Block Diagram of Power & Charging (Version 5 Edit 94) for layout version 05 Original 11/97 Hands Free Unit HFU–2 HFU–2/A–1
Circuit Diagram of Audio (Version 5 Original 11/97 Hands Free Unit HFU–2 Edit 87) for layout version 05 HFU–2/A–2
Layout Diagram of ED2 Original 11/97 Hands Free Unit HFU–2 (Version 05) HFU–2/A–3
