Cobra MR HH475 FLT BT, MR HH475 FLT ET, MR HH475 FLT EU Serivce Manual

MARINE HANDHELD TRANSCEIVER

CatalogNumber:MRHH475FLTBT/EU

CONTENTS

MRHH475FLTBT/EU

Page

Specifications........................................................................................................................................................2

Theory of Operation...............................................................................................................................................4

Block Diagram.......................................................................................................................................................7

Disassembly Instructions................................................................... ..................................................................8

Alignment Procedures...........................................................................................................................................9

Adjustment Procedure.........................................................................................................................................10

Wiring Diagram....................................................................................................................................................11

Printed Circuit Board............................................................................................................................................12

Troubleshooting..................................................................................................................................................15

Exploded View.....................................................................................................................................................16

Exploded View Part List......................................................................................................................................18

Electrical &Packing &Other Parts List..................................................................................................................20

IC Lead Identification and Internal Diagram.........................................................................................................52

Transistor Lead Identification...............................................................................................................................61

VoltageChart.......................................................................................................................................................62

Schematic Diagram.............................................................................................................................................66

Version:01Date:Mar16,2010

SPECIFICATIONS

DESCRIPTION Unit LIMIT

Frequency Range: Transmit MHz 156.025 To 157.425.

Frequency Range: Receive MHz 156.050 To 162.025 (Eu)

Number Of Channels 59 INT, 57 USA, 57 Canada

100 Memory Channels

10 Weather Channels (Us)

Oscillate Mode PLL

Modulation FM(16K0G3E)

Channel Spacing KHz 25

Frequency Stability PPM ±10

Standard Operation Temperature °C -15 To +55 (Eu), -20 To +50 (Us)

Normal Working Voltage V 7.4

Low Limit Working Voltage V 7.35

( Tx 5% / Rx 5% / Standby 90%)

Memory Resented Flash

Antenna Socket FIXED

156.050 To 163.275 (Us)

Hour 8 ( 6W @ 7.4V / 1000mAH ) Battery Lifetime

Hour 16 ( 1W @ 7.4V / 1000mAH )

Display LCD With Background Light

Built-ln Speaker Diameter 40mm / Impedance 8 Ohm

Dimension : 123 X 62 X 36 mm (not including antenna)

Weight : ( Without Battery) 228g

VHF RECEIVER

Sensitivity For 12dB Sinad dBm ≤ -100

Rated audio output@5% Thd Speaker mW ≥ 250

Deviation sens.For rated output (VR @ max.) ±kHz ≤ 2.5

Max.S/N ratio @ 1mV dB ≥ 40

Audio frequency resp.

@300HZ dB 9 ± 3

@2500HZ dB -9 ± 3

Speaker output 8Ω load @ Max Vol mW ≥ 400

Standby Current mA ≤ 50 (Eu), 68 (Us)

Receiver Current @ Max Vol. mA ≤ 200

Charging current mA 180 ± 30

TRANSMITTER

Carrier power(no mod)

Hi W 6±0.8

Mid W 3±0.5

Lo W 0.8±0.2

Carrier freq. Tolerance ppm ± 10

Modulation limiting ±kHz 4.3~ 4.9

Modulation sens.For ±3 kHz dev. mV 7±3

Audio frequency response ( 1KHz / 0dB ref )

@300HZ dB -12 ± 3

@2500HZ dB +7 ± 3

Audio distortion @ 2.5 kHz dew. % ≤ 5

Hum and noise ratio dB ≥ 35

Current drain

Transmit(High) A ≤ 2.0

Transmit(Mid) A ≤ 1.5

Transmit(Low) A ≤ 0.9

Mic Modulation Sen. ( at Sound level of 94 dBA ) ±kHz ≥ 1.5

Mic Modulation Limiting ( at Sound level of 110

±kHz 4.0 ~ 4.9

dBA )

Bluetooth part

TX Average Power dBm -6 ~ 4

Max. Drift (DH1) KHz -25 ~ 25

Max. Drift (DH3/DH5) KHz -40 ~ 40

Frequency Deviation (average) KHz 115 ~ 175

Frequency Tolerance (offset) KHz -75 ~ 75

RX Sensitivity (@ 0.1% BER) dBm ≤ -70

Weather RECEIVER (for Us)

Sensitivity For 12dB Sinad dBm ≤ -100

Sensitivity For WX Alarm ( 1050Hz Dev.3KHz ) dBm ≤ -100

Note: Nominal specifications represent the design specifications. All units should be able to approximate these

specs. Some will exceed these specs, and others may drop slightly below them. Limit specs represent the

absolute worst condition that might still be considered acceptable. A unit should never fail to meet limit specs.

