Panasonic SB-HC950 - User Manual

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Summary

System Combination

System Breakdown

Details the breakdown of speaker combinations used in main unit systems.

Packaging Information

Provides information regarding packaging conditions for the speaker system.

Assembling and Disassembling

Disassembly flow chart

Outlines the procedure for disassembling the casing and internal parts for inspection.

Disassembly of Rear cabinet

Step-by-step guide to remove the rear cabinet of the speaker system.

Disassembly of Woofer 1

Instructions for detaching and removing the first woofer unit.

Disassembly of Woofer 2

Instructions for detaching and removing the second woofer unit.

Disassembly of Terminal jack

Procedure for removing the terminal jack from the speaker.

Connection of the Speaker Cables

Connection of the Wiring Diagram

Exploded view

Cabinet Parts Location

Illustrates the location of various cabinet parts with reference numbers.

Summary

System Combination

System Breakdown

Details the breakdown of speaker combinations used in main unit systems.

Packaging Information

Provides information regarding packaging conditions for the speaker system.

Assembling and Disassembling

Disassembly flow chart

Outlines the procedure for disassembling the casing and internal parts for inspection.

Disassembly of Rear cabinet

Step-by-step guide to remove the rear cabinet of the speaker system.

Disassembly of Woofer 1

Instructions for detaching and removing the first woofer unit.

Disassembly of Woofer 2

Instructions for detaching and removing the second woofer unit.

Disassembly of Terminal jack

Procedure for removing the terminal jack from the speaker.

Connection of the Speaker Cables

Connection of the Wiring Diagram

Exploded view

Cabinet Parts Location

Illustrates the location of various cabinet parts with reference numbers.

This document outlines the service and maintenance procedures for the SB-HC950P speaker system, a component designed to integrate into various home theater and music systems. It provides comprehensive instructions for assembly, disassembly, and connection, ensuring proper setup and troubleshooting.

The SB-HC950P is a 2-way, 2-speaker system featuring a bass reflex design. It is primarily intended for use as a center speaker within a larger home theater setup, as indicated by its inclusion in various speaker system combinations like the SB-PT950P-K and SB-PT1050P-K. These combinations typically include front, surround, and center speakers, with the SB-HC950P-K specifically serving the center channel role. Its design focuses on delivering clear audio for dialogue and central sound elements in a multi-channel audio environment.

Usage Features:

The manual emphasizes several key aspects for optimal use and performance of the SB-HC950P speaker system:

Speaker Cable Connection: Before connecting the AC power supply cord, users must ensure all speaker cables are properly connected. The load impedance for any speaker used with this unit must be 6 Ω. It is crucial to connect the cable from the right speaker to the right terminal and the cable from the left speaker to the left terminal. For connection, users should twist and pull off the vinyl tip of the speaker cords. If the cords lack vinyl tips, they should be connected directly to the terminals, ensuring the bare ends of the wires are not unraveled. The wire is then inserted into the rear panel of the unit, and the lever is closed. The manual provides a detailed diagram for connecting the speaker cables to the main unit (e.g., PT950), illustrating the correct insertion of wires for front (L), front (R), center, and subwoofer channels. Speaker cable stickers are included to facilitate easier identification and connection.
Polarity and Short-Circuit Prevention: A critical warning is issued to prevent damage to circuitry: never short-circuit positive (+) and negative (-) speaker wires. Users must connect only positive (white) wires to positive (+) terminals and negative (blue) wires to negative (-) terminals. Crossing or reversing the polarity of speaker wires can damage the speakers.
Speaker Positioning: Proper speaker placement significantly affects bass and the overall sound field. Speakers should be placed on flat, secure bases. Placing them too close to floors, walls, and corners can result in excessive bass. Covering walls and windows with thick curtains can also influence sound quality. For proper ventilation, speakers should be kept at least 10 mm (13/32") away from the system.
Setup Example: The manual provides a setup example for a home theater system, suggesting that front, center, and surround speakers be placed at approximately the same distance from the seating position. The "Auto Speaker Setup" feature is recommended for achieving ideal surround sound when equal distance placement is not feasible. The center speaker (SB-HC950P) should be placed on a rack or shelf. A warning is given that vibration caused by the speaker can disrupt the picture if it is placed directly on the television.
Wireless System Integration: For systems incorporating wireless components (e.g., PT950 Surround speaker), the wireless system should be placed within approximately 10 m (33 ft) from the main unit. It is advised not to use wireless equipment in metal cabinets or bookshelves.
Interference Avoidance: To prevent interference, specific distances should be maintained between wireless equipment and other electronic devices operating on the same 2.4 GHz band. For Wireless LAN, a distance of approximately 2 m (6-1/2 ft) is recommended, and for cordless phones and other electronic devices, also approximately 2 m (6-1/2 ft). The wireless equipment is designed to automatically seek a clear channel if interference occurs, indicated by the "W1" link indicator flashing on the main unit and a brief audio interruption. If interference persists, users should try moving other devices or the wireless equipment to different locations.
Speaker Usage Precautions: Only the supplied speakers should be used, as using other speakers can damage the unit and negatively affect sound quality. Playing sound at high levels for extended periods can damage the speakers and shorten their useful life. The volume should be reduced when playing distorted sound, when speakers reverberate due to external noise sources (record players, FM broadcasts, oscillators, test discs, electronic instruments), when adjusting sound quality, or when turning the unit on or off.
Television Coloring Issues: The front and center speakers are designed for close proximity to a television, but they might affect the picture on some televisions. If irregular coloring occurs, turning the television off for about 30 minutes should allow its demagnetizing function to correct the problem. If it persists, the speakers should be moved further away from the television.
General Safety Warning: A critical caution states that the main unit and supplied speakers are to be used only as indicated in the setup. Failure to do so may lead to damage to the amplifier and/or speakers, and may result in a risk of fire. A qualified service person should be consulted if damage occurs or if there's a sudden change in performance. Users should not attempt to attach these speakers to walls using methods other than those described in the manual.
Handling: Users should avoid touching the front netted area of the speakers and instead hold them by the sides.

