HYT TC-580 Service Manual
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HYT TC-580 Service Manual

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See also: Owner's Manual
TC-580 Service Manual
Contents
Introduction...................................................................................................................... 1
Safety Information ........................................................................................................... 1
Radio Overview................................................................................................................ 2
Software Specifications .................................................................................................. 5
Circuit Description ........................................................................................................ 13
Cpu Pins ........................................................................................................................ 21
Tc-580 Parts List 1 ........................................................................................................ 25
Adjustment Description ................................................................................................ 40
Troubleshooting Flow Chart ......................................................................................... 50
Disassembly And Assembly For Repair........................................................................ 53
Exploded View ............................................................................................................... 56
Tc-580 Parts List 2 ........................................................................................................ 57
Packing........................................................................................................................... 59
TC-580 PCB View ........................................................................................................... 60
Tc-580 Level Diagram ................................................................................................... 62
Tc-580 Block Diagram................................................................................................... 63
Tc-580 Schematic Diagram .......................................................................................... 64
Specifications ................................................................................................................ 69

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Summary of Contents for HYT TC-580

  • Page 1 Radio Overview........................ 2 Software Specifications ....................5 Circuit Description ......................13 CPU Pins ........................21 TC-580 Parts List 1 ......................25 Adjustment Description ....................40 Troubleshooting Flow Chart ..................50 Disassembly and Assembly for Repair................ 53 Exploded View ....................... 56 TC-580 Parts List 2 ......................

  • Page 2: Introduction

    ◇ This radio shall be serviced by qualified technicians only. ◇ Only use HYT supplied or approved batteries and chargers. ◇ To avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any area where posted notices instruct you to do so. Turn off your radio before boarding an aircraft.

  • Page 3: Radio Overview

    TC-580 Service Manual Radio Overview (3) PTT (4)SK1 (1) Strap Hole (2) Antenna (Push-to-Talk) Key (programmable) (5)SK2 (programmable) (6) LCD Display (7) Function Keypad (8) LED Indicator (10)Radio On-Off/Volume (9) TK (programmable) (11) Microphone (12) Speaker Control Knob (13) Accessory Jack...

  • Page 4: Led Indicator

    TC-580 Service Manual OK key DN key UP key C key ﹡Numeric Keypad Used to enter information for programming the radio. : Used to enter numbers or characters. : Used to enter decimal points or characters. Press OK first and then immediately to lock/unlock the keypad.
  • Page 5 TC-580 Service Manual The LED flashes green once and the power-on Power On (to enter User Mode) alert tone sounds. The LED flashes red, and a low-pitched tone Low Battery Alert sounds every 10 (programmable) seconds. The LED glows red during transmitting.

  • Page 6: Software Specifications

    TC-580 Service Manual Software Specifications Description of Features 256 available channels 32 available zones High /Low power switchable 5 selectable VOX sensitivity levels Channel Scan Bandwidth Switch Home Channel Time-out Timer (TOT) Busy Channel Lockout (transmission prohibited in busy status) 10.

  • Page 7: Description Of Modes

    TC-580 Service Manual 28. Low Battery Alert 29. Battery Save 30. Power-on Password 31. Reset: to restore factory settings 32. Emergency Alarm 33. Software Update Description of Modes User Mode It is a conventional communication mode. After the radio is turned on, it enters the User mode.
  • Page 8 TC-580 Service Manual After the Channel Set mode is entered, you will be required to input the channel number for further menu operation. Level-1 Menu Level-2 Menu (Displayed (Displayed Description for Level-2 Menu Content) Content) CH n RX Freq Displays the RX frequency. Press OK to edit.
  • Page 9 TC-580 Service Manual CH n TX Freq Displays the TX frequency. Press OK to edit. TX Freq 350.00000 Option Items Sets the spacing of the current channel. CH Space Option Items Sets the power level of the current channel. Power Level...
  • Page 10 TC-580 Service Manual Connect two radios using a clone cable. Then hold down SK1 for 2 seconds while powering the source radio on, and the radio enters Clone mode; press the SK2 afterwards to switch to Factory Clone mode. The target radio can be directly turned on to enter the Clone mode. The data transferred covers all data in EEPROM other than serial No, with flag of manual adjustment switch included.
  • Page 11 TC-580 Service Manual...
  • Page 12 TC-580 Service Manual 1. To enter the Manual Tune mode Hold down PTT and SK1 for 2 seconds while powering on the radio. Then the LCD displays "Tuning Mode”, indicating that the Manual Tune mode has been entered. At this time, release the keys.
  • Page 13 TC-580 Service Manual OK to save the current AD sampling value. If neither of SK1 or SK2 is pressed, the tuning value will not be updated, and AD sampling will not be activated. 8. Description of key-press Short press: indicates to press the key for shorter than 1 second;...

