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SERVICE
MANUAL
VHF TRANSCEIVER
i2200H
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INTRODUCTION DANGER This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-2200H VHF TRANSCEIVER at the time of publica- power supply that uses more than 16 V. This will ruin the transceiver. tion. DO NOT expose the transceiver to rain, snow or any liquids. MODEL VERSION SYMBOL Europe EUR DO NOT reverse the polarities of the power supply when con- necting the transceiver. Taiwan TPE U.S.A. USA DO NOT apply an RF signal of
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS 2 - 1 IC-2200H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1 2 - 2 HM-133V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 2 SECTION 3 OPTIONAL UNIT INSTALLATION SECTION 4 CIRCUIT DESCRIPTION SECTION 5 ADJUSTMENT PROCEDURES SECTION 6 PARTS
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SECTION 1 SPECIFICATIONS M GENERAL • Frequency range : Version Receive (MHz) Transmit (MHz) 1 [EUR] 118.000 – 174.000* 144.000 – 146.000 2 [USA] 118.000 – 174.000* 144.000 – 148.000 2 2 [EXP], [EXP-1] 118.000 – 174.000* 136.000 – 174.000* [EUR-1], [TPE], 144.000 – 146.000 144.000 – 146.000 [KOR] 1 * Specifications guaranteed 144.000 – 146.000 MHz only 2 * Specifications guaranteed 144.000 – 148.000 MHz only • Mode : FM, AM (Receive only) • Number of memory channel : 206 (include in 6 band edges
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• UT-115 SPECIFICATIONS M GENERAL • Usable temperature range : –10˚C to +60˚C; +14˚F to +140˚F • Power supply requirement : 5.0 V DC (4.5 V–8.5 V for AMBE IC VCC line) • AF input level : 1 Vp-p typical • Modulation output level : 350 mVp-p typical • Demodulation input level : 500 mVp-p typical • AF output level : 750 mVp-p typical • CODEC type : AMBE • Transfer speed : 4.8 kbps • Control signal input voltage : 3.0 V–5.0 V for High 0 V for Low • Control signal output voltage : Open collector for
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SECTION 2 INSIDE VIEWS 2-1 IC-2200H • MAIN UNIT (TOP VIEW) P Po ow wer module er module P Po ow wer s er switch circuit witch circuit (IC10: (IC10: S-A S-AV36) V36) Q28*: Q28*: 2SC4684 2SC4684 Q30: Q30: DT DTA143TU A143TUA A Q31: Q31: DTC143ZU DTC143ZU Speak Speaker er Discr Discriminator iminator (X2: (X2: CDB450C24) CDB450C24) 2nd IF filter IF filter AF po AF pow wer amplifier er amplifier FI1: FI1: CFWS450F CFWS450F (IC9: (IC9: T TA7252AP) A7252AP) FI2: FI2: CFWS450HT CFWS450HT AG AGC C
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2-2 HM-133V Reset IC Reset IC (IC3: BD5245G) (IC3: BD5245G) CPU CPU (IC1: (IC1: µµ PD789071) PD789071) LED driver LED driver Q4, Q5: 2SA1586 Q4, Q5: 2SA1586 DS1 DS11*: L 1*: LT1EP53A T1EP53A LED driver LED driver Q6, Q7: 2SA1586 Q6, Q7: 2SA1586 DS10*: L DS10*: LT1EP53A T1EP53A EE-PROM EE-PROM (IC6: BR24L02FV) IC6: BR24L02FV [MAIN-A] unit only 5V regulator 5V regulator Q1: 2SC2712 Q1: 2SC2712 D1: MA8056 D1: MA8056 Data buf Data buffer circuit fer circuit Q2: DTC1 Q2: DTC114EU 14EU Regulat
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SECTION 3 OPTIONAL UNIT INSTALLATION ➀ Remove [DIAL] and unscrew the 2 allen-socket bolts from ➄ Intall the unit as illustrated below. Insert tightly to avoid 1 the front panel using with an allen wrench (2.5 mm; ⁄10″). bad contact. Flat cable Allen-socket bolts Insulation sheet ➁ Detach the front panel from the main unit. ➅ Return the front panel and the allen-socket bolts to their original position. NOTE: When attaching the front panel to the main unit, ➂ Attach the insulation sheet (supplied
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SECTION 4 CIRCUIT DESCRIPTION The tunable bandpass filters (D13–D16) employ varactor 4-1 RECEIVER CIRCUITS diodes to tune the center frequency of the RF passband for 4-1-1 ANTENNA SWITCHING CIRCUIT wide bandwidth receiving and good image response rejec- (MAIN UNIT) tion. These diodes are controlled by the CPU (LOGIC unit; The antenna switching circuit functions as a low-pass filter IC1) via the D/A convertor (IC5). while receiving and a resonator circuit while transmitting. The circuit does not
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The 2nd IF signal from the 2nd mixer (IC4, pin 3) passes The audio signals are applied to the AF mute switch (MAIN through the ceramic filter (FI1) (during wide channel spacing unit; Q29) via the VOL adjust pot (R61). The signals are selection or passes through FI2 during narrow channel amplified at the AF amplifier (MAIN unit; IC9, pin 1) to obtain spacing selection; [W/N] only). 2.4 W audio output power after being passed through the emphasis switch (MAIN unit; Q41). The amplified AF signals a
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• IN CASE OF ANALOG AF SIGNALS 4-2 TRANSMITTER CIRCUITS The AF signals are applied to the DI/AN switch (IC522, pin 4-2-1 MICROPHONE AMPLIFIER CIRCUIT 9), and are then reapplied to the switch (pin 4) from pin (LOGIC unit) 8.The signals output from the switch (pin 3) as analog AF The microphone amplifier circuit amplifies audio signals with signals , and are then applied to the modulation circuit after +6 dB/octave pre-emphasis characteristics from the micro- being passed through the J3 via the “
