Test Setup; Table 1 Test Equipment And Special Tools - Motorola HSN4035 Service Instructions Manual

Test Setup

Description
Test Connector
DC Power Supply
Audio Analyzer
Function Generator
Digital Multimeter
Oscilloscope
Resistor, Fixed, 4-Ohms (+/- 20
percent) 20 Watts
2
1. Secure the test equipment listed in Table 1 or its equivalents.
2. Refer to Figure 1 and Table 2 on page 3 and assemble a test
connector for the amplifie5-loudspeaker as follows:
1. Crimp a 24-inch length of stranded insulated 18 AWG
hookup wire onto each of the four female connector pins.
2. Insert female connector pins into positions 1, 2, 4, and 5 in
Molex connector body.
3. Tag free end of wires as shown in Figure 1.
3. Turn on power supply, set power supply output voltage to 13.8
VDC, and set current limit to 1.5 Amperes. Then turn off power
supply.
4. Connect positive (+) terminal of power supply to pin 5 of test
connector assembled in step 2 above. Connect negative terminal
of power supply to pin 4 of test connector.
5. Turn on function generator and set it up to generate a 1-kHz
sinewave signal with an amplitude of 230-mV rms and a DC offset
of +4.4 Vdc.
6. Connect function generator output to pins 1 and 4 (return) of test
connector.
7. On amplifier-loudspeaker to be tested, set Volume potentiometer
knob to mechanical midrange.
8. Plug connector on amplifier-loudspeaker 9-foot cable into test
connector. Then energize power supply.

Table 1 Test Equipment and Special Tools

Manufacturer
Fabricated at Test
Facility
Hewlett Packard
Hewlett Packard
Hewlett Packard
Fluke
Tektronix
Dale
Model No./Part No.
See Figure 1 and Table
2 Below
6200
8903B
3311A
27
TDS 544A or 2430A
H25, 4-Ohms
Notes
Must be capable of
providing 13.8-Vdc, 2.0
Amperes regulated
power.
Must be capable of
providing a 1-kHz test
signal with a +4.4-Vdc
offset .
See note at end of this
table