Benutzeranleitung / Produktwartung IC F121S des Produzenten Icom
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SER VICE MANU AL VHF TRANSCEIVER iF110S iF111S iF121S.
INTRODUCTION This service manual describes the latest service information for the IC-F1 10S, IC-F1 1 1S and IC-F121S VHF MOBILE TRANSCEIVER at the time of publication. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V .
T ABLE OF CONTENTS SECTION 1 SPECIFICA TIONS SECTION 2 INSIDE VIEW SECTION 3 DISASSEMBL Y INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 1 SECTION 1 SPECIFICA TIONS All stated specifications are subject to change without notice or obligation. Measurement method Frequency coverage T ype of emission Number of conventional channels Antenna impedance Power supply voltage (negative ground) Current drain (approx.
2 - 1 SECTION 2 INSIDE VIEW Antenna switch/ Low-pass filter circuit Mixer* (Q3: 3SK299) 2nd IF filter* (FI2: ALFYM450F=K) D/A conv er ter* (IC6: M62363FP-650C) IF IC (IC1: T A31136FN) 1st IF filter (FI1: FL-335) * Located under side of the point.
3 - 1 SECTION 3 DISASSEMBL Y INSTRUCTIONS • Opening case and remove the front panel ➀ Unscrew 4 screws A , and remove the bottom cover . ➁ Disconnect the flat cable B from J2. ➂ Disconnect the cable C from J7. ➃ Unscrew 2 screws D , and remove the front unit in the direction of the arrow .
SECTION 4 CIRCUIT DESCRIPTION 4 - 1 4-1 RECEIVER CIRCUITS 4-1-1 ANTENNA SWITCHING CIRCUIT (MAIN UNIT) The antenna switching circuit functions as a low-pass filter while receiving and as resonator circuit while transmitting. This circuit does not allow transmit signals to enter the receiver circuits.
4 - 2 4-1-5 AF AMPLIFIER CIRCUIT (MAIN UNIT) The AF amplifier circuit amplifies the demodulated AF sig- nals to drive a speaker . The AF signals from the FM IF IC (IC1, pin 9) are applied to the active filter circuit (IC16). The active filter circuit (high- pass filter) removes CTCSS or DTCS signals.
4 - 3 4-2-4 POWER AMPLIFIER CIRCUIT (MAIN UNIT) The power amplifier circuit amplifies the driver signal to an output power level. The RF signal from the drive amplifier (Q8) is passed through the low-pass filter circuit (L18, C90, C89) and applied to the power module (IC3) to obtain 25 W or 50 W of RF power .
4-4 POWER SUPPL Y CIRCUITS 4-4-1 VOL T AGE LINES (MAIN UNIT) 4-5 PORT ALLOCA TIONS 4-5-1 LED DRIVER (FRONT UNIT ; IC4) 4-5-2 OUTPUT EXP ANDER (MAIN UNIT ; IC6) 4-5-3 CPU (FRONT UNIT ; IC1) Output LEDs control signals. Low : While LEDs are ON. Outputs BUSY LED control signal.
CPU-Continued 4 - 5 Outputs control signal for the power switching circuit (MAIN unit; Q24, Q23). Outputs IF bandwidth control signal. Low : While IF bandwidth is narrow . Outputs control signal for the AF mute circuit (MAIN unit; Q35, Q36, D29). High : While AF amplifier (MAIN unit; IC8) is activated.
5 - 1 SECTION 5 ADJUSTMENT PROCEDURES + A udio generator 300 Hz to 3 kHz AC millivoltmeter MICE MIC PTT PTT switch PTTE Add a jumper wire here • *OPC-1122 (JIG CABLE) Electrolytic capacitor 47 µ F .
5 - 2 P ersonal computer to the MIC connector to an RS-232C por t DB9 f emale plug RS-232C cable (straight) *OPC-1122 (JIG CABLE) A C millivoltmeter Audio generator FM de viation meter (DC measurab le) Attenuator 40 dB or 50 dB to the antenna connector to DC cable Standard signal generator –127 to –17 dBm (0.
5 - 3 CS-F100S ADJ Rev .1.0 File COM 1: OPEN Option Connect Reload (F5) Disp para [A / D] VIN : 178 : B2h : 19.96 V TEMPS : 177 : B1h : 26.44 'C L VIN : 176 : B0h : 3.
