Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday 6 April 2019

HARMAN/KARDON DVD 50 – CIRCUIT DIAGRAM – DISASSEMBLY - 5 DISC DVD CHANGER

Harman/kardon DVD 50 – Circuit Diagram – Disassembly - 5 Disc DVD Changer

Applicable Discs: 5-inch (12cm) or 3-inch (8cm) DVD-Movie, CD, Video CD, MP3-CD, HDCD, CD-R or CD-RW discs.

Region 1 DVD-Movie discs
DVD: Single/Single Layer, Single Side/Dual Layer, Dual Side/Dual Layer
Linear PCM, Dolby Digital or DTS Audio
Video Signal System: NTSC
Composite Video Output: 1Vp-p/75 Ohms, sync, negative polarity
S-Video: Y/Liminace: 1Vp-p/75 Ohms, sync, negative polarity
C/Chrominance: 0.286Vp-p
Component Video Output: Y: 1Vp-p/75 Ohms, sync, negative polarity
Pr: 0.7Vp-p/75 Ohms
Pb: 0.7Vp-p/75 Ohms
Progressive Scan Output: Y: 1Vp-p/75 Ohms, sync, negative polarity
Pr: 0.7Vp-p/75 Ohms
Pb: 0.7Vp-p/75 Ohms
Analog Audio Output: HDCD: 2.0V RMS +/– 0.2V
Others: 1.0Vp-p RMS +/– 0.2V
Coaxial Digital Audio Output: 0.5Vp-p/75 Ohms
Frequency Response: 4Hz – 22kHz +/– 0.5dB (48kHz sampling)

AC Power: 100 – 240VAC 50/60Hz (Refer to back of the set.)
Power Consumption: 18 Watts

DISASSEMBLY

Tray Door
1.Eject the disc tray.
2.Lift up the tray door in the direction of the arrow.

Front Panel
1. Eject the disc tray. (See Fig. 2-2)
2. Remove the tray door. (See Fig. 2-2)
3. Pull the front panel toward you while pressing
5 stoppers to disengage, and remove the front panel.

CIRCUIT BOARD DISASSEMBLY

[Before removing the main circuit board, be sure to shortcircuit the laserdiode output land. After replacing the main circuit board, open the land after inserting the flexible connector.]

Disassemble Main circuit board, Jack circuit board, Power circuit board and MD Ass'y DPM1.

1. Remove the top case.

2. Remove 10 screws (B).

3. Disassemble Main circuit board and Jack circuit board from Bracket Main.

4. Unscrew 3 screws(C) at Bracket Main.

5. Disassemble Bracket Main from Main chassis.

6. Unscrew 4 screws(D) at MD Ass'y DPM1.

7. Turn the portion the direction of arrow to move the Base Assembly Tray in front of you.

8. Release the other 3 screws(E).

9. Disassemble MD Ass'y DPM1 from Main chassis.

10. Unscrew 4 screws(F) at Power circuit.

11. Disassemble power circuit board from Main chassis.