Vertex_VX-5500L_serv.pdf

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1、1 Introduction This manual provides technical information necessary for servicing the VX-5500L FM Transceiver. Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified persons to service this equipment may result in permanent damage not covered

2、 by the warranty, and may be illegal in some countries. Two PCB layout diagrams are provided for each double-sided circuit board in the Transceiver. Each side of is referred to by the type of the majority of components installed on that side (“leaded” or “chip-only”). In most cases one side has only

3、 chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic capacitors, ICs, etc.), or leaded components only. While we believe the technical information in this manual to be correct, VERTEX STANDARD assumes no liability for damage that may

4、occur as a result of typographical or other errors that may be present. Your cooperation in pointing out any inconsistencies in the technical information would be appreciated. 2005 VERTEX STANDARD CO., LTD. EC034L90A Service Manual VX-5500L VHF Low-Band FM Transceiver Operating Manual Reprint. 1-1 C

5、loning.2-1 Specifications . 2-2 Exploded View background noise will now be heard, and you may use this to set the VOLUME knob for the desired audio level. Press and hold the MON button more than 1/2 sec- onds to quiet the noise and resume normal (quiet) monitoring. Transmitting To transmit, wait unt

6、il the “BUSY” indicator is off (the channel is not in use), and press the PTT (Push-To-Talk) switch on the side of the micro- phone (the “TX” indicator will appear or the “TX” indicator will glow red). While holding in the PTT switch, speak across the face of the microphone in a clear, normal voice

7、level, and then release the PTT switch to receive. Selecting Groups and Channels ? Press the UP (?) or DOWN (?) button (repeat- edly, if necessary) to select a different group of channels. ? Turn the CHANNEL selector knob to select a different channel within the current group. Automatic Time-Out Tim

8、er If the selected channel has been programmed for automatic time-out, you must limit the length of each transmission. While transmitting, a beep will sound five seconds before time-out. Another beep will sound just before the deadline; the “TX” in- dicator will disappear and transmission will cease

9、 soon thereafter. To resume transmitting, you must release the PTT and wait for the “penalty timer” to expire (if you press the PTT before this timer expires, the timer restarts, and you will have to wait another “penalty” period.) 1-4 Functions Programmable Function Button (PF button) None SCAN (SC

10、N) Dual Watch Call/Reset Talk-Around (TA) Noise Blanker* (NB) Alpha Numeric (A/N) DIMMER (DIM) Emergency (EMG) Horn Alert (HA) Home Channel (HOM) Intercom (IC) Low Power (LOW) GRP UP GRP DWN CH UP CH DWN AUX A AUX B AUX C Public Address (PA) Monitor (MON) RCL Selectable Tone (ST) SP* Squelch Level (

11、SQL) Compander Encryption* (OPT) POWER Operating Manual Reprint ADVANCED OPERATION Programmable Function Button (PF button) The VX-5500 includes the seven Programmable Function Buttons (PF button). The PF button functions can be customized, via programming by your VERTEX STANDARD dealer, to meet you

12、r communications/network requirements. Some features may require the purchase and in- stallation of optional internal accessories. The possible PF button programming features are il- lustrated at the below, and their functions are ex- plained on next page. For further details, contact your VERTEX ST

13、AN- DARD dealer. For future reference, check the box next to each function that has been assigned to the PF button on your particular radio, and keep it handy. 1.5 sec 1.5 sec 1.5 sec 1.5 sec 1.5 sec 1.5 sec 1.5 sec * for VX-5500L * requires RMK-4000 * requires Encryption Unit 1-5 Operating Manual R

14、eprint Channel Scan The Scanning feature is used to monitor multiple signals programmed into the transceiver. While scanning, the transceiver will check each channel for the presence of a signal, and will stop on a channel if a signal is present. To activate scanning: ? Press the assigned PF button

15、of the “Scan” mo- mentarily to activate scanning. ? The scanner will search the channels, looking for active ones; it will pause each time it finds a channel on which someone is speaking. To stop scanning ? Press the assigned PF button of the “Scan”. ? Operation will revert to the channel to which t

16、he CHANNEL selector knob is set. Note:Your dealer may have programmed your radio to stay on one of the following chan- nels if you press the PTT switch during scan- ning pause: ? Current channel (“Talk Back”) ? “Last Busy” channel ? “Priority” channel ? “Home” channel ?Scan Start” channel Dual Watch

17、 The Dual Watch feature is similar to the Scan fea- ture, except that only two channels are monitored: ? The current operating channel; and ? The “Priority” channel. To activate Dual Watch: ? Press the assigned PF button of the “Dual Watch”. ? The scanner will search the two channels; it will pause

