Kenwood TH-K2AT Service Manual Download Page 51

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J72-0883-09 (B/3)

J72-0883-09 (C/3)

R230

C243

–

Q50

D48

D49

336

R337

CN7

KYO2

KIN

KYO1

CN8

KIN3
KIN0
KIN2
GND
M IG
8M
IM

KYO2
KYO1
KYO0

LAM P

KIN4

KYO3

KIN1

PC BOARD

TH-K2AT/K2E/K2ET

Com ponent side

Foil side

Layer 1
Layer 2
Layer 3
Layer 4

TX-RX UNIT (X57-674X-XX) (B,C/ 3) Foil side view (J72-0883-09 B,C/ 3)
0-11 : K,K2 0-21 : M ,M 2 2-71 : E 2-72 : E3

Ref. No. Address

Q50

D48

11C

D49

11B

Summary of Contents for TH-K2AT

Page 1: ...BC 21 WALL CHARGER 58 PB 43N Ni MH BATTERY PACK 58 BT 14 BATTERY CASE 59 PG 4Y PROGRAMMING INTERFACE CABLE 59 MCP 1A MEMORY CONTROL PROGRAM 59 SPECIFICATIONS BACK COVER Knob ENC K29 5159 03 Knob VOL K29 5150 03 Cabinet assy 16key A02 3819 23 Helical Antenna T90 1018 25 Key top 16key K29 9272 02 Front glass B10 2746 03 Knob PTT LAMP MON K29 9274 03 Knob ENC K29 5159 03 Knob VOL K29 5150 03 Cabinet ...

Page 2: ...e TX RX PC board PTT PC board TX RX unit C 3 3 Remove one screw on the PTT PC board 4 Pull the PTT PC board to the left and remove it from the connector CN6 of the TX RX PC board TX RX unit A 3 Ω TX RX PC board TX RX unit A 3 5 Remove the SP MIC jack cover 6 Remove tw o screw s ç holding the shield cover antenna terminal section 7 Remove tw o screw s holding the shield cover final amplifier sectio...

Page 3: ... and the PC board b If there is any space between the radiation plate and PC board eliminate it by applying the tip of the soldering iron to the radiation plate 7 Apply the tip of the soldering iron to the installation side of the radiation plate of the TX RX PC board put a little amount of solder to the radiation plate that is seen through a square hole in the final FET installation section and m...

Page 4: ... foil side until the bases of each tabs are folded at least 45 degrees Fig 3 If the bending angle of the tabs of the LCD hardware fixture is less than 45 degrees a display error may occur Bending position NG NG Min 45 degrees 3 PTT PCB TX RX unit C 3 installation procedure Installing the PTT PCB on the TX RX PCB and chassis are as follows 1 Insert the PTT PCB connector CN7 into the TX RX PCB conne...

Page 5: ...htly with the chassis Clearance NG Fig 6 6 Cautionsfor installing the chassison the case assembly 1 Verify that the packing G53 1572 02 TX BUSY lamp section is has been past through the hole in the illumination guide section on the top of the case assembly Fig 7 LAMP LOW PTT Fig 7 2 Align the speaker lead as shown fig 8 Do not place the leads over the key top section LCD section or SP MIC DC IN ca...

Page 6: ...CXO BPF L41 L40 L38 BPF L32 L35 MIXER Q16 1st Local OSC PLL RF AMP Q17 ANT MCF XF1 IF AMP Q24 FM IC IC3 Q23 2nd Local OSC X1 AF AMP IC6 5R 5R D20 D21 LV 6 Tuning voltage D18 38 85MHz 12 8MHz D19 A tuning voltage corresponding to the desired signal is applied to each varicap through the BPF APC terminal pin 6 of the MPU IC8 to tune to the receive frequency First Mixer The received signal passing th...

Page 7: ...SP JACK Fig 3 IF Squelch Mute and S meter circuit Fig 4 AF amplifier FM IC and band pass filter consisting of R125 R126 R135 C173 C174 The noise component is rectified in the FM IC to produce a DC voltage which is output from the N REC terminal pin 14 of the FM IC as squelch voltage The squelch voltage enters the SQ terminal pin 48 of the MPU IC8 and is compared with the reference voltage preset i...

Page 8: ... 5 Microphone amplifier circuit MIC HPF MIC AMP IC16 ANT SW D10 L19 D12 D13 VCO Q1 LPF IC5 VR5 MAX DEV Q2 RF AMP Q5 RF AMP Q9 RF AMP Q10 DRIVE AMP Q11 DRIVE AMP Q12 POWER AMP ANT Fig 6 Modulation Drive Final and Transmission reception switching circuit APC Circuit The APC Automatic Power Control circuit is used to obtain a stable transmission power and controls transmission output by detecting the...

