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Service Manual

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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of JVC HRS4800U 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.

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Excellent printing quality. A complete and very usefull service manual with all details. GREAT SERVICE AT VERY LOW PRICE! A+++++++++++++++++++++++++
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 1240 TEKTRONIX Service Manual by Rob Modeste;
This manual is accurate and of high quality. It is only volume 2 of the service manual. This is schematic, parts lists, and exploded mechanical drawings. The theory of operation and the diss-assembly instructions are in volume 1. The unit can be tricky to dis-assemble portions of so the volume 1 manual can be important. The product description of the manual is accurate but it does not say anything about volume 1 and the image of the front page does clearly say Volume 2.
 34 TRIADE ORION Service Manual by Matteo Vannini;
Wellll again thank you very much fast and effective. Clear and well done for such an old TV!!!!
 AU-D101 SANSUI Service Manual by Adrian Davies;
It has all the information you will need to fix it. The main circuit diagram is only A4 but being a PDF, you can print it to any size - I did it on two sheets of A3 and it didnt lose any detail - just made it readable when pinned up above the bench. I've found the fault, just need to buy some obscure bits to get it going again! I cant fault the process, I paid for the manual in the morning and it was ready to download by lunch time.

Text excerpt from page 7 (click to view)
1.4 SERVICE POSITION In order to facilitate diagnosis and the repair of the Mechanism assembly, this unit is constructed so as to allow the Mechanism and Main board assemblies to be removed together from the Bottom chassis assembly. 1.4.1 How to take out the Mechanism and Main board assemblies (1) Remove the Top cover, Bracket, Front panel assembly and S JACK board assembly. (Do not remove the flat wire (WR3b) from CN7108 on the S JACK board assembly.) (See 1.3 DISASSEMBLY/ASSEMBLY METHOD.) (2) Lower the cassette holder, and make the preparations required in order to remove the screws from the Mechanism assembly. (Refer to the “Procedures for Lowering the Cassette holder assembly” on pages 1-3 of 1.3 DISASSEMBLY/ASSEMBLY METHOD.) (3) Remove the Roller arm assembly and Drum shield. (See Fig. D4 of 1.3 DISASSEMBLY/ASSEMBLY METHOD.) (4) Take out 2 screws A , 1 screw B , 1 screw C and 1 screw D as shown in Fig. 1-4-1.

JACK board assembly CN7108


Fig. 1-4-2 (6) Connect the power cord to the wall socket, and lift the cassette holder. (Before turning on the power make sure that there is nothing which may produce a short circuit, such as faulty soldering.) (7) When performing a diagnosis or repair of the Main board assembly with a cassette tape in place, turn on the power, insert a cassette tape, and turn over the Main board and Mechanism assemblies together. NOTES: • When carrying out diagnosis and repair of the Main board assembly in the service position, be sure to ground both the Main board and


Fig. 1-4-1 (5) Remove the Main board and Mechanism assemblies together while holding the edge of the Main board assembly. At this stage be careful of the power cord and prongs of the jacks on the back side. (See Fig. 1-4-2.)

Mechanism assemblies. If they are improperly grounded, there may be noise on the playback picture or the FDP counter display may move even when the mechanism is kept in an inoperative status.
• When performing diagnostics of the tape playback or recording condition in the “SERVICE POSITION”, enter the desired mode before turning the set upside down, and do not change the mode during diagnostics while the set is placed upside down. If you want to switch the mode, turn the set to the normal position.


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