Sunday, November 29, 2015

INFINITY TSS-SUB4000 ACTIVE SUB WOOFER TEST SETUP AND CIRCUIT DIAGRAM

ACTIVE SUBWOOFER 

INFINITY TSS-SUB4000 

TEST SETUP AND CIRCUIT DIAGRAM 

OPERATION
Power On
Plug your subwoofer’s AC cord into a wall outlet. Do not use the outlets on the back of the receiver. Initially set the Subwoofer Level (Volume) Control ¡ to the “min”position. Turn on your sub by pressing the Power Switch on the rear panel.
Auto On/Standby
With the Power Switch in the ON position, the Power Indicator LED on the front of the subwoofer will remain backlit in red or green to indicate the On/Standby mode of the subwoofer. RED = STANDBY (No signal detected, Amp Off) GREEN = ON (Signal detected, Amp On) The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system.The subwoofer will then power ON instantly when a signal is detected. During periods of normal use, the Power Switch can be left on.You may turn off the Power Switch ∞ for extended periods of nonoperation, e.g., when you are away on vacation.
Adjust Gain
Turn on your entire audio system and start a CD or movie soundtrack at a moderate level.Turn up the Subwoofer Level (Volume) Control ¡ about halfway. If no sound emanates from the subwoofer, check the AC-line cord and input cables. Are the connectors on the cables making proper contact? Is the AC plug connected to a“live”receptacle? Has the Power Switch been pressed to the“On”position? Once you have confirmed that the subwoofer is active, proceed by playing a CD, record or cassette. Use a selection that has ample bass information. Set the overall volume control of the preamplifier or stereo to a comfortable level. Adjust the Subwoofer Level (Volume) Control ¡ until you obtain a pleasing blend of bass. Bass response should not overpower the room but rather should be adjusted so there is a harmonious blend across the entire musical range. Many users have a tendency to set the subwoofer volume too loud, adhering to the belief that a subwoofer is there to produce lots of bass.This is not entirely true. A subwoofer is there to enhance bass, extending the response of the entire system so the bass can be felt as well as heard. However, overall balance must be maintained or the music will not sound natural. An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive
Low-Pass Selector
If you have a Dolby Digital or DTS processor/receiver, the Crossover Frequency is set by the processor/receiver. Consult your owner’s manual to learn how to view or change this setting. In this case, the Low-Pass Selector £ should be set to “Off” . We strongly recommend this setup method. When this switch £ is in the“On”position, the subwoofer will reproduce frequencies below 150Hz.
Phase Control
The Phase Switch ¢ determines whether the subwoofer speaker’s piston-like action moves in and out with the main speakers, 0 degree or opposite the main speakers, 180 degree. Proper phase adjustment depends on several variables such as room size, subwoofer placement and listener position. Adjust the phase switch to maximize bass output at the listening position.
TSS-SUB4000 Test Set Up and Procedure

SYSTEM AURAL SWEEP TEST
Equipment needed:
• Function/signal generator/sweep generator
• Multimeter
• RCA cables
General Unit Function (UUT = Unit Under Test)
Switches/knobs on the amplifier faceplate:
Phase switch – either position
Low Pass switch – Off
RABOS switch – Off
1. From the signal generator, Connect both right and left line level inputs (RCA jacks) – to signal generator and
UUT. Use Y-cable if necessary from mono source.
2. On the amplifier, turn the LEVEL control full Counterclockwise (Min).
3. Turn on generator, adjust to 125mV, 50 Hz.
4. Plug in UUT; turn the power switch ON. Turn LEVEL control full Clockwise (Max).
5. LED (on front panel) should now be Green; immediate bass response should be heard and felt from rear port
tube opening.
Sweep Function
1. Follow steps 1-5 above, using a sweep generator as a signal source.
2. Sweep generator from 20Hz to 1kHz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or
any other noises. If any unusual noises are heard, remove woofer and test.
Driver Function (Woofer)
1. Remove woofer from cabinet; detach + and - wire clips.
2. Check DC resistance of woofer; it should be 3.5 ohms +/-10%.
3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated  amplifier fed by a signal generator. Turn on 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.
The main power transformer (toroid) part# 150-r1107010 in the TSS-SUB4000 is not mounted in the amplifier inside the amp cover, but mounted in the cabinet in a separate location.
Replacement:
To replace the power transformer, it is necessary to remove the woofer from the cabinet. The mounting bolt and transformer itself is mounted on an internal brace; both are accessible through the woofer opening.
Troubleshooting:
To keep the circuit “live” while exposing the amplifier components, the amplifier cannot completely be removed and powered up outside the cabinet due to the power connections to the externally mounted transformer. Instead, an alternate method is to leave the amp cover in place and remove the four Phillips screws holding the amp ass’y to the amp cover. Then the amplifier can be partially removed for access, while maintaining the power connections. Unplugging the LED connection (red/black wires) at the PCB plug will allow the amp to be removed even further.
CIRCUIT DIAGRAM 
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