Kenwood TH-F6A Service Manual
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Kenwood TH-F6A Service Manual

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See also: Service Manual , Instruction Manual
144/220/440MHz FM TRIBANDER / 144/430MHz FM DUAL BANDER
TH-F6A/F7E
SERVICE MANUAL
KNOB(PTT/MONI)
(K29-9108-13)
KEY TOP
(K29-9107-12)
WHIP ANTENNA
(T90-0781-05):K
(T90-0789-05):T,E
KNOB(ENC)
DISASSEMBLY FOR REPAIR .................................................. 2
(K29-5159-03)
KNOB(VOL)
CIRCUIT DESCRIPTION .......................................................... 4
(K29-5150-03)
DESCRIPTION OF COMPONENTS ....................................... 14
PARTS LIST ............................................................................ 19
FRONT GLASS
EXPLODED VIEW .................................................................. 32
(B10-2685-13):T,E
(B10-2723-13):K
PACKING ................................................................................ 33
CAP
ADJUSTMENT ........................................................................ 34
(B09-0615-23)
PC BOARD VIEWS
CABINET ASSY
TX-RX UNIT (CONTROL SECTION) ...................................... 59
(A02-3620-13):T,E
TX-RX UNIT ............................................................................ 65
(A02-3719-13):K
TX-RX UNIT (VCO SECTION) ................................................ 71
SCHEMATIC DIAGRAM ......................................................... 73
BLOCK DIAGRAM .................................................................. 81
LEVEL DIAGRAM ................................................................... 83
OPTIONS ................................................................................ 85
SPECIFICATIONS .................................................................. 86
©
2001-8 PRINTED IN JAPAN
B51-8580-00 (S) 798
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  • Page 1: Table Of Contents

    144/220/440MHz FM TRIBANDER / 144/430MHz FM DUAL BANDER TH-F6A/F7E SERVICE MANUAL © 2001-8 PRINTED IN JAPAN B51-8580-00 (S) 798 WHIP ANTENNA (T90-0781-05):K (T90-0789-05):T,E CONTENTS KNOB(PTT/MONI) KNOB(ENC) (K29-9108-13) DISASSEMBLY FOR REPAIR ..........2 (K29-5159-03) KNOB(VOL) CIRCUIT DESCRIPTION ............4 (K29-5150-03) DESCRIPTION OF COMPONENTS ........14 PARTS LIST ................

  • Page 2: Disassembly For Repair

    TH-F6A/F7E DISASSEMBLY FOR REPAIR 1. How to remove the case assembly from the chassis: 1. Remove 2 screws (1). 2. Remove 2 knobs (2) and 2 round nuts (3). 3. Remove the SP/MIC jack cover (4). 4. Open the bottom part of case assembly and lift the front panel from the chassis (5).
  • Page 3 TH-F6A/F7E DISASSEMBLY FOR REPAIR 3. Soldering the Bar antenna wires 5. Assembling a release latch Before solding the bar antenna wires, form the wires as Place a coil spring(1) on the release latch(2) as shown in shown in the figure 2.

