Kenwood TH-D72A Service Manual

144/440 (430) mhz fm dual bander

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Instruction manual (156 pages)

Manual (3 pages)

User manual (92 pages)

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144/440 (430) MHz FM DUAL BANDER

TH-D72A/D72E

SERVICE MANUAL

Whip antenna

(T90-1087-05)

Front glass

(B10-2797-12)

Knob (PTT)

(K29-9457-03)

Button knob

(MONI/LAMP)

(K29-9460-03)

Button knob (Cross)

(K29-9464-03)

Packing (Chassis)

(G53-1843-11)

Plastic cabinet assy

(A02-4092-13)

DISASSEMBLY FOR REPAIR ......................2

CIRCUIT DESCRIPTION ..............................4

SEMICONDUCTOR DATA .........................12

COMPONENTS DESCRIPTION .................16

TERMINAL FUNCTION .............................18

PARTS LIST ...............................................20

EXPLODED VIEW ......................................35

PACKING ....................................................36

TROUBLE SHOOTING ..............................37

ADJUSTMENT ..........................................39

RoHS

This product complies with the

CONTENTS

directive for the European market.

B51-8944-00 ( N ) 277

Knob (Encoder)

(K29-9459-13)

Knob (Volume)

(K29-9458-03)

Cap (SP/MIC)

(B09-0736-03)

PC BOARD

TX-RX UNIT (X57-784X-XX) (A,B/3) ....56

TX-RX UNIT (X57-784X-XX) (C/3) ........60

INTERCONNECTION DIAGRAM ..............64

SCHEMATIC DIAGRAM ............................66

BLOCK DIAGRAM .....................................82

LEVEL DIAGRAM ......................................84

OPTIONAL ACCESSORIES

BT-15 (Battery Case) .............................86

PB-45L (Li-ion Battery Pack) .................86

SPECIFICATIONS ......................................87

This product uses Lead Free solder.

