IC-F21
Icom original Counterfeit

1.Icom logo

The shape of the counterfeit's Icom logo is different from the one of the Icom original.

2.Serial number

The counterfeit does not have serial number.
Battery Pack Icom original

Counterfeit

3.Icom logo
Counterfeit does not have Icom logo on it.

4.Product number

Icom original BP-208 is alkaline battery case, not Ni-Cd 1100mAh battery pack like counterfeit's.

Dimensions (Projections not included) Weight RF output power (at 7.2 V DC) Modulation system Max. permissible deviation

TRANSMITTER

External mic.connector Frequency error Spurious emissions Adjacent channel power Audio harmonics distortion FM Hum and noise Residual modulation Limiting charact of modulator Receive system Intermediate frequencies Sensitivity
1.5 kHz 0.25 W <= 1 GHz, 1.00 W > 1 GHz
70 dB* (25 kHz), 60 dB*1 (12.5 kHz) 3 % typical at 1 kHz, 40 % deviation 46 dB typ. (25 kHz), 40 dB typ. (12.5 kHz) 5 % typical at 1 kHz 60 % deviation 45 dB typ. (25 kHz), 43 dB typ. (12.5 kHz) 70 % 100 % of max. deviation Double-conversion super heterodyne 1st: 46.350 MHz, 2nd: 450 kHz 0.25 V (typical) for 12 dB SINAD 0.25 V (typical) for 12 dB SINAD 0.63 V EMF (typical) for 20 dB SINAD (C: 26.5 dBV/m for 20 dB SINAD)

RECEIVER

Audio output power (at 7.2 V) Adjacent channel selectivity Spurious response Intermodulation FM Hum and noise (Typical) Squelch sensitivity
0.5 W at 5 % distortion with an 8 load, 0.6 W at 5 % distortion with 6 load 70 dB typ. (25 kHz), 65 dB typ. (12.5 kHz) 70 dB (25 kHz), 60 dB (12.5 kHz) 81.29 dBV/m
70 dB*1 (C: 91.29 dBV/m) 70 dB 46 dB*2 (25 kHz), 40 dB*2 (12.5 kHz) 65 dB (C: 86.29 dBV/m) 45 dB typ.*3 (25 kHz), 43 dB typ.*3 (12.5 kHz)
0.3 V typical at threshold (C: 26.5 dBV/m at threshold)
* EIA-152-C/204D or TIA-603 is typical value, * EIA-152-C/204D only, *3With CCITT filter
A: [F21BR], B: [F21GM]], C: [F22SR]
All stated specifications are subject to change without notice or obligation.

SECTION 2

MAIN UNIT

INSIDE VIEWS

TOP VIEW

BOTTOM VIEW

Antenna switching circuit D1: 1SV307 D9, D10: MA77
RF amplifier (Q15: 3SK293) Power amplifier (Q1: 2SK2974) Pre-drive (Q2 : 2SK2973) YGR amplifier APC (IC2: TA75S01F) AF amplifier (IC4: TA7368F) Analog switch (IC6: BU4066BCFV) D/A converter (IC9: M62363FP-650C) Crystal filter (FI1: FL-335) FM IF IC (IC3: TA31136FN) 1st mixer (Q19: 2SB1132 R) PLL IC (IC1: MB15A02PFV-1)
(Q3: 2SC3585 R44) Q4: 2SC5107 O
TX/RX switch (D3, D4: MA77)
VCO circuit PLL reference oscillator (X1: CR-671A)
Low-pass filter circuit (IC12,16: NJM12904V) Expander IC (IC15: BU4094BCFV)
CPU IC7: HD6433664A24FP (F21/F21S/F21BR/ F21GM/F22/F22S) : HD64F3664FP (F22SR) EEPROM (IC11: HN58X2416TI)

SECTION 3

REMOVING THE CHASSIS

DISASSEMBLY INSTRUCTIONS

Unscrew 1 nut, A, and remove 2 knobs, B, C. Unscrew 2 screws, D. Unscrew 2 screws, H, to separate the Jack panel and the Front panel. Take off the chassis in the direction of the arrow. Unplug J6 to separate the front panel and the chassis.

Chassis

D (Black, 2mm) x 2

C J6 (Speaker connector)

Jack panel Front panel

H (Black, 2mm) x 2

REMOVING THE MAIN UNIT
Remove the searing rubber. Unsolder 2 points, E, and unscrew 2 nuts, F. Unscrew 9 screws, G, (silver, 2mm) to separate the chassis and the MAIN unit. Take off the MAIN unit in the direction of the arrow.
G ([F21S], [F21BR], [F22S] only)

Side plate G G E

F Sealing rubber Chassis MAIN unit Guide holes

SECTION 4

CIRCUIT DESCRIPTION
The signals from the RF circuit are mixed at the 1st mixer (Q16) with a 1st LO signal (393.65423.65 MHz) coming from the VCO circuit to produce a 46.35 MHz 1st IF signal. The 1st IF signal is applied to a crystal filter (FI1) to suppress out-of-band signals. The filtered 1st IF signal is applied to the IF amplifier (Q17), then applied to the 2nd mixer circuit (IC3, pin 16).

