Sony VX 160V, VX180V Service Manual

VHF FM Transceiver

VX-160V/-180V

Service Manual

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.

YAESU EUROPE B.V.

P.O. Box 75525, 1118 ZN Schiphol, The Netherlands

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K.

VERTEX STANDARD HK LTD.

Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong

VX-160V VX-180V

Introduction

This manual provides technical information necessary for servicing the VX-160V and VX-180V FM Trans-

ceiver.

Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by nonqualified persons to service this equipment may result in permanent damage not covered 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 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 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.

Operating Manual Reprint............................ 2

Cloning .............................................................. 6

Specifications ................................................... 7

Exploded View & Miscellaneous Parts ...... 8

Block Diagram ................................................. 9

Circuit Description ................................11

Alignment .................................................13

Board Unit (

MAIN Unit................................................................ 17

Schematics, Layouts & Parts

)

Operating Manual Reprint

Controls & ConnectorsControls & Connectors

Controls & Connectors

Controls & ConnectorsControls & Connectors

LED Indicator

Glows Green Monitor on Blinking Green Busy Channel (or SQL off) Glows Red Transmitting Blinking Red Battery Voltage is low Blinking Yellow Receiving a Selective Call

Antenna

Push To Talk (

PTT) Switch

Monitor Button

Microphone

Battery Pack Latch

Display Icons & Indicators (VX-180 Only)Display Icons & Indicators (VX-180 Only)

Display Icons & Indicators (VX-180 Only)

Display Icons & Indicators (VX-180 Only)Display Icons & Indicators (VX-180 Only)

CH (Channel) Selector

VOL/PWR Knob

MIC/SP Jack

(

External Mic/Earphone

Speaker

LCD (VX-180)

Soft KEY (VX-180)

Before You BeginBefore You Begin

Before You Begin

Before You BeginBefore You Begin

Battery Pack Installation and Removal

U To install the battery, hold the transceiver with your

left hand, so your palm is over the speaker and your thumb is on the top of the belt clip. Insert the battery pack into the battery compartment on the back of the radio while tilting the Belt Clip outward, then close the Battery Pack Latch until it locks in place with a “Click.”

)

U To remove the battery, turn the radio off and remove

any protective cases. Open the Battery Pack latch on the bottom of the radio, then slide the battery downward and out from the radio while holding the Belt Clip.

Caution!

Do not attempt to open any of the rechargeable NiCd packs, as they could explode if accidentally shortcircuited.

This indicator confirms that D

UAL WATCH is active.

This icon is the “Low Battery” indicator, which appears when the battery voltage becomes too low for proper operation.

This indicator confirms that DUAL 2-TONE DECODE is active.

This indicator confirms that this channel will be skipped during scan.

8 Character Alpha-numeric Invertible Display

Low Battery Indication

U As the battery discharges during use, the voltage gradu-

ally becomes lower. When the battery voltage becomes to low, substitute a freshly charged battery and recharge the depleted pack. The TX/BUSY indicator on the top of the radio will blink red (on the VX-180, the “ icon will appear on the LCD) when the battery voltage is low.

U Avoid recharging Ni-Cd batteries often with little use

between charges, as this can degrade the charge capacity. We recommend that you carry an extra, fullycharged pack with you so the operational battery may be used until depletion (this “deep cycling” technique promotes better long-term battery capacity).

”

OperationOperation

Operation

OperationOperation

Operating Manual Reprint

Preliminary Steps

U Install a charged battery pack onto the transceiver, as

described previously. U Screw the supplied antenna onto the Antenna jack.

Never attempt to operate this transceiver without an

antenna connected. U If you have a Speaker/Microphone, we recommend that

it not be connected until you are familiar with the ba-

sic operation of the VX-160/-180.

Operation Quick Start

U Turn the top panel’s VOL/

PWR knob clockwise to turn

on the radio on.

U Turn the top panel’s CH selec-

tor knob to choose the desired

operating channel.

U Rotate the VOL/PWR knob to

set the volume level. If no sig-

nal is present, press and hold

in the MONITOR key (the

lower button on the left side)

for more than 1 seconds; back-

ground noise will now be heard, and you may use this

to set the VOL/PWR knob for the desired audio level.

U Press and hold in the MONI-

TOR key for more than 1 sec-

onds (or press the MONITOR key twice) to quiet the noise and resume normal (quiet) monitoring.

U To transmit, press and hold in

the PTT switch. Speak into the microphone area of the front panel grille (lower left-hand corner) in a normal voice level. To return to the Receive mode, release the PTT switch.

U If a Speaker/Microphone is available, remove the plas-

tic cap and its two mounting screws from the right side of the transceiver, then insert the plug from the Speaker/ Microphone into the MIC/SP jack; secure the plug using the screws supplied with the Speaker/Microphone. Hold the speaker grille up next to your ear while receiving. To transmit, press the PTT switch on the Speaker/Microphone, just as you would on the main transceiver’s body.

Note: Save the original plastic cap and its mounting

screws. They should be re-installed when not using the Speaker/Microphone.

Key FunctionsKey Functions

Key Functions

Key FunctionsKey Functions

The VX-180 provides programmable [A], [B], and [C] function keys, and both the VX-160 and VX-180 provide programmable MONITOR keys. These “Soft” keys functions can be customized (set to other functions), via programming by your VERTEX STANDARD dealer, to meet your communications/network requirements. Some features may require the purchase and installation of optional internal accessories. The possible Soft key programming features are illustrated at the right, and their functions are explained in the next chapter. For further details, contact your VERTEX STANDARD dealer. For future reference, check the box next to each function that has been assigned to the Soft key on your particular radio, and keep it handy.

