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GRUNDIG VARIXX UMS 4200
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English, German
Price: $4.99

Description of GRUNDIG VARIXX UMS 4200 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English, German

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Text excerpt from page 13 (click to view)
Varixx UMS 4200

Abgleichvorschriften / Adjustment Procedures

Abgleichvorschriften
Tuner
Messgeräte: Mess-Sender, Oszilloskop, Digital-Voltmeter

Abgleich 1. AM-Oszillator

Vorbereitung AM; Digital-Voltmeter an Messpunkt TP1. AM; Mess-Sender 450kHz über Loop-Antenne ankoppeln; Ue > 70dBµV; fmod = 1kHz; m = 30%; Oszilloskop an Lautsprecher-Ausgang. AM; Mess-Sender über Loop-Antenne ankoppeln; Ue > 40dBµV; fmod = 1kHz; m = 30%; Oszilloskop an Lautsprecher-Ausgang. FM; Digital-Voltmeter an Messpunkt TP2. FM; Mess-Sender an FM-Antennen-Eingang; Ue = 20dBµV; fmod = 1kHz; Hub = 75kHz; Oszilloskop an Lautsprecher-Ausgang.

Abgleichvorgang Mit T202 bei 1602kHz auf 7,5V ± 0,5V abgleichen.

2. AM-ZF

Mit T201 auf NF-Maximum abgleichen.

3. AM-Vorkreis

Wechselweise mit MW COIL (verschieben) bei 558kHz und mit VC201 bei 1440kHz auf NF-Maximum abgleichen.

4. FM-Oszillator

Mit L203 (verbiegen) bei 108,0MHz auf 7,5V ± 0,5V abgleichen. Wechselweise mit L204 (verbiegen) bei 88,0MHz und mit VC202 bei 106,0MHz auf NF-Maximum abgleichen. L208 (verbiegen) wechselweise bei 88,0MHz und bei 108,0MHz auf NF-Maximum abgleichen (ausmitteln).

5. FM-Vorkreise

Cassette
Messgeräte: Oszilloskop, Frequenzzähler, Test-Cassette 3150Hz/10kHz (z.B. 448A) Abgleich 1. Bandgeschwindigkeit Vorbereitung Frequenzzähler an Lautsprecher. Test-Cassette (3150Hz-Teil) abspielen. Abgleichvorgang Mit Motorpoti auf 3150Hz ± 10Hz abgleichen.
Motorpoti

2. Azimut

Oszilloskop an Lautsprecher. Test-Cassette (10kHz-Teil) abspielen.

Mit Kopfschraube A auf maximalen und gleichen Pegel in beiden Kanälen einstellen.

A

3. Löschoszillator

Frequenzzähler an CN302(-1). Aufnahme starten.

Mit T360 auf 60kHz ± 100Hz abgleichen.

GRUNDIG Service

2-1

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