Page 9: ... 8MHz TX RX 5T 5 0V 5R 5 0V VR1 Fig 8 PLL and VCO circuit amplifying VCO output with an RF amplifier Q6 and dividing it with the PLL IC The PLL synthesizer w ith 5 kHz and 6 25 kHz step is configured by comparing phases of the reference frequency and comparison frequency The phase difference between reference frequency and comparison frequency passes through a charge pump in the PLL IC then ripple...

Page 10: ...184 Q R 2SC4617 R IC4 5MS SW Q55 5MV SW Q36 RB521S 30 DC IN DET RN2105 AF AMP 2SB1184 Q R PROTECT 5 0V 11 5V AF LAMP AVR RN2105 Q53 PROTECT THERM DET 2SK1830 B RB051L 40 Q33 AVR IC9 B PROTECT D36 RB521S 30 D35 PROTECT RB521S 30 PROTECT D30 RB521S 30 IC8 MPU D31 DA221 CONSTANT CURRENT BTEMP DCDET BATT TERMINAL 7 5V Norminal 6 0 9 0V DC IN 13 8V Norminal 12 0 16 0V IC1 TCXO Q4 5 6 D40 41 5R 5T VR1 E...

Page 11: ...ssing and VOX voltage monitoring are performed through each A D port of the MPU Battery Save Circuit If there is no signal squelch off scan off or no key operation for longer than 10 seconds the transceiver will enter the battery save mode Battery save operation is performed by controlling Q57 with an output signal from the 5C SAVE terminal pin 15 of the MPU The 5C ON OFF cycle ratio during batter...

Page 12: ...TARY ENCODER KIN1 KIN2 KIN3 KIN4 IC8 MPU PTTI 14 PTTE 13 ENCB 36 ENCA 35 SET MONI LAMP MENU CALL MR VFO F KIN0 KOUT0 KOUT1 KOUT2 KOUT3 95 S7 J3 KIN1 KIN2 KIN3 KIN4 IC8 MPU PTTI 14 PTTE 13 ENCB 36 ENCA 35 PWRSW POWER SW ROTARY ENCODER Other keys composes amatrix and key presses are detected by scanning them by software The encoder reads data using the interrupt port pins 35 and 36 of the MPU 16 key...

Page 13: ... and is output from the DTMF BEEP terminal pin 40 of the MPU The DTMF signal is mixed with an audio signal at the input side of the AF amplifier IC6 and is output as a monitor tone The DTMF signal is mixed with a modulation signal at the input side of pre emphasis in the microphone amplifier IC16 and used as a transmit signal VOX The IC5 and Q30 amplify the audio signal captured in the microphone ...

Page 14: ...ge input for ADC 45 AVSS Ground for ADC 46 REM I Remote control microphone key voltage input A D 47 SIGIN I Decode w aveform input of CTCSS DCS A D Pin Pin I O Function No Name Pin Pin I O Function No Name 48 SQ I Noise voltage input for squelch A D 49 SM I RSSI voltage input for S meter A D 50 VOXIN I Microphone voltage input for VOX A D 51 THERM I TX temperature compensation input A D 52 BATT I ...

Page 15: ...ion No Name IC1 PLL IC IC2 APC differential amplifier IC3 FM IC IC4 11 5V AVR IC5 HPF Active filter IC6 AF amplifier IC8 MPU IC9 5 0V AVR IC10 4 4V voltage MPU INT voltage detection detection IC11 3 3V voltage MPU Reset voltage detection detection IC12 5 0V AVR IC15 EEPROM IC16 MIC amplifier Limiter splatter filter IC17 CTCSS DCS WX Active filter filter Q1 VCO Q2 RF amplifier Q3 VCO shift On RX co...

Page 16: ...ch Q50 Key LED switch On when the key LED lights Q51 LCD LED switch On when the LCD LED lights Q52 Beat shift switch Q53 5R 5MV switch On when 5R or 5MV is applied Q55 5T switch On when 5T is applied Q56 Speaker mute switch Q57 5C switch On when 5C is applied Q58 Q12 gate Off when High power is selected voltage switch Q59 WX detection amplifier D1 2 VCO frequency control D5 Frequency shift D6 VCO ...

