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The TF-5 PWB, is called the "Junctionboard" (JB) and the TF-4 PWB, is called the "Engine-
board" (EB). The TF4 PWB is very similar to the NPL-1 (6310i) phone PWB and contains
the phone itself. The TF5 PWB is responsible for interfacing to the Display-Unit, the Input
device as well as to the car environment and the accessories. For this purpose there are
Through-Hole Connectors mounted on the TF5 PWB. Both PWBs are only single sided
populated. The exploded view of mechanical construction can be seen in Figure 1: View
of TFE-4/RV-1 RU.
The PWBs are contacted with three Board-to-Board connectors, two 8-pole connectors
and one 28-pole. Those connectors are soldered on the JB with spring connection to the
unpopulated side of the TF4 PWB. Additionally an RF-connector is transferring the RF
signal between TF-4 Engineboard and external Connector on Junctionboard.
Blockdiagram of Junctionboard
External
Connectors
HF-SPKR
Connector
Display
Connector
IGNS
HS/ID
Connector
HF-SPKR
Connector
HF-MIC
Connector
Dummy
Connector
Issue 2.0 Mar/2005
Company Confidential
VCAR
Powersupply
VCAR
Powercontrol
/
IBSI
Flashbus
B2BAUDIO
Mute
Vmic
VAudio
VEBpwr
Audio
Levelshift
CRM
er
Antenna Line
Figure 2: Block Diagram of the Junctionboard
Copyright © 2005 Nokia Corporation.
Company Confidential
TF5 Technical Information
VIDU
Flashbus
Vwake
B2BCRM
POWCTRL
Poweronx
UIMute
B2BAudio
VEBPWR
B2BCRM
TFE-4/RV-1
B2B
Connectors
B2B-
System
Connector
Power
connectors
Page 8a-9
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