THEORY OF OPERATION

This PLL - controlled VHF marine transceiver provides an accurate and stable multi-channel operation.

The transceiver consists of 8 main sections:

 Transmitter

 Receiver

 Low voltage detection

 Voice recorder

 Local oscillator PLL (Phase Lock Loop) Circuit

 Memory backup

 Bluetooth

 ATIS(Automatic Transmitter Identification System) Only for HH475Eu

 Transmitter

The audio is picked up from the internal MIC, the audio signal is then amplified by Audio Amplifier, U4

LM324 (2/4), U4 (3/4) and filtered by a low pass filter U4 (4/4). The audio is adjusted with VR2 to obtain a

suitable Audio frequency response, and then modulated with the carrier by VCO, through Varicap (D11).

The modulated signal output from the VCO is pre-amplified by Q5, Q4 and Q3. Then it is amplified by Q12,

Q6 .The amplified signal then passes through a low -pass filter network which consists of C72, L8, C66,

C15, L6, C4 filters out spurious emission, and the antenna switching circuit, D1, D2. The signal is filtered

by another low-pass filter circuit which consists of C16, L2, C62, C12, L1, C5, C1. These low pass filters

are necessary to suppress the second and third harmonics. The signal is then fed into the antenna input

and radiated out.

TX current is converted into a voltage signal, that signal fed into U2 LM2904 (2/2) for sampling. U2 is the

Automatic power control (APC) circuit.

When the unit is transmitting, the audio signal is added to the TX VCO Varicap D11. The capacitance of

D11 is varied following the audio signal and when mixed with the carrier to form the modulated signal.

 Receiver

The receiver uses a double frequency super-heterodyne circuit. The first Immediate Frequency (IF) is 21.4

MHz and the second is 450 kHz.

The RF signal is received by the antenna, and passes through a low-pass filter network C1, L1, C5, C12,

L2, C62, C16, C20, L7, C67 to filter out the unwanted signals, the antenna switching circuit D1, D2

switching circuit to receive. The received RF signal is sent to a SAW filter F1 to filter out-of-band signals.

The RF amplifier Q7 amplifies signals within the range of the frequency coverage and passes though

another saw filter F2 to further filter out-of-band signals. The RF signal then is mixed with the local

oscillation frequency by the mixer Q8. A first IF (Immediate Frequency) 21.4 MHz is produced. The IF is

passed through a pair of crystal filter F3 (1/2), F4 (2/2) to further filter other unwanted signals. The first IF

then is amplified by Q2 and the IF amplifier U1 (BA4116). U1 is a integrated RF amplifier which consists

of a local oscillator, a demodulator, a second mixer, squelch control circuit, and RF amplifier. The 21.4

MHz IF then is mixed here with second mixer and converted into 2nd Immediate Frequency (IF) 450 kHz.

The 2nd IF passes through a ceramic filter F5 to filter out the residue unwanted signal at pin 5 of U1

(BA4116) output this final IF signal and the Audio signal is output at pin 9 of U1 (BA4116).

The audio signal is fed through a volume control VR3 and finally amplified by Audio amplifier U11

(NJM2070) and heard in the speaker.

The squelch control is also controlled by U1 (BA4116). The second IF passes through U1 (BA4116)

internal squelch control R90, C141, C142 form as a squelch amplifier. The ceramic filter produces a

squelch signal (RF noise). Pin 14 of U1 sends the digital squelch control signal to the CPU mute the audio

speaker path. Pin 12 of U1 output a RSSI level to the CPU.

 Low Voltage Detection

The battery voltage, divided by R148, R149 is input to U7 Pin

11 for voltage level sample.

