Kenwood TK-P721 Service Manual Download Page 31

Page: 31 / 52

TK-P721

ADJUSTMENT

Common Section

Item

Condition

Measurement

Adjustment

Speciﬁ cations / Remarks

Test-

equipment

Unit

Terminal

Unit

Parts

Method

1. Setting

1) BATT terminal votage: 7.5V
2) SSG standard modulation
[Wide]
MOD: 1kHz, DEV: 3kHz
[Narrow]
MOD: 1kHz, DEV: 1.5kHz

2. Receive
Assist
Voltage

1) (Auto tuning)
*

Note

Power
meter

DVM

TX-RX

ANT

CVIN

TX-RX FPU

(4.0V±0.1V)

2) CH: Low

Check

0.6V or more

3. Transmit
Assist
Voltage

1) (Auto tuning)
*

Note

TX-RX FPU

(4.0V±0.1V)

2) CH: Low
PTT: ON

Check

0.6V or more

Note:

At test mode, click [Tune Assist Voltage] button in test mode dialog box, then start automatic adjustment of Receive/Transmit assist voltage.

Transmitter Section

Item

Condition

Measurement

Adjustment

Speciﬁ cations / Remarks

Test-

equipment

Unit

Terminal

Unit

Parts

Method

1. Frequency

1) TEST CH: Center
PTT: ON

f. counter

ANT

TX-RX FPU

155.100MHz

±50Hz

2. High
Transmit

Power

1) TEST CH: Low, Low’, Center,

High’, High (5 points)

BATT terminal voltage: 7.5V
PTT: ON

Power
meter
Ammeter

FPU

5.0W

±0.1W
2.0A or less

3. Low
Transmit

Power

1) TEST CH: Low, Low’, Center,

High’, High (5 points)

BATT terminal voltage: 7.5V
PTT: ON

1.0W

±0.1W
1.0A or less

4. DQT
Balance

[Wide] 1

1) TEST CH: Low, Low’, Center,

High’, High (5 points)

Deviation meter ﬁ lter

    LPF: 3kHz
    HPF: OFF
  PTT: ON

Power
meter
Deviation
meter
Oscilloscope

ANT

Make the demodu-
lation wave into
square waves.

5. Maximum

Deviation

[Wide]

1) TEST CH: Center, Low, Low’,

High, High’ (5 points)

Deviation meter ﬁ lter

    LPF: 15kHz
    HPF: OFF
  PTT: ON

4.4kHz (According
to the , –)

±80Hz

Note:

FPU AUTO INPUT
1kHz/150mV

Summary of Contents for TK-P721

Page 1: ... FOR REPAIR 9 CIRCUIT DESCRIPTION 12 SEMICONDUCTOR DATA 17 COMPONENTS DESCRIPTION 18 PARTS LIST 19 EXPLODED VIEW 27 PACKING 28 ADJUSTMENT 29 PC BOARD TX RX UNIT X57 7880 22 34 SCHEMATIC DIAGRAM 38 BLOCK DIAGRAM 44 LEVEL DIAGRAM 46 SPECIFICATIONS 47 Button knob SIDE1 SIDE2 K29 9426 03 Knob Selector K29 9427 03 Knob Volume K29 9309 13 Plastic cabinet assy A02 4166 03 Button knob PTT K29 9425 03 Key ...

Page 2: ...properly terminated SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere This equipment should be serviced by a qualiﬁed techni cian only SERVICE This transceiver is designed for easy servicing Refer to the schematic diagrams printed circuit board views and alignment procedures contained within Model TX RX unit Frequency range Remarks TK P721 X57 7...

Page 3: ...rmation mode Self programming mode Mode Function User mode For normal use PC mode Used for communication between the trans ceiver and PC Mode Function Data programming mode Used to read and write frequency data and other features to and from the transceiver PC test mode Used to check the transceiver using the PC This feature is included in the FPU Wireless clone mode Used to transfer programming d...

Page 4: ...ts D sub connector KPG 22A 9 pin case that converts the RS 232C logic level to the TTL level The KPG 22A connects the SP MIC connector of the transceiver to the RS 232C serial port of the computer 3 4 KPG 22U Description USB programming interface cable Option The KPG 22U is a cable which connects to a USB port on a computer When using the KPG 22U install the supplied CD ROM with driver software in...