4-1 RECEIVER CIRCUITS

4-1-1 ANTENNA SWITCHING CIRCUIT
The antenna switching circuit functions as a low-pass filter while receiving. However, its impedance becomes very high while D9 and D10 are turned ON. Thus transmit signals are blocked from entering the receiver circuits. The antenna switching circuit employs a 4 type diode switching system. Received signals are passed through the low-pass filter (L1, L2, C3, C5, C6). The filtered signals are applied to the 4 type antenna switching circuit (D9, D10). The passed signals are then applied to the RF amplifier circuit.
4-1-4 2ND IF AND DEMODULATOR CIRCUITS
The 2nd mixer circuit converts the 1st IF signal into a 2nd IF signal. A double conversion superheterodyne system (which converts receive signals twice) improves the image rejection ratio and obtains stable receiver gain. The 1st IF signal from the IF amplifier is applied to the 2nd mixer section of the FM IF IC (IC3, pin 16), and is mixed with the 2nd LO signal to be converted into a 450 kHz 2nd IF signal. The FM IF IC contains the 2nd mixer, limiter amplifier, quadrature detector and active filter circuits. A 2nd LO signal (45.9 MHz) is produced at the PLL circuit by tripling its reference frequency. The 2nd IF signal from the 2nd mixer (IC3, pin 3) passes through a ceramic filter (FI2) to remove unwanted heterodyned frequencies. It is then amplified at the limiter amplifier (IC3, pin 5) and applied to the quadrature detector (IC3, pins 10, 11) to demodulate the 2nd IF signal into AF signals.

4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS
The signal from the VCO circuit passes through the T/R switching circuit (D3) and is amplified at the YGR (Q4, Q3), pre-drive (Q2) and power amplifier (Q1) to obtain 4 W of RF power (at 7.2 V DC). The amplified signal passes through the antenna switching circuit (D1) via the power detector (D2), and low-pass filter and is then applied to the antenna connector. The bias current of the pre-drive (Q2) and the power amplifier (Q1) is controlled by the APC circuit.

4-2-5 APC CIRCUIT

The APC circuit (IC2) protects the drive and the power amplifiers from excessive current drive, and selects HIGH or LOW output power. The signal output from the power detector circuit (D2) is applied to the differential amplifier (IC2, pin 3), and the T4 signal from the expander (IC9, pin 11), controlled by the CPU (IC7), is applied to the other input for reference. When the driving current is increased, input voltage of the differential amplifier (pin 3) will be increased. In such cases, the differential amplifier output voltage (pin 4) is decreased to reduce the driving current.

4-2 TRANSMITTER CIRCUITS

4-2-1 MICROPHONE AMPLIFIER CIRCUIT
The microphone amplifier circuit amplifies audio signals with +6 dB/octave pre-emphasis characteristics from the microphone to a level needed for the modulation circuit. The AF signals from the microphone are applied to the microphone amplifier circuit (IC5c, pin 10) after being pass through the high-pass filter (C186, C187). The amplified AF signals are passed through the low-pass filter circuit (IC5d, pins 13, 14) via the mute switch (IC6, pins 2, 3, 4). The filtered AF signals are applied to the modulator circuit after being passed through the mute switch (IC6, pins 8, 9, 10).

AF CIRCUIT

AF amp. SP IC4 AF VOL. R1 SW-A/SW-B unit 1 Analog 2, 3 switch 9, 10 IC6 LPF IC5D 11

IC5B HPF

"DET" signal from IC3, pin 9 "NWC" signal from IC15, pin 14

APC CIRCUIT

VCC RF signal from PLL S5V APC control circuit T5V Q14 T4 + 4-2 IC2 Q2 Pre-driver amp. Q1 Power amp. D2 Power detector circuit (D2) D1 ANT SW

to antenna

4-3 PLL CIRCUIT

4-3-1 GENERAL

A PLL circuit provides stable oscillation of the transmit frequency and receive 1st LO frequency. The PLL output compares the phase of the divided VCO frequency to the reference frequency. The PLL output frequency is controlled by a crystal oscillator and the divided ratio (N-data) of a programmable divider. The PLL circuit, using a one chip PLL IC (IC1), directly generates the transmit frequency and divided ratio based on serial data from the CPU and compares the phases of VCO signals with the reference oscillator frequency. The PLL IC detects the out-of-step phase and output from pin 5.The reference frequency (15.3 MHz) is oscillated by X1.

The pulse-type signal is converted into DC voltage (lock voltage) at the loop filter (R40R42, C74C77), and then applied to varactor diodes (D5) of the RX-VCO to stabilize the oscillated frequency. The lock voltage is also used for the receiver circuit for the bandpass filter center frequency. The lock voltage from the loop filter is amplified at the buffer amplifier (Q13) and then applied to the CPU (IC7, pin 60). The signal is analyzed at the CPU, and then applied to the D/A convertor (IC9). The D/A convertor outputs T1, T2, T3, T4 signals to RF bandpass filters D12D15 to suppress harmonic components.

4-3-4 VCO CIRCUIT

The VCO outputs from Q11 (TX) and Q10 (RX) are buffer amplified at Q7 and Q6, and are then sent to the T/R switch (D3, D4). The receive LO signal is applied to the 1st mixer circuit (Q16) through an attenuator, and the tramsmit signal is applied to the YGR amplifier (Q4). A portion of the VCO output is reapplied to the PLL IC (IC1, pin 8) via the buffer amplifier (Q6) and low-pass filter (L18, R53, C89C91).

4-3-2 TX LOOP

The generated signal at the TX-VCO (Q11, D7) enters the PLL IC (IC1, pin 8) and is divided at the programmable divider section and is then applied to the phase detector section. The phase detector compares the input signal with a reference frequency, and then outputs the out-of-phase signal (pulse-type signal) from pin 5. The pulse-type signal is converted into DC voltage (lock voltage) at the loop filter (R40R42, C75C77), and then applied to varactor diodes (D6) of the TX-VCO to stabilize the oscillated frequency.