Table of Contents

Summary of Contents for Kenwood TH-D72A

Page 1: Table Of Contents
144/440 (430) MHz FM DUAL BANDER TH-D72A/D72E SERVICE MANUAL © 2010-11 PRINTED IN JA PAN B51-8944-00 ( N ) 277 Knob (Encoder) Whip antenna (K29-9459-13) (T90-1087-05) Knob (Volume) (K29-9458-03) Front glass (B10-2797-12) Knob (PTT) (K29-9457-03) Button knob (MONI/LAMP) Cap (SP/MIC)
Page 2: Disassembly For Repair
Kenwood reserves the right to make changes to any wise, for any purpose without the prior written permission products herein at any time for improvement purposes.
Page 3 TH-D72A/D72E DISASSEMBLY FOR REPAIR 3. How to Remove the GPS Module 4. Precautions for Reassembly 1. The GPS module is connected with FPC and ﬁ xed to the 1. Push the FPC shown in ﬁ gure when assemble PCB and chassis with the double-faced tape.
Page 4: Circuit Description
The VCO of Band A is used for the ﬁ rst-local oscillator for 1. Outline VHF/UHF reception of Band A. The VCO of Band B is used The TH-D72A/D72E is an FM Dual Band (A: 144/440MHz/ for VHF/UHF transmission with modulator by 2-VCOs and E: 144/430MHz) handheld transceiver designed to be used for the ﬁ...
Page 5: Receiver System
TH-D72A/D72E CIRCUIT DESCRIPTION ■ B band VHF receiver circuit 3. Receiver System The reception signal from the antenna passes through a 3-1. VHF receiver circuit ﬁ lter circuit and goes to the RF ampliﬁ er (Q13). The ampli- ■ A band VHF receiver circuit ﬁ...
Page 6 TH-D72A/D72E CIRCUIT DESCRIPTION ■ B band UHF receiver circuit 3-2. UHF receiver circuit ■ A band UHF receiver circuit The reception signal from the antenna passes through a ﬁ lter circuit and goes to the RF ampliﬁ er (Q9). The ampliﬁ ed The reception signal from the antenna passes through a signal then enters the band-pass ﬁ...
Page 7 TH-D72A/D72E CIRCUIT DESCRIPTION 4-2. APC circuit 4. Transmitter System The Automatic transmission Power Control (APC) is a cir- 4-1. Transmitter circuit cuit to obtain a steady TX Power, and controls the TX Power The VHF TX signal of the VCO B output through the RF detecting the drain current of the Drive ampliﬁ...
Page 8 TH-D72A/D72E CIRCUIT DESCRIPTION 5-3. Lock voltage 5-4. Unlock detection circuit The pulse signal obtained by the phase comparison in The terminal LD (pin 14) of each PLL IC (IC431, IC513) each PLL IC (IC431, IC513) is sweep-output with the built-in outputs the “L”...
Page 9 TH-D72A/D72E CIRCUIT DESCRIPTION Q649 Q650 Q656 Q612 D650 45RVA DC-IN JACK 45RVA_S IC644 Q645 Q652 IC645 DC-DC Q613 controller Regulator 45RUA 4.5V Q663 SAVE1 Q658 45RUA_S DC-DC IC715 DC_DET Q614 reset Regulator IC639 3.3V 45RVB DC_S TH703 IC737 Q642 Main...
Page 10 TH-D72A/D72E CIRCUIT DESCRIPTION J701 (2/2) Q718 EXT. Q703 Q711 Q717,Q715 IC721 IC734 AF VOL DET_A emphasis Volume DET_B INT. Q702 IC722 Q709 (B/4,C/4,D/4) WXCTIN_A BEEP IC737 IC727 SAVE2 DTMF WXCTIN_B Main PKD_BND IC732 IC733 Q728 SW IC 1200 R-data IC720...
Page 11 TH-D72A/D72E CIRCUIT DESCRIPTION 8-3. INT-GPS control 8. Control System The GPS unit installed in the equipment communicates 8-1. RESET, BACKUP circuit directly with the Main MCU (IC737) and is controlled. The in- When the supplied +B voltage falls, and the 33M voltage...
Page 12: Semiconductor Data
TH-D72A/D72E SEMICONDUCTOR DATA Main MCU: 5F3651TDFC Pin No. Port Name I/O Function (TX-RX (Control) unit (A/3) IC737) VCC (3.3V) Pin No. Port Name I/O Function RXD1 Not used VREF Reference voltage AVCC VCC (3.3V Analog) Power supply control for TNC...
Page 13 TH-D72A/D72E SEMICONDUCTOR DATA Pin No. Port Name I/O Function Pin No. Port Name I/O Function D[2] Data for LCD Remote voltage input D[1] Data for LCD VOX_IN VOX level detection E2PCS2 Chip select for EEPROM (IC731) SQ level A/D input band A...
