Block Diagram; Voltage Charts; Waveforms; Schematic Diagrams - Sanyo AVM-2751S Service Manual

MODEL AVM-2751S Chassis No. G7V-2751S0
MODEL DS27510 Chassis No. 27510-00

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
— 25 —

BLOCK DIAGRAM

ANT
A101
IF
UHF/VHF TUNER
WITH PLL
AGC
& BAND SW
IC802
EEPROM
A1901
RC PRE-AMP
SW1901-1906
CONTROL KEYS
DIODES
A K
A K
A K
A K PS601
L901
POSISTOR
DEGAUSING
COIL
K
A
F601
AC
A AC120V
K
FUSE
60Hz
INFRARED EMITTING
C601
A....ANODE
K....CATHODE
4A 125V
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
IC101-43 GND
POWER ON: POWER OFF:
D612-1
31.9 10.9
IC101-44 2.2
IC101-45 3.7
POWER ON: POWER OFF:
D612-2
31.0 9.8 IC101-46 2.0
IC101-47 3.0
POWER ON: POWER OFF:
D612-3
–.3 0.6 IC101-48 0
IC101-49 2.5
POWER ON: POWER OFF:
D612-4
– 10% IC101-50 GND
13.3 1.4
IC101-51 GND
IC002-1 7.7
IC101-52 2.8
IC002-2 11.0
IC101-53 5.2
IC002-3 7.7
IC101-54 2.7
IC002-4 GND
IC101-55 2.7
IC002-5 NC
0% IC101-56 2.3
IC002-6 1.4
IC101-57 GND
– 20%
IC002-7 1.4
IC101-58 3.6
IC002-8 GND
IC101-59 4.4
IC101-1 GND
IC101-60 4.4
IC101-2 GND
IC101-61 GND
IC101-3 GND
IC101-62 GND
IC101-4 GND
IC101-63 GND
IC101-5 GND
IC101-64 GND
IC101-6 5.1
IC101-65 2.5
IC101-7 2.0
IC101-66 2.3
IC101-8 2.6
IC101-67 1.9
IC101-9 3.6
IC101-68 2.5
IC101-10 3.7
IC101-69 3.2
IC101-11 4.0
IC101-70 GND
IC101-12 1.5
IC101-71 GND
IC101-13 1.5
IC101-72 GND
IC101-14 1.5
IC101-73 2.3
IC101-15 0
IC101-74 0
IC101-16 8.3
IC101-75 2.3
IC101-17 2.5
IC101-76 2.7
IC101-18 2.5
IC101-77 2.3
IC101-19 2.5
IC101-78 2.9
IC101-20 2.25
IC101-79 2.9
IC101-21 GND
IC101-80 GND
IC101-22 GND
IC501-1 GND
IC101-23 GND
IC501-2 14.4
IC101-24 GND
IC501-3 27.1
IC101-25 2.0
IC501-4 3.8
IC101-26 2.4
IC501-5 3.8
IC101-27 2.6
IC501-6 26.2
IC101-28 5,3
IC501-7 2.8
IC101-29 2.8
IC101-30 0.6 POWER ON:
IC601-1
129.2
IC101-31 GND
IC101-32 4.9 POWER ON:
IC601-2
IC101-33 1.0 31.1
IC101-34 1.8 IC601-3 GND
IC101-35 4.8 IC681-1
POWER ON:
IC101-36 3.9 (IN) 11.6
IC101-37 4.0 IC681-2 GND
IC101-38 4.7 IC681-3
POWER ON:
IC101-39 GND 5.0
(OUT)
IC101-40 0
IC101-41 GND
IC101-42 GND
— 26 —
CAUTION
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
4A 125V
FUSIBLE DE RECHANGE DE MEME TYPE 4A, 125V.
SDL
SCL
EXT. VIDEO
INT. VIDEO
H-S
V-S
RF AGC MUTE
1 2
28 38
BUS SCL
X141
34
SAW
BUS SDA
32 FILTER
RF AGC 77
6 IIC SCL
33
MAIN AV 1/2
5 IIC SDA ACL
5
31
EXT. VIDEO
INT. VIDEO
Q208
RC IN
BEAM
10
VOLTAGE
DETECT. CAP
VIDEO
KEY IN ABL-IN
OUT
9 30
C809 IC801
X IN
CPU
19
WITH
CAPTION
C808
X OUT
DECODER
20
