Its easy to identify the horizontal output transistor in any monitor. It is an amplyfying transister that drives the horizontal output transformer that drives the deflection yoke to drive the horiz trace across the crt screen. Dec 27, 2012 if you mean the vertical and horizontal transformers, then your referring to the scanning system used by older tv systems, the beam on a tv is scanned from left to right, and top to bottom, and uses scanning coils located on the neck of the tv tube, which are driven by transformers and in turn these will be driven by power transistors. Vcbo 1500v min high switching speed applications horizontal deflection output for high resolution display. Horizontal output transistors keep blowing or excessively. Connect the yellow test lead clip to the collector of the horizontal output transistor. The right test equipment to check the electronic components. In order to do this you will need to be able to identify the emitter, base, and collector leads of the transistor. The hot conducts until the start of horizontal sync and then is abruptly. Krohne optiswitch 3000 c operating instructions manual pdf. Free transistor circuits books download ebooks online textbooks. Bipolar power transistor selection guide january 2003 table of contents product page general purpose transistors horizontal deflection output transistors product page dpak d2pak sot223 ipak to126 todarlington transistors dpak ipak to126 to220 to220f to3p to3pf switching transistors dpak d2pak to92 to126 to220 to220f to3p to3pf 2.
If this number is not available, you can use exact substitute after reffering it to transistor data book and equivalents. Apr 15, 2006 it is an amplyfying transister that drives the horizontal output transformer that drives the deflection yoke to drive the horiz trace across the crt screen. Understanding the ha2500 horizontal output load test. Is there anything available to see if a particular transistor can be replaced with a different one. In a modern monitor, this is typically a to218 package, sometimes referred to as a to3p p. D datasheet pdf, pdf, pinout, equivalent, replacement, schematic, manual, data, datasheet, circuit, parts. If the transistor is a pnp, then the arrow points to the base of the transistor, otherwise it points to the output. Searching the right transistor for substitution is a skill, if you replace wrong specifications of transistor. D datasheet pdf, d data sheet, d, d power amplifier with volume control and tone control overview the an is an integrated circuit designed for 4. A horizontal output transistor to provide a switched current path to energize the output transformer or coil. A wide variety of horizontal output transistors options are available to you, there are 112 suppliers who sells horizontal output transistors on, mainly located in asia. View and download krohne optiswitch 3000 c operating instructions manual online. Will a tv turn on even if the horizontal output transistor is. Market trends and the development of horizontaldeflection output transistors.
Free transistor circuits books download ebooks online. The sixth edition of the general electric transistor manual has been completely. En2428a npn triple diffused planar silicon transistor 2sd1881 color tv horizontal deflection output applications applications package dimensions color tv horizontal diflection output. Bu406d bu406, bu407 npn power transistors these devices are high voltage, high speed transistors for horizontal deflection output stages of tvs and crts. The humble transistor q1 emitter e collector c base b transistor basics emitter to base junction is forward biased normally collector to base junction is reverse biased normally transistors are current operated devices, so. It is always the largest transistor, closest to the flyback transformer. It also the transformer that is performs the funtion of supplying eht at some 23kv besides focus volts of 5kv plus other secondary voltages. Common moderate moderate output input impedanceimpedance.
Finding transistor replacement can take you hours if you dont know the right method to do it. It can easily be said that the horizontal output transistor is the heart of a tv. Ch255 component holder for sencore z meters operator manual cm125 brochure. Electronic repair transistor cross reference replacement. Sencore tc114, tc, tc6, tc142, tc154 mighty mite tube tester setup book password removed. Understanding transistor replacement, substitution and information is very important for a electronic repairer. Making horizontal output dynamic measurements with the tva92. Voltage regulator 7800 and 7900 series specification. The common emitter amplifier configuration produces the highest current and power gain of all the three bipolar. Transistor data for 2sa, 2sb, 2sc, 2sd, 2sj and 2sk.
