Infinity Beta SW-12, Preliminary Service Manual

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Parameter Specification Unit
QA Test
Limits Conditions Notes
Line In (L,R) & LFE
YES -- functional Dual RCA jack, Lor R is used in LFE mode
Spkr/Hi Level In YES -- functional Binding post connector L&R
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
YES functional Auto - on selection switch in Auto
ATO Input test frequency 50 Hz functional "
ATO Level LFE Input 2 mV functional "
ATO Level Speaker in 50 mV functional "
ATO Turn-on time 2 seconds functional
Amp connected and AC on, then
input signal applied
Auto Mute/ Turn-OFF Time 15 minutes 17
(T) Time before muting, after input
signal is removed Auto turn of time (T) must be 10 > T < 17 Minut
Power on Delay time
3 sec. 4 AC Power Applied
Transients/Pops
ATO Transient
5 mV-peak n/a @ Speaker Outputs
Turn-on Transient 50 mV-peak
1V-pk-pk @ Speaker Outputs
AC Line cycled from OFF to ON
Turn-off Transient 50 mV-peak 1V-pk-pk @ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Efficiency
70 % 65 Rated power Nominal Line voltage 120 VAC
Stand-by Input Power 10 10
@ nominal line voltage, Amp in
OFF state, RED LED activated
Maximum allowable input power LED in RED,
Class D inactive
Stand-by Input Power 12 Watts 15
@ nom. line voltage, Amp in On
state, Green LED activated
Maximum allowable input power under nominal
Input voltage and frequency, in stand-by mode
(HOT or COLD operation, LED GREEN). Class
D active but no signal applied.
Power Cons. @ rated power 325 Watts 338 @ nom. line voltage 220 Watts @ 6.0 Ohms nominal line voltage
Protection
Short Circuit Protection YES functional Direct short at output
Amplifier should resume operation after short
circuit condition removal
Thermal Protection YES
functional @1/8 max unclipped Power
Temperature rise in accessible metal parts
should not exceed 35K rise for domestic version
or 30K rise for European versions (refer to
requirements sheet). Unit is protected for over-
temperature conditions
DC Offset Protection YES
-
DC present at Speaker Out leads Relay opens duisng a DC output condition
Line Fuse Rating
USA-Domestic 4 Amps Type-T or Slo Blo-250 V
EU 2 Amps Type-T or Slo Blo-250 V Internal fuse with UL/SEMKO rated holder
SW-12
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