Block Diagram; Voltage Charts; Capacitor And Resistor Codes - Sanyo DS27820 Service Manual

MODEL DS27820 Chassis No. 27820-00
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 B
E C E C
MARK 1 1 E C
1
COUNT TERMINALS IN
ARROW DIRECTION
SIDE VIEW
C E
E
C E C
B B C E
B
B
B ... BASE
C ... COLLECTOR
1
1 E ... EMITTER
1
CHIP TRANSISTORS CHIP RESISTORS
TOP VIEW TOP VIEW
C
B ... BASE
1
C ... COLLECTOR
1 3 3 2 OUT E ... EMITTER
2
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
— 29 —
CAUTION

BLOCK DIAGRAM

4A 125V
Q8083
PIP Q8076 Q8073
PIP CVBS IN
SYNC CVBS
IN IN
22 13 IC8001
PIP CONTROLER
23
24 25 45 47 8 51 49 32 33
Q8090
Q8005 Q8006
ANT
A101
IF
UHF/VHF TUNER
WITH PLL
AGC
& BAND SW
H-S V-S
RF AGC
1 2 MUTE
28 38
S1-SW
12
BUS SCL
S2-SW
34
35
BUS SDA
PIP TV/AV
32
7
PIP AV 1/2
6 IIC SCL
6
33
IC802
MAIN AV 1/2
7 IIC SDA
5
EEPROM 31
RC IN
A1901
BEAM
10
RC PRE-AMP VOLTAGE
DETECT.
KEY IN ABL-IN
SW1901-1906
9 30
CONTROL KEYS
C809 IC801
X IN
IN SELECT
CPU
19 13
WITH
CAPTION
C808
X OUT OUT SELECT
DECODER
20 11
X 801
DIODES
Y CV IN
17
OSD (R)
42
OSD (G)
A K 41
OSD (B)
40
A K OSD (BLK)
39
RESET
+12V 25
AFT S-CURVE
29
A K
RL601 POWER FAIL
A K L901 PS601
3
RELAY
DEGAUSING POSISTOR
POWER
COIL 27
ON/OFF
K
T601
A CONVERTER
D694
F601 LF601 TRANS. D621
AC LINE
A AC120V
K
FUSE FILTER
60Hz
D624
Q601
INFRARED EMITTING
SW.
D625
C601 IC601
A....ANODE D601-D604
POWER
FULL WAVE Q604
K....CATHODE REG.
D612
RECTIFIER OSC
PHOTO
COUPLER
Q605
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 # Volts/Mode
POWER ON: POWER OFF: IC101-42 GND
D612-1
31.9 10.9
IC101-43 GND
IC101-44 2.2
POWER ON: POWER OFF:
D612-2
31.0 9.8 IC101-45 3.7
IC101-46 2.0
POWER ON: POWER OFF:
D612-3
–.3 0.6 IC101-47 3.0
IC101-48 0
POWER ON: POWER OFF:
D612-4 IC101-49 2.5
13.3 1.4
– 10%
IC101-50 GND
IC001-1 7.4
IC101-51 GND
IC001-2 GND
IC101-52 2.8
IC001-3 7.7
IC101-53 5.2
IC001-4 15.5
IC101-54 2.7
IC001-5 7.9
IC101-55 2.7
0%
IC001-6 10.8
IC101-56 2.3
IC001-7 2.2
– 20%
IC101-57 GND
IC001-8 1.4
IC101-58 3.6
IC001-9 GND
IC101-59 4.4
IC001-10 1.4
IC101-60 4.4
IC101-1 GND
IC101-61 GND
IC101-2 GND
IC101-62 GND
IC101-3 GND
IC101-63 GND
IC101-4 GND
IC101-64 GND
IC101-5 GND
IC101-65 2.5
IC101-6 5.1
IC101-66 2.3
IC101-7 2.0
IC101-67 1.9
IC101-8 2.6
IC101-68 2.5
IC101-9 3.6
IC101-69 3.2
IC101-10 3.7
IC101-70 GND
IC101-11 4.0
IC101-71 GND
IC101-12 1.5
IC101-72 GND
IC101-13 1.5
IC101-73 2.3
IC101-14 1.5
IC101-74 0
IC101-15 0
IC101-75 2.3
IC101-16 8.3
IC101-76 2.7
IC101-17 2.5
IC101-77 2.3
IC101-18 2.5
IC101-78 2.9
IC101-19 2.5
IC101-79 2.9
IC101-20 2.25
IC101-80 GND
IC101-21 GND
IC301-1 0.9
IC101-22 GND
IC301-2 4.8
IC101-23 GND
IC301-3 2.0
IC101-24 GND
IC301-4 0
IC101-25 2.0
IC301-5 5.1
IC101-26 2.4
IC301-6 5.1
IC101-27 2.6
IC301-7 0.3
IC101-28 5,3
IC301-8 –0.3
IC101-29 2.8
IC301-9 0.6
IC101-30 0.6
IC301-10 0
IC101-31 GND
IC301-11 0
IC101-32 4.9
IC301-12 1.5
IC101-33 1.0
IC301-13 GND
IC101-34 1.8
IC301-14 1.9
IC101-35 4.8
IC301-15 0
IC101-36 3.9
IC301-16 1.5
IC101-37 4.0
IC501-1 GND
IC101-38 4.7
IC501-2 13.7
IC101-39 GND
IC501-3 27.1
IC101-40 0
IC501-4 2.9
IC101-41 GND
— 30 —
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
C1/C2
INT. VIDEO
Q135 Q202
BUFFER BUFFER
IC101
SIGNAL PROCESS
SDA 9
BUS
SCL 10
INTERFACE
4.5MHz
L164
X141 78/79
FM 75 SOUND
X161
SAW
DET. TRAP
FILTER
RF AGC 77
56 VIDEO
VIDEO
11
ACL DET.