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4-2-7 APC CIRCUIT (MAIN UNIT) An oscillated signal from the VCO passes thorough the LO and buffer amplifiers (Q9, Q12) is applied to the PLL IC (IC1, The APC circuit protects the power amplifier from a mis- pin 6) and is prescaled in the PLL IC based on the divided matched output load and stabilizes the output power. ratio (N-data). The reference signal is generated at the ref- erence oscillator (X1) and is also applied to the PLL IC. The The APC detector circuit (D14, D17, L39) detects forward
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4-5 PORT ALLOCATIONS 4-3-3 REFERENCE OSCILLATOR CONTROL CIRCUIT (LOGIC AND MAIN UNITS) 4-5-1 D/A CONVERTER IC (MAIN UNIT; IC5) The reference oscillator control circuit changes the refer- Pin Port Description ence frequency when using digital voice function. number name Outputs RF tracking voltage while When digital voice signals output from the optional digital 2 T3 receiving. voice unit, the “REFMOD” signal outputs from it via the J4 (pin 4) at the same time. The “REFMOD” signal is applied to 3
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4-5-3 CPU (LOGIC UNIT; IC1) Pin Port Description Pin Port number name Description number name 53–55 IS0–IS2 Output initial matrix strobe signals. Input port for the CTCSS/DTCS sig- 56, 57 KS1, KS2 Output key scan signals 1 CTCIN nals. Input ports for the keyboard matrix Input port for squelch volume detect- 58–61 KR3–KR0 signals. 2 SQLV ing signal. Input port for the [PTT] switch signal. Input port for the [∫] and [√] switches 62 PTT High: While transmitting. 3 MICUD from the external microphone
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4-6 UT-115 CIRCUIT DESCRIPTION 4-7 UT-115 POWER SUPPLY CIRCUITS 4-6-1 RECEIVER CIRCUIT VOLTAGE LINES The detected digital signals “FMDET” from the connected Description Line transceiver via the J301 (pin 22) are amplified at the buffer amplifier (IC251, pin 2). The amplified signals are applied to The 5 V voltage from the connected transceiver the GMSK modem circuit (IC252, pin 11), and are then via the J301 (pin 29). The 5V line is controlled by applied to the CPU (IC204) as clock synchronizer
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4-8-2 CPU (IC2) Pin Port Description number name Input port for the reset signal from the 7 RES reset IC (IC203, pin 1). Low :The CPU is reset. 10 OSC2 Outputs 9.8304 MHz reference signal. Input port for 9.8304 MHz reference 11 OSC1 signal. Outputs 3.2V regulator circuit (IC2, 16 APWR pin 3) control signal. Outputs receive AF mute control signal to the connected transceiver via the 29 RMUTE_C J301 (pin 24). High :While muting. Outputs PTT signal to the connected 31 PTTOUT_C transceiver via the
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SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION Enter the adjustment mode when adjusting the IC-2200H Then the JIG cable as shown the page 5-2 is required . REQUIRED TEST EQUIPMENT EQUIPMENT GREDE AND RANGE EQUIPMENT GREDE AND RENGE Output voltage : 13.8 V DC Frequency range : 0–400 MHz DC power supply FM deviation meter Current capacity : 20 A or more Measuring range : 0 to ±5 kHz Measuring range : 0.1–100 W Frequency range : DC–400 MHz Oscilloscope RF power meter Frequency range : 50–400 MHz
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‘ ‘ CONNECTIONS FM DEVIATION ATTENUATOR METER 50 dB or 60 dB RF POWER METER POWER SUPPLY 50 , 1 80 W 13.8 V, 20 A or more STANDARD SIGNAL GENERATOR 0.1 300 MHz 127 to 17 dBm (0.1 V to 32 mV) CAUTION! DO NOT transmit while an SSG is connected to the antenna connector. JIG CABLE INFORMATION AUDIO GENERATOR 300 Hz to 3 kHz pin 7 (GND) pin 4 (PTT) NOTE: DO NOT adjust items with "*" mark at below explanation. Those items are adjusted automatically when other adjustment items are adj
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5-2 SOFTWARE ADJUSTMENTS (TRANSMITTING AND RECEIVING) ADJUSTMENT ADJUSTMENT CONDITION OPERATION REFERENCE 1 • Operating frequency : 146.0 MHz • Turn the [DIAL] to set to 146.0000 MHz. FREQUENCY • Loosely couple a frequency counter to the antenna • Push the [S.MW] key. [Fr] connector on the rear panel. • Transmitting REFERENCE 1 • Operating frequency : 146.0 MHz • Push the [S.MW] key. VOLTAGE • Receiving [rE] VHF 1 • Operating frequency : 146.0 MHz • Turn the [DIAL] to set the VHF high power to 6
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SOFTWARE ADJUSTMENTS (TRANSMITTING AND RECEIVING)–Continued ADJUSTMENT ADJUSTMENT CONDITION OPERATION DIGITAL 1 • Operating frequency : 146.0 MHz • Turn the [DIAL] to set to ±0.85 kHz. REFERENCE • IF bandwidth : Wide • Push the [S.MW] key after finish adjustment. DEVIATION • No audio signal is applied to the [MIC] jack. • Connect an FM deviation meter to the antenna con- [dt+DIGITAL] nector and set as : HPF : OFF LPF : 20 kHz De-emphasis : OFF Detector : (P–P)/2 • Transmitting RECEIVER 1 • Opera
