Tait TP9100 - Page 24

24 Description TP9100 Service Manual
© Tait Electronics Limited May 2005
Front-Panel Loom
The flexible front-panel loom 2! connects the front-panel loom connector
at the back of the main-shield assembly
2) and the front-panel interface
connector of the main board
2#.
The front-panel loom is folded twice and is long enough to fold the main-
shield assembly away from the main board.
The front-panel loom is labelled with the words “RADIO”, KEYPAD”,
and “OUTSIDE” to ensure correct orientation.
Main Board The main board 2# is a printed circuit board in SMT design with
components on the top and bottom sides. Most components are shielded by
metal cans.
There are different main boards for each frequency band.
The antenna SMA connector, the 16-way/3-way selector switch, and the
power/volume potentiometer are located at the top of the main board.
Important Special instructions must be followed when replacing the
non-SMT components at the top of the main board.
For more information refer to “Fitting the Non-SMT
Components” on page 118.
An emergency key tact switch and a status LED are located at the top of the
main board.
Tact switches for the PTT and function keys are located at the side of the
main board.
The front-panel interface connector, which is located at the bottom of the
main board, connects to the front-panel interface board of the main-shield
assembly
2) via the front-panel loom 2!.
The accessory connector, which is located at the top of the main board,
connects to the flexible accessory board
3@ at the back of the radio.
Two speaker contacts connect to two spring-loaded speaker pins on the
main board
2#. The speaker 1# is earthed by a flexible tab on the main-shield
assembly
2) which presses on the speaker.
Two spring-loaded speaker pins on the main board connect to the speaker
contacts.
Three spring-loaded battery pins on the main board protrude through the
chassis and connect to the battery contacts.
For more information on connectors and contacts, refer to “Connectors and
Contacts” on page 27.