Kenwood FleetSync TK-790 Service Manual Download Page 27 | Manualshive

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27

TK-790/

(

B

)

/H

(

B

)

2. Receiver Circuit

Incoming signals from the antenna pass through a low-

pass filter in the final unit of the transmitter system, and are
switched to the front-end of the receiver system via a re-
ceive/transmit switch (switching diode D3 and D4 : TK-790/
(B), switching relay K1 : TK-790H(B)).

The signal is then passed through an antenna matching

coil. After passing through the BPF (L.C filter), it is amplified
by the RF amplifier (Q101). The tuned varactor BPF
(L110~112) is then passed, and it enters the 1st mixer.

The 1st mixer use a double balanced mixer (A101). The

DBM is an excellent IM (intermodulation distortion) and im-
age. The 1st mixer mixes the signal with the 1st local oscil-
lator frequency and converts it to the 1st IF (44.85MHz).
The signal is amplified by the 1st IF amplifier 1 (Q102).

The signal then passes through two monolithic crystal fil-

ters (XF101 : Wide, XF102 : Narrow) to remove unnecessary
nearby frequency components. The signal from the XF101
or XF102 is used as the 1st IF signal.

The 1st IF signal is amplified by 1st IF amplifier 2 (Q107)

and fed into IC101 in the FM IF IC. The IF signal is then
mixed with the 2nd local oscillator frequency of 45.305MHz
to generate the 2nd IF of 455kHz. The 455kHz signal is then
passed through a ceramic filter (CF101, CF103 : Wide,
CF102, CF104 : Narrow) and fed back into IC101 for addi-
tional amplification.

The AF signal output from IC101 then passes through

the control unit's HPF and D/A converter IC. After entering
the AF power amplifier (IC522), the signal is output from the
speaker.

CIRCUIT DESCRIPTION

Item

Rating

Nominal center frequency

44.85MHz

Pass bandwidth

±

5.5~7.5kHz or more at 3dB

Attenuation bandwidth

±

25kHz or less at 40dB

Ripple

1.0dB or less

Insertion loss

3.0dB or less

Guaranteed attenuation

85dB or more at fo+400~+1000kHz

fo–200~–1000kHz

Terminating impedance

3.2k

Ω

/ –1.0pF

Table 1

Crystal filter (L71-0512-05) : Wide

(TX-RX unit XF101)

Item

Rating

Nominal center frequency

44.85MHz

Pass bandwidth

±

3.5kHz or more at 3dB

Attenuation bandwidth

±

15kHz or less at 40dB

Ripple

1.0dB or less

Insertion loss

4.0dB or less

Guaranteed attenuation

85dB or more at fo+400~+1000kHz

fo–200~–1000kHz

Terminating impedance

3.0k

Ω

/ –0.5pF

Table 2

Crystal filter (L71-0513-05) : Narrow

(TX-RX unit XF102)

Fig. 5

Receiver circuit

ANT

SW

LPF

L7,5,4

LPF

L9,8,7

D3,4

ANT

BPF

IC101

IC504

IC515

AMP

HPF

BEF

RF AMP

Q101

RF AMP

Q104

BPF

L110~112

1st MIX

A101

LPF

TV

D306

ANT

T/R

SW

RA

K1

CF103 CF101

Ceramic

filter

WIDE

CF104 CF102

Ceramic

filter

NARROW

X101

45.305

MHz

FM SYSTEM IC

NOISE

AMP

NOISE

DET

RSSI

DET

RSSI

DET

Q109

D103

SQ

455kHz

1st IF AMP2

Q107

1st IF AMP1

Q102

MCF

XF101

MCF

XF102

WIDE

NARROW

44.85MHz

VCO

RX VCO

f

RX

+44.85MHz

IC518

(2/2)

IC524

(1/2)

IC524

(2/2)

DE-EMP

EXP

IC512

IC518

(1/2)

IC522

VOL

BUFF

AF PA

VOL

IC516

CPU

27

26

RSSI

ASQ

SP

FINAL UNIT : TK-790H(B)

TX-RX UNIT

CONTROL UNIT

DISPLAY UNIT

FINAL UNIT : TK-790/(B)

Fig. 6

Double balanced mixer

LO

GND

GND

GND

IF

RF

2

1

3

4

5

6

«
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26
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29
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Summary of Contents for FleetSync TK-790

Page 1: ...et Lower A01 2162 02 Knob K29 4664 04 x 2 TK 790 or TK 790 B with KCH 10 KCH 11 TK 790H B This service manual applies to products with 30300001 or subsequent serial numbers KCH 10 and KCH 11 are applicable to the productions June 2001 and after In terms of the products with the serial numbers earier than 30300001 refer to the TK 790 B H B service manual as per part No B51 8438 00 and the TK 790 B ...

Page 2: ...nt as of this publica tion date Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions which are issued as required ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment informa tion the full part identification number should be included This applies to all parts components kits and chassis If the part number is not known include the...

Page 3: ...e trunk lid and vehicle chassis using ground straps to ensure the lid is at chassis ground 4 3 Radio The universal mount bracket allows the radio to be mounted in a variety of ways Be sure the mounting surface is adequate to support the radio s weight Allow sufficient space around the radio for air cooling Position the radio close enough to the vehicle operator to permit easy access to the control...

Page 4: ...K 7DB Dual band remote kit KRK 6DH Dual control head kit KCH 10 KCH 11 KCH 10 KCH 11 KCH 10 KCH 10 KCH 10 KCH 11 KCH 11 KCH 11 or or or or KCT 22M M2 M3 Control cable YES YES See Remote kit service manual NO NO See page 16 See page 16 See page 16 YES KRK 8DBH Dual band dual control head kit KCH 10 KCH 10 KCH 10 KCH 11 KCH 11 KCH 11 or or YES YES Frequency range 148 174MHz 148 174MHz YES See Remote...

Page 5: ...itor If MON is pressed once while Default setting MON the RADIO is waiting for reception of MON Full all signalling squelch is canceled function panel If MON is held down for 2 seconds all singalling noise squelch is canceled and the QT DQT audio is unmuted 2 TONE DTMF Scan Start and stop the scanning Default setting SCN sequence of SCN Full function panel Public The RADIO works as a PUBLIC Addres...

Page 6: ... only Dimmer Use this function to adjust the LCD DIM backlight brightness Key backlight TX BUSY LED and DTMF Mic Key backlight ON OFF Function Description Note Key top name Speaker 1 2 Each speaker audio can be Dual HEAD Mute SPM manually disabled from the configuration other control head only Channel UP If is pressed once the channel increases by one step If is held down for 1 second the channel ...

Page 7: ... To select a Group Select a Group by rotating the UP DOWN Knob which has been programmed with Group UP DOWN or by pressing the Keys which have been programmed with Group UP and Group DOWN If the Channel Tracking Function is enabled the chan nel number will not change 4 To Select a Channel Select a Channel by rotaing the UP DOWN Knob which has been programmed with Channel UP DOWN or by pressing the...