Y 52
36 V-S
VIDEO
C 54
SW. 37 H-S
33
Q208 V
49
SYNC 26 5
SEP.
CAP
C Y VIDEO H
OUT
HORIZ.
12 16 14 DRIVER
2
T401
3 DELAY
H-DRIVE
LINE
COMB 1
TRANS.
FILTER
15 7 SC
Q401
BLACK 30
H PULSE HORIZ.
STRETCH
DRIVE
9
S CLOCK 3.58 44 SHARP
BPA
40 HOLD DOWN HOLD DOWN
DETECT.
COLOR CONT
DEMOD BRITE
12 17
13 RGB
18
OUT
OSD
Q831 14
19
SW.
RESET
15
RESET
8
32 5V
IC681 5V
B9
5V REG. ALWAYS
B9
+16V
Q681
+130V 12V SW
12V
DRIVE
D627
B4
+12V D801
Q486
9V
Q635
9V REG.
OVERLOAD
PROTECT. Q627
12V SW.
5V
Q490
STANDBY MODE
Q693, 5V REG. B6
ALWAYS +5V
Q695
CONTROL
Q8000
PIP VCC
3.3V REG.
3.3V
Device/Pin # Volts/Mode Device/Pin # Volts/Mode
IC501-5 2.9 IC802-1 GND
IC802-2 GND
IC501-6 26.2
IC501-7 3.0 IC802-3 GND
IC501-8 2.9 IC802-4 GND
IC501-9 2.9 IC802-5 4.9
IC501-10 13.3 IC802-6 4.9
IC802-7 GND
POWER ON: POWER OFF:
IC601-1
IC802-8 4.9
129.2 92.5
IC1001-1 0
POWER ON: POWER OFF:
IC601-2
IC1001-2 0
31.1 9.8
IC1001-3 6.5
IC601-3 GND
IC1001-4 6.5
IC681-1
POWER ON: POWER OFF:
IC1001-5 6.5
11.6 7.3
(IN)
IC1001-6 GND
IC681-2 GND
IC1001-7 GND
IC681-3
POWER ON: POWER OFF:
IC1001-8 GND
5.0 5.0
(OUT)
IC1001-9 0
IC801-1 4.0
IC1001-10 0
IC801-2 3.9
IC1001-11 9.3
IC801-3 4.9
IC1001-12 0.7
IC801-4 9.1
IC1001-13 2.5
IC801-5 0
IC1001-14 2.5
IC801-6 0
IC1001-15 0
IC801-7 0
IC1001-16 9.3
IC801-8 0.3
IC1002-1 6.3
IC801-9 0
IC1002-2 6.2
IC801-10 4.9
IC1002-3 2.4
IC801-11 0
IC1002-4 2.7
IC801-12 4.8
IC1002-5 2.7
IC801-13 4.9
IC1002-6 GND
IC801-14 4.9
IC1002-7 GND
IC801-15 1.9
IC1002-8 GND
IC801-16 0.2
IC1002-9 0
IC801-17 2.1
IC1002-10 0
IC801-18 GND
IC1002-11 0
IC801-19 2.2
IC1002-12 6.0
IC801-20 2.0
IC1002-13 6.2
IC801-21 GND
IC1002-14 6.0
IC801-22 4.9
IC1002-15 6.2
IC801-23 0.2
IC1002-16 9.1
IC801-24 0.2
IC3401-1 4.1
IC801-25 4.8
IC3401-2 4.1
IC801-26 0.3
IC3401-3 4.1
POWER ON: POWER OFF:
IC801-27 IC3401-4 4.1
4.9 0
IC3401-5 3.6
IC801-28 2.3
IC3401-6 3.7
IC801-29 2.6
IC3401-7 GND
IC801-30 0
IC3401-8 4.1
IC801-31 4.9
IC3401-9 4.1
IC801-32 3.6
IC3401-10 4.1
IC801-33 4.9
IC3401-11 4.1
IC801-34 3.7
IC3401-12 4.9
IC801-35 4.8
IC3401-13 4.1
IC801-36 4.9
IC3401-14 1.3
IC801-37 4.9
IC3401-15 1.3
IC801-38 0
IC3401-16 0
IC801-39 0
IC3401-17 GND
IC801-40 0
IC3401-18 3.2
IC801-41 0
IC801-42 0
NOTE: Waveforms were taken with color-bar signal and the controls adjusted for normal picture.
