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PK-100N

PK-400N Service Manual

* This Service manual is subject to change according to improvement of PK-Series Portable Radio without notice.

* Version #1 (2004-11-20)

Summary of Contents for PK-100N

Page 1: ...PK 100N PK 400N Service Manual This Service manual is subject to change according to improvement of PK Series Portable Radio without notice Version 1 2004 11 20 ...

Page 2: ...are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio Frequency energy and if not installed and used in accordance with th einstruction may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipm...

Page 3: ...ts are applicable to situations in which persons are exposed to RF energy as a consequence of their employment and such persons have been made aware of the potential for exposure and can exercise control over their exposure This means you can use the transceiver only if you are aware of the hazards of operating a transceiver and are familiar in ways to minimize these hazards This transceiver is no...

Page 4: ...ccupational use you must observe and adhere to the above points Electromagnetic Interference Compatibility Electronic devices are susceptible to electromagnetic interference EMI if they are not adequately shielded or designed for electromagnetic compatibility Because this transceiver generates RF energy it can cause interference to such equipment Turn OFF your transceiver where signs are posted to...

Page 5: ...indows Alphanumeric LCD Windows enable to represent any kind of expression on LCD Display 2 Caller ID Paging Feature PK series have a Caller ID Function that is usually used in the TRS Radio to maximize communication efficiency and convenience The caller s ID is displayed on the right bottom on screen 3 Enhanced Functionality The microprocessor has been installed to implement various Enhanced feat...

Page 6: ...For compatibility with current models of UNIMO the data of those models such as channels tones 5 tone ID etc are cloned to another radio with Cloning cable 9 Improved Security Security features like Key Lock and Password will prevent and avoid misuse of the radio by unqualified people in case the radio is stolen or lost 1 1 Part Number Breakdown The following is a breakdown of the part number used...

Page 7: ...Display LCD Menu Button Microphone Speaker On Off Volume Antenna PTT Button Monitor Button Battery Locker Ear Mic jack Figure 3 1 Appearance of the PK series Product Figure 3 2 LCD of the PK series Product RSSI TX POWER KEY LOCK ALERT BATTERY VOX MODE CTC DCS SCAN CHANNEL NUMBER GROUP NUMBER TWO FIVE TONE ...

Page 8: ...a Insert the antenna screw into the antenna hole and screw the antenna clockwise 2 Removing the Antenna To remove the antenna screw the antenna counterclockwise 4 2 Installation and Removing PK series Batteries 1 Inserting and Removing the Battery Figure 4 1 Installing and Removing PK series Product Batteries ...

Page 9: ...ghly reliable and could be charged very fast Correct using the battery will improve the efficiency and life of the battery 2 Please charge the battery before using the radio for best performance and safety 3 This battery has been designed suitable only for the chargers of UNIMO So please don t use for the other manufacturer s charger Since it will result in damage of the battery and the radio 4 Wh...

Page 10: ...he front slot has the priority While the battery in the front slot is being charged the other battery in the rear slot will stand by and will be fast charged only after the battery in the front lost is fully charged If the user removes a battery being charged from the charger the other battery in standby state will start to be fast charged Although the green lamp is on after the battery is fully c...

Page 11: ... DTMF or 5 tone ID will be transmitted and during this time voice communication will be interrupted for several seconds Then red LEDs for transmission and reception will be turned on It is recommended to talk 5 10cm away from the microphone for the best voice communication Note If the user makes transmission for more than a certain time while BCLO or TOT feature is on transmission will be forceful...

Page 12: ...el will not be changed and a different sound from beep will be generated For fast increase or decease channel numbers press Channel buttons and for a while In this case however beep sound will not be generated 5 5 Adjusting the Transmission Power The user can change the transmission power High Power or Low Power By pressing Up button while PTT button is being pressed the user can select H High Pow...

Page 13: ...ve Call Paging mode by pressing press Menu and M button for a while in Normal mode Select the other person s tone number by pressing Channel buttons and For example if TOMMY wants to call JOHN TOMMY needs to select JOHN s tone number by pressing Channel buttons and in Selective Call Mode JOHN s tone number 12345 TOMMY s tone number 54321 And then if TOMMY presses Menu button JOHN will be called At...

