Programmes After Market Services (PAMS) Technical Documentation NHB–3 Series Transceiver Chapter 3 TRANSCEIVER OVERVIEW
PAMS Technical Documentation NHB–3 Transceiver CHAPTER 3 – TRANSCEIVER OVERVIEW Contents Page No Transceiver Introduction Basic Construction Interconnection Diagram Functional Description Circuit Description Block Diagram Power Distribution Exploded View of NHB–3NB and NHB–3ND Assembly Parts of NHB–3NB and NHB–3ND Original 26/97 3–3 3–3 3–3 3–4 3–5 3–5 3–5 3–6 3–7 3–8 Page 3–2
PAMS Technical Documentation NHB–3 Transceiver Transceiver 3C 0500225 expl. view of NHC–3XN 6E 0260349 ass. parts of NHC–3XN 3C 0500226 expl. view of NHC–3AA 6E 0260350 ass. parts of NHC–3AA 3C 0500227 expl. view of NHC–3XB 6E 0260351 ass.
PAMS Technical Documentation NHB–3 Transceiver Interconnection Diagram MIC 2 UIM Display 5 24 2 UI MODULE 2 EARPIECE BUZZER 30 RADIO MODULE 16 2+2 SYSTEM CHARGER CONNECTOR Original 26/97 4 BATTERY 1 ANTENNA Page 3–4
PAMS Technical Documentation NHB–3 Transceiver Functional Description Circuit Description The transceiver electronics consist of the Radio Module (RF + System blocks) and the UIF Module. The UIF Module is connected to the Radio Module with a connector. System blocks and RF blocks are interconnected with PCB wiring. The Transceiver is connected to accessories via a bottom system connector with charging and accessory control.
PAMS Technical Documentation NHB–3 Transceiver Power Distribution The power supply is based on the ASIC circuit PSL+ for a baseband circuitry and on CRFCONT for RF. PSL+ consists of regulators and control circuits providing functions like power up, reset and watchdog. External buffering is required to provide more current. CRFCONT consists of eight separate regulators.
PAMS Technical Documentation NHB–3 Transceiver Exploded View of NHB–3NB Original 26/97 Page 3–7
PAMS Technical Documentation NHB–3 Transceiver Assembly Parts of NHB–3NB ITEM 1 1 2 5 6 7 8 9 10 12 13 14 15 16 17 T1 T2 Q’TY 6 6 Original 26/97 CODE DESCRIPTION VALUE, TYPE 9450269 9457376 9457079 9790055 9790062 9790154 9450656 9510299 9380115 6291662 9450434 6290060 9450230 0660111 9510286 0200819 0200943 A cover A cover Window Sidekeymat Power keymat Keypad A shield B shield Continuous sheet PT screw B cover PT screw SIM cover Antenna Edge clip UIF module DU8C System module DB6 2D 24116 (NHB–
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