LV PLL lock v oltage check point C133 PLL lock v oltage adjustment f or TX C134 PLL lock v oltage adjustment f or RX DC power supply 13.2 V / 15 A 5 - 4 5-2 PLL ADJUSTMENT PLL LOCK VOL T AGE 1 2 3 4 • Operating freq. : 174.000 MHz • Receiving • Output power : Low1 • T ransmitting • Operating freq.
5 - 5 5-3 SOFTW ARE ADJUSTMENT Select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard. 1 1 2 3 1 2 1 2 1 • Operating freq. : 174.000 MHz • Output power : Low1 • Connect the RF power meter or 50 Ω dummy load to the antenna connector .
5 - 6 *The output level of the standard signal generator (SSG) is indicated as the SSG ’ s open circuit. SOFTW ARE ADJUSTMENT – continued Select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard.
5 - 7 TX/RX 1 2 3 4 R59 Beep volume adjustment 5-4 TRIMMER ADJUSTMENT • Make this adjustment if necessary (For example, when beep sound is too loud or too soft). • BE CAREFUL!: 5-tone calling beep sound becomes loud or soft when beep volume adjusts to loud or soft.
[FRONT UNIT] [FRONT UNIT] IC1 1 140010890 S.IC HD6433687A05FP IC2 1 1 10005770 S.IC S-80942CNMC-G9C-T2 IC3 1 130010390 S.IC HN58X2416TI IC4 1 130009670 S.IC BU2092FV -E2 IC5 1 1 10005340 S.IC NJM12902V -TE1 Q1 1530002060 S.TRANSISTOR 2SC4081 T106 R Q2 1590001050 S.
S.=Surface mount [MAIN UNIT] [FRONT UNIT] J2 6510022470 S.CONNECTOR 40FL T -SM1-TB DS1 5040002670 S.LED CL-165HR/YG DS2 5040002310 S.LED SML-31 1YTT86 DS3 5040002310 S.LED SML-31 1YTT86 DS4 5040002310 S.LED SML-31 1YTT86 DS5 5040002310 S.LED SML-31 1YTT86 DS6 5040002310 S.
S.=Surface mount [MAIN UNIT] [MAIN UNIT] R5 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 k Ω ) A 7030003610 S.RESISTOR ERJ3GEYJ 273 V (27 k Ω ) B R6 7030003610 S.RESISTOR ERJ3GEYJ 273 V (27 k Ω ) B 7030003620 S.RESISTOR ERJ3GEYJ 333 V (33 k Ω ) A R7 7030003370 S.
S.=Surface mount [MAIN UNIT] [MAIN UNIT] R215 7030003400 S.RESISTOR ERJ3GEYJ 471 V (470 Ω ) R216 7030003470 S.RESISTOR ERJ3GEYJ 182 V (1.8 k Ω ) B 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 k Ω ) A R217 7030003600 S.RESISTOR ERJ3GEYJ 223 V (22 k Ω ) R218 7030003600 S.
S.=Surface mount [MAIN UNIT] [MAIN UNIT] C92 4030007030 S.CERAMIC C1608 CH 1H 150J-T C93 4030007020 S.CERAMIC C1608 CH 1H 120J-T C94 4030007090 S.CERAMIC C1608 CH 1H 470J-T C95 4030006860 S.CERAMIC C1608 JB 1H 102K-T C96 4030006860 S.CERAMIC C1608 JB 1H 102K-T C97 4030007090 S.
[MAIN UNIT] C305 4030007100 S.CERAMIC C1608 CH 1H 560J-T C306 4030009910 S.CERAMIC C1608 CH 1H 040B-T C307 4030006980 S.CERAMIC C1608 CH 1H 070D-T C308 4030009530 S.CERAMIC C1608 CH 1H 030B-T C309 4030006900 S.CERAMIC C1608 JB 1H 103K-T C310 4030006860 S.
SECTION 7 MECHANICAL P ARTS 7 - 1 MC1 MP1 + MP2 MP9 MP10 W2 W1 MP3 MP4 MP5 MP6 MP7 MP8 IC O M LCD-STICKER J1 6510004880 Connector MR-DS-E 01 1 MP1 8010019060 2601 chassis [25W] 1 8010019130 2601 long .