  • Page 14: Circuit Description

    TC-580 Service Manual Circuit Description General Realization Method TX Section: The audio signal from MIC is amplitude limited and amplified by U203. After that, the signal feeds to the AGC circuit and then to the baseband processor U202 in AK2347, where the signal is filtered, compressed, pre-emphasized and amplitude limited.
  • Page 15 TC-580 Service Manual supplies power for VCO; under the control of 4.5T, V_SAVE is converted to 4.5R via Q604); the other flow goes to the dual LDO IC (U603), and generates two flows of 3V voltage (3M1 and 3M2), supplying power for MCU/LCD and PLL/U202(AK2347) respectively.
  • Page 16 TC-580 Service Manual VCO: There is a TX VCO and a RX VCO. In TX mode, PLL generates a control voltage via the phase detector and the low-pass filter (LOOP FILTER) to control the varactor, making TX VCO generate the RF carrier signal consistent with the preset frequency of MCU. The modulation signal from U202 (AK2347) and MCU is modulated onto the RF carrier via D108.
  • Page 17 TC-580 Service Manual 3) Block Diagram of RX Low-noise Amplifier and The First Mixer Circuit: Harmonic_LPF ANT_SW TX/RX XF501 Crystal Filter Varactor Varactor IF_AMP 21.7M Tuned Filter Tuned Filter 2SC5108 Q503 Q501 Q502 AT41511 MIXER 3SK318 Figure 1.3 Block Diagram of RX RF Circuit Desired and undesired RF signals received via the antenna feed to the band-pass filter to filter out undesired out-of-band interference signal.
  • Page 18 TC-580 Service Manual The newly generated signal at Q501 is processed by the crystal filter (Z1, Z2 or XF501) to generate the first IF signal (21.7MHz). After amplified by Q505, this IF signal enters the IF demodulator U201, where it will be mixed with the second local oscillator signal to generate the second IF signal (450KHz). Then U201 demodulates this second IF signal and outputs an audio signal which will be sent to AK2347.
  • Page 19 TC-580 Service Manual 2) Signal Processing Circuit VOX_AMP CTC/DCS VOX_DET MOD_VCO Audio & Sub-Audio Processor U203 NJM2904 DTMF/TTS MIC_AMP U202 TDA2822 AK2347 AF_DET U205 S201 Speaker CTC/DCS_DET DTMF_DET APA_EN Q205 OPTIONAL U204 NJM2904 BEEP TTS_DET Figure 1.6 Block Diagram of Baseband Processing TX Baseband Processing The modulation signal from MIC is amplitude limited and amplified by U204.

  • Page 20: Power Supply

    TC-580 Service Manual 4. Power Supply Processing Block diagram of power supply circuit is shown as below: Power Supply LCD_3M1 MCU_3M1 U601 U603 AK2347_3M2 XC6201P XC6401FF PLL_3M2 7.4V VR_4.5V VP_4.5V U602 VT_4.5V POWER_CTRL XC6401FF VCO_4.5V Figure 1.7 Block Diagram of Power Supply Circuit Power Supply Section: The 7.4V battery voltage goes to the LDO U601 and generates a 5V DC voltage,...
  • Page 21 TC-580 Service Manual Figure 1.9 Block Diagram of Display Circuit The radio adopts a LCD of 128*32 pixels, and a keypad of 16 keys which includes 4 function keys and 12 numeric keys. The display circuit is composed of MCU (U611), LCD module, 16-key keypad, LED and other components.