 Voice recorder

Voice recorder consists of U5(4/4) LM324,U9(AT4SDBD41B)and MCU U7.Voice source from AF via

U5(4/4) LM324 amplifies then pass to MCU U7 pin 13,or voice signal from MIC via U4(1/4,2/4,3/4) then

pass to MCU U14,they will be transformed to voice data up to 20 seconds, U9(AT4SDBD41B) stores these

voice data. When recorder play, the voice come out form MCU U7 Pin43. Then pass to U4(4/4), after that

pass to U11(NJM2070) to amplify the recorder voice signal.

 PLL (Phase Lock Loop) Circuit:

The receiver and transmitter both share the same PLL (Phase Lock Loop) Circuit to produce the carrier or

the receive frequency. The local oscillator consists of a fundamental frequency oscillator X1 20.95MHz and

U6 (KB8825). A phase Lock Loop (PLL) U6 (KB8825), TX VCO Q14 and RX VCO Q13. The fundamental

frequency is frequency divided by U6 and a 12.5 kHz signal is produced. When the VCO frequency

applied to and frequency divided by U6 produces a frequency comparable to 12.5 kHz, PLL will control the

VCO. When these two frequencies are matched, a constant control voltage is output from PLL to lock

VCO in desired frequency. The PLL also will output a lock indication to MCU to indicate the PLL is in

frequency lock state.

 Memory Backup

U9 is an EEPROM AT4SDB41B which acts as a memory backup for the working channel code and the

system parameters. Every time when the unit is switched on, the MCU will reset the system, clear the

RAM, and recall in the memory from the EEPROM to refresh the RAM in CPU U7.

 Bluetooth

Bluetooth circuit consists of U13(BT_MODULE)and CPU U7.When Bluetooth transmitting the voice from

U13 Pin7 and 5 input, then via U7 controls and U13 transforms to Bluetooth RF signal then radiates out by

BT-ANT; When Bluetooth receiving, Bluetooth RF signal comes from BT-ANT via U7 and U13 then

changes to voice signal from U13 Pin 4 output.

 ATIS(Automatic Transmitter Identification System) ONLY for HH475EU

ATIS circuit consists of U5(1/4),U4(4/4) and CPU U7, when receiving the AF signal from U1 Pin 9 via

U5(1/4) then pass to CPU U7 Pin 43, when transmitting AITS PWM signal form U7 Pin 45 output then via

U4(4/4) pass to TX VCO Varicap D11 then mixes with the carrier to form the modulated signal.

BLOCK DIAGRAM (for HH475)

VCC 5V

B+7.4V

LAMP

RSSI

SQL

AUDIO

SQL

VR1

U1 BA4116

R77

C142

BPF

R90

C141

IF AMPCRYSTAL BPF

F3,F4

1st MIX

SAW BPF

156-163MHz

2nd LOCAL MIXER,SQL

2SC4901

D10

F.CONT

HUV307

21.4MHz Q13

2SK302

RX VCO

3SK318

F2:HDF160B

2nd-IF DET

CBD450C24

BPF

F5 450KHz

2nd-if

20.95MHz

LPF

MOD

D12

F.CONT

HUV307

Q14

TX VCO

2SK210

2SC4901

BUFFER AMP

DAN235E

RX/TX SW

20.95MHz

PLL

CLK

DATA

KB8825

TX/RX TRANS

Q26:BT3906

Q9:BT3906

D11

HVU307

MOD

LOCK

RX SW

VTX VCO

MOD

PTT

CALL/SQL

TRI

16/9

DOWN

KEY BOARD

DATA BACKUP

CPU PART

APC

RX SW

Q24:BT3906

RX 5V

AUDIO

AF MUTE

AF SW

RX SW

VTX VCO

AF MUTE

V TXPOW

BT_AUDIO SW

V TXPOW

VCC 5V

Q25:BT3906

TX 5V

Q27

BT3904

BT REW

MEM

SCAN

H/M/L

AT4SDBD41B

SQL

CALL/BEEP

WX_ALERT/BURP

SAVE

Q17:Bt3904

D16: BAW56

Q18:S8550

LPF

U5:D

LM324(1/4)

RSSI

CALL DET

AF_REC_IN

MIC_REC_IN

1050Hz&ATIS

B+7.4V

CALL DET

U5:C

CALL DET

LM324(1/4)

LCD

U402

HT1621

LCD DRIVER

U205

PIC24FJ64GA006

PWM OUT

REW/ATIS

U4:D

PWM LPF

LM324(1/4)