Maintenance Features:

The service manual provides detailed instructions for disassembling and reassembling the SB-HC950P, which are essential for internal inspection, repair, and component replacement.

"ATTENTION SERVICER" Guidelines:
- Sharp Edges: Technicians are warned that some chassis components may have sharp edges, requiring caution during disassembly and servicing.
- Procedure Focus: The section describes procedures for checking the operation of major printed circuit boards and replacing main components.
- Reassembly: For reassembly after operation checks or replacement, technicians must reverse the respective disassembly procedures. Special reassembly procedures are noted where required.
- Parts Reference: Technicians should refer to the "Parts Location and Replacement Parts List" (Section 6) for part numbers when checks or replacements are needed.
- Original Screws: A caution emphasizes the importance of using original screws during reassembly.
Disassembly Flow Chart: A clear flow chart illustrates the procedure for disassembling the casing and internal parts for inspection. To reassemble, the steps are reversed. The main components for disassembly include the Rear cabinet, Terminal jack, Woofer 1, and Woofer 2.
Disassembly of Rear Cabinet:
- Step 1: Remove 6 screws securing the rear cabinet.
- Step 2: Upset the speaker unit.
- Step 3: Insert a steel rule into the top corner of the rear cabinet as indicated by an arrow.
- Step 4: Apply light force to push out the front panel. A caution warns against exerting strong force to avoid damaging the front panel.
- Step 5: Detach the blue (+) and gray (-) wires.
Disassembly of Woofer 1 and Woofer 2:
- Both woofer disassembly procedures follow steps 1 to 4 of the rear cabinet disassembly.
- Step 1: For Woofer 1, detach the black (+) and gray (-) wires. For Woofer 2, detach the blue (+) and blue (-) wires.
- Step 2: Remove 4 screws for each woofer.
Disassembly of Terminal Jack:
- This procedure follows steps 1 to 5 of the rear cabinet disassembly.
- Step 1: Remove 1 screw from the terminal jack.
- Step 2: Remove the terminal jack as indicated by an arrow.
Connection of the Wiring Diagram: A detailed wiring diagram is provided, showing the connections between the blue (+) and gray (-) input wires, a 5.6µf 50V capacitor (C1), and Woofer 1 and Woofer 2. This diagram is crucial for correct re-wiring during maintenance.
Exploded View and Cabinet Parts Location: An exploded view of the speaker system, along with a diagram showing the cabinet parts location, is included. This visual aid helps technicians identify the placement of various components within the speaker enclosure.
Replacement Parts List: A comprehensive list of replacement parts is provided, categorized under "CABINET AND CHASSIS" and "SPEAKER."
- Important Safety Notice: When replacing any components, technicians must use only manufacturer-specified parts shown in the parts list.
- PAVCSG Markings: Parts supplied by PAVCSG (Panasonic AVC Networks Singapore) are indicated by "[M]" in the Remarks column.
- The list includes parts such as the Rear Cabinet Ass'y, Front Cabinet Ass'y, Terminal, Transit Wire, Spec Label, Leg Rubber, Screws, and the Woofer (EAS65P122B).

This structured approach ensures that service personnel can efficiently and safely perform maintenance, troubleshooting, and repairs on the SB-HC950P speaker system, maintaining its performance and longevity.