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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday 16 March 2019

HAFLER - 9180 _ HAFLER - 9270 - POWER AMPLIFIER _ SCHEMATIC [CIRCUIT DIAGRAM]

HAFLER - 9180 _ HAFLER - 9270 - POWER AMPLIFIER _ SCHEMATIC [Circuit Diagram]

Power Rating: 9180:
105 watts per channel (8 ohms)
150 watts per channel (4 ohms)
300 watts mono (8 ohms)
9270:
135 watts per channel (8 ohms)
200 watts per channel (4 ohms)
400 watts mono (8 ohms)
The 9180/9270Amplifier is equipped with a Thermal Protection System that constantly monitors the temperature of the heat sinks. When the heat sink temperature reaches a pre-determined level, the amplifier’s circuitry is electronically shut down through the same system that provides the Soft Turn-On function. When the heat sinks cool to a safe operating temperature, normal operation of the amplifier resumes.
Depending upon which new voltage is chosen, it may be necessary to change the AC line fuse. Locate the clip-mounted Line Fuse adjacent to the Voltage Selector plug. Replace the fuse with a new slow-blow fuse as follows.
9180: 100 and 120 VAC: 7 amp.  220 and 240 VAC: 4 amp
9270: 100 and 120 VAC: 10 amp.  220 and 240 VAC: 5 amp
The 9180/9270 Amplifier employs a single control per channel to set the bias operating point of the output stage. This bias point is factory set, and normally should not require adjustment for the life of the product. However, should improper bias be suspected, or if repairs have been made that would require a readjustment of bias.
CLICK ON THE SCHEMATICS TO ZOOM
Posted By: FRANK at 03:32
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