Harman Kardon HKTS 200 SUB, Service Manual

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Parameter Specification Unit QA Test Limits Test Conditions, Notes, and Comments
Amplifier Section
Type (Class AB, D, other)
D - - No external heat sink required. Digital 192 kHz ternary mode PWM.
Load Impedance (speaker) 4 Ohm - Minimum rated load impedance
Rated Output Power 200 W 200 50 Hz
THD @ Rated Power <0.5 % <1 AUX-0025 + AP DSP Audio A 20kHz LP
THD @ 1 Watt <0.2 % <0.4 AUX-0025 + AP DSP Audio A 20kHz LP
DC Offset <25 mV <35
Damping Factor >10 DF -
Measured at amplifier board, damping factor dependant on H bridge Rdson + output filter
imp SMPS, typically 0.1 + 0.2 + 0.05 Ohm.
Input Sensitivity
Input Reference Frequency
50 Hz - L, R or LFE Input
Input for 1 Watt Output 11.2 mVrms ±1dB RCA input to speaker output, Single input driven
Gain (L, R and LFE inputs) 45 dB - RCA input to speaker output, Single input driven
Signal to Noise
(broad band noise from the ADC is present at the output but not audible)
SNR-A-Weighted 70 dBA 67.5
relative to 1W, AUX-0025 + AP DSP Audio A 20kHz LP + A-Weighting filter, PV
measured ~350 uV
SNR-un-weighted 60 dBr - relative to 1W, AUX-0025 + AP DSP Audio A 20kHz LP , PV measured 2mV
Residual Noise Floor <1 mVrms -
Band-pass Measurement at Line freq.+ harmonics, AUX-0025 + 22K + 20 brick wall filters,
Line level inputs may be terminated using 1K Ohm
Input Impedance
Line Input 10K
Ohms - Applies to L, R or LFE Inputs
Filters & EQ
Implemented using DSP
Amplifier frequency response 30-300 Hz +/-1dB QA limits are relative to reference response
Amplifier frequency response 20-500 Hz +/-3dB QA limits are relative to reference response
LP filter ~160 Hz - Fixed, 4th order
HP Filter ~40 Hz - Fixed, 6th order
LF Boost ~50 Hz - Selectable, 2nd order parametric, +3 dB
AP Filter 80 Hz - Crossover phase alignment.
Limiter
Limiter
Yes - - Digital limiter integral to audio processor IC.
Maximum THD Under Limiting 5 % 7 QA tests THD at up to 15 dB into limiter.
Features
Volume Control Taper
LOG - Functional
Crossover Control No - - Optional, 3-pin header on PCBA for future models.
Phase Control 0/180 Deg. +/-10 2 position, 0 & 180
LF Boost Control Yes Functional 2 position, On & Off
LED Indicator Yes - Functional 2 state, Blue = On, Off = Off
Trigger Input Yes - Functional 3.5mm Mono Jack, Jack Sensing
ATO Control Yes - Functional 2 position, On & Auto
Input Configuration
Line In (R / L )
Yes - Functional RCA Jacks, Red, White (Right and Left)
LFE In Yes - Functional RCA Jack, Purple
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
Yes Functional
ATO Input test frequency 50 Hz Functional
ATO Line input level 1.5 mV Functional QA Test is 1mV verify amplifier is off, 2.5 mV verify amplifier turns on.
ATO Turn-on time <1 s Functional
Time to Turn Off 15 min Functional Time is measured by MCU, PV units measured 14 min.
Ext. Trigger input
Activation Voltage >3 V Functional
Designed to trigger from 3.3 - 30 V sources, AC or DC, QA test uses 3 V DC for fucntion
test. PV amplifiers measured 2.9 V AC, 1.6 V DC.
Activation current <3 mA Functional ~30k input impedance
Transients/Pops
ATO Transient
<0.5 V-pp Functional Speaker Output, Amplifier wake from standby, PV sample < 0.1 V, not audible
Turn-on Transient <0.5 V-pp Functional AC Line Connect, PV sample < 0.1 V, not audible
Turn-off Transient <0.5 V-pp Functional AC Line Disconnect, PV sample < 0.1 V, not audible
Protections
Output Short Circuit Protection
Yes - - Direct short between output terminal, recoverable @ 1 W, 50 Hz
Output Over Current protection 12 A - Integral to power IC
Output DC Protection Yes - -
Detects shorts to ground or VCC on outputs (H-Bridge Failure), LED blinks rapidly, SMPS is
shut down to prevent, checks and attempts recovery every 20 seconds
Thermal Protection Yes NTC sensor adjacent power amplifier IC.
Mains Fuse Rating (120v) 6.3 A slo-blo 250V, Internal Fuse, SMPS PCBA mounted (pigtail, soldered in place).
Mains Fuse Rating (230v) 5 A slo-blo 250V, Internal Fuse, SMPS PCBA mounted (pigtail, soldered in place).
Efficiency
Efficiency at rated power
75 % -
Efficiency at 1/8 of rated power 60 % -
Standby Input power 0.8 W <1
Idle input power 8 W <10
Nominal Line voltage, Mains input to speaker outputs.
HKTS200SUB Amplifier Specifications
HKTS200SUB
harman/kardon
2