A great copy of the manual, and the only one I could find anywhere on the net! The circuit diagrams are easily readable, all component values marked and easy to see. A highly appreciated download!
Text excerpt from page 1 (click to view)
TF-HF30(J)/TF-HF30-NK(J)
SERVICE MANUAL
HANDS FREE KIT FOR MOBILE PHONES
TF-HF30(J)/TF-HF30-NK(J)
The "Product Exchange System" is applicable to this product. For limited spare parts, refer to the parts list.
TF-HF30(J)
TF-HF30-NK(J)
Specifications
Earphone section Type Nominal impedance Sensitivity Max.input capability Cord length Mass Moving coil 32 ohms 95 dB/1 mW 30 mW 1.2 m (3.94 ft) with 2.5mm triple-pole plug 18g (0.63 oz) without cord 29g (1.02 oz) with cord Microphone section Type Directivity Sensitivity Accessory Electrical condenser Non-directional -60 dB(0dB=1V/0.5Pa) Plug adaptor for Nokia (for NK model only)
Design and specifications subject to change without notice.