Page 8: ...rates in carrier squelch scan 5 Adding Channels and Groups to the Scan Sequence 1 Channels To add the currently displayed channel to the scan se quence press D A Key The CH ADD indicator lights and the channel is added to the scan sequence 2 Groups To add the currently displayed group of channels to the scan sequence hold down the D A Key for 2 seconds The GR ADD indicator lights and the group is ...

Page 9: ...on tone sounds the display returns to the normal channel or SCAN display and the IC function will turn off 14 Home Channel HC This feature allows the radio operator to immediately se lect a pre determined Home Channel by pressing the HC Key HC can be activated as follows CASE1 HC has been set as HC Fixed Non Scan Scanning Scan Mode temporary stopping press HC once Change to Home Channel press HC a...

Page 10: ...play TX BUSY Panel Keys Microphone backlight LED backlight Keys backlight Default High High High High Press DIM Medium once Press again Low Press again OFF OFF OFF OFF Press again return to return to return to return to High High High High The brightness setting is memorized 22 Speaker 1 2 Mute SPM Dual Head Configuration only This feature allows the radio operator to manually disable the speaker ...

Page 11: ...o Reset has been programmed and 4 receiving reset code Primary code or secondary code 28 Time Out Timer Possible to configure to each group The Time Out Timer function interrupts continuous trans mission after a specified time elapses Holding down PTT for longer than the programmed time causes the RADIO to stop transmitting and sound a warning tone To stop the warning tone release PTT 29 Signallin...

Page 12: ...OFF Low Monitor ON OPERATING FEATURES 36 2 PF Output Port AUX A Pressing AUXA once Low Pressing A AUXA again OPEN COLLECTOR AUX B Pressing AUXB once Low Pressing B AUXB again OPEN COLLECTOR AUX C Pressing AUXC once Low Pressing C AUXC again OPEN COLLECTOR TOR Receiving correct QT DQT Low Not receiv ing correct QT DQT OPEN COLLECTOR COR BUSY Low Not BUSY OPEN COLLECTOR 37 Timed Power Off This funct...

Page 13: ...44D The programming software can be used with an IBM PC or compatible machine Figure 1 shows the setup for pro gramming Fig 1 KPG 43 IBM PC KPG 44D 41 2 Programming Interface Cable KPG 43 Description The KPG 43 is required to interface TK 790 to the com puter It has a circuit in its D sub 25 pin connector case that converts RS 232C logic level to TTL level KPG 43 is used to connect between TK 790 ...

Page 14: ...nter Each Mode Mode Operation User mode Power on PC mode Connect the PC and turn the power on Then the radio can be controlled by the FPU Panel test mode Hold down the PF1 key turn the radio power on Panel tune mode Press the GR key from the panel test mode Clone mode Hold down the PF5 key turn the radio power on Firmware Hold down the PF2 key turn the radio programming mode power on 43 PC Tuning ...

Page 15: ...ect the slave group with Up Down knob 4 Press the PF5 key to start cloning Note The transceiver does not enter the clone mode if it is disabled with the FPU To clone the transceiver both trans ceivers must be same If the panels frequency ranges op tional board are different they cannot be cloned Master side display TX LED on TX LED off END Slave side display PC G CLONE GROUP CLONE GRP 1M GROUP 1M ...

Page 16: ...the KCH 10 or KCH 11 3 Install the KCH 10 or KCH 11 on the radio using the screws N32 3006 46 1 supplied with the front panel kit Take care not to get the lead between the KCH 10 or KCH 11 and an edge of the case You can install the panel upside down if necessary to install the radio 4 Reinstall the upper and lower halves of the case 5 Connection the short plug for the accessory connector 9 pins o...

Page 17: ... input MCO MIC signal output DEI Detection signal input AC Audio control signal output BC1 Scramble code output 1 BC2 Scramble code output 2 BC3 Scramble code output 3 BC4 Scramble code output 4 TXD2 RXD2 DEO Detection signal output PTO PTT signal output 8C 8V output E Earth Fig 5 3 2 Voice scrambler board connection Modification 1 Remove the upper half of the case of the TK 790 2 Remove R515 and ...

Page 18: ...l head then clamp the bottom of the rubber cap with the supplied tie wrap 4 Remove the upper half of the case of the TK 790 5 Set jumper resistors 0 ohm R504 R506 R742 and R743 on the control unit X57 561 B 3 as shown in Table 1 Refer to page 21 6 Reinstall the upper half of the case Note If the KCT 18 is used for the KRK 8DBH use the 9 pin plug on the back of radio 1 or the 12 pin plug on the bac...

Page 19: ...e number 6 Fig 8 3 4 Attach the connector to the external speaker connector on the radio 6 2 Connection for the KES 4 with the remote kit KRK 5 KRK 6DH KRK 7DB KRK 8DBH When output is from the 12 pin accessory con nector on the rear of the control head remote operation Modification of plug 12 pin 1 Remove the plug from the accessory connector 12 pins on the rear of the control head 2 Cut off the e...

Page 20: ...ng jumper resistors 0 ohm R640 and R641 on the control unit X57 561 B 3 Refer to page 21 1 MIC signal input output This pin is directly connected to the MIC input pin of the transceiver so it has the same function as the MIC input pin When the input is 5mV 3 kHz DEV 600 ohms modulation is obtained The MIC input is output from the transceiver panel as it is 2 Data audio input The signal from this p...

Page 21: ...ide view Accessory terminal function Page 20 R640 641 Accessory terminal function Page 20 Connection with the remote kit Page 20 Connection with the remote kit Page 20 Connection with the remote kit Page 20 Horn alert Page 20 External speaker Page 18 Ignition sense cable KCT 18 Page 18 Ignition sense cable KCT 18 Page 18 Voice Scrambler Page 17 R515 Voice Scrambler Page 17 ...

Page 22: ...s CN104 CN203 from the final unit and remove the flat cable CN202 upwards from the control unit CN502 3 Remove the 5 screws 4 5 3 3 3 3 3 3 3 4 1 1 1 1 1 4 4 4 4 7 7 7 7 7 7 7 5 6 2 1 1 1 1 CN203 CN104 CN201 Final unit TX RX unit Control unit 3 Removing the Final Unit X57 561 C 3 1 Remove the 2 screws 5 holding the power module to the frame 2 With a screwdriver remove the leaf spring 6 holding the...

Page 23: ...inal unit and remove the flat cable CN202 upwards from the control unit CN502 3 Remove the 5 screws 4 3 Removing the Final Unit X45 356 1 Remove the 2 hexagonal bosses 5 2 Remove the 3 screws 6 holding the power module and transistor to the frame 3 Desolder the power module 4 Remove the 1 screw 7 holding TH1 5 Remove the 4 screws 7 holding the final transistor 6 Remove the 2 screws 8 holding the l...

Page 24: ... connector CN505 from D sub connector 25P on the rear 1 3 3 3 1 2 Leaf spring Screw driver IC CN502 CN501 CN506 CN505 5 Removing the Accessory Connector on the Rear 1 Confirm that the screw holding DC cable red and the screw holding DC cable black of the final unit are re moved and that CN506 of the control unit X57 561 B 3 is disconnected Remove the 4 screws on the rear 3 2 Pull out the connector...

