Icom IC-F5012, IC-F5013, IC-F5011, IC-F5013H Service Manual

VHF MOBILE TRANSCEIVERS

S-14712XZ-C1
Feb. 2011

INTRODUCTION CAUTION

This service manual describes the latest technical
information for the IC-F5011, IC-F5012, IC-F5013 and
IC-F5013H VHF MOBILE TRANSCEIVER, at the time of
publication.

CHANNEL

MODEL VERSION

IC-F5011 [USA-01] 12.5/25.0 50 W

IC-F5012 [EUR-01] 12.5/20.0/25.0

IC-F5013 [EXP-01]

IC-F5013H [EXP-02] 50 W

SPACING

(kHz)

12.5/25.0

TX OUTPUT

POWER

25 W

NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than the specified voltage.
This will ruin the transceiver.

DO NOT expose the transceiver to rain, snow or any liquids.

DO NOT reverse the polarities of the power supply when

connecting the transceiver.

DO NOT apply an RF signal of more than 20 dBm (100 mW) to
the antenna connector. This could damage the transceiver’s
front-end.

To upgrade quality, any electrical or mechanical parts
and internal circuits are subject to change without notice
or obligation.

ORDERING PARTS

Be sure to include the following four points when ordering
replacement parts:

1. 10-digit Icom part number

2. Component name

3. Equipment model name and unit name

4. Quantity required

<ORDER EXAMPLE>

1110007320 S.IC NJM2591V IC-F5012 MAIN UNIT 5 pieces

8820001210 Screw 2438 screw IC-F5013 Top cover 10 pieces

Addresses are provided on the inside back cover for your
convenience.

REPAIR NOTES

1. Make sure that the problem is internal before
disassembling the transceiver.

2. DO NOT open the transceiver until the transceiver is
disconnected from its power source.

3. DO NOT force any of the variable components. Turn
them slowly and smoothly.

4. DO NOT short any circuits or electronic parts. An
insulated tuning tool MUST be used for all adjustments.

5. DO NOT keep power ON for a long time when the
transceiver is defective.

6. DO NOT transmit power into a Standard Signal
Generator or a Sweep Generator.

7. ALWAYS connect a 50 dB to 60 dB attenuator between
the transceiver and a Deviation Meter or Spectrum
Analyzer, when using such test equipment.

8. READ the instructions of the test equipment throughly
before connecting it to the transceiver.

Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the
United Kingdom, Germany, France, Spain, Russia and/or other countries.

TABLE OF CONTENTS

SECTION 1 SPECIFICATIONS

SECTION 2 INSIDE VIEWS

SECTION 3 DISASSEMBLY INSTRUCTION]

SECTION 4 OPTIONAL PRODUCTS INSTALLATION

SECTION 5 CIRCUIT DESCRIPITON

5-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5-3 FREQUENCY SYNTHESIZER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-4 VOLTAGE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-5 PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

SECTION 6 ADJUSTMENT PROCEDURES

6-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-2 FREQUENCY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6-3 TRANSMIT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

6-4 RECEIVE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

SECTION 7 PARTS LIST

SECTION 8 MECHANICAL PARTS

SECTION 9 BOARD LAYOUTS

SECTION 10 BLOCK DIAGRAM

SECTION 11 VOLTAGE DIAGRAM

SECTION 1. SPECIFICATIONS

[USA], [EXP] [EUR]

• Frequency coverage 136–174 MHz

• Type of emission Wide 16K0F3E (25.0 kHz)

Middle – 14K0F3E (20.0 kHz)

Narrow 11K0F3E (12.5 kHz) 8K50F3E (12.5 kHz)

• Number of conventional channels 8

• Antenna impedance

• Operating temperature range –30˚C to +60˚C (−22˚F to +140˚F) –25˚C to +55˚C

• Power supply requirement (Nominal) 13.6 V DC (Negative ground) 13.2 V DC (Negative ground)

• Current drain
(Approximately)

GENERAL

• Dimensions
(Projections not included)

• Weight

• Transmit output power [25 W ver.] 25 W (High), 10 W (Low2), 2.5 W (Low1)

• Modulation Variable reactance frequency modulation

• Max. permissible deviation Wide ±5.0 kHz

• Frequency error ±2.5 ppm ±1.5 kHz

• Spurious emission 70 dB min. 0.25 µW (≤1 GHz), 1.0 µW (>1 GHz)

• Adjacent channel power Wide 70 dB min.