MP8 (C) R14 (F) J1 (F) MP10 (F) W1 (F) MP7 (F) MP8 (F) FRONT UNIT Unit abbreviations ( F): FRONT UNIT (M): MAIN UNIT (C): CHASSIS P AR TS MP4 (F) MP3 (F) MP5 (F) MP1 (F) SP1 (F) MP2 (F) MP9 (F) MP5 (C.
SECTION 8 SEMI-CONDUCT OR INFORMA TION • TRANSISTORS AND FET’S • DIODES B E C B E C B E C B E C B E C B E C B E C B C E G G D D S S S D G G S D D S G2 G1 B E C B E C B E C E1 B1 B2 C1 C2 E1 E2 B.
SECTION 9 BO ARD LA Y OUTS 9-1 FR ONT UNIT • T OP VIEW 1 4 8 5 8V 1 to Microphone 7 28 J1 AFO MICE GND CLO PTT MIC CLI 9 - 1.
1 16 20 11 1 17 14 8 10 17 32 33 48 49 64 13 9 2 to MAIN unit J2 40 J2 DIM D AST RMUT MMUT OPT3 OPT2 OPT1 BUSY SCK SI SO CIRQ CCS MIC EPTT HORNO BEEP PWON 8V GND GND TO N E TENC NOIS NWC TMUT UNLK PLS.
ANT CHASSIS J1 to DC cable W2 1 4 8 5 1 8 16 9 1 8 16 9 1 to Optional unit 15 30 16 J1 GND 5V VCC NC AFONO BEEPO NC DET DISC NC CCS CIRQ SO SI SCK PTTI PTT O MCO T MCIN NC BUSY NC SIGO OPT1 OPT2 OPT3 .
SP 14 8 1 1 7 14 8 7 12 24 1 13 9 - 4 • BO TT OM VIEW (MAIN UNIT).
SECTION 10 BLOCK DIAGRAM DISC MIC AFO BEEP 8V MCOT MIC MOD RSSI MIXER 8V CSFT 19.6608 MHz BEEP F D E DET DISC J6 MAIN UNIT FRONT UNIT J1 CTCSS/DTCS DEC 5/2 TONE DEC J1 BEEP0 AFANO 182.
SECTION 11 V OL T A GE DIA GRAMS 11-1 FRONT UNIT J2 DIM DAST RMUT MMUT OPT3 OPT2 OPT1 BUSY SCK SI SO CIRQ CCS MIC EPTT HORNO BEEP PWON 8V GND GND TONE TENC NOIS NWC TMUT UNLK PLST CDEC SDEC OV12 RSSI .
11-2 MAIN UNIT J1 SCK SI SO CIRQ CCS DISC DET BEEPO AFONO OV12 DAST OPT3 OPT2 OPT1 SIGO BUSY R266 47k R267 27k R268 10k R265 18k R270 100k R264 68k R269 100k R263 1M R262 1M R261 1M CP24 CP25 R271 100k MIC C311 0.
MAIN UNIT (1) BUS LINE2 C110 470p L41 68n R75 120k C105 0.001 Q12 2SC5107 R8V C104 0.001 R74 120k L22 68n R76 470 R73 100 C109 0.001 C102 10p R71 100 Q11 2SC5107 R310 8.2k R311 220 C335 0.001 C301 0.001 R234 8.2k L21 82n Q10 2SC5107 C100 10p D14 MA77 D15 MA77 R69 4.
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1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan S-13906HZ-C1VS- e © 2003 Icom Inc..
SER VICE MANU AL UHF TRANSCEIVER iF210S iF211S iF221S.
INTRODUCTION This service manual describes the latest service information for the IC-F210S, IC-F21 1S and IC-F221S UHF MOBILE TRANSCEIVER at the time of publication. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V .
T ABLE OF CONTENTS SECTION 1 SPECIFICA TIONS SECTION 2 INSIDE VIEW SECTION 3 DISASSEMBL Y INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 1 SECTION 1 SPECIFICA TIONS All stated specifications are subject to change without notice or obligation. Measurement method Frequency coverage T ype of emission Number of conventional channels Power supply voltage (negative ground) Current drain (approx.
2 - 1 SECTION 2 INSIDE VIEW Antenna switch/ Low-pass filter circuit Mixer* (Q3: 3SK299) 2nd IF filter* (FI2: ALFYM450F=K) D/A conv er ter* (IC6: M62363FP-650C) IF IC (IC1: T A31136FN) 1st IF filter FI1: FL-335 [EUR] FL-313 [USA],[GEN] * Located under side of the point.