Page 17: ... CARTON CASE TH K2AT K2 M 2 26 2F H12 3146 01 PACKING FIXTURE K M E 26 2F H12 3146 01 PACKING FIXTURE E3 27 3G H12 3147 03 PACKING FIXTURE K2 M 2 28 2A 2C J19 5451 03 HOLDER TERM INAL 29 1B 1D J21 8456 03 HARDWARE FIXTURE LCD 30 2E 3G J29 0709 04 BELT HOOK ASSY ACCESSORY 31 2A 2C J30 1284 04 SPACER PTT KNOB 32 3E 2G J69 0342 05 HANDSTRAP ACCESSORY M M 2 E 32 3E J69 0342 05 HANDSTRAP ACCESSORY E3 3...

Page 18: ... 0 010UF K C129 CC73HCH1H110J CHIP C 11PF J C130 CK73HB1H102K CHIP C 1000PF K C131 133 CK73HB1C103K CHIP C 0 010UF K C134 CK73HB1H102K CHIP C 1000PF K C135 CC73HCH1H120J CHIP C 12PF J C136 CC73HCH1H100D CHIP C 10PF D C137 CC73HCH1H050C CHIP C 5 0PF C C138 CK73HB1H102K CHIP C 1000PF K C141 142 CK73HB1H102K CHIP C 1000PF K C145 CC73HCH1H220G CHIP C 22PF G C147 CK73HB1H102K CHIP C 1000PF K C148 CC73H...

Page 19: ...K M M 2 E C349 CK73HB1A104K CHIP C 0 10UF K E3 C349 350 CK73HB1A104K CHIP C 0 10UF K K K2 C351 CK73HB1C103K CHIP C 0 010UF K C352 354 CK73HB1H102K CHIP C 1000PF K C355 356 CK73HB1C103K CHIP C 0 010UF K C357 CK73EF1C105Z CHIP C 1 0UF Z C358 CK73HB1A473K CHIP C 0 047UF K C359 360 CK73HB1A104K CHIP C 0 10UF K C366 CC73GCH1H101G CHIP C 100PF G C500 501 CC73HCH1H1R5B CHIP C 1 5PF B C502 CC73HCH1H030B C...

Page 20: ...0K J 1 16W R58 RK73HB1J100J CHIP R 10 J 1 16W R59 RK73HB1J123J CHIP R 12K J 1 16W R60 RK73HB1J563J CHIP R 56K J 1 16W R61 62 RK73HB1J221J CHIP R 220 J 1 16W R64 R92 1368 05 CHIP R 0 OHM R70 72 RK73EB2ER39K CHIP R 0 39 K 1 4W R74 75 RK73HH1J104D RESISTOR 100K D 1 16W R76 79 RK73HH1J154D RESISTOR 150K D 1 16W R80 RK73HB1J103J CHIP R 10K J 1 16W R81 RK73HB1J394J CHIP R 390K J 1 16W R82 RK73HB1J273J C...

Page 21: ...K J 1 16W R224 RK73HB1J183J CHIP R 18K J 1 16W R226 RK73HB1J221J CHIP R 220 J 1 16W R227 RK73HB1J101J CHIP R 100 J 1 16W R230 RK73HB1J221J CHIP R 220 J 1 16W K K2 M R230 RK73HB1J221J CHIP R 220 J 1 16W M 2 E3 R231 RK73HB1J151J CHIP R 150 J 1 16W R235 236 RK73HB1J102J CHIP R 1 0K J 1 16W R237 RK73HB1J104J CHIP R 100K J 1 16W R238 239 RK73HB1J102J CHIP R 1 0K J 1 16W R240 RK73HB1J104J CHIP R 100K J ...

Page 22: ...4V M OS IC IC3 TA31136FN M OS IC IC4 XC6202PB52FR M OS IC IC5 NJM 2107F M OS IC IC6 TA7368F M OS IC IC8 90522BPFFG139 M PU IC9 TK11250CM M OS IC IC10 S 80844CNNBB85 M OS IC IC11 S 80930CNNBG80 M OS IC IC12 TK11250CUCB M OS IC IC15 AT25160N10SI27 ROM IC IC16 NJM 2904V M OS IC IC17 NJM 2902V M OS IC Q1 2SC5066 O TRANSISTOR Q2 2SC5488 TRANSISTOR Q3 2SK1830 FET Q4 2SC4617 R TRANSISTOR Q5 6 2SC5488 TRA...