Function

None Monitor Low Power Lock* Lamp* Channel Up* Channel Down* Scan Follow-me Scan Dual Watch Talk Around Add/Del* Call/Reset Speed Dial TX Save Off

Soft Key

[A] [B] [C]

MONITOR key

Operating Manual Reprint

Description of Operating FunctionsDescription of Operating Functions

Description of Operating Functions

Description of Operating FunctionsDescription of Operating Functions

Monitor

Press the assigned Soft key momentarily to override (disable) the Tone squelch. Background noise or incoming signals will now be heard whether or not a matching tone is present on the signal). Press and hold in the assigned Soft key for more than 1 seconds to override both the Noise and Tone squelch. Again press and hold in the assigned Soft key for more than 1 seconds (or press the assigned Soft key twice) to resume normal (quiet) Noise and Tone squelch action.

Low Power

Press the assigned Soft key to set the radio's transmitter to the “Low Power” mode, thus extending battery life. Press the assigned Soft key again to return to “High Power” operation when in difficult terrain.

Lock

Press the assigned Soft key to lock the Soft keys (except Lock and Monitor key); thus, the [A], [B], [C], and MONI- TOR keys can be disabled to prevent radio settings from

being disturbed.

Lamp

Press the assigned Soft key to illuminate the LCD for five seconds.

Channel Up

Press the assigned Soft key to switch to a higher operating channel number.

Channel Down

Press the assigned Soft key to switch to a lower operating channel number.

Scan

The Scanning feature is used to monitor multiple channels programmed into the transceiver. While scanning, the radio will check each channel for the presence of a signal, and will stop on a channel if a signal is present. U To activate scanning:

Press the assigned Soft key. The scanner will search the channels, looking for active ones; it will pause each time it finds a channel on which someone is speaking.

U To stop scanning:

Press the assigned Soft key.

Operation will revert to the channel to which the CH knob is set.

Follow-Me Scan

“Follow-Me” Scan feature checks a User-assigned Priority Channel regularly as you scan the other channels. Thus, if only Channels 1, 3, and 5 (of the 8 available channels) are designated for “Scanning,” the user may nonetheless assign Channel as the “User-assigned” Priority Channel via the “Follow-Me” feature. Press the assigned Soft key to activate “Follow-Me” scanning, then turn the CH selector knob to the channel which you want to designate as the “User-Assigned Priority Channel”. When the scanner stops on an “active” channel, the User-assigned Priority Channel will automatically be checked every few seconds.

Dual Watch

The Dual Watch feature is similar to the Scan feature, except that only two channels are monitored: the current operating channel, and the “Priority” channel. U To activate Dual Watch:

Press the assigned Soft key. The scanner will search the two channels; it will pause each time it finds a channel on which someone is speaking.

U To stop Dual Watch:

Press the assigned Soft key. Operation will revert to the channel to which the CH knob is set.

Talk Around

Press the assigned Soft to activate the Talk Around feature when you are operating on duplex channel systems (separate receive and transmit frequencies, utilizing a “repeater” station). The Talk Around feature allows you to bypass the repeater station and talk directly to a station that is nearby. This feature has no effect when you are operating on “Simplex” channels, where the receive and transmit frequencies are already the same. Note that your dealer may have made provision for “Talk Around” channels by programming “repeater” and “Talk Around” frequencies on two adjacent channels. If so, the key may be used for one of the other Pre-Programmed Functions.

Add/Del

The Add/Del feature allows the user to arrange a custom Scan. Press the assigned Soft key to delete/restore the current channel to/from your scanning list. When you delete a current channel, “SKIP” will appear on the LCD after pressing the Soft key. When you restore a current channel, “SKIP” indicator on the LCD will turn off.

Operating Manual Reprint

Description of Operating FunctionsDescription of Operating Functions

Description of Operating Functions

Description of Operating FunctionsDescription of Operating Functions

Call/Reset

When the 2-tone selective calling unit is installed, press the assigned Soft key to silence the receiver and reset for another call, when a communication is finished.

Speed Dial

Your Dealer may have pre-programmed Auto-Dial telephone number memories into your radio. To dial a number, just press the Dealer-assigned Soft key for Speed Dialing. The DTMF tones sent during the dialing sequence will be heard in the speaker.

Accessories & OptionsAccessories & Options

Accessories & Options

Accessories & OptionsAccessories & Options

FNB-64 7.2 V 700 mAh Ni-Cd Battery FNB-V57 7.2 V 1100 mAh Ni-Cd Battery FBA-25A Alkaline Battery Case NC-77B 120 VAC Overnight Desktop Charger NC-77C 230-240 VAC Overnight Desktop Charger VAC-800 Desktop Rapid Charger VAC-6800 6-unit Multi Charger MH-45 MH-37 VC-25 VOX Headset VCM-1 Mobile Mounting Bracket (for VAC-800) LCC-160/S Leather Case (for VX-160) LCC-180/S Leather Case (for VX-180) CT-42 PC Programming Cable CT-27 Radio to Radio Programming Cable CE44 Programming Software

B4B

Speaker/Microphone

A4B

Earpiece Microphone

TX Save Off

Press the assigned Soft key to disable the Transmit Battery Saver, if you are operating in a location where high power is almost always needed. The Transmit Battery Saver helps extend battery life by reducing transmit power when a very strong signal from an apparently nearby station is being received. Under some circumstances, though, your hand-held radio may not be heard well at the other end of the communication path, and high power may be necessary at all times.

