Midland 70-1545 Service Manual Download Page 8 | Manualshive

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1.1.5 INITIAL INSPECTION

When you receive your radio, inspect the carton for any signs of shipping damage.

Report any damage

to the carrier immediately

. Then remove and check the contents to be sure all items have been included.

1.1.6 STANDARD PACKAGE

TAG

Part name

Part No.

Qty.

1

Transceiver

KG208-xxxxxx

1

See listing at right and drawing below.

2

Hand Microphone

KD-559

1

3

Hang-up clip screw

99-40-0204-1214

3

4

Hang-up clip washer

99-47-1104-23

3

5

Hang-up clip

14-11-64-01

1

1.1.7 OPTIONAL ITEMS

6

Mounting bracket

2A10-0164

1

7

Mounting

screw

STB-5 x 15

4

Check your order or packing list for the items

8

Flat washer

FW-5PAI

4

to be supplied.

9

Battery cable

SCN-14-BC

1

10

Spare

fuses

MINI-12.5A

2

STANDARD PACKAGE CONTENTS

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Summary of Contents for 70-1545

Page 1: ...Model 70 1545 Mobile Transceiver SERVICE MANUAL 6KEN SOFTWARE VERSION Manual KW208SM 6KEN ...

Page 2: ...15B 146 174 MHz KG208 20A 176 208 MHz KG208 20B 208 245 MHz KG208 20C 240 276 MHz KG208 40SA 300 335 MHz KG208 40A 335 365 MHz KG208 40B 365 400 MHz KG208 40C 400 435 MHz KG208 40DS 420 455 MHz KG208 40D 440 475 MHz KG208 40E 465 500 MHz KG208 40F 485 520 MHz The KG208 03 30 50 MHz band will be covered in an addendum to this manual ...

Page 3: ...ON 2 INSTALLATION 9 SECTION 3 OPERATION 11 Control Functions Control panel Drawing 11 Display ICONS 12 Operating the Radio 13 Advanced Features 15 Special Keypad Functions 17 SECTION 4 CIRCUIT DESCRIPTION 20 Operating Voltage Control 20 Receiver 20 Transmitter 22 PLL 23 Logic Unit 23 Control Unit 23 SECTION 5 SERVICING INFORMATION 25 Test Equipment and Tools 25 Tuning and Adjustments 25 Disassembl...

Page 4: ...IT SCHEMATIC 176 276 MHZ 38 MAIN UNIT SCHEMATIC 300 520 MHZ 39 CONTROL UNIT SCHEMATIC 40 CONTROL UNIT PCB LAYOUT 41 LOGIC UNIT PCB LAYOUT 42 LOGIC UNIT SCHEMATIC 43 VCO UNIT SCHEMATIC 66 88 MHZ 44 VCO UNIT SCHEMATIC 134 174 MHZ 45 VCO UNIT SCHEMATIC 176 276 MHZ 46 VCO UNIT SCHEMATIC 300 520 MHZ 47 VCO UNIT PCB LAYOUT 48 DCS UNIT SCHEMATIC PCB 49 ...

Page 5: ... W 5 10 W 10 W 25 W 5 10 W 10W 10 W 25 W 40 W 10 25 W 25W 10 25 W 25W in VHF and UHF bands 20 40 W 40W 20 40 W 40W All powers are programmable high or low two levels by channel and selectable at front panel Low power levels are adjustable down to 2 W Max Frequency Deviation Wide band 5 kHz Narrow band 2 5 kHz Frequency Stability 0 0003 Frequency Response Within 1 3dB of 6 dB octave pre emphasis fr...

Page 6: ...ulness safety and efficiency of any communications system 1 1 2 RADIO FEATURES Simplex or semi duplex operation High performance specifications Wide non tuning bandwidth Wide range of standard bands for use in many countries Wide band Narrow band by channel IBM PC compatible field programmable features Emergency alert Direct input of channel number Up to 200 channels or Up to 100 channels with 8 d...

Page 7: ...nt to transmit DO NOT allow children to play with any radio equipment containing a transmitter DO NOT operate the radio near unshielded electrical blasting caps DO NOT operate the radio in an explosive atmosphere unless the radio is specifically approved for such use DO NOT operate the radio in a vehicle while refueling 1 1 4 MODEL NUMBER CODING The radio model number contains information about th...

Page 8: ...e Part No Qty 1 Transceiver KG208 xxxxxx 1 See listing at right and drawing below 2 Hand Microphone KD 559 1 3 Hang up clip screw 99 40 0204 1214 3 4 Hang up clip washer 99 47 1104 23 3 5 Hang up clip 14 11 64 01 1 1 1 7 OPTIONAL ITEMS 6 Mounting bracket 2A10 0164 1 7 Mounting screw STB 5 x 15 4 Check your order or packing list for the items 8 Flat washer FW 5PAI 4 to be supplied 9 Battery cable S...

