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Service Manual

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

Description of HITACHI HTDK170E 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: English, German, French

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Text excerpt from page 16 (click to view)
There are 7812, 7805 and LM317 linear regulator ICs on the power supply to generate +5V, -5V, +12V, -12V and +3.3V for the device. On the standby mode just +12Vst and +5V supplies are generating for standby power consumption. The ES6008/18 requires 2.5V to operate. This voltage is generated from +5V.

The I/O connector is a 40-pin connector as shown in figure A.1, with pin assignments as shown in table A.1. The connector shall be keyed to prevent the possibility of installing it upside down. A key is provided by the removal of pin 20. The corresponding pin on the cable connector shall be plugged. The cable plug, not the receptacle, governs the pin locations. The way in which the receptacle is mounted on the printed circuit board affects the pin positions, and pin 1 shall remain in the same relative position. This means the pin numbers of the receptacle may not reflect the conductor number of the plug. The header receptacle is not polarized, and all the signals are relative to pin 20, which is keyed. By using the plug positions as primary, a straight cable can connect devices. As shown in figure A.1, conductor 1 on pin 1 of the plug shall be in the same relative position no matter what the receptacle numbering looks like. If receptacle numbering was followed, the cable would have to twist 180 degrees between a device with top-mounted receptacles, and a device with bottom-mounted receptacles.


20 Circuit board

1 2 Circuit board 40 Figure A.1 - 40-pin connector mounting 20 1 2


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