Cloning

The VX-160/-180 includes a convenient Cloning feature, which allows the programming data from one transceiver to be transferred to another VX-160/-180. Here is the procedure for Cloning one radio's data to another.

1. Turn both transceivers off.

2. Remove the plastic cap and its two mounting screws

from the MIC/SP jack on the right side of the transceiver. Do this for both transceivers.

3. Connect the optional CT-27 cloning cable between the MIC/SP jacks of the two transceivers.

4. Press and hold in the PTT and MONITOR switches (just below the PTT switch) while turning the transceiver on. Do this for both transceivers (the order of the switch-on does not matter). “ on the displays (for the VX-180) of both transceivers when Clone mode is successfully activated in this step; in the case of the VX-160, no change will be observed at this point.

5. On the Destination transceiver, press the MONITOR switch. “ 180; for VX-160, the TX/BUSY indicator on the top of the radio will glow Green).

LOADINGLOADING

LOADING” will appear on the LCD (for VX-

LOADINGLOADING

CLONECLONE

CLONE” will appear

CLONECLONE

6. Press the PTT switch on the source transceiver; “

INGING

ING” will appear on the Source transceiver (for VX-

INGING

180; for VX-160, the TX/BUSY indicator on the top of the radio will glow Red), and the data will be transferred.

7. If there is a problem during the cloning process, “

RORROR

ROR” will appear on the LCD (for VX-180; for VX-

RORROR

160, the TX/BUSY indicator on the top of the radio will blink Red); check your cable connections and battery voltage, and try again.

8. If the data transfer is successful, the display will return

CLONECLONE

to “

CLONE” (for VX-180; for VX-160, the TX/BUSY

CLONECLONE

indicator on the top of the radio will turn off). Turn both transceivers off and disconnect the CT-27 cable. You can then turn the transceivers back on, and begin normal operation.

9. Replace the plastic cap and its two mounting screws.

SEND-SEND-

SEND-

SEND-SEND-

ER-ER-

ER-

ER-ER-

Optional Cloning Cable CT-27

Specifications

GENERAL Specifications

Frequency Range (MHz): 134 - 160 (TYP A)

146 - 174 (TYP C) 142 - 176 (TYP CS1)

Number of Channels: 16 channels Channel Spacing: 12.5 / 25 kHz (15 / 30 kHz) PLL Steps 2.5 / 6.25 kHz Power Supply voltage: 7.5 VDC ± 20% Operating Temperature Range: –22°F to +140°F (–30°C to +60°C) Frequency Stability: ±2.5 ppm Dimensions (WHD): 2.3" (W) x 4.7" (H) x 1.2" (D) (58 x 120 x 31 mm) Weight (approx.): 0.81 lb. (365 g) w/FNB-64

RECEIVER Specifications (Measurements made per EIA standard TIA/EIA-603)

Sensitivity

EIA 12 dB SINAD : 0.20 µV 20 dB Quieting : 0.30 µV

Adjacent channel selectivity: 65 dB (25 kHz) / 60 dB (12.5 kHz) Intermodulation: 65 dB Spurious and Image Rejection: 65 dB Hum & Noise 45 dB Audio output: 500 mW @4 Ohms, 5% THD

TRANSMITTER Specifications (Measurements made per EIA standard TIA/EIA-603)

Power output: 5.0 / 1.0 W Modulation: 16K0F3E, 11K0F3E Conducted Spurious Emissions: 60 dB Below Carrier FM Hum & Noise: 40 dB (25 kHz) / 35 dB (12.5 kHz) Audio distortion (@ 1 kHz): < 5 %

Measurements per EIA standards unless noted above. Specifications subject to change without notice or obligation.

Exploded View & Miscellaneous Parts

RA0173500 CAP



R6147510 RING NUT (x 2 pcs)

RA0296100 VOLUME KNOB

RA029620A (Lot. 3~) RA0296200 (Lot. 1~2) KNOB (CH)

RA0351700 TERMINAL PLATE (+)

RA010340B (Lot. 28~) RA010340A (Lot. 1~27) TERMINAL HOLDER

RA0351600 TERMINAL PLATE (-)

RA0210600 RUBBER PACKING (x 2 pcs)

RA0334900 REFLECTOR SHEET (VX-180)

RA0294800 INTER CONNECTOR (VX-180)

RA0309800 (Lot. 20~) MYLAR SHEET (SP)

G6090139 LCD (VX-180)







RA0294400 LCD HOLDER (VX-180)

RA029450B (Lot. 76~) RA029450A (Lot. 10~75) RA0294500 LIGHT GUIDE (VX-180)



RA0110200



HOLDER RUBBER

CP8266003 (VTX: Lot. 102~) CP8266004 (EXP: Lot. 102~) RA029600C (Lot. 56~101) RA029600B (Lot. 28~55) RA029600A (Lot. 17~27) RA0296000 (Lot. 1~16) FRONT CASE ASSY (VX-160)

RA021100B (Lot. 10~) RA021100A (Lot. 1~9) DOUBLE FACE TAPE

MAIN Unit

RA055770B (Lot. 98~) LATCH NAIL C RA0123500 (Lot. 1~97) LATCH NAIL B

RA0210900 WINDOW

RA0293900 RUBBER KNOB

CP8266002 (VTX: Lot 102~) CP8266006 (EXP: Lot 102~) RA029590D (Lot. 54~101) RA029590C (Lot. 28~53) RA029590B (Lot. 17~27) RA0295900 (Lot. 1~16) FRONT CASE ASSY (VX-180) (w/WINDOW, DOUBLE FACE TAPE)

RA029430A (Lot. 4~) RA0294300 (Lot. 1~3) RUBBER PACKING

P1091034A CONNECTOR SMA/BR-1

CAUTION











CP7064001 BELT CLIP ASSY

CP8264001 (Lot. 96~) RA029310D (Lot. 26~96) RA029310C (Lot. 20~25) RA029310B (Lot. 11~19) RA029310A (Lot. 3~10) RA0293100 (Lot. 1~2) REAR CASE ASSY (w/SMA CONNECTOR, TERMINAL PLATE (-), PAN HEAD SCREW M2X3NI)

REF. VXSTD P/N Description Qty.

