MODEL DS20930 Chassis No. 20930-00VOLTAGE CHARTS
Note: Voltages were measured with color-bar signal and controls set for normal picture.
SCHEMATIC DIAGRAMS
NOTES ON SCHEMATIC DIAGRAMDevice/Pin #Volts/ModeDevice/Pin #Volts/ModeDevice/Pin #Volts/ModeDevice/Pin #Volts/ModeDevice/Pin #Volts/Mode
1. All resistance values in ohms K=1,000 M=1,000,000.
D612-1POWE ON: POWER OFFIC101-453.6IC801-11GNDIC3401-14.1Q202-B2.3
2. Unless otherwise noted on schematic, all capacitor values less than 1 are expressed in ?F (Micro Farad), and the
30.010.5IC101-462.1IC801-124.8IC3401-24.1Q202-CGND
values more than 1 are in pF.
D612-2POWE ON: POWER OFFIC101-473.1IC801-13GNDIC3401-34.1Q202-E3.0
3. Unless otherwise noted on schematic, voltage reading taken with VOM from point indicated to chassis ground.
29.09.4IC101-48GNDIC801-144.9IC3401-44.1Q208-B2.5
Voltage reading taken using color bar-signal on VHF channel 5, all controls at normal. Line voltage at 220 volts. IC3401-53.6
D612-3POWE ON: POWER OFFIC101-492.5IC801-151.9Q208-CGND
Some voltages may vary with signal strength.0.70.4IC3401-63.7
IC101-50GNDIC801-160.2Q208-E3.1
4. Waveforms were taken with color-bar signal and controls set for normal picture. Waveforms marked with an = mayD612-4POWE ON: POWER OFFIC101-51GNDIC801-172.1IC3401-7GNDQ401-B0.3
vary with signal strength.16.01.7IC101-522.6IC801-18GNDIC3401-84.1Q401-C39.4
IC3401-94.1
5. Symbolindicates a fusible resistor, which protects the circuit from possible short circuits.IC001-16.5IC101-535.1IC801-192.2Q401-EGND
IC001-215.2IC101-542.9IC801-202.0IC3401-104.1Q402-B3.2
IC001-36.3IC101-552.6IC801-21GNDIC3401-114.1Q402-C132.4
SERVICE NOTES:IC001-4GNDIC101-562.5IC3401-124.9
IC801-224.9Q402-E-0.2
1. When replacing parts on circuit boards, clamp the lead wires to terminals before soldering.IC001-5N.C.IC101-57GNDIC3401-134.1
IC801-23GNDQ486-B9.9
2. When replacing high wattage resistors on circuit board, keep the resistor body 10 mm (3/8?) from circuit board.IC001-61.4IC101-583.6IC3401-141.3
IC801-24GNDQ486-C11.6
IC3401-151.3
3. Keep wires away from high voltage and high temperature components.IC001-71.4IC101-594.4
IC801-254.8Q486-E9.2
IC001-8GNDIC101-604.4IC3401-160
IC801-260.3Q490-B5.9
IC101-1GNDIC101-61GNDIC3401-17GND
IC801-27POWE ON: POWER OFFIC3401-183.2Q490-C7.3
IC101-2GNDIC101-62GND
PRODUCT SAFETY NOTICE4.90IC3401-199.1Q490-E5.2
IC101-3GNDIC101-63GND
THE COMPONENTS DESIGNATED BY A STAR ( ) ON THIS SCHEMATIC DIAGRAM DESIGNATE COMPONENTSIC801-283.9IC3401-200POWER ON:POWER OFF:
IC101-4GNDIC101-64GNDQ601-G
WHOSE VALUES ARE OF SPECIAL SIGNIFICANCE TO PRODUCT SAFETY. SHOULD ANY COMPONENT IC801-292.6IC3401-214.10.10
IC101-5GNDIC101-652.4