Page 5: ...able shown below will cover the frequency tables used for wireless cloning Wireless clone mode cannot be entered in battery low state A unit cannot be a Source Unit if it is unprogrammed If the S key is pressed an error tone will sound Once a unit is set to be the source it cannot be a target after the data has been transmitted This protects the data in the source unit MSK signaling is used in clo...

Page 6: ...layed if the entered password is correct If the password is incorrect SLF LOCK R SLF LOCK W is redisplayed 5 3 Channel Selection Mode In this mode the Zone or Channel can be selected Press and hold the S key for 2 seconds while turning the transceiver power on to enter self programming mode When the transceiver enters in the self programming mode the transceiver automatically enters the Channel Se...

Page 7: ...digit of the frequency blinks RX TX fre quency only The icon of the current signaling conﬁguration blinks RX TX signaling only A Abort the current settings and return to the Item Selection mode without backup B Toggle Decrease the blinking value C Toggle Increase the blinking value 5 6 Self Programming Mode ﬂow chart Channel selection mode ﬂow chart Data password S Power ON SLF LOCK R or Display S...

Page 8: ...NE OFF QT 67 0 DQT 023N DQT 023 I Selector A QT Selector A DQT N Selector S Tone off B C B C S S S B C A DQT I 5 RF power Hi Low S Hi Low selection Hi Low S Stored A Not stored Display 5 PWR HI B C 6 Scan Del Add S Del Add selection Del Add S Stored A Not stored Display 6 SCN ADD B C 7 Beat shift on off or 8 Compander on off S on off selection on off S Stored A Not stored Display 7 SFT ON or 8 CMP...

Page 9: ...ove the solder of the antenna terminal with a solder ing iron g 3 Remove the solder of the positive terminal with a solder ing iron h Note You can remove the TX RX unit from the chassis without removing the solder at the positive terminal However in this case you can not attach the packing G53 1605 03 that is on the positive terminal to the chassis in assembling So it is advisable to remove the so...

Page 10: ...ushed in this state where the two tabs come below the case surface there is a possibility of damaging the two tabs A thin spring Shaft Tow tabs A thick spring a b c d 6 Assembling the Battery Release Lever 1 Place the lever b onto the stopper a 2 Place the thick spring c onto the lever 3 Hook the right and left ends of the thin spring d onto the tabs of the stopper then place the thin spring onto ...

Page 11: ... antenna receptacle to the chassis in the or der shown in the drawing so that the antenna receptacle comes to the center of the case hole Tighten this screw second Tighten this screw first 10 The Nuts of the Volume Knob and Channel Knob Note that the shapes colors and heights of nuts of the volume knob and channel knob are different from one another The nut of volume knob is silver and the nut of ...

Page 12: ...RF AMP XF401 MCF Q405 IF AMP IC815 AF PA BPF1 1st Local BPF CF402 CF401 2 1 Front End RF Ampliﬁer Circuit The signal coming from the antenna passes through the transmit receive switching diode circuit D201 D202 D203 and D204 and a BPF L418 and L419 and is then ampli ﬁed by the RF ampliﬁer Q407 The resulting signal passes through a BPF L419 L418 L416 and L414 and goes to the mixer These BPFs are ad...

Page 13: ...1 R415 D402 CF401 CF402 C424 R423 R424 Q401 R426 50C AFOUT CD401 Q404 R409 IC402 R471 Fig 3 Wide Narrow switching circuit 2 5 Audio Ampliﬁer Circuit The demodulated signal from IC401 is sent to an AF am pliﬁer through baseband IC IC812 and is routed to an au dio power ampliﬁer IC815 where it is ampliﬁed and output to the speaker 2 6 Squelch Circuit Part of the AF signal from the IC401 enters the F...

Page 14: ...done to apply voltage to pin 1 of the TCXO The output of the TCXO is applied to pin 10 of PLL IC The VCO consists of 2 VCO and covers a dual range of 136 00 174 00MHz and 185 95 223 95MHz The VCO gen erates 185 95 223 95MHz for providing the ﬁrst local signal for reception The operating frequency is generated by Q5 in transmitting mode and Q4 in receiving mode The oscillation frequency is controll...