Page 25: ...3 screws 6 You can remove the display units X54 3190 A 3 and C 3 7 and 8 7 Remove the 3 screws 9 and remove the sub panel 10 and keytop 11 7 Disassembly of the Display Unit X54 3200 KCH 11 1 Pull out the VOL and UP DOWN knobs 1 2 Remove the 2 hexagnal nuts 2 3 Remove the waterproof seal 3 4 Disconnect the connector CN4 of the display unit X54 3200 A 2 and remove the 5 screws 4 you can remove the u...

Page 26: ... reflected wave level increases Reflected waves are detected by D6 and the output level is fed to the differential amplifier lead ing to the transmitter output power being reduced in the way already described POWER MODULE ANT SW FWD DET REF DET LPF LPF CM coupler APC DRIVE DC AMP DC AMP Differential AMP 8T B DB Q1 Q3 D3 4 D5 D6 VR1 Q5 Q6 PC B DO FINAL UNIT X57 C 3 Fig 3 1 4 Final amplifier section...

Page 27: ...e AF signal output from IC101 then passes through the control unit s HPF and D A converter IC After entering the AF power amplifier IC522 the signal is output from the speaker CIRCUIT DESCRIPTION Item Rating Nominal center frequency 44 85MHz Pass bandwidth 5 5 7 5kHz or more at 3dB Attenuation bandwidth 25kHz or less at 40dB Ripple 1 0dB or less Insertion loss 3 0dB or less Guaranteed attenuation ...

Page 28: ...l The DC signal from the pin 14 of the PLL IC passes through the active low pass filter loop filter is applied to the VCO and controls to keep the frequency of the VCO The serial data DT CP EP from the microprocessor IC516 is input to the PLL IC And PLL lock condition is al ways monitored by the pin 28 UL of IC516 CIRCUIT DESCRIPTION Fig 8 3 Squelch Circuit The output from IC101 enters FM IC again...

Page 29: ...ower Off TPO function POF is controlled by CPU s TPO function POF is to turn the transceiver off The POF logic signal is feed through Q507 and Q506 then 8 pin of IC501 to turn the transceiver off 3 Turning the transceiver on with IGN SENS then turning the transceiver off with TPO function If IGN is turned on Q543 and Q542 are turned on then the IC501 detects the change IC501 outputs the signal to ...

Page 30: ... SW DM1 DM2 DM1 DM2 DM1 DM2 SB KEY BACK LAMP LCD BACK LAMP S5 PF1 S6 PF2 S7 PF3 S8 PF4 S9 PF5 S1 POWER S2 S3 IC2 RH5VL42C PTT HK D13 RX D17 TX IC3 AT24C64N10SI27 EEPROM AF VR IC1 NJM78L05UA ENCODER SB HK ME MIC E TRD DM BLC PTT INT SP MIC 1 2 TRD RS1 RS2 SB PS RST ED1 IC4 78064GCXXX8EU Microprocessor CPU containing LCD driver The on off signals of keys other than the power switch and the PTT and H...

Page 31: ...displayed on the 14 digits and 3 digits dot matrix alphanumeric display Dimmer function From the control of the CPU s DM1 DM2 port you can switch the LCD KEY backlight busy TX LED or the optional KMC 28 key backlight as shown in the following table Dimmer LCD KEY Busy TX KMC 28 setting H H ON ON ON M M ON ON ON L L ON ON ON OFF OFF OFF OFF OFF RST RST D19 5V AVR LCD ASSY SW SW SW SW SW SW SW SW RE...

Page 32: ...CS Microprocessor 784214GCXXX8EU Control Unit IC516 Terminal function Pin No Pin name I O Action 40 RXD1 I Serial interface RXD 41 TXD1 O Serial interface TXD 42 STB O Modem STB 43 EC1 O Shift registerl Control CS 44 EI O Shift register Interface CS 45 SEL I O GE STAR I O 46 EPT I GE STAR EPT 47 EMG O GE STAR EMG 48 71 Flash ROM access port 72 VSS GND 73 74 Flash ROM access port 75 Flash ROM 4Mbit...

Page 33: ...11 GRN O BUSY LED Green L ON H OFF 12 E GND 13 DM1 O Backlight Dimmer 14 DM2 O Backlight Dimmer 15 I Not used 16 K11 I SCN key Full L ON H OFF 17 K12 I PF8 key Full L ON H OFF 18 K13 I PF9 key Full L ON H OFF 19 K1 I PF4 key L ON H OFF 20 K2 I PF5 key L ON H OFF 21 1 2 I HEAD 1 2 jumper HEAD 1 Jumper installed HEAD 2 Jumper removed 22 B F I Panel type Jumper Basic panel Jumper installed Full panel...

Page 34: ...TIONS thermal short circuit stand by reference voltage mute reference voltage mute switch 16 14 6 OUT1 8 OUT2 power stage mute switch VA Cm 18kΩ 60 kΩ 2 kΩ _ power stage mute switch VA Cm 18kΩ 60 kΩ 2 kΩ _ 1 GND S 9 2 input reference voltage NC 7 15 11 GND1 GND2 VP1 VP2 5 13 OUT 4 OUT 3 10 12 17 4 INV 1 1 INV 2 3 RR INV 4 INV 3 MODE VDIAG SEMICONDUCTOR DATA Shift register 2 on control unit IC517 P...

Page 35: ...V VEBO Emitter base voltage 4V VCEO Collector emitter voltage RBE 16V Ic Collector current 20A Pc Collector dissipation 220W Tj Junction temperature 175 C Tstg Storage temperature 65 to 175 C Flash ROM AT29C020 90TI Control Unit IC519 Terminal description Pin Name Function A0 A17 Addresses CE Chip enable OE Output enable WE Write enable I O0 I O7 Data inputs outputs NC No connect OE CE AND WE LOGI...

Page 36: ...nction Operation Condition IC203 AVR Input SB Output 9V IC301 PLL IC 1 CP 2 DT 3 EP 4 Vss 5 Fin 7 Vcc 8 REFin 16 8MHz 14 Charge pump output 18 UL H when lock 20 VDD 5V Q101 1st amplifier RX frequency Q102 IF amplifier 44 85MHz Q104 Mix local amplifier RX frequency 44 85 MHz Q105 DC switch ON when wide Q106 DC switch On when narrow Q107 IF amplifier 44 85MHz Q108 DC switch On when wide Q109 SQL amp...

Page 37: ...sh the power switch Q519 Power switch On when the power switch on Q520 DC switch On when horn alert Q522 Beat shift switch On when beat shift DESCRIPTION OF COMPONENTS Ref No Use Function Operation Condition Q523 DC switch Serial data inverter Q524 DC switch Serial data transmitter Q525 DC switch Q526 527 DC switch On when compander on Q528 529 DC switch On when compander off Q530 532 DC switch On...

