Motorola Gp68 Part1 6881086c09 O Manual
Have a look at the manual Motorola Gp68 Part1 6881086c09 O Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 249 Motorola manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.
March, 19976881086C09-O4-11 GP68 Portable Radios Service ManualRadio Programming Information Special Programming Mode (SPM) A flashing channel number indicates that the channel is excluded from the scan list. A channel number that lights continuously indicates the channel is included in the scan list. For example, a display showing with flashing dig- its indicates that channel 18 is excluded from the scan list. Press the Enter Button to toggle the state of a channel in the scan list from included to excluded, or from excluded to included. A valid keypress tone sounds when the new set- ting is stored. To exit the scan list edit mode, select another menu item by turning the Channel Selector Knob. NOTE In a Full Serial Option Board Configured Radio, the Channel Scan List can be config- ured to exclude Full Serial Channels from the Scan List so that conventional channel scan can function correctly. Erase a Single Channel from Memory Rotate the Channel Selector Knob to select the menu item. Use the or the to scroll through the channels (01 to 20). A flashing channel number indicates that the particular chan- nel is unprogrammed (erased). For example, a display show- ing with flashing digits indicates that channel 10 is erased. To erase a programmed channel (non-flashing channel numbers), press the Enter Button. A valid keypress tone sounds when the channel has been successfully erased. NOTE Pressing the Enter Button for an unpro- grammed channel (flashing channel num- bers) results in an invalid keypress tone, and the keypress is ignored. To exit this edit mode, select another menu item by turn- ing the Channel Selector Knob. Edit Time Out Timer This menu item allows you to select the Time Out Timer length. Rotate the Channel Selector Knob to select the ‘Edit Time Out Timer’ menu item. The menu will display the current setting: , where xxx represents one of The default display of shows the time out timer setting of one minute. Use the or the to change the current status. Select another menu item by turning the Channel Selec-tor Knob to commit this new setting. Edit PTT ID Rotate the Channel Selector Knob to select the menu item. Press any key (except the Enter Button) to enter the PTT ID edit mode. The LCD displays the currently pro- grammed PTT ID. For an ID which exceeds the length of the 6-digit display, the rightmost digit flashes to indi- cate more digits exist on the right. You can now change or enter numbers as required, up to a maximum of 8, using any of the numeric keys, as well as the *, #, A, B, C, and D keys. The flashing cursor indicates the position of the next digit to be entered. You can also enter a 3 4 1 2 MEM 3 Figure 4-21Special Programming Mode Options. *Edit Group Call ID Erase Single Channel Edit Phone Access Code *Edit Individual Call ID Edit Phone De-access Code Edit PTT ID *Edit Acknowledgment ID§Set SelCall Tone Status Set Alert Tone Volume Set Battery Saver Status Set Accessory Option Set Battery Type Set Sidetone Status (Clockwise Rotation) (Counter-Clockwise Rotation) * Only displays with optional DTMF Decoder board selected.§Only displays with option board selected. FIRST ITEM *Edit All Call ID “Beep” Edit Channel Scan List Edit Time Out Timerxxx††xxx represents ,,,...,. 4 1 xxx ,,,...,. 2MEM 3 1 2
4-126881086C09-OMarch, 1997 Radio Programming InformationGP68 Portable Radios Service Manual Special Programming Mode (SPM) pause between the digits of the ID by first pressing , immediately followed by . However, any pauses entered at the end of the ID are not stored. Two medium-pitched “beeps” sound when a pause is successfully entered, and the display changes from ‘A’ to ‘–‘ to visually represent the pause Use or to scroll through the existing ID’s digits. To change the PTT ID, use to erase the unwanted digits, and then enter the new digits. The dis- play shows the new digits as they are being entered. When the flashing cursor is under a digit, the maximum number has been entered. If you attempt to add more than 8 digits, an invalid keypress tone sounds and the keypress is ignored. Press the Enter Button to store the new PTT ID and return to the SPM