4-3-3 RX LOOP

The generated signal at the RX-VCO (Q10, D5) enters the PLL IC (IC1, pin 8) and is divided at the programmable divider section and is then applied to the phase detector section. The phase detector compares the input signal with a reference frequency, and then outputs the out-of-phase signal (pulse-type signal) from pin 5.

PLL CIRCUIT

TX VCO Buffer Q11, D7 Q7 RX VCO Loop filter 5

Buffer Q5

D3 to transmitter circuit to 1st mixer circuit D4
Buffer Q6 Q10, D5 IC1 (PLL IC) Phase detector Crystal oscillator Programmable counter Prescaler P.STB CK DATA LPF
45.9 MHz signal Q18 to the FM IF IC 3 X1 15.2 MHz

Programmable divider

Shift register
4-4 POWER SUPPLY CIRCUITS

VOLTAGE LINE

LINE HV VCC DESCRIPTION The voltage from the attached battery pack. The same voltage as the HV line (battery voltage) which is controlled by the power swtich ([VOL] control). Common 5 V converted from the VCC line by the +5 regulator circuit (IC10). The output voltage is applied to the CPU (IC7), reset circuit (IC8) and etc. 5 V for transmitter circuits regulated by the T5 regulator circuit (Q27). 5 V for receiver circuits regulated by the R5 regulator circuit (Q26). Common 5 V converted from the VCC line by the S5 regulator circuit (Q24, Q19). The same voltage as the CPU5V line for the analog swtich (IC6), buffer amplifier (Q13), etc.

SECTION 5 ADJUSTMENT PROCEDURES

5-1 PREPARATION

When you adjust the contents on page 5-5 or 5-6, SOFTWARE ADJUSTMENT, the optional CS-F21 ADJ ADJUSTMENT SOFTWARE (Rev. 1.0 or later), OPC-478 CLONING CABLE and a JIG CABLE (see illustration at page 5-2) are required.
s REQUIRED TEST EQUIPMENT
EQUIPMENT DC power supply GRADE AND RANGE Output voltage Current capacity Measuring range Frequency range Impedance SWR : 7.2 V DC : 5 A or more : : : : 110 W 300600 MHz 50 Less than 1.2 : 1 EQUIPMENT Audio generator Attenuator Standard signal generator (SSG) DC voltmeter Oscilloscope GRADE AND RANGE Frequency range Output level Power attenuation Capacity Frequency range Output level Input impedance Frequency range Measuring range Measuring range : 3003000 Hz : 1500 mV : 40 or 50 dB : 10 W or more : 120600 MHz : 0.1 V32 mV (127 to 17 dBm) : 50 k/V DC or better : DC20 MHz : 0.0120 V : 10 mV10 V
RF power meter (terminated type)

Frequency counter

Frequency range : 0.1600 MHz Frequency accuracy : 1 ppm or better Sensitivity : 100 mV or better Frequency range Measuring range Input impedance : DC600 MHz : 0 to 5 kHz
FM deviation meter Digital multimeter
: 10 M/V DC or better AC millivoltmeter

s SYSTEM REQUIREMENTS

IBM PC compatible computer with an RS -232C serial port (38400 bps or faster) Microsoft Windows 95 or Windows 98 Intel i486DX processor or faster (Pentium 100 MHz or faster recommended) At least 16 MB RAM and 10 MB of hard disk space 640480 pixel display (800600 pixel display recommended)
s STARTING SOFTWARE ADJUSTMENT
q Connect the transceiver and PC with the optional OPC478 and the JIG cable. w Boot up Windows, and turn the transceiver power ON. e Click the program group CS-F21 ADJ in the Programs folder of the [Start] menu, then CS-21G ADJs window is appeared. r Click Connect on the CS-F21s window, then appears the transceivers up-to-date condition. t Set or modify adjustment data as desired.
s ADJUSTMENT SOFTWARE INSTALLATION
q Boot up Windows. - Quit all applications when Windows is running. w Insert the cloning software CD-ROM into the appropriate CD-ROM drive. e Select Run from the [Start] menu. r Type the setup program name using the full path name, then push the [Enter] key. (For example; D:\ setup) t Follow the prompts. y Program group CS-F21 appears in the Programs folder of the [Start] menu. IBM is a registered trademark of International Bussiness Machines Corporation in the U.S.A. and other countries. Microsoft and Windows are registered trademarks of Microsoft Corporation in the U.S.A. and other countries. Screen shots produced with permission from Microsoft Corporation. All other products or brands are registered trademarks or trademarks of their respective holders.

SCREEN DISPLAY EXAMPLE

CS-F21 ADJ Rev.1.0 File Option COM 1: OPEN 5 [A / D] VIN TEMPS LVIN SD REMOT BDET [D / A] BPF T1 : BPF T2 : BPF T3 : T4/POW : REF : DTCS BL. : Dev : SQL Lev : Connect Reload (F5) Disp para

: : : : : :

