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 !

Tuesday, 5 February 2019

LG XA66 – CIRCUIT DIAGRAM - VOLTAGE CHART AND SOFTWARE UPDATE PROCEDURE - MICRO HI-FI SYSTEM

LG XA66 – Circuit diagram - voltage chart and Software update procedure - Micro Hi-Fi system

LG XA66 (XA66, XAS66F) MICRO Hi-Fi SYSTEM – schematic – voltage chart
 AMPLIFIER
Output Power 30 W + 30 W
T.H.D 0.5 %
Frequency Response 50 Hz ~ 20 kHz
SPEAKERS
Type 2 Way 2 Speaker
impedance 6 Ω
Rated Input Power 30 W
Max. Input Power 60 W
Power supply 200 - 240 V ~ 50 / 60 Hz
Power consumption 50 W
FM Tuning Range 87.5 ~ 108.0 MHz
AM Tuning Range 522 ~ 1,620 kHz
 Click on the pictures to magnify
SMPS
Decoder
CD Servo
Amplifier
Voltage chart
Exploded view
HOW TO UPDATE ESS PROGRAM
(1) Rename the file name to download as “LG_(MODEL NAME)_(Vresion).ROM” in upper cases.
ex) XA66 : “LG_XA66_0905180.ROM”
Refer to the Standard for naming of software.
(2) Copy the file to the formatted USB, and burn it.
(3) Move to the USB function, and insert the USB to the set.  The upgrade information will be shown on the screen.
(4) Remove the USB.
(5) Remove and reconnect the power cable when it changes to logo screen from upgrade information.  Then the upgrade process is completed.
HOW TO UPDATE SANYO PROGRAM 
(1) Change the file name to download as “(MODEL NAME)_(Version).HEX”. in upper cases
ex) XA66: XA66_0809262.HEX
(2) Copy the file to the root folder of USB storage.
(3) Put the USB into the set.  Then the upgrade process will be started with the upgrade information.
(4) If the upgrade process is complete, the set will be rebooted with “Complete” message.
HOW TO UPDATE MCS PROGRAM
(1) Change the file name to download as “(MODEL NAME)_(OPTION)_(Version).mcs”. ex) XA66_0000_02.mcs
(2) Copy the file to the root folder of USB storage.
(3) Put the USB into the set. Change set function to USB function.  Then the upgrade process will be started with the upgrade information. FLD display "UPGRADE".
(4) If the upgrade process is complete, the set will be rebooted with “SUCCESS” message, and set auto power off.
(5) Pull out the USB Storage. Press the power key.
Repair notes
1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.
3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.
4) Laser beams may damage the eyes.  Absolutely never permit laser beams to enter the eyes.  Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
5) Cleaning the lens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort lens.
6) Never attempt to disassemble the pick-up.
Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.
(Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.)
Posted By: FRANK at 02:38
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