Page 23: ...3 3 7 C B 34 35 6 40 16 D D D 29 10 8 9 15 19 18 17 36 37 D TX RX Unit B 3 TX RX Unit C 3 TX RX Unit A 3 Dx2 D D E Ex2 D Dx2 D 23 33 39 28 14 22 Ax2 13 21 E E 5 4 12 702 STANDARD LABEL K K2 701 STICKER Fx2 1 K2 M2 Gx2 A N09 1492 05 B N14 0569 04 C N14 0573 04 D N79 2035 46 E N79 2040 45 F N82 2007 46 G N09 2433 05 31 45 ...

Page 24: ... K2E C D 1 2 3 2 7 C B 34 35 6 40 16 D D D 29 10 8 9 15 19 18 17 38 37 D TX RX Unit B 3 TX RX Unit C 3 TX RX Unit A 3 D D D 23 33 39 28 14 22 13 21 E E 5 4 12 A N09 1492 05 B N14 0569 04 C N14 0573 04 D N79 2035 46 E N79 2040 45 F N82 2007 46 G N09 2433 05 31 Dx2 E Ex2 D Dx2 Ax2 701 STICKER Fx2 Gx2 45 ...

Page 25: ...8 0960 15 K 42 CHARGER 230V 13 8V W08 0959 15 M E E3 30 BELT HOOK ASSY J29 0709 04 32 HANDSTRAP J69 0342 05 M E E3 24 ITEM CARTON CASE H52 1960 02 K M H52 1961 02 E H52 1962 02 E3 706 UK PLUG ATTACHMENT E E3 26 PACKING FIXTURE H12 3146 01 705 WARRANTY CARD K E E3 PACKING K M E and E3 types Parts with the exploded numbers larger than 700 are not supplied 703 PAMPHLET R TTE E E3 44 BATTERY ASSY 7 2V...

Page 26: ...plied G H 1 2 3 11 INSTRUCTION MANUAL B62 1695 00 M2 B62 1696 00 B62 1697 00 K2 704 PAMPHLET 25 ITEM CARTON CASE H52 2009 02 41 HELICAL ANTENNA T90 1018 25 32 HANDSTRAP J69 0342 05 M2 27 PACKING FIXTURE H12 3147 03 30 BELT HOOK ASSY J29 0709 04 705 WARRANTY CARD K2 1 CABINET ASSY BATTERY CASE A02 3817 02 ...

Page 27: ... 7 5 V Battery terminal C Squelch SQL1 SQL2 D S meter Two segments in S meter light all segments in S meter light E RX BPF Lower limit frequency center frequency upper limit frequency F 7 5V TX H power Lower limit frequency center frequency upper limit frequency G 7 5V TX M power Lower limit frequency center frequency upper limit frequency H 7 5V TX L power Lower limit frequency center frequency u...

Page 28: ... The detected DC voltage value to the current noise level is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the MENU key to write the current noise level value into the EEPROM 2Squelch SQL2 1 Press the LAMP or MONI key on the transceiver to display SQ2 on the LCD 2 Press the MENU key to write the c...

Page 29: ...value into the EEPROM 2RX BPF Center frequency 1 Press the LAMP or MONI key on the transceiver to display BPC on the LCD 2 Press the VFO M R or CALL key to sw itch to the frequency display 3 Turn the encoder to display the center frequency on the LCD 4 Repeat steps 4 to 6 of 1RX BPF Low er limit frequency described on page 29 3RX BPF Upper limit frequency 1 Press the LAMP or MONI key on the transc...

Page 30: ...n the LCD 4 Press the CALL key to switch to the adjustment display 5 Press the PTT key to enable the transmit mode 6 Adjust the output voltage from DC power supply until the voltage at the battery terminal becomes 7 5V while the transceiver is transmitting 7 Turn the encoder to change the current APC value and adjust the transmission power 8 Press the MENU key to write the current APC value into t...

Page 31: ...r Low er limit frequency center frequency upper limit frequency 113 8V TX H power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display P13L on the LCD In this case the icon appears The current APC value is displayed at the lower digits of the frequency display and the value stored in the EEPROM is displayed on the memory channel number display 2 Press the VFO M R or CAL...

Page 32: ...Press the VFO M R or CALL key to sw itch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 7 of 113 8V TX M power Lower limit frequency described on page 32 K 13 8V TX L pow er Low er limit frequency center frequency upper limit frequency 113 8V TX L power Lower limit frequency 1 Press the LAMP or MONI key on the transceiver to display ...

Page 33: ...tone frequency 151 4Hz is internally generated and modulated 6 Turn the encoder to change the current adjustment value and adjust tone deviation 7 Press the MENU key to write the current adjustment value into the EEPROM 2Tone deviation Center frequency 1 Press the LAMP or MONI key on the transceiver to display DVC on the LCD In this case the icon appears Press the F key and then the PTT key repeat...