X 801
Y CV IN
17
OSD (R)
42
OSD (G)
+12V
41
OSD (B)
40
OSD (BLK)
Q658 39
RESET
RELAY Q831
25
DRIVER RESET
AFT S-CURVE
29
RL601 POWER FAIL
RELAY 3
POWER
27
ON/OFF
5V
IC681
T601 ALWAYS
5V REG.
CONVERTER B9
D694
LF601 TRANS.
D621 +16V
Q681
LINE
+130V 12V SW
FILTER
12V
D624 DRIVE
D627
Q601 B4
SW.
D625
IC601
+12V
D601-D604 Q486
9V
POWER Q635
FULL WAVE Q604 9V REG.
D612 REG. OVERLOAD
RECTIFIER OSC Q627
PROTECT.
PHOTO
12V SW.
COUPLER
5V
Q498
Q605
STANDBY MODE 5V REG. B6
ERR. Q693,
ALWAYS +5V
Q695
AMP.
CONTROL
Device/Pin # Volts/Mode Device/Pin # Volts/Mode
IC1002-1 5.2
IC801-1 4.0
IC1002-2 5.2
IC801-2 3.9
IC801-3 4.9 IC1002-3 3.9
IC801-4 9.1 IC1002-4 3.9
IC1002-5 3.9
IC801-5 0
IC1002-6 GND
IC801-6 0
IC1002-7 GND
IC801-7 0
IC1002-8 GND
IC801-8 0.3
IC801-9 0 IC1002-9 0
IC801-10 4.9 IC1002-10 0
IC1002-11 0
IC801-11 0
IC1002-12 6.0
IC801-12 4.8
IC1002-13 5.2
IC801-13 4.9
IC801-14 4.9 IC1002-14 6.0
IC801-15 1.9 IC1002-15 5.2
IC1002-16 9.1
IC801-16 0.2
IC3401-1 4.1
IC801-17 2.1
IC3401-2 4.1
IC801-18 GND
IC3401-3 4.1
IC801-19 2.2
IC801-20 2.0 IC3401-4 4.1
IC801-21 GND IC3401-5 3.6
IC3401-6 3.7
IC801-22 4.9
IC3401-7 GND
IC801-23 0.2
IC3401-8 4.1
IC801-24 0.2
IC801-25 4.8 IC3401-9 4.1
IC801-26 0.3 IC3401-10 4.1
IC3401-11 4.1
POWER ON: POWER OFF:
IC801-27
IC3401-12 4.9
4.9 0
IC3401-13 4.1
IC801-28 2.3
IC3401-14 1.3
IC801-29 2.6
IC3401-15 1.3
IC801-30 0
IC3401-16 0
IC801-31 4.9
IC3401-17 GND
IC801-32 3.6
IC3401-18 3.2
IC801-33 4.9
IC3401-19 9.1
IC801-34 3.7
IC3401-20 0
IC801-35 4.8
IC3401-21 4.1
IC801-36 4.9
IC3401-22 4.1
IC801-37 4.9
IC3401-23 3.7
IC801-38
0
IC3401-24 3.9
IC801-39 0
IC3401-25 4.1
IC801-40 0
IC3401-26 4.1
IC801-41 0
IC3401-27 4.1
IC801-42 0
IC3401-28 1.9
IC802-1 GND
IC3401-29 4.1
IC802-2 GND
IC3401-30 4.1
IC802-3 GND
POWER OFF:
IC3401-31 2.0
92.5 IC802-4 GND
IC3401-32 4.1
IC802-5 4.9
POWER OFF:
IC3401-33 4.1
9.8 IC802-6 4.9
IC3401-34 4.1
IC802-7 GND
IC3401-35 0
IC802-8 4.9
POWER OFF:
IC3401-36 4.1
7.3
IC3401-37 4.1
IC3401-38 4.1
POWER OFF:
IC3401-39 4.1
5.0
IC3401-40 4.1
IC3401-41 4.1
IC3401-42 GND
4
5
IC3401 3
L
MTS DECODER 39
6
R
13 36 37 33 34 38
Q001 Q005
MUTE
+16V
V1 IN
V2 IN
Q135 Q202
13 12 5 3 2 1
BUFFER BUFFER
IC101
H L L H L H
SIGNAL PROCESS IC1002
SELECT
SDA 9
AV 1/2
BUS
SCL 10 11 14 9 4 10 15
INTERFACE
4.5MHz
MAIN AV1/2 Y
L164
78/79 SOUND
FM 75
X161
TRAP EXT VIDEO
DET.
56 VIDEO
VIDEO
11
DET.
ABL
Y 52
36 V-S
VIDEO H-PULSE DEFLECTION
C 54
SW. 37 H-S V YOKE
33 2
V
49 H
SYNC 26 5 IC501
SEP. VERT.
AFC
OUTPUT
5
H
ABL
10 1