  • Page 4: Circuit Description

    TH-F6A/F7E CIRCUIT DESCRIPTION 1. A band receiver system 1-1-3. Circuits following IF The signal heterodowned to the first IF of 59.85 MHz by the 1-1. Receiver circuit mixer (Q45) passes through a 15kHz MCF (XF2) and unwanted The A band can receive signals in two bands: VHF (220 MHz signal components are eliminated.
  • Page 5 TH-F6A/F7E CIRCUIT DESCRIPTION The first amplifier is divided into four bands: 100 kHz - 50 signal demodulated by the diode detection circuit is output. MHz, 50MHz - 108MHz, 108 MHz - 265 MHz, 265 MHz - 600 2-1-2. SSB/CW receiver circuit MHz, and 600 MHz - 1.3 GHz.
  • Page 6 TH-F6A/F7E CIRCUIT DESCRIPTION 2-2-3. Third mixer IC706 M62364 The third mixer (IC4) works in SSB/CW mode only. The local oscillator signal of 450 kHz +/- 2 kHz is produced in SSB Q22,29 UPA672T mode to restore 2kHz correction (offset), and the signal of 450...
  • Page 7 PLL loop. The PLL is divided for A band reception, B band reception and transmission. Each VCO has oscillator frequency shift control. For relationships between VCO oscillator frequencies and shifts, see Table 4-11. TH-F6A Frequency Construction A band RX Double Super Heterodyne Audio 2nd IF...
  • Page 8 TH-F6A/F7E CIRCUIT DESCRIPTION * TH-F6A Frequency Construction B band RX FM mode Double Super Heterodyne Audio Amplifier 2nd IF 1st IF Mixer Mixer Devider 2nd LO Multiplyer Fig.9 2nd IF 1st IF 2nd LO RX Freq. Range [MHz] VCO Oscillation [MHz]...
  • Page 9 TH-F6A/F7E CIRCUIT DESCRIPTION * TH-F7 Frequency Construction A band RX Double Super Heterodyne Audio 2nd IF 1st IF 1st Mixer Amplifier Mixer 2nd LO Fig.11 RX Freq. Range VCO Oscillation 1st IF 2nd LO 2nd IF [MHz] [MHz] 1st Mix.
  • Page 10 TH-F6A/F7E CIRCUIT DESCRIPTION * TH-F7 Frequency Construction B band RX FM mode Double Super Heterodyne Audio 2nd IF 1st IF Amplifier Mixer Mixer Devider 2nd LO Multiplyer Fig.13 1st IF 2nd LO 2nd IF RX Freq. Range [MHz] VCO Oscillation [MHz]...
  • Page 11 TH-F6A/F7E CIRCUIT DESCRIPTION 4-1. A band reception Each VCO output is amplified by a common amplifier Q37. In VHF/UHF band reception, the signal passes through a low- IC6 functions as A band reception PLL. This PLL IC controls pass filter, is amplified by Q40, then by a common local the VCO produced by Q34.
  • Page 12 TH-F6A/F7E CIRCUIT DESCRIPTION 5. Lithium ion battery charging control If a lithium ion battery is installed, it is charged when power C23 1000p is supplied to the DCIN JACK from outside. The mechanism C24 100p 2.5A of charging control is described below.
  • Page 13 TH-F6A/F7E CIRCUIT DESCRIPTION IC703 TONE & 96H AMP TC7S66FU IC719 DTMF IC706 M62364 MUTE SW MIC AMP PRE-EMPHASIS Q9MT6C03AE D18 HVC131 Q701 Q707 IC702 IC701 D11,12 2SC4617 TA75W HVC3758 D709 2102F 558FU D21 HVC131 RB706F-40 D10,16 HVC3758 LIMITTER Q726 2SC4919...

  • Page 14: Description Of Components

    TH-F6A/F7E DESCRIPTION OF COMPONENTS (X14-6750-00) Ref. No. DESCRIPTION NAME Use/function Ref. No. DESCRIPTION NAME Use/function Charge IC B band RF AGC ATT PLL IC B band RX TX PLL Lock voltage detect SW A band PLL IC power supply voltage...
  • Page 15 TH-F6A/F7E DESCRIPTION OF COMPONENTS Ref. No. DESCRIPTION NAME Use/function Ref. No. DESCRIPTION NAME Use/function D115 RF SW MIXER B band D116 ATT SW B band 50 to 108MHz ON:receive AF SW B band AF output SW ATT on B band FM / W-FM power supply SW...
  • Page 16 TH-F6A/F7E DESCRIPTION OF COMPONENTS / SEMICONDUCTOR DATA Microcomputer pin functions :µPD784216(IC705) Ref. No. DESCRIPTION NAME Use/function Q701 VOX AMP I/O Pin name Active level Function Q702 impedance 9600bps transmitter B band PLL lock detect Q703 BEAT SHIFT H:Lock Q704 AF SP MUTE SW...

  • Page 17: Semiconductor Data

    TH-F6A/F7E SEMICONDUCTOR DATA I/O Pin name Active level Function I/O Pin name Active level Function LAPS Key, LCD ilumination power BPFB B band BPF PWM output supply H:ON input with the bar antenna Audio amp power supply SW, VRAS A Band receiver power supply...
  • Page 18 TH-F6A/F7E SEMICONDUCTOR DATA Terminal Functions Connecter No. NO Name Terminal function Connecter No. NO Name Terminal function APC & TUNEA APC&A band BPF tuning voltage MBOUT B band VCO output signal Band matching switch PLF1 PLL filter switch DBCV B band VCO control voltage...

