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VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
International Division
8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A.
VX-900 YAESU EUROPE B.V.
P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
UHF Band
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Service Manual
Unit 5, 20/F., Seaview Centre, 139-141
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Operating Manual Reprint CONTROLS & CONNECTORS ( ) CH Channel Selector LED Indicator Steady Green: Signaling off Blinking Green: Busy Channel (or SQL off) Steady Red: Transmission in Progress Antenna Jack Blinking Red: Battery voltage is low TOP SEL Key VOL/PWR Knob TOGGLE Switch ( ) LCD Liquid Crystal Display Speaker SIDE SEL Key PTT Switch MIC/SP Jack ( ) External MIC/SP MONITOR Button LAMP Button Sub Microphone (Noise Canceling Microphone) 16-Button DTMF Keypad Battery Pack Latch Main Microph
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Operating Manual Reprint BEFORE YOU BEGIN OPERATION Battery Pack Installation and Removal Preliminary Steps To install the battery, hold the transceiver with Install a charged battery r r your left hand, so your palm is over the speaker pack onto the transceiver, as and your thumb is on the top of the belt clip. Care- described previously. fully mate the battery four insertion slots with Screw the supplied antenna r their corresponding alignment tabs on the trans- onto the Antenna jack. ceiver c
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Operating Manual Reprint TOR button twice) to r Switch the top panel’s quiet the noise and re- TOGGLE switch to the sume normal (quiet) [A], [B] or [Center] posi- monitoring. tion to activate one of the pre-programmed func- tions which may have been enabled at the time of programming by the dealer. When this switch To transmit, press and r is in the [A (left)], [B (right)] or [Center] position, hold the PTT switch. the feature programmed (by your dealer) to that Speak into the micro- switch posi
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Operating Manual Reprint ADVANCED OPERATION Soft key and TOGGLE switch Functions ( ) TOGGLE switch Position [ ] [ ] Functions The VX-900 includes the TOP SEL , SIDE SEL , A center B [ ] [ ] MONITOR , and LAMP keys, and the TOGGLE None switch, while the 16-key version additionally pro- Channel Scan [ ] [ ] [ ] [ ] vides A , B , C , D function keys. The Soft key Dual Watch and TOGGLE switch functions can be customized, via programming by your VERTEX STANDARD High/Low Power dealer, to meet your com
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Operating Manual Reprint ADVANCED OPERATION Description of Operating Functions High/Low Power Press the assigned Soft key or switch the Toggle Channel Scan switch to the assigned position to set the radio’s trans- The Scanning feature is used to monitor multiple sig- mitter to the “Low Power” mode, thus extending bat- nals programmed into the transceiver. While scanning, tery life. Press the assigned Soft key again or switch the transceiver will check each channel for the pres- the TOGGLE switch
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Operating Manual Reprint ADVANCED OPERATION possible to talk to the other station. Channel Group Selection The VX-900 is capable of separating its 512 memory Remember that disabling the encryption will mean that your transmissions are no longer secure. Return to the channels into any of 20 Groups. There is no limit as to the number of channels which may be assigned to each encrypted mode as soon as possible, and do not discuss Group. The Dealer will have made the Group assign- any critical or c
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Operating Manual Reprint ADVANCED OPERATION be heard after the last key is pressed (the new code ARTS (Auto Range Transpond System) will now be transmitted). This system is designed to inform you when you and The receiver squelch of the other station will be opened, another ARTS-equipped station are within commu- and you can begin communication. nication range. Speed Dial During ARTS operation, your radio automatically Your Dealer may have pre-programmed Auto-Dial tele- transmits for about 1 sec
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Operating Manual Reprint ACCESSORIES & OPTIONS FVP-25 Encryption/DTMF Pager Unit VH-130 Surveillance Kit (Palm Mic/Earpiece) F2D-8 2-Tone Decode Unit VH-140 DSP VOX Earpiece Microphone F5D-14 5-Tone ENC/DEC Unit VH-150 DSP VOX Headset FNB-V68LI 7.4 V 1800 mAh Lithium-Ion Battery VH-170 Bone Knocker Headset FNB-V69LI 7.4 V 2400 mAh Lithium-Ion Battery CE39 Programing Software FBA-27 Alkaline Battery Case (6 x AA) CT-70 Radio Programing Cable (Requires VPL-1) VAC-900 Rapid Desktop Charger CT-71 PC
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Set (Menu) Mode Functions One or more of the radio’s "Soft Keys" may be en- No.2 LIST (Scanning List) abled for a function associated with the "Set" (Menu) The VX-900 has two scanning "lists:" the "Dealer mode. This feature, when activated, allows the user Scan" list and the "User Scan" list. The "Dealer scan" to customize certain performance aspects of the VX- list is a fixed group of stations which will be included 900. Note that some of these items may also appear when scanning is activated.
