8.TRACKING ADJUSTMENT (
L
W)
Requirement
Measuring equipment: Millivoltmeter
Test point: TP8(Lch), TP9(Rch), GND
Adjustment point: L941, TC942
(1) Adjust the S.S.G. setting to 144
k
Hz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
(2) Adjust the reception frequency of the main unit to 144
k
Hz.
(3) Adjust L941 until the value of the millivoltmeter reaches the maximum.
(4) Adjust the S.S.G. setting to 290
k
Hz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
(5) Adjust the reception frequency of the main unit to 290
k
Hz.
(6) Adjust TC942 until the value of the milivoltmeter reaches the maximum.
(7) 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.
SET
Standerd Signal Generaor
TP
Lch
Rch
GND
measuring equipment
Connect to the respective
9.TRACKING ADJUSTMENT
(FM)
Requirement
Measuring equipment:
M
illivoltmeter
Test point: TP8(Lch), TP9(Rch), GND
Adjustment point: L905, L904, L902, L901
(1) Adjust the S.S.G. setting to 144
k
Hz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
(2) Adjust L905 > L904 > L902 > L901 until the value of the milivoltmeter reaches the
maximum.
(3) Adjust L901 > L902 > L904 > L905 until the value of the milivoltmeter reaches the maximum.
(4) Repeat the adjustment 2 or 3 times from step 2 to 3 above.
AC MILLIVOLTMETER
CH2
CH1
GND
TP8
TP9
GND
AC MILLIVOLTMETER
CH2
CH1
GND
TP8
TP9
GND
–
54
–
d u
p a
t o
r
Summary of Contents for XR-EM52
Page 31: ... 31 SCHEMATIC DIAGRAM 4 TUNER d u p a t o r ...
Page 38: ... 38 IC BLOCK DIAGRAM d u p a t o r ...
Page 39: ... 39 d u p a t o r ...
Page 46: ... 46 VOLTAGE CHART d u p a t o r ...
Page 47: ... 47 d u p a t o r ...
Page 48: ... 48 d u p a t o r ...
Page 65: ... 65 CD MECHANISM EXPLODED VIEW 2 2 3ZG 2 A 3 6 2 5 1 9 10 4 7 8 d u p a t o r ...