Aiwa XR-EM20 Service Manual page 45

ADJUSTMENT (FRONT/DECK/TUNER/CD) - 6/8
6.TRACKING ADJUSTMENT (LW)
Requirement
Measuring equipment: Millivoltmeter
Test point: TP8(Lch), TP9(Rch), GND
Adjustment point: L941, TC942
(8) Adjust the S.S.G. setting to 144KHz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
(9) Adjust the reception frequency of the main unit to 144KHz.
(10) Adjust L941 until the value of the millivoltmeter reaches the maximum.
(11) Adjust the S.S.G. setting to 290KHz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
(12) Adjust the reception frequency of the main unit to 290KHz.
(13) Adjust TC942 until the value of the milivoltmeter reaches the maximum.
Repeat the adjustment 2 or 3 times from step 1 to 6 above.
<FM ADJUSTMENT>
For adjusting FM, do wiring function and connection as in the following.
7.TRACKING ADJUSTMENT
Requirement
Measuring equipment: millivoltmeter
Test point: TP8(Lch), TP9(Rch), GND
Adjustment point: L901,L902,L904,L905
(1) Adjust the S.S.G. setting to 87.5KHz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
(2) Adjust L901,L902,L904,L905 until the value of the milivoltmeter reaches the
maximum.
Standerd Signal Generaor
SET
TP
Lch
Rch
GND
-45-
AC MILLIVOLTMETER
CH1
TP8
GND
TP9
Connect to the respective
measuring equipment
AC MILLIVOLTMETER
CH1
TP8
GND
TP9
CH2
GND
CH2
GND