Page 15: ...H OFF L ON MCU XIN X802 39 40 XOUT XIN Q806 C846 R857 MCU BSHIFT Fig 7 Frequency shift circuit 5 2 Memory Circuit The Memory circuit consists of the MCU IC820 and EEPROM IC810 The EEPROM has a capacity of 512k bits and stores the channel information the last channel data the scan on status and other parameters EEPROM Note The EEPROM stores tuning data Deviation Squelch etc Realign the transceiver ...

Page 16: ...O When encoding the MSK DTMF the microphone input signal is muted 6 2 Decode QT DQT The output signal from the IF IC IC401 enters the MCU IC820 through IC812 IC820 determines whether or not the QT or DQT matches the preset value and controls the AFSW and speaker output sounds according to the squelch results 2 tone 5 tone Part of the received AF signal output from the IF IC IC401 passes through th...

Page 17: ...E O For FDT tool 40 CM_CLK O Baseband IC clock output SEMICONDUCTOR DATA Pin No Signal Name I O Function 41 CM_DTI I Baseband IC data input 42 CM_CNS O Baseband IC chip select output 43 DC_SW O APC voltage discharge switch 44 KEY1O O Key matrix output 1 45 KEY2O O Key matrix output 2 46 KEY3O O Key matrix output 3 47 KEY4O O Key matrix output 4 48 KEY1I I Key matrix input 1 49 KEY2I I Key matrix i...

Page 18: ...406 Mixer 1st mixer Q407 RF ampliﬁer RX VHF Q801 DC switching Blue LED Q802 DC switching 50T from 50M Q803 DC switching 50R from 50M COMPONENTS DESCRIPTION Ref No Use Function Operation Condition Q804 DC switching 33MS from 33M Q805 DC switching Green Red LED Q806 DC switching MCU clock shift circuit Q809 DC switching MIC mute Q810 811 Ampliﬁer AGC control Q813 DC switching Q814 control Q814 DC sw...

Page 19: ...0 150 220 330 470 750 s 4OLERANCE ORE THAN P Code C D G J K M X Z P No code 0 25 0 5 2 5 10 20 40 80 100 More than 10µF 10 50 20 20 0 Less than 4 7µF 10 75 s 6OLTAGE RATING 2nd word A B C D E F G H J K V 1st word 0 1 0 1 25 1 6 2 0 2 5 3 15 4 0 5 0 6 3 8 0 1 10 12 5 16 20 25 31 5 40 50 63 80 35 2 100 125 160 200 250 315 400 500 630 800 3 1000 1250 1600 2000 2500 2150 4000 5000 6300 8000 s HIP CAPA...

Page 20: ...B SIDE1 2 57 1B K29 9427 03 KNOB SELECTOR 58 1A K29 9492 12 KEY TOP 16 KEY A 2A N14 0848 05 CIRCULAR NUT SELECTOR B 2B N14 0849 05 CIRCULAR NUT VOL C 2B N30 2604 48 PAN HEAD MACHINE SCREW D 3A N30 2606 48 PAN HEAD MACHINE SCREW E 2B 3A N83 2005 48 PAN HEAD TAPTITE SCREW 60 2C N99 2046 05 SCREW SET ACCESSORY VR1 2A R31 0676 05 VARIABLE RESISTOR 62 1B T07 0787 05 SPEAKER 64 1B T91 0672 05 MIC ELEMEN...

Page 21: ...0PF J C253 CC73GCH1H060B CHIP C 6 0PF B C255 CC73GCH1H220J CHIP C 22PF J C256 CC73GCH1H070B CHIP C 7 0PF B C257 CC73GCH1H080B CHIP C 8 0PF B C264 CC73HCH1H470J CHIP C 47PF J C265 CC73HCH1H330J CHIP C 33PF J C271 CC73GCH1H030B CHIP C 3 0PF B C301 CK73HB1A104K CHIP C 0 10UF K C302 CK73HB1H471K CHIP C 470PF K C303 CK73FB1E225K CHIP C 2 2UF K C304 CK73HB1H471K CHIP C 470PF K C305 CC73HCH1H101J CHIP C ...