browse menu. A valid keypress tone sounds when the ID has been successfully stored. To abort the data entry, select another menu item by turning the Channel Selector Knob, or wait until the edit mode times-out (after 5 seconds of inactivity). Edit Selective Call IDs NOTE To support Selective Call o operation, the Option Board Setting must be set to ‘dECOdE’ for Simple Decoder in order to access the ID parameters. Rotate the Channel Selector Knob to select the appro- priate menu item ( = Acknowledgment ID, = Individual Call ID, = Group Call ID and = All Call ID). Press any key (except the Enter Button) to enter the appropriate edit mode. The LCD Screen displays the currently programmed ID number. For an ID which exceeds the length of the 6-digit display, the rightmost digit flashes to indicate more digits exist on the right. You can now enter or change digits as required, up to a max- imum of 8, using any of the numeric keys, as well as the *, #, A, B, C, and D keys. The flashing cursor indicates the position of the next digit to be entered. NOTE Pause digits cannot be entered with Selective Call ID numbers. Therefore, a ‘*’ must not be immediately followed by a ‘#’, but they are valid in combination with all other digits. Use or to scroll through the existing ID’sdigits. To change the selected ID, use to erase the unwanted digits, and then enter the new digits. The dis- play shows the new digits as they are being entered. When the flashing cursor is under a digit, the maximum number of digits has been entered. If you attempt to add more than 8 digits, an invalid keypress tone sounds and the keypress is ignored. Press the Enter Button to store the ID number and return to the SPM browse menu. A valid keypress tone sounds when the ID has been successfully stored. To abort the data entry, select another menu item by turning the Channel Selector Knob, or wait until the edit mode times-out (after 5 seconds of inactivity). Factory Reset Feature This feature is intended to allow you to erase certain pro- grammable parameters and restore the radio to the factory default settings. The radio, upon reset, clears all memory channels stored in the non-volatile memory area, clears all phone number storage locations, and restores the default set- tings to the different user-modifiable parameters (coded squelch type, squelch level, channel-step size, etc.). NOTE The Factory Reset feature does not clear the IDs or access/de-access codes, nor does it change the Option Board Setup setting. With the radio in Special Programming Mode, press and hold the PTT Button. While holding PTT, press , , , , in sequence. As the sequence is entered, the LCD Screen (which is ini- tially cleared) displays an’o’ for each digit entered. Any incorrect digit entered results in an invalid keypress tone, the LCD Screen is cleared again and you must reenter the sequence, starting with the first digit. Once the sequence has been entered successfully, the LCD Screen displays the prompt , indicating that the reset procedure is ready to be activated. Press the Enter Button to confirm the reset process. Pressing any other key or releasing the PTT Button cancels the process and returns the radio to the SPM Browse menu. The display blanks when the reset is in progress. When the process is successfully completed, the LCD Screen displays and a ringing reset tone sequence sounds. 3MEM 4a 4b 1 2 3MEM 4a 4b 1 213579 3
March, 1997 6881086C09-O 5-1 Section 5 Troubleshooting Overview This section contains five troubleshooting tables for the following components: ¥ Receiver • Transmitter • Synthesizer • Microprocessor • Voltage Controlled Oscillator (VCO) • LCD Troubleshooting Charts Refer to following pages. Troubleshooting and Repair Comments While troubleshooting, if you determine that the reference oscillator crystal (Y201) is defective, the entire Radio Frequency (RF) board must be replaced. When the new Radio Frequency board is installed, the eight-digit oscillator temperature compen- sation code, supplied with the new RF board, must be programmed into the radio controller. See the Radio Service Software (RSS) manual, number 6881086C08 (in English), section 5.3.3. Simply enter the eight-digit code in to the box on the RSS Ref- erence Oscillator data program using the F8 key on your computer. Keep the new oscillator compensation code in your records.