Page 38: ...D13 TX LED D16 17 Surge absorption D19 21 Surge absorption D24 DC switch Key lighting ON D25 DC switch DESCRIPTION OF COMPONENTS Display Unit X54 3200 20 KCH 11 Ref No Use Function Operation Condition IC1 AVR Input SB Output 5V IC2 Reset IC3 EEPROM IC4 CPU Q1 9V AVR Q2 DC switch key lighting ON Q3 DC switch Dimmer Hi Low ON Q4 DC switch MON PF6 PF7 key lighting ON Q5 DC switch PF1 PF2 PF3 key ligh...

Page 39: ... HARDWARE FIXTURE DC ACC J21 8417 04 HARDWARE FIXTURE KCH 10 MIC CONNECTOR 48 2I J29 0422 13 BRACKET ACSY J39 0625 04 SPACER KCH 10 TX BUSY 50 2I J61 0307 05 BAND ACSY K29 4664 04 KNOB KCH 10 VOL UP DOWN 53 2I K29 4704 04 KNOB ACSY K29 5251 12 KEY TOP KCH 10 55 2I K29 5276 03 KNOB ACSY 56 2I K29 5277 03 KNOB ACSY 57 2I K29 5305 03 KNOB ACSY TK 790 TK 790 B A 2B N09 2292 05 HEXAGON HEAD SCREW B 2A ...

Page 40: ...IP C 18PF J K2 C101 CK73GB1H103K CHIP C 0 010UF K C102 103 CC73GCH1H220J CHIP C 22PF J C104 CC73GCH1H180J CHIP C 18PF J C105 CC73GCH1H101J CHIP C 100PF J C106 CK73GB1H103K CHIP C 0 010UF K C107 CC73GCH1H101J CHIP C 100PF J C108 CC73GCH1H100D CHIP C 10PF D C110 CC73GCH1H100D CHIP C 10PF D K C110 CC73GCH1H150J CHIP C 15PF J K2 C111 CC73GCH1H020C CHIP C 2 0PF C C112 CK73GB1H103K CHIP C 0 010UF K C113...

Page 41: ...IP C 1000PF K C325 CC73GCH1H360J CHIP C 36PF J K C325 CC73GCH1H390J CHIP C 39PF J K2 C326 CC73GCH1H050C CHIP C 5 0PF C K C326 CC73GCH1H070D CHIP C 7 0PF D K2 C327 CC73GCH1H470J CHIP C 47PF J C328 CC73GCH1H180G CHIP C 18PF G K C328 CC73GCH1H270J CHIP C 27PF J K2 C329 CK73GB1H102K CHIP C 1000PF K C330 CC73GCH1HR75C CHIP C 0 75PF C C331 CC73GCH1H150J CHIP C 15PF J K C331 CC73GCH1H180J CHIP C 18PF J K...

Page 42: ... 05 ELECTRO 330UF 25WV C620 CK73GB1E103K CHIP C 0 010UF K C621 CK73FB1E104K CHIP C 0 10UF K C622 CK73GB1H102K CHIP C 1000PF K C623 C92 0040 05 CHIP ELE 47UF 16WV C624 CK73GB1H102K CHIP C 1000PF K C625 CK73GB1E103K CHIP C 0 010UF K C626 C92 0004 05 CHIP TAN 1 0UF 16WV C627 628 CK73FB1E104K CHIP C 0 10UF K C629 630 CK73GB1H102K CHIP C 1000PF K C631 CC73GCH1H101J CHIP C 100PF J C632 639 CK73GB1H102K ...

Page 43: ...GB1J472J CHIP R 4 7K J 1 16W R9 RK73GB1J103J CHIP R 10K J 1 16W R10 RK73GB1J331J CHIP R 330 J 1 16W K2 R10 RK73GB1J471J CHIP R 470 J 1 16W K R11 RK73GB1J102J CHIP R 1 0K J 1 16W R12 RK73FB2A101J CHIP R 100 J 1 10W R13 RK73GB1J223J CHIP R 22K J 1 16W R14 RK73GB1J102J CHIP R 1 0K J 1 16W R15 RK73FB2A470J CHIP R 47 J 1 10W R101 RK73GB1J470J CHIP R 47 J 1 16W R102 RK73GB1J472J CHIP R 4 7K J 1 16W R103...

Page 44: ...31J CHIP R 330 J 1 16W R349 RK73GB1J330J CHIP R 33 J 1 16W R350 RK73GB1J101J CHIP R 100 J 1 16W R351 352 RK73GB1J102J CHIP R 1 0K J 1 16W R354 355 RK73GB1J220J CHIP R 22 J 1 16W R357 R92 1252 05 CHIP R 0 OHM R358 RK73GB1J331J CHIP R 330 J 1 16W R361 RK73GB1J102J CHIP R 1 0K J 1 16W R366 R92 1252 05 CHIP R 0 OHM R501 RK73GB1J333J CHIP R 33K J 1 16W R502 RK73GB1J471J CHIP R 470 J 1 16W R504 R92 0670...

Page 45: ...R652 RK73FB2A102J CHIP R 1 0K J 1 10W R654 656 RK73FB2A102J CHIP R 1 0K J 1 10W R657 R92 0670 05 CHIP R 0 OHM R658 RK73GB1J473J CHIP R 47K J 1 16W R659 RK73GB1J563J CHIP R 56K J 1 16W R661 R92 0670 05 CHIP R 0 OHM R662 RK73GB1J472J CHIP R 4 7K J 1 16W R663 RK73GB1J473J CHIP R 47K J 1 16W R664 RK73GB1J333J CHIP R 33K J 1 16W R665 RK73GB1J104J CHIP R 100K J 1 16W R666 667 R92 0670 05 CHIP R 0 OHM R6...

Page 46: ...MW1 TRANSISTOR Q6 2SC2712 Y TRANSISTOR Q101 102 2SC3357 TRANSISTOR Q104 2SC3357 TRANSISTOR Q105 DTA144EUA DIGITAL TRANSISTOR Q106 DTC144EUA DIGITAL TRANSISTOR Q107 2SC4215 Y TRANSISTOR Q108 DTC144EUA DIGITAL TRANSISTOR Q109 2SC4617 S TRANSISTOR Q201 2SC3357 TRANSISTOR Q202 2SB1132 Q R TRANSISTOR Q203 DTC114EUA DIGITAL TRANSISTOR Q204 2SC2954 TRANSISTOR Q205 DTC114EUA DIGITAL TRANSISTOR Q206 2SB113...

Page 47: ...UF 50WV C15 CK73FB1H102K CHIP C 1000PF K C16 CM73F2H430J CHIP C 43PF J C17 CK73FB1H102K CHIP C 1000PF K C18 C92 0726 05 ELECTRO 47UF 25WV C19 CM73F2H161J CHIP C 160PF J C20 CK73FB1H102K CHIP C 1000PF K C21 CM73F2H201J CHIP C 200PF J C22 23 CM73F2H681J CHIP C 680PF J C24 25 CM73F2H201J CHIP C 200PF J C26 27 CK73FB1H102K CHIP C 1000PF K C28 31 CM73F2H271J CHIP C 270PF J C32 35 CM73F2H221J CHIP C 220...