Page 22: ...GB0J106K CHIP C 10UF K C877 CK73HB1H102K CHIP C 1000PF K C878 CK73HB1E103K CHIP C 0 010UF K C879 CK73GB0J106K CHIP C 10UF K C881 CK73HB1A104K CHIP C 0 10UF K C882 CK73HB1H102K CHIP C 1000PF K C883 CK73HB1H152K CHIP C 1500PF K C884 CK73HB1A105K CHIP C 1 0UF K C885 CC73HCH1H181J CHIP C 180PF J C886 CC73HCH1H221J CHIP C 220PF J C887 CC73HCH1H121J CHIP C 120PF J C890 891 CK73HB1H391K CHIP C 390PF K C8...

Page 23: ...J 1 16W CP814 RK75HA1J474J CHIP COM 470K J 1 16W CP817 RK75HA1J473J CHIP COM 47K J 1 16W CP818 821 RK74HB1J103J CHIP COM 10K J 1 16W CP823 RK74HB1J103J CHIP COM 10K J 1 16W CP826 RK74HB1J103J CHIP COM 10K J 1 16W CP827 828 RK75HA1J473J CHIP COM 47K J 1 16W CP836 837 RK75HA1J102J CHIP COM 1 0K J 1 16W CP840 844 RK75HA1J103J CHIP COM 10K J 1 16W CP845 846 RK75HA1J472J CHIP COM 4 7K J 1 16W CP847 RK7...

Page 24: ... R 0 J 1 16W R429 RK73HB1J101J CHIP R 100 J 1 16W R433 RK73HB1J684J CHIP R 680K J 1 16W R434 RK73HB1J221J CHIP R 220 J 1 16W R435 RK73HB1J000J CHIP R 0 J 1 16W R436 RK73HB1J101J CHIP R 100 J 1 16W R437 RK73HB1J472J CHIP R 4 7K J 1 16W R438 RK73HB1J102J CHIP R 1 0K J 1 16W R439 RK73HB1J391J CHIP R 390 J 1 16W R440 RK73HB1J563J CHIP R 56K J 1 16W R441 RK73HB1J104J CHIP R 100K J 1 16W R442 RK73HB1J00...

Page 25: ...W R929 RK73HB1J102J CHIP R 1 0K J 1 16W R930 RK73HB1J101J CHIP R 100 J 1 16W R931 RK73HB1J000J CHIP R 0 J 1 16W R932 RK73HB1J103J CHIP R 10K J 1 16W R933 RK73HB1J102J CHIP R 1 0K J 1 16W R934 RK73HB1J472J CHIP R 4 7K J 1 16W R935 937 RK73HB1J103J CHIP R 10K J 1 16W R952 RK73HB1J331J CHIP R 330 J 1 16W R953 RK73HB1J472J CHIP R 4 7K J 1 16W R954 955 RK73HB1J121J CHIP R 120 J 1 16W R956 RK73HB1J471J ...

Page 26: ...TOR Q303 2SK1824 A FET Q304 LTC014EEBFS8 TRANSISTOR Q305 2SK1824 A FET Q306 LTA044EEBFS8 TRANSISTOR Q401 LTC044EEBFS8 TRANSISTOR Q403 KTC4080E P TRANSISTOR Q404 LTA044EEBFS8 TRANSISTOR Q405 KTC4080E P TRANSISTOR Q406 3SK318 FET Q407 3SK294 FP FET Q801 UPA672T A FET Q802 803 SSM6L05FU F FET Q804 SSM3J05FU F FET Q805 2SK1824 A FET Q806 2SC4919 S TRANSISTOR Q809 KTC4075E Y GR TRANSISTOR Q810 2SC4116 ...

Page 27: ... 702 27 19 14 16 39 VR1 C A B C Dx2 E E E E E E Ex2 Ex2 701 X57 28 101 46 15 Ex2 X57 107 X57 103 X57 102 X57 105 X57 109 A N14 0848 05 B N14 0849 05 C N30 2604 48 D N30 2606 48 E N83 2005 48 1 700 10 57 54 11 9 22 21 56 55 5 13 58 4 Parts with the exploded numbers larger than 700 are not supplied ...