 U44104002 TAPTITE SCREW M2X4NI 10

U44104002



(VX-180V)

TAPTITE SCREW M2X4NI 2

 U20206007 BINDING HEAD SCREW M2.6X6B 2

 U24110002 TAPTITE SCREW M2X10NI 2

 U02206007 SEMS SCREW SM2.6X6B 2

 U00103002 PAN HEAD SCREW M2X3NI 1

Block Diagram

Note:

Circuit Description

Receive Signal Path

Incoming RF from the antenna jack is delivered to the RF Unit and passes through a low-pass filter consisting of coils L1001, L1002, and L1031, capacitors C1004, C1005, C1008, C1010, C1014, C1016, and C1221, and antenna switching diode D1003 (RLS135 TE-17).

Signals within the frequency range of the transceiver enter a varactor-tuned band-pass filter consisting of coils L1010 and L1011, capacitors C1044, C1046, C1060, C1065, and C1068, and diodes D1011, D1012, D1013, and D1014 (all HVC358B), then are amplified by Q1012 (2SC5006-T1) and enter a varactor-tuned band-pass filter consisting of coils L1017 and L1021, capacitors C1084, C1086, C1095, and C1097, and diodes D1018, D1019 (both HVC358B), before mixing by first mixer Q1026 (SGM2016AM-T7).

Buffered output from the VCO is amplified by Q1007 (2SC5005-T1) to provide a pure first local signal between

190.25 and 218.25 MHz for injection to the first mixer. The 44.25 MHz first mixer product then passes through monolithic crystal filter XF1002 (typ A, C:HDF0042, 5.5 kHz BW or typ CS1:HDF0051) to strip away unwanted mixer products, and the IF signal is then amplified by Q1033 (2SC4215Y TE85R).

The amplified first IF signal is applied to FM IF subsystem IC Q1037 (TA31136FN-EL), which contains the second mixer, second local oscillator, limiter amplifier, noise amplifier, and RSSI amplifier.

The second local signal is produced from the PLL reference/second local oscillator of 14.60 MHz crystal X1001. The 14.60 MHz reference signal is tripled by Q1036, capacitor C1209, and coil L1029, and the resulting 43.8 MHz second local signal is then delivered to the mixer section of Q1037, which produces the 450 kHz second IF when mixed with the first IF signal.

The second IF then passes through ceramic filter CF1001 (ALFYM450G=K on “Narrow” channels) or CF1002 (ALFYM450F=K on “Wide” channels) to strip away all but the desired signal, and then is applied to the limiter amplifier in Q1037, which removes amplitude variations in the 450 kHz IF, before detection of the speech by the ceramic discriminator, CD1001 (CDBC450CX24).

Detected audio from Q1037 is applied to the audio highpass filter, and then passes via the volume control to the audio amplifier Q1039 (NJM2070M-TE2), which provides up to 1/2 Watt to the optional headphone jack or a 4ohm loudspeaker.

Squelch Control

The squelch circuitry consists of a noise amplifier and

band-pass filter within Q1037, and noise detector D1018 (HVC358B).

When no carrier is received, noise at the output of the detector stage in Q1037 is amplified and band-pass filtered by the noise amplifier section of Q1037 and the network between pins 7 and 8, and then is rectified by D1028.

The resulting DC squelch control voltage is passed to pin 37 of the microprocessor Q1014 (M37516E6HP:Lot. 1~4, M37516M6:Lot. 5~). If no carrier is received, this signal causes pin 24 of Q1014 to go high and pin 20 to go high. Pin 24 signals Q1060 (RT1P441U-T11-1) to disable the supply voltage to the audio amplifier Q1039, while pin 20 holds the green (Busy) half of the LED off, when pin 24 is high and pin 20 is high.

Thus, the microprocessor blocks output from the audio amplifier, and silences the receiver, while no signal is being received (and during transmission, as well).

When a carrier appears at the discriminator, noise is removed from the output, causing pin 37 of Q1014 to go low and the microprocessor to activate the “Busy” LED via Q1014.

The microprocessor then checks for CTCSS or CDCSS code squelch information, if enabled. If not transmitting and CTCSS or CDCSS is not activated, or if the received tone or code matches that programmed, audio is allowed to pass through the audio amplifier Q1039 (NJM2070M TE2) to the loudspeaker by the enabling of the supply voltage to it via Q1037.

Transmit Signal Path

Speech input from the microphone is amplified by Q1017 (NJM2902V TE1); and R1054, the audio is amplified in another section of Q1017.

The processed audio may then be mixed with a CTCSS tone generated by Q1014 (M37516E6HP:Lot. 1~4, M37516M6:Lot. 5~) for frequency modulation of the PLL carrier (up to ±5 kHz from the unmodulated carrier) at the transmitting frequency.

If a CDCSS code is enabled for transmission, the code is generated by microprocessor Q1014 (M37516E6HP:Lot. 1~4, M37516M6:Lot. 5~) and delivered to D1004 (HVC350B TRF) for CDCSS modulating.