14 255

C5h BEh 62h 00h 0Eh FFh

7.73 V 32.23 C 1.92 V 0.00 V 0.27 V 5.00 V

45 150

: : : : : : : :
5Ah 2Dh 4Ch 3Ch 70h 8Dh 2Dh 96h
: 1.76 V : 0.88 V : 1.49 V : 1.18 V : 2.20 V : 55.29 : 0.88 V : 58.96
CH No. Power (Hi) Power (L2) Power (L1) DTCS BAL MOD W MOD N SQL BPF ALL BPF T1 BPF T2 BPF T3 BPF T4 TXF
: 01 (RX Freq = 216.050, TX Freq = < : 98 [ # # # # # # # # ] : 54 [ # # # # ] : 255 [ # # # # # # # # # # # # # # # # # # # ] : 132 [ # # # # # # # # # # ] : 92 [ # # # # # # # ] : 50 [ # # # # ] : 85 [ # # # # # # # ] : [Enter] to sweep : 23 [ # # # # # # # # # # # # ] : 22 [ # # # # # # # # ] : 9 [########### ] : 7 [######### ] : [Enter] to start

RF Power: High

[Enter] [Enter] [Enter] [Enter]

to to to to

sweep sweep sweep sweep 14
NOTE: The above values for settings are example only.
Each transceiver has its own specific values for each setting.
: Transceivers connection state : Reload adjustment data : Receive sensitivity measurement : Connected DC voltage : PLL lock voltage : Operating channel select : RF output power
: DTCS wave balance : FM deviation : Squelch level : Receive sensitivity (automatically) : Receive sensitivity (manually) : Reference frequency : Adjustment items

JIG CABLE

( + SP) ( ( 3-conductor 3.5(d) mm plug SPE) GND)

to IC-F4GT/GS [SP] jack

JIG cable ( + CLONE)

OPC-478

CONNECTION Standard signal generator to the antenna connector 0.1 V to 32 mV ( 127 dBm to 17 dBm)

to [MIC]

Audio generator

CAUTION:

DO NOT transmit while an SSG is connected to the antenna connector. FM deviation meter Attenuator 40 dB or 50 dB RF power meter 0.W/50 Frequency counter
to [SP] to an RS-232C port OPC-478 Personal computer

DB9 female plug

(incl. level converter circuit)

SINAD meter

NOTE: In case of IC-F22SR, instead of connecting
the Standard Signal Generator, RF power meter, etc to the antenna connector, connect to the J7 as shown below.

JIG cable

Speaker (8
DC POWER CABLE CONNECTIONS
IC-F22SR ANTENNA CONNECT POINT
+ DC POWER SUPPLY Signal terminal

GND terminals

GND Battery type detector
NOTE: When you adjust the output power (high
power), the battery type detector must be connected to GND (see illustration at above). Ohterwise the transceiver does not transmit high power, the output power will be low.
NOTE: When adjusting SOFTWARE ADJUSTMENT of IC-F22SR, connect the Standard Signal generator, RF power meter, etc to the J7 (See illustration at above).

5-2 PLL ADJUSTMENT

MEASUREMENT ADJUSTMENT PLL LOCK VOLTAGE ADJUSTMENT CONDITIONS UNIT LOCATION 1.3 V AC 1.8 V D VALUE UNIT ADJUST MAIN C54 ADJUSTMENT

CONVENIENT: The BPF T1BPF T4 can be adjusted automatically.
q-1: Set the cursol to BPF ALL on the adjustment program and then push [ENTER] key. q-2: The connected PC tunes BPF T1BPF T4 to peak levels. or w-1: Set the cursol to one of BPF T1, T2, T3, or T4 as desired. w-2: Push [ENTER] key to start tuning. w-3: Repeat w-1 and w-2 to perform additional BPF tuning. SQUELCH LEVEL [SQL] 1 Operating frequency: Top Connect a SINAD meter with an 455.000 MHz A panel 8 load to the [SP] jack. 466.050 MHz B 465.138 MHz C 446.09375 MHz D Channel spacing : Narrow Connect a standard signal generator to the antenna connector* and set as: Frequency : 455.000 MHz A 466.050 MHz B 465.138 MHz C 446.09375 MHz D Level : 0.2 V* (121 dBm) Modulation : 1 kHz Deviation : 1.75 kHz Receiving Receiving 12 dB SINAD
At the point where the audio signals just appears.
*The output level of the standard signal generator (SSG) is indicated as the SSGs open circuit. *1In case of IC-F22SR, instead of the antenna connector, connect to the J7 as shown page 5-3.

SECTION 6

REF NO.

PARTS LIST

[MAIN UNIT]
[SW-A UNIT] ([F21], [F21GM], [F22] AND [F22SR])

ORDER NO. DESCRIPTION

ORDER NO.

1110005330 S.IC

DESCRIPTION

NJM12904V-TE1

1590003020 S.TRANSISTOR XP4216-(TX)

R1 R2 R3

7210003060 VARIABLE 7030003380 S.RESISTOR 7030003410 S.RESISTOR
TP76N00N-15F-10KA-2251 ERJ3GEYJ 331 V (330 ) ERJ3GEYJ 561 V (560 )

5210000710 S.FUSE

KAB NA29

5040002070 S.LED

LNJ107W5PRW

2250000450 ENCODER

TP70QF4161-16F-2458A
0910053673 PCB 0910054163 PCB

B 5603C B 5603C

[F21], [F21GM] [F22], [F22SR]
[SW-B UNIT] ([F21BR], [F21S] AND [F22S])
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 Q25 Q26 Q27 Q28 Q29 Q30 Q31 Q32 Q33

