Seg DVC 58X Service Manual

430MHz FM TRANSCEIVERTH-K4AT/K4E© 2003-9 PRINTED IN JAPANB51-8660-00 (S) 497SERVICE MANUALDISASSEMBLY FOR REPAIR ...2C

TH-K4AT/K4E10Power Supply Circuit Charging CircuitWhen an external power supply is connected to the DC INterminal, the constant-current circuit consi

TH-K4AT/K4E11 Voltage Detection CircuitVarious voltages are input to the A/D port of the MPU (IC8)for processing.Battery voltage is divided with resi

TH-K4AT/K4E12 Key and Encoder Input CircuitThe POWER key is assigned to the interrupt port (pin 95) ofthe MPU.The PTT key is assigned to the dedicate

TH-K4AT/K4E13 CTCSS/DCSThe encode signal is generated by the MPU (IC8) and outputfrom the TONE terminal (pin 41) of the MPU.The unwanted high-frequen

TH-K4AT/K4E14MPU : 90522BPFFG139 (IC8) Pin function1 CLOCK O Common serial clock output2 DATA O Common serial data output3 EEPDI I Data input from EE

TH-K4AT/K4E1598 DCDET IDC IN detection interrupt input (↓)L:DC IN connected99 RXLED O Busy LED output H:ON100 BSFT O Beat shift swiching output H:ON10

TH-K4AT/K4E16D34AVRconstant-voltageD35Reverse currentBatterypreventionD36Reverse currentDC INpreventionD40 TX LED Lights on TXD41 BUSY LED Lights on R

TH-K4AT/K4E17∗ New Parts. indicates safety critical components.Parts without Parts No. are not supplied.Les articles non mentionnes dans le Part

TH-K4AT/K4EPARTS LIST18TX-RX UNIT (X57-675X-XX)DestinationRef. No.Parts No. DescriptionAddressNewpartsDestinationRef. No.Parts No. DescriptionAddressN

TH-K4AT/K4EPARTS LIST19TX-RX UNIT (X57-675X-XX)DestinationRef. No.Parts No. DescriptionAddressNewpartsDestinationRef. No.Parts No. DescriptionAddressN

TH-K4AT/K4E2DISASSEMBLY FOR REPAIRHow to remove the case assembly from thechassis1. Remove two screws (z) holding the chassis.2. Pull out two knobs (x

TH-K4AT/K4EPARTS LIST20TX-RX UNIT (X57-675X-XX)DestinationRef. No.Parts No. DescriptionAddressNewpartsDestinationRef. No.Parts No. DescriptionAddressN

TH-K4AT/K4EPARTS LIST21TX-RX UNIT (X57-675X-XX)DestinationRef. No.Parts No. DescriptionAddressNewpartsDestinationRef. No.Parts No. DescriptionAddressN

TH-K4AT/K4EPARTS LIST22TX-RX UNIT (X57-675X-XX)DestinationRef. No.Parts No. DescriptionAddressNewpartsDestinationRef. No.Parts No. DescriptionAddressN

TH-K4AT/K4E23EXPLODED VIEW (TH-K4AT)Parts with the exploded numbers larger than 700 are not supplied.AB12327CB343564016DDD291089152018173637DTX-RX Uni

TH-K4AT/K4E24Parts with the exploded numbers larger than 700 are not supplied.EXPLODED VIEW (TH-K4E)CD12337CB343564016DDD291089152018193837DTX-RX Unit

TH-K4AT/K4E25EF123703. PAMPHLET11.INSTRUCTION MANUAL(B62-1696-00)(B62-1697-00)(B62-1699-00)(B62-1702-00)(B62-1757-00)(B62-1758-00)41.HELICAL ANTENNA(T

TH-K4AT/K4E26PACKING (TH-K4AT)Parts with the exploded numbers larger than 700 are not supplied.GH12311.INSTRUCTION MANUAL(B62-1695-00)(B62-1696-00)703

TH-K4AT/K4E27ADJUSTMENTSingle Tone ModeThis mode is used to check the DTMF deviation.Operation 16key (M2 type)1. Press the [PTT] key on the transceiv

TH-K4AT/K4E286. To exit the Adjustment Mode, turn the transceiver OFF.Note:• When you press [LAMP] or [MONI] key, ensure the bossesof rubber keys alig

TH-K4AT/K4E29D. S-meter (Two segments in S-meter light, all segmentsin S-meter light)1S-meter (Two segments in S-meter light)(1)Press the [LAMP] or [M

TH-K4AT/K4E3DISASSEMBLY FOR REPAIRSoldering the antenna terminal1. With the shield cover removed from the antenna terminalsection, install two screws

