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©2005 VERTEX STANDARD CO., LTD. EH022N90A
Exploded View & Miscellaneous Parts
Board Units (Schematics, Layouts & Parts)
FTD-7 DTMF Paging Unit (Option)
This manual provides the technical information necessary for servicing the VX-120/-170 VHF FM Transceiver.
Servicing this equipment requires expertise in handing surface-mount chip components. Attempts by non-qualified
persons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal in
Two PCB layout diagrams are provided for each double-sided board in this transceiver. Each side of the board is
referred to by the type of the majority of components installed on that side (Side A or Side B). In most cases one
side has only chip components (surface-mount devices), 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 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.
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
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
Frequency Ranges: RX 137 - 174 MHz
TX 144 - 146 (148) MHz
Channel Steps: 5/10/12.5/15/20/25/50/100 kHz
Frequency Stability: ±5 ppm @ 14° to 140° F (–10° to +60° C)
Repeater Shift: ±600 kHz
Emission Type: F2 , F3
Antenna Impedance: 50 ?
Supply Voltage: Nominal: 7.2 V DC
(Negative Ground) Operating: 6.0 ~ 16.0 V DC (EXT DC Jack)
11.0 ~ 16.0 V DC (EXT DC Jack with Charging)
Current Consumption: 125 mA (Receive, 200 mW output)
(Approx. @7.2 V) 45 mA (Standby, Saver Off)
20.5 mA (Standby, Saver On)
8 mA (Auto Power Off)
1.5 A (5 W TX)
Operating Temperature: –4° to 140° F (–20 °C to +60 °C)
Case Size: 2.36 (W) x 4.72 (H) x 1.26 (D) (60 x 120 x 32 mm)
(W/O knob, antenna, & belt clip)
Weight: 13.8 Oz (390 g) with FNB-83, antenna, and belt clip
RF Power Output: 5.0 W (High) / 2.0 W (Middle) / 0.5 W (Low) (@7.2 V)
Modulation Type: Variable Reactance F2D, F3E
Maximum Deviation: ±5.0 kHz (F2D, F3E)
Spurious Emission: At least 60 dB down (@ High and Middle power)
At least 40 dB down (@ Low power)
Microphone Impedance: 2 k ?
Circuit Type: Double-Conversion Superheterodyne
Intermediate Frequencies: 1st: 21.7 MHz
2nd: 450 kHz
Sensitivity: 0.2 µV for 12 dB SINAD (137-140 MHz)
0.16 µV for 12 dB SINAD (140-150 MHz)
0.2 µV for 12 dB SINAD (150-174 MHz)
Selectivity: 12 kHz/35 kHz (–6 dB /–60 dB)
AF Output: 700 mW @ 16 ? for 10 % THD (Internal Speaker)
(@ 7.5 V) 400 mW @ 8 ? for 10 % THD (EXT SP Jack)
Specifications are subject to change without notice, and are guaranteed within the 144 MHz amateur band only. Fre-
quency ranges will vary according to transceiver version; check with your dealer.
Exploded View & Miscellaneous Parts
MIC HOLDER RUBBER
PANEL ASSY (VX-170)
REAR CASE ASSY
SPECIAL NUT ASSY
RA057730A (x2 pcs)
RA0577400 (x2 pcs)
TAPTITE SCREW M2X4NI#3
SPECIAL SCREW M2X2.35 4050
TAPTITE SCREW M2X10NI
TAPTITE SCREW M2X3 #1
PAN HEAD SCREW M2X4NI#2
Non-designated parts are available
only as part of a designated assembly.
PANEL ASSY (VX-120)
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