Improper drive to horizontal output transistor hot. If you mean the vertical and horizontal transformers, then your referring to the scanning system used by older tv systems, the beam on a tv is scanned from left to right, and top to bottom, and uses scanning coils located on the neck of the tv tube, which are driven by transformers and in turn these will be driven by power transistors. Transistor uses, transistor rules, common emitter circuit, small signal amplification, fieldeffect transistors, jfet operating regions. The horizontal output transistor is switched on and off at the horizontal frequency of 15,734 hz. A weak drive might cause the hot to turn on or more likely shut off too slowly greatly increasing heat dissipation. Dried up capacitors, open resistors or chokes, bad. Any new issue of this data book, or individual product data sheets, invalidate previous issues. Horizontal output, vertical output transistor on a tv. There are books galore on this but surely someone knows of a site that has them listed and searchable my query is a simple one i have no 2n5551 transistors on hand and i want to see if one in my box will do the job. Diodes and transistors pdf 28p this note covers the following topics. Discrete semiconductors selection guide 2010 products for general applications bene. Horizontal output transistors keep blowing or excessively hot. The most widely used circuit symbols are also shown see fig. You can always remember that the arrow points at the n material.
Optiswitch 5200c measuring instruments pdf manual download. Semiconductor devices, or toshiba semiconductor reliability handbook etc. Sometimes, the horizontal deflection is designed based on the quirks of a particular transistor. These three connections are the base, emitter, and collector of the horizontal output transistor or the gate, source and drain if a fet is used. Jun 06, 2008 the squeal you heard was the high voltage trying to come up for the picture tube. Higher voltage, ampere and wattage will cause complete destruction to the transistor because it is not easy to find an exact replacement for horizontal. Replacement transistor not correct or inferior cross reference. Horizontaldeflection output transistors west florida components. If you are looking for replacement of signal transistor, a higher voltage, amp,and watt will do the job but not in the case if you want to find a replacement for horizontal output transistor.
Transistor circuits for a wide range of applications are discussed in this book, along with many different diode and transistor types. A click on a product type takes you to the corresponding product information page on the nxp website. For a better understanding, refer to the load test block. Basic semiconductor physics, diodes, the nonlinear diode model, load line analysis, large signal diode models, offset diode model, transistors, large signal bjt model, load line analysis, small signal model and transistor amplification. Connect the black test lead clip to the horizontal output stage ground typically at the h. Horizontal output transistor problems free download as pdf file. The top countries of supplier is china, from which the percentage of horizontal output transistors supply is 100% respectively. This dvd contents more than 210 original sencore service manuals, schematics, tech tips and owner manuals for servicing a lots of sencore products. This type of configuration is the most commonly used circuit for transistor based amplifiers and which represents the normal method of bipolar transistor connection. Horizontal output, vertical output transistor on a tv board.
Inchange semiconductor isc product specification isc silicon npn power transistor 2sc4542 description high breakdown voltage. Analyzing the horizontal output pulse with the waveform. Optiswitch 3000 c measuring instruments pdf manual download. Lets take a careful look at nine of the key functions. Transistor basics emitter to base junction is forward biased normally collector to base junction is reverse biased normally transistors are current operated devices, so kcl should be applied first. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34.
In a modern monitor, this is typically a to218 package, sometimes referred to as a to3p p for plastic package as well. Rca power devices data book 1978 rca corporation 1978 acrobat 7 pdf 40. Understanding transistor replacement, substitution and. A drive signal to this horizontal output transistor at the proper frequency and duty cycle to switch it on and off properly. With out knowing what and ware your are using it, you should choose a similar part. New transistor not mounted properly to heat sink probably needs mica washer and heat sink compound. The rca transistors and semiconductor diodes brochure from 1957 contains an introduction on semiconductor physics along with detailed specifications on germanium pnp transistors and a few semiconductor diodes 1n34a, 1n38a, 1n54a, and 1n58a, dimensional outlines, an interchangeability directory, and example.