5-2 6881086C09-OMarch, 1997 TroubleshootingGP68 Portable Radios Service Manual Troubleshooting Charts Troubleshooting Flow Chart for Receiver Start Very low or no 12 dB SINAD Noise at spkr when radio is unsqu’d? Is 1st LO at U41 pin 3 > 2 dBm? Inject on channel signal at RF port, U41 pin 1 Is 12 dB SINAD -110 dBm? Inject 45.1 MHz signal at U41 pin 4 Is 12 dBS -117 dBm? Inject a 45.1 MHz signal at C59 Is 12 dBS -110 dBm? 1Check IFIC U51 (see below) Noise at pin 23 of IFIC U51? Check VCO/Synth Inject on channel signal at C148 Check harmonic filter and antenna path Check external components connected to IFIC. If OK, replace U51 Check mixer, U41 Is Q51 biased correctly? Check XTAL filter Y51Check +5vRX and IF amp components Is 12 dBS -116 dBm? Check AFIC Is Q1 biased properly? Check 2-pole and 3-pole filters’ componentsCheck +5vRX and Q1 bias circuitry 1 Is 2nd LO on freq? Check VDC of all IFIC pinsAre VDC of pins 7,9, and 10 of IFIC OK? Are voltages on pins OK?Check 2nd LO XTAL and components Check IFIC (see below) Check external components connected to IFIC NO NO YES YES NOYES YES NO YESNO YES YESNO YESNO NO YESYESNO YES YES NO NONO
March, 19976881086C09-O 5-3 GP68 Portable Radios Service ManualTroubleshooting Troubleshooting Charts Troubleshooting Flow Chart for Transmitter Start No Power Is +5vTX and TXB+ OK? Is current OK? Is VCTL High or Low? Check Pin to Q101 Is Pin OK? Check U303, Q152 & U151 Check Voltages in Power Control Circuit Check Voltages in PA Line-upTroubleshoot VCO DoneIs Power OK? 1. Check Pin Diodes 2. Check Harmonic Filter Inspect/Repair TX Output Network NO NO LOW HIGH YES NO NO YESYESYES NOTE When using the (81-80377E77) housing elimi- nator for Level III analysis, the power level needs to be set at “minimum” on the power level setting to avoid any damage to the radio. This can be performed by either the STS (RVN- 4159A) transmit power tuning field, or by the low power setting on the radio keypad. The transmitter alignment procedures cannot be per- formed with the housing eliminator.
5-4 6881086C09-OMarch, 1997 TroubleshootingGP68 Portable Radios Service Manual Troubleshooting Charts Is information from mP U401 correct? Is U201 Pin 18 AT4.65 VDC? Is U201 Pin 32 AT = 13 VDC Is U201 Pin 1 4.3 VDC in TX? Troubleshooting Flow Chart for Synthesizer Start Visual check of the Board OK?Correct Problem Check 5V Regulator +5V at U201 Pin’s 3,12,19,22 & 23?Is 16.8MHz Signal at U201 Pin 14?Check Y201,C205,C206,C211 R207 and CR203 Are signals at Pin’s 9 & 10 of U201? Check C202, C203,C204,C231, CR201 & CR202Fix Connection Is Connection between U201 Pin 1 & U251 Pin 5 OK? Replace U201 Remove Shorts Is there a short between Pin 32 and Pins 9 & 10 of U201? If line between U201 Pin 18 & U251 Pin 3 is OK, then replace U201 Replace or resolder necessary components Is RF level at U201 Pin 20 between -10 & +5 dBm? Are R202,R204, R205,C214,C215, C216 & L201 OK? Replace U201 If L203,C224,C226 & C227 and runners between U201 Pin 20 & U251 Pin 23 are OK, then see VCO troubleshooting chart Are Waveforms at Pins 9 & 10 triangular? Do Pins 5,6 & 7 of U201 toggle when channel is changed? Check programming lines between U401 and U201 Pins 5,6 & 7 Replace U201 Check uP U401 Troubleshooting Chart NO YES NO YES NO NO NO YESYESNO NO YES YES NOYES YESNO YES YES YESNO NO NO NO YES NO YES YES
March, 19976881086C09-O
5-5
GP68 Portable Radios Service ManualTroubleshooting
Troubleshooting Charts
Troubleshooting Flow Chart
for Microcontroller
START
APPLY POWER TO RADIO AND
WAS GOOD OR BAD POWER-ON
YES
DONE WAS GOOD POWER-ON BEEP ARE ALERT TONES
ENABLED IN SPM
USE SPM TO ENABLE TONES
INVOKE FACTORY
RESET IN SPM
WAS GOOD POWER
ON BEEP PRESENT
MAIN RADIO BOARDS MUST BE
REPLACED
ARE TONES PRESENT
ON POWER UP AT
U402 PIN 23?
