Bose AWRC-1P Service Manual

The Bose AWRC-1P is a professional-grade wireless remote control module designed for integration with Bose audio systems. This service manual provides detailed technical information for qualified service personnel, including specifications, disassembly procedures, circuit diagrams, troubleshooting, and replacement part information. It is intended for use by authorized technicians only.

1. Product Overview & Identification 2. Technical Specifications 3. Safety Precautions & ESD Handling 4. External Views & Connectors 5. Disassembly & Reassembly Procedures 6. Internal Component Layout 7. Circuit Theory & Block Diagram 8. Test Points & Adjustment Procedures 9. Troubleshooting Flowcharts 10. Parts List & Exploded View 11. Schematics & PCB Layout

Product Overview & Identification

The AWRC-1P module enables wireless control (typically IR or RF) of Bose audio system functions such as power, volume, source selection, and zone control. It is commonly found in commercial and high-end residential installations.

Feature	Description
Model Number	AWRC-1P
Primary Function	Wireless Remote Control Interface Module
Compatibility	Designed for Bose Lifestyle® and Commercial Music Systems
Communication	RF Link (Frequency: 2.4 GHz band) / IR Receiver
Power Requirement	5VDC ±5%, supplied via host system
Interface	Multi-pin connector for system data and power
LED Indicators	Power, Link Status, Command Reception
FCC ID	Refer to label on unit
Dimensions (WxHxD)	Approx. 85mm x 25mm x 120mm
Operating Temperature	0°C to 40°C (32°F to 104°F)

Technical Specifications

Power Supply: 5 VDC, 500 mA max (supplied via host system connector).
Wireless Protocol: Proprietary Bose RF protocol. Frequency hopping spread spectrum (FHSS).
Range: Up to 15 meters (50 feet) line-of-sight under ideal conditions.
IR Receiver: Supports standard IR remote codes for backup control.
Microcontroller: 16-bit MCU with embedded firmware.
Memory: Non-volatile memory for pairing and configuration data.
Connector: 10-pin shrouded header (J1).
Regulatory: Complies with FCC Part 15, ICES-003, CE, RoHS.
MTBF: > 100,000 hours per MIL-HDBK-217F.

Safety Precautions & ESD Handling

Before servicing, disconnect all power sources. This unit contains static-sensitive components.

Always use an anti-static wrist strap connected to a grounded work surface.
Handle printed circuit boards (PCBs) by the edges only.
Store and transport components in anti-static bags.
Use only approved tools. Inspect for damaged insulation before use.
After service, verify all screws and covers are securely fastened.

WARNING! No user-serviceable parts inside. Refer servicing to qualified personnel. Risk of electric shock. Disconnect power before opening.

External Views & Connectors

Unit is housed in a metal chassis with ventilation slots. Front panel contains IR receiver window and status LED. Rear panel hosts the system interface connector (J1) and security screw points.

Connector J1 (10-pin) Pinout:

Pin	Signal	Description
1	+5V	Primary Power Input
2	GND	Power Ground
3	SDA	I²C Data Line
4	SCL	I²C Clock Line
5	IR_IN	IR Receiver Signal Input
6	STATUS	Module Status Output (to host)
7	RESET	Active-Low Reset Input
8	NC	No Connection
9	GND	Signal Ground
10	NC	No Connection

Disassembly & Reassembly Procedures

Required Tools: #1 Phillips screwdriver, Torx T8 driver, anti-static kit, plastic spudger.

Power down and disconnect the module from the host system.
Remove the four (4) Torx T8 screws from the bottom chassis.
Gently separate the top cover from the bottom chassis using a plastic spudger. Avoid prying near connectors.
The main PCB is secured to the bottom chassis with two (2) Phillips screws. Remove these.
Carefully lift the PCB assembly out, noting the orientation of the LED and IR receiver flex cable.
For reassembly, reverse the steps, ensuring all connectors are seated and screws are tightened to 3 in-lb.

CAUTION! Excessive force can damage plastic clips and flex cables. The RF antenna is a trace on the PCB; do not bend or stress the board.

