Page 1
PCR1500_2500.pdf The service manual for IC-PCR1500 and IC-PCR2500 including all service information in this CD. This file is mainly used for viewing on the computer display and checking page order to make printed service manual. Or when you want to find a component, you can find very fast using “FIND”...
Page 4
Addresses are provided on the inside back cover for your before connecting equipment to the receiver. convenience. Icom, Icom Inc. and logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.
Page 10
• MAIN-B UNIT (IC-PCR2500 only) TOP VIEW BOTTOM VIEW HF filter circuits ATT circuits 1st mixer (IC14: SPM5001) 1st VCO circuits +5V regulator (Q23: UNR9111) 1st IF amplifier (Q44: 3SK131) PLL 3.3V regulator (IC9: S-812C33AMC) 2st VCO circuits 2nd mixer (IC19: TA4107F) Buffer RSSI meter amplifier...
Page 11
SECTION 3 DISASSEMBLY INSTRUCTIONS • Removing the top cover and shield covers r Remove the shield covers D and E* in the direction of q Unscrew 8 screws, A. the arrow. w Unplug the connectors B and C from the LOGIC unit. e Remove the top cover in the direction of the arrow.
SECTION 4 CIRCUIT DESCRIPTION The 50–1300 MHz signals from the antenna are passed 4-1 RECEIVE CIRCUITS through the anttenuator (D1, D3), band switch (D7) and LPF 4-1-1RF CIRCUITS (MAIN-A/-B UNITS) (L5, C33, C34), then applied to one of the RF circuit. The MAIN-A UNIT has eight RF circuits and one down converter circuit to provide wide receiving range.
Page 13
• 1300–3300 MHz* In FM or AM mode, the 2nd IF signal is passed through the The 1300–3300 MHz signals from the antenna are applied to FI5 (band width=50 kHz) via mode switches (D66, D70), the down converter circuit where those signals are converted into the lower frequencies.
Page 14
<3rd IF AND DEMODULATOR CIRCUITS (FM)> D73 FI9 3rd IF signal to the AM demodulator circuits D95 FI8 10.25 MHz 3rd IF amp. TCXO 3rd LO signal D72 FI7 amp. amp. Noise Noise Amp. Detector D/A converter Limit’r Quodrature Amp. RSSI Detector IF IC (IC24)
pulse-type signal at the noise detector section, and output • 1st VCO’s from pin 13 as the “NOIS” signal. The “NOIS” signal is The 1st VCO is composed by two VCO’s; as the 1st LO applied to the CPU (IC18, pin 16). And the CPU outputs signal generator for 0.01–483.29 MHz and 483.3–3300 MHz control signals “LSTB,”...
The phase difference is output from pin 5 as a pulse type The phase difference is output from pin 5 as a pulse type signal after being passed through the internal charge pump. signal after being passed through the internal charge pump. The output signal is applied to the VCO (Q19, D43) after The output signal is applied to the VCO (Q27, Q28, D52, being converted into the DC voltage (lock voltage) at the...
4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE DESTINATION VOLTAGE LINE DESTINATION Same voltage as the connected power supply. AP5V Optional UT-122. AF+8V AF power amplifi er (IC12). OP5V Optional UT-108/UT-118. Electric volume (IC17), tone fi lter (IC21), AF switch A+5V (IC4, IC23), etc. MAIN-A UNIT.
4-5 CPU PORT ALLOCATION PORT DESCRIPTION NAME 4-5-1 CPU (LOGIC UNIT; IC18) Input port for mute signal from the attached PORT DESCRIPTION RXMUTE optional unit via the pin 24 of J2018. NAME “High”=While the audio output is muted. Outputs strobe signal to the expander (MAIN-B BMST2 Outputs control signal to the AF switch (IC4, UNIT;...
SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION When adjusting IC-PCR1500/PCR2500, controller for the R1500/R2500 and JIG cable (see the illust below) are required. ¤ REQUIRED TEST EQUIPMENTS EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Frequency range : 0.1–3300 MHz Standard signal Output level : 0.1 µV to 32 mV...
Page 20
<FOR IC-PCR1500 ADJUSTMENT> • CONTROLLER ¤ ENTERING ADJUSTMENT MODE q Set the direction of the [VOL] to 12 o'clock (11–1 o'clock). [VOL] w Push and hold [TS•MODE]+[ATT•PRIO]+[NB•AGC] [SET•LOCK] [TS•MODE] +[MONI•T/T-SCAN] key, and turn the power switch (MAIN UNIT) ON. ¤ KEY ASSIGNMENTS FOR THE ADJUSTMENT MODE •...
5-2 MAIN-A UNIT ADJUSTMENT ADJUSTMENT OPERATION VALUE REFERENCE 1 • Connect a frequency counter to the J5 connector on the MAIN-A 10.25000 MHz FREQUENCY UNIT (see the illust below). [REF] 2 • Push [TS•MODE]/[SET•SKIP] to store the set value. 1 • Preset the adjustment items as below before the “BPF“ adjustment. Automatic adjustment [LT1]–[HTF] [AGA]...
Page 22
5-2 MAIN-A UNIT ADJUSTMENT (coninued) ADJUSTMENT OPERATION VALUE S-METER 1 • Set the SSG as; Automatic adjustment [NS0]–[WS6] Frequency : Specifi ed frequency* Modulation : None † Level : Specifi ed level 2 • Push [TS•MODE]/[SET•SKIP] to store the adjustment value. –...
5-3 MAIN-B UNIT ADJUSTMENT (PCR2500 only) ADJUSTMENT OPERATION VALUE 1 • Set the adjustment items as below before the “BPF” adjustment. Automatic adjustment [LT1]–[HTF] [AGA] : “8A” [IFA] : “25” 2 • Connect an SSG to the antenna connector “ANT1” and set as; Frequency : Specifi...
Page 24
5-3 MAIN-B UNIT ADJUSTMENT (PCR2500 only; continued) ADJUSTMENT OPERATION VALUE S-METER 1 • Set the SSG as; Automatic adjustment [NS0]–[WS6] Frequency : Specifi ed frequency* Modulation : None † Level : Specifi ed level 2 • Push [SET•SKIP] to store the adjustment value. –...
Page 48
SECTION SECTION 8 SEMICONDUCTOR INFORMATION PARTS LIST • TRANSISTORS AND FET'S • DIODES NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW 1SR154-400 1SS400 1SV284 2SA1832 GR 2SK880 Y XP4311 1SV286 1SV308 MA2S077 MA2S111 MA2S728 2SB1123 T-TD...
Page 49
SECTION 9 BOARD LAYOUTS The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. Power switch Internal speaker • LOGIC UNIT (TOP VIEW) (J4:CHASSIS) (CHASSIS: SP1) J2022 J2021 to MAIN-A unit “J2”...
Page 51
The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. • MAIN-A UNIT (TOP VIEW) WFDT SCAD SMAD NOIS FDET to LOGIC unit “J24” IFOUT MST2 DPSTB MST0 P1STB P2STB MST1...
The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. • UT-122 (Optinal product: DIGTAL UNIT for [IC-PCR2500: USA-3]) (TOP VIEW) CIRQ D IF FLASH RXD AFOUT CPU RES FLASH TXD RMUT TEMP...
Page 56
• UT-122 (Optinal product: DIGTAL UNIT for [IC-PCR2500: USA-3]) (BOTTOM VIEW) 9 - 8...
Need help?
Do you have a question about the IC-PCR1500 and is the answer not in the manual?
Questions and answers