Page 48: ...IP C 0 010UF K C126 CC73GCH1H150J CHIP C 15PF J C127 CC73GCH1H151J CHIP C 150PF J C128 CC73GCH1H030C CHIP C 3 0PF C C129 CC73GCH1H101J CHIP C 100PF J C130 CC73GCH1H270J CHIP C 27PF J C131 CK73GB1H102K CHIP C 1000PF K C132 CC73GCH1H030C CHIP C 3 0PF C C133 CC73GCH1H270J CHIP C 27PF J C134 135 CK73GB1H103K CHIP C 0 010UF K C138 140 CC73GCH1H030C CHIP C 3 0PF C C141 CC73GCH1H040C CHIP C 4 0PF C C143 ...

Page 49: ...C CHIP C 3 0PF C C365 366 CC73GCH1H150J CHIP C 15PF J C370 CK73GB1H102K CHIP C 1000PF K C371 CK73FB1H473K CHIP C 0 047UF K C501 CC73GCH1H101J CHIP C 100PF J C524 CK73GB1H102K CHIP C 1000PF K C525 CK73FB1E683K CHIP C 0 068UF K C526 527 CK73GB1H471K CHIP C 470PF K C528 CC73GCH1H101J CHIP C 100PF J C529 C92 0585 05 CHIP TAN 4 7UF 16WV C530 CK73GB1E123K CHIP C 0 012UF K C531 C92 0560 05 CHIP TAN 10UF ...

Page 50: ...123K CHIP C 0 012UF K C711 CC73GCH1H101J CHIP C 100PF J C712 CK73GB1E473J CHIP C 0 047UF J TC301 302 C05 0393 05 CERAMIC TRIMMER CAP 8PF CN101 E04 0154 05 PIN SOCKET CN102 103 E40 5538 05 PIN ASSY CN104 E04 0154 05 PIN SOCKET CN201 E40 5752 05 PIN ASSY CN202 E40 5978 05 FLAT CABLE CONNECTOR CN203 E04 0154 05 PIN SOCKET CN501 E40 5703 05 PIN ASSY CN504 E40 5661 05 PIN ASSY SOCKET CN505 E40 5960 05 ...

Page 51: ... R 1 0K J 1 16W R204 RK73GB1J271J CHIP R 270 J 1 16W R205 RK73GB1J222J CHIP R 2 2K J 1 16W R206 RK73GB1J103J CHIP R 10K J 1 16W R207 RK73GB1J100J CHIP R 10 J 1 16W R208 RK73GB1J222J CHIP R 2 2K J 1 16W R209 RK73GB1J560J CHIP R 56 J 1 16W R210 RK73GB1J470J CHIP R 47 J 1 16W R211 RK73GB1J152J CHIP R 1 5K J 1 16W R212 RK73GB1J472J CHIP R 4 7K J 1 16W R213 RK73GB1J473J CHIP R 47K J 1 16W R214 RK73GB1J...

Page 52: ...4J CHIP R 100K J 1 16W R577 RK73GB1J122J CHIP R 1 2K J 1 16W R578 RK73GB1J102J CHIP R 1 0K J 1 16W R579 580 RK73GB1J823J CHIP R 82K J 1 16W R581 582 RK73GB1J683J CHIP R 68K J 1 16W R583 R92 0670 05 CHIP R 0 OHM R584 RK73GB1J333J CHIP R 33K J 1 16W R586 RK73GB1J104J CHIP R 100K J 1 16W R587 R92 0670 05 CHIP R 0 OHM R588 RK73GB1J473J CHIP R 47K J 1 16W R589 RK73GB1J223J CHIP R 22K J 1 16W R591 592 R...

Page 53: ...PACITANCE DIODE D306 DAN235K DIODE D501 02CZ18 X Y ZENER DIODE D502 503 1SS355 DIODE D504 02CZ5 6 X Y ZENER DIODE D505 1SS355 DIODE D506 1SS301 DIODE D507 02CZ15 X Y ZENER DIODE D508 1SS355 DIODE D511 1SS301 DIODE D512 1SS355 DIODE D513 517 DA204U DIODE D519 DA204U DIODE D521 DA204U DIODE D523 524 DA204U DIODE D526 527 DA204U DIODE D528 529 1SS355 DIODE IC101 TA31136FN IC FM IC IC201 BU4094BCF IC ...

Page 54: ...N87 3006 46 BRAZIER HEAD TAPTITE SCREW 225 1N N99 0364 05 SCREW SET ACSY 227 2F T07 0265 05 SPEAKER B11 1148 14 ILLUMINATION GUIDE B11 1149 04 FILTER D6 11 B30 2140 05 LED YEL D12 B30 2194 05 LED GREEN D13 B30 2193 05 LED RED ED1 B38 0800 05 LCD C11 CC73GCH1H101J CHIP C 100PF J C17 CC73GCH1H101J CHIP C 100PF J C20 CK73GB1H102K CHIP C 1000PF K C22 CK73GB1E103K CHIP C 0 010UF K C23 24 CC73GCH1H101J ...

Page 55: ...CC73GCH1H101J CHIP C 100PF J C14 CC73GCH1H101J CHIP C 100PF J C20 CK73GB1H102K CHIP C 1000PF K C22 CK73GB1E103K CHIP C 0 010UF K C23 24 CC73GCH1H101J CHIP C 100PF J C25 CK73GB1E103K CHIP C 0 010UF K C27 CK73GB1E223K CHIP C 0 022UF K C28 29 CK73GB1E103K CHIP C 0 010UF K C30 CC73GCH1H101J CHIP C 100PF J C32 CC73GCH1H101J CHIP C 100PF J C35 36 CK73GB1E103K CHIP C 0 010UF K C40 CK73GB1E103K CHIP C 0 0...

Page 56: ...DE D18 1SS301 DIODE D19 MA2S111 DIODE IC1 NJM78L05UA IC AVR IC2 RH5VL42C IC RESET IC3 AT24C64N10SI27 IC EEPROM IC4 78064GCA458EU IC CPU Q1 2SC2873 Y TRANSISTOR Q2 8 DTC144EU DIGITAL TRANSISTOR Q9 10 DTC114TU DIGITAL TRANSISTOR Q14 15 DTD114EK DIGITAL TRANSISTOR S4 W02 0393 05 ENCODER Ref No Address Parts No Description Ref No Address Parts No Description New Desti parts nation New Desti parts nati...

Page 57: ... 6 1 4 13 13 26 Cx2 Cx2 D Gx2 Gx2 Gx2 Gx2 Ex2 Lx2 Lx2 Lx2 Ax2 Bx2 Bx2 D Gx5 G G Cx2 Cx2 C G Gx2 Gx2 Jx2 Jx2 Jx2 J 700 TX RX A 3 Control B 3 Final C 3 KCH 10 KCH 11 A N09 2292 05 B M3 x 6 F N32 3006 46 C M3 x 6 OC BLK N33 3006 45 D M3 x 6 Bi N35 3006 46 E M3 x 8 N67 3008 46 G M2 6 x 6 Br Tap N87 2606 46 J M2 6 x 12 Br Tap N87 2612 46 L M3 x 8 Br Tap N87 3008 46 ...