The modulated signal from the VCO Q1002 (2SC5231C8-TL) is buffered by Q1007 (2SC5005-T1). The low-level transmit signal then passes through the T/R switching diode D1016 (DAN235E-TL) to driver amplifiers Q1015 (2SC5227-4-TB) and Q1016 (2SK2596BXTL), then the amplified transmit signal is applied to the final amplifier Q1024 (2SK2974-T11), which delivers up to 5 watts of output power.

The transmit signal then passes through the antenna switch D1003 (RLS135 TE-11) and is low-pass filtered, to suppress harmonic spurious radiation, before delivery to the antenna.

after pre-emphasis by C1066

Circuit Description

Automatic Transmit Power Control

Current from the final amplifier is sampled by R1108, R1115, and R1125, and is rectified by Q1057 (IMZ2A T108). The resulting DC is fed back through Q1032 (FMW1 T98) to the drive amplifier Q1016 and final amplifier Q1024, for control of the power output. The microprocessor selects “High” or “Low” power levels.

Transmit Inhibit

When the transmit PLL is unlocked, pin 7 of PLL chip

Q1005 goes to a logic “Low,” and unlock detector Q1056 (2SA1586Y TE85R) goes to a logic “High.” The resulting DC unlock control voltage is passed to pin 14 of the microprocessor, Q1014. While the transmit PLL is unlocked, pin 22 of Q1014 remains high, which then turns off Q1029 (CPH6102-TL) and the Automatic Power Controller Q1032 (FMW1 T98) to disable the supply voltage to the drive amplifiers Q1015/Q1016 and final amplifier Q1024, thereby disabling the transmitter.

Spurious Suppression

Generation of spurious products by the transmitter is minimized by the fundamental carrier frequency being equal to final transmitting frequency, modulated directly in the transmit VCO. Additional harmonic suppression is provided by a low-pass filter consisting of coils L1001, L1002, and L1031 plus capacitors C1004, C1005, C1008, C1010, C1014, C1016, and C1221, resulting in more than 60 dB of harmonic suppression prior to delivery of the RF signal to the antenna.

PLL Frequency Synthesizer

The PLL circuitry on the Main Unit consists of VCO Q1002 (2SC5231C8-TL), VCO buffer Q1007 (2SC5005), and PLL subsystem IC Q1005 (MB15A02PFV1-G-BND-EF), which contains a reference divider, serial-to-parallel data latch, programmable divider, phase comparator, and charge pump.

Frequency stability is maintained by temperature compensating thermistor TH1004. The output from TH1004 is applied to pin 39 of Q1014. Q1014 outputs thermal data to D/A converter Q1052 (M62364FP 600D), which produces a DC voltage corresponding to the thermal data. The resulting DC voltage is applied to varactor diode D1004 (HVC350B TRF) to stabilize the 14.60 MHz Reference Frequency.

While receiving, VCO Q1002 oscillates between

190.25 and 218.25 MHz according to the transceiver version and the programmed receiving frequency. The VCO output is buffered by Q1007, then applied to the prescaler section of Q1005. There the VCO signal is divided by 64 or 65, according to a control signal from the data latch section of Q1005, before being sent to the programmable divider section of Q1005.

The data latch section of Q1005 also receives serial dividing data from the microprocessor, Q1014, which causes the pre-divided VCO signal to be further divided in the programmable divider section, depending upon the desired receive frequency, so as to produce a 2.5 kHz or

3.125 kHz derivative of the current VCO frequency.

Meanwhile, the reference divider section of Q1005 divides the 14.60 MHz crystal reference (from the reference oscillator, Q1022) by 5840 (or 4672) to produce the

2.5 kHz (or 3.125 kHz) loop references (respectively).

The 2.5 kHz (or 3.125 kHz) signal from the programmable divider (derived from the VCO) and that derived from the reference oscillator are applied to the phase detector section of Q1004, which produces a pulsed output with pulse duration depending on the phase difference between the input signals.

This pulse train is filtered to DC and returned to the varactor D1037 and D1042 (both, typ A, C:HVC358B or typ CS1:1SV305). Changes in the level of the DC voltage are applied to the varactor, affecting the reference in the tank circuit of the VCO according to the phase difference between the signals derived from the VCO and the crystal reference oscillator.

The VCO is thus phase-locked to the crystal reference oscillator. The output of the VCO Q1002, after buffering by Q1007, is applied to the first mixer as described previously.

For transmission, the VCO Q1002 oscillates between 146 and 174 MHz according to the model version and programmed transmit frequency. The remainder of the PLL circuitry is shared with the receiver. However, the dividing data from the microprocessor is such that the VCO frequency is at the actual transmit frequency (rather than offset for IFs, as in the receiving case). Also, the VCO is modulated by the speech audio applied to D1005 (typ A:HVU358 TRF, typ C:1SV229 TPH3, typ CS1:1SV229 TPH3:Lot. 45~, HVU358 TRF:Lot. 54~), as described previously.

Receive and transmit buses select which VCO is made active, using Q1059 and Q1063 (both RT1P441U-T11-

1).

Miscellaneous Circuits

Push-To-Talk Transmit Activation

The PTT switch on the microphone is connected to pin 48 of microprocessor Q1014, so that when the PTT switch is closed, pin 23 of Q1014 goes low. This signal disables the receiver by disabling the 5 V supply bus at Q1036 (DTB123EK T146) to the front-end, FM IF subsystem IC Q1037, and the receiver VCO circuitry.

At the same time, Q1027 (FMW1 T98) and Q1029 (CPH6102-TL) activate the transmit 5V supply line to enable the transmitter.