Page 14 TH-D72A/D72E SEMICONDUCTOR DATA Pin No. Port Name I/O Function Pin No. Port Name I/O Function AVSS Not used System clock input (15.9744MHz) BT_V Battery voltage detection VCC1 VCC1(3.3V) CHGEND Battery charging current detection 15,16 Not used Thermal detect from charge...
Page 15 TH-D72A/D72E SEMICONDUCTOR DATA Pin No. Port Name I/O Function Pin No. Pin Name Function Pull down Vin1 TX deviation adjustment input Pull down RSTN Reset 71~91 Not used Chip select P102 Pull down SCLK Clock Not used SDATA Data AVSS DVdd Vdd (3.3V Digital)
Page 16: Components Description
TH-D72A/D72E COMPONENTS DESCRIPTION TX-RX unit (X57-784X-XX) Ref. No. Use/Function Operation/Condition/Compatibility IC731 EEPROM GPS log memory Ref. No. Use/Function Operation/Condition/Compatibility IC201 OP AMP IC732 Comparator A/D converter for TNC signal IC202 RF AMP TX AMP IC733 OP AMP TNC signal IC734...
Page 17 TH-D72A/D72E COMPONENTS DESCRIPTION Ref. No. Use/Function Operation/Condition/Compatibility Ref. No. Use/Function Operation/Condition/Compatibility Q512 Ripple ﬁ lter Q717,718 RX signal Q518 Switch VCO shift Q719 Switch Q521 RF AMP Band B PLL Q720 Switch Q522,523 Oscillator Band B VCO Q721,722 Lamp Q524...
Page 18: Terminal Function
TH-D72A/D72E COMPONENTS DESCRIPTION Ref. No. Use/Function Operation/Condition/Compatibility Ref. No. Use/Function Operation/Condition/Compatibility Reverse current D219 RF switch VHF TX D644 DC-IN protector D220 RF switch UHF TX D645 Constant voltage Voltage protector D221 RF switch VHF TX Reverse current D646 D222...
Page 19 TH-D72A/D72E TERMINAL FUNCTION TX-RX unit (X57-784X-XX) (C/3, A/3) Pin No. Pin Name Function : TX-RX, Control D[5] Data output CN611 CN731 D[6] Data output Name Function Pin No. Pin No. D[7] Data output CN611 – CN731 (TX-RX to Control) Power supply (3.3V) Unit power supply control Power supply (3.3V)
Page 20: Parts List
TH-D72A/D72E PARTS LIST 2 2 0 CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value 101 = 100pF Multiplier 3 = Temp.
Page 21 CC73HCH1H120G CHIP C 12PF N14-0853-04 CIRCULAR NUT (VOL/ENC) CC73HCH1H1R5B CHIP C 1.5PF N35-2004-43 BINDING HEAD MACHINE SCREW C66,67 CK73HB1H471K CHIP C 470PF 2A,1B N79-2035-48 PAN HEAD TAPTITE SCREW (PCB) C68,69 CK73HB1H102K CHIP C 1000PF K : TH-D72A E : TH-D72E...
Page 22 CC73GCH1H070B CHIP C 7.0PF C216 CC73HCH1H100D CHIP C 10PF C290 CC73GCH1H470J CHIP C 47PF C217 CC73HCH1H080B CHIP C 8.0PF C291 CC73HCH1H470J CHIP C 47PF C218 CC73HCH1H180G CHIP C 18PF C292 CK73HB1H102K CHIP C 1000PF K : TH-D72A E : TH-D72E...
Page 23 CC73HCH1H270G CHIP C 27PF C378 CC73HCH1H101J CHIP C 100PF C461 CC73HCH1H100D CHIP C 10PF C379 CK73HB1H102K CHIP C 1000PF C462 CK73HB1H471K CHIP C 470PF C380,381 CC73HCH1H181J CHIP C 180PF C463 CC73HCH1H101J CHIP C 100PF K : TH-D72A E : TH-D72E...
Page 24 CHIP C 1.0UF C551 CK73HB1H102K CHIP C 1000PF C655 CK73HB1H471K CHIP C 470PF C552 CC73HCH1H080B CHIP C 8.0PF C656 CK73EB1E106K CHIP C 10UF C553 CS77CA1VR22M CHIP TNTL 0.22UF 35WV C657 CK73GB1H104K CHIP C 0.10UF K : TH-D72A E : TH-D72E...
Page 25 CK73HB1H102K CHIP C 1000PF C739 CK73GB1H104K CHIP C 0.10UF C823 CK73FB1E475K CHIP C 4.7UF C740 CK73HB1H471K CHIP C 470PF C824 CK73HB1H561K CHIP C 560PF C740,741 CK73HB1H471K CHIP C 470PF C825 CK73HB1H472K CHIP C 4700PF K : TH-D72A E : TH-D72E...
Page 26 CK73HB1H102K CHIP C 1000PF C987 CK73HB1H102K CHIP C 1000PF C905 CK73HB1E103K CHIP C 0.010UF C989 CK73HB1A104K CHIP C 0.10UF C906,907 CK73HB1H102K CHIP C 1000PF C990 C93-1803-05 CHIP C 10UF C908,909 CC73HCH1H100D CHIP C 10PF K : TH-D72A E : TH-D72E...