Page 28: ... 2 1 D C 6 Instruction manual B62 2445 10 704 Protection bag 50 Belt clip KBH 10 3 Cap 60 Screw set 48 Holder SP MIC 706 Packing fixture 707 Item carton case Parts with the exploded numbers larger than 700 are not supplied ...

Page 29: ...r Supply 5V to 10V approx 3A Useful if ammeter equipped Antenna connector adapter The antenna connector of this transceiver uses an SMA terminal Use an antenna connector adapter SMA f BNC f or SMA f N f for adjustment The adapter is not provided as an option so buy a commercially available one Repair Jig Chassis Use jig part No A10 4215 03 for repairing the trans ceiver Place the TX RX unit on the...

Page 30: ...1 None MSK 1010 12 FleetSync 100 1000 FleetSync 100 1000 13 None Single Tone 1000Hz 14 2 tone A 304 7Hz B 3106 0Hz 2 tone A 304 7Hz B 3106 0Hz 15 None DTMF Tone 1477Hz 16 Single Tone 979 9Hz Single Tone 979 9Hz 17 None MSK PN9 18 None DTMF Code 3 Preparations for Tuning the Transceiver Before attempting to tune the transceiver connect the unit to a suitable power supply Whenever the transmitter is...

Page 31: ...ion Item Condition Measurement Adjustment Speciﬁcations Remarks Test equipment Unit Terminal Unit Parts Method 1 Frequency 1 TEST CH Center PTT ON f counter ANT TX RX FPU 155 100MHz 50Hz 2 High Transmit Power 1 TEST CH Low Low Center High High 5 points BATT terminal voltage 7 5V PTT ON Power meter Ammeter FPU 5 0W 0 1W 2 0A or less 3 Low Transmit Power 1 TEST CH Low Low Center High High 5 points B...

Page 32: ...z 8 DTMF Deviation Wide 1 TEST CH 1 Deviation meter ﬁlter LPF 15kHz HPF OFF PTT ON 3 0kHz 100Hz 9 MSK Deviation Wide 1 TEST CH 1 Deviation meter ﬁlter LPF 15kHz HPF OFF PTT ON 3 0kHz 100Hz Note Regarding deviation alignment item narrow value is calculated from wide alignment value Receiver Section Item Condition Measurement Adjustment Speciﬁcations Remarks Test equipment Unit Terminal Unit Parts M...

Page 33: ...5µV SSG MOD 1 5kHz 3 Tight Squelch Wide 1 TEST CH Center High Low 3 points SSG otuput 115dBm 0 40µV SSG MOD 3 0kHz Narrow 2 TEST CH Center High Low 3 points SSG otuput 114dBm 0 45µV SSG MOD 1 5kHz 4 Low RSSI Wide 1 TEST CH Center Low High 3 points SSG otuput 120dBm 0 22µV SSG MOD 3 0kHz Narrow 2 TEST CH Center Low High 3 points SSG otuput 120dBm 0 22µV SSG MOD 1 5kHz 5 High RSSI Wide 1 TEST CH Cen...

Page 34: ...NT CN805 SB CN816 RXD CN819 TXD CN820 LSDO C5 C8 C465 D821 D820 D829 R104 CP818 CP819 R702 R704 R706 CP820 R708 R709 CP823 R710 R711 1 S A B C 2 3 R712 CP843 R5 F801 R986 CN1 CVIN L801 CN2 CV C10 C12 R105 CP844 D825 D826 R984 R983 D828 R988 D827 R987 4 5 6 7 8 9 0 C968 TX RX UNIT X57 7880 22 Component side view J79 0287 39 TK P721 PC BOARD Ref No Address IC301 3N IC810 4K IC815 7O IC820 6L IC821 8...

Page 35: ...04 C806 R 8 5 4 Q303 Q306 C 8 5 0 R104 R313 R314 R315 4 5 1 8 R316 R317 CP818 R319 CP819 R320 CP820 CP827 CP828 C308 CP847 C314 C315 1 8 GND DOWN UP GND AFO AFI SB B R932 R933 R 9 3 7 R954 R982 4 5 1 8 C948 R802 R803 R811 R813 R818 R821 R829 R 8 3 0 R 8 3 1 CN815 TXD R832 C N 8 1 7 M N D N CN821 SCLK CN824 GND R 8 5 5 C 8 3 2 C 8 3 3 C834 R 8 7 1 R 8 7 2 C837 R880 C 8 5 9 D801 D804 D805 R105 IC820...

