Noti dlya bayana iz filjma bumer youtube. Contents.......2 Safety Precauti ons......3 Control Descriptions......4 Specifications.......7 Adjustment Instructions.....8 T rouble Shooting.....12 Printed cir cuit board.....16 Block Diagram......18 Exploded Vie w......20 Exploded Vie w Parts List.....21 Replacement Parts List..... During the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

Download LG CHASSIS MC-049B SCH service manual & repair info for electronics experts.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Keep wires away from high voltage or high temperature parts. Due to high vacuum and large surface area of picture tube, extreme care should be used in. With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs.

Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity.

Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to 0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

HOT - BU808DF Enrolled in repairing TV Vestel VR2106TF. Chassis 11AK30A11. The defect of this - in stand-by mode BP quietly ' yelps, and the operating mode everything is normal. At the autopsy it was found that the filter capacitor C -827 4700mkf x 16 volt outlet BP vspuchen and it unstable voltage 22-24 volts. When the TV set in working mode it stable nine volts. And the TV is working properly.

They tried to replace the C- 827 to a new tank 4700 microfarads at 25 volts - the effect is the same, only now unstable voltage on C -827 from 30 to 33 volts. And in operation again everything is normal stable 9 volt.

While others stress how? Verify the OS - and its optocouplers stud. Show do not forget to put a Q804 and D801 near optocouplers, already two cases for this month The repairs came from a broken back for repairs came from a broken back BU808DFI in high parts. After replacing the earned but the food at 135 instead of 115V?. BP collected at 44608r40. Des Lombards litas in the primary and optocouplers but without results.

He left in the duty room nanoparticles, uprom again croaked BU808DFI in the duty room, when it replaced again 10.2v, listened to him, but he barely audible hush ( in the duty room ), and the collector napruga changes 10.2 - 10.4. Working day and night can work. Vnaydenoy in nete scheme B + = 150V - perhaps it should be for a 51 pipe? Javascript: emoticon (' [ندعوك أو لمعاينة هذه الصورة]' ) who face, tell me, pliz. Thank you in advance. Check, and better replaced right away cond 10mkf in the basic chain BU808.

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The transistor die only in the duty room and not immediately, but since it does not work prikopatsya. Also it was like BU808DFI in JVC AVK14T3.

And Litas everything changes, such as required, and 808 normal set (of the same party and with a normal resistance to b -e - in other TV work ) and heating was weak in the office. And fly, too, only with a long work in Dej.

Never understood what it was. And there is resistance in the collector circuit penultimate stage picking (somewhere found on the boards ). Flew only in Dej. All done on line.

It will soon have, probably, bring it. Only in the night.

Even probyval device put on the collector, after 3 hours, when I came kurnut - dead skunk. I could not tolerate 5 min. And also in the night. In the duty room heated? Hush pitalka in the case when dry Konda of B + or a small container S817 ( necessary to select manually for each apparatus individually). In the duty room transistor must not die - the only reason - spontaneously switched briefly to the operation mode from power surges - the reason, I think, be found in the piping SCR MCR22 - very often, this scheme becomes unstable. Check the resistor R817, and better to replace it and see S857 - 100p SMD performance, the second leg 44608.