1560000840

S.FET S.FET S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.FET S.TRANSISTOR S.FET S.FET S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.FET
2SK2974 2SK2973 (MTS101P) 2SC3585 R44-T2B 2SC5107-O (TE85R) 2SC5107-O (TE85R) 2SC5107-O (TE85R) 2SC5107-O (TE85R) DTC144EUA T106 XP1214 (TX) 2SC5085-Y (TE85R) 2SC5085-Y (TE85R) XP6501-(TX).AB 2SK880-Y (TE85R) DTA144EUA T106 3SK293 (TE85L) 3SK272-(TX) 2SC4215-O (TE85R) 2SC4116-GR (TE85R) 2SB1132 T100 R XP6501-(TX).AB DTC144EUA T106 UN911H (TX) DTA144EUA T106 2SB1132 T100 R XP6501-(TX).AB 2SA1577 T107 Q 2SA1577 T107 Q DTC144EUA T106 2SC4116-GR (TE85R) XP1213 (TX) 2SC4215-O (TE85R) DTC144TU T107 2SK1829 (TE85R)

R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56

7030003480 7030003560

S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.ARRAY S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR
ERJ3GEYJ 823 V ERJ3GEYJ 101 V ERJ3GEYJ 153 V ERJ3GEYJ 102 V ERJ3GEYJ 100 V ERJ3GEYJ 470 V ERJ3GEYJ 333 V ERJ3GEYJ 472 V ERJ3GEYJ 470 V ERJ3GEYJ 101 V ERJ3GEYJ 333 V ERJ3GEYJ 472 V ERJ3GEYJ 100 V ERJ3GEYJ 123 V ERJ3GEYJ 221 V ERJ3GEYJ 102 V ERJ3GEYJ 563 V ERJ3GEYJ 103 V ERJ3GEYJ 101 V ERJ3GEYJ 472 V ERJ3GEYJ 101 V ERJ3GEYJ 473 V ERJ3GEYJ 330 V ERJ3GEYJ 221 V ERJ3GEYJ 683 V ERJ3GEYJ 101 V ERJ3GEYJ 331 V ERJ3GEYJ 683 V ERJ3GEYJ 103 V ERJ3GEYJ 272 V ERJ3GEYJ 332 V ERJ3GEYJ 331 V ERJ3GEYJ 332 V ERJ3GEYJ 332 V ERJ3GEYJ 221 V ERJ3GEYJ 124 V ERJ3GEYJ 104 V ERJ3GEYJ 183 V ERJ3GEYJ 104 V ERJ3GEYJ 223 V ERJ3GEYJ 104 V ERJ3GEYJ 682 V ERJ3GEYJ 392 V ERJ3GEYJ 102 V ERJ3GEYJ 473 V ERJ3GEYJ 102 V ERJ3GEYJ 103 V ERJ3GEYJ 122 V ERJ3GEYJ 470 V ERJ3GEYJ 823 V ERJ3GEYJ 473 V ERJ3GEYJ 563 V ERJ3GEYJ 473 V EXB-V8V 102JV ERJ3GEYJ 470 V ERJ3GEYJ 103 V ERJ3GEYJ 222 V ERJ3GEYJ 103 V
(82 k) (100 ) (15 k) (1 k) (10 ) (47 ) (33 k) (4.7 k) (47 ) (100 ) (33 k) (4.7 k) (10 ) (12 k) (220 ) (1 k) (56 k) (10 k) (100 ) (4.7 k) (100 ) (47 k) (33 ) (220 ) (68 k) (100 ) (330 ) (68 k) (10 k) (2.7 k) (3.3 k) (330 ) (3.3 k) (3.3 k) (220 ) (120 k) (100 k) (18 k) (100 k) (22 k) (100 k) (6.8 k) (3.9 k) (1 k) (47 k) (1 k) (10 k) (1.2 k) (47 ) (82 k) (47 k) (56 k) (47 k) (47 ) (10 k) (2.2 k) (10 k)
R142 R143 R145 R146 R147 R148 R149 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R163 R164 R165 R166 R167 R168 R169 R170 R171 R172 R173 R174 R175 R176 R177 R178 R179 R180 R181 R182 R184 R185 R186 R187 R188 R189 R190 R191 R192 R193 R194 R195 R196 R197 R198 R199 R200 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227
S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.ARRAY S.ARRAY S.ARRAY S.THERMISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.ARRAY S.ARRAY S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.ARRAY S.ARRAY S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) D only ERJ3GEYJ 104 V (100 k) C only ERJ3GEYJ 104 V (100 k) EXB-V8V 102JV EXB-V8V 102JV EXB-V8V 102JV NTCCM20124AG473J-T ERJ3GEYF 104 V (100 k) ERJ3GEYF 104 V (100 k) ERJ3GEYF 104 V (100 k) ERJ3GEYJ 100 V (10 ) ERJ3GEYJ 105 V (1 M) ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 103 V (10 k) EXB-V8V 102JV EXB-V8V 102JV ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 474 V (470 k) ERJ3GEYJ 474 V (470 k) ERJ3GEYJ 474 V (470 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 222 V (2.2 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 333 V (33 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 563 V (56 k) ERJ3GEYJ 184 V (180 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 273 V (27 k) ERJ3GEYJ 154 V (150 k) ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 474 V (470 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 183 V (18 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 124 V (120 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 473 V (47 k) EXB-V4V 102JV (1 k) EXB-V8V 102JV ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 152 V (1.5 k) ERJ3GEYJ 394 V (390 k) ERJ3GEYJ 184 V (180 k) ERJ3GEYJ 823 V (82 k) ERJ3GEYJ 393 V (39 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 124 V (120 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 153 V (15 k) ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 222 V (2.2 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 184 V (180 k)