Page 14: ...ng Cloning function is to clone the data such as frequency tones and scanning of one radio to the other radios Cloning Method Prepare a Cloning cable PFCLONA which is manufactured by UNIMO Technology Available in branch offices and sales agencies of UNIMO Turn on the radio while pressing PTT button and turn on the target radio while pressing Menu button Clone Mode will be displayed on the radio wh...

Page 15: ... button Exit Menu mode by pressing M s button Figure 5 12 Change Group Figure 5 13 Set Squelch 5 12 Set Squelch Select the squelch sensitivity Normal or Tight in order to control feeble reception signals and noise Enter into Menu mode Select Squel by pressing Channel buttons and and press Menu button Then the message of the squelch sensitivity will be displayed Select the squelch sensitivity Norma...

Page 16: ...ng Channel buttons and and press Menu button Select On or Off by pressing Channel buttons and and save the selected status by pressing Menu button Exit Menu mode by pressing E s button Figure 5 14 ID ANI Figure 5 15 KET TONE 5 14 Set Key Tone Set Key Tone menu is to decide whether to generate sound or not when the user presses four buttons on the front side of the radio Enter into Menu mode Select...

Page 17: ...s By pressing M the user can delete a channel from the scan list and in this case No will be changed into After setting a scan list press M Then the scan list and Prior Channel message will be displayed Select a priority channel by pressing Channel buttons and and press Menu button The user can select two higher channels as priority channels After P CH is displayed press Menu button Select a chann...

Page 18: ...Menu Then Key Pressing Lock message will be displayed Select On or Off by pressing Channel buttons and and save the selected status by pressing Menu button Exit Menu mode by pressing M s button Select Off Then the bell symbol will disappear on the LCD Figure 5 18 SET Key Lock Figure 5 18 SET PASSW Menu Menu Menu M Menu Afeter 1 Sec Blank M Wrong Afeter 1 Sec PTT PTT Menu PTT OK Menu Afeter 1 Sec O...

Page 19: ...s PTT button on left side of the radio twice Exit Menu mode by pressing M button after typing in the password Caution If the user forgot the password the user cannot use the radio and need to contact the service center of Unimo Do not forget the password 5 18 Forbid Tx Forbid Tx is to forbid transmission forcefully and allow the radio only to receive calls Enter into Menu mode Select Forbid by pre...

Page 20: ...16 Figure 5 18 SET Forbid Tx Figure 5 18 SET VOX Menu Menu Blank Menu M Yes No M M Menu Blank Menu M Yes No Menu Menu M Menu Menu M M ...

Page 21: ... 027 167 9 043 196 6 012 100 0 028 173 8 044 199 5 013 103 5 029 179 9 045 206 5 014 107 2 030 186 2 046 229 1 015 110 9 031 192 8 047 254 1 016 114 8 032 203 5 Table 6 1 CTCSS Frequency Table 6 2 DCS Tone Table No DCS Code No DCS Code No DCS Code 01 023 29 174 57 445 02 025 30 205 58 464 03 026 31 223 59 465 04 031 32 226 60 466 05 032 33 243 61 503 06 043 34 244 62 506 07 047 35 245 63 516 08 05...

Page 22: ...1060 1124 1124 1060 970 1124 970 631 2 1160 1197 1197 1160 1060 1197 1060 697 3 1270 1275 1275 1270 1160 1275 1160 770 4 1400 1358 1358 1400 1270 1358 1270 852 5 1530 1446 1446 1530 1400 1446 1400 941 6 1670 1540 1540 1670 1530 1540 1530 1040 7 1830 1640 1640 1830 1670 1640 1670 1209 8 2000 1747 1747 2000 1830 1747 1830 1336 9 2200 1860 1860 2200 2000 1860 2000 1477 A 2800 2400 2400 970 2600 1050 ...