Alignment

Introduction

The VX-160/-180 has been aligned at the factory for

the specified performance across the entire frequency range specified. Realignment should therefore not be necessary except in the event of a component failure. All component replacement and service should be performed only by an authorized Vertex Standard representative, or the warranty policy may be voided.

The following procedures cover the sometimes critical and tedious adjustments that are not normally required once the transceiver has left the factory. However, if damage occurs and some parts are replaced, realignment may be required. If a sudden problem occurs during normal operation, it is likely due to component failure; realignment should not be done until after the faulty component has been replaced.

We recommend that servicing be performed only by authorized Vertex Standard service technicians who are experienced with the circuitry and fully equipped for repair and alignment. Therefore, if a fault is suspected, contact the dealer from whom the transceiver was purchased for instructions regarding repair. Authorized Vertex Standard service technicians realign all circuits and make complete performance checks to ensure compliance with factory specifications after replacing any faulty components. Those who do undertake any of the following alignments are cautioned to proceed at their own risk. Problems caused by unauthorized attempts at realignment are not covered by the warranty policy. Also, Vertex Standard must reserve the right to change circuits and alignment procedures in the interest of improved performance, without notifying 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 necessary. The following test equipment (and thorough familiarity with its correct use) is necessary for complete realignment. Correction of problems caused by misalignment resulting from use of improper test equipment is not covered under the warranty policy. While most steps do not require all of the equipment listed, the interactions of some adjustments may require that more complex adjustments be performed afterwards. Do not attempt to perform only a single step unless it is clearly isolated electrically from all other steps. Have all test equipment ready before beginning, and follow all of the steps in a section in the order presented.

Required Test Equipment

U Avionics Radio Tester with calibrated output level at

500 MHz

U In-line Wattmeter with 5% accuracy at 500 MHz U 50-ohm, 10-W RF Dummy Load U Regulated DC Power Supply (standard 7.5V DC, 2A) U Frequency Counter: ±0.2 ppm accuracy at 500 MHz U AF Signal Generator U AC Voltmeter U DC Voltmeter U UHF Sampling Coupler U IBM PC/compatible Computer with Microsoft DOS

v3.0 or later operating system

U Vertex Standard CT-42 Connection Cable and CE44

Alignment program

Alignment Preparation & Precautions

A 50-ohm RF Dummy load and in-line wattmeter must be connected to the main antenna jack in all procedures that call for transmission, except where specified otherwise. Correct alignment is not possible with an antenna.

After completing one step, read the following step to determine whether the same test equipment will be required. If not, remove the test equipment (except dummy load and wattmeter, if connected) before proceeding.

Correct alignment requires that the ambient temperature be the same as that of the transceiver and test equipment, and that this temperature be held constant between 20° and 30°C (68°~ 86°F). When the transceiver is brought into the shop from hot or cold air, it should be allowed time to come to room temperature before alignment.

Whenever possible, alignments should be made with oscillator shields and circuit boards firmly affixed in place. Also, the test equipment must be thoroughly warmed up before beginning.

Note:Signal levels in dB referred to in this procedure are

based on 0 dBµ = 0.5 µV (closed circuit).

Important Note

When connecting the CT-42 plug into the MIC/SP jack of the VX-160/-180, you must remove the plastic cap and its mounting screws prior to programming. Please remember to re-attach the cap and screws when the programming is complete.

Alignment

Set up the test equipment as shown below for transceiver alignment, and apply 7.5V DC power to the transceiver.

50-ohm

Dummy Load

RF Signal

Generator

Inline Wattmeter

Deviation Meter

Frequency

Counter

RF Sampling

Coupler

CT-42 connection Cable

COM port

MIC/SP

Transceiver

Power Supply

7.5V DC

The transceiver must be programmed for use in the intended system before alignment is attempted. The RF parameters are loaded from the file during the alignment process.

In order to facilitate alignment over the complete operating rang of the equipment, it is recommended that the channel data in the transceiver be preset as per the chart below.

Channels

Low Band Edge 134.000 146.000 142.000

(Channel 1) (Low POWER) (Low POWER) (Low POWER)

Band Center 147.000 160.000 159.000

(Channel 2) (High POWER) (High POWER) (High POWER)

High Band Edge 160.000 174.000 176.000

(Channel 3) (High POWER) (High POWER) (High POWER)

Tone-Frequency (Hz) / DCS-code

Channel

CTCSS

Low Band Edge

(Channel 1)

Band Center

(Channel 2)

High Band Edge

(Channel 3)

––––––

151.4 – 151.4 – 151.4 –

– 627 – 627 – 627

Frequency (MHz)

Ver. A Ver. C Ver. CS1

DCS

CTCSS

DCS

CTCSS

DCS

The alignment tool outline

Installation of the Alignment tool

The “alignment mode” is a software-based protocol, accessed by an “Alignment Mode” command from the computer while switching the transceiver on.It is operated by the alignment tool automatically. During use of the alignment mode, normal operation is suspended. The alignment tool program provides all needed operation capability.

The alignment tool consists of an executable file “CE44.exe” and an accmpanying configuration file “CE44.cfg” which should be loaded per standard DOS procedures. Create a suitable directory, then copy these foles from the distribution diskette into the new directory.

For example, if copying the file from Drive A, use the following DOS command sequence:

c:\ mkdir align [enter] c:\ cd align [enter] c:\ align\ copy a:ce44.*

No further installation steps are required. If you wish to utilize a different name for the alignment directory, it will not matter to the executable file.

Booting the Alignment Tool

Change to the “align” directory (or the directory name you utilized in the previous section). Now type on the command line: ce44

The introductory screen will appear, and you may press any key to enter the main screen.

