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در یکی از سایتهای بیگانه میگشتم به مورد جالبی بر خوردم.
در پاسخ به پرسش کاربری که با ارور LNBFدر دستگاهش بر خورده بود. مدیر بخش با چه وسواسی پاسخ داده حتی به ساده ترین نکات هم اشاره کرده.فقط تعجب کردم قیمت رگولاتور317چقدر اونجاها گرونه.
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This content was C/P from: How to Repair LNBF In The Message Screen How to Repair LNBF In The Message Screen
How to Repair LNBF In The Message ScreenProcedure 1:
1 .- Turn off the receiver's rear switch ... (disconnect it from the outlet for 15 minutes)
2 .- Disconnect the cable from the lnb (sat in)
3 .- Now turn the receiver again ...
If the message does not appear, try another lnb, also check all the connections it could be a short circuit.
Procedure 2:
If the message persists, follow these instructions:
The LNBF error usually means that the transistor Tip42C exploded.
Here and try and fix the problem.
You need a voltmeter in volts DC.
1 .- First you need to check the voltage at sat in connection.
2 .- Connect a short coaxial cable to the Sat input in and check the voltage between the copper and the screw connector.
3 .- With the receiver ON you should get voltage variations from 13V-18V DC as change
from vertical to horizontal transponders.
4 .- If no voltage or only 20V then you most likely have a transistor operated either Tip42c or KA317. This unit changes the voltage of your LNB 13V and 18V. 18V = Horizontal TP's
13V = Vertical TP's
When they fail or will not have to stay in voltage or 20V or 13V and only you can get horizontal or vertical transponders on the receiver. If no voltage then you get the message No Signal.
Take off the cap to your box and look at the card looking for a small black transistor (it has the metal top with a hole, the pin heat sink and three below) is located about an inch in front of where you connect the cable from the lnb .
Could be attached to a heat sink but not in all cases.
Make sure it is correct, part or in case Tip42c is Viewsat, and Sonicview CNX is the KA317.
The Tip42C is located directly opposite the chrome box where you connect the coaxial cable.
It is black metal and plastic top with a pin hole and three soldiers to the card.
Tip42C or KA317 is printed on the black plastic. Viewsat Ultra's, Sonicview and use the Fairchild KA317 CNX and is mounted on the heat sink. If the KA317 is damaged in an LNBF CNX get the message Error. Write as if you ride is soldered to the contrary will not work. If you are receiving a message and you have no signal voltage at the connector Sat in, connect the
lnb cable with a screwdriver and touch the first two pins toward the back of the receiver at the same time. If obtiens signal then this transistor is bad and must be replaced. The NTE332 transistor is a direct replacement if you can not find Tip42C. TIP42 or Tip42B not work.
The approximate cost is $ 2.00. You must be Tip42C or NTE332 or in the case of Viewsat, and Sonicview CNX Fairchild KA317.
The direct replacement to the Fairchild LM317T KA317. The NTE332 costs about $ 5.00 but is more robust and are worth the extra money. Available at most electronic stores.
To replace make sure that you write like this soldier, despegelo the heat sink if it stuck to one, remove the motherboard and below the three pin desold using the proper tool, insert new transistor and resuelde, attach the heat sink if there was one.
will let you know how I get on