Page 23: ...ity Squelch Sensitivity Selectivity Spurious and Harmonic Rejection Inter modulation FM Hum and Noise Maximum Frequency Spread Audio Output Power Audio Distortion Audio Response Speaker Impedance IF Frequencies Input Impedance 282uV 12 dB SINAD 25uV 10dB SINAD 60dB 12 5KHz 70dB 60dB 40dB 38MHz 1 Watt across an 16 ohm load Less than 5 at rated output 1 3 dB from 6dB per octave de emphasis Character...

Page 24: ...Squelch Sensitivity Selectivity Spurious and Harmonic Rejection Inter modulation FM Hum and Noise Maximum Frequency Spread Audio Output Power Audio Distortion Audio Response Speaker Impedance IF Frequencies Input Impedance 282uV 12 dB SINAD 25uV 10dB SINAD 60dB 70dB 60dB 40dB 40MHz 1 Watt across an 16 ohm load Less than 5 at rated output 1 3 dB from 6dB per octave de emphasis Characteristic from 3...

Page 25: ...3dBm Measure the local signal No Check the Rx bias Q105 Check the Rx VCO end Yes Send the currently received frequency to the C351 Send the corresponding channel frequency to the C300 Is the sensitivity 110dBm at 12dB SINAD Scope SINAD meter Yes Is the sensitivity 118dBm No Are collector voltages of Q301 and Q308 around 3 7V No No Check the harmonic filter and the antenna connection part The sensi...

Page 26: ...ier RX 5V power supply and parts No No Replace the IF U101 Does the sub oscillator of the secondary station 20 945MHz in the X301 oscillate Scope Counter No Is the voltage at Pin 4 of the IF U101 normal VTVM Yes Yes Check voltages at each pin of the IF U101 VTVM Replace X TAL and other parts of the sub oscillator of the secondary station in X301 Yes Is the voltage at each pin normal VTVM Yes Check...

Page 27: ...d replace them if necessary Yes Yes No Check if Q501 and Q502 perform amplification at the power drive end Check the rated output and parts Check diodes D101 and D300 Check the harmonic filter Check the output of the power FET Q503 VTVM RF Power meter No Check the output end of the FET Q503 Check if the input level is 22dBm and the output level is 37dBm or higher RF Mill volt meter Yes Yes Replace...

Page 28: ... visual inspection Is the VCO shield can normal Yes Yes Are bias voltages of Q102 and Q104 normal No Check parts of the power supply circuits of Q33 and Q34 No Are bias voltages of Q103 and Q104 normal Yes Yes Check if the bias voltage of the C130 is 5V VTVM No Check devices around Q33 Q34 and U601 No Check if the bias voltage of the C140 is 5V VTVM Yes Yes Is the control input voltage L151 of PF ...

Page 29: ...eck Pin 19 of U505 Check Pins 1 8 and 7 of U507 Is not output normal No Check the power supply status and Pin 6 of U505 Replace them if necessary Yes Do Pins No 16 No 15 and No 14 of U505 normally function No Check the power supply status and the clock of U505 Replace U505 if necessary Yes Do OP amplifiers of U507D B C A normally function No Check MIC1 and the power supply status of Q513 Replace U...

Page 30: ...Data and Pin No 14 Enable of U401 normal Scope No Yes Check 12 8MHz TCXO and the power supply part of U402 and replace them if necessary Does Pin No 1 of U401 oscillate 12 8MHz Spectrum No Yes Check the power lines of U401 and U402 Are voltages at Pins No 4 and No 5 of U401 normal 5V VTVM No Yes Check resistances and voltages of the VR11 the R105 the R106 and the R107 Is it possible to create osci...

Page 31: ...ROM U501 data Yes Yes Press Monitor button Is the green lamp is turned on and is sound made No Yes Press the PTT switch Is the red lamp is turned on and does transmission start No 1 Is there a power voltage 2 Does the X10 4 032MHz oscillate 3 Check if there is any trouble in the PLL and the VCO 4 Check if there is any data error in U501 EEPROM 5 Check the CPU and other circuits Yes Trouble in othe...

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