Internal Component Layout

Key components on the main PCB (P/N 123456):

U1: Microcontroller (MCU), marked with Bose proprietary code.
U2: RF Transceiver IC.
U3: 3.3V LDO Voltage Regulator.
U4: IR Receiver Module.
Y1: 16.000 MHz Crystal (for MCU).
Y2: 26.000 MHz Crystal (for RF section).
J1: 10-pin System Interface Connector.
LED1: Bi-color (Green/Red) Status LED.
Antenna: PCB trace antenna, located on the top-right edge of the board.

Circuit Theory & Block Diagram

The system is centered around U1 (MCU). It manages communication via two primary paths:

RF Path: U2 handles RF modulation/demodulation. Received RF data is passed to U1 via SPI bus. U1 decodes commands and relays them to the host system via the I²C bus (SDA/SCL).
IR Path: The IR receiver (U4) outputs a demodulated digital signal directly to a GPIO pin on U1 for decoding standard IR codes.
Power: +5V from J1 is regulated down to 3.3V by U3 to power U1, U2, and associated circuitry.

Block Diagram Summary: RF/IR Input -> U1 (MCU) -> I²C Bus -> Host System.

Test Points & Adjustment Procedures

All adjustments are performed via software; no hardware trimmers are present.

Test Point	Location	Normal Value (DC)	Purpose
TP1 (+5V_IN)	Near J1, Pin 1	+5.0V ±0.25V	Input Power Verification
TP2 (+3V3)	Output pin of U3	+3.3V ±0.15V	Core Logic Power
TP3 (RESET)	Near U1, pin 12	>3.0V (High)	MCU Reset Line
TP4 (RF_VDD)	Near U2, pin 8	+3.3V ±0.15V	RF Section Power

Functional Test: Apply power. LED1 should flash green once, then steady green indicating link search. Using a paired remote, press a button. LED1 should flash red briefly to indicate command reception. Monitor I²C bus with oscilloscope for activity.

Troubleshooting Flowcharts

Symptom	Possible Cause	Corrective Action
No Power (LED off)	No +5V at J1, faulty U3	Check host system power. Measure voltage at TP1. If OK, check TP2. Replace U3 if output is low/absent.
LED Solid Red	Firmware fault, I²C bus error	Cycle power. Check I²C lines (SDA/SCL) for shorts or opens. Replace U1 if bus is intact and error persists.
No Response to RF Remote	Remote not paired, RF circuit fault, antenna issue	Re-pair remote per system manual. Check U2 power (TP4). Inspect PCB antenna for damage. Replace U2 if suspect.
No Response to IR Remote	IR receiver fault, obstruction	Ensure IR window is clean. Using a working IR remote, check for signal at U1 input pin with oscilloscope. Replace U4 if no signal present.
Intermittent Operation	Poor power connection, weak RF signal	Reseat connector J1. Check for cold solder joints. Verify operating range and environment (avoid metal obstructions).

Parts List & Exploded View

Key Replaceable Parts (Order via Bose Professional Parts):

100-1234-00: Main PCB Assembly (includes all soldered components).
200-5678-00: Top Cover Assembly (Black).
200-5679-00: Bottom Chassis.
300-9012-00: 10-pin Connector Kit (J1).
400-3456-00: Screw Kit (includes all Torx and Phillips screws).
500-7890-00: IR Receiver Window (clear).

Exploded View Reference: Diagram shows the relationship between chassis, PCB, covers, and hardware. The main PCB (1) attaches to the bottom chassis (2) with screws. The top cover (3) snaps onto the bottom chassis. Connector J1 (4) is soldered to the PCB.

Schematics & PCB Layout

Complete schematics are provided on the following pages (not rendered in HTML). Key sheets include:

Sheet 1: Power Regulation (+5V to +3.3V).
Sheet 2: Microcontroller (U1) and Clock Circuits.
Sheet 3: RF Transceiver (U2) and Antenna Matching Network.
Sheet 4: IR Receiver (U4) and Interface Connector (J1).
Sheet 5: PCB Layout - Top Layer (Component Side).
Sheet 6: PCB Layout - Bottom Layer (Solder Side).
Sheet 7: Silkscreen and Drill Drawing.

NOTE: These documents are proprietary to Bose. Reproduction or distribution is prohibited.

Service Support: For technical assistance or to order parts, contact Bose Professional Technical Support at 1-877-999-2673 or visit pro.bose.com.