Shopping cart is empty
 
English Polski Spanish 
Search For a Manual
 

(e.g. AA-V20EG JVC, ZX-7 Sony )
PayPal 1000+ rating Secure, Encrypted Checkout.
 
Who's Online
There currently are 5900 guests online.
Categories
Information
Featured Product
Home >> PANASONIC >> TX28XD4F/A Service Manual
 
 0 item(s) in your cart 

PANASONIC TX28XD4F/A
Service Manual


Tweet about this product and get $1.00 of store credit for instant use!
  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of PANASONIC TX28XD4F/A Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages:

Not yet ready
You must purchase it first

Customer Reviews
There are currently no product reviews.
Other Reviews
 MX650 AKAI Service Manual by Sorin Ionita;
Excellent manual, detailed, very useful! Exactly what I needed, I'd recommend it to all who need it. Although images are scanned easily readable and explicit. A valuable tool product at a price more than modest, take it with confidence and you will not regret it!
 KD-1500 KENWOOD Service Manual by Marc LO BONO;
Clear and complete service manual. Easy now to restore my old Kenwood KD-1500. Thanks a lot.
 PS-212A SONY Service Manual by Marc LO BONO;
Thanks for this "hard to find" service manual. This Sony PS212A is a very good turntable that needed to be restored !
 T-707 SANSUI Service Manual by Victor Herrera;
Excellent quality on these manuals. Same as having the original printed manual and incredibly useful when doing a custom install like me. Keep it up on the good work.
 SH8065 TECHNICS Service Manual by Victor Herrera;
This is an excellent information source. Great quality and tons of info regarding technical service for the Technics SH8065.

Text excerpt from page 3 (click to view)
Philips Semiconductors

A linear broadband 12 W ampli�er for band IV/V TV transposers based on the BLV58
1 ABSTRACT

Application Note AN98028

A broadband linear amplifier design is presented, suitable for application in TV transposers operating in bands IV and V (470 � 860 MHz). The design is based on a single BLV58 bipolar transistor in push pull configuration. Results at the published class A bias point (25 V/3.2 A) for the BLV58 include 12 W peak sync output power at �52 dB three tone IMD level and 11 dB gain in the (470 � 860) MHz range. Po-sync level improved by 4 W at 26 V/3.8 A. 2 INTRODUCTION

For solid state TV transposers Philips introduced the BLV58, a bipolar linear push-pull power transistor designed to operate in the 470 � 860 MHz range. Narrowband intermodulation distortion level is < �45 dB and powergain >10 dB at 860 MHz. In this application note an amplifier design is to be discussed which demonstrates the broadband capabilities of a BLV58 in push-pull configuration. Special attention is paid to the broadband tuning procedure for good and reproducible linearity. Fullband performance data are presented measured with two different 3-tone systems at two bias levels. 3 GENERAL CONSIDERATIONS

UHF solid state TV transposers for service in band 4 and 5 are commonly realized using broadband amplifiers which are capable to handle both bands. The typical frequency range is 470 � 860 MHz or channel 21 to 69. Some transposers also service additional channel at the high end of band V. But these are quite rare. High powers are obtained by combining power from several lower power modules. The basic low power module consists of two push-pull amplifier combined using 3 dB quadrature hybrids. The push-pull amplifier is designed for flat gain response by allowing input mismatch which gradually improves with frequency. To have good input return loss throughout the band two of these push-pull amplifiers are combined using 3 dB quadrature hybrids. Low and flat intermodulation distortion (IMD) is required throughout the band. As linearity performance is strongly determined by the collector loading, special attention must be paid to the tuning procedure for obtaining minimum and reproducible IMD response. The class-A bias point used for this design is that published in the datasheet. However broadband performance has been evaluated at elevated bias levels within the DC safe operating area. Some means of bias temperature compensation is applied to achieve thermal stability. 4 AMPLIFIER DESCRIPTION

Figure 1 shows the schematic of the total push pull amplifier without the biasing circuitry. It utilizes mixed lumped and distributed low pass/high pass impedance matching sections for maximum bandwidth. The low pass sections consists of shunt capacitors and series transmission lines. The high pass sections consist of series capacitors and short circuited stubs. The stubs also form a part of the balance to unbalance(balun) transformers. The length of the stubs is less than 1/8 wavelength at 470 MHz. Balance is maintained by loading both the outer and inner conductors with identical stubs. The series capacitors also act as DC blocking. The board material used for this amplifier is ULTRALAM 2000 from ROGERS Corp. which has a good price/performance ratio and good mechanical stability. It is a PTFE based substrate with εr = 2.55 and 30 mils (0.76 mm) thickness. The printed-circuit board layout is shown in Figs 2 and 3 shows the component layout diagram. The list of components is given on page 7. 5 LOAD NETWORK DESIGN

The theoretical design was based on load impedance data from the datasheet. The conjugate of the broadband load impedance for one section was modelled as shown in Fig.4. R represents the load resistance to obtain good linearity, C the effective output capacitance of the transistor and L the bonding wires and package lead inductance.

1998 Mar 23

3

You might also want to buy

$4.99

TX28XD4F/A PANASONIC
Owner's Manual

Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
>
Parse Time: 0.157 - Number of Queries: 110 - Query Time: 0.04