18、each time it finds a channel on which someone is speaking. ? Press the assigned PF button of the “Dual Watch”. ? Operation will revert to the channel to which the CHANNEL selector knob is set. ADVANCED OPERATION ARTS (Auto Range Transpond System) This system is designed to inform you when you and an

19、other ARTS-equipped station are within communication range. During ARTS operation, your radio automatically transmits for about 1 second every 25 (or 55) sec- onds (the interval is programmed by Dealer) in an attempt to Shake hands with the other station. If you move out of range for more than one m

20、in- utes, your radio senses that no signal has been received, a ringing beeper will sound. If you sub- sequently move back into range, as soon as the other station transmits, your beeper will sound. The PF Button Function The PF (Programmable Function) button can be programmed by the dealer to provi

21、de two of the other functions described below. To activate the primary Accessory function, press the PF button momentarily. To access the second- ary Accessory function (which may include the Alarm), press and hold the PF button for 1.5 sec- onds or longer. Call/Reset When this feature is programmed

22、 and a selective call has been received, momentarily press the as- signed PF button of the “Call/Reset” to reset the flashing indicator and mute the receiver, other- wise press the assigned PF button of the “Call/ Reset” to sent your radios identification code (ANI) to the dispatcher. Talk-Around Th

23、e feature causes the assigned PF button of the “Talk-Around” to select simplex operation on semi-duplex channels: the transmit frequency becomes the same as the receive frequency (re- gardless of any programmed offset for the chan- nel). Note:This feature has no effect on simplex channels. After pre

24、ssing the button, “-TAKARD-” is displayed on the LCD. Noise Blanker (for VX-5500L) Because local noise can be particularly trouble- some in the VHF Low-Band frequency spectrum, the Low-Band version of the VX-5500 includes a Noise Blanker feature, which may be toggled on and off by pressing the assig

25、ned PF button of the “Noise Blanker” for the appropriate lenght of time. 1-6 Operating Manual Reprint Alpha Numeric Press the assigned PF button of the “Alpha Nu- meric” to switch the display between the Group/ Channel number, and the Group/Channel name (alphanumeric). A tone will sound each time yo

26、u switch between numerical and alphanumerical display. DIM Press the assigned PF button of the “DIM” to ad- just the brightness of the display and key backright. EMG (Emergency) Press the assigned PF button of the “EMG” to initiate an emergency call (requires ANI board). When an emergency call is ma

27、de, not tone is emit- ted and the display does not change. To end the emergency call, turn the transceiver power OFF. HA (Horn Alert) Press the assigned PF button of the “HA” to turn the Horn Alert function ON or OFF. If you receive a call from the base station with 2Tone or DTMF signaling, horn ale

28、rt will activate. When you turn Horn Alert ON, a tone will sound and “ ” appears on the display. Home (Home Channel) Press the assigned PF button of the “Home” to select the pre-programmed Home Channel. Press it again to return to the previous channel. If used while scanning, pressing this key a sec

29、ond time will change to the revert channel. IC (Intercom) This feature requires dual head configuration. Press the assigned PF button of the “IC” to turn the intercom feature ON or OFF. While ON, you can press the PTT switch to communicate to an- other control head operator without transmitting over

30、 the air. When you press this key, a tone sounds and “” appears on the display. The in- tercom can be used even while scanning and re- ceiving a call. Low Power Press the assigned PF button of the “Low Power” to set the radios transmitter to the “Low Power” mode. Press this key again to return to “H

31、igh Power” operation when in difficult terrain. ADVANCED OPERATION GRP UP/DWN Press the assigned PF button of the “GRP UP” or “GRP DWN” to select a different group of chan- nels. CH UP/DWN Press the assigned PF button of the “CH UP” or “CH DWN” to select a different channel within the current group.

32、 AUX A/B/C Press the assigned PF button of the “AUX A”, “AUX B”, or “AUX C” to turn the output port (re- spectively). PA (Public Address) Press the assigned PF button of the “PA” to use the transceiver as a PA amplifier. When you en- able this function, a tone sounds and “” ap- pears on the display.