Page 58: ... 128 127 106 132 106 101 113 113 Nx2 Nx2 Nx2 Q Q Rx6 Ox2 Rx4 Rx3 Px5 Tx2 Tx2 Tx2 Mx2 P P P Rx5 R R Nx3 Nx3 R Rx2 Rx2 Sx2 Sx2 Sx2 S 701 TX RX A 3 Control B 3 Final KCH 10 KCH 11 M N09 2292 05 N M3 x 6 OC BLK N33 3006 45 O M3 x 6 Bi N35 3006 46 P M3 x 8 N67 3008 46 Q M4 X 8 N68 4006 46 R M2 6 x 6 Br Tap N87 2606 46 S M2 6 x 12 Br Tap N87 2612 46 T M3 x 8 Br Tap N87 3008 46 ...

Page 59: ...ers larger than 700 are not supplied EXPLODED VIEW KCH 10 E F 1 2 3 203 206 216 217 227 220 201 205 218x2 Vx4 702 X54 B 3 X54 C 3 U W 703 Vx2 X54 A 3 207 U M2 6 x 5 Br Tap N87 2605 46 V M2 6 x 8 Br Tap N87 2608 46 W M3 x 6 Br Tap N87 3006 46 Wx2 ...

Page 60: ...ploded numbers larger than 700 are not supplied EXPLODED VIEW KCH 11 G H 1 2 3 313 312 317 303 301 315x2 X54 B 2 Yx3 Yx2 X54 A 2 X Zx2 Zx2 704 304 X M2 6 x 5 Br Tap N87 2605 46 Y M2 6 x 8 Br Tap N87 2608 46 Z M3 x 8 Br Tap N87 3008 46 ...

Page 61: ...0 B UPC code label 38 Packing fixture H12 1403 04 12 DC cord assy E30 3318 15 TK 790 62 Microphone T91 0587 25 TK 790 1 2 3 40 Protection bag H25 0029 04 TK 790 21 Fuse Blade F05 1537 05 x 3 TK 790 59 Screw set N99 0321 05 TK 790 N99 0365 05 TK 790 B 41 Protection bag H25 2063 04 16 Short plug SP E37 0733 05 22 Insulating cover F29 0472 04 50 Band J61 0307 05 46 Holder MIC J19 1584 05 TK 790 42 Pr...

Page 62: ...e H12 1410 04 139 Polystyrene foamed board H11 0892 04 142 Carton board H13 1066 04 UPC code label 146 Item carton case H52 1229 12 136 Polystyrene foamed fixture H10 6617 11 141 Packing fixture H12 1422 04 138 Polystyrene foamed board H11 0853 04 144 Protection bag H25 0103 04 159 Screw set N99 0365 05 143 Protection bag H25 2063 04 116 Short plug SP E37 0733 05 122 Insulating cover F29 0472 04 1...

Page 63: ...059 04 225 Screw set N99 0364 05 213 Protection bag H25 0117 04 221 Knob K29 5276 03 222 Knob K29 5277 03 223 Knob K29 5305 03 211 Protection bag H25 0029 04 219 Knob K29 4704 04 x 5 208 Polystyrene foamed fixture H10 6622 02 209 Polystyrene foamed board H11 0894 04 212 Protection bag H25 0103 04 214 Item carton case H52 1271 02 ...

Page 64: ...059 04 322 Screw set N99 0364 05 310 Protection bag H25 0117 04 318 Knob K29 5276 03 319 Knob K29 5277 03 320 Knob K29 5305 03 308 Protection bag H25 0029 04 316 Knob K29 4704 04 x 5 305 Polystyrene foamed fixture H10 6622 02 306 Polystyrene foamed board H11 0894 04 309 Protection bag H25 0103 04 311 Item carton case H52 1271 02 ...

Page 65: ... function panel Narrow Test frequency CH Test signalling CH Note When a key other than GRP down is pressed the optional signalling is reset Test frequency channel MHz K TK 790 B 790H B K2 TK 790 B CH TX RX TX RX 1 161 000 161 100 146 000 146 100 2 148 000 148 100 136 000 136 100 3 174 000 173 900 156 000 155 900 4 161 000 161 000 146 000 146 000 5 161 200 161 200 146 200 146 200 6 161 400 161 400 ...

Page 66: ...XXX_ Wide Narrow item Sensitivity SENS_XXX RX_SENSE_ _XXX_ Wide Narrow item Sensitivity SENS_XXX RX_SENSE_ _XXX_ Three digits on the upper left side _ _ L Low Transmission and reception at the low edge Sencitivity SENS_XXX RX_SENSE_ _XXX_ Three digits on the upper left side _ _ C Center Transmission and reception at the center Sensitivity SENS_XXX RX_SENSE_ _XXX_ Three digits on the upper left sid...

Page 67: ...er 30A 8 AF Volt Meter Frequency Range 50Hz to 10kHz AF VTVM Voltage Range 3mV to 3V 9 Audio Generator AG Frequency Range 50Hz to 5kHz or more Output 0 to 1V 10 Distortion Meter Capability 3 or less at 1kHz Input Level 50mV to 10Vrms 11 Voltmeter Measuring Range 10 to 1 5V DC or less Input Impedance 50kΩ V or greater 12 4Ω Dummy Load Approx 4Ω 30W 13 Regulated Power Supply Adjustable from 9 to 17V...

Page 68: ...101 CN102 FIANL UNIT X45 356 TX RX UNIT X57 561 A 3 ANT CN1 W1 W2 CN3 VR1 CN4 Power module FINAL UNIT X57 561 C 3 CN104 L112 L111 L110 CN201 CN103 CN202 A C CV L117 L118 L119 L120 L123 L127 L122 CN203 CN101 CN102 TX RX UNIT X57 561 A 3 CN505 CN501 CN506 CN502 CN504 W501 VR501 MIC SENS CN508 CN507 CONTROL UNIT X57 561 B 3 CN505 CN501 CN506 CN502 CN504 W501 VR501 MIC SENS CN508 CN507 CONTROL UNIT X5...

Page 69: ... K C TC302 CH SIG 7 1 K2 PTT ON 3 CH SIG 2 1 Check 8 0V or less 4 CH SIG 2 1 PTT ON 4 Transmit 1 CH SIG 1 1 Power meter Rear ANT Panel PF3 key CH 1 frequency 70Hz frequency Select FREQ_XXX f counter PF4 key in tune mode PTT ON 4Ω dummy load AF VTVM Oscilloscope Distortion meter SSG ACC SP ANT AG AF VTVM MIC PTT Power meter Coupler Deviation meter Frequency counter ANT Ammeter Power supply DC IN K ...