Page 36: ... G S D L206 L207 L210 L211 L213 L216 L220 R211 R212 R214 R225 C203 C204 C210 C211 R447 R448 R449 R452 R453 R455 R457 R849 R461 X802 C825 C828 C264 C265 R881 R885 R887 D407 C470 C475 C477 C478 C479 C865 D807 D808 C480 C481 C485 C874 C877 C881 C884 IC812 R905 R906 R910 R914 C906 C911 L202 L203 Q811 L415 L416 R202 R205 R206 R207 R226 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 Layer 5 La...

Page 37: ...0 810 Q820 R98 R99 CP1 C11 C15 C16 C17 C18 C19 R209 J79 0287 39 D402 R225 C203 R435 R447 R451 R847 C438 C825 R865 R867 R868 4 5 1 8 R869 R876 R877 C840 C264 R884 R885 D405 C468 C852 R890 R891 R892 C857 R894 R895 R899 C863 C873 C874 C C881 C883 C884 C885 C886 C887 C892 IC812 C896 IC817 3 4 1 5 R904 R905 R908 R909 R910 R911 R912 C901 C904 C907 C909 C910 C913 R963 C949 Q811 L222 R202 R205 R422 R423 R...

Page 38: ... D D R 8 1 1 2 7 0 C 9 6 4 2 2 u C P 8 2 3 10kx2 CP821 10kx4 INT 2SK1824A Q805 R 1 0 4 1 0 k C 8 2 6 0 1 u C 8 1 6 1 u C819 1000p C 8 0 4 1 0 0 0 p C P 8 4 0 10kx2 D801 B30 1790 05 C P 8 4 1 10kx2 R936 10k D805 B30 2315 05 R822 1k R 8 1 7 2 2 k L302 CN801 E40 6827 05 1 B 2 SB 3 AFI 4 AFO 5 GND 6 UP 7 DOWN 8 GND C 8 0 6 1 0 0 0 p C 9 4 8 1 0 0 0 p SB D806 RKZ5 1B2KG S2 IC805 XC61CN4502M G C P 8 4 4...

Page 39: ...D 26 EM_CLK 27 APCSW 28 TX RX 29 5VC 30 5TC 31 EP_DTO 32 EP_CLK 33 CM_DTO 34 EMP 35 5RC 36 EP_WP 37 EP_DTI 38 EP_CS 39 CE 40 CM_CLK 4 1 CM_DTI 4 2 CM_CNS 4 3 DC_SW 4 4 KEY1O 4 5 KEY2O 4 6 KEY3O 4 7 KEY4O 4 8 KEY1I 4 9 KEY2I 5 0 KEY3I 5 1 KEY4I 5 2 PF1 5 3 PF2 5 4 LCDBL 5 5 LC_INH 5 6 LC_CLK 5 7 LC_DAT 5 8 LC_CE 5 9 LC_MOD 6 0 HSDDEC 61 QT DQT 62 CVIN 63 BATT 64 VOX 65 BUSY 66 TH_DET 67 RSSI 68 WID...

Page 40: ... 330 C 1 4 0 0 4 7 u C 8 7 3 0 0 1 u R 1 0 1 2 k R897 27k R898 2 2k C 1 1 0 0 p R 9 6 3 1 8 0 k C 2 7 0 2 2 u R29 470k R5 10k R962 10k C 8 3 7 1 0 0 0 p R824 820k D R 8 8 7 1 0 R 8 8 3 0 C 1 7 1 0 0 p C874 0 1u R 2 6 1 M C 8 8 4 1 u C 8 4 6 5 p C 1 6 1 0 0 p R 8 7 7 1 M R882 0 R9 100 R900 100k R899 120k R99 L1 4 7u C 8 6 5 4 7 0 p R 8 9 5 3 9 0 k C P 8 1 2 1kx2 R 8 8 4 5 6 0 k R 8 2 0 1 0 0 k C 8 ...