Page 9: ...cable into the vehicle The cable terminals should be placed near the battery or converter The white connector should be near the radio 5 Avoid hot parts in the engine compartment 6 Tie cable to the vehicle body at several points to avoid movement 7 Use rubber grommets or tape when passing through holes in the chassis 8 Connect blue lead to the or the negative terminal of the battery or converter 9...

Page 10: ...of or trunk boot lid 1 Follow the instructions supplied with the antenna for installation 2 Install the cable and route it to the rear of the radio 3 Connect the cable to the antenna connector of the radio 4 When installation is complete use a thru line wattmeter to adjust the antenna for best SWR 2 1 7 PROGRAMMING Programming instructions are too extensive to be included in this manual Please ref...

Page 11: ...e name will appear after a short time The channel may also be selected by pressing C on the keypad and entering the channel number then C again see OPERATION section To adjust the SQUELCH press the SHIFT button The CHANNEL knob will now become the squelch control Normal setting is SQ 4 3 1 3 SHIFT BUTTON Assigns alternate functions to Channel Knob and the keypad Stays active for four seconds after...

Page 12: ... Center row 3 2 3 ALPHANUMERIC CHARACTERS There are eight alphanumeric characters across the center that display channel number channel name tone format call numbers caller ANI and other information required by the program Bottom Row 3 2 3 SCAN Indicates that the radio is in one of the scan modes 3 2 3 BUSY Indicates that the channel is in use 3 2 4 TX Indicates that the radio is in the transmit m...

Page 13: ... though the BUSY icon is still displayed If a CTCSS or DCS decoder is in use a icon will appear in the lower right of the display and the audio will remain muted when another person outside of your system is using the channel indicated by the BUSY icon If you wish to listen to this message you may disable your decoder by pressing the MONITOR button This will toggle the decoder and speaker ON OFF c...

Page 14: ...ress SCAN 3 3 5 5 Priority Transmit When the radio is in the All Scan mode if you press the PTT the radio will switch to the All Scan HIGH priority channel and remain there during the transmission and for several seconds after This allows the operator to send a message on the priority channel and receive a reply without exiting the scan mode 3 3 5 6 Program Scan In this mode the radio will scan al...

Page 15: ...begun and or ended his transmission Tones may also be programmed to beep when keypad buttons are pressed 3 4 4 POWER OFF TIMER If this feature is programmed the radio will automatically turn off after a period of time with no activity 1 to 15 hours This will prevent the vehicle battery from going dead when the radio is not in use When the radio turns off the display will show PW OFF To return to n...

Page 16: ...her radio during the period when it is not transmitting see Kill Mode on previous page With proper display equipment the operator at the control point will know which radio is transmitting and that an emergency exists 3 4 10 USER PASSWORD PIN Number When this feature is programmed you must enter the proper Personal Identification Number up to 6 digits before the radio will operate This prevents un...

Page 17: ...nter digits for selective calling However the keypad is also used to control many radio functions by pressing keypad buttons within four seconds after pressing the SHIFT key For some functions the SHIFT is not required SHIFT POWER ON Firmware and Software Identification If the SHIFT is held when the radio is turned on the display will indicate the firmware version and the software required for pro...

Page 18: ...on If the radio is fitted with an optional Digital Encryption module SHIFT switches the module form the clear to the encrypt mode no SHIFT PIN entry If the radio has been programmed to require a Personal Identification Number PIN for operation the operator must press to clear the display before entering the PIN This will be requested upon turning on the radio The display will show PLS PIN The oper...

Page 19: ... to the selected channel This feature is helpful if you are using a large number of channels SHIFT D Sends Call In DTMF Mode sends sequence of DTMF digits immediately after entry Example The operator enters sequence 1 2 3 4 5 then pressed D to send the call In 5Tone mode sends R repeat 5Tone sequence D no SHIFT Send 5Tone or Redial DTMF In 5Tone mode sends or redials displayed sequence entered by ...

Page 20: ...ive high transmit command on the TX1 IN input at CN6 11 The lower half of Q12 provides an inverted active low PTT signal to the VCO at CN2 3 IC14 provides protection from wide variations in the power supply voltage If the voltage drops below 8 V or rises above 18 V a STOP OUT signal is output to the logic board on CN6 3 to stop the CPU and shut down the radio 4 2 RECEIVER 4 2 1 RF SECTION The rece...