ATIS

REW AUDIO

1050HZ&ATIS

U5:A

LM324(1/4)

1050Hz&ATIS DET

LCD BACK LAMP

CLONE

BT_TXD/RXD

KEY BACK LAMP 1

Q28

LED DRIVER

RESET

LOB BAT

LOW BAT

B+7.4V

MOD

CALL

ATIS

MIC_REC_IN

B+7.4V

D19

KEY BACK LAMP 2

LED DRIVER

R149R148

B+7.4V

VR3:B

D17

BT KEY BACK LAMP

Q30

Q29

LED DRIVER

7.3728MHz

RESET

XC61CN2702M

+5V

CPU 3.3V

U8:XC6204B502

U10:XC6204B332

BATTERIES

Li-POLYMER_7.4V

VR2

LPF

U4:C

LM324(1/4)

2SC4901

RF AMP

AMP

2SC4901

SAW BPF

156-163MHz

F1:HDF160B

D1,D2

ANT SW

1SS356

2SC4901

LPF

L1,L2

C62,C16

C1,C5,C12

ANT

2SC4901

BUFFER AMP

Q12

2SK3078

TX YOUNGER

RD07MVS1

TX POWER AMP.

RF PART

APC

U2: LM2904

Q10: MB3904

Q11: MB3904

H/M/L POWER CONTROL

R103R102

R104

CURRENT DET

B+7.4V

AF_REC_IN

REW AUDIOBT_AUDIO

CALL/BEEP

WX_ALERT/BURP

R17

10K

R16

10K

R49

10K

VOL

330

VR3:A

R198

VOL 10K

B+7.4V

10K

R192

U11

AF POWER AMP

B+7.4V

S8550

Q16,Q21,Q22

NJM2070

R138

R41

U112:XC6204B332

BT_AUDIO SW

Q23

2SC4097

AF SW

BT3904 X 2

BT_AUDIO

BT 3.3V

U13

BLUETOOTH

BLUETOOTH MOEULE TXB206AR

BT_ANT

SPEAKER

BT_MIC

U4:A,B

LM324(2/4)

MIC AMP

13456

SP/MIC JACK

VHF_MIC

DISASSEMBLY INSTRUCTIONS

To remove the front and rear panels from the main chassis:

1. Remove the SPK/MIC and VOL/SQL knob from the main unit.

2. Remove 4 screws from the rear housing for main unit.

3. Detach the rear housing from the front housing.

ALIGNMENT PROCEDURES

METER

COUNTER

METER

This transceiver is completely aligned at the factory and does not require any adjustments for installation.

However it is considered as good practice to verify that none of the adjustments have changed.

The test equipment listed below are used for the test setup shown in Fig. 3.1.

This test setup used either partially or totally during the following adjustments.

A.TEST EQUIPMENT

1) DC Power Supply (7.2V DC) 0 - 15V 3A max.

2) RF Power Meter 10 W 50 Ohm 100-200 MHz

3) RF Signal Generator 100-200 MHz, 50 ohm termination

4) FM Linear Detector (FMLD) 100-200 MHz

5) Frequency Counter 1-500 MHz

6) Oscilloscope 20 MHz

7) Distortion Meter

8) SINADDER (Trademark of Helper Instruments Co.)

9) Audio Oscillator

10) Toggle Switch (for use as PTT switch).

Fig. 3.1

AUDIO OSC

PTT

SWITCH

DC POWER

SUPPLY

MIC

UNIT

UNDER TEST

ANT

RF SG

SPEAKER

JACK

COUPLER

RF POWER

OSCILLOSCOPE

SINADDER

FMLD

FREQ

DISTORT

ADJUSTMENT PROCEDURE

Step Adjustment Test Point Procedure

1. Connect digital voltmeter to TP1 on RF PCB.

1 L18 Receive *1 TP1

2 L20 Transmit *1 TP1

3 VC1 *2

VR2

Modulation *2

2. Set CH01 .

3. Adjust L18.

4. TP1 voltage 1.2~1.6V DC.

1. Connect a digital voltmeter to TP1 on RF PCB.

2. Set CH01 .

3. Adjust L20.

4. TP1 voltage 1.2~1.6V DC.

1. Connect the antenna coupler output to a frequency counter.

2. Set channel to CH01 (156.050 MHz).

3. Adjust VC1 to obtain a frequency reading 156.050 MHz±200Hz.

1. Connect the antenna coupler output to an FM linear detector.

2. Connect Audio Oscillator to Microphone Jack.

3. Set unit to transmit mode.

4. Set audio oscillator output to -23dBm 1 kHz.

5. Adjust VR2 to obtain ±4.5 kHz deviation.

Remark: *1: Please reference the “Main PCB Bottom View” drawing in page 13.

