REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

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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..............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, 2 February 2019

SAMSUNG MAX A55U – THREE CD CHANGER – POWER BOARD, AMPLIFIER SECTION CIRCUIT DIAGRAM, MICOM INITIALIZATION

Samsung MAX A55U – three CD changer – Power board, amplifier section circuit diagram, micom initialization

Samsung MAX-A55U, MAX-A55U/XAH Three-CD Changer  MINI-Compact System  SMPS, Power amp schematic, system update 
Output Power
AMP TYPE: ANALOG AMP
OUTPUT: 90W x 2
TOTAL: 180W (PMPO 3000W)
Main System MICOM control Function IC (R2S15904), Tuner pack, CD deck.
It gets all information from R2S15904. They have a communication among the with HOST ↔ SLAVE interface.
And Main System MICOM gets the information from User’s remote control. So whenever it gets the information, it displays it on the VFD.
* The CD Deck transfer the audio data to R2S15904.
* AUX Jack and Tuner pack are each connected to R2S15904. Data from AUX and tuner transfer to R2S15904.
Then, after processing, the data will send the date to AMP IC.
SMPS (Power board) schematic
MAX55U SMPS
Cases of the SMPS Protection.
1. If there is over current at the AMP IC. (Speaker Wire Short)
2. If temperature of the Amp IC is over 150°C.
3. There is no power input at GATE DRIVER
Click on the schematics to zoom in
MAX A55U SMPS
Power amplifier schematic
MICOM Initialization & Update
MICOM initial
In STANDBY condition, press ‘STOP’ button of Main Unit 5 seconds more, time display as ‘--:--’.
Then Initialization complete. MICOM update
MICOM update process has changed. Need new MICOM update jig (SANYO TCB87) and debugging program installed PC.
1. Turn on PC and connect TCB87 to PC by USB.
2. Connect TCB87 to SET.
(In MAIN PCB (Location No.: UCW0), Connecting 6 pin cable wire to Update connector.)
3. Turn on SET. (or power cord in)
4. Load update HEX file in the PC. (by SANYO MICOM debugging program)
5. Update.
6. Quit SANYO MICOM debugging program.
7. Turn off SET.
8. Disconnect 6 pin wires from SET.
9. Done. (Update is available only OTP/Flash type MICOM.)
Posted By: FRANK at 08:08
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