AUDIO PROBLEM, TROUBLE-
SHOOT AUDIO CKT WITH POWER CONNECTED TO RADIO AND THE RADIO TURNED
ON CHECK THE FOLLOWING:
1) 5V AT PIN 32 OF U401. IF NONE CHECK U411.
2) WITH HIGH IMPEDANCE PROBE CHECK FOR 7.9488MHZ AT
PIN 7 AND 10 OF U401, IF NO SIGNAL CHECK/REPLACE
L401/Q401.
3) CHECK DC AT PIN 19 OF U401. IF < 4.5VDC CHECK U402
PIN 25 FOR 2.1 MHZ SIGNAL.
4) CHECK FOR TYPICAL VOLTAGES OF U401 AND U402
VOLTAGES.
BEEP PRESENT TURN ON
PRESENT
DONE
DONE
DONE
YES YES
YES
YES
YES
NO/DONÕT
KNOWNO
NO
NO
NO(RF & CONTROLLER)
NOTE: U401 is not replaceable. If U401 is damaged, the controller and
RF boards both need to be replaced.
5-6 6881086C09-OMarch, 1997 TroubleshootingGP68 Portable Radios Service Manual Troubleshooting Charts 4.3 VDC at U251 Pin 5? 4.65 VDC at U251 Pin 13? =151 mVrms at “+” Side of C217? 4.65 VDC at CR252? 0.01 VDC at U251 Pin 17? Are U251 Pin’s 4 at 3.9VDC, 19 at 2.1VDC, 16 at 0.9VDC, 15 at 1.7VDC, 14 at 1.4 VDC? Is the Radio UHF? Is +5vRX at 5V? Is Q251 Drawing =4mA Is 5 VDC at Collector of Q251? Are U251 Pin’s 2 at 4.2VDC, 7 at 2.1VDC, 10 at 0.8VDC, 11 at 1.6VDC, 12 at 1.2 VDC? 0.01 VDC at U251 Pin 9? 0.7 VDC at U251 Pin 5? 4.65 VDC at U251 Pin 13? Troubleshooting Flow Chart for VCO Low or no Power at Pin 3 of Mixer VisualCheck of Board OK? If all parts around Q251 are OK, then replace Q251 Replace L269 Fix the Circuitry for +5VRX If all parts from U251 Pin 2 to Pin 3 of mixer are OK, then replace U251 If all parts associated with those Pin’s are OK, then replace U251 If all parts from U251 Pin 4 to Input of PA are OK, then replace U251 If C256 and R253 are OK, then replace CR252 Replace R252 or L255 Replace C217 Low or no power at Input to PA Visual check of Board OK?Correct Problem Make sure Synthesizer is working correctly and runner between U201 Pin 18 and U251 Pin 13 is OK Check runner between U201 Pin 1 and U251 Pin 5 Replace L251Replace L258 NO YES NO YES NO YES NO YES NO YESNO YES NO YES NO YES NO YESYES NO YES NOYES NONOYES NO NO YES NO YES RX VCOTX VCO Power OK but no Modulation
March, 19976881086C09-O 5-7 GP68 Portable Radios Service ManualTroubleshooting Troubleshooting Charts Troubleshooting Flow Chart for Display Boar d START DONE APPLY POWER TO RADIO AND TURN ON KEYPAD WORKING? BACK LIGHT WORKING? CONNECTION OK?FIX J801 CONNECTION CHANGE LCD BOARD CONNECTION OK? CLOCK WORKING? R811, R812, R813, R816, R817 WORKING?R814, R815, C801 WORKING? COMPLETE DISPLAY CHANGE BAD COMPONENTS CHANGE BAD COMPONENTS LEDS WORKING? R801, R802, R803 WORKING? Q801 WORKING? CHANGE U801 CHANGE BAD COMPONENTS CHANGE LEDS CHANGE Q801 CHANGE LCD BOARD YES NO YES YES YESYES YES YES YES YESYES NONO NO NONO NO NO NOYES NONO J801 J801
5-8 6881086C09-OMarch, 1997 TroubleshootingGP68 Portable Radios Service Manual