TH-K4AT/K4E30(8)Press the [MENU] key to write the current APC value intothe EEPROM.27.5V TX H power (Center frequency)(1)Press the [LAMP] or [MONI] ke

TH-K4AT/K4E31(2)Press the [VFO], [MR] or [CALL] key to switch to thefrequency display.(3)Turn the encoder to display the lower limit frequency onthe L

TH-K4AT/K4E32J. 13.8V TX M power (Lower limit frequency, centerfrequency, upper limit frequency)113.8V TX M power (Lower limit frequency)(1)Press the

TH-K4AT/K4E33(2)Press the [VFO], [MR] or [CALL] key to switch to thefrequency display.(3)Turn the encoder to display the upper limit frequency onthe L

TH-K4AT/K4E34ADJUSTMENT(4)Press the [CALL] key to switch to the adjustment display.(5)When the [PTT] key is pressed to enable transmit mode, apreset D

TH-K4AT/K4E35ADJUSTMENT1.Setting andConnect the optional PG-2WLCD total illumination display Initial configuration displayed afterresettingDC cable to

TH-K4AT/K4E361.RX BPF Squelch level: 0 Adjust 1) Frequency: 435.050MHz SSG TX-RX ANT VOL Turn the VOL knob 0.63VSSG output: –53dBm (501 uV)Oscillosc

TH-K4AT/K4E37ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications/Test equipment UnitTerminalUnitParts MethodRemarksSwitch to Adjustment modea

TH-K4AT/K4E38ADJUSTMENTTransmitter sectionItem ConditionMeasurement AdjustmentSpecifications/Test equipment UnitTerminalUnitParts MethodRemarks1.TX po

TH-K4AT/K4E39ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications/Test equipment UnitTerminalUnitParts MethodRemarks2.TX powerWrite (DC INterm

TH-K4AT/K4E4Special care and attention required for assembly1. Gluing to the key top (MIC element section)You must also glue on the speaker storage ar

TH-K4AT/K4E40ANTANTMICLCDVR6VR5CheckBy tuning theVR6, adjustthe modulationwave untilif becomes thesquare wave.4.2kHzAccording to thelarger +, –.Change

TH-K4AT/K4E41Item ConditionMeasurement AdjustmentSpecifications/Test equipment UnitTerminalUnitParts MethodRemarks7.Tonedeviation8.DCSdeviation9.VOXSe

TH-K4AT/K4E42Adjustment pointsTX-RX unit (A/3)Component side viewJ2DC INJ3MICJ4SPVR1VR5VR6LVBLCDANTBTEMPGNDSETTX-RX UNIT (A/3)Component side view10.VO

TH-K4AT/K4E43TERMINAL FUNCTIONCN1 1 GND GND2 Vol-OUT RX audio volume output3 Vol-IN RX audio volume input4 EN2 Encoder 25 GND GND6 EN1 Encoder 1CN2 1

JIHGFEDCBA1234567891011121314C20C21C22R210C24R211C25R212C26R213C27R214R215C291134613KYO2KYO1KYO0LAMPKIN4KYO3KIN1KIN3KIN0KIN2GNDMIG8MIM142R216R218C30C3

JKLMNOPQRS1234567891011121314R217R223R226R227R234R236R237R238C203R172204R242R243R246 R248212Q12R252R263DSSQ31C86R276Q37BECQ38Q41C246C247C248C249Q47134

JIHGFEDCBA1234567891011121314R235R239 C297R240R241C206C20R253R254R256Q171234C223C224C226C227C228C229Q29C230C231C82C83Q30C84C23516ENCAGNDENCBVOL INVOL

JKLMNOPQRS1234567891011121314C201C202C205C206C207C208C209C210C61Q101234C64Q11GSDC65C67C68C219Q161234Q171234C220C221C71C222C72C223C73C224C225C75C226C76

JKLMNOPQRSIHGFEDCBA12345678910111213141234567891011121314C20C21C22R210C24R211C25R212C26R213C27R214R215C291134613KYO2KYO1KYO0LAMPKIN4KYO3KIN1KIN3KIN0KI

JKLMNOPQRSIHGFEDCBA12345678910111213141234567891011121314R235R239 C297C201C202R240C205R241C206C207C208C209C210C61Q101234C64Q11GSDC65R253C67R254C68C219

TH-K4AT/K4E5DISASSEMBLY FOR REPAIR4. Packing (G53-1572-02) TX/BUSY lamp installationprocedure(1)To assure waterproofing, install the packing in the ch