Page 41: ...D809 KDR731 R912 0 D 1 4 H V C 3 7 5 B E C949 1000p C77 18p C 4 3 1 0 0 p R 6 3 1 k R45 22 R 4 1 2 7 0 D807 KDR731 L2 15n C 3 3 4 7 p C 4 0 7 0 1 u L 1 0 3 3u R 4 9 1 0 k D 1 6 C 9 0 0 1 u C 5 9 1 5 p C 5 0 0 1 u R17 0 C 8 7 1 0 0 0 p KTC4075E Y GR Q809 R 4 0 6 1 8 k C410 22p R 5 0 47 R 4 1 5 1 8 k C896 0 1u R910 10k C 8 6 2 2 p C47 82p R902 10k R 1 8 390 L402 100n C 7 8 1 u L4 IC817 TC75S51FE F 1...

Page 42: ...0 0 0 p R438 1k C209 30p R421 3 3k R315 10k C 3 0 9 4 7 0 p C 3 1 4 4 7 0 p 2SC5455 A Q203 R 4 2 7 6 8 k KTC4080E P Q405 C433 0 01u C447 3p B C 4 4 1 1 0 0 0 p C201 1000p R 2 2 2 0 RD01MUS1 T113 Q204 R422 3 3k R 4 4 4 1 0 0 k C429 33p C 4 2 2 1 0 u L 2 0 7 CD401 L79 1866 05 C265 33p R203 10 R303 560 BUSY R 3 1 6 5 6 k C452 1000p R417 150k C 4 2 0 1 8 0 0 p RSSI C 3 0 5 1 0 0 p L 4 1 1 1 5 0 n C 3 ...

Page 43: ...47kx2 TXD D201 HVC131 C 4 6 4 3 9 p R448 0 C487 10p B C 4 6 2 1 0 0 0 p L 4 1 6 6 8 n C 2 2 8 1 3 p D 8 0 3 G N 1 G D 4 0 5 R 9 2 7 4 7 k R 4 5 6 1 5 0 k C 8 1 1 1 0 0 0 p C 2 3 6 3 9 p R929 1k L415 Q817 R 4 5 5 1 0 0 k C 4 6 5 1 0 0 0 p T H 2 0 1 100k 2SB1694 Q814 R 9 1 8 4 7 k C 4 8 1 4 7 p L 2 1 1 C 9 1 7 1 0 0 0 p PTT RXD R 4 5 1 4 7 0 k C 9 2 0 1 u J802 E11 0703 05 PTT RXD MIC MICIN OPTDET 5M...

Page 44: ... D806 RKZ5 1B2KG RESET IC807 XC6120N302N G 33MSC 33MS D803 GN1G BATT 7 5V EN2 EN1 PTT PF1 PF2 SB D801 B30 1790 05 D805 B30 2315 05 D804 B30 2314 05 Q801 1 2 UPA672T A Q805 2SK1824A LEDBLU LEDRED LEDGRE XIN 33M 33M EP_ CLK EP_ DTO EP_ DTI 19 200MHz IC820 F363BEDFEKDLE IC808 NJM2904RB1 ZB IC810 M95512 RDW6TP V 16 8MHz 33M EP_WP EP_CS Q801 2 2 SB FUSE 2 5A F801 F53 0324 15 FUSE 1 0A F802 F53 0319 15 ...

Page 45: ...SC5636 50C Q8 2SC5636 42C C TX RX F F B PC BPF2 IC811 HA1630D03MM BPF1 33MS 33B CM_CNS CM_CLK CM_DTO LSDO TXTONE MICFB MIC_MT D807 D808 KDR731 Q809 KTC4075E Y GR Q810 2SC4116 GR F Q811 2SA1586 Y GR F IC817 TC75S51FE F D809 KDR731 D810 MC2850 MIC VOLIN DETAF IC815 TA7368FG Q818 2SK3577 A Q819 2SK3577 A Q817 LTC044EEBFS8 Q814 2SB1694 SB Q813 LTC014EEBFS8 AF MUT INT SP MIC 1st Local 50T APCSW 2nd Loc...