  • Page 22: Cpu Pins

    TC-580 Service Manual CPU Pins Port Pin Name Function Controls the LCD backlight. LCD_BLT H: On. Reserved Reserved EXT_PTT PTT key on the earpiece (valid at high level) VSAVE_CTR Controls the power in Battery Save mode. H: On; L: Off.
  • Page 23 TC-580 Service Manual PA4/DAC_OUT1/SPI 1_NSS/USART2_CK APC/TU For automatic power control/ tune voltage /ADC_IN4 PA5/SPI1_SCK/DAC VRCR Adjusts tolerance of carrier frequencies. _OUT2/ADC_IN5 PA6/SPI1_MISO/AD Controls the TX modulation circuit for BEEP (L: BEEP_MUTE C_IN6/TIM3_CH1 Off; H: On). PA7/SPI1_MOSI/AD Reserved Reserved C_IN7/TIM3_CH2 PC4/ADC_IN14 SQL_DET Detects carrier signals.
  • Page 24 TC-580 Service Manual Clock signal for MB15E03SL PLL clock/ AK2347 PD11 COM_SCLK clock. Data cable for MB15E03SL PLL data/ AK2347 PD12 COM_DATA data. PD13 GLED Green LED (H: On) PD14 RLED Red LED (H: On) PD15 LCD_RS Displays data or options.
  • Page 25 TC-580 Service Manual BOOT0 BOOT0 Input the low level. PB8/TIM4_CH3 Reserved Reserved PB9/TIM4_CH4 Reserved Reserved PE0/TIM4_ETR Reserved Reserved Controls the channel spacing between wide and narrow (L: Narrow; H: Wide.). VSS_3 100 VDD_3...

  • Page 26: Tc-580 Parts List 1

    TC-580 Service Manual TC-580 Parts List 1 TC-580 (350-390MHz) Parts List 1 Part No. Description Qty. Ref No. Print No. 41005801000C0 PCB Board FR4 6L 4P 108.29*46.31*1.20mm C (RoHS) 3801045030130 Ceramic Filter 450KHz±6.0KHz 450F (RoHS) CF201 3099080398000 Chip Resistor 1206 0.39Ω J 1/4W (RoHS) R429 3099080398000 Chip Resistor 1206 0.39Ω...
  • Page 27 TC-580 Service Manual 3101051030020 Chip Capacitor 0.01UF K 25V 0402 (RoHS) C262 3101051030020 Chip Capacitor 0.01UF K 25V 0402 (RoHS) C276 3101051030020 Chip Capacitor 0.01UF K 25V 0402 (RoHS) C414 3101051030020 Chip Capacitor 0.01UF K 25V 0402 (RoHS) C439 3101051030020 Chip Capacitor 0.01UF K 25V 0402 (RoHS) C538 3101051030020 Chip Capacitor 0.01UF K 25V 0402 (RoHS)
  • Page 28 TC-580 Service Manual 3101051040060 Chip Capacitor 0.1UF K 16V 0402 (RoHS) C407 3101051040060 Chip Capacitor 0.1UF K 16V 0402 (RoHS) C413 3101051040060 Chip Capacitor 0.1UF K 16V 0402 (RoHS) C435 3101051040060 Chip Capacitor 0.1UF K 16V 0402 (RoHS) C440 3101051040060 Chip Capacitor 0.1UF K 16V 0402 (RoHS) C514 3101051040060 Chip Capacitor 0.1UF K 16V 0402 (RoHS)
  • Page 29 TC-580 Service Manual 138 3101051020010 Chip Capacitor 1000PF K 50V 0402 (RoHS) C282 139 3101051020010 Chip Capacitor 1000PF K 50V 0402 (RoHS) C404 140 3101051020010 Chip Capacitor 1000PF K 50V 0402 (RoHS) C411 141 3101051020010 Chip Capacitor 1000PF K 50V 0402 (RoHS)
  • Page 30 TC-580 Service Manual 185 3101051010030 Chip Capacitor 100PF J 50V 0402 (RoHS) C712 186 3101051010030 Chip Capacitor 100PF J 50V 0402 (RoHS) C713 187 3101051010030 Chip Capacitor 100PF J 50V 0402 (RoHS) C714 188 3101051010030 Chip Capacitor 100PF J 50V 0402 (RoHS)
  • Page 31 TC-580 Service Manual 231 3101061200000 Chip Capacitor 0603 12PF J 50V (RoHS) C451 232 3001051540000 Chip Resistor 0402 150KΩ F 1/16W (RoHS) R211 233 3001052240000 Chip Resistor 0402 220KΩ F 1/16W (RoHS) R249 234 3001051540000 Chip Resistor 0402 150KΩ F 1/16W (RoHS) R510 235 3001051540000 Chip Resistor 0402 150KΩ...
  • Page 32 TC-580 Service Manual 278 3005051020010 Integrated Resistor 1K J 1/16W -55~+125℃ 4*0402 (RoHS) RN101 279 3005051020010 Integrated Resistor 1K J 1/16W -55~+125℃ 4*0402 (RoHS) RN202 280 3001051050000 Chip Resistor 0402 1MΩ F 1/16W (RoHS) R206 281 3001051050000 Chip Resistor 0402 1MΩ F 1/16W (RoHS) R233 282 3001051050000 Chip Resistor 0402 1MΩ...
  • Page 33 TC-580 Service Manual 325 3001052220010 Chip Resistor 0402 2.2KΩ F 1/16W (RoHS) R204 326 3001052220010 Chip Resistor 0402 2.2KΩ F 1/16W (RoHS) R250 327 3001052220010 Chip Resistor 0402 2.2KΩ F 1/16W (RoHS) R629 328 3101062250000 Chip Capacitor 2.2UF K 10V 0603 (RoHS) C240 329 3101062250000 Chip Capacitor 2.2UF K 10V 0603 (RoHS)
  • Page 34 TC-580 Service Manual 372 3001052230010 Chip Resistor 0402 22KΩ J 1/16W (RoHS) R678 373 3210305220000 Chip Inductor 22nH J 300mA -55~+125℃ 0402 (RoHS) L510 374 3210306220000 Chip Inductor 22nH J 300mA -40~+85℃ 0603 (RoHS) L401 375 3101052200010 Chip Capacitor 22PF J 50V 0402 (RoHS)
  • Page 35 TC-580 Service Manual 419 3001053320000 Chip Resistor 0402 3.3KΩ J 1/16W (RoHS) R134 420 3001053320000 Chip Resistor 0402 3.3KΩ J 1/16W (RoHS) R135 421 3001053320000 Chip Resistor 0402 3.3KΩ J 1/16W (RoHS) R231 422 3001053320000 Chip Resistor 0402 3.3KΩ J 1/16W (RoHS) R245 423 3001053320000 Chip Resistor 0402 3.3KΩ...
  • Page 36 TC-580 Service Manual 466 3101074750000 Chip Capacitor 4.7UF K 16V 0805 (RoHS) C143 467 3101074750000 Chip Capacitor 4.7UF K 16V 0805 (RoHS) C268 468 3104074750070 Tantalum Capacitor 4.7UF M 10V -55~+125℃ P (RoHS) C122 469 3104074750070 Tantalum Capacitor 4.7UF M 10V -55~+125℃ P (RoHS) C153 470 3104074750070 Tantalum Capacitor 4.7UF M 10V -55~+125℃...
  • Page 37 TC-580 Service Manual 513 3001054730000 Chip Resistor 0402 47KΩ J 1/16W (RoHS) R109 514 3001054730000 Chip Resistor 0402 47KΩ J 1/16W (RoHS) R110 515 3001054730000 Chip Resistor 0402 47KΩ J 1/16W (RoHS) R114 516 3001054730000 Chip Resistor 0402 47KΩ J 1/16W (RoHS) R125 517 3001054730000 Chip Resistor 0402 47KΩ...
  • Page 38 TC-580 Service Manual 560 3221507600000 Bead 60Ω 100MHz 3000mA -55~+125℃ 0805 (RoHS) L606 561 3001070000000 Chip Resistor 0805 0Ω J 1/8W -55~+155℃ (RoHS) L608 562 3221506601000 Bead 600Ω 100MHz 500mA -55~+125℃ 0603 (RoHS) L100 563 3221506601000 Bead 600Ω 100MHz 500mA -55~+125℃ 0603 (RoHS) L114 564 3221506601000 Bead 600Ω...
  • Page 39 TC-580 Service Manual 607 3101050900000 Chip Capacitor 0402 9PF B 50V (RoHS) C405 608 3001050000000 Chip Resistor 0402 0Ω J 1/16W (RoHS) C525 609 3101050900000 Chip Capacitor 0402 9PF B 50V (RoHS) C548 610 3101060900010 Chip Capacitor 0603 9PF B 50V (RoHS)
  • Page 40 TC-580 Service Manual 654 3303030300000 Schottky Barrier Diode 40V -40~125℃ (RoHS) D203 655 3504990000010 PA MOSFET VDS:30V ID:600mA VGS(th):1.8V (RoHS) Q402 656 3504990000040 PA MOSFET 10uA 25V 10uA 7.2V 7W 150℃ (RoHS) Q403 657 3610017000070 MCU 32Bit 3V 7.3728MHz -40~80℃ (RoHS) U611 658 3603002005440 IF Processor 455MHz -30~+85℃...

  • Page 41: Adjustment Description

    TC-580 Service Manual Adjustment Description Required Test Instruments Radio communication test set (HP8921) 1 set 10V/3A regulated DC power supply 1 set Digital voltmeter 1 set Ammeter 1 set Preparation Place the board to be tested on the test fixture (please ensure good connection between each test point and the fixture), and connect the board to a power supply.
  • Page 42 TC-580 Service Manual (Note: The Factory Clone Mode option must be checked through the programming software.) 3) Press PTT to begin cloning. During cloning, LED of the source radio glows red, while LED of the target radio glows green. Upon completion of cloning, LED of the source radio solidly glows orange.
  • Page 43 TC-580 Service Manual RX Section SQL Level 1 ON SQL Level 5 ON SQL Level 9 ON SQL Level 1 OFF SQL Level 5 OFF SQL Level 9 OFF RX Low Voltage Threshold Max. RX Volume Bandpass Filter Y indicates frequencies that can be tuned, and the rest are blank Note: channels not available for tuning.
  • Page 44 TC-580 Service Manual sampling. Press SK1 or SK2 after entering the above items, to activate AD sampling (including calculation) once. Press OK to save the current AD sampling value and exit. If neither of SK1 or SK2 is pressed, the tuning value will not be updated, and AD sampling will not be activated.
  • Page 45 TC-580 Service Manual Tuning in the mode Note: Make sure the antenna or load is connected before adjustment. TX group items: go to tune TX items under TX Item menu. Test Adjustment Specifications Item Condition / Remarks Test Instrument Test point...
  • Page 46 TC-580 Service Manual Switch to and enter CDC Dev. WFP1 at low frequency is set 700±50Hz by default. Press SK1/SK2 to Communication Short press UP/DN to tune the CDCSS Test Set Press switch the frequency. Antenna deviation, and press BPF:...
  • Page 47 TC-580 Service Manual Switch to and enter Press SK1/SK2 DTMF Dev. WFP1 at to tune the low frequency is set Communication DTMF 3±0.1kHz by default. Test Set Press deviation, and Short press UP/DN to BPF: Antenna SK1/ press OK to switch the frequency.
  • Page 48 TC-580 Service Manual RX group items: go to tune RX items under RX Item menu. Test Adjustment Specifications / Items Condition Remarks Test Instrument Test point Part Method Switch to and enter Adjust the Check the bandpass BPF Tune. WFP1 at...
  • Page 49 TC-580 Service Manual Tune WFP5 in SQL Squelch level Close5, and then press (Level 5): UP to enter NFP1 at Communication -122dB low frequency. Test Set Antenna Press SSG: -122dBm Refer to the Squelch Earpiece SK1/ MOD: 1KHz above. Refer to method of...
  • Page 50 RX Low Voltage Threshold Max. RX Volume Bandpass Filter Note: The value is subject to that of the source radio. Appendix 2: Reference Value for TC-580 Battery Strength Detection in TX status Green LED glows (70%-100%) >7.46V Duration: 18 minutes Orange LED glows (50%-70%) 7.15V - 7.35V...

  • Page 51: Troubleshooting Flow Chart

    TC-580 Service Manual Troubleshooting Flow Chart TX Section Start No Sound during LED fails to Low TX Power No transmission Replace D609 transmission glow/flash Normal TX Check the TX power supply? power Check the audio path (MIC, D108) LED of D609...
  • Page 52 TC-580 Service Manual RX Section...
  • Page 53 TC-580 Service Manual MCU Section Start Normal power-on alert tone and LCD display? Normal power-on Normal power-on No power-on alert No power-on alert alert tone and LCD alert tone but no tone but normal tone and no LCD display LCD Display...

  • Page 54: Disassembly And Assembly For Repair

    TC-580 Service Manual Disassembly and Assembly for Repair Disassembly 1. Power off the radio at first, and then remove the belt clip, battery and antenna one by one; 2. Disassemble the Chassis in the following steps: 1) Remove the volume control knob in direction of ①...
  • Page 55 TC-580 Service Manual Figure 2 Assembly 1. Assemble the PCB in the following steps: 1) Place the main PCB onto the aluminum chassis in direction of as shown in Figure 3, and use ① nine screws to secure it in direction of ②...
  • Page 56 TC-580 Service Manual 2. Assemble the Chassis in the following steps: 1) Solder two speaker cables to the chassis with an electric iron; 2) Attach the rear cover in direction of ⑨ 3) Insert the chassis into the front case in direction of , and then press the bottom of the chassis;...

  • Page 57: Exploded View

    TC-580 Service Manual Exploded View...

  • Page 58: Tc-580 Parts List 2

    TC-580 Service Manual TC-580 Parts List 2 Material No. Description Qty. (PCS) 6100459000000 Top key 6201739000000 Inner lining for knob 6001018000000 Volume control knob 7209002500000 Antenna nut 6100487000000 Antenna O_Ring 4400100033000 SMA RF connector 7102004000200 Machine screw 6000842100000 Plastic PTT key...
  • Page 59 TC-580 Service Manual 7500324000000 MIC washer 7400055000000 MIC net 6000745000000 Light guide 7206002200200 Nut for volume switch...

  • Page 60: Packing

    TC-580 Service Manual Packing...

  • Page 61: Tc-580 Pcb View

    TC-580 PCB View Top Layer...
  • Page 62 TC-580 PCB View Bottom Layer...

  • Page 63: Tc-580 Level Diagram

    TC-580 Level Diagram Rx Section -120dBm -122dBm -104dBm -108dBm -98dBm -103dBm -80dBm 110mVrms 150mVrms 0.8W C514 C514 C557 C557 C543 C543 Speaker Speaker U202 U205 XF501 U201 C236 C236 C423 C423 C510 C510 C527 C527 C547 C547 C268 C268 Q505...

  • Page 64: Tc-580 Block Diagram

    TC-580 Block Diagram TC-580 SŸ t hFVþ TC-580 BLOCK DIAGRAM PLL System CTC/DCS Power Supply VRCR LCD_3M1 PLL_CLK MCU_3M1 U601 U603 PLL_DATA AK2347_3M2 TCXO 21.25M PLL_EN XC6201P PLL_3M2 XC6401FF U101 Synthesizer 7.4V 7.4V MB15E03 Q103 VCO_BUF BUF_AMP PRE_AMP DRV_AMP Final_AMP VR_4.5V...

  • Page 65: Tc-580 Schematic Diagram

    TC-580 Schematic Diagram AF&IF ) R266 R266 AK_FILTERO R241 R241 C236 C236 4.7K 4.7K BEEP DTMF C264 C264 0.033UF 0.033UF R238 R238 R225 R225 0.1U 0.1U C238 C238 R287 R287 D205 D205 R278 R278 C237 C237 BEEP_MUTE C225 C225 470P...
  • Page 66 TC-580 Schematic Diagram (KEY&LCD) J701 J701 L701 L701 601s 601s Q701 Q701 V_BAT D252 D252 2SA1362 2SA1362 L703 L703 R706 R706 EDZ6.8B EDZ6.8B 601s 601s C614 C614 R702 R702 C702 C702 470P 470P C727 C727 C719 C719 1000P 1000P R720...
  • Page 67 TC-580 Schematic Diagram (MCU&POWERÿ R656 R656 CTC_IN 100K 100K C677 C677 470P 470P KEY_OUT1 KEY_OUT2 TTSI KEY_OUT3 KEY_OUT4 KEY_IN1 TP606 TP606 TP602 TP602 KEY_IN2 KEY_IN3 TP601 TP601 KEY_IN4 TP604 TP604 L610 L610 TP603 TP603 UART_RX 601s 601s UART_TX D251 D251 EDZ6.8B...
  • Page 68 TC-580 Schematic Diagram (RF) L414 L414 C459 C459 ANTENNA ANTENNA L413 L413 C409 C409 C401 C401 R406 R406 C406 C406 R403 R403 D403 D403 C421 C421 C424 C424 C426 C426 C430 C430 C423 C423 C429 C429 10nH 10nH 1.5K 1.5K...
  • Page 69 TC-580 Schematic Diagram (VCO&PLL) V_SAVE Q105 Q105 2SC5343 2SC5343 L118 L118 2nd_LO 601s 601s R120 R120 C151 C151 C154 C154 D109 D109 4.7K 4.7K 0.1U 0.1U C152 C152 1000P 1000P C150 C150 MA2S111 MA2S111 1000P 1000P 470P 470P L116 L116...

  • Page 70: Specifications

    Changes which may occur after publication are highlighted by Revision History contained in Service Manual. No part of this manual may be copied, reproduced, translated, stored in a retrievable system, distributed, or transmitted in any form or by any means, electronic or mechanical, for any purpose without the express written permission of HYT.

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