-21 GND IC3401-4
GND IC801-22 4.9 IC3401-5
GND IC801-23 GND
IC3401-6
GND IC801-24 GND IC3401-7 GND
2.3 IC801-25 4.8 IC3401-8
GND IC801-26 0.3 IC3401-9
2.2
POWER ON: POWER OFF: IC3401-10
IC801-27
4.9 0
2.6 IC3401-11
2.2 IC801-28 3.9 IC3401-12
2.9 IC801-29 2.6
IC3401-13
2.9 IC801-30 0
IC3401-14
GND IC801-31 4.9 IC3401-15
IC801-32 3.6 IC3401-16
IC801-33 4.9
IC3401-17 GND
IC801-34 3.7
IC3401-18
IC801-35 4.8 IC3401-19
IC801-36 4.9 IC3401-20
IC3401-21
Note: Voltages were measured with offset color-bar signal and controls adjusted for normal picture.
TV OUT-L
39
TV OUT-R
38
LS OUT-L
4
3 LS OUT-R
33 34 36 37
Y
C
S-SW
K1051
S-VIDEO IN
(AV 2)
VIDEO IN-2
AUDIO IN-2 (L)
K1001 (Vertical Output)
REAR
AV IN
VIDEO IN-2 (R) (AV2)
AND
FIXED
FIXED AUDIO
AUDIO OUT (L) OUT
FIXED
Q001
AUDIO OUT (R)
POWER OFF
Q005
NOISE AUDIO +B
CANCEL
SWITCH
VIDEO IN-1
AUDIO +B
K1011
FRONT
AUDIO IN-1 (L)
AV IN
(AV 1)
VIDEO IN-1 (R)
V
DEFLECTION
YOKE
(Horizontal Output)
H L902
5
L 7 SP901
1
IC501 LEFT
SPEAKER
VERT. 2 IC001
AUDIO
OUTPUT
5 AMP. SP902
ABL R 6 3
1 RIGHT
6/7
H.V. SPEAKER
T402
HORIZ. FOCUS
OUTPUT
SCREEN
TRANS.
HEATER
9
Q402
V +B
HORIZ. 3
LOW +B
OUTPUT 8
4
D482
Q721 -R OUT
Q711 -G OUT
Q901
PIX TUBE
Q701 -B OUT
D481
+200V
D492
AUDIO +B
D802
D483
VERT +B
+26V
D428
D429
(13V)
ANODE LEAK
(7V)
DETECT.
R428
g7lam
Volts/Mode Device/Pin # Volts/Mode Device/Pin # Volts/Mode
4.9 IC3401-22 4.1 Q486-B 9.9
4.8 IC3401-23 3.7 Q486-C 11.6
0.2 IC3401-24 3.9 Q486-E 9.2
IC3401-25 4.1 Q490-B 5.9
0
0 IC3401-26 4.1 Q490-C 6.7
0 IC3401-27 4.1 Q490-E 5.2
IC3401-28 1.9
POWER ON: POWER OFF:
Q601-G
0.1
IC3401-29 4.1
IC3401-30 4.1
POWER ON: POWER OFF:
Q601-D
IC3401-31 2.0 15.1
4.9 IC3401-32 4.1
POWER ON: POWER OFF:
Q601-S
5.6
4.9 IC3401-33 4.1
IC3401-34 4.1
POWER ON: POWER OFF:
Q611-B
5.0 IC3401-35 0 4.6
2.5 IC3401-36 4.1
POWER ON: POWER OFF:
Q611-C
14.4
2.9 IC3401-37 4.1
2.5 IC3401-38 4.1
POWER ON: POWER OFF:
Q611-E
2,4 IC3401-39 4.1 5.6
2.4 IC3401-40 4.1
POWER ON: POWER OFF:
Q612-B
4.6
IC3401-41 4.1
IC3401-42 GND Q612-C GND
IC3401-43 4.1
POWER ON: POWER OFF:
Q612-E
0 IC3401-44 4.1 5.6
0 IC3401-45 4.2
POWER ON: POWER OFF:
Q613-B
0.2
0 IC3401-46 GND
2.9 IC3401-47 4.1
POWER ON: POWER OFF:
Q613-C
2.5 IC3401-48 4.1 4.7
2.9 Q613-E GND
POWER ON: POWER OFF:
Q001-B
0.7 0
2.9
POWER ON: POWER OFF:
Q627-B
9.3 12.7
POWER ON: POWER OFF:
Q001-C
4.1 0 6.3
POWER ON: POWER OFF:
Q627-C
Q001-E GND 13.2
4.1
Q005-B 9.6
4.1
POWER ON: POWER OFF:
Q005-C 10.3 Q627-E
4.1 13.3
Q005-E 10.3
3.6
POWER ON: POWER OFF:
Q135-B 2.2 Q635-B
4.0
3.7
Q135-C 5.0
POWER ON: POWER OFF:
Q135-E 1.5 Q635-C
4.1 29.2
Q202-B 1.7
4.1
POWER ON: POWER OFF:
Q202-C GND Q635-E
4.0
4.1
Q202-E 2.3
4.1
POWER ON: POWER OFF:
Q208-B 2.5 Q681-B
4.9 0.7
Q208-C GND
4.1 POWER ON: POWER OFF:
Q208-E 3.1 Q681-C
0
1.3
Q401-B 0.3
1.3 Q681-E GND
Q401-C 17.7
0
POWER ON: POWER OFF:
Q401-E GND Q693-B
0.5
Q402-B 1.1
3.2
POWER ON: POWER OFF:
Q402-C N/A
Q693-C
9.1 29.1
Q402-E 1.1
0
POWER ON: POWER OFF:
Q693-E
0.4
4.1
— 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
IC501- 5 IC501- 1 Q202-E (TP16)
(Horizontal Drive)
(Inverting Input) (Internal Video)
58 VERT 0.6V VERT 1.0V HORIZ
Q402- B T402- 9
Q601- G
(Power Switching) (Heater)
21V HORZ 15V 50KHz 28V HORIZ
Device/Pin # Volts/Mode
POWER ON: POWER OFF:
Q695-B
29.1 8.8
Q695-C GND
POWER ON: POWER OFF:
Q695-E
29.2 9.2
Q701-B 2.4
Q701-C 154.9
0.4 Q701-E 2.2
Q711-B 2.4
164 Q711-C 158.0
Q711-E 2.2
0 Q721-B 2.5
Q721-C 141.0
0.8 Q721-E 2.4
Q831-B 4.2
1.7 Q831-C 4.9
Q831-E 4.9
0.4 Q1071-B 2.9
Q1071-C GND
0.8 Q1071-E 2.4
0.4
0.1
0.1
8.0
0
8.0
1.3
9.0
1.3
0
8.1
6.5
8.4
6.0
— 28 —
IC101- 52
1.0V HORIZ
Q401- B
2.1V HORZ