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Troubleshooting 

Owner’s Manual

24

10. Troubleshooting   

Phenomenon  

Analysis  

Solution

Terminals cannot be 

powered on.   

The power cord is connected 

improperly.  

Connect the power cord correctly.   

An abnormal voltage is output from 

the vehicle battery.   

Check the battery strength.   

The power cord is damaged.   

Replace the power cord with a new 

one.  

The terminal and the remote control 

head are connected improperly (for 

mobile terminal (remote 

mounted)only).  

Replace the remote mounting cable 

with a new one and connect the 

terminal to the remote control head 

correctly.  

Network registration 

fails or network can 

not be found.   

The terminal is operating in DMO .   

Switch to TMO mode.   

The terminal is out of the network 

coverage in TMO.   

Check the signal strength. Make 

sure the terminal is within the 

network coverage.   

The terminal is not granted network 

access.  

Contact the network operator for the 

terminal authorization.   

Calls cannot be 

initiated.  

The terminal is out of the network 

coverage.  

Check the signal strength. Make 

sure the terminal is within the 

network coverage.   

The terminal operates in an improper 

mode.  

Check the operation mode. Make 

sure the terminal works in the right 

mode.  

A group call can not 

be sent or received.   

The terminal is not a member of the 

target group.   

Check whether the terminal is a 

member of the group. If not, contact 

your dealer to add the terminal to the 

group.  

Summary of Contents for MT680

Page 1: ...To derive optimum performance from the product please read this manual the corresponding TETRA Terminal Series Feature Book and the Safety Information Booklet carefully before use This manual is appl...

Page 2: ...leteness of this manual but no warranty of accuracy or reliability is given All the specifications and designs are subject to change without notice due to continuous technology development No part of...

Page 3: ...e standards and guidelines United States Federal Communications Commission Code of Federal Regulations 47CFR part 2 sub part J American National Standards Institute ANSI Institute of Electrical and El...

Page 4: ...following two conditions 1 This device may not cause harmful interference and 2 This device must accept any interference received including interference that may cause undesired operation Note Change...

Page 5: ...ation Steps 8 5 Status Indication 12 5 1 Status Icon 12 5 2 Operation Icon 13 5 3 LED Indicator 13 6 Menu Navigation 14 6 1 TMO Menu 15 6 2 DMO Menu 15 7 Basic Operations 16 7 1 Turning On Off 16 7 2...

Page 6: ...Group Call 21 8 2 3 Emergency Call 21 9 Message 22 9 1 Status Message 22 9 2 User Message 22 9 2 1 TMO 22 9 2 2 DMO 23 10 Troubleshooting 24 11 Care and Cleaning 27 12 Optional Accessories 27 13 Appen...

Page 7: ...mple click OK Bold The text in boldface denotes the name of a hardware button For example press the PTT key The symbol directs you to access a multi level menu For example to select New from the File...

Page 8: ...hat is both parties can transmit and receive at the same time Direct Mode Operation DMO DMO supports half duplex operation and allows the terminals to communicate directly with each other without usin...

Page 9: ...received If any item is missing or damaged please contact your dealer For Mobile Terminal Mobile Terminal Mounting Bracket Kit 1set Palm Microphone Fuse Power Cord Microphone Hanger and Screws Documen...

Page 10: ...er s Manual 4 Palm Microphone Fuse Power Cord Palm Hanger and Screws Documentation Kit Note The antenna frequency band is marked on the label of antenna if not refer to the label on the product for fr...

Page 11: ...Name 1 Microphone Programming Cable Connector 9 Numeric Keypad 2 Emergency Key 10 Answer Call Key 3 Volume Control Group Selector Knob 11 OK Key 4 LED Indicator 12 Options P3 Key 5 Navigation Key 13...

Page 12: ...Power Inlet 4 BNC Antenna Connector 3 3 Programmable Keys For enhanced convenience you can request your dealer to program the keys navigation keys numeric keys 1 9 key key and key as the shortcuts to...

Page 13: ...avoiding unexpected damage to other equipments in the vehicle due to overheating of the terminal that operates under high current z It is suggested to route the antennas and power cords in a concealed...