Page 34: ...he LCD In this case the icon appears 2 Press the VFO M R or CALL key to sw itch to the frequency display 3 Turn the encoder to display the upper limit frequency on the LCD 4 Repeat steps 4 to 7 of 1DCS deviation Lower limit frequency described on page 33 O VOX sensitivity Level 1 level 9 1VOX sensitivity Level 1 1 Press the LAMP or MONI key on the transceiver to display VOX1 on the LCD Press the F...

Page 35: ...heck 0 7V or more RX 2 Frequency 173 990MHz A 3 4 3V or less TX TX power Low 1 Frequency 136 000MHz 0 7V or more PTT ON 2 Frequency 173 990MHz 4 3V or less PTT ON After observing the VCO lock voltage connect the TX RX unit B 3 to the original position 3 TX frequency 1 TX power Low f counter ANT TX RX VR1 145 990MHz 150Hz Adjust Frequency 145 990MHz A 3 PTT ON 4 Overvoltage Switch to Adjustment mod...

Page 36: ...z MENU SSG 119dBm 0 25 uV 5 SSG 120dBm 0 22 uV Check 12dB SINAD or more 6 LCD display BPH Encoder Write Max Sensitivity Frequency 160 050MHz MENU SSG 119dBm 0 25 uV 7 SSG 113dBm 0 501uV Check 12dB SINAD or more 2 IF response 1 Frequency 144 050MHz SSG Check 12dB SINAD or Check SSG Frequency 221 750MHz Oscilloscope less SSG output 60dBm 224uV Distortion meter Note If the SSG MOD 1kHz specification ...

Page 37: ...illoscope Frequency 146 050MHz Distortion meter K K2 M M2 SSG output 123dBm 0 158uV SSG MOD 1kHz SSG DEV 3kHz 2 SSG OFF Close Squelch 5 S meter 1 Frequency 145 050MHz SSG Check Two segments Check E E3 in S meter Frequency 146 050MHz light K K2 M M2 SSG output 120dBm 0 22uV 2 SSG output 105dBm 1 26uV All segments in S meter light 6 Hum and 1 Frequency 145 050MHz SSG TX RX ANT noise ratio E E3 Oscil...

Page 38: ...it Terminal Unit Parts Method Remarks 1 TX power Write Battery terminal 7 5V High power Mid power Battery terminal voltage 7 5V Switch to Adjustment mode and carry out the operations for adjustment item F Refer to page 29 1 LCD display P7L Frequency 144 000MHz PTT ON 2 LCD display P7C Frequency 145 000MHz PTT ON 3 LCD display P7H Frequency 145 995MHz PTT ON Switch to Adjustment mode and carry out ...

Page 39: ...13L Frequency 144 000MHz PTT ON 2 LCD display P13C Frequency 145 000MHz PTT ON 3 LCD display P13H Frequency 145 995MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item J Refer to page 31 4 LCD display P13L Frequency 144 000MHz PTT ON 5 LCD display P13C Frequency 145 000MHz PTT ON 6 LCD display P13H Frequency 145 995MHz PTT ON Switch to Adjustment mode and carry out...

Page 40: ...nal voltage 7 5V To exit from the Adjustment Mode turn the transceiver power OFF and then ON 2 Frequency 145 000MHz E E3 Frequency 146 000MHz K K2 M M2 PTT ON Battery terminal voltage 6 4V Switch to Adjustment mode and carry out the operations for adjustment item L Refer to page 32 Detector P P HPF OFF LPF 3kHz De emphasis OFF TX power Low 1 LCD display DCS BAL Frequency 145 000MHz E E3 Frequency ...

Page 41: ... Low 1 LCD display DVL Frequency 144 000MHz PTT ON 2 LCD display DVC Frequency 145 000MHz PTT ON 3 LCD display DVH Frequency 145 990MHz PTT ON Switch to Adjustment mode and carry out the operations for adjustment item N Refer to page 33 Detector P HOLD HPF OFF LPF 3kHz De emphasis OFF TX power Low 1 LCD display DVL Frequency 144 000MHz PTT ON 2 LCD display DVC Frequency 145 000MHz PTT ON 3 LCD dis...

Page 42: ...Frequency 146 000MHz K K2 M M2 VOX Gain 4 AG OFF 2 AG 1kHz 100mV Detector P P 2 HPF OFF LPF 15kHz De emphasis OFF TX power Low 1 Frequency 145 000MHz E E3 Frequency 146 000MHz K K2 M M2 Send DTMF code D Detector P P 2 HPF OFF LPF 15kHz De emphasis OFF TX power Low 1 Frequency 145 000MHz E E3 Send 1750Hz Tone TX power High 1 Frequency 145 000MHz E E3 Frequency 146 000MHz K K2 M M2 ANT OPEN PTT ON A...

