Maxon Telecom SM-2000 service manual Digital Parts Common on Both VHF & UHF

Page 39

MAXON SM-2000 MOBILE

650-000-0001 SM-2150/VHF MAIN BOARD

650-000-0001 SM-2150/VHF MAIN BOARD

DIGITAL SECTION

Digital Parts Common on Both VHF & UHF

REF #	DESCRIPTION		PART #		REF #	DESCRIPTION		PART #
C401	CHIP CERAMIC	0.001UF	130-A17-6Z		C450	CHIP CERAMIC	0.047UF	130-424-0Z
C402	CHIP CERAMIC	0.22UF	130-270-7Y		C452	CHIP TANTALUM	1UF	141-036-1Z
C403	CHIP CERAMIC	0.01UF	130-172-2Z		C453	CHIP CERAMIC	0.01UF	130-172-2Z
C404	ELECT CAPACITOR	10UF	101-025-9		C454	CHIP TANTALUM	1UF	141-036-1Z
C405	CHIP CERAMIC	220PF	132-220-2Z		C455	CHIP CERAMIC	0.033UF	130-314-5Z
C406	CHIP CERAMIC	220PF	132-220-2Z		C456	CHIP CERAMIC	0.001UF	130-A17-6Z
C407	ELECT CAPACITOR	10UF	101-025-9		C457	CHIP CERAMIC	0.047UF	130-424-0Z
C408	CHIP CERAMIC	0.033UF	130-314-5Z		C458	CHIP CERAMIC	0.01UF	130-172-2Z
C409	CHIP CERAMIC	0.0068UF	130-602-4Y		C460	CHIP CERAMIC	0.1UF	130-170-0Y
C410	CHIP CERAMIC	47PF	134-722-1Z		C464	CHIP CERAMIC	0.033UF	130-314-5Z
C411	CHIP CERAMIC	0.1UF	130-170-0Y		C550	CHIP CERAMIC	18PF	131-816-6Z
C412	CHIP CERAMIC	0.015UF	130-A44-0Y		C551	CHIP CERAMIC	18PF	131-816-6Z
C413	CHIP CERAMIC	47PF	134-722-1Z		C552	CHIP CERAMIC	0.01UF	130-172-2Z
C414	CHIP CERAMIC	0.047UF	130-424-0Z		C553	CHIP CERAMIC	0.01UF	130-172-2Z
C415	CHIP CERAMIC	220PF	132-220-2Z		C554	CHIP CERAMIC	0.01UF	130-172-2Z
C416	CHIP CERAMIC	0.01UF	130-172-2Z		C555	CHIP CERAMIC	0.01UF	130-172-2Z
C417	CHIP CERAMIC	0.0047UF	134-719-7Z		C558	ELECT CAPACITOR	10UF	101-025-9
C418	CHIP CERAMIC	0.022UF	130-263-1Z		C559	CHIP CERAMIC	0.01UF	130-172-2Z
C419	CHIP CERAMIC	0.0018UF	130-A22-0Z		CON403	PROG CONNECTOR		421-677-7
C420	CHIP CERAMIC	470PF	134-761-4Z		CON404	OPTION BOARD CONNECTOR		422-746-1
C421	CHIP CERAMIC	470PF	134-761-4Z		D401	DIODE SI CHIP		243-051-5
C422	CHIP CERAMIC	220PF	132-220-2Z		D402	DIODE SWITCHING		243-063-6
C423	CHIP CERAMIC	220PF	132-220-2Z		D551	DIODE SI CHIP		243-049-4
C424	CHIP CERAMIC	220PF	132-220-2Z		D552	DIODE SI CHIP		243-049-4
C425	CHIP CERAMIC	0.1UF	130-A60-4Y		IC401	I.C.		223-224-9
C426	CHIP CERAMIC	0.022UF	130-263-1Z		IC402	I.C. REGULATOR		220-378-0
C428	CHIP CERAMIC	0.01UF	130-172-2Z		IC404	I.C. OP AMP		222-018-5
C429	CHIP CERAMIC	47PF	134-722-1Z		IC405	I.C. OP AMP		231-064-4
C430	CHIP CERAMIC	0.1UF	130-A60-4Y		IC406	I.C. OP AMP		222-018-5
C431	CHIP CERAMIC	0.0033UF	130-315-6Z		IC407	I.C.		231-073-3
C432	CHIP CERAMIC	0.68UF	130-624-4		IC408	I.C. EEPROM		229-463-8A
C433	CHIP CERAMIC	0.082UF	130-808-4Y		IC409	I.C.		220-130-2
C434	CHIP CERAMIC	120PF	131-107-9Z		IC410	I.C. OP AMP		222-018-5
C435	ELECT CAPACITOR	1UF	101-006-2		IC411	I.C.		223-261-2
C436	CHIP CERAMIC	0.1UF	130-170-0Y		IC412	I.C.		223-261-2
C437	CHIP CERAMIC	0.1UF	130-A60-4Y		Q131	TRANSISTOR		202-095-8Z
C438	ELECT CAPACITOR	10UF	101-025-9		Q401	TRANSISTOR		202-095-8Z
C440	CHIP CERAMIC	15PF	131-511-0Z		Q402	TRANSISTOR		202-095-8Z
C441	CHIP CERAMIC	15PF	131-511-0Z		Q403	TRANSISTOR		202-095-8Z
C442	CHIP CERAMIC	0.047UF	130-424-0Z		Q404	TRANSISTOR		202-095-8Z
C443	CHIP CERAMIC	0.047UF	130-424-0Z		Q405	TRANSISTOR		202-095-8Z
C445	CHIP CERAMIC	0.033UF	130-314-5Z		Q406	TRANSISTOR		202-095-8Z
C446	CHIP CERAMIC	0.033UF	130-314-5Z		Q407	BRT		202-091-4
C447	CHIP CERAMIC	0.033UF	130-314-5Z		Q409	TRANSISTOR		202-095-8Z
C448	CHIP CERAMIC	0.033UF	130-314-5Z		Q504	TRANSISTOR		202-106-5

Page-35-

December 98

Image 39

Contents SM-2000 Page Maxon SM-2000 Mobile Table of ContentsSchematics and Block Diagrams PCB LayoutsSM-2000 Exploded View Specifications Transceiver Nominal PerformanceGeneral Operational Bandwidth BandTransmitter Specfications TX Tone Modulation Characteristics SUB Audible Tones DCSReceiver Reliability Analysis RX Tone Demodulation CharacteristicsAccessories Subaudible tones CTCSS/DCSIntroduction Check the carton carefully for the following items Unpacking InformationGeneral Description Description of Controls Description of ControlsSM-2000 Rear Panel CTCSS/DCS Encoder Circuit Theory of OperationDigital Circuitry CTCSS/DCS Decode CircuitsEeprom PLL RF Section SM-2150/VHF TX VCO RX VCORF Amplifier Out of Lock DetectorPrescaler ReceiverNoise Detect Circuit SQ Board Receiver Audio CircuitLow Pass Filter Audio AmplifierRF Section SM-2450/UHF UHF TransmitterFrequency Synthesizer Circuit Voltage Controlled Oscillator Circuit First MixerSecond Oscillator- Mixer- Limiter and FM Detector Speaker Audio Amplifier Squelch Mute CircuitSquelch Noise Band Pass Filter Noise DetectorTransmit Tests Test SetupPLL Alignment SM-2150/VHF Alignment ProcedureReceiver Alignment RF Discriminator TuningAutomatic Power Adjustment Squelch AdjustmentModulation Deviation Adjustment CTCSS/DCS Deviation AdjustmentAlignment Points Diagram SM-2150/VHF SM-2450/UHF Alignment Procedure Page-28 December ∙ Note Release the PTT button when changing channels Page-30 December Alignment Points Diagram SM-2450/UHF Component Replacement Surface Mount ComponentsSurface Mount Removal Surface Mounted Integrated Circuit Replacement Surface Mount Component ReplacementREF # Description Parts List Common to SM-2000Digital Parts Common on Both VHF & UHF Digital Section REF # Description FRONT-END PCB Assembly Main Board Parts Band ChartPage-38 December Page-39 December Page-40 December Page-41 December SM-2450A UHF Band SM-2450C UHF Band SM-2450D UHF Band SM-2450E UHF Band Band ChartPage-44 December Page-45 December Page-46 December Page-47 December Component Pinout Page-49 December Page-50 December IC409 Voltage Charts SM-2150/VHFPage-52 December Transistor Voltage Chart Voltage Charts SM-2450/UHF IC404 Page-56 December Status Indications & Audible Tones Trouble Shooting Chart SM-2000Page-58 December MMBV109 Replacement Module SchematicsMA-4472 Microphone Schematic Page-61- December Page-62- December Page-63- December Page-64- December SM-2000 Control Head SW5Page-66 December SM-2150/VHF Main Board AssyFront SM-2450/UHF Main Board AssySM-2000 SM-2150/VHF Exploded View Parts List Intentionally Left Blank