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AIWA XRM131
Service Manual


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

Description of AIWA XRM131 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

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Text excerpt from page 29 (click to view)
<MW / LW ADJUSTMENT> > For MW / LW adjustment, do wiring and connection as in the following.
60cm

Standerd Signal Generaor

SET TP Lch Rch GND

Connect to the respective measuring equipment

5. IF ADJUSTMENT (MW) Requirement Measuring equipment: Oscilloscope or Millivoltmeter Test point: TP7 (IC771 24pin), GND Adjustment point: L772 (1) Adjust the setting of Standard Signal Generator (hereinafter S.S.G.) to 450KHz of 30% variation. (2) While looking at the waveform on the oscilloscope, reduce the output level all the way. (3) Adjust L772 until the waveform of the oscilloscope reaches the maximum.

OSCILLOSCOPE

Lch Rch GND

CH1

CH2

GND

6. TRACKING ADJUSTMENT (MW) Requirement Measuring equipment: Millivoltmeter Test point: TP2, TP3, GND Adjustment point: L773 (1) Adjust the S.S.G. setting to 1000KHz of 30% variation and reduce the output level all the way. (2) Adjust the reception frequency of the main unit to 1000KHz. (3) Adjust L773 until the value of the millivoltmeter reaches the maximum.

AC MILLIVOLTMETER

TP2
GND

CH1

CH2

GND

TP3

7. TRACKING ADJUSTMENT (LW) Requirement AC MILLIVOLTMETER Measuring equipment: Millivoltmeter Test point: TP2, TP3, GND Adjustment point: TC941, L941 TP2 CH1 CH2 (1) Adjust the S.S.G. setting to 290KHz of 30% variation and reduce the output level all GND the way. GND (2) Adjust the reception frequency of the main unit to 290KHz. TP3 (3) Adjust LTC941 until the value of the millivoltmeter reaches the maximum. (4) Adjust the S.S.G. setting to 144KHz of 30% variation and reduce the output level all the way (5) Adjust the reception frequency of the main unit to 144KHz (6) Adjust LTC941 until the value of the millivoltmeter reaches the maximum. (7) Repeat the adjustment 2 to 3 times from 1 to 6 above.

-29-

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