Page 43: ...LAMP key 5 BL LCD backlight control 6 GND GND CN8 1 KIN1 Key matrix input CN9 2 IM Internal microphone 3 KYO3 Key matrix output 4 8M 8V power supply 5 KIN4 Key matrix input 6 MIG Microphone ground 7 LAMP Key illumination control 8 GND GND 9 KYO0 Key matrix output 10 KIN2 Key matrix input 11 KYO1 Key matrix output 12 KIN0 Key matrix input 13 KYO2 Key matrix output 14 KIN3 Key matrix input CN No Pin...

Page 44: ...350 C351 C161 C356 C166 C167 C168 R58 C169 C170 C171 C172 C173 C174 C175 C176 C180 R70 R71 C182 R72 C183 R74 R75 C186 R76 C187 R77 C188 R78 C189 R79 C190 R80 C191 R81 C192 R82 R83 C193 R84 C194 C195 R85 C196 R86 C197 C198 R90 CN9 X1 CP1 CP2 IC17 1 7 8 14 LV B BTEM P GND 1 8 9 16 D G G S S D 1 3 4 6 D S G 1 8 9 16 1 13 KYO2 KYO1 KYO0 LAM P KIN4 KYO3 KIN1 KIN3 KIN0 KIN2 GND M IG 8M IM 14 2 DCS BAL 1...

Page 45: ... C347 C348 C354 C355 C359 C360 R86 R202 R203 IC10 R204 IC11 R205 R206 R207 R208 R209 IC17 1 14 1 5 2 6 GND KYO1 KIN4 BL KYO2 PTT CN6 D S S G S D J3 MIC Q37 B E C G S D Q56 G S D POWER 1 5 6 10 CN2 INT SP J4 SP 1 3 4 6 1 2 3 4 G S D 1 2 3 4 1 4 5 8 IC15 1 3 4 5 1 3 4 5 J72 0883 09 A 3 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 ...

Page 46: ... D74 D79 R17 C330 R179 C332 C335 C336 R180 R181 R182 R183 R 1 8 6 R185 C152 C153 R190 R191 R192 R193 R194 C158 C159 R195 R196 R197 R198 R199 C160 C162 C163 C357 C358 R61 C366 R62 CN1 X3 R200 R201 IC12 1 4 3 6 1 6 ENCA GND ENCB VOL IN VOL OUT GND 1 2 3 4 IC8 30 31 1 120 90 91 60 61 1 5 J72 0883 09 A 3 46 TH K2AT K2E K2ET PC BOARD TX RX UNIT X57 674X XX A 3 Foil side view J72 0883 09 A 3 0 11 K K2 0...

Page 47: ... R11 R12 R13 C124 R160 R14 R161 R15 R162 R16 R163 R17 R164 C129 D73 C323 C324 C130 C325 C131 C326 C132 R22 C327 C133 C134 C329 C135 Q1 C136 Q2 R173 C137 Q3 C138 R174 R175 Q5 R176 R177 R178 L50 R179 Q9 L54 L55 C141 L56 C142 C338 R180 R181 C145 R182 C147 183 C148 R4 R5 R39 R6 R7 R8 R9 R41 L66 C152 R42 C153 R45 R46 R47 R49 C352 C353 R50 R51 R52 R53 R54 C358 R55 R56 R59 R60 C366 R62 R64 C177 C178 C179...

Page 48: ...R71 C182 R72 C183 R74 R75 C186 R76 C187 R77 C188 R78 C189 R79 C190 R80 C191 R81 C192 R82 R83 C193 R84 C194 C195 R85 C196 R86 C197 C198 R90 CN9 X1 CP1 CP2 R202 R203 IC10 R204 IC11 R205 R206 R207 R208 R209 IC17 1 7 8 14 LV B BTEM P GND 1 8 9 16 D G G S S D 1 3 4 6 D S G 1 8 9 16 1 13 KYO2 KYO1 KYO0 LAM P KIN4 KYO3 KIN1 KIN3 KIN0 KIN2 GND M IG 8M IM 14 2 DCS BAL 1 4 5 8 D S G D S G J2 DC IN FREQ D S ...

