Motorola PRO2150 Manuel de service

PRO2150™ Portable RadioDetailed Service Manual

August 30, 2002 99R85452E01-O1-2Introduction: Warranty and Service Support1.2.3 Piece PartsSome replacement parts, spare parts, and/or product informa

8-22 August 30, 2002 99R85452E01-OFigure 8-16. UHF 403-440 MHz Main Board Bottom SideR652R651R650C634C627R639R640R641C608C607R609R608C604R607C605C603

8-2399R85452E01-O August 30, 2002Figure 8-17. UHF 403-440 MHz RF Schematics DiagramJ40102D04852JL4150.4-1.0-5TC4409pC44310pL4160.4-1.0-5TC4411.5pC44

8-24August 30, 2002 99R85452E01-OUHF 403-440 MHz Radio Parts List (Controller Board)Circuit Ref Description VendorVendor Part NumberMotorola Equivalen

8-2599R85452E01-O August 30, 2002R112 13 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 133 0662057A76R113 22 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 223 0662057A81R114 43

8-26August 30, 2002 99R85452E01-OUHF 403-440 MHz Radio Parts List (RF Board)Circuit Ref Description VendorVendor Part NumberMotorola Equivalent Part N

8-2799R85452E01-O August 30, 2002C438 100pF; 50V; +-5% Murata GRM39CH101J50PT 2113740F51C439 220pF; 50V; +-10% Murata GRM39B221K50PT N/AC440 9pF; 50V;

8-28August 30, 2002 99R85452E01-OC605 680pF; 50V; +10% Murata GRM39B681K50PT N/AC606 0.1uF; 16V; +-10% Murata GRM39B104K16PT N/AC607 0.1uF; 16V; +-10%

8-2999R85452E01-O August 30, 2002Q613 PNP Rohm DTA144EETL N/AQ616 FET Toshiba SSM3K03FE-TE85L N/AQ701 Digital transistor Rohm DTC144EETL 4880048M03Q70

8-30August 30, 2002 99R85452E01-OCERAMIC FILTER:F401 NUF501 Ceramic filter To k o BLFYM455D N/AF502 455Khz TOKO ALFYM455G N/ACRYSTALF402 Filter , 45.1

8-3199R85452E01-O August 30, 2002R437 4.7 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 472 0662057A65R438 1 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 102 0662057A49R439 33

99R85452E01-O August 30, 2002Introduction: Radio Model Information 1-31.3 Radio Model InformationThe model number and serial number are located on a l

8-32August 30, 2002 99R85452E01-OR628 0 ohm; 0.1W; +-5% Rohm MCR03 EZHJ 000 0662057B47R629 NUR631 NUR633 18 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 183 06620

8-3399R85452E01-O August 30, 2002Chapter 8 UHF 435-480 MHz Circuit Board/Schematic Diagrams and Parts List

8-34 August 30, 2002 99R85452E01-OFigure 8-18. UHF 435-480 MHz Controller BoardC142C141R109R108Q119Q118Q116 Q115R107LC101M101C140Q114C171C139C138C137

8-3599R85452E01-O August 30, 2002Figure 8-19. UHF 435-480 MHz Main Board Top SideR652R651R650C634C627R639R640R641C608C607R609R608C604R607C605C603R60

8-36 August 30, 2002 99R85452E01-OFigure 8-20. UHF 435-480 MHz Main Board Bottom SideJ401C714C716C715J701C718C717C402 R401 R402C406R455C404 C401C408

8-3799R85452E01-O August 30, 2002Figure 8-21. UHF 435-480 MHz Complete Controller Board Schematic DiagramQ115R10747Q116COM01COM12COM23COM34SEG05SEG1

8-38 August 30, 2002 99R85452E01-OFigure 8-22. UHF 435-480 MHz Main BoardC4018p(R2) 8p(R1)C4025p(R2) 4p(R1)Q4011SV279Q4021SV279L4010.3-1.0-5TC4072p(R

8-3999R85452E01-O August 30, 2002UHF 435-480 MHz Radio Parts List (Controller Board)Circuit Ref Description VendorVendor Part NumberMotorola Equivalen

8-40August 30, 2002 99R85452E01-OR112 13 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 133 0662057A76R113 22 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 223 0662057A81R114 43

8-4199R85452E01-O August 30, 2002UHF 435-480 MHz Radio Parts List (RF Board)Circuit Ref Description VendorVendor Part NumberMotorola Equivalent Part N

August 30, 2002 99R85452E01-O1-4Introduction: Radio Features1.4 Radio FeaturesFeaturePRO2150CPS UserAccessibility YesYesNormal OperationRx/Tx XXClonin

8-42August 30, 2002 99R85452E01-OC440 10pF; 50V; +-0.5pF Murata GRM39CH100D50PT 2113740F27C441 1.5pF; 50V; +-5% Murata GRM39CK1R5C50PT N/AC442 1pF; 50

8-4399R85452E01-O August 30, 2002C606 0.1uF; 16V; +-10% Murata GRM39B104K16PT N/AC607 0.1uF; 16V; +-10% Murata GRM39B104K16PT N/AC608 NUC612 10pF; 50V

8-44August 30, 2002 99R85452E01-OL414 Airwound Coil Uchida/Latest E2-0.40-1.0-5TL N/AL415 Airwound Coil Uchida/Latest E2-0.40-1.0-5TL N/AL416 Airwound

8-4599R85452E01-O August 30, 2002Q916 FET NEC 2SJ243-T1 N/AQ921 Var. Cap. Diode Toshiba JDV2S01E-TPH3 N/AQ922 Var. Cap. Diode Toshiba 1SV270-TPH3 N/AR

8-46August 30, 2002 99R85452E01-OR454 15 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 153 0662057A77R455 100 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 104 0662057A97R459 3

8-4799R85452E01-O August 30, 2002R648 470 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 474 0662057B14R649 100 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 104 0662057A97R650

8-48 August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank

Glossary of Terms GlossaryTerm DefinitionActive Scan State The state when the radio is in Scan Mode, and when the radio is rapidly moving through the

August 30, 2002 99R85452E01-OGlossary-2Digital Private Line (DPL)DPL is a digital format transmitted along with the carrier. DPL allows for more use a

99R85452E01-O August 30, 2002Glossary-3MinimumFrequencyThe lowest frequency setting at which the radio is allowed to operate. The radio’s frequency ra

99R85452E01-O August 30, 2002Introduction: Radio Features 1-5Tx PL/DPLXTOCXPower LevelXBCLXCh AliasXCh SpacingXPTT ID On/OffXPL Required for SelcallXS

August 30, 2002 99R85452E01-OGlossary-4Priority #1 Scan List MemberThe first member in the current Scan List. When the radio is scanning a Scan List (

99R85452E01-O August 30, 2002Glossary-5Reverse Burst / Turn Off CodeCauses a Tone Private Line (TPL) or Digital Private Line (DPL) code to be transmit

August 30, 2002 99R85452E01-OGlossary-6Squelch Level The amount of carrier energy required to unmute the radio’s speaker upon satisfying the selected

99R85452E01-O August 30, 2002Glossary-7User Defined PL FrequencyYou can customize up to three non standard PL frequencies to provide more choices for

August 30, 2002 99R85452E01-OThis Page Intentionally Left BlankGlossary-8

99R85452E01-O*9985452E01*MOTOROLA and the Stylized M Logo are registered in theU.S. Patent and Trademark Office. All other product or servicenames are

August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank1-6Introduction: Radio Features

Chapter 2 Maintenance2.1 IntroductionThis chapter provides details about the following:• Preventive Maintenance• Safe Handling of CMOS and LDMOS Devic

August 30, 2002 99R85452E01-O2-2Maintenance: Safe Handling of CMOS and LDMOS DevicesNOTE: Always use a fresh supply of alcohol and a clean container t

99R85452E01-O August 30, 2002Maintenance: Repair Procedures and Techniques — General 2-3When soldering near the 20-pin and 40-pin connectors: • Avoid

August 30, 2002 99R85452E01-O2-4Maintenance: Disassembling and Reassembling the Radio — General2.4.5 ShieldsRemoving and replacing shields will be don

99R85452E01-O August 30, 2002Maintenance: Radio Disassembly — Detailed 2-52.6 Radio Disassembly — Detailed2.6.1 Front Cover from Chassis Disassembly1.

August 30, 2002 99R85452E01-O2-6Maintenance: Radio Disassembly — Detailed7. Lift the rear chassis away from the front cover (See Figure 2-3.). Be care

99R85452E01-O August 30, 2002Maintenance: Radio Disassembly — Detailed 2-72.6.2 Control Board Disassembly1. Remove the screws which hold the control b

August 30, 2002 99R85452E01-O2-8Maintenance: Radio Reassembly — Detailed2.7 Radio Reassembly — Detailed2.7.1 RF Board Reassembly1. Place the RF board

99R85452E01-O August 30, 2002Maintenance: Radio Reassembly — Detailed 2-92. Remove the rubber button insert behind the retainer (See Figure 2-9.).3. P

August 30, 2002 99R85452E01-O2-10Maintenance: Radio Reassembly — Detailed7. Place the front cover over the tabs on the rear diecast.8. Insert the On/O

99R85452E01-O August 30, 2002Maintenance: Radio Reassembly — Detailed 2-1112. Attach the battery.13. Attach the On/Off Volume knob and the antenna.Fig

August 30, 2002 99R85452E01-O2-12Maintenance: Mechanical View and Parts List2.8 Mechanical View and Parts List2.8.1 Exploded View and Parts ListFigure

99R85452E01-O August 30, 2002Maintenance: Mechanical View and Parts List 2-13ItemPartNumberDescription1 DS1M001110 Front Cover Kit2 DS1M001120 Chassis

August 30, 2002 99R85452E01-O2-14Maintenance: Service Aids2.9 Service AidsTable 2-1 lists service aids recommended for working on the PRO2150 Portable

99R85452E01-O August 30, 2002Maintenance: Test Equipment 2-152.10 Test EquipmentTable 2-2 lists test equipment required to service the PRO2150 Portabl

Table of Contents i99R85452E01-O August 30, 2002User Safety, Training, and General Information...vChapter 1 Int

August 30, 2002 99R85452E01-O2-16Maintenance: Programming Cable (DSK001C706)2.11 Programming Cable (DSK001C706)Figure 2-17. Figure 2-18. 1: DCD2: RX

99R85452E01-O August 30, 2002Maintenance: IF Test Box (DSK001C702) 2-172.12 IF Test Box (DSK001C702)Figure 2-19. SP +SP -MicGNDPRGSP101INT_SPEAKERR10

August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank2-18Maintenance: IF Test Box (DSK001C702)

Chapter 3 Radio Tuning3.1 IntroductionThis chapter provides an overview of the software and hardware tuning material available for the PRO2150 Portabl

August 30, 2002 99R85452E01-O3-2Radio Tuning: Affixing Antenna Ground Plate3.3 Affixing Antenna Ground Plate(Strictly for Radio’s Testing and Tuning P

99R85452E01-O August 30, 2002Radio Tuning: Hardware Tuning Setup and Procedure 3-33.4 Hardware Tuning Setup and ProcedureThere is a silver seal on the

August 30, 2002 99R85452E01-O3-4Radio Tuning: Hardware Tuning Setup and Procedure3.4.2 Sub-Audio Modulation Tuning1. Set the radio to transmit at the

Chapter 4 Radio Programming4.1 IntroductionThe PRO2150 Portable Radio can be programmed by using the Customer Programming Software (CPS).4.2 Programmi

August 30, 2002 99R85452E01-O4-2Radio Programming: CPS Programming4.2.6 Error ConditionsAn error may occur when cloning a radio. When this happens, an

99R85452E01-O August 30, 2002Radio Programming: Programming 4-34.4 Programming4.4.1 PL Frequencies and CodesNOTE: PL1, PL2, PL3 are the User Defined P

ii Table of ContentsAugust 30, 2002 99R85452E01-OChapter 3 Radio Tuning ... 3-13.1

August 30, 2002 99R85452E01-O4-4Radio Programming: Programming4.4.2 DPL CodesNOTE: The codes marked with an asterisk are not part of the 83 standard E

99R85452E01-O August 30, 2002Radio Programming: Programming 4-54. Press + again. Enter 036, when 2-02- appears, and subsequently in this manner, enter

August 30, 2002 99R85452E01-O4-6Radio Programming: ProgrammingThis Page Intentionally Left Blank

Chapter 5 Error Code Displays5.1 Error CodesThe radio performs cursory tests during start-up and during operations to determine if its basic electroni

August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank5-2Error Code Displays: Error Codes

Chapter 6 Accessories6.1 Antennas8504762J01_ 14cm Antenna, 136-155MHz8504762J02_ 14cm Antenna, 155-174MHzPMAD4012_ 9cm Antenna, 136-155MHzPMAD4013_ 9c

August 30, 2002 99R85452E01-O6-2Accessories: ManualsPMLN4443_ MAG ONE Ear Receiver w/In-line PTT/MIC/Vox SwitchPMLN4444_ MAG ONE Earset Boom Mic w/In-

Chapter 7 VHF Band Information 7.1 Model Chart PRO2150 Portable Radio, VHF, 136-174 MHzModel DescriptionLAH49KDH8AA9_N PRO2150, 136-174MHz, 1-5W, 12.5

7-2 SpecificationsAugust 30, 2002 99R85452E01-O7.2 SpecificationsGeneralTransmitterReceiverAll specifications are subject to change without notice.VHF

99R85452E01-O August 30, 2002VHF Band Information: Theory of Operation 7-37.3 Theory of Operation7.3.1 General InformationYour radio has two printed c

Table of Contents iii99R85452E01-O August 30, 2002Chapter 7 VHF Band Information ... 7-17.1 Model

August 30, 2002 99R85452E01-O7-4VHF Band Information: Theory of Operation7. The radio restores last power up state (i.e. state before the radio was tu

99R85452E01-O August 30, 2002VHF Band Information: Theory of Operation 7-5RF output from the active VCO is AC coupled to the synthesizer Q323 prescale

August 30, 2002 99R85452E01-O7-6VHF Band Information: Theory of Operation7.3.6.3 Power ControlOutput power is controlled by the CPU (Q101), the D/A c

99R85452E01-O August 30, 2002VHF Band Information: Theory of Operation 7-77.3.7.3 MixerThe mixer is a DBM type (L407, Q407, L408). The mixer LO frequ

August 30, 2002 99R85452E01-O7-8VHF Band Information: Block Diagrams7.4 Block Diagrams7.4.1 CompleteFigure 7-2. SAVE 5VRX 5V5VDACRXKeyPadPowerInputTX

99R85452E01-O August 30, 2002VHF Band Information: Block Diagrams 7-97.4.2 ControllerFigure 7-3. 7.4.3 VCOFigure 7-4. KeyPad35RCNETWORK9RCNETWORK3MI

August 30, 2002 99R85452E01-O7-10VHF Band Information: Block Diagrams7.4.4 TransmitterFigure 7-5. 7.4.5 ReceiverFigure 7-6. ANTTo ReceiverTX +B+BTX

99R85452E01-O August 30, 2002VHF Band Information: Troubleshooting Charts 7-117.5 Troubleshooting ChartsFigure 7-7. Troubleshooting FlowChart for Rec

August 30, 2002 99R85452E01-O7-12VHF Band Information: Troubleshooting ChartsFigure 7-8. Troubleshooting Flow Chart for TransmitterStartNoPowerIs+5VT

99R85452E01-O August 30, 2002VHF Band Information: Troubleshooting Charts 7-13Figure 7-9. Isinformationfrom µP Q101correct?Is Q330 corrector AT4.65 V

iv Table of ContentsAugust 30, 2002 99R85452E01-OThis Page Intentionally Left Blank

August 30, 2002 99R85452E01-O7-14VHF Band Information: Troubleshooting ChartsFigure 7-10. Troubleshooting Flow Chart for MicrocontrollerSTARTAPPLY PO

99R85452E01-O August 30, 2002VHF Band Information: Troubleshooting Charts 7-15Figure 7-11. Make sure Synthesizer isworking correctly. 1.6 VDC atQ308

August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank7-16VHF Band Information: Troubleshooting Charts

7-1799R85452E01-O August 30, 2002Chapter 7 VHF 136-174 MHz Circuit Board/Schematic Diagrams and Parts List

7-18 August 30, 2002 99R85452E01-OFigure 7-12. VHF 136-174 MHz Controller BoardTop Side Bottom SideC142C141R109R108Q119Q118Q116 Q115R107LC101M101DOWN

7-1999R85452E01-O August 30, 2002Figure 7-13. VHF 136-174 MHz Main Board Bottom SideC633C630R652R651R650C634C627R639R640R641C608C607R609R608C604R607

7-20 August 30, 2002 99R85452E01-OFigure 7-14. VHF 136-174 MHz Main Board Top SideJ401J703J704C714C716C715C717C718R205R204C218C142Q403C407R402R405R40

7-2199R85452E01-O August 30, 2002Figure 7-15. VHF 136-174 MHz Complete Controller Board Schematic DiagramR1200Q115R109330R108330A01A12A23Vss4SDA5SCL

7-22 August 30, 2002 99R85452E01-OFigure 7-16. VHF 136-174 MHz RF Board Schematic DiagramC38 08pC381NUJ40102D04852JQ7111SR154-400R61150kC44012pC6420.

7-2399R85452E01-O August 30, 2002VHF 136-174 MHz Radio Parts List (Controller Board)Circuit Ref Description VendorVendor Part NumberMotorola Equivale

User Safety, Training, and General InformationProduct Safety and RF Exposure ComplianceATTENTION!This radio is restricted to occupational use only to

7-24 August 30, 2002 99R85452E01-OCRYSTAL:X101 Filter, 8.388608 MHz Daishinkuu AT-38 DSXT182001RESISTOR:R101 0 ohm; 0.1W; +-5% Rohm MCR03 EZHJ 000 066

7-2599R85452E01-O August 30, 2002VHF 136-174 MHz Radio Parts List (RF Board)Circuit Ref Description VendorVendor Part NumberMotorola Equivalent Part

7-26 August 30, 2002 99R85452E01-OC417 16pF; 50V; +-5% Murata GRM39CH160J50PT 2113740F32C418 100pF; 50V; +-5% Murata GRM39CH101J50PT 2113740F51C419 10

7-2799R85452E01-O August 30, 2002C529 0.1uF; 16V; +-10% Murata GRM39B104K16PT N/AC530 0.1uF; 16V; +-10% Murata GRM39B104K16PT N/AC531 220pF; 50V; +-1

7-28 August 30, 2002 99R85452E01-OQ413 NPN NEC 2SC3356-T1B R24 N/AQ414 NPN Toshiba 2SC5086-Y TE85L N/AQ416 NPN Toshiba 2SC5086-Y TE85L N/AQ417 PNP Roh

7-2999R85452E01-O August 30, 2002L501 1uH TDK MLF1608A1R0KT N/AL702 390nH Sagami Elec C2012C-R39J 2462587V41JACK:CN201 Connector contact Battery Moto

7-30 August 30, 2002 99R85452E01-OR416 1 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 102 0662057A49R418 39 ohm;0.1W;+-5% Rohm MCR03 EZHJ 390 0662057A15R419 220 o

7-3199R85452E01-O August 30, 2002R569 1 Kohm; 0.25W; +-5% Hokuriku CR1/4-102J N/AR570 120 Kohm; 0.1W; +-5% Rohm MCR03 EZHJ 124 N/AR571 220K ohm Murat

7-32 August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank

Chapter 8 UHF Band Information8.1 Model Charts PRO2150 Portable Radio, UHF, 403-440 MHzModel DescriptionLAH49QCH8AA9_N PRO2150, 403-440MHz, 1-4W, 12.5

August 30, 2002 99R85452E01-OThis Page Intentionally Left Blankvi : Product Safety and RF Exposure Compliance

August 30, 2002 99R85452E01-O8-2UHF Band Information: Model Charts PRO2150 Portable Radio, UHF, 435-480 MHzModel DescriptionLAH49RCH8AA9_N PRO2150, 43

8-3 SpecificationsAugust 30, 2002 99R85452E01-O8.2 SpecificationsGeneralTransmitterReceiverUHFFrequency: 403-440 MHz435-480 MHzChannel Capacity: 99Pow

August 30, 2002 99R85452E01-OThis Page Intentionally Left Blank8-4UHF Band Information: Theory of Operation8.3 Theory of Operation8.3.1 General Inform

99R85452E01-O August 30, 2002UHF Band Information: Theory of Operation 8-56. This personality data is used to initialize the radio.7. The radio restor

August 30, 2002 99R85452E01-O8-6UHF Band Information: Theory of Operation8.3.5.3 SynthesizerThe frequency synthesizer is a large-scale monolithic syn

99R85452E01-O August 30, 2002UHF Band Information: Theory of Operation 8-78.3.6.3 Power ControlOutput power is controlled by the CPU (Q101), the D/A

August 30, 2002 99R85452E01-O8-8UHF Band Information: Theory of Operation8.3.7.3 MixerThe mixer is a DBM type (L408, L409, Q407). The mixer LO freque

99R85452E01-O August 30, 2002UHF Band Information: Block Diagrams 8-98.4 Block Diagrams8.4.1 CompleteFigure 8-2. SAVE 5VRX 5V5VDACRXKeyPadPowerInputT

August 30, 2002 99R85452E01-O8-10UHF Band Information: Block Diagrams8.4.2 ControllerFigure 8-3. 8.4.3 VCOFigure 8-4. KeyPad35RCNETWORK9RCNETWORK3MI

99R85452E01-O August 30, 2002UHF Band Information: Block Diagrams 8-118.4.4 TransmitterFigure 8-5. 8.4.5 ReceiverFigure 8-6. ANTTo ReceiverTX +B+BTX

Chapter 1 Introduction1.1 Scope of ManualThis manual is intended for use by service technicians familiar with similar types of equipment. It contains

August 30, 2002 99R85452E01-O8-12UHF Band Information: Troubleshooting Charts8.5 Troubleshooting ChartsFigure 8-7. Troubleshooting Flow Chartfor Rece

99R85452E01-O August 30, 2002UHF Band Information: Troubleshooting Charts 8-13Figure 8-8. Troubleshooting Flow Chart for TransmitterStartNoPower+5VTX

August 30, 2002 99R85452E01-O8-14UHF Band Information: Troubleshooting ChartsFigure 8-9. Is informationfrom µP Q101correct?Is Q330 corrector AT4.65 V

99R85452E01-O August 30, 2002UHF Band Information: Troubleshooting Charts 8-15Figure 8-10. Troubleshooting Flow Chart for MicrocontrollerSTARTAPPLY P

August 30, 2002 99R85452E01-O8-16UHF Band Information: Troubleshooting ChartsFigure 8-11. Make sure Synthesizer isworking correctly. 1.6 VDC atQ308 B

8-1799R85452E01-O August 30, 2002Chapter 8 UHF 403-440 MHz Circuit Board/Schematic Diagrams and Parts List

8-18 August 30, 2002 99R85452E01-OFigure 8-12. UHF 403-440 MHz Controller BoardC140Q114C171C139C138C137Q121C129R173R174R182C135R180R177C117C173C136R1

8-1999R85452E01-O August 30, 2002Figure 8-13. UHF 403-440 MHz Top Side Controller BoardC142C141R109R108Q119Q118Q116 Q115R107LC101M101

8-20 August 30, 2002 99R85452E01-OFigure 8-14. UHF 403-440 MHz Controller Board SchematicQ115R10747Q116COM01COM12COM23COM34SEG05SEG16SEG27SEG38SEG49S

8-2199R85452E01-O August 30, 2002Figure 8-15. UHF 403-440 MHz Main Board Top SideJ401C714C716C715J701C718C717C402 R401 R402C406R455C404 C401C408 C40