JIHGFEDCBA1234567891011121314*MIC1+–D42D43D44D46D47S7PTTMENU1/F 2/VFO 3/MR F/CALLVFO654789MRCALL#0LAMPMONIJ72-0884-19 (B/3)J72-0884-19 (C/3)48TH-K4AT/

ABCDEFGHI J1234567891011121314J72-0884-19 (B/3)J72-0884-19 (C/3)R230C243+–Q50DG1214 13SD48D49R336R337C374CN71PTTKYO2BL52KIN4KYO1GND6CN8KIN3KIN0KIN2GND

50TH-K4AT/K4ESCHEMATIC DIAGRAMA B C D E1234567X57-675 1/5-t-t-t5MS2SC4919Q29R19410kC2580.1uC290470pC246100u10R14010kIC16NJM2904V1234GND5678V+R155100k

TH-K4AT/K4ESCHEMATIC DIAGRAMF G H I JX57-675 2/5TX-RX UNIT (X57-675X-XX)(A/3)SEG31SEG5R3133.3kR3124.7kCOM3R27547kCP331kR2351kCOM2SEG3SEG26SEG4R3234.7

TH-K4AT/K4ESCHEMATIC DIAGRAMR252100kQ51RN4902C308470pR238 1kC346470pIC10S-80844CNNBB851OUT2VDD4VSS3NCC3101uC302470pCN7123456Q53RN2701C3110.1uD43B30-22

TH-K4AT/K4ESCHEMATIC DIAGRAMR12627kC26470pCP23.9kC17470pD5HSC277L58820nC54470pC24470pC5210pC1670.1u2SC4617(R)Q4C1910.01uC1872pR12747L644.7uR115 5.6k2S

TH-K4AT/K4ESCHEMATIC DIAGRAMYXWVU1234567-t5RD13HVC131R47 5.6kL6527n2SK2596Q11C78 470pC96 1p(B)CN10L172.5nL214TR41 270D73MA2S1112SK3476Q12D12HVC131C824

-t-t-t-t5R5MSR12627k2SC4919Q29R19410kC2580.1uC290470pSEG31C246100u10R14010kR252100kIC16NJM2904V1234GND5678V+R155100kC367470pQ51RN4902SEG5C308470pR3133

TH-K4AT/K4E55BPFQ10Q11Q24Q12Q9BPFQ16Q170.28VrmsIC3ANT-21.00dBmFILTER14.00dBm5.67dBm-36.33dBmANTSPAF(1kHz)FM IC-20.00dBm-53.00dBm7.33dBm8.23mVrms0.83Vr

TH-K4AT/K4E56BLOCK DIAGRAMJ3Q23TCXOLOOP FILTERLPFQ6D1,2,3,4Q1Q3SHIFT SWOSC12.8MHzD74,D79IC5HPFQ30VOX AMPQ29,D22,D27MIC AGCIC16SPLATTER FILTERLIMITT

TH-K4AT/K4E6CIRCUIT DESCRIPTIONFrequency ConfigurationThe frequency configuration is shown in Figure 1 andTable 1.Fig. 1 Frequency configuration361.1

TH-K4AT/K4E57BLOCK DIAGRAMJ4Q24XF1Q16Q2Q5Q4,D7LIPPLE FILTERRF AMP RF AMPD8, D9 Q9Q10Q11 Q12D10,11LPFFINAL AMPANT SWQ58BIAS SWDRIVE AMPPRE-DRIVERF AMPT

TH-K4AT/K4E58BC-21 (WALL CHARGER) / PB-43N (Ni-MH BATTERY PACK)BC-21 External ViewRated output voltage... DC 13.8V ±5%Rated output current ...

TH-K4AT/K4E59BT-14 (BATTERY CASE) / PG-4Y (PROGRAMMING INTERFACE CABLE) /MCP-1A (MEMORY CONTROL PROGRAM)BT-14 (6 AA/LR6)External ViewPG-4YExternal Vie

TH-K4AT/K4ESPECIFICATIONSKENWOOD CORPORATION2967-3, Ishikawa-machi, Hachioji-shi, Tokyo 192-8525, JapanKENWOOD U.S.A. CORPORATIONP.O. BOX 22745, 2201

TH-K4AT/K4E7CIRCUIT DESCRIPTION IF CircuitThe first IF signal (38.85 MHz) amplified by the IF amplifier (Q24)and the second IF signal (38.4 MHz) gene

TH-K4AT/K4E8CIRCUIT DESCRIPTIONTransmitter System Microphone Amplifier CircuitThe audio signal from the microphone passes through ahigh-pass filter (

TH-K4AT/K4E9CIRCUIT DESCRIPTIONThe APC voltage controls the gate voltage of Q11 and Q12,and keeps transmission output stable.The MPU detects power sup