33、 The public address can be used even while scanning and receiving a call. MONI (Monitor) Press the assigned PF button of the “MONI” mo- mentarily to cancel CTCSS and DCS signaling squelch; the “MON” icon appears on the display. Press and hold this key for 1/2 seconds to hear background noise (unmute

34、 the audio); the MON icon blinks on the display. RCL (Channel Recall) During scan, you can press the assigned PF but- ton of the “RCL” to select the last called channel. ST (Selectable Tone) Press the assigned PF button of the “Selectable Tone”, then rotate the CHANNEL selector knob to select a 2-To

35、ne. SP Press the assigned PF button of the “SP” to switch “Front panel”, “Front panel Requires FIF-7A) MDC1200Digital ANI encoder Unit (Requires FIF-7A) FP-1023External 23A Power Supply MLS-200Mobile Loud speaker (15 W Peak Power) MLS-100Mobile Loud speaker (12 W Peak Power) MMB-75Mobile Mounting Br

36、acket MMB-76Locking Mobile Mounting Bracket FIF-7AInter face Board (for F2D-8, F5D-14, VTP-50, FVP-25) CN-6Inter face Board (for Accessories) LF-1Line Filter 1-9 Operating Manual Reprint DSUB 25-PIN ACCESSORY CONNECTOR Pin 1: RSSI Analog Output A DC voltage proportional to the strength of the signal

37、 currently being received (Receiver Signal Strength Indicator) is provided on this pin. This low impedance output is generated by the receiver IF sub-system and buffered by an internal op- amp. Typical voltages are graphed as follows: DSUB25 output level (V) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0

38、 1259 398125398 12.541.250.4 0.125 0.04 SSG Input Level (uV) DSUB 25-Pin Numbering Pin 2, 3, 4, 5 it then is adjusted for optimum deviation level, and delivered to the next stage. Voice input from the microphone (and CTCSS, if activated) are modulated in the VCO of the synthe- sizer, while DCS audio

39、 is modulated in the reference frequency oscillator of the synthesizer. Synthesizer output, after passing through diode switch D1022 (1SS321), is amplified by drivers Q1004 (2SK3074), Q1002 (2SC1972) and final tran- sistor Q1001 (SD1405) to obtain full RF output. The RF energy then passes through an

40、tenna switch D1033, D1034 and a low-pass filter circuit and final- ly to the antenna connector. RF output power from the final amplifier is sam- pled by D1036 and D1037 (MA729 x 2). The result- ing DC is fed through Automatic Power Controller Q1038 (NJM2902V) to the transmitter RF amplifier, allowin

41、g control of the power output. Generation of spurious products in the transmit- ter is minimized by the fundamental carrier frequen- cy being equal to the final transmitting frequency, modulated directly in the transmit VCO. Additional harmonic suppression is provided by a low-pass fil- ter consisti

42、ng of L1017, L1011, L1012 and C1102, C1088, C1034, C1030, C1029, and C1024, resulting in more than 60dB of harmonic suppression prior to delivery of the RF energy to the antenna. DCS Demodulator DCS signals are demodulated on the MAIN- UNIT, and are applied to low-pass filter Q2040 (NJM2902V), as we

43、ll as the limiter comparator Q2110. CTCSS Encoder/Decoder The CTCSS code is generated and encoded by MPU IC Q2025 (MB90F583B). Demodulation and detection of the CTCSS tones are carried out by IC Q2017 (MX165CDW). MPU Operation is controlled by 16-bit MPU IC Q2025 (MB90F583B). The system clock uses a

44、 16.000 MHz crystal for a time base. IC Q2035 (RN5VL35AA) re- sets the MPU when the power is on, and monitors the voltage of the regulated 5V power supply line. EEPROM The EEPROM Q2036 (AT24C256-10TI2.7) retains TX and RX data for all memory channels and CTCSS data, DCS data, prescaler dividing, and

45、 REF oscilla- tor data (internal/external). 5-1 Alignment The VX-5500 has been carefully aligned at the fac- tory for the specified performance across the frequen- cy range specified for each version. Realignment should therefore not be necessary except in the event of a component failure, or when a

46、ltering the transceiver version. If a sudden prob- lem occurs during normal operation, it is likely due to component failure; realignment should not be done until after the faulty component has been re- placed. All component replacement and service should be performed only by an authorized VERTEX ST

47、ANDARD representative, or the warran- ty policy may be voided. Therefore, if a fault is sus- pected, contact the dealer from whom the transceiv- er was purchased for instructions regarding repair. Authorized VERTEX STANDARD service tech- nicians realign all circuits and make complete per- formance c

48、hecks to ensure compliance with factory specifications after replacing any faulty components. Those who do undertake any of the following align- ments are cautioned to proceed at their own risk. Problems caused by unauthorized attempts at re- alignment are not covered by the warranty policy. Also, V

49、ERTEX STANDARD must reserve the right to change circuits and alignment procedures in the interest of improved performance, without notify- ing owners. Under no circumstances should any alignment be attempted unless the normal function and operation of the transceiver are clearly understood, the cause of the malfunction has been clearly pinpointed and any faulty components replaced, and the need for realignment determined to be absolutely