  • Page 19: Parts List

    TH-F6A/F7E PARTS LIST ∗ New Parts. L: Scandinavia K: USA P: Canada indicates safety critical components. Y: PX (Far East, Hawaii) T: England E: Europe Parts without Parts No. are not supplied. Y: AAFES (Europe) X: Australia M: Other Areas Les articles non mentionnes dans le Parts No.
  • Page 20 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts CC73HCH1H101J CHIP C 100PF C123 CC73HCH1H101J CHIP C 100PF C92-0518-05 CHIP-TAN 0.22UF 20WV C126 CK73FB1C105K CHIP C 1.0UF...
  • Page 21 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts C209 CC73HCH1H101J CHIP C 100PF C283 CK73HB1H471K CHIP C 470PF C210 CC73HCH1H330J CHIP C 33PF C284 CC73HCH1H090D CHIP C 9.0PF...
  • Page 22 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts C376 CC73HCH1H050C CHIP C 5.0PF C463-474 CK73HB1C103K CHIP C 0.010UF K C475 CK73HB1H471K CHIP C 470PF C377 CK73HB1A104K CHIP C 0.10UF...
  • Page 23 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts C546-548 CK73HB1E472K CHIP C 4700PF C654 CC73GCH1H150J CHIP C 15PF C549 CK73HB1H102K CHIP C 1000PF C655 CK73HB1H471K CHIP C...
  • Page 24 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts C743 C92-0628-05 CHIP-TAN 10UF 10WV C825,826 CK73HB1H471K CHIP C 470PF C744,745 CK73HB1H471K CHIP C 470PF C827,828 CK73HB1C103K CHIP C 0.010UF K...
  • Page 25 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts ∗ L1,2 L40-1091-86 SMALL FIXED INDUCTOR(1.0U) L41-1575-01 SMALL FIXED INDUCTOR ∗ L92-0149-05 FERRITE CHIP L41-2275-01 SMALL FIXED INDUCTOR ∗...
  • Page 26 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts L191 L40-1091-37 SMALL FIXED INDUCTOR(1.000UH) RK73HB1J152J CHIP R 1.5K J 1/16W L192 L40-2285-54 SMALL FIXED INDUCTOR(220NH) RK73HB1J105J CHIP R 1.0M...
  • Page 27 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts R112 RK73HB1J473J CHIP R J 1/16W R191,192 RK73HB1J222J CHIP R 2.2K J 1/16W R113 RK73HB1J102J CHIP R 1.0K...
  • Page 28 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts R279 RK73HB1J105J CHIP R 1.0M J 1/16W R375 RK73HB1J473J CHIP R J 1/16W R280 RK73HB1J682J CHIP R 6.8K...
  • Page 29 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts R721 RK73HB1J183J CHIP R J 1/16W R783 R92-1368-05 CHIP R 0 OHM R722 R92-1368-05 CHIP R 0 OHM...
  • Page 30 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts R860,861 RK73HB1J103J CHIP R J 1/16W 1SS388 DIODE R862 RK73HB1J184J CHIP R 180K J 1/16W RB717F DIODE R863...
  • Page 31 TH-F6A/F7E PARTS LIST TX-RX UNIT (X57-6360-00) Ref. No. Adrress Parts No. Description Destination Ref. No. Adrress Parts No. Description Destination parts parts ∗ TK10931V ANALOG IC DTA114YE DIGITAL TRANSISTOR ∗ LMX2326TMX MOS IC 2SK1824 TA31136FN MOS IC 2SK1830 2SC4617(R) TRANSISTOR...

  • Page 32: Exploded View

    TH-F6A/F7E EXPLODED VIEW A : N09-1492-05 E : N79-2035-45 F : N79-2040-46 G: N80-2008-45 H : N83-2006-45 Parts with exploded numbers larger than 700 are not suppied.

  • Page 33: Packing

    TH-F6A/F7E PACKING 9 INSTRUCTION MANUAL (ENG/SPA) (B62-1441-00):K,T,E INSTRUCTION MANUAL (FRE/ITA) (B62-1442-00):E 701 WARRANTY CARD INSTRUCTION MANUAL (NET/GER) 703 PACKING FIXTURE 702 PAMPHLET (B62-1443-00):E 51 AC ADAPTER (W08-0927-05):K (W08-0928-05):E (W08-0929-05):T 39 HANDSTRAP (J69-0342-05) 50 WHIP ANTENNA 48 LINE FILTER (T90-0781-05):K (L79-1417-05):T,E...