Page 70: ...t 53dBm 501µV Distortion EXT SP If the distortion value AF output 2V 4Ω meter exceeds 3 you must AF VTVM adjust L127 to obtain a Oscilloscope minimum distortion value 4Ω dummy load 8 RF power 1 CH SIG 1 1 Power meter Rear ANT Final VR1 Maximum clockwise 115W or more High power Select _POW_XXX Ammeter model in tune mode 110W adj 110W 5W 25A or less High power PTT ON Panel PF3 key Check 110W 5W PF4 ...

Page 71: ... Power meter Rear ANT Panel PF3 key Wide 4 1kHz 0 1kHz deviation MXDV_XXX Deviation PF4 key Wide in tune mode meter PTT ON AF VTVM Panel MIC Deviation meter filter AG HPF OFF Oscilloscope LPF 15kHz De emphasis OFF AG 1kHz 50mV 2 Select _ _C MXDV_XXX in tune mode PTT ON 3 Select _ _H MXDV_XXX in tune mode PTT ON Narrow 1 Up down knob Set the narrow Narrow 2 05kHz 0 05kHz n_L MXDV_XXX in tune mode P...

Page 72: ... CH SIG 1 4 Wide 0 75kHz 0 05kHz deviation Select QTDV_XXX in tune mode PTT ON Deviation meter filter HPF OFF LPF 3kHz De emphasis OFF 2 Up down knob Set the narrow Narrow 0 35kHz 0 025kHz n_ _ QTDV_XXX in tune mode PTT ON 13 DQT 1 CH SIG 1 6 Wide 0 75kHz 0 05kHz deviation Select DQDV_XXX in tune mode PTT ON Deviation meter filter HPF OFF LPF 3kHz De emphasis OFF 2 Up down knob Set the narrow Narr...

Page 73: ...loscope 4Ω dummy 2 CH SIG 1 1 load Wide center check Select _ _C SENS_XXX in tune mode 3 CH SIG 3 1 Wide high check Select _ _H SENS_XXX in tune mode 4 CH SIG 1 1 Narrow center check Up down knob Set the narrow n_C SENS_XXX in tune mode 17 Squelch 1 CH SIG 1 1 Adjust to point of Set the value to 255 tight point Select SQ_T_XXX opening squelch Adjust the SSG output to in tune mode Condition SSG out...

Page 74: ...isplay 3 SB O Power output after power switch unit 13 6V or 13 4V 15 4 IGN I Ignition input 5 PS I Power swith control signal input 6 TRD I O TX data output RX data input 7 1 2 O Remote head 1 signal output 8 RST O RESET signal output 9 E Earth 10 MIC I MIC signal input 11 ME MIC earth CN501 1 B I Power supply input 13 6V or 13 4V 15 To 2 B I Power supply input 13 6V or 13 4V 15 Final 3 E Earth un...

Page 75: ...t 12 PTO O PTT signal output 13 8C O Common 8V output 14 E Earth CN1 1 DO I Transmission drive input To Coaxial connector TX RX unit CN2 1 B I Power supply input 13 6V 15 FINAL UNIT X57 5610 XX C 3 TK 790 B Connector Terminal Terminal I O Terminal Function No No Name CN3 1 RA O Receiver signal output To Coaxial connector TX RX unit W1 1 E Earth To 2 B O Power supply output 13 6V 15 Control 3 B O P...

Page 76: ...g DC coupling Output level 100mVrms Standard modulation Acc 25 pin D sub connector Connector Terminal Terminal I O Terminal Function No No Name Output frequency response Wide 300 4 8kHz 1 2dB 4 8 9 6kHz 1 24dB Narrow 300 4 8kHz 1 10dB 1kHz 0dB 20 AO1 O Auxiliary output 1 FPU selectable 21 AO3 O Auxiliary output 3 FPU selectable 22 AO4 O Auxiliary output 4 FPU selectable 23 SQ O Squelch signal outp...

Page 77: ...TK 790 B H B TK 790 B H B 77 WIRING ...

Page 78: ...3 SB NC NC PTT BLC DM NC TRD E MIC ME HK J1 MIC 26 25 1 100 76 75 51 50 ED1 8 1 C17 C27 C30 C32 C35 CN4 IC2 G O I IC3 1 4 5 8 R1 R16 R18 R2 R21 R23 R24 R26 R29 R30 R31 R32 R33 R34 R35 R36 R39 R40 R48 C37 CN2 X1 C28 C29 Q3 Q5 Q6 Q7 Q12 Q13 R54 CN6 8 1 D1 D16 D17 D19 D2 D20 D21 D24 CN3 CN1 R55 Q14 Q15 R12 R11 R9 R7 D25 R67 1 9 IGN SB E MIC ME AI1 AI2 AO1 AO2 1 11 RS2 RS1 SB IGN PS TRD 1 2 RST E MIC ...

Page 79: ... R53 R51 R49 R47 R45 R46 R48 R50 R52 R54 R56 IC4 IC3 C67 C66 R26 C35 C27 IC2 O I G C36 C32 C40 CN4 R42 R20 R19 R14 R16 R34 R33 R31 R21 R22 R11 R2 R1 R24 R28 R29 R39 CN2 C30 C14 X1 C28 C29 R63 Q3 Q6 R13 Q10 Q9 R65 D1 D11 D12 D14 D15 D16 D18 D2 CN1 CN3 CN5 R66 Q14 Q15 D19 R67 1 9 IGN SB E MIC ME AI1 AI2 AO1 AO2 11 1 RS2 RS1 SB OGN PS TRD 1 2 RST E MIC ME RS1 RS2 1 2 3 1 1 E VCC CE CL DI DO NC LEDA L...

Page 80: ...T R P N L J H F D B S Q O M K I G E C A 1 3 5 7 2 4 6 CIRCUIT DIAGRAM TK 790 B H B Note Components marked with a dot are parts of pattern 1 86 ...

Page 81: ...A C E G I K M O Q S B D F H J L N P R T 1 3 5 7 2 4 6 TK 790 B H B CIRCUIT DIAGRAM 87 Note Components marked with a dot are parts of pattern 1 ...

Page 82: ...516 Q517 Q522 CN504 C619 CN507 R717 C598 R713 R714 R716 R676 R718 C703 R690 R720 C704 C705 C706 C707 R721 R722 C708 R723 Q526 Q527 Q530 IC526 R724 R725 C709 R726 C710 C711 R727 Q531 Q532 R728 IC518 1 4 5 8 1 4 5 8 1 4 5 8 IC521 IC524 IC502 1 4 5 8 Q541 R742 X502 R746 R748 R747 TI PC TV RSI SQL DET E 8C KEY CK ES DT SB MB MO CP EP UL NC 1 18 DE3 5C TP 1 11 12 22 23 33 34 44 SB 1 10 AFO DE3 E EI CK ...

