Harman JBL ARENA SUB100P

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Summary

JBL ARENA SUB100 P Service Manual

Subwoofer Rear-Panel Controls

Power & Standby Controls

Covers Power Mode switch and On/Standby LED indicator for operational status.

Signal & Volume Adjustments

Includes Phase, Crossover, and Volume controls for sound tuning.

Input and Power Connections

Details Subwoofer Input and AC Power Input ports for connectivity.

Main Power Switch

The primary switch to turn the unit on or off.

Troubleshooting Flow Chart

DC Voltage and Power Checks

Verifies power supply voltages and DC output for operational status.

Performance & Circuit Tests

Assesses frequency response, sensitivity, limiter, and distortion for proper function.

Idle Noise Diagnosis

Procedures to identify and resolve unwanted system noise when the unit is idle.

The JBL Arena SUB100P is a 100-watt, 10-inch powered subwoofer designed to enhance the low-frequency performance of an audio system. It features a Class D amplifier and is engineered for stability under varying load conditions.

Function Description:

The subwoofer's primary function is to reproduce low-frequency sounds (bass) to complement main speakers, providing a more immersive and impactful audio experience. It includes several controls on its rear panel for integration into different audio setups.

Usage Features:

Power Mode: The subwoofer offers two power modes: 'Auto' and 'On'. In 'Auto' mode, it automatically turns on when an audio signal is detected and enters standby after approximately 10 minutes of no signal. In 'On' mode, it remains powered until the Power Switch is turned 'Off'.
On/Standby LED: A blue LED indicates the subwoofer is 'On', while a red LED signifies 'Standby' mode.
Phase Switch: This switch allows users to adjust the subwoofer's phase (Normal or Reverse) to ensure its transducer moves in and out of phase with the main speakers, optimizing bass integration.
Crossover Control: This control determines the highest frequency the subwoofer will reproduce, allowing for seamless blending with the main speakers. The range is 50Hz to 150Hz.
Volume Control: A dedicated control adjusts the subwoofer's output level.
Subwoofer Input: The subwoofer connects to a receiver/processor's dedicated subwoofer or LFE output via a single RCA connector with a gold finish.
Power Switch: A toggle switch to turn the subwoofer 'On' or 'Off'.
AC Power Input: Standard AC power connection.

Important Technical Specifications:

Output Power: 100 Watts RMS (Rated Output Power at 1% THD @ 50Hz). It can deliver up to 95W (DV1-120) or 99.11W (DV1-230) at 1% THD @ 50Hz. RMS Burst power is 96.85W.
Speaker Coil DCR: 3.7 Ohms.
Nominal Load Impedance: 4 Ohms.
Frequency Response (Crossover Control): 50Hz – 150Hz.
Damping Factor (50Hz): >20 DF (typically 29.58 for DV1-120 and 28.26 for DV1-230).
Input Sensitivity (Line Input): 6.524 mVrms (To 1 Watt, Crossover at Max).
System Gain: 49.73 dB (To 1 Watt, Crossover at Max).
Input Dynamic Range: 2 Vrms.
Input Impedance (Line Input): 10 KOhms.
Signal-to-Noise Ratio (A-Weighted): 75 dBA (typically 69 dBA).
Residual Noise Floor: <2.5 mVrms (typically 0.531 mVrms for DV1-120 and 0.322 mVrms for DV1-230).
THD @ Rated Power: 0.5% (typically 0.14% for DV1-120 and 0.08% for DV1-230 with 22KHz filter + AUX-0025).
THD @ 1 Watt: 0.3% (typically 0.08% for DV1-120 and 0.08% for DV1-230 with 22KHz filter + AUX-0025).
DC Offset: <50 mV-DC (typically 63 mV).
Limiter: Compressor limiter with <10% THD as a result of limiting (typically 0.87% for DV1-120 and 0.85% for DV1-230).
Power Supply: SMPS (Switch-Mode Power Supply), not auto-ranging, with internal jumper for voltage selection. Efficiency >85%.
Standby Input Power: <0.5 Watt.
Efficiency at Rated Power: >75% (typically 62.8% for DV1-120 and 65.5% for DV1-230).
AC Line Voltage: US 120vac/60Hz, EU 230vac/50-60Hz, JAPAN 100vac/50-60Hz.
Protections: Thermal Protection, DC Offset Protection, ESD Protection, Short Circuit Protection. The amplifier should resume operation after short circuit condition removal.
Mechanical Dimensions (Plate Amplifier): 7.49 x 8.67 inches (W x H).
System Weight: 21.75 Lbs.

Maintenance Features:

Troubleshooting Flow Chart: The manual provides a detailed flow chart for diagnosing common issues related to power, DC voltages, frequency response, sensitivity, limiter circuit, power and distortion, and idle noise. This chart guides technicians through checks for specific components like U4, Q1, U1, BD3, T1, R82, R83, Q6, Q21, Q22, Q23, R80, R81, U104, U105, filter PCB components (U105, U106, U107, VR101, VR102), U2, R26, R25, C57, C54, Q105, D147, D106, D112, C64, C65, L5, L7, C53, C265, and filter capacitors.
Exploded Views: Detailed exploded diagrams are provided for the overall subwoofer assembly, the amplifier part, and the packaging, aiding in identification and replacement of components.
Spare Parts List: A comprehensive list of spare parts with part numbers and descriptions is included, facilitating repairs and component sourcing.
Replaceable Fuse: The line fuse is a T2AL Amps, 250V time-delay type, accessible through the rear panel for easy replacement.
Serviceability: The design ensures that the amplifier plate is airtight, preventing air leaks, which is crucial for optimal performance.