HORIZ. 6/7
H.V.
DRIVER T402
SIDE HORIZ. FOCUS
T401
DELAY PCC OUTPUT
SCREEN
H-DRIVE
LINE TRANS. 11
TRANS.
HEATER
9
Q401 Q402 V +B
BLACK 30
3
HORIZ. HORIZ.
STRETCH
LOW +B
DRIVE OUTPUT
8
SHARP
D482
BPA
40 HOLD DOWN HOLD DOWN
DETECT.
COLOR
CONT
DEMOD
BRITE Q722 R Q721 -R OUT
12 17
RGB Q712 G Q711 -G OUT
13 18
OUT
OSD
14
19
SW. Q900
15 Q702 B Q701 -B OUT PIX TUBE
RESET
8
35 5V
B9
D483
+26V
D428
D801 D429
(16V)
ANODE LEAK
(7V)
DETECT.
R428
NOTE: Waveforms were taken with color bar signal and the controls adjusted for normal picture.
Device/Pin # Volts/Mode
Device/Pin # Volts/Mode
IC3401-43 4.1
POWER ON: POWER OFF:
Q635-B
IC3401-44 4.1 4.2 1.4
IC3401-45 4.2
POWER ON: POWER OFF:
Q635-C
IC3401-46 GND 31.1 9.8
IC3401-47 4.1
POWER ON: POWER OFF:
Q635-E
IC3401-48 4.1
4.2 1.4
POWER ON: POWER OFF:
POWER ON: POWER OFF:
Q001-B
Q681-B
0 0.7
0.7 0
POWER ON: POWER OFF:
POWER ON: POWER OFF:
Q001-C
Q681-C
7.7 0
0 7.3
Q001-E GND
Q681-E GND
Q005-B 10.3
POWER ON: POWER OFF:
Q693-B
Q005-C 11.0
0.5 6.2
Q005-E 11.0
POWER ON: POWER OFF:
Q693-C
Q135-B 2.3
30.9 8.9
Q135-C 5.2
POWER ON: POWER OFF:
Q135-E 1.7 Q693-E
0.4 5.7
Q202-B 2.7
POWER ON: POWER OFF:
Q202-C GND Q695-B
30.9 9.6
Q202-E 3.4
Q695-C GND
Q208-B 2.8
POWER ON: POWER OFF:
Q208-C GND
Q695-E
31.0 9.8
Q208-E 3.5
Q701-B 12.5
Q401-B 0.3
Q701-C 169.8
Q401-C 43.6
Q701-E 11.9
Q401-E GND
Q711-B 12.5
Q402-B -0.1
Q711-C 166.5
Q402-C 125.26
(Horizontal Output)
Q711-E 12.0
Q402-E GND
Q721-B 12.5
Q486-B 9.9
Q721-C 167.4
Q486-C 11.6
Q721-E 12.0
Q486-E 9.1
Q831-B 4.9
Q490-B 5.9
Q831-C 4.9
Q490-C 6.9
Q831-E 4.9
Q490-E 5.2
POWER ON: POWER OFF:
Q601-B
–0.3 0
POWER ON: POWER OFF:
Q601-C
155.0 169.6
Q601-E GND
POWER ON: POWER OFF:
Q604-B
–0.4 0.6
POWER ON: POWER OFF:
Q604-C
–0.3 0
Q604-E GND
POWER ON: POWER OFF:
Q605-B
13.1 1.4
POWER ON: POWER OFF:
Q605-C
–0.4 0.6
POWER ON: POWER OFF:
Q605-E
13.0 2.0
POWER ON: POWER OFF:
Q627-B
11.1 7.3
POWER ON: POWER OFF:
Q627-C
11.6 1.0
POWER ON: POWER OFF:
Q627-E
11.9 7.3
— 27 —
1 SP901
L 1
(L)
SPEAKER
R 3
IC002 (L)
AUDIO
SP902
AMP. 3
2
(R) SPEAKER
(R)
AUDIO OUT (R)
AUDIO OUT (L)
K1002
A/V 1 IN
VIDEO IN
AUDIO IN (L)
AUDIO IN (R)
A/V 2 IN
VIDEO IN
AUDIO IN (L)
AUDIO IN (R)
K1011
g7vcm

WAVEFORMS

IC101- IC101- IC101-
17 18 19
(R-Output) (G-Output) (B-Output) (Selected Video)
2.0V HORIZ
2.0V HORIZ 2.0V HORIZ
IC501- 2 IC501- 5 Q202-E (TP16)
(Vertical Output) (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 28V HORIZ
2.5V 50KHz
— 28 —
IC101-
52
1.0V HORIZ
Q401- B
0.7V HORZ