Kenwood TK-280 Service Manual

Also see for TK-280: User manual Instruction manual Instruction manual Pricing and specification manual Service manual

TK-2805OPERATING FEATURES9) Group up/downWhen the key is pressed each time, the group number tobe selected is incremented/decremented and repeats if heldfor one second or longer. In Conventional format, this keyworks as the voice scrambler code selector in the voicescrambler code select mode.10) Home Channel (Conventional Format)Press this key once, the channel switches to the pre-programmed home channel.11) Home group (Trunking Format)Each pressing of the key selects a preset system/group.12) Key lockPressing this key causes the transceiver to accept entry ofonly the [Function], [Key Lock], [PTT], [Lamp], [Monitor A],[Monitor B], [Monitor C], [Monitor D], and [Emergency] keys.The locked keys also include the tuning control.13) LampThis key illuminates the LCD and keys on the front panel.When the key is pressed, the LED lamp goes on.When it is released, the lamp goes off after about fiveseconds. If any key is pressed while the LED lamp is on,the lamp is kept on for five seconds.14) MemoryThis key allows DTMF memory data to be recalled; up to 32memories each with a memory dial of up to 16 digitsand an A/N of up to 10 digits per memory.15) MonitorUsed to release signalling or squelch when operating as aconventional. It is also used to reset option signalling.16) Operator Selectable Tone (Conventional Format)This key switches the pre-set decode QT/DQT and encodeQT/DQT to OST (Operator Selectable Tone) tone pair.Press this key, the transceiver enters to OST select mode.In this mode, the display shows “OFF” and the operator canselect one of the OST tone pair using the tuning control.The display shows “TONE ∗∗” and tone pair No. ∗∗ isselected.Press OST key again, the transceiver exits from the OSTselect mode, and returns to the group/channel mode withthe handset indicator ( ) means that the OST tone pair isselected. OST tone pair number or OFF can be memorizedfor each channel.16 kinds of tone pair for OST can be programmed by KPG-49D. OST is useful to access the repeater with same radiofrequency and different tone (QT/DQT).17) RedialPressing this key when System/Group(trunking format),Group/Channel (Conventional Format) is shown, displays thepreviously transmitted DTMF code. Pressing [PTT] at this time,transmits the code that is currently displayed.18) RF power lowUsed to temporarily switch transmission output to low power.Turning the function on enables:Hi→Low, Low→LowKey states are backed up, except in the PC mode whenthey are reset.19) ScanPress this key starts scanning. Pressing this key stopsscanning.20) Scan Del/Add● Trunking FormatUsed to select whether system scan routines are used duringsystem scan. Each pressing of the key (to ON) togglesbetween lockout and lock. The scan routine is started whenon lock. The DEL indicator flashes when the system is onlockout.● Conventinal FormatThis key switches the currently displayed channel between“Delete” and “Add”.The “Add” channel contained in the scan sequence, and“Delete” channel is not contained. In the scan mode, thiskey switches the channel delete or add temporarily.21) Scan temporary delete (Trunking Format)This key is temporarily deleted a system being scanned. Ifyou press this key when scan is stopped (when a call isbeing received from another station), the system istemporarily deleted and scanning restarts.This key operates even when “Scan Type” is set to “ListType System Scan”.22) ScramblerIf a scrambler code (1 to 4) has been set in the FPU, anunderscore (“_”) appears at the extreme right of the LCDdisplay when scrambler is active. Pressing this key changesON/OFF of scramble operation.Holding this key down for 2 seconds sets Scramble CodeSelect Mode23) System up/down (Trunking Format)When the key is pressed each time, the system number tobe selected is incremented/decremented and repeats if heldfor one second or longer.24) Talk Around (Conventional Format)Press this key, the transceiver uses the receive frequencyand the tone for transmission.The operator can call the other party directory (withoutrepeater). Press this key again, the talk around function goesoff.