C236 C237 C238 C239 C240 C242 C243 C244 C245 C246 C247 C248 C249 C251 C252 C253 C255 C257 C258 C259 C260 C261
S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC
C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 C1608 JB 1H 223K-T-A JB 1H 102K-T-A JB 1H 102K-T-A JB 1H 102K-T-A CH 1H 470J-T-A JB 1H 272K-T-A JB 1H 562K-T-A CH 1H 181J-T-A JB 1H 822K-T-A CH 1H 680J-T-A JB 1E 104K-T-N JB 1E 104K-T-N JB 1A 474K-T-N JB 1H 102K-T-A CH 1H 101J-T-A CH 1H 090D-T-A JB 1H 102K-T-A JB 1E 104K-T-N CH 1H 470J-T-A JB 1H 103K-T-A JB 1H 102K-T-A CH 1H 470J-T-A

J1 J2 J3 J4 J5 J6 J7

6510022370
CONNECTOR CONNECTOR S.CONNECTOR CONNECTOR CONNECTOR S.CONNECTOR S.CONNECTOR
IMSA-9230B-04Z120-T F only IMSA-9230B-07Z120-T BM02B-ASRS-TF HSJ1122-010010 HSJ1456-01-220 06FLT-SM1-TB [F22SR] only IMSA-9178S-04Y901 [F22SR] only

7700002160 MICROPHON

KUC3523-040245

S1 S2 S3

2230001060 S.SWITCH 2230001060 S.SWITCH 2230001060 S.SWITCH
EVQ-PUL 02K EVQ-PUL 02K EVQ-PUL 02K

W2 W4 W8 W12 W13 W14

7030003860 7030003860
S.JUMPER S.JUMPER S.JUMPER S.JUMPER S.JUMPER S.JUMPER
ERJ3GE ERJ3GE ERJ3GE ERJ3GE ERJ3GE ERJ3GE

JPW JPW JPW JPW JPW JPW

V V V V V V

A only E only E only

EP1 EP2 EP3 EP4 EP5 EP6 EP7 EP8 EP9

6910013370 3310002940

PCB PCB S.BEAD S.BEAD S.BEAD S.BEAD S.BEAD S.BEAD S.BEAD ANTENNA
B 5601D B 5685B BLM11B221SB BLM11B221SB BLM11B221SB BLM11B221SB BLM11B221SB BLM11B221SB BLM11B221SB 2458 ANT
E only B only [F22SR] only
A: [F21], [F21BR], [F21GM], [F21S] B: [F22], [F22S], [F22SR] C: [F21BR], [F21GM], [F22SR] D: [F21], [F21S], [F22], [F22S] E: [F21BR], [F21S], [F22S] F: [F21GM], [F21], [F22], [F22SR] S.=Surface mount

SECTION 7

[CHASSIS PARTS]
REF. NO. ODER NO. SP1 MP1 MP4 MP6 MP7 MP8 MP9 MP10 MP11 MP12 MP13 MP14 MP15 MP18 MP19 MP20 MP21 MP22 MP26 MP27 MP28 MP29 MP30 MP32 MP33 MP34 MP35 MP39
MECHANICAL PARTS AND DISASSEMBLY
DESCRIPTION QTY. REF. NO. ODER NO. MP1 MP2 MP6 MP8930055690 DESCRIPTION 2336 VCO case 1923 VCO cover 2458 main shield Sponge (GT) QTY. 1 1

A A C C A C

RB706F-40 (Symbol: 3J)

HVC362 (Symbol: V2)