SP902
1
L 10
4 (L) SPEAKER
R 8
IC001 (L)
3
AUDIO
39
AMP. 3 SP901
36 37 33 34 38 5 (R)
SPEAKER
Q001
(R)
MUTE
K1021
FIXED
AUDIO OUT (L)
IC1001
SELECT V/Y + C1/C2 K1011
S2-SW 11 FIXED
H
13 V2 IN AUDIO OUT (R)
V2 14
L
MAIN AV 1/2 9
L 5 C1 IN
C1 4
H
S1-SW 10
L
2 Y1 IN
V1/Y1 15
H 1 V1 IN (Vertical Output)
V2
INT. V V1/Y1
FOR PIP
K1001 A/V 1 IN
Q1096
VIDEO IN
Q1097
13 12 5 3 2 1 AUDIO IN (L)
H L L H L H
IC1002
SELECT CVBS
AUDIO IN (R)
PIP FOR PIP
TV/AV
11 14 10 4 9 15
CVBS PIP K1002 A/V 2 IN
PIP AV 1/2 VIDEO IN
Y/V SELECT
S1 SW
AUDIO IN (L)
ABL
DEFLECTION
H-PULSE
(Horizontal Output)
YOKE
V
AUDIO IN (R)
2
H
IC501
VERT. Y1 IN Y
AFC
OUTPUT
5 C1 IN C
ABL K1051
1 S1 SW
6/7
S1 IN AV1
H.V.
T402
HORIZ. FOCUS
OUTPUT
SCREEN
TRANS. 4 Y
HEATER
9
Q402 V +B
3
HORIZ.
OUTPUT 200V
4
D481 D482
R Q721 -R OUT
G Q711 -G OUT
Q901
B Q701 -B OUT PIX TUBE
D483
+26V
D508
D428
D429
(16V)
ANODE LEAK
(7V)
DETECT.
R428
g7jam
Device/Pin # Volts/Mode Device/Pin # Volts/Mode Device/Pin #
IC3401-19 9.1 IC8001-29 0
Q604-B
IC3401-20 0 IC8001-30 GND
IC3401-21 4.1 IC8001-31 N.C.
Q604-C
IC3401-22 4.1 IC8001-32 0.4
IC3401-23 3.7 IC8001-33 0.3 Q604-E
IC3401-24 3.9 IC8001-34 3.1
Q605-B
IC3401-25 4.1 IC8001-35 3.1
IC3401-26 4.1 IC8001-36 GND
Q605-C
IC3401-27 4.1 IC8001-37 3.0
IC3401-28 1.9 IC8001-38 0.9
Q605-E
IC3401-29 4.1 IC8001-39 2.9
IC3401-30 4.1 IC8001-40 1.2
IC3401-31 2.0 IC8001-41 1.2 Q627-B
IC3401-32 4.1 IC8001-42 GND
IC3401-33 4.1 IC8001-43 0.9 Q627-C
IC3401-34 4.1 IC8001-44 3.2
IC3401-35 0 IC8001-45 0.9 Q627-E
IC3401-36 4.1 IC8001-46 3.2
IC3401-37 4.1 IC8001-47 1.0
Q635-B
IC3401-38 4.1 IC8001-48 GND
IC3401-39 4.1 IC8001-49 1.0
Q635-C
IC3401-40 4.1 IC8001-50 GND
IC3401-41 4.1 IC8001-51 0.9
Q635-E
IC3401-42 GND IC8001-52 GND
IC3401-43 4.1
POWER ON: POWER OFF:
Q681-B
Q001-B
IC3401-44 4.1 0 0.7
IC3401-45 4.2
POWER ON: POWER OFF:
Q681-C
Q001-C
IC3401-46 GND 7.7 0
Q681-E
IC3401-47 4.1 Q001-E GND
IC3401-48 4.1
Q135-B 2.3
Q693-B
IC8001-1 GRD
Q135-C 5.2
IC8001-2 2.1
Q135-E 1.7
Q693-C
IC8001-3 1.6
Q202-B 2.7
IC8001-4 1.8
Q202-C GND
IC8001-5 1.6 Q693-E
Q202-E 3.4
IC8001-6 3.2
Q208-B 2.8
