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AIWA XRM121
Service Manual


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

Description of AIWA XRM121 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 38 (click to view)
< TUNER SECTION >(HR,HT)
1. Clock Frequency Check Settings : • Test point : TP2 (CLK) Method : Set to AM 1602kHz and check that the test point is 2052kHz ± 45Hz. 2. AM VT Check Settings : • Test point : TP1(VT) Method : Set to AM 1602kHz and check that the test point is less than 8.0V. Then set to AM 531kHz and check that the test point is more than 0.6V. 3. AM Tracking Adjustment Settings : • Test point : TP6(Lch), TP7(Rch) • Adjustment location : L981(1/3) ........................................ 999kHz Method : Adjust L981 (1/3) so that the output becomes maximum.

< DECK SECTION >
1. Tape Speed Adjustment Settings : • Test tape : TTA–100 • Test point : SP–OUT 2V • Adjustment location : SFR1 Method : Play back the test tape and adjust SFR1 for 3000Hz ± 5Hz (FWD) and FWD PLAY speed ± 45Hz (REV).

2. Head Azimuth Adjustment Settings : • Test tape :

TTA–300

Method :

• Test point : SP–OUT 2V • Adjustment location : Head azimuth adjustment screw Play back the 8kHz signal of the test tape and adjust screw so that the output becomes maximum. Next, perform on each FWD PLAY and REV PLAY mode.

4. FM VT Check Settings : • Test point : TP1 (VT) Method : Set to FM 108.0MHz and check that the test point is less than 8.0V. Set to FM 87.5MHz and check that the test point is more than 0.5V. 5. FM Tracking Check Settings : • Test point : TP6(Lch), TP7(Rch) Method : Set to FM 98.0MHz and check that the test point is less than 9.0dBµV. 6. AM IF Adjustment Settings : • Test point : TP6(Lch), TP7(Rch) • Adjustment location : L772 ................................................ 450kHz Method : Adjust L772 so that the output becomes maximum. 7. DC Balance / Mono Distortion Adjustment Settings : • Test point : TP3, TP4 (DC Balance) TP6(Lch), TP7(Rch) (Distortion) • Adjustment location : L771 • Input level : 60dBµV Method : Set to FM 98.0MHz and adjust L771 so that the voltage between TP3 and TP4 becomes 0V ± 0.04V. Next, check that the distortion is less than 1.3%

3. PB Frequency Response Check Settings : • Test tape : TTA–320 • Test point : SP–OUT 2V Method : Play back the 315Hz and 10kHz signals of the test tape and check that the 10kHz signal with respect to that of the 315Hz signal is 0dB ± 3dB. 4. REC/PB Frequency Response Check Settings : • Test tape : TTA–602 • Test point : SP–OUT 2V Method : Input a –20VU signal to the AUX terminal. Record the 1kHz and 10kHz signals on the test tape and play back them. Check that the difference between the record level and the play back level at 1kHz and 10kHz signal is 0dB to ± 3dB.

- 38 -

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