DESIGNATED BY A STAR NEED TO BE REPLACED, USE ONLY THE PART DESIGNATED IN THE PARTS LIST. DOIC101-65.1IC101-662.2IC801-300IC3401-224.1Q601-DPOWER ON:POWER OFF:
NOT DEVIATE FROM THE RESISTANCE, WATTAGE AND VOLTAGE RATINGS SHOWN.IC101-72.1IC101-672.2IC801-314.9IC3401-233.7163.5170.0
IC101-82.7IC101-680IC801-323.6IC3401-243.9POWER ON:POWER OFF:
Q601-S
IC101-93.8IC101-693.2IC801-334.9IC3401-254.15.60.5
X-RADIATION WARNING NOTEIC101-103.6IC101-70GNDIC801-343.7IC3401-264.1POWER ON:POWER OFF:
Q611-B
THIS TV CONTAINS CRITICAL PARTS TO PROTECT AGAINST X-RADIATION. NOMINAL 2ND ANODE VOLTAGE ISIC101-114.3IC101-71GNDIC801-354.8IC3401-274.14.60.8
26.5KV AT ZERO BEAM CURRENT AT 120 VOLTS AC LINE, AND MUST NOT EXCEED 28.0KV UNDER ANYIC101-121.5IC101-72GNDIC801-364.9IC3401-281.9POWER ON:POWER OFF:
Q611-C
OPERATING CONDITION. SEE HIGH VOLTAGE CHECK ON PAGE 8. IC101-131.5IC101-732.3IC801-374.9IC3401-294.115.71.7
IC101-141.4IC101-74GNDIC801-384.8IC3401-304.1POWER ON:POWER OFF:
IC101-150.2IC101-752.2IC801-390.2IC3401-312.0Q611-E5.70.4
IC101-168.2IC3401-324.1
INTEGRATED CIRCUITSPHOTO COUPLERSTRANSISTORSDIODESIC101-762.6IC801-400POWER ON:POWER OFF:
IC101-172.5IC101-772.2IC34101-334.1Q612-B
IC801-4105.40.8
IC3401-344.1
TOP VIEWTOP VIEWIC101-182.2IC101-782.9IC801-420Q612-CGND
AKIC3401-350
IC101-192.4IC101-792.9
IC802-1GNDPOWER ON:POWER OFF:
AKIC3401-364.1Q612-E
IC101-20GNDIC101-80GND
IC802-2GND5.70.4
IC3401-374.1
BBBIC101-21GNDIC501-12.5
CECBBIC802-3GNDPOWER ON:POWER OFF:
MARK11ECEEECCIC101-22GNDIC3401-384.1Q613-B
1AKIC501-226.2IC802-4GND0.20.1
IC3401-394.1
COUNT TERMINALS IN AKIC101-23GNDIC501-32.4IC802-54.9POWER ON:POWER OFF:
ARROW DIRECTIONIC101-24GNDIC3401-404.1Q613-C
IC501-4GND
IC802-64.95.40.9
KIC101-25N.C.IC3401-414.1
IC501-512.8
SIDE VIEWAIC101-262.1IC802-7GNDIC3401-42GNDQ613-EGND
IC501-626.6
CIC802-85.0POWER ON:POWER OFF:
BBBEE CCEEKAIC101-272.6IC501-72.5IC3401-434.1Q627-B
BCIC1081-12.512.78.0
B ... BASE INFRARED EMITTINGIC101-285.3IC601-1130.0IC3401-444.1
IC1081-22.9
POWER ON:POWER OFF:
1A....ANODE C ... COLLECTOR IC101-292.7IC601-229.2IC3401-454.2Q627-C
11E ... EMITTERIC101-300.4IC1081-32.5IC3401-46GND13.20
K....CATHODE
IC601-3GNDIC1081-43.0
IC101-31GNDIC3401-474.1POWER ON:POWER OFF:
CHIP TRANSISTORSCHIP RESISTORSIC681-1 13.4IC1081-52.5Q627-E
IC101-32N.C.13.38.1
IC3401-484.1
TOP VIEWTOP VIEWIC101-331.0IC681-2GNDIC1081-6GNDPOWER ON:POWER OFF:
CB ... BASE 12 x 10 = 12K ohm3IC681-3 5.0IC1081-7GNDQ001-BPOWER ON:POWER OFF:Q635-B
IC101-341.84.01.3
1C ... COLLECTOR 0.70
123IC801-14.0IC1081-8GND
12 332OUT E ... EMITTERIC101-35N.C.POWER ON:POWER OFF:POWER ON:POWER OFF:
11GND (3)IC1081-90Q635-C
IC801-23.9Q001-C
IN (2)IC101-365.006.329.09.0
(1)BEIC1081-100
IC101-374.3IC801-34.9POWER ON:POWER OFF:
IC101-384.7IC801-40IC1081-110Q001-EGNDQ635-E
CAPACITOR AND RESISTOR CODE CHARTQ005-B15.04.01.3
IC1081-122.9
IC101-39GNDIC801-50POWER ON:POWER OFF:
IC1081-132.5Q005-C15.7Q681-B
CAPACITOR (Example)IC101-400IC801-60.30.70
IC1081-142.9Q005-E15.8
IC101-41GNDIC801-70
POWER ON:POWER OFF:
IC1081-152.9Q135-B2.7Q681-C
IC101-42GNDIC801-80
500 C K 1500 B D ........................... ?0.5pFIC1081-169.3Q135-C5.208.1
IC101-43GNDIC801-90
Q681-EGND
T ............................ +50% -10%Q135-E2.0
IC101-442.3IC801-104.9
J ............................ ?5%
K ........................... ?10%
M ........................... ?20%
N ........................... ?30%Device/Pin #Volts/ModeWAVEFORMS
CharacteristicsP ........................... +100% -0%
POWER ON:POWER OFF:Note: Voltages were measured with color-bar signal and controls set for normal picture.
Q693-B
Value codeZ ........................... +80% -20%0.66.7
Tolerance codeC ........................... ?0.25pFPOWER ON:POWER OFF:
Q693-CIC101 pin-17 IC101 pin-18 IC101 pin-19 IC101 pin-52
28.97.8
Material codeC ........................... Ceramic(R-Output)(G-Output)(B-Output)(Video Input)
POWER ON:POWER OFF:
Voltage ratingE ........................... ElectrolyticQ693-E
2.66.1
F ........................... Polyester
POWER ON:POWER OFF:
N ........................... PolypropyleneQ695-B
28.98.8
T ............................ TantalumQ695-CGND
K ........................... CeramicPOWER ON:POWER OFF:
Q695-E
3.4Vp-p Horiz.3.4Vp-p Horiz.3.4Vp-p Horiz.1.0Vp-p Horiz.
H ........................... MT-Composite28.99.2
Q701-B2.4
P ........................... NP. Electrolytic
Q701-C145.5
M ........................... MT-Polypropylene
Q701-E2.3
IC501 pin-5 IC501 pin-1 Q202-E (TP16) Q401-B
Q711-B2.5
(Vertical Output)(Inverting Input)(Inverting Video)(Horizontal Drive)
Q711-C146.6
Q711-E2.3
RESISTOR (Example)Q721-B2.5
Q721-C140.2
6 Y K 4.7 D ........................... ?0.5%Q721-E2.4
Q831-B4.5
F ........................... ?1%
Q831-C5.150.4Vp-p Vert.0.6Vp-p Vert.1.0Vp-p Horiz.1.0Vp-p Horiz.
G ........................... ?2%
Q831-E5.1
J ............................ ?5%
Q1071-B2.9
Value codeK ........................... ?10%Q1071-CGND
Tolerance codeM ........................... ?20%Q1071-E3.6Q402-B Q601-G T402 pin-9
(Horizontal Output)(Power Switching)(Heater)
Material codeF ............................ Fusible
Wattage ratingN ........................... Metalized Carbon
S ........................... Oxide Metalized
Y ........................... Wire Wound
C ........................... Solid
D ........................... Carbon Film
18.2Vp-p Horiz.15Vp-p 50KHz29.6Vp-p Horiz.
W .......................... Wire Wound |
ACEC