• Audio frequency response +1 dB to –3 dB of 6 dB/octave (500–2500 Hz)

TRANSMITTER

• Audio harmonic distortion 3% typ. (With 1 kHz AF 40% deviation)

• FM hum and noise

(without CCITT filter)

• Residual modulation

(with CCITT filter)

• Limiting charact of modulation 70–100% of maximum deviation

• Microphone impedance 600

Stand-by 250 mA

RX

Max.audio 700 mA

TX

at 25 W 5.0 A

at 50 W* 10.0 A

[25 W ver.]

[50 W ver.]

[25 W ver.] 0.8 kg (1.8 Ib)

[50 W ver.] 1.1 kg (2.4 Ib) –

[50 W ver.] 50 W (High), 25 W (Low2), 5.0 W (Low1) –

Middle – ±4.0 kHz

Narrow ±2.5 kHz

Middle – 70 dB min.

Narrow 60 dB min.

Wide More than 40 dB (46 dB typ.) –

Narrow More than 34 dB (40 dB typ.) –

Wide – More than 45 dB (55 dB typ.)

Middle – More than 43 dB (53 dB typ.)

Narrow – More than 40 dB (50 dB typ.)

150 (W) × 40 (H) × 117.5 (D) mm; 5.9 (W) × 1.6 (H) × 4.6 (D) in

150 (W) × 40 (H) × 167.5 (D) mm;

5.9 (W) × 1.6 (H) × 6.6 (D) in

*; 50 W version only.

50 Ω (Nominal)

–

–

Ω

1 - 1

[USA], [EXP] [EUR]

• Receive system Double-conversion superheterodyne

• Intermediate frequencies 1st IF; 46.35 MHz, 2nd IF; 450 kHz

• Sensitivity 0.25 μV typ. at 12 dB SINAD −4 dBμV (EMF) typ. at 20 dB SINAD

• Squelch sensitivity (At threshold) 0.25 μV typ. −4 dBμV (EMF) typ.

• Adjacent channel

selectivity

Wide More than 70 dB (75 dB typ.)

Middle − More than 70 dB (75 dB typ.)

Narrow More than 60 dB (65 dB typ.)

• Spurious response 70 dB min.

• Intermodulation More than 70 dB (75 dB typ.) More than 65 dB (67 dB typ.)

RECEIVER

• FM hum and noise

(Without CCITT filter)

• Residual modulation

(With CCITT filter)

Wide More than 40 dB (45 dB typ.) –

Narrow More than 34 dB (40 dB typ.) –

Wide – More than 45 dB (55 dB typ.)

Middle – More than 43 dB (53 dB typ.)

Narrow – More than 40 dB (50 dB typ.)

• Audio output power 4.0 W typ. at 5% distortion with a 4 Ω load

• Audio output impedance 4

Measurements made in accordance with TIA-603 ([USA], [EXP]) or EN 300 086 ([EUR]).

All stated specifi cations are subject to change without notice or obligation.

Ω

1 - 2

SECTION 2. INSIDE VIEWS

• FRONT UNIT

TX/RX INDICATOR LED DRIVERS
(Q13 and Q14)

CPU
(IC1)

CLOCK FREQUENCY

SHIFT DIODE

(D6)

CPU CLOCK

(X1)

KEY BACKLIGHT DRIVER

(Q1)

KEY BACKLIGHT SW

(Q2)

RESET IC
(IC2)

EEPROM
(IC3)

TONE FILTER SWITCH
(Q3)

TONE FILTER
(IC5)

2 - 1

• MAIN-A UNIT
(TOP VIEW)

+8V LINE REGULATOR

(IC9)

VCC LINE SWITCH

(Q23)

R8 LINE REGULATOR

(Q30)

1ST IF FILTER

(FI1)

APC AMP

(IC2)

2ND IF FILTER

BANDWIDTH SWITCH

(Q40)

CPU5 LINE REGULATOR
(IC10)