Page 14: ...r screws on the bottom chassis and remove the cover 2 Insert the SIM card properly into the holder Note Ensure that the waterproof ring is attached into the groove properly 3 Return the cover and fast...

Page 15: ...ted into the fuse holder on the power cord a Connect the power cord to the power supply with its black lead connected to the NEGATIVE pole and its red lead to the POSITIVE pole b Plug the other end of...

Page 16: ...gle mark on the microphone port with that above the microphone connector on the terminal Plug the microphone port into the connector with force Then rotate the cover of the microphone port clockwise t...

Page 17: ...head and the terminal See Illustration for Fixing the Mounting Bracket in Appendix Step 3 Connect the remote control head to the terminal with the remote mounting cable Step 4 Connect the accessories...

Page 18: ...e terminal is operating in fall back mode Profile Icons Silent Normal Accessory Icon The audio accessory is connected GPS Icon A GPS module is connected and the valid GPS data is received A GPS module...

Page 19: ...ication Icon Indication Function Menu Options Menu OK Operate View Search Back Save Restore Stop Play Pause Delete Cancel Answer End Send Call Type Modify Unlock GPS 5 3 LED Indicator LED Indication T...

Page 20: ...onfirm the options in the menu operate as follows in the home screen you can press the OK key or Function P1 key to enter the Function menu or press the Back key or Options P3 key to enter the Options...

Page 21: ...Owner s Manual Menu Navigation 15 6 1 TMO Menu 6 2 DMO Menu...

Page 22: ...save the settings and return to the former screen automatically 7 4 Inputting through Keypad You can use the numeric keypad to enter user alias and number edit messages etc The terminal supports thes...

Page 23: ...o Settings Security ChangePIN from the home screen and input the correct current PIN code prior to changing the code 7 7 Managing the Contacts 7 7 1 Contact List The contact list saves the information...

Page 24: ...PTT to initiate a half duplex call or press to initiate a full duplex call Note Entry of individual numbers must comply with the SSI TSI dialing rules See SSI TSI Dialing Rules in Appendix for more de...

Page 25: ...n press to terminate it 8 1 2 Group Call Initiating a Group Call In the home screen you can initiate a group call to the default group by pressing PTT To call other groups please do as follows Step 1...

Page 26: ...Individual Call in TMO 8 1 4 Emergency Call Initiating an Emergency Call Press the Emergency key and you can initiate an emergency call to the predefined contact Any individual contact group contact...

Page 27: ...ing Rules in Appendix for more details Answering an Individual Call You can receive an individual call in DMO automatically During the call you can hold down PTT to talk after the initiating party sto...

Page 28: ...e either an individual or a group as the target contact input the appropriate number and press OK to complete Long press the programmed Send StatusMsg key to send the preset status message directly Vi...

Page 29: ...ge s press the OK key to enter the Inbox and press OK again to read z In the home screen press the Function P1 key or OK key and navigate to Message Inbox Inbox Then you can view the unread message 9...

Page 30: ...network can not be found The terminal is operating in DMO Switch to TMO mode The terminal is out of the network coverage in TMO Check the signal strength Make sure the terminal is within the network...

Page 31: ...due to overloaded network Wait until the channel becomes available and try again Abnormal disconnection occurs during a call The terminal gets out of the network coverage in TMO Check the signal stren...

Page 32: ...tion The palm microphone is damaged Replace the microphone and connect the new one to the terminal correctly If the above solutions can not fix your problems or you may have some other queries please...

Page 33: ...ssory jack cover when the product is not in use Product Cleaning Caution Power off the product and disconnect the power supply before cleaning z Clean up the dust and fine particles on the product sur...

Page 34: ...8 digits z TSI Dialing MNC SSI 1 Input the MNC as it is 2 SSI must be 8 digits long Add 0 before the first digit of SSI which is shorter than 8 digits For example when MNC is 20 and SSI is 504 you ne...

Page 35: ...Owner s Manual Appendix 29 8QLW PP 8QLW PP...

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