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Set (Menu) Mode Functions [SIDE SEL] key to select "P" (PTT Lock), "D" (Dial- No.11 ENCR (Encryption) Knob-Lock), "K" (Keypad Lock), or various combi- On channels where scrambling is used, an incorrect nations of these. Rotate the CH selector knob to save setting of (or failure in) the encryption system at one the new setting, then press the PTT switch to exit end of the communication path will make it impos- sible to talk to the other station. To change the cur- the Set (Menu) mode. rent status
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Cloning The VX-900 includes a convenient “Clone” feature, 5. On the Destination transceiver, press the Moni- which allows the programming data from one trans- tor switch (“LOADING” will appear on the LCD). ceiver to be transferred to another VX-900. Here is 6. Press the PTT switch on the Source transceiver; the procedure for Cloning one radio’s data to an- “SENDING” will appear on the Source transceiv- other. er, and the data transferred. 7. If there is a problem during the cloning process, 1. T
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Specifications GENERAL Number of Channels: 512 channels Frequency Range: 400 - 430 MHz (AS1), 440 - 470 MHz (CS), 450 - 485 MHz (D), 485 - 512 MHz (F) Channel Spacing: 12.5 / 20 / 25 kHz PLL Steps: 5 / 6.25 kHz Power Supply Voltage: 7.4 VDC ± 20 % Battery Life (5-5-90 duty): w/ FNB-V68LI (1800 mAh): 11 hrs. (14 hrs. w/ saver) @5 W w/ FNB-V69LI (2400 mAh): 14 hrs. (18 hrs. w/ saver) @5 W Temperature Range: –22°F to +140°F (–30°C to +60°C) Frequency Stability: EIA: ±2.5 ppm ETS: ±1.5 kHz Case Size
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Exploded View & Miscellaneous Parts RA029850B (Lot. 3~) RA0297600 RA029850A (Lot. 1~) EXT CAP FRONT CASE ASS'Y (16KEY) RA0215400 SHEET À RA0297300 Ç HOOK Ç RA0306900 (x2 pcs) COIL SPRING RA030720A (Lot. 2~) RA0307200 (Lot. 1~) KNOB RA029860B (Lot. 3~) RA0297500 RA029860A (Lot. 1~) RA0317300 RUBBER KNOB FRONT CASE ASS'Y (KEYLESS) RA030770B (Lot. 4~) LIGHT SHEET B M4090153 RA030770A (Lot. 1~) RA0297000 SPEAKER KNOB LATCH PLATE Â RA0296900 RA0317000 HOLDER PLATE SHEET (SP) RA0295300 RA0296600 RA020
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Block Diagram 15
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Block Diagram Note: 16
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Circuit Description ters XF1001 and XF1002 (MDF0028, ±5.5 kHz BW) Overview to strip away all undesired mixer products. The VX-900 is a UHF FM hand-held transceiver de- signed to operate in the frequency range of 400 to IF Amplifier 512 MHz. The first IF signal is amplified by Q1044 (2SC5226- 4/5). Circuit Configuration by Frequency The amplified first IF signal is applied to FM IF sub- The receiver is a double-conversion superhetero- system IC Q1049 (TA31136FN), which contains the dyne with a fi
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Circuit Description The resulting DC squelch control voltage is passed If a CDCSS code is enabled for transmission, the code to pin 19 of the microprocessor Q1050. If no carrier is generated by Q1027 and delivered to D1061 is received, this signal causes pin 6 of Q1052 (HVC350) for CDCSS modulation. (BU2090FS) to go low and pin 89 of Q1050 to go If DTMF is enabled for transmission, the tone is gen- high. Pin 6 of Q1052 signals Q1008 (CPH6102), erated by the microprocessor Q1050 and applied to Q1
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Circuit Description Transmit Inhibit utilizing a 40 or 50 kHz reference signal which is When the Transmit PLL is unlocked, pin 18 of PLL eighth multiple of the channel step size (5, 6.25 or chip Q1053 goes to logic "low." The resulting DC 7.5 kHz). The input signal from pins 5 and 8 of the "unlock" control voltage is passed to pin 20 of mi- PLL IC is divided down to 40 or 50 kHz and com- croprocessor Q1050. While the transmit PLL is un- pared at the phase comparator. The pulsed output locked, pi
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Alignment alignment resulting from use of improper test equip- Introduction ment is not covered under the warranty policy. While The VX-900 is carefully aligned at the factory for most steps do not require all of the equipment listed, the specified performance across the frequency the interactions of some adjustments may require range specified for each version. Realignment that more complex adjustments be performed after- should therefore not be necessary except in the event wards. of a compone