Page 21: ... signal mentioned in the last paragraph In the transmit mode the voltage is removed from the receiver which causes a loss of voltage on the anode of D7 This immediately mutes the receiver 4 2 6 RECEIVER MUTE Operating voltage for the receiver circuits described above comes from IC12 5 Volt Regulator Q12 switches the voltage off during PTT to mute the receiver Also all voltage is removed upon activ...

Page 22: ...tput is amplified by IC301 Q307 and sent to the transmitter on CN5 1 TX OUT Audio enters the VCO at CN4 5 MOD and is applied to varactors D303 and D304 to FM modulate the oscillator For widely spaced transmit channels FVR301 is used to balance the modulation at low and high channels Operating voltage for the TX oscillator is filtered by Q308 Q305 switches the voltage to the oscillator and gates Q3...

Page 23: ...lso buffered by IC4 and is used as a tuning voltage for the receiver RF section Switch IC5 speeds up the loop filter to allow rapid frequency shifts in the scan mode If the VCO is out of lock a logic low appears at pin 7 This is inverted by Q7 and is applied to Q11 to disable the transmitter 4 5 LOGIC UNIT The radio operating firmware is programmed into the CPU IC203 at time of manufacture The Log...

Page 24: ... power switch is turned off The keypad permits entry of DTMF or 5 Tone encode messages and various control functions Other controls include the SHIFT which is used to change the function of various buttons SCAN which activates the scan function and MUTE MONITOR which controls the decoder IC401 controls the LCD display using serial data from the logic board at CN3 11 12 13 14 ...

Page 25: ...ADJUSTMENTS 5 2 1 GENERAL All adjustments have been properly set at the factory and should not require readjustment in the field If a module has been replaced refer to the section which covers the adjustment or tuning of that module Tuning tools should fit exactly Use insulated nonmetallic tools for all RF adjustments Always use an antenna or 50 Ohm dummy load for transmitter tests Do not key tran...

Page 26: ... at the rear connector pin 3 or 4 jumper wire Connect the other lead to the radio chassis Remove bottom cover 2 black screws 2 Connect signal generator to antenna connector select center channel frequency 3 Check that RX VCO voltage at TP2 is near 3 V 5 V Recheck VCO adjustment if necessary 4 Select the center channel and adjust L1 L2 and L5 L6 or BPF1 depends on band and T3 for best sensitivity C...

Page 27: ...ION ADJUSTMENT 1 Select the low power low frequency channel 2 Connect dummy load or antenna to the transmitter 3 Connect deviation meter using proper attenuation 4 Connect microphone to the connector on the control unit 5 While speaking loudly and very close to the microphone key the transmitter and adjust FVR2 for 4 8 kHz deviation 6 Adjust FVR5 for 700 Hz deviation of the CTCSS tone note that an...

Page 28: ...e steps above to reassemble 5 3 5 DC CORD REMOVAL 1 Remove bottom cover 73 2 Desolder red and blue wires 47 from main unit 58 3 Use pliers to squeeze grommet together 4 Push DC cord 47 and grommet 46 outward through opening in rear of main chassis 29 5 Open grommet 46 and remove DC cord 47 6 Bend new DC cord in the same place that the old cord is bent 7 Install grommet 46 on new DC cord 8 Install ...

Page 29: ...antenna cable clamp 50 10 Disconnect CN7S socket 45 from CN7P plug on main unit 58 11 Disconnect CN8S socket 45 from CN8P plug on main unit 58 12 Desolder DC cord assembly 47 and Antenna Cable 48 from main unit 58 13 Remove top cover 35 14 Remove logic unit 33 15 Remove four bind screws 32 from logic shield 31 16 Remove logic shield 31 17 Disconnect microphone cable assembly 56 from CN3S socket on...

Page 30: ...CD cover 10 4 Remove LCD conductive pad 12 5 Remove LCD display 11 6 Desolder four tabs on the control unit 14 and remove LCD backlight 13 7 The LCD display 11 makes contact by mechanical pressure against contacts on the control unit circuit board 14 and LCD conductive pad 12 Clean all contact surfaces with rubbing alcohol 8 Install new backlight and solder into place This part is symmetrical so i...

Page 31: ...new speaker and reverse the steps above to reassemble 5 3 14 VOLUME SQUELCH CONTROL AND MIC SOCKET REPLACEMENT 1 Remove control panel 8 2 Disconnect volume assembly 16 from CN402P plug on control unit 14 3 Pull volume knob 3 off 4 Pull squelch knob 4 off 5 Remove nut 6 from V S switch 18 6 Remove one bind screw 5 from front of control panel 8 7 Remove two sems screws 27 from speaker housing 26 8 R...

Page 32: ..._________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ __________________________________________________...

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