  • Page 34: Adjustment

    TH-F6A/F7E ADJUSTMENT REQUIRED TEST EQUIPMENT Adjustment service jig 1. Stabilized Power Supply 1 The supply voltage can be changed between 3V and 16V and the current is 1A or more. 2 The standard voltage is 13.8V. 2. DC Ammeter (DC.A)
  • Page 35 TH-F6A/F7E ADJUSTMENT Example Single tone transmission • It is used to replace the EEPROM, readjust it, or review the Function Overview design in a service center. • This function enables you to transmit a single tone. Operation Example • It is used to adjust DTMF deviation during production.
  • Page 36 TH-F6A/F7E ADJUSTMENT • If the operation band is A band, no adjustment is required, C. BPF adjustment 1) Display the “BPF” item. and the following message appears. Operations 4) and 5) 2) Select points f1 to f3 as shown in the “Frequency are invalid.
  • Page 37 TH-F6A/F7E ADJUSTMENT • Frequency/mode adjustment points • To adjust “AM radio” or “HF” band, the bar antenna must be activated (factory default: ON). Band Mode Adjustment point A band 144MHz FM 2 points (Threshold, level 2) H. APC adjustment 220MHz FM...
  • Page 38 TH-F6A/F7E ADJUSTMENT Power supply 6) Press [MNU] key to set the “real-time value” in the Band Power Frequency adjustment point voltage EEPROM. 13.8[v] 220MHz H 3 points (f1, f2, f3) K destination only 7) Adjust all frequency adjustment points. 3 points (f1, f2, f3) K destination only 144.000...
  • Page 39 TH-F6A/F7E ADJUSTMENT • If no adjustment is necessary for an item (for example, 50 L. DCS deviation adjustment 1) Display the “DCS” item. MHz f2), the following message appears. Operations 5) and 2) Set the A band as the operation band.
  • Page 40 TH-F6A/F7E ADJUSTMENT Common section Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method 1. Setting and 1) External power supply resetting connection DC IN terminal LCD total illumination display Internal value setting display after all resetting voltage: 13.8V...
  • Page 41 TH-F6A/F7E ADJUSTMENT Receiver section Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method 1. 2nd Local Switch to Service Setup mode f.counter TX-RX Tuning Write and carry out the operations for item D. Spectrum control 1) B-Band analyzer 57.1500MHz ±...
  • Page 42 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method SSB BFO Align Switch to Service Setup mode and carry out the operations for item E. B-Band Tuning 1KHz ± 50Hz 1) USB Oscilloscope control Write Frequency:145.800MHz...
  • Page 43 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Squelch write 9) Frequency:438.100MHz (FM) TX-RX TX-RX MNU key Write SQL1 SSG:(-125dBm) 0.126µV SQL2 SSG:(-120dBm) 0.22µV 10)Frequency:1270.100MHz (FM) SQL1 SSG:(-120dBm) 0.22µV SQL2 SSG:(-115dBm) 0.398µV Item Conditions...
  • Page 44 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method S-meter write Switch to Service Setup mode TX-RX TX-RX MNU key Write and carry out the operations for item G. A-Band 1) Frequency:145.050MHz (FM) SSG:(-124dBm) 0.141µV...
  • Page 45 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method S-meter write 11)Frequency:1270.100MHz (FM) SSG TX-RX TX-RX MNU key Write SSG:(-115dBm) 0.398µV FULL SSG:(-100dBm) 2.24µV 12)Frequency:90.100MHz (W-FM) SSG:(-95dBm) 3.98µV FULL SSG:(-70dBm) 70.8µV 13)Frequency:200.100MHz (W-FM) SSG:(-95dBm) 3.98µV FULL SSG:(-70dBm) 70.8µV...
  • Page 46 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method S-meter check 14)SSG:(-105dBm) 1.3µV±3dB TX-RX Check All segments in S-meter lights Frequency:222.100MHz(K) (B/3) One segment in S-meter lights SSG:(-117dBm) 0.32µV±3dB Frequency:230.100MHz(E,T) SSG:(-113dBm) 0.5µV±3dB SSG:(-105dBm) 1.3µV±3dB(K) All segments in S-meter lights SSG:(-100dBm) 2.24µV±3dB(E,T)
  • Page 47 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Sensitivity check 6) Frequency:449.990MHz(K) TX-RX Check 12dB SINAD or more Frequency:439.990MHz(E,T) Distortion (B/3) Mode:FM meter SSG:(-121dBm) 0.2µV Oscilloscope AF output:0.63V/8Ω 7) Frequency:223.550MHz(K) SSG:(-120dBm) 0.22µV 8) Frequency:216.000MHz(K) SSG:(-103dBm) 1.58µV...
  • Page 48 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Sensitivity check 25)Frequency:107.900MHz TX-RX Check 12dB SINAD or more Mode:FM Distortion (B/3) SSG:(-93dBm) 5.01µV meter AF output:0.63V/8Ω Oscilloscope 26)Frequency:500.100MHz Mode:FM SSG:(-100dBm) 2.24µV AF output:0.63V/8Ω 27)Frequency:90.100MHz Mode:WFM SSG:(-78dBm) 28.2µV...
  • Page 49 TH-F6A/F7E ADJUSTMENT Transmitter section Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Transmission Switch to Service Setup mode Frequency and carry out the operations for item B. Adjust 1) POWER:EL f. counter Tuning Write Frequency:444.000MHz (K) control 435.100MHz ±...