*2: Please reference the “Main PCB Top View” drawing in page 12.

WIRING DIAGRAM

MainPCBTopView

PRINTEDCIRCUITBOARD

VR2

VC1

MainPCBBottomView

PRINTEDCIRCUITBOARD

L18

L20

CradleChargerPCBView

PRINTEDCIRCUITBOARD

TopView

BottomView

TROUBLESHOOTING

Item Symptom Possible Cause

 Defective power switch VR3.

1 Unit does not turn on.

Speaker no sound with

AF signal applied to

volume control

3 Squelch circuit inoperative

4 No receive (RX)

5 Low receiver sensitivity

6 No transmit (TX)

7 Low RF power output

8 Poor or no modulation

Deviation of transmit

frequency

 Check the battery voltage.

 Defective regulator U8.

 Defective volume control.

 Defective speaker.

 Defective U11 and/or associated components.

 Check squelch control.

 Defective U1 and/or associated circuitry between pin 9, 10 and

11.

 Defective regulator U8.

 Check TP1 voltage 0.5 – 4V;

 Check second OSC 20.95MHz, pin9 of U6;

 Defective Q7, Q8, Q2.

 Check U1 audio output voltage at pin 9.

 Defective F1 and F2;

 Check antenna and connector for possible corrosion or bad

connection.

 Failure of the output from Q7, Q8, Q2, U1

 Check the output level of local OSC.

 Defective PTT switch.

 Defective regulator U8.

 Check TP1 voltage 0.5 – 4V;

 Check power transmits circuit Q12, Q6, D1, D2 and Q1;

 Check power control circuit Q17, Q18, Q24;

 Check power control circuit U2;

 Check RF power output from Q6, If it checks good, then check

and antenna switching diode D1, D2.

If not good then check the voltage level outputs of the drive

amplifiers Q3 and Q12 as well as the associated circuitry.

 Defective microphone.

 Defective U4 and/or its associated components.

 Check crystal X2 and VC1.

EXPLODEDVIEW(forHH475MainPart)

EXPLODEDVIEW(forBatteryand Antenna)

Main Radio Part

Location Codes

Description

Mfr's Part No.

EXPLODED VIEW PART LIST

1 D-LENS PMMA MU TM833FBUSL 270100034-12003-10 2 P-FCAB MU PC BK TM833FBUSL 3U2X 270100031-12002-10 3 P-KEY VOL MU ABS BK TM833FBUSL 3U2X 270100530-11001-10 4 M-SLEE MU SS L5.15 W5 H4.4 SW 260301122-00001-10 5 P-KEY C/F MU ABS BK TM832EUL MIC 3U2X 270101280-12001-10 6 FOAM-HDR RUBB L34.1W26.3T4.7 GREY DS022 320100108-00001-10 7 INSU-SHET FILM W L-- W-- D6.4 WATERPROOF 270110610-00000-10 8 PCB SS FR4 GP MIC 1-4 L6W8T1.0 TM833FBEU 250102596-00003-10

9 MIC CDR -U -38dB 10V D6.0 T2.7 EM-27PX-5 290100345-00000-10 10 P-PLATE MU PC BK TM832 PTT MOUNT 3U2X 270102092-12001-10 11 KEY-P MAIN RUB DG 6K TM833FBEUL 433C (only for EU) 270200054-11008-10

KEY-P MAIN RUB DG 6K TM833FBUSL 433C (only for US) 270200054-11005-10 12 KEY PTT RUB G 1K TM832 270200131-11001-10 13 KEY FUN SR T 2K TM832FEUL RIGHT 433U/201 (only for EU) 270200016-11004-10