SECTION 9

TOP VIEW

BOARD LAYOUTS
9-1 IC-F22/F22S/F22SR MAIN UNIT

C196 R159 C194

R223 C244

R192 R190

R136 C184 R137

R188 R187

EP7 R194

R196 C228

C231 R198

R123 R121 R114

J2 to the SW-A/B units
7 GND TLED RLED VCC VOLIN VOLOUT 1 CBI0

R206 R208 C234 R209 C236

C185 R120 C175 R116 R242 R115 C174

C223 R143

C226 R94 C143

R204 R205 C233

C235 R203 C232

R122 C191

R146 C258

C35 R13

R151 R163

C40 R19 C43

L10 R20 C38

L9 C29

R50 R22 R51 C84 R23 R24 C63

C44 R25 C46 R26

C31 W14 C30

R21 C48 C51

Q2 Q10

W4 C50 R28

R32 C67

C64 C66

C53 C52 C55

C24 R5 C23 C25 R6 C17

C87 R244 C88 C192

D7 L17

D5 L14

R56 C213 R55

Q14 J3

Q25 C206

2 GND 1 SP

J4 B5685B

J3 to the speaker

C159 C158 C157 C156

J1 to the SW-A unit

4 CBI3 CBI2 CBICBI0

BOTTOM VIEW

C176 R127 R118

R130 R131 R132 R126 C180
R141 C189 R101 C202 C139 R100

C161 C162

R234 W13 R199 C248 R241

C257 C109

R125 R68 C107 C110 C114 C115 C113 C116 R71 C119 C138

R99 C154

C155 R98 C147 C153

R229 C102 C105

C123 R76

C126 C144 R82 L25

C142 C152

R154 R210 R212

R73 C118

C121 R75

C149 C151

C127 R85 R84 C128 R86

R89 C136

R90 R88

C42 C59 C91

C129 R83 C130

D9 L19
C99 C13 C14 C97 R58 R60 R61 C239
C60 C49 EP3 C62 C61 R30 R33 C90 R53 R36 C89

C216 D21

L15 C71

C92 C80 R232

R87 D22 R109 C167 C171 R107

C83 R49 R46 C81 R48

R59 C96

C76 C75

C74 C77 C73 R41

C47 R27

R43 C78

R105 R211

R37 R38 C72

C82 R47

R173 C215 R175

R174 C212

C211 R172 R171

C195 R158

D16 IC8
9-2 IC-F21/F21S/F21BR/F21GM MAIN UNIT

C196 R159 C194 C246 R156

C234 R206 R208 R209 C236

R145 R122 C191 R146 C258

C40 C43 L11 R50 R22 C84 R23 R24 C63 C44 R25 C46 R26 C41

L10 R20

R221 C38

C37 R17 C36

W2 C255

EP2 C48 C51

W14 C30

C50 W4 R28

C70 R153

B5601D

R141 C189 R101 C202 R100 C139

R185 C155 R98

R125 R68 C107 C110 C114 C115 C113 R71 C119 C138

R229 C105

C99 C97 C13 C14 R58 R60 R61 C239
C60 C49 EP3 R33 C62 C61 C90 R53 R36 C89

R47 C82

R173 C215 R175 C211 R172 R174 C212

Q26 Q27

9-3 SW-A AND SW-B UNITS

TOP VIEW SW-A UNIT

SW-B UNIT

B5603C

BOTTOM VIEW SW-A UNIT

J1 to the MAIN unit J1

CBI0 CBI1 CBI2 CBI3

J2 to the MAIN unit J2

CBI0 VOLOUT VOLIN VCC RLED TLED GND

B5604C

SECTION 10

10-1 PARTS LIST

[CHARGE UNIT]
REF. NO. ODER NO. R1 R2 J1 DS1 EP1 MP1 MPRESISTOR 7010007100 RESISTOR 6510021470 CONNECTOR 5040001390 LED 0910053820 PCB TERMINAL TERMINAL
BC-146 OPTIONAL DESKTOP CHARGER INFORMATION
10-2 DISASSEMBLY INFORMATION
DESCRIPTION ERG3SJ680H PSD1/4V 1 k HEC0470-01-230 TLG124A B 5650

QTY. 1 MP5 A MP4 A

[CHASSIS UNIT]
REF. NO. ODER NO. MP1 MP2 MP3 MP4 MP5 MP8810008660 DESCRIPTION 2447 case (A) 2447 cover Leg cushion (A) 2480 spacer 2480 BC-spacer Screw B0 M 3 x 8 NI-ZU (BT) QTY. MP1 B MP2 B
Screw abbreviations B0, BT:Self-tapping NI-ZU :Nickel-Zinc

CHARGE unit

MP3 A MP6 A MP3 A
NOTE: A :CHASSIS UNIT B :CHARGE UNIT

10 - 1

10-3 VOLTAGE DIAGRAM

C : 13.8V N : 13.8V

C : 7.2V N : 13.8V

J1 HEC0470-01-230

DS1 TLG124A

C : 9.2V N : 13.8V

10-4 BOARD LAYOUT

MP1 DS1 MP2 R1

10 - 2

SECTION 11

Q12 XP6501 S5V RIPPLE FIL Q10 2SC5085 D5 HVU350B Q8 DTC144EUA Q9 XP1214 VCO SW R5V ANT 440470MHz

MAIN UNIT

Q13 2SK880 LVIN BUFF

X1 CR-671A

IC1 MB15A02PFV1 REF 15.3MHz BAL REF Q31 2SC4215 D19 HVC362 PLL IC LOOP FIL

Q24 2SB1132 DET LPF IC12A NJM12904V RESTORATION IC12B NJM12904V Q26 2SA1577 R5V DET LPF IC5A NJM13403V SDEC Q27 2SA1577 T5V T5 REG R5 REG CDEC S5V S5 REG
Q23 DTA144EUA Q25 XP6501 S5 CONT
RMUT MMUT DUSE NWC S5C R5C T5C

SHIFT SW

BU4094BCFV

11 - 1

SECTION 12

VOLTAGE DIAGRAM

VCC T5V S5V +5V +5V RC82 0.1 Rk CP CP +5V 4.9 V Rk C84 0.001 CP D19 HVC362 X1 CR-671A Rk D21 MA2S111 LVIN F2 Rk CP PLST SO SCK UNLK OSCIN R OSCOUT P VP FOUT VCC NC FC DO LE GND DATA LD CLOCK FIN D20 MA2S8 C86 0.001 15.3 MHz 0.75 V P-P R244 22
NOTE: A: [F21], [F21BR], [F21GM] and [F21S] D: [F21], [F21S], [F22] and [F22S]

VCC T5V S5V +5V

B: [F22], [F22S] and [F22SR] E: [F21BR], [F21S] and [F22S]
C: [F21BR], [F21GM] and [F22SR] F: [F21GM], [F21], [F22] and [F22SR]

VCC T5V VCO5V

Q12 XP6501 AB
CP CC55 7P C54 6P L14 4.7 H D5 HVU350B CP L17 4.7 H C69 7P C68 3P C75 0.1 C74 0.001 D7 HVU350B D6 MA368 Rk C67 0.3 P C66 1.5 P C56 1
R29 3.3 k C52 4P LnH C50 7P C51 8P R32 3.3 k C63 5P CP C70 0.001

