JBL Studio S120PII, Service Manual

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Parameter Spec Unit
QA Test
Limits Conditions Notes
Transients/Pops
ATO Transient 5 mV-peak n/a @ Speaker Outputs
Turn-on Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Efficiency 70 % 65 Rated power Nominal Line voltage 120 VAC
Stand-by Input Power 12 Watts 15 @ nom. line voltage
Maximum allowable input power under nominal
Input voltage and frequency, in stand-by mode
(HOT or COLD operation).
Power Cons. @ rated power 400 Watts 400 @ nom. line voltage 250 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
DC Offset Protection YES - DC present at Speaker Out leads Relay or crowbar (for driver/fire protection),
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
S120PII Studio Series
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