  • Page 50 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Power Write 15)Power:Low Power meter MNU key Write [6.0V] Frequency:449.995MHz (K) Am meter Battery Frequency:439.995MHz (E,T) 16)Power:EL MNU key Write Frequency:444.000MHz (K) Frequency:435.000MHz (E,T) 17)Power:EL MNU key Write Frequency:438.050MHz (K)
  • Page 51 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Power write 8) Power:EL Power meter MNU key Write [7.4V] Frequency:144.050MHz (K) Am meter Battery 9) Power:EL MNU key Write Frequency:147.995MHz (K) Frequency:145.995MHz (E,T) 10)Power:Hi Tuning Write check Frequency:444.000MHz (K)
  • Page 52 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Power write 27)Power:EL Power meter MNU key Write [7.4V] Frequency:224.995MHz (K) Am meter Power write DC IN:13.8V Power meter Tuning Write check [13.8V] 1) Power:Hi Am meter...
  • Page 53 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method 0.5W ± 0.05W Power write 16)Power:EL Power meter Tuning Write check [13.8V] Frequency:444.000MHz (K) Am meter control 0.9A or less DC-IN Frequency:435.000MHz (E,T) Transmission 17)Power:EL Frequency:438.050MHz (K) MNU key Write Frequency:430.050MHz (E,T)
  • Page 54 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Power check Battery Terminal:7.4V DC.A TX-RX Check [7.4V] Power:Hi Power meter (B/3) 4.5W~5.4W Battery 1) Frequency:146.000MHz (K) 2.1A or less Frequency:145.000MHz (E,T) 2) Frequency:144.050MHz 3) Frequency:147.995MHz (K) Frequency:145.995MHz (E,T)
  • Page 55 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Power check Power:Low DC.A TX-RX Check 0.3W~0.7W [7.4V] 22)Frequency:224.000MHz (K) Power meter (B/3) 0.9A or less Battery 23)Frequency:222.050MHz (K) 24)Frequency:224.995MHz (K) Power:EL 50mW~100mW 25)Frequency:224.000MHz (K) 26)Frequency:222.050MHz (K) 27)Frequency:224.995MHz (K)
  • Page 56 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method Power check Power:Hi DC.A TX-RX Check [138V] 19)Frequency:224.000MHz (K) Power meter (B/3) 4.5W~5.4W DC-IN Transmission 2.1A or less 20)Frequency:222.050MHz (K) Transmission 21)Frequency:224.995MHz (K) Transmission Power:Low 22)Frequency:224.000MHz (K) 1.6W~2.4W...
  • Page 57 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method VOX Sencitivity Switch to Service Setup mode write and carry out the operations for item N. 1) Frequency:146.000MHz (K) MNU key Write Frequency:145.000MHz (E,T) VOX1 AG:1KHz/50mV Transmission 2) Frequency:146.000MHz (K)
  • Page 58 TH-F6A/F7E ADJUSTMENT Item Conditions Measurement Adjustment Specifications/Remarks Test equipment Unit Terminal Unit Parts Method CTCSS Dev. Switch to Service Setup mode and carry out the operations for item K. 0.8KHz ± 50Hz 1) Frequency:146.000MHz (K) Power meter Tuning Write Frequency:145.000MHz (E,T)
  • Page 59 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT (X57-636X-XX) (A/3) Component Side View CONTROL SECTION(A/3) CONTROL SECTION (Component side) C733 R853 C732 R752 IC719 C844 D714 D715 R758 R859 S704 D725 D724 C846 R837 C847 R857 R842 D712 D723 D721 R760 D713...
  • Page 60 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT (X57-636X-XX) (A/3) Foil Side View CONTROL SECTION LMC7101BIM5 LM2681 CONTROL SECTION(A/3) (Foil side) D719 S702 S703 S701 R739 C880 C769 C724 R775 C767 R773 XC6202P402PR IC710 C783 CN716 OPOFF/TES/IMO/ID R738 CP708 CP710 CP712 C765...
  • Page 61 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT (X57-636X-XX) (A/3) Component Side View + Foil Side View CONTROL SECTION(A/3) CONTROL SECTION (Component + Foil side) DTC114EE C733 D719 R853 C732 R752 2SC4617 S703 S702 S701 IC719 R739 C844 C880 D714 C769 D715...
  • Page 62 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT (X57-686X-XX) (B/3) Component Side View TX-RX UNIT(B/3) (Component side) C152 C171 R297 L117 C557 L116 C553 C552 C611 C554 R298 D116 C551 C547 R341 C537 D102 C351 R382 C315 R332 L194 D101 C350 R406...
  • Page 63 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT (X57-686X-XX) (B/3) Foil Side View TX-RX UNIT(B/3) (Foil side) Q100 C665 C133 C134 C151 C130 C170 C173 C150 C163 C164 C177 R360 D115 C180 C656 R376 C182 R361 C549 C556 C544 C546 R375 R365...
  • Page 64 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT (X57-686X-XX) (B/3) Component Side View + Foil Side View DTA114YE 2SD1760 2SC5192 UMX2N 2SK1830 TX-RX UNIT(B/3) (Component side + Foil side) DTA143ZE 2SK3019 DTC123JE DTC144EE 2SC4226 2SC4617 2SC4725 Q100 C665 3SK320 2SC5009 2SC5108 C133...