KEY FUN SR T 2K TM832FUSL RIGHT 433U/201 (only for US) 270200016-11003-10 14 KEY FUN SR T 2K TM832FEUL LEFT 433U 270200118-11002-10 15 M-MOUN MU SS L39.3 W37.8 H10.6 LCD 260301094-12001-10 16 LCD TN TSF P 5V 1/4D 1/3B L38.5W37T1.8 - 220100028-00000-10 17 INSU-SHET PVC W L36 W36 D-- ASTIGMATISM 270102604-00001-10 18 D-LENS PMMA MU TM832FEUL Transparent L40 270101425-11002-10 19 SCREW-TS WRH L5 D2 + CZ F RWB (Four) 260100191-00000-10 20 TM833FBEUL /PCBA MAIN/PCBA /R0 COBRA/EU/ 330200008-00000-10 21 M-COVR MU AL L67 W33.2 H6 260300141-11001-10 22 O-RING MU BK RUB H1.4OD--L118.5W62 3U2X 270200053-12001-10 23 M-WASH MU CU NI L10.55 W1.09 H0.2 (Two) 260300005-11001-10 24 SCREW-TS RH L8 D2.6 + SUS C (Two) 260100022-00000-10 25 M-BRKT MU SS L20 W19 H10 SUS304 260302983-11000-10 26 M-SHAF MU PB GD L10.7 W3.6 H-- (Two) 260300007-00001-10 27 P-HOLDER MU ABS BK TM833FBUSL CONNECTOR (Two) 270100532-11001-10 28 P-RCAB MU PC O TM833FBUSL 021U 270100529-11001-10 29 P-CLIP BU PC BK TM832/TM833 ATTACHMENT 3 270102095-12001-10 30 SCREW-TS RH L10 D3 + BZ SUS F BLACK 260101177-00000-10 31 SCREW-TS PH L12 D-- + BZ SUS F TM832FEUL(Four) 260101179-00001-10 32 FOAM-HDR RUBB D1.8T1 NA Black SCREW CAP (Five) 320100751-00001-10 33 M-SPPT MU SS L20 W1 H1 LOCK PIN 260301096-00001-10 34 P-COVER MU PC BK TM832EUL 3U2X/WITH PAIN 270100455-12002-10 35 M-SHIE MU TP NI L20.4 W14.1 H8.5 VCO 260301003-00001-10 36 INSU-SHET PVC W L35.4 W33.4 D0.1 TM832FE 270110041-00001-10 37 INSU-SHET PAP S L40 W1.3 D0.1 TM832FEUL (Three) 270110039-00001-10 38 P-PLATE MU PMMA BK TM832/TM833 KEYBOARD 270102091-12001-10 39 SPK M 8OHM 1W D40 T5.2 TEK404P-8 OHM1W 290100070-00000-10 40 FOAM-SPK NYL D37.3T-- SS BLACK TM833FBEU 320101847-00001-10 41 INSU-TAPE FILM BK L-- W-- D9.4 WATERPROO 270110368-00000-10 42 FOAM-CUH SPNG D9.5T1.4 SS BLACK TM833FBE 320101869-00001-10

Battery Part

Location Codes

Description

Mfr's Part No.

Antenna Part

Location Codes

Description

Mfr's Part No.

EXPLODED VIEW PART LIST - CONTINUED

43 P-BATT-DR BU ABS BK TM832EUL 3U2X 270101071-12001-10 44 FOAM-HDR SPNG L40W8T1 Black (Two) 320100666-00001-10 45 BAT-R PRISM LI 7.4V 1000MAH TP603450 TEC 230400180-00000-10 46 O-RING BD BK RUB H5.4OD--L94.05W59 270200380-13001-10 47 P-RCAB BT ABS BK TM833 3U 2X 270100953-11001-10 48 CON-COMM PB T0.2H5WD-- GD C (Two) 260300377-11001-10 49 CON-CHAR PB T0.2H3.5WD-- GD UNIT (Three) 260300380-11001-10

50 P-CAP BU ABS BK TM833/832 ANT 3U2X 270102110-11001-10 51 P-SLV-ANT BU PU BK TM832EUL ANT 3U2X 270102093-12001-10 52 SPRING COS ANT SW CU WD1 L158.5 OD:6.8MM 260200009-00000-10

Location Codes

Description

Mfr's Part No.