R28 2.7 k W4

EP2 C48 0.001

S1 F1 REF

Rk C85 2.2

Q13 2SK880 Y

R44 1k C78 0.001

Q10 2SC5085 Y

C49 0.5 P 1.8 V 0V RC62 0.5 P R33 220

Q31 2SC4215 O

CP R46 1.2 k Rk Rk

R220 2.2 k CP

C53 4P

BAL CP

R31 3.3 k

C61 CP 0.001

Q11 2SC5085 Y

C65 5P LnH

C46 470

IC1 MB15A02PFV-1

R52 1k

R42 1k C77 0.047 RC76 1

R41 3.9 k

R40 6.8 k

L15 0.68 H

Q9 XP1214

Q8 DTC144E

0V 1.7 V Rk

LOCK 4.5 V UNLOCK 0.5 V DEV W13 W12 EP7 E only E only E only J1 F only From SW-A UNIT CBI0 CBI1 CBI2 CBI3 VCC R5V S5V T5V +5V C92 0.1 +5V R5V S5V R96 1.2 k C153 0.01 Rk 0V 3.5 V L28 0.22 H

C88 0.1

C89 0.001 +5V R5V S5V

C90 6P

CP DEV +5V R5V S5V

C72 0.001

Rk C251 0.001 R5V S5V

C150 4P

C148 3P

R95 150

R94 47

0V 4.7 V

Rk C143 0.9
X2 CDBCA450CX24 R92 1.8 k
RSSI R89 1k C137 100P R0V 2.9 V C136 0.001 RC138 0.001 FI1 FL-335 C132 0.001 C133 5P R87 2.7 k CP C130 0.01 RRC128 0.001 CP CP RR84 1k L26 1.0 H 0V 4.5 V

C149 7P

L27 0.82 H

IC3 TA31136FN

FI2 ALFYM450F=k

Q18 2SC4116 GR

CP Rk Rk CP
SQLIN C159 C158 C157 C156 0.001 0.001 0.001 0.001 J2 CBI0 From/to SW-A and SW-B UNITS 7 R99 1.2 k

NC VCC NC VIN RIPPLE POUT PWGND PREGND PHASE NF

AF ON 3.4 V 6 R103 33

Rk D10 MA77 CP

IC2 TA75S01F

RC163 100

R126 1

C178 0.01

R121 6.8 k BEEP

C173 0.1

Q20 XP6501 AB

R106 3.3 k C169 6.8 C168 0.22 VOLOUT

C166 C165 C47 P 0.047

VOLIN VOLOUT AFOUT C248 0.1

VOLOUT AFOUT

BDET LVIN RSSI SDEC CDES
R4.8 V T1 T2 DAST SCK SO T3 T1 C203 0.01 Rk 24 VIN1 VINVOUT1 VOUTVOUT2 VOUTVIN2 VIN7 VDD GND 20 LD RESET CLK VDAREF 17 DI DO VIN3 VINVOUT3 VOUT14 VOUT4 VOUT5 VIN4 VINDET SQLIN DEV C202 0.001 CP
LH R151 NTCCM20124AG473JCT Rk
4.9 V CPU5V C191 0.1 R149 1k TEMP REMO Rk C192 0.49 OSC1 X3 CR-702 C199 0.001 Rk Rk CENC2 CSFT CP D16 MA77 Rk Rk CP R155 14.7456 MHz 1.1 V P-P 10 CP RES OSC2 R241 1k Rk D only R212 15k

Rk OUT VDD 3 VSS Rk CCP

IC8 S-80942ANMP-DD6
+5V 5 CD 4 NC BAL REF DEV REF BAL DET C200 0.027
NC NC PB0/AN0 PB1/AN1 PB2/AN2 PB3/AN3 PB7/AN7 PB6/AN6 PB5/AN5 PB4/AN4 P17/RQ3/TRGV P16/RQ2 P15/RQ1 P14/RQ0 NC NC

AST CK O

UNLK NOIS F2 F1

R156 1M

CPU5V X1 VCL RES TEST VSS OSC2 OSC1 VCC

S5V EP6 4.9 V

Rk C233 0.1

R203 1.5 k

CENC1 CENC0 RMUT MMUT

Q29 2SC4116 GR

C232 0.047 Rk RRk C222 0.047 CP
Rk Rk Rk C219 0.1 Rk C218 0.0082

NWC S5C R5C T5C R164 1k

Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8

STR D CLK OE

EXST SO SCK
NC NC P52/WKP2 P53/WKP3 P54/WKP4 P55/WKP5/ADTRG P10/TMOW P11 P12 P56/SDA P57/SCL P74/TMRIV P75/TMCIV P76/TMOV NC NC

R163 1k

C198 0.1
NC NC AVCC X2 X1 VCL RES TEST VSS OSC2 OSC1 VCC P50/WKP0 P51/WKP1 NC NC
IC7 HD6433664A24FP except [F22SR] HD64F3664FP [F22SR] only
NC NC P22/TXD P21/RXD P20/SCK3 P87 P86 P85 P84/FTIOD P83/FTIOC P82/FTIOB P81/FTIOA P80/FTCI NMI NC NC
CLO CLI ESDA AFON TLED RLED TXC R147 1k PTT EXST DAST PLST R148 1k Rk Rk C only J6 [F22SR] only

IC15 BU4094BCFV

Rk k C225 4.7 Rk C224 0.033
9 QS 10 QS 8 Rk 8 VCC 7 WP 6 SCL 5 SDA C216 0.01 A0 A1 A2 VSS CPU5V Rk CENC0 CENC1 CENC2 CBI2 CBI3 SCK SO SENC0 SENC1 SENC2 SENC3 Rk

0V 1.8 V

Q28 DTC144EU

DUSE DTCS 4.5 V

R200 1k Rk

R201 1k

RES CPU5V CLI CLO RLED