Entering Alignment Mode

To enter the alignment mode, turn the transceiver off, Select “Radio” then “Adjust” parameter. Now, turn the transceiver back on. When the command has been successful, a message on the computer screen will confirm that the transceiver is now in the “Alignment” mode.

Alignment Sequence

Although the data displayed on the computer's screen during alignment is temporary data, it is important you follow the basic alignment sequence precisely, so that the displayed data and the data loaded into the transceiver are identical.

Basic Alignment Sequence

1. Enter the alignment mode

2. Upload data from transceiver

3. Align data

4. Download data to transceiver

ENTER to boot the alignment tool.

Alignment

PLL VCV (Varactor Control Voltage)

U Connect the DC voltmeter between TP3 on the Main

Unit and ground.

U Set the transceiver to CH 3 (high band edge), and ad-

just L1004 on the Main Unit for 3.7~3.8 V (Typ C),

3.0~3.1 V (Typ CS1) or 3.4~3.5 V (Typ A) on the DC voltmeter.

Transmitter Output Power

High Power

U Set the transceiver to CH 2 (band center). U Open the “

select the “

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the power meter reading is 5.5 W ± 0.1 W (Typ C, CS1) or

5.0 W ± 0.1 W (Typ A). Confirm that the current consumption is 2.2 A or lower.

U Press the [ENTER] key to lock in the new data.

Low Power

U Set the transceiver to CH 1 (Low band edge). U Open the “

select the “

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the power meter reading is 1.0 W ± 0.1 W (for “RF Power Low”). Confirm that the current consumption is 1.0 A or lower.

U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on the CE44 program, then

AdjustAdjust

RF Power (High)RF Power (High)

RF Power (High)” parameter.

RF Power (High)RF Power (High)

AdjustAdjust

Adjust” window on the CE44 program, then

AdjustAdjust

RF Power (Low)RF Power (Low)

RF Power (Low)” parameter.

RF Power (Low)RF Power (Low)

MIC Sensitivity

U Set the transceiver to CH 2 (band center). U Inject a 1 kHz tone at –37 dBm to the MIC jack.

CLONE GND

U Open the “

MIC SensitivityMIC Sensitivity

“

MIC Sensitivity” parameter.

MIC SensitivityMIC Sensitivity

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the deviation meter reading is ±3.0 kHz (±0.1 kHz) (for 25 kHz steps) deviation.

U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on CE44, then select the

AdjustAdjust

L1004TP3

Alignment

MAX Deviation

U Set the transceiver to CH 2 (band center). U Inject a 1 kHz tone at –17 dBm to the MIC jack. U Open the “

MAX DeviationMAX Deviation

“

MAX Deviation” parameter.

MAX DeviationMAX Deviation

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the deviation meter reading is ±4.2 kHz (±0.1 kHz) (for 25 kHz steps, Typ A, C), ±4.3 kHz (±0.1 kHz) (for 25 kHz steps, Typ CS1) or ±2.1 kHz (±0.1 kHz) (for 12.5 kHz steps) deviation.

U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on CE44, then select the

AdjustAdjust

CTCSS Deviation

U Set the transceiver to CH 2 (band center). U Open the “

CTCSS DeviationCTCSS Deviation

“

CTCSS Deviation” parameter.

CTCSS DeviationCTCSS Deviation

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the deviation meter reading is ±0.7 kHz (±0.1 kHz) (for 25 kHz steps, Typ C, A), ±0.9 kHz (±0.1 kHz) (for 25 kHz steps, Typ CS1) or ±0.35 kHz (±0.1 kHz) (for 12.5 kHz steps, Typ C, A), ±0.5 kHz (±0.1 kHz) (for 12.5 kHz steps, Typ CS1)deviation.

U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on CE44, then select the

AdjustAdjust

RF Frequency

U Set the transceiver to CH 2 (band center). U Open the “

RF FrequencyRF Frequency

“

RF Frequency” parameter.

RF FrequencyRF Frequency

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the

frequency counter displays the band center frequency

(±100 Hz) for the version being aligned. U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on CE44, then select the

AdjustAdjust

Sensitivity

U Set the transceiver to CH 3 (high band edge, Typ C, A)

or CH 1 (low band edge, Typ CS1). U Tune the RF signal generator to the same frequency as

the transceiver’s, then set the generator output level to

40 dBµ with ±3.0 kHz deviation @ 1 kHz tone modu-

lation. U Open the “

RX TuneRX Tune

“

RX Tune” parameter.

RX TuneRX Tune

U Press the [ENTER] key to enable programming of this

parameter. Use the [] or [] arrow keys to tune for

best sensitivity; ultimately, the radio should be aligned

so that the RF signal generator output level is –6 dBµ

EMF (0.25 µV) or less for 12 dB SINAD. U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on CE44, then select the

AdjustAdjust

DCS Deviation

U Set the transceiver to CH 3 (high band edge). U Open the “

DCS DeviationDCS Deviation

“

DCS Deviation” parameter.

DCS DeviationDCS Deviation

U Press the [ENTER] key to enable programming of this

parameter; use the [] or [] arrow keys so that the deviation meter reading is ±0.75 kHz (±0.1 kHz) (for 25 kHz steps) or ±0.35 kHz (±0.1 kHz) (for 12.5 kHz steps) deviation.

U Press the [ENTER] key to lock in the new data.