Page 49: ...C329 C135 Q1 C136 Q2 R173 C137 Q3 C138 R174 R175 Q5 R176 R177 C330 R178 L50 R179 Q9 C332 L54 C335 L55 C141 C336 L56 C142 C338 R180 R181 C145 R182 C147 R183 C148 R4 R 1 8 6 R185 R5 R39 R6 R7 R8 R9 R41 L66 C152 R42 C153 R190 R191 R45 R192 R46 R193 R47 R194 C158 C159 R195 R49 R196 R197 R198 R199 C352 C353 C160 R50 R51 C162 R52 C163 R53 C357 R54 C358 R55 R56 R59 R60 R61 C366 R62 R64 C177 C178 C179 R88...

Page 50: ...ALL VFO 6 5 4 7 8 9 MR CALL 0 LAMP MONI J72 0883 09 B 3 J72 0883 09 C 3 48 TH K2AT K2E K2ET PC BOARD Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 674X XX B C 3 Component side view J72 0883 09 B C 3 0 11 K K2 0 21 M M2 2 71 E 2 72 E3 Ref No Address D42 4D D43 5D D44 8D D46 5G D47 8G ...

Page 51: ...337 CN7 1 PTT KYO2 BL 5 2 KIN4 KYO1 GND 6 CN8 KIN3 KIN0 KIN2 GND MIG 8M IM KYO2 KYO1 KYO0 LAMP KIN4 KYO3 KIN1 49 PC BOARD TH K2AT K2E K2ET Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 TX RX UNIT X57 674X XX B C 3 Foil side view J72 0883 09 B C 3 0 11 K K2 0 21 M M2 2 71 E 2 72 E3 Ref No Address Q50 3I D48 11C D49 11B ...

Page 52: ...J3 MIC J4 SP R324 47k C339 0 047u R330 470 C193 4 7u6 3 R332 15 C349 0 1u C350 C351 0 01u C352 1000p C353 1000p R335 1k D27 RB706F 40 TH3 100k D30 RB521S 30 2SK1830 Q35 R171 56k D R170 47k D D22 1SS361 C358 0 047u VR5 50k VR6 100k R142 4 7k R149 47k R143 470 C231 1000p C223 1000p C224 0 1u R176 820k R175 2 2k C222 0 01u D36 RB521S 30 D35 RB521S 30 C286 1u C283 1000p C282 1000p C285 1000p C284 1000...

Page 53: ... SEG14 20 SEG15 21 SEG16 22 SEG17 23 SEG18 24 SEG19 25 SEG20 26 SEG21 27 SEG22 28 SEG23 29 SEG24 30 SEG25 31 SEG26 32 SEG27 33 SEG28 34 SEG29 35 SEG30 36 SEG31 SEG30 SEG31 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 COM3 COM2 COM1 COM0 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 SEG14 SEG15 SEG26 SEG25 SEG28 SEG30 SEG27 SEG31 SE...

Page 54: ...205 05 D43 B30 2205 05 R248 3 9k C312 0 039u R246 3 9k C310 1u L63 R244 0 C297 0 1u EEPROM SET INT0 RESET BIT3 MONI JUMPER PTT LAMP KEY TYPE BIT2 BIT1 BIT0 PTT BOARD 5 0V AVR PTT KIN4 KYO2 KYO1 BL GND KIN3 KYO2 KIN0 KYO1 KIN2 KYO0 GND LAMP MIG KIN4 8M KYO3 IM KIN1 5C 5R 5T AVR 5 0V AVR 4 4V VOLTAGE DETECTION 3 3V VOLTAGE DETECTION 5R 5MV SW 10KEY BOARD TX RX UNIT X57 674X XX B 3 MENU TX RX UNIT X5...

Page 55: ...0k C10 0 01u 2SC5488 Q2 R10 47 L9 82n IC1 LMX2316TMX 1 2 3 4 5 6 7 8 9 GND3 10 CE 11 CLK 12 DATA 13 LE 14 FO LD 15 VCC2 16 VP CP1 2 7k C24 1000p R117 2 7k D L53 15n R32 1k C194 0 1u R120 2 7k C166 0 01u L45 560n L1 10u D1 1SV325 D2 1SV325 L2 47n L6 10u C2 1000p L3 82n 2SC5066 O Q1 C8 27p G C9 27p G R9 270 L5 10u R13 6 8k R22 8 2k C3 3p B C7 0 5p B D6 1SV305 R7 47k C124 0 1u R115 5 6k R37 56k Q22 R...