3 - 1 SECTION 3 DISASSEMBL Y INSTR UCTIONS • Opening case and removing the front unit q Unscrew 4 scre ws A , and remove the bottom co ver . w Disconnect the flat cable B from J2. e Disconnect the cable C from J7. r Unscrew 2 scre ws D , and remove the front unit in the direction of the arrow .
SECTION 4 CIRCUIT DESCRIPTION 4 - 1 4-1 RECEIVER CIRCUITS 4-1-1 ANTENNA SWITCHING CIRCUIT ( MAIN UNIT ) The antenna switching circuit functions as a low-pass filter while receiving and as resonator circuit while transmitting. This circuit does not allow transmit signals to enter the receiver circuits.
4 - 2 4-1-5 AF AMPLIFIER CIRCUIT (MAIN UNIT) The AF amplifier circuit amplifies the demodulated AF sig- nals to drive a speaker . The AF signals from the FM IF IC (IC1, pin 9) are applied to the active filter circuit (IC16). The active filter circuit (high- pass filter) removes CTCSS or DTCS signals.
4 - 3 4-2-4 POWER AMPLIFIER CIRCUIT (MAIN UNIT) The power amplifier circuit amplifies the driver signal to an output power level. The RF signal from the drive amplifier (Q8) is passed through the low-pass filter circuit (L18, C90, C89) and applied to the power module (IC3) to obtain 25 W or 45 W of RF power .
4-4 POWER SUPPL Y CIRCUITS 4-4-1 VOL T AGE LINES (MAIN UNIT) 4-5 PORT ALLOCA TIONS 4-5-1 LED DRIVER (FRONT UNIT ; IC4) 4-5-2 OUTPUT EXP ANDER (MAIN unit; IC6) 4-5-3 CPU (FRONT UNIT ; IC1) Output LEDs control signals. Low : While LEDs are ON. Outputs BUSY LED control signal.
CPU-Continued 4 - 5 Outputs control signal for the power switching circuit (MAIN unit; Q23, Q24). Outputs IF bandwidth control signal. Low : While IF bandwidth is narrow . Outputs control signal for the AF mute circuit (MAIN unit; Q35, Q36, D29). High : While AF amplifier (MAIN unit; IC8) is activated.
5 - 1 SECTION 5 ADJUSTMENT PROCEDURES + A udio generator 300 Hz to 3 kHz AC millivoltmeter MICE MIC PTT PTT switch PTTE Add a jumper wire here • *OPC-1122 (JIG CABLE) Electrolytic capacitor 47 µ F .
5 - 2 P ersonal computer to the MIC connector to an RS-232C por t DB9 f emale plug RS-232C cable (straight) *OPC-1122 (JIG CABLE) A C millivoltmeter Audio generator FM de viation meter (DC measurab le) Attenuator 40 dB or 50 dB to the antenna connector to DC cable Standard signal generator –127 to –17 dBm (0.
5 - 3 CS-F100S ADJ Rev .1.0 File COM 1: OPEN Option Connect Reload (F5) Disp para [A / D] VIN : 178 : B2h : 19.96 V TEMPS : 177 : B1h : 26.44 'C L VIN : 176 : B0h : 3.
C133 PLL lock v oltage adjustment f or RX C134 PLL lock v oltage adjustment f or TX LV PLL lock v oltage check point DC power supply 13.2 V / 15z A 5 - 4 5-2 PLL ADJUSTMENT PLL LOCK VOL T AGE 1 2 3 4 • Operating freq. : 400.000 MHz [L] 440.000 MHz [H] • Receiving • Output power : Low1 • T ransmitting • Operating freq.
5 - 5 5-3 SOFTW ARE ADJUSTMENT Select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard. 1 1 2 3 1 2 1 2 1 • Operating freq. : 490.000 MHz 430.000 MHz • Output power : Low1 • Connect the RF power meter or 50 Ω dummy load to the antenna connector .
5 - 6 *The output level of the standard signal generator (SSG) is indicated as the SSG ’ s open circuit. SOFTW ARE ADJUSTMENT – continued Select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard.
5 - 7 TX/RX 1 2 3 4 R59 Beep volume adjustment 5-4 TRIMMER ADJUSTMENT • Make this adjustment if necessary (For example, when beep sound is too loud or too soft). • BE CAREFUL!: 5-tone calling beep sound becomes loud or soft when beep volume adjusts to loud or soft.
