Pioneer XR-MR7 Service Manual page 89

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6.5.2 M-S Mix Ratio Adjustment
Test Point
Adjustment Point
Adjustment Value
Symptom when out of
adjustment
[Procedure]
(1) Press the "AUTO/MANUAL" button so that "02 F3" appears on the FL display.
(2) Press the "FINALIZE" button for focus-in.
(3) Press the PLAY button for CAV-servo spindle kick (the status where the spindle rotates with the focus servo on and tracking servo off).
(4) Adjust with the "RECORD" button and the "REC MUTE" button until the value to be reached is obtained.
(5) Press the "SET" button to register the adjustment.
Once the adjustment is registered with the "SET" button, "D.VOL" on the FL display will disappear.
(6) Press the "STOP" button to stop the unit.
Note: For adjustment, use the following circuits.
39kΩ
TE
39kΩ
MPP
TE VC
L 13942296513
Note: Adjustment must be done around mid-radius on a disc.
6.5.3 Tracking Offset Adjustment
Test Point
Adjustment Point
Adjustment Value
[Procedure]
(1) Press the "AUTO/MANUAL" button so that "03 F6" appears on the FL display.
(2) Adjust with the "RECORD" button and "REC MUTE" button until the above adjustment value to be reached is obtained.
(3) Press the "SET" button to register the adjustment.
Once the adjustment is registered with the "SET" button, "D.VOL" on the FL display will disappear.
TE
VC
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Note: Perform the adjustment in Stop mode.
.
This adjustment is possible with the low-pass filter used in adjustment 5 above attached.
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CN102 - pin 4 (TE) and pin 3 (MPP)
RECORD button and REC MUTE button
Adjust until the value of the output signals from pin 4 (TE) and pin 3 (MPP) of CN102 are the same,
or the differential output of these signals is minimal.
Sound broken, record characteristics deteriorate
CH1
0.001µF
10 : 1
Oscilloscope
CH2
10 : 1
10:1 probe
0.001µF
CN102 - pin 4 (TE)
RECORD button and REC MUTE button
0 mV ± 10 mV
10 : 1
Oscilloscope
10:1 probe
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XR-MR7
9 4 2 8
Test Disc
STD-903
0 5 8 2 9 9 4 2 8
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9 9
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