Page 27 SMALL FIXED INDUCTOR (1.2UH) L41-1578-03 SMALL FIXED INDUCTOR (15NH) L431 L41-3988-14 SMALL FIXED INDUCTOR (390NH) L41-2288-03 SMALL FIXED INDUCTOR (220NH) L432 L40-1875-71 SMALL FIXED INDUCTOR (18NH) L41-2288-03 SMALL FIXED INDUCTOR (220NH) L433 L40-1085-71 SMALL FIXED INDUCTOR (100NH) K : TH-D72A E : TH-D72E...
Page 28 560K 1/16W RK74HB1J102J CHIP-COM 1.0K 1/16W RK73HB1J104J CHIP R 100K 1/16W CP10 RK74HA1J473J CHIP-COM 47K 1/16W RK73HB1J101J CHIP R 1/16W CP11-14 RK74HB1J102J CHIP-COM 1.0K 1/16W RK73HB1J560J CHIP R 1/16W RK73HB1J334J CHIP R 330K 1/16W K : TH-D72A E : TH-D72E...
Page 29 1/16W R224 RK73HB1J101J CHIP R 1/16W R384 RK73HB1J474J CHIP R 470K 1/16W R227 RK73HB1J000J CHIP R 1/16W R385,386 RK73HB1J334J CHIP R 330K 1/16W R229 RK73HB1J473J CHIP R 1/16W R387 RK73HB1J472J CHIP R 4.7K 1/16W K : TH-D72A E : TH-D72E...
Page 30 CHIP R 100K 1/16W R470 RK73HB1J101J CHIP R 1/16W R639 RK73FB2B000J CHIP R 1/8W R473 RK73HB1J103J CHIP R 1/16W R640 RK73HH1J394D CHIP R 390K 1/16W R517 RK73HB1J103J CHIP R 1/16W R641 RK73HH1J563D CHIP R 1/16W K : TH-D72A E : TH-D72E...
Page 31 680K 1/16W R727 RK73HB1J474J CHIP R 470K 1/16W R806 RK73HB1J393J CHIP R 1/16W R728,729 RK73HB1J102J CHIP R 1.0K 1/16W R807 RK73HB1J000J CHIP R 1/16W R730 RK73HB1J471J CHIP R 1/16W R808 RK73HB1J330J CHIP R 1/16W K : TH-D72A E : TH-D72E...
Page 32 CHIP R 330K 1/16W R886 RK73HB1J103J CHIP R 1/16W R966 RK73GB2A221J CHIP R 1/10W R887 RN73HH1J104D CHIP R 100K 1/16W R967 RK73HB1J000J CHIP R 1/16W R888 RK73HB1J103J CHIP R 1/16W R968 RK73HB1J100J CHIP R 1/16W K : TH-D72A E : TH-D72E...
Page 33 D523,524 1SV278F VARIABLE CAPACITANCE DIODE D525 HSC277 DIODE IC722 NJM2112V-ZB MOS-IC IC724 TC7W74FK MOS-IC D643 015AZ5.1(Y)F ZENER DIODE IC725 TA75S393F-F MOS-IC D644 RB051L-40 DIODE IC726 XC6109C28ANN ANALOGUE IC D645 HZU3BLL ZENER DIODE IC727 5F364AMDFB K : TH-D72A E : TH-D72E...
Page 34 2SC5488A-H TRANSISTOR Q611-614 SSM6L05FU-F Q615,616 SSM3J05FU-F Q642 2SK3019 Q643 2SC5706 TRANSISTOR Q644 SSM3J05FU-F Q645 2SA1832(GR)F TRANSISTOR Q646 RT1P436U-T111 TRANSISTOR Q648 2SK1830F Q649 TPC6110-F Q650 2SJ506-E(S) Q651,652 SSM6L05FU-F Q653 CPH3417 Q654 SSM6J08FU(F) Q655,656 CPH6122 TRANSISTOR K : TH-D72A E : TH-D72E...
Page 35: Exploded View
TH-D72A/D72E EXPLODED VIEW 49x3 X57 A/3 45x3 X57 C/3 16x2 B : N09-6549-04 C : N09-6554-05 X57 B/3 D : N14-0853-04 : N35-2004-43 : N79-2035-48 G : N79-2050-43 H : N80-2610-43 700 Model name plate 704 Standard label: K 701 Sticker...
Page 36: Packing
TH-D72A/D72E PACKING 12 Instruction manual (B62-2235-00) 13 Instruction manual (B62-2235-00): E 62 CD-ROM (T93-0145-05) 18 Cord with connector (USB) (E30-7360-05) 60 Whip antenna (T90-1087-05) 66 AC adapter (W08-1218-05): E 65 AC adapter (W08-1216-05): K 66 AC adapter (W08-1218-05): E 67 Battery assy (1800mAh)
Page 37: Trouble Shooting
TH-D72A/D72E TROUBLE SHOOTING After pressing the [ OK] key, the initial screen of the Built-in GPS Operation Check Method GPS Only mode is automatically displayed. after Repairs When the built-in GPS is turned ON, the main MCU sets the IGPS_TXD as High level and requires the start of the GPS data transmission to the built-in GPS.
Page 38 TH-D72A/D72E TROUBLE SHOOTING • From a cold start, it takes anywhere from 36 seconds to • The GPS satellite signal used for the position calculation 5 minutes to display the latitude and longitude. From a is displayed in the bar painted out. The length of the bar hot start, it takes anywhere from 1 second to 30 seconds is the signal strength.
Page 39: Adjustment
TH-D72A/D72E ADJUSTMENT 10. Spectrum Analyzer Updating the Firmware 1) Measuring range: DC to 1GHz or more The ﬁ rmware of the main MCU and TNC MCU can be 11. Standard Signal Generator (SSG) updated using Firmware Updating Program (s). Update the 1) Maximum frequency: 500MHz or more ﬁ...
Page 40 Battery remaining voltage display are controlled based on squelch threshold and level 2 voltage. this value. • It is not necessary for all the adjustment frequency in TH-D72A/D72E to set by the adjustment item because it is registered the inside. EEPROM setting adjustment value ■...
Page 41 TH-D72A/D72E ADJUSTMENT 6) Set item the display to “HI”, “LO” and “EL” and adjust RTC table (Compensation table) transmission power. OSC Freq. (Hz) 7) Display the “7.4V UHF” item. RTC adjust value Lower Upper 8) Set power supply voltage to 7.4V from Battery Terminal and perform steps 3 to 6 above.
Page 42 TH-D72A/D72E ADJUSTMENT • I. Balance 2 Note: CTCSS/DCS DECODE adjustment Perform CTCSS/DCS DECODE adjustment with S-meter 1) Display the “BAL2” item. adjustment at “V SM/SQ A SM FULL”. 2) Select display frequency point after press [ OK] key at “BAL2” item.
Page 43 TH-D72A/D72E ADJUSTMENT • N. S-meter/Squelch 9) Press [ OK] key to set the “adjustment value” in the EEPROM as all-segment ON value. 1) Display the “V SM/SQ A” item. 2) Select “SQ1” item after press [ OK] key at “V SM/SQ A”...
Page 44 TH-D72A/D72E ADJUSTMENT Common Section Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. Setting and 1) External power supply con- Resetting nection DC-IN terminal volt- LCD total illumination display Internal value setting display age: 13.8V...
Page 45 TH-D72A/D72E ADJUSTMENT Transmitter Section Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. Transmission Switch to Service Setup mode f. counter Tuning Write 439.9MHz±500Hz Frequency and carry out the operations for control Adjust item E.
Page 46 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 2. Power Write 12) Power: HI Power Tuning Write check 4.8W±0.05W [7.4V] Frequency: 449.900MHz K meter control Battery 439.900MHz E Ammeter Transmission 13) Power: LOW 0.5W±0.1W...
Page 47 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 3. Power Write 8) Power: EL Power Tuning Write check 75mW±25mW [13.8V] Frequency: 144.100MHz meter control DC-IN Transmission Ammeter 9) Power: EL Frequency: 147.900MHz K 145.900MHz E...
Page 48 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 4. Power 4) Power: LOW Power Check 0.2W~0.8W Check [7.4V] Frequency: 144.100MHz meter 0.9A or less Battery Transmission Ammeter 5) Power: LOW Frequency: 147.900MHz K 145.900MHz E...
Page 49 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 5. Power 4) Power: LOW Power Check 0.2W~0.8W Check Frequency: 144.100MHz meter 0.8A or less [13.8V] Transmission Ammeter DC-IN 5) Power: LOW Frequency: 147.900MHz K 145.900MHz E...
Page 50 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 6. MAX Devia- 4) Frequency: 444.100MHz K Oscillo- Tuning Write 4.2kHz±100Hz tion 435.100MHz E scope control Transmission Linear detector 5) Frequency: 410.100MHz Power...
Page 51 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 9. CTCSS Switch to Service Setup mode Power Tuning Write 0.75kHz±50Hz Deviation and carry out the operations for meter control item J. Linear...
Page 52 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 12. DTMF 1) Frequency: 146.100MHz K Check 2.0kHz~4.2kHz Deviation 145.100MHz E AF V.M Check [7.4V] Linear detector (FM p-p/2) Power LPF: 15kHz meter...
Page 53 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. RX BPF 7) Frequency: 118.05MHz [MONI] Press [MONI] key Max RSSI value Tune Write SSG: (–100dBm) 2.2µV Oscillo- for writing. scope 8) Frequency: 145.95MHz •...
Page 54 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 3. Squelch 5) Frequency: 146.050MHz K Check Open squelch Check 145.050MHz E Oscillo- Mode: FM scope • B-Band SSG: (–119dBm) 0.25µV 6) SSG: OFF Close squelch 7) Frequency: 444.05MHz K...
Page 55 TH-D72A/D72E ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 6. Sensitivity 1) Frequency: 146.05MHz K Check 12dB SINAD or more Check 145.05MHz E Distortion Mode: FM meter • A-Band SSG: (–119dBm) 0.25µV Oscillo- AF output: 0.63V/8Ω...
Page 56: Pc Board
TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section 0-11: K, 2-71: E Component side view (J79-0278-19 A/3) R939 C951 J703 J702 IC735 R831 R810 C812 C826 R823 R920 R827 R855 R900 IC727 C857 C818 R797 C872 IC716 C858 R828...
Page 57 TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section 0-11: K, 2-71: E Component side view (J79-0278-19 A/3) J701 EXT. MIC / EXT. SP J703 J79-0278-19 A/3 D726 INT SP C751 R794 C793 C753 Q713 INT MIC C792 C752 R793...
Page 58 TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section 0-11: K, 2-71: E Foil side view (J79-0278-19 A/3) C754 CN769 LCD CONTRAST D704 D712 D713 C735 C755 CN716 INT SP R790 IC736 C708 L706 INT MIC R998 C742 R807 C710...
Page 59 TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section 0-11: K, 2-71: E Foil side view (J79-0278-19 A/3) R996 R995 J79-0278-19 A/3 D704 R955 S724 S725 S726 S723 CP34 C740 R967 C712 C713 C711 D715 D721 D719 R750 R749 R973...
Page 60: Tx-Rx Unit (X57-784X-Xx) (C/3)
TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section 0-11: K, 2-71: E Component side view (J79-0278-19 C/3) J79-0278-19 C/3 C617 C615 R613 R615 C612 CN615 R439 R619 X611 CN612 CN616 R620 RST OUT CP14 C620 R440 C619 R444 CP13...
Page 61 TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section 0-11: K, 2-71: E Component side view (J79-0278-19 C/3) C170 C100 C101 C117 CD351 C147 C107 C120 C148 R113 R393 CN356 C462 LO2_A C400 R452 C392 Q434 C159 C115 R127 C104...
Page 62 TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section 0-11: K, 2-71: E Foil side view (J79-0278-19 C/3) R399 C407 C393 C386 C384 R419 C497 C492 C405 R418 L445 TH355 Q358 Q437 R383 C495 L248 C496 C484 CN204 R250 C490...
Page 63 TH-D72A/D72E PC BOARD TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section 0-11: K, 2-71: E Foil side view (J79-0278-19 C/3) R639 R462 L437 C476 C488 Q436 C475 C664 Q433 R455 R456 C514 C629 C470 L435 C469 C455 R461 IC514 C466 R666 C683...
Page 64: Interconnection Diagram
TH-D72A/D72E INTERCONNECTION DIAGRAM LCD ASSY CN703 E40-6755-05 CN715 E40-6844-05 KEY_O3 KEY_O2 KEY_O0 KEY_I4 KEY_O1 MICG MICI LAMP B KEY_I2 KEY_I3 KEY_O4 J87-0035-05 J701 E11-0703-05 MIC JACK INTMIC SP JACK INT SP X57-784 (A/3) CONTROL SECTION J702 COM PORT E11-0709-05 J703...
Page 65 TH-D72A/D72E INTERCONNECTION DIAGRAM CN719 E40-6883-05 KEY_I0 X57-784 (B/3) KEY_O4 PTT SECTION KEY_I1 CHG_TH J87-0027-05 CN731 CN611 E40-6880-05 E40-6880-05 RXD_S TXD_S DC_DET REF_A DET_B BPFA APC&BPFB X57-784 (C/3) DET_A TX-RX SECTION TC&REF_B RST_S E37-1477-05 J641 E03-0190-05 EXT. DC-IN BATT –...
Page 66: Schematic Diagram
TH-D72A/D72E SCHEMATIC DIAGRAM LCD ASSY TX-RX UNIT (X57-784X-XX)(A/3) : CONTROL SECTION C N 7 0 3 R 7 2 6 /LCD_RST JP_WR JP_WR R 7 6 1 /LCD_WR JP_A0 R762 A[0] JP_A0 C 7 6 5 JP_D0 0 . 1 u...
Page 67 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION GP_BU R 9 8 3 1 0 0 k R 9 8 4 1 0 0 k ENC1 ENC2 ENC2 SWITCH C P 3 8 GP_PS ENC1 Q 7 0 1...
Page 68 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION GP_BU GP_BU Q 7 1 6 2 S K 1 8 3 0 F 3 .3 V 4. 7 V OP AMP I C 712 SWITCH R 77 7 R 8 1 1...
