Aiwa XS-DV335 Service Manual page 39

1. VT Adjustment (LW)
Requirements
Measuring instruments: Digital multimeter
Test point: VT, GND
Adjustment point: L942
(1) Adjust the receiving frequency of the unit to 144kHz.
(2) Adjust L942 so that the digital multimeter indicates 1.3V ± 0.05V.
(3) Adjust the receiving frequency of the unit to 290kHz.
(4) Check that the digital multimeter indicates 8.0V or below.
2. VT Check (MW)
Requirements
Measuring instruments: Digital multimeter
Test point: VT, GND
(1) Adjust the receiving frequency of the unit to 1,602kHz.
(2) Check that the digital multimeter indicates 8.0V or below.
(3) Adjust the receiving frequency of the unit to 531kHz.
(4) Check that the digital multimeter indicates 0.6V or above.
3. VT Check (FM)
Requirements
Measuring instruments: Digital multimeter
Test point: VT, GND
(1) Adjust the receiving frequency of the unit to 108.0MHz.
(2) Check that the digital multimeter indicates 8.0V or below.
(3) Adjust the receiving frequency of the unit to 87.5MHz.
(4) Check that the digital multimeter indicates 0.6V or above.
4. CLOCK Check
Requirements
Measuring instruments: Frequency counter
Test point: CLOCK, GND
(1) Set the unit function to MW, and adjust the receiving frequency of the unit to 1,602kHz.
(2) Check that the frequency counter indicates 2,052kHz ± 45Hz.
– 39 –
DIGITAL MULTIMETE R
V
VT
GND
DIGITAL MULTIMETE R
V
VT
GND
DIGITAL MULTIMETE R
V
VT
GND
FREQUENCY COUNTE R
CLOCK
GND
Hz