  • Page 65: Tx-Rx Unit

    TH-F6A/F7E PC BOARD VIEW TX-RX UNIT VCO SECTION(C/3) (Component side) VCO SECTION (X57-636X-XX) (C/3) Component Side View R311 DTC144EE 2SC4617 2SC5009 2SC5108 R312 R167 R166 HN1J02FU C568 C658 C253 R306 R159 R158 R160 C237 C245 C249 R153 R156 R307 C238...
  • Page 66 TH-F6A/F7E PC BOARD VIEW TX-RX UNIT VCO SECTION (X57-636X-XX) (C/3) Component Side View + Foil Side View VCO SECTION(C/3) (Component side + Foil side) R311 R312 R167 R166 C568 C658 C253 R306 R159 R158 R160 C237 C245 C249 R153 R156...

  • Page 67: Schematic Diagram

    TH-F6A/F7E SCHEMATIC DIAGRAM...
  • Page 68 TH-F6A/F7E SCHEMATIC DIAGRAM...

  • Page 69: Block Diagram

    TH-F6A/F7E TH-F6A/F7E BLOCK DIAGRAM...

  • Page 70: Level Diagram

    TH-F6A/F7E TH-F6A/F7E LEVEL DIAGRAM All voltage levels must be measured at "H" output power position. The RF and IF sections are inspected by using a spectrum analyzer. After setting the standard (1 kHz, 3 kHz Dev.) deviation, each voltage of the AF section is inspected by using an AF VTVM or osciloscope.

  • Page 71: Options

    TH-F6A/F7E OPTIONS BT-13 Battery Case (4 AA/ LR6) BT-13 PARTS LIST COVER Ref. No. Adrress Parts No. Description Destination parts ∗ A02-3729-08 CABINET ∗ F07-1864-08 COVER CABINET PB-42L PG-2W PG-3J SMC-32 Li-ion Battery Pack DC Power Cable Cigarette Lighter Power Speaker Microhone (7.4V, 1500 mAh)

  • Page 72: Specifications

    TH-F6A/F7E SPECIFICATIONS l a i l a i v i t ˚ 0 ˚ 0 ˚ 4 ˚ 0 ˚ 0 ˚ 0 ˚ 4 ˚ 2 ± ˚ 0 ˚ 0 l i b y t i ± ˚ 0 ˚...
  • Page 73 TH-F6A/F7E SPECIFICATIONS ≤ < ≤ < µ µ µ µ µ µ µ µ µ µ µ µ v i t y t i µ µ µ µ µ µ µ µ µ µ µ µ v i t y t i...
  • Page 74 KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD. KENWOOD ELECTRONICS U.K. LIMITED Sales Marketing Division KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom 1 Ang Mo Kio Street 63, Singapore 569110 KENWOOD ELECTRONICS EUROPE B.V. Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands...

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