Page 69 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION 1200 TData 1200 TData DAC_RST R 8 6 1 4 7 k R 8 8 6 R 8 7 9 1 0 0 k 1 0 k DAC_EN Vout7 CNT_CLK...
Page 70 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION X57-784X-XX(A/3) D729 D731 D732 1200 TData R 9 9 5 R 9 9 6 1200 TData 0-11 MA2S111-F MA2S111-F TH-D72A 2-71 TH-D72E MA2S111-F TX-RX UNIT(X57-784X-XX)(B/3):PTT SECTION FPC ASSY LAMP MONI...
Page 71 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION 1200 TData 1200 TData CN722 CHG_TH C P 5 4 RTS_USB GP_ON /SUSPEND GP_ON C P 6 4 /SUSPEND LAMP RST_USB RST_USB KEY_I1 LAMP KEY_O2 MAIN_WR KEY_I0 KEY_O2 KEY_O3 CHG_TH...
Page 72 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION 33TNC 1200 TData 3.3V VOLTAGE 3 . 3V DETECTOR I C 726 XC6109C28ANN R 9 3 2 1 V I N R933 V oU T 2 V SS C N 7 4 3...
Page 73 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION 33TNC 9600 3.3V C953 1000p R 9 6 5 I C 7 3 2 3 3 0 k TA75W393FU-F Q 7 2 9 1 . 8 V 2SC4617(R) 1200 1 o U T A...
Page 74 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT : CONTROL SECTION X57-784X-XX (A/3)-CN731 (X57-784X-XX)(C/3) : TX-RX SECTION TX-RX UNIT R X D _ S T X D _ S C _ S R E F _ A C N 6 2 1 C N 6 2 0...
Page 75 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION 33CRF CN208 CN209 DC SUPPLY REF_A D644 REVERSE Q649 D649 REVERSE SWITCH C648 SWITCH CURRENT CURRENT TPC6110-F 13.7V CURRENT STEERING Q650 PROTECTOR PROTECTOR 1000p J641 DC-IN F641 L641 2SJ506-E(S) L642...
Page 76 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION 33CRF 33CRF 2SC4617(R) REF_A D432 Q433 Q433 R455 2.5V D432,D433 MA2S077G SPEED UP D433 CV_A MA2S077G CN431 D434,435 FREQUENCY CONTROL Q435 1.1V R444 L435 R442 D435 C464 R446 R447 MCH3914(7)-H R465 0.7V...
Page 77 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION 33CRF 33CRF BPFA BPFA RF AMP 1ST MIXER 3SK294-FP 2.7V 4.5V 2.2V C111 390n 1000p 1000p 1000p 3SK294-FP 4.4V 1.6V RF SWITCH 2.2V D12,13 D24,25 1000p HSC277 BPF TUNING BPF TUNING...
Page 78 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION 33CRF BPFA RF AMP VHF RX VHF_A 3.8V 2.8V 390n 330n C163 C137 390n 1000p 270n 1000p C167 C169 3SK318 4.4V D42,43 BPF TUNING D32,33 SWITCH BPF TUNING 2SK1830F BPFB...
Page 79 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION Q644 Q661 DC SWITCH DC SWITCH Q661 UHF VCO SSM6P05FU(F) 2.4V D523 MODULATOR 3.3V Q512 2SC4617(R) 33CRF R563 C571 Q522,523 Q644 CN511 SSM3J05FU-F CV_B OSCILLATOR D520,522 2.2V Q522 FREQENCY 2.4V...
Page 80 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION T:3.7V R: 0V DC SWITCH RN4902-F 144T 144T T:4.6V Q208 R: 0V Q209 DC SWITCH SSM6L05FU-F 430T T:4.4V R: 0V Q210 DC SWITCH SSM3J05FU-F 45TX Q211 2SK1830F DC SWITCH R204 430T 2.9V...
Page 81 TH-D72A/D72E SCHEMATIC DIAGRAM TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION CN205 CN206 CN207 CN210 144T 144T C308 C314 C326 C328 C273 C264 D211 C297 C303 L219 L221 L223 L234 L236 L239 L241 D215 L244 L246 L250 L251 L252 R250 470p...
Page 82: Block Diagram
TH-D72A/D72E BLOCK DIAGRAM TX-RX UNIT (X57-784) (A/3): CONTROL SECTION TX-RX UNIT (X57-784) (C/3): T D710~D715, D718~D723 Q701 LAMP B IC718 AVR TA48S 33GP 3J05 D717 D709 033AF GPS Module FU-F VGPS GP_ON Q725 IC715 AVR TXD_IGPS RXD_IGPS TK112 Q710 Q708...
Page 83 TH-D72A/D72E BLOCK DIAGRAM 84) (C/3): TX-RX SECTION 33CB APC&BPFA Q207 Q212 IC201 IC203 IC514 Q644 Q512 LMC7101 LMC7101 XC6201P R216,R217 4902 4617 BIM5 BIM5 532DR Ripple 4617 3J05 Filter FU-F RF SW 430T APCSW D523 Q661 Q205 VTX1 1830F 6L05...
Page 84: Level Diagram
TH-D72A/D72E LEVEL DIAGRAM Transmitter Section AF (1kHz) 0.84Vp-p: 1200bps 0.5Vp-p: 9600bps 3.2Vp-p: 1200bps 2.3Vp-p: 1200bps 199mVrms: VHF 8mVrms 24mVrms 780mVrms 570mVrms 127mVrms: UHF IC712 R532 IC716 IDC & CN715 IC721 E VR filter TCXO IC714 X511 1.4Vp-p: 9600bps 1.64Vp-p: 1200bps 0.98Vp-p: 9600bps...