Page 46: ...CO C73 5 2dBm C77 2 2dBm C209 5 3dBm C222 18 5dBm C243 36 2dBm ANT 50Ω MIC 5mVrms 216mVrms 1 5dBm 38 2dBm C264 11 8dBm C217 Q8 Q9 RXLo D17 D18 Q201 Q203 Q204 Q205 AF 1kHz RF CENTER FREQUENCY R897 To make measurements in the AF section connect the AC level meter ANT input 53dBm 1kHz FM 1 5kHz Dev Narrow In the RF section use a high impedance probe ANT input 53dBm MOD off AG is set to the MIC input ...

Page 47: ...x 21 D mm 180g With KNB 45L 2000mAh battery 54 W x 122 H x 33 7 D mm 300g RECEIVER Measurements mode per TIA EIA 603 Sensitivity EIA 12dB SINAD 0 25µV Wide 0 28µV Narrow Selectivity 70dB Wide 60dB Narrow Intermodulation Distortion 70dB Wide 60dB Narrow Spurious Response 70dB Audio Output 500mW 8 TRANSMITTER Measurements mode per TIA EIA 603 RF Output Power 5W 1W Spurious Response 70dB Modulation 1...

Page 48: ...TK P721 ...

Page 49: ...R313 R314 R315 4 5 1 8 R316 R317 CP818 R319 CP819 R702 R704 R706 R320 CP820 R708 R709 CP823 CP827 CP828 R710 R711 1 S A B C 2 3 R712 CP843 C308 CP847 C314 C315 1 8 GND DOWN UP GND AFO AFI SB B R932 R933 R 9 3 7 R954 R5 F801 R982 4 5 1 8 C948 R986 CN1 CVIN L801 CN2 CV C10 C12 R802 R803 R811 R813 R818 R821 R829 R 8 3 0 R 8 3 1 CN815 TXD R832 C N 8 1 7 M N D N CN821 SCLK CN824 GND R 8 5 5 C 8 3 2 C 8...

Page 50: ... L210 L211 L213 L216 L220 R211 R212 R214 R225 C203 C204 R435 C210 C211 R447 R448 R449 R451 R452 R453 R455 R457 R847 R849 R461 X802 C438 C825 C828 R865 R867 R868 4 5 1 8 R869 R876 R877 C840 C264 C265 R881 R884 R885 R887 D405 D407 C468 C852 R890 R891 R892 C857 R894 C470 R895 R899 C475 C477 C478 C479 C863 C865 D807 D808 C480 C481 C485 C873 C874 C877 C881 C883 C884 C885 C886 C887 C892 IC812 C896 IC817...

Page 51: ...0 p C478 1000p C 9 0 0 4 7 0 p C405 0 1u R 5 2 1 0 k R908 100k R 8 9 5 3 9 0 k C P 8 1 2 1kx2 R 4 2 7 6 8 k R 8 8 4 5 6 0 k R 4 1 1 1 0 k KTC4080E P Q405 CP820 10kx4 L 1 7 2 2 n C433 0 01u R844 0 C 5 2 3 p R 8 0 5 1 0 0 k C 4 6 8 2 7 p C447 3p B C 4 4 1 1 0 0 0 p C201 1000p R 2 2 2 0 D809 KDR731 RD01MUS1 T113 Q204 R 8 2 0 1 0 0 k C P 8 1 7 47kx2 C 8 9 1 3 9 0 p CP1 100x4 R422 3 3k R912 0 TXD D 1 4...

Page 52: ...2 SB D801 B30 1790 05 D805 B30 2315 05 D804 B30 2314 05 Q801 1 2 UPA672T A Q805 2SK1824A LEDBLU LEDRED LEDGRE XIN 33M 33M EP_ CLK EP_ DTO EP_ DTI 19 200MHz IC820 F363BEDFEKDLE IC808 NJM2904RB1 ZB IC810 M95512 RDW6TP PC BPF2 IC811 HA1630D03MM BPF1 33MS 33B CM_CNS CM_CLK CM_DTO LSDO TXTONE MICFB MIC_MT D807 D808 KDR731 Q809 KTC4075E Y GR Q810 2SC4116 GR F Q811 2SA1586 Y GR F IC817 TC75S51FE F D809 K...

Search results

Summary of Contents for TK-P721

Reviews:

Kenwood TK-P721, Service Manual, Page: 31 / 52

Search results

Summary of Contents for TK-P721

Reviews: