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A great manual; it contained all the information I required and allowed me to restore the receiver to full working condition!
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This service manual helped me to repair my PIONEER. Iam very satisfied, that I found it here.
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DECK MECHANISM ADJUSTMENT
5. Audio/Control (A/C) Head Adjustment
Purpose: To insure that the Tape passes accurately over the Audio and Control Tracks in exact Alignment in both the Record and Playback Modes.
5-1. Preliminary Adjustment (Height and Tilt Adjustment) Perform the Preliminary Adjustment, when there is no Audio Output Signal with the Alignment Tape. Test Equipment/ Fixture
� Blank Tape � Screw Driver(+) Type 5mm
-0.05
Test Conditions (Mechanism Condition)
� Play the blank tape
Adjustment Point
� Tilt Adjustment Screw(C) � Height Adjustment Screw(B) � Azimuth Adjustment Screw(A)
Adjustment Procedure/Diagrams
1) Initially adjust the Base Assembly A/C Head as shown Fig. C-5-1 by using the Height Adjustment Screw(B). 2) Play a Blank Tape and observe if the Tape passes accurately over the A/C Head without Tape Curling or Folding. 3) If Folding or Curling is occured then adjust the Tilt Adjustment Screw(C) while the Tape is running to resemble Fig. C-5-3. 4) Reconfirm the Tape Path after Playback about 4~5 seconds.
NOTE
Ideal A/C head height occurs, when the tape runs between 0.2~0.25mm above the bottom edge of the A/C head core.
A/C Head P4 Tape
10.9
Tape
0.2~0.25mm
A/C Head Base Fig. C-5-1 Fig. C-5-3
X-Value Adjustment Hole
Fixed Screw
Azimuth Adjustment Screw(A)
Tilt Adjustment Screw(C) Height Adjustment Screw(B)
A/C Head Assembly Fig. C-5-2
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