Manual De Servicio De Tv

Service Manual
MT1191V 19” Color Television

THIS SERVICE MANUAL IS FOR MT1191V SUFFIX A , B , C, D AND E CRT USAGE
SUFFIX A V451
5721-015ST51N (51GGD95X) 4993-118

SUFFIX B
5721-51CN020T (510UEB22DY) 4993-060

SUFFIX C
5721-028TT48N (A48LRH93X (W)) 4993-122

SUFFIX D
5721-029NT48N (A48LSD095X) 4993-119

SUFFIX E
5721-031ZT48N (A48LGS30X) 4993-123

DY501

FEATURES wOn-screen graphics guide you through setup features and operations w Automatic programming of channels allows easy selection of stations available in your viewing w w w w w w w
area Sleep timer programs the TV to turn itself off at a preset time One day timer programs the TV to come on once at a preset time Weekly timer programs the TV to come on at a preset time every day 26 button infrared remotecontrol allows remote operation VHF/UHF/CATV tuning allows reception of standard broadcasts or cable TV channels Closed caption decoder displays captions or half-screen text V-Block function

SPECIFICATIONS
AC Power Input: AC Power Consumption: Chassis Construction: Picture Tube: Speaker: Tuner: Remote Control: 120V, 60Hz 98Watts IC Solid State 19” ( measured diagonally ) 3.5 x 2 in (90 x 50 mm)Oval, 8 ohms 181 Channel, Freq. Synthesized Infrared, Direct Access 26 Key, 2 “AA” batteries

Receiving Channels: VHF UHF CATV Mid Band Super Band Hyper Band Ultra Band Sub Mid Band Cabinet: Antenna Input Impedance

2 - 13 14 - 69 14 - 22 23 - 36 37 - 65 66 - 94, 100 - 125 1, 95 - 99 Monitor Style 75 ohm (VHF/UHF) Coaxial Input

CAUTION:TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TOWIDE SLOT, FULLY INSERT.

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IMPORTANT SERVICE SAFETY INFORMATION
Operation of receiver outside of cabinet or with back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. Exercise care when servicing this chassis with power applied. Many B plus and high voltageRF terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain connecting ground lead connections between chassis, escutcheon, picture tube dag and tuner cluster when operating chassis. These receivers have a “Polarized” AC line cord. The AC plug is designed to fit into standard AC outlets in one direction only. The wide blade connectsto the “ground side” and the narrow blade connects to the “hot side” of the AC line. This assures that the TV receiver is properly grounded to the house wiring. If an extension cord must be used, make sure it is of the “polarized” type. When it is necessary to make measurements or tests with AC power applied to the receiver chassis, an Isolation Transformer must be used as a safety precaution andto prevent possible damage to transistors. The Isolation Transformer should be connected between the TV line cord plug and the AC power outlet. Certain HV failures can increase X-ray radiation. Receivers should not be operated with HV levels exceeding the specified rating for their chassis type. The maximum operating HV specified for the chassis used in these receivers is 25 KV ± 1.0KV at zerobeam current with a line voltage of 120V AC. Higher voltage may also increase possibility of failure in HV supply. It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the receiver that could cause a rise in high voltage, or operating supply voltages. No changes should be made to the original design of the receiver. Componentsshown in the shaded areas on the schematic diagram or identified by the safety mark in the replacement parts list should be replaced only with exact Factory recommended replacement parts. The use of unauthorized substitute parts may create shock, fire, X-radiation or other hazard. To determine the presence of high voltage, use an accurate high impedance HV meter connected between second anode...