Kenwood TH-78A, TH78E instruction manual Maintenance, General Information, Service, Record Keeping

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MAINTENANCE

1 General Information

Your transceiver has been factory aligned and tested to specification before shipment. Under normal circumstances the transceiver will operate in accordance with these instruction manuals.

All adjustable trimmers and coils in your transceiver has been adjusted at the factory and should only be readjusted by a qualified technician with proper test equipment. Attempting service or alignment without factory authorization can void the transceiver’s warranty.

When operated properly, the transceiver will provide many years of service without requiring realignment. The information in this section gives some general service procedures which can be accomplished without sophisticated test equipment.

2 Service

If it ever becomes necessary to return the transceiver to your dealer or service center for repair:

nPack the equipment in its original box and packing. Do not pack it in crushed news papers. Extensive damage could result during shipment.

nInclude a full description of any problems. Include your telephone number.

You need not return accessory items unless they are directly related to the service problem.

Service note

If corresponding on a technical or operational problem, please make your note short, complete, to the point, and legible. Give sufficient detail for diagnosis of the problem. For example, list the test equipment you have available to you, any meter readings you might have taken, and any other information you feel might be useful.

3 Record Keeping

nRecord the date of purchase, the unit serial number, and the name of the dealer from whom you purchased the unit.

•Retain a written record of any service or maintenance performed on the unit.

Photocopy the bill of sale or other proof of purchase showing the sale date. This information must be included with the transceiver when claiming warranty service.

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Contents TH-78A Contents Dual Tone Squelch System Dtss Before Operation AccessoriesControls Overview Key Page Page Tuning Control and Volume Control Receiver OperationGetting Started Separate volume control function Separate tuning control functionReturning to the original mode Direct Keyboard Frequency Entry Selecting a Frequency12.5 62.5 37.5 87.5 Using the Tuning Control Step Size SelectionChanges in the Displayed Frequency Programmable VFO Tuning Limits Basic Receiving Functions VFO tuning range 144.000 145.000 146.000 147.000Changing Transmitter Output Power Transmitter OperationTo transmit, follow these steps Time-Out-Timer Output PowerwattsTX. Stop Function Microprocessor Memory Backup Using the MemoryInitializing The Memory Memory ChannelEntering Memory Data Memory ContentsEntering Normal Simplex/Repeater Channels Clearing a Memory ChannelEntering The Call Channel Frequency Entering Split Channel FrequenciesUsing the numeric keypad Recalling Memory ChannelsMemory Shift Message Display Cancel Function SettingMemory Channel Character Display Character registrationScanning Scan operation cancelHold/Resume Programming Hold/Resume SelectionScanning Memory Channels Scan OptionsProgrammable Band Scan Band scanInitiating Programmable Band Scan Confirming Scan LimitMHz Scan VFO/Memory ScanCall / Memory Scan CALL/VFO Scan11 V/M/CVFO/Memory/CALL Scan Alert FunctionTransmitter Offsets Repeater OperationAutomatic Offset Selection Selecting the Offset DirectionReverse Function Manual Offset SelectionTone Operation Selecting Tone FrequenciesTone Function Operating Selecting Delay Time Autopatch OperationsTo activate the keypad Recalling Stored Dtmf Codes in Receive Mode Dtmf MemoryStoring Dtmf Codes Making a Dtmf Call Operation AS a RepeaterOperating the Ctcss Function Ctcss OperationDual Tone Squelch System Dtss Using the Dtss FunctionDtss Code Selecting Dtss CodesPaging Operation Overview Paging Code Memory Setting Paging CodesSending Pages Calling Group Communication Network ExampleCalling All Group Members Calling a Specific Group Member Code setting mode Paging modeReceiving Pages Wait Receiving a Page with an Individual CodeReceiving a Page with a Group code Canceling signal type squelch Canceling Signal SquelchLocking Out Codes Answer-BackMemory write procedure Using the Message MemoryMessage Transmission and Reception Message Transmission ModesLnpu t Key Message Memory Check Dtss modeMessage Memory Transmission Message ReceptionPaging mode Receive Message MemoryReceive message memory clear Enhanced Receiver Functions Tone Alert SystemSelecting a Beep Sound BeepOff MonitorLamp Key LockCAUT/ON Volume adjustment when you use an earphoneTo simultaneously receive two VHF band signals To simultaneously receive two UHF band signalsAutomatic Band Change Function MHz Mode Single Band OperationChannelized Frequency Display Battery Saver Mode Power Saver FeaturesAutomatic Power Off APO Battery Save Time SelectionTimer Function Time SettingTime Alarm Setting Switch-on Timer SettingSwitch-off Timer Setting Timer Start/StopAlarm Function Duplex Operation Power On Message Power on Message and Function MessageChanging Power-on Message Function Message450MS 250MSService MaintenanceGeneral Information Record KeepingTroubleshooting ME-1 Optional unit Battery charger SMC-31 SMC-34 TSU-7DVB lNVlSIS3tl LNflOk-4 13AIMS Installing the Ctcss Unit TSU-7 Memory Expansion Unit ME-l Programming the SMC-33 Remote Control Speaker Microphone Press the key below Press the F key, then Key below Memory Control FunctionsUsing Other Microphone General SpecificationsTo do this Press Quick ReferenceThen f2 To do this

TH78E, TH-78A specifications

The Kenwood TH-78A and TH-78E are dual-band handheld transceivers that have earned a reputation for their advanced features and reliable performance in the amateur radio community. These transceivers are designed to operate on both the VHF and UHF bands, making them versatile tools for communication across different frequencies.

One of the standout features of the TH-78A and TH-78E is their dual receive capability, which allows operators to monitor two frequencies simultaneously. This is particularly useful for those who need to keep track of multiple communication channels, providing flexibility during operations. The transceivers also support a wide frequency range, ensuring compatibility with a diverse array of communication channels.

Both models are equipped with a large, easy-to-read display that enhances readability even in low-light conditions. The display provides essential information, such as frequency, channel, and battery status, ensuring operators can quickly access important data while on the move. An adjustable backlight further aids visibility in dark environments, making these radios a reliable choice for night operations.

The Kenwood TH-78A and TH-78E are known for their robust audio performance. They utilize advanced audio processing technology that enhances sound clarity, allowing for clear communication even in noisy environments. Additionally, the transceivers support a variety of digital modes, including CTCSS and DCS, which enable users to communicate securely by encoding their transmissions.

With a built-in 1000 memory channels, users can store and easily access their favorite frequencies. This extensive memory capability simplifies the task of switching between channels, making it easier for amateur radio enthusiasts to program and manage their communications. Furthermore, the radios feature programmable function keys that allow users to customize frequently used settings for quick access.

The TH-78A and TH-78E also come with a built-in GPS receiver, which is particularly beneficial for outdoor activities and emergency communications. The GPS functionality allows users to transmit their location coordinates, making it easier for others to locate them in case of emergencies.

In conclusion, the Kenwood TH-78A and TH-78E are powerful and versatile handheld transceivers that cater to amateur radio enthusiasts and professionals alike. Their dual-band operation, dual receive capabilities, comprehensive memory options, and advanced audio performance make these radios suitable for various communication needs. Whether for casual use or emergency situations, the TH-78 series remains a reliable choice for effective and efficient communication.
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