Page 83: ...07 D501 R698 C698 R699 C699 R706 R702 C701 R703 Q525 R707 R708 R709 R710 R711 R712 IC523 1 8 9 16 IC517 1 8 9 16 R715 Q528 Q529 C712 R655 Q538 Q540 Q537 Q539 Q534 Q536 Q533 Q535 R734 R730 R736 R732 R733 R729 R731 R735 IC513 IC505 IC508 1 1 1 1 4 4 4 5 5 5 4 5 8 8 8 8 IC510 R741 R744 Q542 Q544 Q543 R740 J72 0567 42 B 3 1 4 5 8 1 16 17 32 1 2 4 5 3 93 94 CONTROL UNIT X57 5610 XX B 3 10 TK 790 B K 11...

Page 84: ... R631 R632 R633 R634 R635 R636 R638 R639 R641 R657 R661 R662 R663 R667 VR501 MIC SENS X501 R695 R697 IC504 W501 CN506 CN505 R668 R674 R602 CN501 CN502 Q519 IC525 1 7 8 14 IC514 R536 R617 R618 R620 R619 R623 R629 R630 R627 L501 R607 R659 C640 R658 R691 R537 R509 3 1 C527 IC522 R700 C700 C524 Q503 Q514 Q520 Q516 Q517 Q522 CN504 C619 CN507 R717 C598 R713 R714 R716 R676 R718 C703 R690 R720 C704 C705 C...

Page 85: ... 3 R7 R9 R8 C21 C24 C27 C28 R10 C31 C12 C20 C1 C8 R6 R11 R14 R13 C38 C34 C39 C15 C14 Q4 R5 C37 Q5 1 3 4 5 D6 D5 Q1 Q3 Q6 TK 790 B PC BOARD VIEWS FINAL UNIT X57 5610 XX C 3 10 TK 790 B K 11 TK 790 B K2 Component side view FINAL UNIT X57 5610 XX C 3 10 TK 790 B K 11 TK 790 B K2 Foil side view 97 98 Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Ref No Address Q1 9I Q3 9I Q4 9I Q5 9...

Page 86: ... view Foil side Component side Foil side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Connect 1 and 4 Ref No Address Ref No Address Ref No Address IC1 3H Q5 6Q D4 6N Q1 6I Q6 6Q D5 4O Q2 6I D1 5B D6 3P Q3 6J D2 6B Q4 6J D3 5M 2SD2399 DTA144EUA DTC114TU DTC114YUA DTC144EU DTC363EK DTD114EK 2SA1162 2SC2712 2SB1132 2SC2873 2SC2954 2SC3357 2SD1624 FMC2 FMW1 DTA114EUA DTA114TUA DTA144TKA PCD3312CT L78LR05B ...

Page 87: ... R158 R159 R160 R143 C117 C123 C195 C178 Q102 B C E R163 R161 R120 R123 C337 R312 R313 R324 C356 C203 R302 R303 R304 R301 R119 C125 R162 C124 R166 C133 C130 C126 C363 C364 C310 C361 C332 L312 R121 R122 R124 CN202 C217 R164 C193 R108 R109 Q109 R112 C189 C191 C190 R114 18 PC TV RSSI SQL DET E 8C KEY CK ES DT SB MB MO CP EP UL NC 1 D103 C321 C319 C318 C312 L128 C147 L129 L130 2 1 Q307 Q308 Q310 Q311 ...

Page 88: ...57 R355 C358 C357 C302 C301 C348 R206 R209 R211 R208 R352 C129 C131 R216 R218 R219 R220 R221 C219 R337 R327 R325 C320 R214 C216 R305 C342 C366 C362 L314 C215 C224 C127 C330 D305 C370 R361 L313 C365 R318 R129 C309 R306 C305 C166 L134 L132 L133 C187 C188 C184 C186 C185 R115 D101 C151 D105 R128 Q105 Q106 Q107 Q108 Q203 Q205 Q301 Q302 Q303 Q304 Q309 D106 D107 L136 IC201 1 8 9 16 R366 1 8 9 16 J72 0567...

Page 89: ...C343 C345 C344 L310 R358 R346 R347 R344 R345 R348 C360 C349 C347 C359 C346 C350 C351 R349 R342 R343 R350 R351 L311 Q201 B C E Q204 Q104 B C E B C E R203 8T 8R 8R 8R 9CL 9CL 9CL 9CL 8T DB 8C 8C R202 R201 C201 R204 R205 R207 C204 C202 C205 C208 C211 L201 L202 R134 R135 R132 C148 C144 L121 R133 C143 A101 1 3 4 6 C183 C132 C128 L131 L115 L114 R210 C213 R158 R159 R160 R143 C117 C123 C195 C178 Q102 B C ...

Page 90: ...T R P N L J H F D B S Q O M K I G E C A 1 3 5 7 2 4 6 CIRCUIT DIAGRAM TK 790 B 110 Note Components marked with a dot are parts of pattern 1 ...

Page 91: ...111 A C E G I K M O Q S B D F H J L N P R T 1 3 5 7 2 4 6 TK 790H B CIRCUIT DIAGRAM Note Components marked with a dot are parts of pattern 1 ...

Page 92: ...9 DB E 8R 8T PC Q9 C69 C55 C61 C57 D3 C81 C9 C63 Q8 R19 D6 R18 C7 C11 C8 C3 R22 R20 R21 R1 CN1 DO CN2 RA E C B E C B Q3 C18 C15 C13 4 3 2 1 C74 W4 E B B 1 3 C65 C67 C52 C19 C47 C16 L1 C23 C21 C22 L2 C25 D4 C73 D7 CN3 B W2 W1 CN4 GND C24 R9 R8 Q6 Q7 R10 C28 C29 C33 C32 C30 C31 C35 C34 W2 C48 C45 C50 C42 L3 R13 C40 C41 C43 C46 L4 C38 C39 C37 W1 C44 TH1 L6 J72 0568 02 1 2 3 5 116 PC BOARD VIEW TK 790...

Page 93: ...TK 790 B H B TK 790 B H B BLOCK DIAGRAM 117 ...

Page 94: ...adjustable to 5W TK 790H 110W adjustable to 45W Antenna Impedance 50Ω Spurious Response 80dB Type of Emission 16K0F3E Wide 11K0F3E Narrow FM Hum and Noise 53dB Wide 47dB Narrow Microphone Impedance 600Ω Audio Distortion Less than 2 at 1000Hz Band Spread TK 790 26MHz K 20MHz K2 TK 790H 26MHz K KENWOOD follows a policy of continous advancement in development For this reason specifications may be cha...

Page 95: ...y 75018 Paris France KENWOOD ELECTRONICS U K LIMITED KENWOOD House Dwight Road Watford Herts WD1 8EB United Kingdom KENWOOD ELECTRONICS EUROPE B V Amsterdamseweg 37 1422 AC Uithoorn The Netherlands KENWOOD ELECTRONICS ITALIA S p A Via G Sirtori 7 9 20129 Milano Italy KENWOOD IBERICA S A Bolivia 239 08020 Barcelona Spain KENWOOD ELECTRONICS AUSTRALIA PTY LTD A C N 001 499 074 16 Giffnock Avenue Cen...

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