Page 85 TH-D72A/D72E LEVEL DIAGRAM Center Frequency –7.8dBm: VHF –10.3dBm: VHF +4.3dBm: VHF +9.5dBm: VHF –9.8dBm: UHF –8.5dBm: UHF +7.8dBm: UHF +9.3dBm: UHF 0.5W C594 C223 C248 C260 C574 IC202 Q201 Q214 Q215 TCXO X511 Note1: This is the value measured while removed from the chassis. Use a short transmission burst.
Page 86: Optional Accessories
TH-D72A/D72E OPTIONAL ACCESSORIES BT-15 PB-45L Battery Case (6 AAA/LR03) Li-ion Battery Pack (7.4V, 1800mAh)
Page 87: Specifications
TH-D72A/D72E SPECIFICATIONS General TX (VHF) 144 ~ 148MHz TH-D72A TX (UHF) 430 ~ 450MHz Band A & B TX (VHF) 144 ~ 146MHz TH-D72E TX (UHF) 430 ~ 440MHz Frequency range RX (VHF) 136 ~ 174MHz Band A RX (UHF)
Page 88 Suite 2504, 25/F, Tower 2, Nina Tower, No. 8 Yeung Uk Road, Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Tsuen Wan, New Territories, Hong Kong KENWOOD House, Dwight Road, Watford, Herts., 1 Ang Mo Kio Street 63, Singapore 569110 WD18 9EB United Kingdom...
Page 89 TH-D72A/D72E TH-D72A/D72E PC BOARD PC BOARD TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section 0-11: K, 2-71: E Component side view (J79-0278-19 A/3) 0-11: K, 2-71: E Component side view (J79-0278-19 A/3) J701 R939 C951 J703 EXT.
Page 90 TH-D72A/D72E TH-D72A/D72E PC BOARD PC BOARD TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section TX-RX UNIT (X57-784X-XX) (A/3): CONTROL section 0-11: K, 2-71: E Foil side view (J79-0278-19 A/3) 0-11: K, 2-71: E Foil side view (J79-0278-19 A/3) C754 R996 R995 J79-0278-19 A/3...
Page 91 TH-D72A/D72E TH-D72A/D72E PC BOARD PC BOARD TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section 0-11: K, 2-71: E Component side view (J79-0278-19 C/3) 0-11: K, 2-71: E Component side view (J79-0278-19 C/3) J79-0278-19 C/3 C617 C615...
Page 92 TH-D72A/D72E TH-D72A/D72E PC BOARD PC BOARD TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section TX-RX UNIT (X57-784X-XX) (C/3): TX-RX section 0-11: K, 2-71: E Foil side view (J79-0278-19 C/3) 0-11: K, 2-71: E Foil side view (J79-0278-19 C/3) R639 C497 R399 C407...
Page 93 R995 R996 33TNC 33TNC 1200 TData 1200 TData 1200 TData 1200 TData LCD ASSY R 9 8 3 1 0 0 k 0-11 TH-D72A MA2S111-F MA2S111-F 9600 R98 4 1 00 k 2-71 TH-D72E MA2S111-F ENC1 3.3V ENC2 TX-RX UNIT(X57-784X-XX)(B/3):PTT SECTION...
Page 94 IC352 100k 2SK1830F TC7W53FK(F) IF AMP BPF TUNING BPF TUNING BPF TUNING SWITCH X57-784X-XX (C/3) C219 ANALOG CD352 SWITCH 0-01 TH-D72A DET B DET B 455kHz R392 2-71 TH-D72E 1000P 2.7k X57-784X-XX (C/3) R619 R620 X57-784X-XX (C/3) C632 0-11 TH-D72A...
Page 95 LCD ASSY CN703 E40-6755-05 CN715 CN719 E40-6844-05 E40-6883-05 KEY_O3 KEY_I0 X57-784 (B/3) KEY_O2 KEY_O4 PTT SECTION KEY_O0 KEY_I1 KEY_I4 CHG_TH KEY_O1 J87-0027-05 MICG MICI LAMP B CN731 CN611 KEY_I2 E40-6880-05 E40-6880-05 KEY_I3 RXD_S KEY_O4 J87-0035-05 TXD_S DC_DET J701 E11-0703-05 MIC JACK REF_A INTMIC DET_B...
Page 96 TX-RX UNIT (X57-784) (A/3): CONTROL SECTION TX-RX UNIT (X57-784) (C/3): TX-RX SECTION D710~D715, D718~D723 33CB Q207 APC&BPFA Q212 IC201 IC203 IC514 Q644 Q701 LAMP B IC718 AVR Q512 LMC7101 LMC7101 XC6201P R216,R217 4617 4902 BIM5 BIM5 532DR Ripple TA48S 4617 3J05 33GP D717...
Page 97 Transmitter Section AF (1kHz) Center Frequency 0.84Vp-p: 1200bps 0.5Vp-p: 9600bps 3.2Vp-p: 1200bps 2.3Vp-p: 1200bps 199mVrms: VHF –7.8dBm: VHF –10.3dBm: VHF +4.3dBm: VHF +9.5dBm: VHF 8mVrms 24mVrms 780mVrms 570mVrms 127mVrms: UHF –9.8dBm: UHF –8.5dBm: UHF +7.8dBm: UHF +9.3dBm: UHF 0.5W C594 C223 C248 C260...

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