Psw-D110/Dps-10 Test Set Up And Procedure - JBL PSW-D110 Service Manual

Amplifier/Subwoofer
PSW-D112/DPS-12 TEST SET UP AND PROCEDURE
CD PLAYER
PRE AMP
AMPLIFIER
SPEAKER LEVEL
General Function
UUT = Unit Under Test
1. Connect both right and left line level inputs (RCA) to signal generator and UUT. Use Y-cable if necessary from
mono source. VOLUME control should be full counterclockwise.
2. Turn on generator, adjust to 50mV, 50 Hz.
3. Plug in UUT; red LED should be ON. Turn VOLUME control full clockwise. Low Pass control should be set fully
clockwise (180).
4. LED should turn Green; immediate bass response should be heard and felt from port tube opening.
5. Turn off generator, turn VOLUME control fully counterclockwise, disconnect RCA cables.
6. Connect one pair of speaker cables to either high level input terminal on UUT. Cables should be connected to
an integrated amplifier fed by the signal generator.
7. Turn on generator and adjust so that speaker level output is 2.0V, 50 Hz. Turn VOLUME control full clockwise.
8. Green LED should light, immediate bass response should be heard and felt from the port tube opening.
Sweep Function
1. Follow steps 1-4 above, using a sweep generator as a signal source.
2. Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any
other noises. If any unusual noises are heard, remove driver and test.
Driver Function
1. Remove driver from cabinet; detach + and - wire clips.
2. Check DC resistance of driver; it should be 3.9 ohms.
3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by
a signal generator and adjust so that speaker level output is 5.0V.
4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.
AC VOLT METER ( 6V )
LINE LEVEL
PWS-D110
OR DPS-10
UNDER TEST
Low
Pass
FROM High Pass
LINE-LEVEL
Output
SOURCE
Line
Input
SPEAKER
OUTPUT FROM
AMPLIFIER
PSW-D110/DPS-10
120
90 150
60 180
L R
R R
L L
SPKR SPKR
IN OUT
1 0