IC8001-7 3.2 Q695-B
Q208-C GND
IC8001-8 0.9
Q208-E 3.5
Q695-C
IC8001-9 1.4
Q401-B 0.3
IC8001-10 0.5 Q401-C 43.6 Q695-E
IC8001-11 GND
Q401-E GND
Q701-B
IC8001-12 3.2
Q402-B -0.1
Q701-C
IC8001-13 0.8
Q402-C 125.26
Q701-E
IC8001-14 1.4
Q402-E GND
Q711-B
IC8001-15 0.5
Q446-B 4.0
Q711-C
IC8001-16 GRD
Q446-C GND
Q711-E
IC8001-17 3.1
Q446-E 4.7
Q721-B
IC8001-18 GRD
Q486-B 9.9
Q721-C
IC8001-19 3.1
Q486-C 11.6
Q721-E
IC8001-20 N.C.
Q486-E 9.1
Q831-B
IC8001-21 0 Q490-B 5.9
Q831-C
IC8001-22 0.2
Q490-C 6.9
Q831-E
IC8001-23 0.1
Q490-E 5.2
Q1096-B
IC8001-24 0.3
POWER ON: POWER OFF: Q1096-C
Q601-B
IC8001-25 2.2
–0.3 0
Q1096-E
IC8001-26 GND
POWER ON: POWER OFF: Q1097-B
Q601-C
IC8001-27 3.1
155.0 169.6
Q1097-C
IC8001-28 N.C.
Q601-E GND Q1097-E
— 31 —
WAVEFORMS
IC101- IC101- IC101-
17 18 19
(R-Output) (G-Output) (B-Output) (Selected Video)
2.0V HORIZ 2.0V HORIZ 2.0V HORIZ 1.0V HORIZ
IC501- 2 IC501- 5 Q202-E (TP16)
(Inverting Input) (Internal Video) (Horizontal Drive)
58 VERT 0.6V VERT 1.0V HORIZ
Q402- B Q601- B T402- 9
(Power Switching) (Heater)
13V HORZ 6.0V 50KHz 28V HORIZ
Device/Pin # Volts/Mode
Volts/Mode
Q8000-B 3.9
POWER ON: POWER OFF:
–0.4 0.6 Q8000-C 4.2
Q8000-E 3.2
POWER ON: POWER OFF:
–0.3 0 Q8005-B 0.6
Q8005-C 0.3
GND
Q8005-E GND
POWER ON: POWER OFF:
Q8006-B 0.6
13.1 1.4
Q8006-C 0.2
POWER ON: POWER OFF:
Q8006-E GND
–0.4 0.6
Q8073-B 4.3
POWER ON: POWER OFF:
Q8073-C 9.0
13.0 2.0
Q8073-E 0
POWER ON: POWER OFF:
Q8076-B 3.7
11.1 7.3
Q8076-C GND
POWER ON: POWER OFF:
Q8076-E 4.4
11.6 1.0
Q8083-B 2.9
POWER ON: POWER OFF:
Q8083-C 0.2
11.9 7.3
Q8083-E 3.1
POWER ON: POWER OFF:
Q8090-B 0
4.2 1.4
Q8090-C 3.4
POWER ON: POWER OFF: Q8090-E GND
31.1 9.8
Q8093-B 1.8
POWER ON: POWER OFF: Q8093-C 2.1
4.2 1.4
Q8093-E 3.4
POWER ON: POWER OFF: Q8097-B 1.9
0.7 0
Q8097-C 2.2
Q8097-E 3.3
POWER ON: POWER OFF:
0 7.3
GND
POWER ON: POWER OFF:
0.5 6.2
POWER ON: POWER OFF:
30.9 8.9
POWER ON: POWER OFF:
0.4 5.7
POWER ON: POWER OFF:
30.9 9.6
GND
POWER ON: POWER OFF:
31.0 9.8
2.6
141.9
2.5
2.6
143.1
2.5
2.6
146.1
2.5
4.9
4.9
4.9
6.9
9.1
6.2
5.9
9.1
5.3
— 32 —
IC101-
52
Q401- B
0.7V HORZ