TM833FBEUL /U- U-M /R0 COBRA/EU

330100058-00000-10

TM833FBEUL /U- MAIN/UNIT /R0 COBRA/EU

330100062-00000-10

TM833USL /E&M ALK BATT COMP /R0 COBRA-US

330503423-00000-10

TM833FBEUL /PCBA MAIN/PCBA /R0 COBRA/EU/

330200008-00000-10

TM833FBEUL /PCBA MAIN/SOLDERING/PCBA /R0

330201917-00000-10

TM832EUL /COBA LCD BONDING PCBA /R0 COBR

330301732-00000-10

TM832EUL /SMTA LCD PCBA /R0 COBRA-EUR

330401965-00000-10

Alkaline Battery Assembly

SPRING COS GD WD0.6 L31.2 260200065-00000-10 SPRING COS GD WD0.6 L22.1(Two) 260200066-00000-10 SPRING COS GD WD0.6 L22.1(Two) 260200067-00000-10 SPRING COS GD WD0.6 L23.3 260200068-00000-10 CON-POST PB T0.2H14.1WD-- GD BATT B 260300376-11001-10 CON-COMM PB T0.2H75.3WD-- GD A 260300379-12001-10 P-RCAB BT ABS BK TM833USL 3U 2X 270100527-13001-10 INSU-SHET FIBER BK L75.3 W3.9 D-- 0.15 270102608-00001-10 O-RING BD BK RUB H5.4OD--L94.05W59 270200380-13001-10

Main PCB Assembly

16 LCD TN TSF P 5V 1/4D 1/3B L38.5W37T1.8 - 220100028-00000-10

RUBCON SRI PIT0.10 L30.1 W2.0 H5.2 240300313-00000-10 21 M-COVR MU AL L67 W33.2 H6 260300141-11001-10 35 M-SHIE MU TP NI L20.4 W14.1 H8.5 VCO 260301003-00001-10 15 M-MOUN MU SS L39.3 W37.8 H10.6 LCD 260301094-12001-10

SHIELD VCOC MS NI L21.7 W14.7 T3.8 SILVE 260302892-11001-10 18 D-LENS PMMA MU TM832FEUL Transparent L40 270101425-11002-10 17 INSU-SHET PVC W L36 W36 D-- ASTIGMATISM 270102604-00001-10

INLAY MKEY PVC L34 W22 TM832/TM833 UNIT 270102692-11001-10

INLAY MKEY PET L25.4 W7.6 TM832/833 (Two) 270102693-11001-10 37 INSU-SHET PAP S L40 W1.3 D0.1 TM832FEUL (Three) 270110039-00001-10 36 INSU-SHET PVC W L35.4 W33.4 D0.1 TM832FE 270110041-00001-10

FOAM-CUH SILI L12W6.5T3 GREY 320100009-00001-10

FOAM-HDR SPNG L40W4T3 Grey (Four) 320100664-00001-10

FOAM-CUH SPNG L9W7T1 White 320100696-00000-10

FOAM-SPON SPNG L33.4W3.0T2.0 BLACK TM832 320101829-00001-10

PARTS LIST (HH475 Eu)

C109 CAP-RELE 100 uF M 10V D5 H8 280201079-00000-10 C178 CAP-RELE 100 uF M 10V D5 H8 280201079-00000-10 C179 CAP-RELE 100 uF M 10V D5 H8 280201079-00000-10 C180 CAP-RELE 100 uF M 16V D6 H5 280201082-00000-10 C185 CAP-RELE 10 uF M 25V D4 H5 280201073-00000-10

F3 XTL 21.4M 2.5 2pF L3.2 W8 H6 -20C ~ 70C 280700099-00000-10 F4 XTL 21.4M 2.5 2pF L3.2 W8 H6 -20C ~ 70C 280700099-00000-10 F5 FLTR-REC LEAD 450 K +/-7.5 KHz@ 6dB LTM4 280700243-00000-10

U13 RF-MOD BLUETOOTH TXB-206AR 2.4GHZ TXBANG 320200029-00000-10

VR3 VR-ST LOG 10 Kohm P DIP H R A;JIS;W/S 280101743-00000-10

X1 FLTR-REC LEAD 450 K +/-4 KHz@ 3dB CDB450 280700253-00000-10 X2 XTL 20.95M 2.5 15pF L8 W7.8 H3 -30C ~ 50 280700161-00000-10 X3 XTL 7.3728 M 30 12.5pF D3.0 H8.0 -10+60 280700031-00000-10

MIC CDR -O -52dB 3V D9.7 T4.5 LYS-M9745- 290100001-00000-10

U401 A-IC ANA HT1621(DICE-SD1706) CHIP 48 BON 210100060-00000-10

PCB DS FR4 GP LCD3 L32W20T1 250100356-00003-10

C401 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C407 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10

Location Codes

Description

Mfr's Part No.