[FRONT UNIT] [FRONT UNIT] IC1 1 140010890 S.IC HD6433687A05FP IC2 1 1 10005770 S.IC S-80942CNMC-G9C-T2 IC3 1 130010390 S.IC HN58X2416TI IC4 1 130009670 S.IC BU2092FV -E2 IC5 1 1 10005340 S.IC NJM12902V -TE1 Q1 1530002060 S.TRANSISTOR 2SC4081 T106 R Q2 1590001050 S.
J2 6510022470 S.CONNECTOR 40FL T -SM1-TB DS1 5040002670 S.LED CL-165HR/YG DS2 5040002310 S.LED SML-31 1YTT86 DS3 5040002310 S.LED SML-31 1YTT86 DS4 5040002310 S.LED SML-31 1YTT86 DS5 5040002310 S.LED SML-31 1YTT86 DS6 5040002310 S.LED SML-31 1YTT86 DS7 5040002310 S.
S.=Surface mount [MAIN UNIT] [MAIN UNIT] L32 6200005690 S.COIL ELJRE 18NG-F H , I L33 6200002850 S.COIL NL 252018T -R82J L35 6200002840 S.COIL NL 252018T -R22J L37 6200006980 S.COIL ELJRE R10G-F L38 6200005690 S.COIL ELJRE 18NG-F L41 6200005710 S.COIL ELJRE 27NG-F R1 7030000620 S.
S.=Surface mount [MAIN UNIT] [MAIN UNIT] R195 7030003490 S.RESISTOR ERJ3GEYJ 272 V (2.7 k Ω ) R196 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 k Ω ) R197 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 k Ω ) R198 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 k Ω ) R199 7030003560 S.
S.=Surface mount [MAIN UNIT] [MAIN UNIT] C77 4030006860 S.CERAMIC C1608 JB 1H 102K-T C78 4030006860 S.CERAMIC C1608 JB 1H 102K-T C79 403001 1810 S.CERAMIC C1608 JB 1A 224K-T C80 4030006880 S.CERAMIC C1608 JB 1H 472K-T C81 4030006860 S.CERAMIC C1608 JB 1H 102K-T C82 403001 1040 S.
EP1 6910013370 S.BEAD BLM18BB221SN1D EP3 691001 1560 BEAD HF70BB4.5X5X1.6 EP4 6910010280 BEAD HF70BB9.5X10.4X4.9 EP5 6910010280 BEAD HF70BB9.5X10.4X4.9 EP6 0910055595 PCB B 5895E REF ORDER DESCRIPTION NO. NO. S.=Surface mount [MAIN UNIT] C293 4030006860 S.
SECTION 7 MECHANICAL P ARTS 7 - 1 MC1 MP1 + MP2 MP9 MP10 W2 W1 MP3 MP4 MP5 MP6 MP7 MP8 IC O M LCD-STICKER J1 6510004880 Connector MR-DS-E 01 1 MP1 8010019060 2601 chassis [25W] 1 8010019130 2601 long .
MP8 (C) R14 (F) J1 (F) MP10 (F) W1 (F) MP7 (F) MP8 (F) MP12 (C) FRONT UNIT Unit abbreviations ( F): FRONT UNIT (M): MAIN UNIT (C): CHASSIS P AR TS MP4 (F) MP3 (F) MP5 (F) MP1 (F) SP1 (F) MP2 (F) MP9 (.
SECTION 8 SEMI-CONDUCT OR INFORMA TION • TRANSISTORS AND FET’S • DIODES B E C B E C B E C B E C B E C G G D D S S D G S B C E B E C B E C S D G G S D D S G2 G1 D S G2 G1 B E C B E C B E C E1 B1 .
SECTION 9 BO ARD LA Y OUTS 9-1 FR ONT UNIT • T OP VIEW 1 4 8 5 8V 1 to Microphone 7 28 J1 AFO MICE GND CLO PTT MIC CLI 9 - 1.
1 16 20 11 1 17 14 8 10 17 32 33 48 49 64 13 9 2 to MAIN unit J2 40 J2 DIM D AST RMUT MMUT OPT3 OPT2 OPT1 BUSY SCK SI SO CIRQ CCS MIC EPTT HORNO BEEP PWON 8V GND GND TO N E TENC NOIS NWC TMUT UNLK PLS.