AdjustAdjust

Adjust” window on CE44, then select the

AdjustAdjust

Circuit Diagram

SQL Open:0.73V SQL Close:0.74V

SQL Open:2.78V SQL Close:2.78V

SQL Open:0.0V SQL Close:0.0V

SQL Open:1.97V SQL Close:1.97V

MAIN Unit (Lot. 1~2)

2.76V (2.80V)

4.19V (0.0V)

0.0V (4.21V)

3.91V (3.91V)

4.21V (4.26V)

0.0V (4.21V)

0.0V (0.0V)

2.17V

(2.28V)

5.0V (0.0V)

0.78V (0.24V)

4.21V (4.26V)

0.0V (0.0V)

3.33V (3.38V)

4.9V (4.94V)

5.07V (5.11V)

5.0V (5.0V)

2.7V (4.32V)

5.08V (0.0V)

3.47V (0.0V)

5.0V (3.75V)

0.0V (4.95V)

0.0V (0.71V)

0.0V (5.0V)

0.0V (0.0V)

0.0V <2.07V> {0.75V}

7.52V

LED On:4.27V LED Off:4.63V

5.0V (5.0V)

LED On:2.77V LED Off:0.0V

<6.6V> {6.77V}

<7.18V> {7.37V}

<7.22V> {7.36V}

<5.04V> {5.04V}

<2.04V> {0.72V}

<2.7V> {1.35V}

<7.2V> {7.34V}

SQL Open:0.73V SQL Close:0.73V

<2.07V> {0.74V}

<6.6V> {6.77V}

SQL Open:0.0V SQL Close:0.0V

<2.61V>{1.34V}

5.0V

Wide:4.97V Narrow:1.22V

Wide:3.15V Narrow:1.9V

5.0V

2.44V

1.59V

1.25V

Wide:3.71V Narrow:0.0V

5.0V

1.56V

2.48V

Wide:4.97V Narrow:1.19V

1.27V

2.94V2.49V

Wide:3.13V Narrow:1.87V

Wide:3.71V Narrow:0.0V

1.24V

1.56V

0.0V

5.0V

1.57V

1.24V

1.57V

Wide:0.0V Narrow:0.0V

Wide:4.98V Narrow:0.0V

1.27V

(2.29V)

(5.0V)

(0.0V)

(2.30V)

(2.26V)

(2.29V)

(2.24V)

(2.27V)

4.99V (4.99V)

4.84V (4.84V)

0.0V (2.27V)

(2.31V)

0.0V (0.0V)

(2.31V)

0.0V (1.68V)

5.0V (5.0V)

0.0V (0.0V)

(2.27V)

4.97V (5.0V)

5.0V

(2.31V)

5.0V

0.0V

2.1V

0.0V <5.07V> {5.06V}

7.5V (7.27V)

4.73V (4.2V)

7.5V <7.33V> {7.43V}

5.0V (4.42V)

7.5V (7.31V)

7.5V (6.64V)

5.0V (4.95V)

5.0V (5.0V)

0.0V (5.0V)

3.23V (3.23V)

5.0V (0.0V)

5.0V (5.0V)

0.0V (5.0V)

5.0V (5.0V)

4.43V (4.46V)

4.99V

2.92V

4.92V

4.99V (7.35V)

6.96V (6.75V)

7.5V (7.38V)

5.0V (5.0V)

5.06V (5.09V)

SQL Open:5.0V SQL Close:5.0V

SQL Open:5.0V SQL Close:0.0V

SQL Open:0.7V SQL Close:0.0V

SQL Open:0.59V SQL Close:0.9V

SQL Open:

0.6V

SQL Close:

5.0V

0.0V

SQL Open:0.26V SQL Close:7.5V

SQL Open:7.5V SQL Close:7.5V

RX : XX TX : XX TX HIGH : <XX> TX LOW : {XX}

1.02V

SQL Open:6.83V

SQL Close:

7.5V

1 4.98V 9 1.11V 2 4.72V 10 5.00V 3 3.81V 11 4.14V 4 5.02V 12 0.55V 5 4.64V 13 0.34V 6 4.64V 14 1.67V 7 0.81V 15 0.00V 8 0.66V 16 0.97V

Q1037

SQL Open

1.55V

SQL Open:3.43V SQL Close:0.04V

SQL Open:7.5V SQL Close:0.21V

10 -- -- -11 -- -- --

5.0V (4.86V)

0.0V

5.0V (4.84V)

(4.22V)

Q1005

SQL Close SQL Open TX High 1-- -- -2-- -- -3 5.00V 5.00V 5.0V 4 4.77V 4.77V 4.78V 5 2.53V 2.53V 2.11V 6 0.0V 0.0V 0.0V 7 4.77V 4.77V 4.77V 8 2.41V 2.41V 4.42V 9-- -- --

+ 39 hidden pages

Sony VX 160V, VX180V Service Manual

Introduction

Contents

Operating Manual Reprint

Controls & Connectors

Display Icons & Indicators (VX-180 Only)

Before You Begin

Operation

Key Functions

Description of Operating Functions

Accessories & Options

Cloning

Specifications

GENERAL Specifications

RECEIVER Specifications (Measurements made per EIA standard TIA/EIA-603)

TRANSMITTER Specifications (Measurements made per EIA standard TIA/EIA-603)

Exploded View & Miscellaneous Parts

Block Diagram

Circuit Description

Receive Signal Path

Squelch Control

Transmit Signal Path

Automatic Transmit Power Control

Transmit Inhibit

Spurious Suppression

PLL Frequency Synthesizer

Miscellaneous Circuits

Alignment

Introduction

Required Test Equipment

Alignment Preparation & Precautions

The alignment tool outline

PLL VCV (Varactor Control Voltage)

Transmitter Output Power

MIC Sensitivity

MAX Deviation

CTCSS Deviation

RF Frequency

Sensitivity

DCS Deviation