ELECTRICAL ADJUSTMENT -3/6
8. TRACKING ADJUSTMENT (LW) Requirement Measuring equipment: Millivoltmeter Test point: TP8(Lch), TP9(Rch), GND Adjustment point: L941, TC942 (1) 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). (2) Adjust the reception frequency of the main unit to 144KHz. (3) Adjust L941 until the value of the millivoltmeter reaches the maximum. (4) 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). (5) Adjust the reception frequency of the main unit to 290KHz. (6) Adjust TC942 until the value of the millivoltmeter reaches the maximum. (7) Repeat the adjustment 2 or 3 times from step 1 to 6 above.
TP8 GND TP9 CH1 CH2 GND
AC MILLIVOLTMETER
FM ADJUSTMENT
For adjusting FM, do wiring function and connection as in the following.
Standerd Signal Generaor
SET TP Lch Rch GND
Connect to the respective measuring equipment
9. TRACKING ADJUSTMENT (FM) 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 144KHz 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 millivoltmeter reaches the maximum. (3) Adjust L901 > L902 > L904 > L905 until the value of the millivoltmeter reaches the maximum. (4) Repeat the adjustment 2 or 3 times from step 2 to 3 above.
TP8 GND TP9 CH1 CH2 GND AC MILLIVOLTMETER