ANT CHASSIS J1 to DC cable W2 1 4 8 5 1 8 16 9 1 8 16 9 1 to Optional unit 15 30 16 J1 GND 5V VCC NC AFONO BEEPO NC DET DISC NC CCS CIRQ SO SI SCK PTTI PTT O MCO T MCIN NC BUSY NC SIGO OPT1 OPT2 OPT3 .
SP 14 8 1 1 7 14 8 7 12 24 1 13 9 - 4 • BO TT OM VIEW (MAIN UNIT).
SECTION 10 BLOCK DIAGRAM MIC AFO BEEP 8V MCOT MIC MOD RSSI MIXER 8V CSFT 19.6608 MHz BEEP F D E DET DISC J6 MAIN UNIT FRONT UNIT J1 CTCSS/DTCS DEC 5/2 TONE DEC J1 BEEP0 AFANO 353.
SECTION 11 V OL T A GE DIA GRAMS 11-1 FRONT UNIT J2 DIM DAST RMUT MMUT OPT3 OPT2 OPT1 BUSY SCK SI SO CIRQ CCS MIC EPTT HORNO BEEP PWON 8V GND GND TONE TENC NOIS NWC TMUT UNLK PLST CDEC SDEC OV12 RSSI .
11-2 MAIN UNIT J1 SCK SI SO CIRQ CCS DISC DET BEEPO AFONO OV12 DAST OPT3 OPT2 OPT1 SIGO BUSY R266 47k R267 27k R268 10k R265 18k R270 100k R264 68k R269 100k R263 1M R262 1M R261 1M CP8 CP9 R271 100 MIC C311 0.
MAIN UNIT (1) BUS LINE2 C110 470p L41 27n R75 150k C105 0.001 Q12 2SC5107 R8V C104 0.001 R74 100k R72 470 R76 220 R73 100 C109 0.001 C102 12p R71 33 Q11 2SC5107 C365 6p C301 470p R234 47k 22n/27n L21 Q10 2SC5107 C100 10p C98 2p R66 100k R65 220 L20 27n C101 0.
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1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan S-13906HZ-C1US- w C 2002, 2003 Icom Inc..
Ein wichtiger Punkt beim Kauf des Geräts Icom IC F121S (oder sogar vor seinem Kauf) ist das durchlesen seiner Bedienungsanleitung. Dies sollten wir wegen ein paar einfacher Gründe machen:
Wenn Sie Icom IC F121S noch nicht gekauft haben, ist jetzt ein guter Moment, um sich mit den grundliegenden Daten des Produkts bekannt zu machen. Schauen Sie zuerst die ersten Seiten der Anleitung durch, die Sie oben finden. Dort finden Sie die wichtigsten technischen Daten für Icom IC F121S - auf diese Weise prüfen Sie, ob das Gerät Ihren Wünschen entspricht. Wenn Sie tiefer in die Benutzeranleitung von Icom IC F121S reinschauen, lernen Sie alle zugänglichen Produktfunktionen kennen, sowie erhalten Informationen über die Nutzung. Die Informationen, die Sie über Icom IC F121S erhalten, werden Ihnen bestimmt bei der Kaufentscheidung helfen.
Wenn Sie aber schon Icom IC F121S besitzen, und noch keine Gelegenheit dazu hatten, die Bedienungsanleitung zu lesen, sollten Sie es aufgrund der oben beschriebenen Gründe machen. Sie erfahren dann, ob Sie die zugänglichen Funktionen richtig genutzt haben, aber auch, ob Sie keine Fehler begangen haben, die den Nutzungszeitraum von Icom IC F121S verkürzen könnten.
Jedoch ist die eine der wichtigsten Rollen, die eine Bedienungsanleitung für den Nutzer spielt, die Hilfe bei der Lösung von Problemen mit Icom IC F121S. Sie finden dort fast immer Troubleshooting, also die am häufigsten auftauchenden Störungen und Mängel bei Icom IC F121S gemeinsam mit Hinweisen bezüglich der Arten ihrer Lösung. Sogar wenn es Ihnen nicht gelingen sollte das Problem alleine zu bewältigen, die Anleitung zeigt Ihnen die weitere Vorgehensweise – den Kontakt zur Kundenberatung oder dem naheliegenden Service.