Page 56: ...357 1u L18 220n TH1 10k L14 47n L27 680n C85 56p C366 100p C503 100p C73 1000p C137 5p C138 1000p L29 22n L28 27n D73 MA2S111 R52 1k R111 1 0M R100 1 0M R99 1 0M R110 1 0M C68 18p L23 9T L22 9T 2SC4926YD Q10 R42 100 2SC4617 R Q15 R33 22 R34 3 3k C66 1u R341 0 C142 1000p C112 1000p C72 0 1u C70 1u C92 1000p D17 HSM88AS C510 R345 0 R346 68 R347 100 R351 220 L26 470n R291 0 CN10 VDD APC DIFFERENTIAL ...

Page 57: ...2k C222 0 01u R115 5 6k R37 56k C92 1000p D17 HSM88AS R312 4 7k Q41 RN2105 Q57 RN2105 IC12 TK11250CUCB 1 NP 2 GND 3 CONT 4 VIN 6 VOUT IC9 TK11250CM 1 2 3 4 VOUT 5 GND2 6 VIN C309 1u C311 0 1u C314 1000p C330 1000p C316 0 1u C319 10u10 D36 RB521S 30 D35 RB521S 30 C286 1u C283 1000p C282 1000p C285 1000p C284 1000p C281 1000p R276 47k R275 47k Q53 RN2701 IC4 XC6202PB52FR 1 2 4 GND 3 R264 Q59 R344 Q2...

Page 58: ...ower transmission The RF and IF sections are measured by using a spectrum analyzer After setting the standard 1 kHz 3 kHz Dev deviation each voltage of the AF section is measured by using an AF VTVM or osciloscope The level for each point is measured without removing parts or cutting the pattern All voltage levels must be measured after setting the AF output volt age at 0 58V rms The RF and IF sec...

Page 59: ... 4 TYPE AFM SPM MICM KAPC FINAL CHARGE AFAMP RXLED BTDET TXD 5MS 5R 5T 5C SAVE VOX KYO0 3 VUKEY VCC DVCC AVCC AVRH HST VCC V3 RESET INTUP INTDW CLOCK DATA EEPCS EEPDI BSFT X0 X1 PLLEN PLLLD CLOCK DATA BTEMP KEY ILLMI B30 2205 05 D42 43 46 D44 47 2SK1830 Q50 KEY ILLMI SW LAMP PTT LAMP MONI D48 49 RN4902 LCD ILLMI SW Q51 B30 2205 05 LCD ILLMI DCDET MOD PTTI KIN4 KYO1 KYO2 2SC5488 RF AMP SIGIN NAR X5...

Page 60: ...AF AVR BPF APC SPM TEMP DET TH1 B57331V 2103J 5R 5R APC V D14 MA2S111 FINAL DTMF BEEP SQ SM J2 REM TXD AMP 450kHz R BATT TERMINAL 7 5V Norminal 6 0 9 0V WXA SW 2SK1824 Q59 DC IN 13 8V Norminal 12 0 16 0V RN2701 XC6202PB 52FR IC1 TCXO Q4 5 6 D40 41 Q41 D32 D80 5T SW Q37 Q38 2SK1830 5R 5T 5M CHARGE SW RB051L 40 IC6 D48 49 D42 43 46 D47 44 BATT CHARGE 5R SW TK11250 CUCB 5 0V TK11250 CM VR1 ENC AVR 5C...

Page 61: ...43N External View PB 43N Schematic diagram T Discharge terminal side Rear charge terminal side Thermister DTN 103F3H SYS T Diode ERB83 004 Breaker BBS80A2Y 01 80 C Breaker BBS70 A1N 01 70 C 4N 2N Thermister DTN 103F3H SYS Voltage 7 2V 1 2V x 6 Charging current 1100mAh Dimensions Projections included 58W x 100 8H x 16 8D mm Charger and charging time KSC 24 Rapid charger Approx 60 minutes Weight 210...

Page 62: ...RY CASE PG 4Y PROGRAMMING INTERFACE CABLE MCP 1A MEMORY CONTROLPROGRAM BT 14 6 AA LR6 External View PG 4Y External View MCP 1A Available free for downloading from the Kenwood website http www kenwood com i products info amateur html ...

Page 63: ... method Negative ground Current Transmit with H 13 8 V DC IN 1 8 A or less Transmit with H 7 2 V PB 43N 2 0 A or less Transmit with M 7 2 V PB 43N 1 5 A or less Transmit with L 7 2 V PB 43N 0 8 A or less Receive no signal 100 mA or less Battery Saver ON Average 30 mA or less Usable temperature range 20 C 60 C 4 F 140 F 10 C 60 C 14 F 140 F with PB 43N Frequency stability Within 5 ppm 20 C 60 C Dim...

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