RIPPLE FILTER
(Q17)

VCO SWITCH
(Q15)

PLL IC
(IC4)

IF DEMODULATOR IC
(IC1)

AF AMP
(IC21)

TONE FILETR
(Q39)

2 - 2

• MAIN-A UNIT
(BOTTOM VIEW)

AF MUTE SW

(Q35)

MODULATION LINE SW

(Q31)

VCO

REFERENCE OSCILLATOR

MODULATION BUFFER

(IC19)

REFERENCE FREQUENCY

OSCILLATOR (X2)

D/A CONVERTER

(IC20)

+5V LINE REGULATOR
(Q27)

T8 LINE REGULATOR
(Q25)

DRIVE AMP
(Q9)

1ST MIXER
(Q3)

EXPANDER

(IC17)

D/A CONVERTER

(IC18)

AF LINE SW

(IC14)

AF AMP

(IC15)

AF/TONE FILTER
(IC16)

2ND IF FILTER
(For wide mode)
(FI2)

2ND IF FILTER
(For narrow mode)
(FI6)

RF AMP
(Q2)

2 - 3

SECTION 3. DISASSEMBLY INSTRUCTION

1) Remove 4 screws from the bottom cover, and then
remove it.

2) Disconnect the fl at cable and speaker cable.

3) Remove 2 screws from the both sides, and then remove
the front panel in the direction of the arrow.

BOTTOM COVER

FLAT

CABLE

SCREW×4

5) Unsolder total of 9 points; 3 points at the antenna
connector, 6 points at the PA module.

UNSOLDER

Solder
remover

PCB

6) Remove the PCB from the CHASSIS.

FRONT PANEL

4) Remove 9 screws from the PCB.

SCREW×9

PCB

SCREW×2

PCB

SPEAKER

CABLE

CHASSIS

3 - 1

SECTION 4 OPTIONAL PRODUCTS INSTALLATION

Install optional OPC-1939/OPC-2078 as follows:

1)

Turn OFF the power, and then disconnect the DC power cable.

2) Remove 4 screws, and then remove the bottom cover.

3) Install the cable as shown.

OPC-1939/OPC-2078

Cut off the bushing as in the illustration.

4) Cut or short the patterns as below. (For AF output)

K

I

Install optional UT-108R as follows:

1) Turn OFF the power, and then disconnect the DC cable.

2) Remove 4 screws, and then remove the bottom cover.

3) Install the unit as shown.

4) Recover the bottom cover, screws and DC power cable.

Install optional UT-109R or UT-110R as follows:

1) Turn OFF the power, and then disconnect the DC power
cable.

2) Remove 4 screws, and then remove the bottom cover.

3) Cut the pattern on the PCB at "MIC" and "DISC" as
showon.

4) Install the unit as shown.

5) Recover the bottom cover, screws and DC power cable.

5) Short the pattern as below. (For modulation input)

DISC

D

MIC

6) Recover the bottom cover, screws and DC power cable.

NOTE: Be sure to recover the patterns when you remove the optional product. Otherwise no TX modulation or AF output is available.

Solder
remover

4 - 1

SECTION 5. CIRCUIT DESCRIPTION

5-1 RECEIVER CIRCUITS

RF CIRCUITS (MAIN-A UNIT)

RF signal from the antenna is passed through the LPF (as
the harmonic filter for transmitting) and antenna SW, and
then applied to the RX BPF circuit.

The applied RX signal is passed through the 2-staged tuned
BPF (D4, D8) to remove unwanted out-of-band signals, and
amplified by the low-noise RF AMP (Q2), and then applied
to the 1st mixer (Q3) through another 2-staged tuned BPF
(D9, 10).

Total of 4 stage BPFs are tuned to the RX frequency by the
tuning voltage “T1” and “T2” from the D/A converter (IC20),
to obtain required IMD characteristic.

• RF CIRCUITS

136-174 MHz

D2,D3,D5,
D6,D47,D48

D9_B

BPF

ANT
SW

RSSI

D9_A

BPF

Tuning voltage “T2”

Q1

Q2

From the TX AMP

To 1st IF circuits

1ST IF CIRCUITS (MAIN-A UNIT)

The RX signal from the BPF is mixed with the 1st LO signal
to be converted into the 46.35 MHz 1st IF signal.