TM832EUL /SMTA PTT PCBA /R0 COBRA-EUR

330401964-00000-10

TM833FBEUL /SMTA MAIN/TOP/SMD/PCBA /R0 C

330401411-00000-10

PARTS LIST (HH475 Eu) - CONTINUED

Main PCB Assembly

C409 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 R401 RES TFC 4.7 Kohm 0402 J 1/16W 280101287-00000-10 R402 RES TFC 100 ohm 0402 J 1/16W 280100919-00000-10

SW-TACT SMD V 12V 5mA TSUY-2SL 1P2T HUA (Two) 240400313-00000-10

PCB DS FR4 GP PTT2 L33W8T1 250100355-00002-10

C14 CAP-CCER 27 pF J 50 VDC 0603 COG 280200800-00000-10 C31 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C33 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C35 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C37 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C40 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C41 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C54 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C61 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C71 CAP-CCER 56 pF J 50 VDC 0402 COG 280200859-00000-10

C88 CAP-CTAN 22 uF M 10 VDC CASEA 280201245-00000-10 C100 CAP-CCER 470 pF J 50 VDC 0402 COG 280200840-00000-10 C101 CAP-CCER 470 pF J 50 VDC 0402 COG 280200840-00000-10 C102 CAP-CCER 470 pF J 50 VDC 0402 COG 280200840-00000-10 C110 CAP-CCER 2 pF C 50 VDC 0402 COG 280200779-00000-10 C113 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C114 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C117 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C118 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C119 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C120 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C126 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C129 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C136 CAP-CCER 220 nF Z 16 VDC 0402 Y5V 280200303-00000-10 C137 CAP-CCER 33 nF K 16 VDC 0402 X7R 280200428-00000-10 C138 CAP-CCER 33 nF K 16 VDC 0402 X7R 280200428-00000-10 C139 CAP-CCER 33 nF K 16 VDC 0402 X7R 280200428-00000-10 C141 CAP-CCER 220 pF J 50 VDC 0402 COG 280200786-00000-10 C142 CAP-CCER 220 pF J 50 VDC 0402 COG 280200786-00000-10 C146 CAP-CCER 820 pF J 50 VDC 0402 COG 280200888-00000-10 C153 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C166 CAP-CCER 47 nF K 25 VDC 0402 X7R 280200453-00000-10 C168 CAP-CTAN 2.2 uF M 16 VDC CASEA 280201248-00000-10 C176 CAP-CCER 10 pF J 50 VDC 0402 NPO 1570-03 280200583-00000-10 C177 CAP-CCER 10 pF J 50 VDC 0402 NPO 1570-03 280200583-00000-10 C181 CAP-CCER 1 uF Z 6.3 VDC 0402 Y5V 280200290-00000-10 C199 CAP-CCER 3 pF C 50 VDC 0402 COG 280200811-00000-10 C203 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10 C208 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C209 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C216 CAP-CTAN 22 uF M 10 VDC CASEA 280201245-00000-10 C217 CAP-CCER 100 nF K 16 VDC 0402 X7R 280200343-00000-10 C225 CAP-CCER 1 uF Z 10 VDC 0603 Y5V 280200293-00000-10 C227 CAP-CCER 1000 pF K 50 VDC 0402 X7R 1570- 280200327-00000-10

+ 46 hidden pages

Cobra MR HH475 FLT BT, MR HH475 FLT ET, MR HH475 FLT EU Serivce Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

THEORY OF OPERATION

DISASSEMBLY INSTRUCTIONS

ALIGNMENT PROCEDURES

ADJUSTMENT PROCEDURE

WIRING DIAGRAM

TROUBLESHOOTING

EXPLODED VIEW PART LIST