The 1st LO signal is generated by the RX VCO (Q14, D33,
D34, L26, L39, etc.), and passed through the LO SW (D15)
and attenuator, and then applied to the 1st mixer (Q3)

D1,D11,D12

PWR
DET

AGC

D4

RF

BPF

AMP

Tuning voltage “T1”

LPFLPF

D8

BPF

2ND IF AND DEMODULATOR CIRCUITS (MAIN-A UNIT)

The amplified 1st IF signal is mixed with the 2nd LO signal
at the internal 2nd IF mixer of the IF demodulator IC (IC1),
to obtain the 450 kHz 2nd IF signal.

The 15.3 MHz signal generated by the reference oscillator
(X2) is passed through the filter AMP (Q34, L33, 35, C305–

308) to extract the 45.9 MHz 3rd harmonic component.

The 45.9 MHz signal is then applied to the pin 2 of IF
demodulator IC (IC1) as the 2nd LO signal.

The converted 2nd IF signal is output from the pin 3 of IF
demodulator IC (IC1), and filtered by the ceramic filters
(FI2 and FI6 for Narrow mode; FI2 only for Wide mode) to
remove unwanted out-of-band signals, and then applied to
the internal frequency-demodulator of IF demodulator IC
(IC1) from pin 5.

The demodulator is a quadrature type which uses X1 as the
phase shifter.

The frequency-demodulated AF signal is output from pin 9 to
AF circuits.

• 2ND IF AND DEMODULATORCIRCUITS

X2

REF

15.3MHz

X3

Q34

BPF

D/A

IC18

AK2330

IC1

45.9MHz

SQIN

DISC

To the AF circuits

IF IC

Q5

NWC

W/N

SW

D66,D67

W/N

X1

NWC

SW

FI6

CERAMIC

BPF

FI2

450kHz

CERAMIC

BPF

W/N
SW

Q40

D64,D65

From 1st IF circuits

The converted 1st IF signal is filtered by the crystal filter (FI1)
and amplified by the 1st IF AMP (Q4), then applied to the IF
demodulator IC (IC1).

• 1ST IF CIRCUITS

To IF IC

1st LO signals
(182.35 MHz-220.35 MHz)

Q4

FI1

XTAL

IF

BPF

AMP

46.35 MHz

D15

LO
SW

LPF

1st mixer

Q3

From RF circuits

5 - 1

AF CIRCUITS (MAIN-A UNIT)

The demodulated AF signal from the IF demodulator IC (IC1)
is amplified by the AMP (IC21), filtered by the HPF (IC16),
and then passed through the AF line SW (IC14) and LPF
(IC16). The filtered AF signal is adjusted in level (=loudness)
by the D/A converter (IC18), and applied to the AF AMP
(IC15) through the AF line SW (IC14).

SIGNALING (DECODING) (MAIN-A UNIT)

Demodulated signal from the pin 9 of the IF demodulator
IC (IC1) is passed through the LPF to extract tone signals
contained in the demodulated signal.

2/5 tone signal is extracted by the LPF (IC16). CTCSS/
DTCS signals are extracted by the LPF (Q39).

The amplified AF signal is applied to the AF power AMP (IC8)
and power-amplified to obtain AF output level.

The power-amplified AF signal is output from the external
speaker jack (J4) on the rear panel, or applied to the
internal speaker on the FRONT UNIT, through the external
speaker jack (J4).

• RX AF CIRCUITS

IC16

LPF

SW

TMONI

From the IF IC

IC21

AMP

IC16

DISC

HPF

IC16

DISC

DISC

LPF

(2/5 TONE signals)

Q39

LPF

(TCSS/DTCS signals)

RXAF

D/A

IC18

SDEC

CDEC

IC14

ANALOG

VRAF

To the CPU (FRONT UNIT: IC1)

These extracted tone signal is applied to the CPU (FRONT
UNIT: IC1) for decoding.

IC15
AF
AMP

AF ON

AF

MUTE

Q35,36,D29

AF
POWER
AMP

IC8

J4

Ext. speaker jack

FRONT UNIT

Int. speaker

5 - 2