Summary of DX 919
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Cb radio model dx929 service manual copyright reserved.
Page 2: Dx 929
- 1 - dx 929 table of contents page chapter 1 specifications 1.0 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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- 2 - 1.0 general model dx 929 channels 40 frequency range 26.965 – 27.405 mhz emission modes am frequency control phase lock loop (pll) synthesizer frequency tolerance 0.005 % frequency stability 0.001 % operating temperature range -30 °c to +50°c microphone dynamic ptt, 500 Ω input voltage 13.8v d...
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- 3 - dx 929 chapter 2 operation figure 2-1 front panel 2.0 introduction this section explains the basic operating procedures for the dx 929 mobile cb radio. 2.1 controls and connections 2.1.1 front panel refer to the above figure 2-1 for the location of the following controls. 1. Microphone jack: u...
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- 4 - 4. Mic gain control: adjusts the microphone gain in the transmit and pa modes. This controls the gain to the extent that full talk power is available several inches away from the microphone. In the public address (pa) mode, the control functions as the volume control. 5. Power control: this co...
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- 5 - rear panel figure 2-2 represents the location of the following connections: figure 2-2 rear panel 1. Antenna: this jack accepts a 50-ohm coaxial cable with a pl-259 type plug. 2. Dc power: this jack accepts the 13.8v dc power cable with built-in fuse. The power cord provided with the radio has...
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- 6 - 2.1.3 frequency chart channel channel frequency (mhz) channel channel frequency (mhz) 1 26.965 21 27.215 2 26.975 22 27.225 3 26.985 23 27.255 4 27.005 24 27.235 5 27.015 25 27.245 6 27.025 26 27.265 7 27.035 27 27.275 8 27.055 28 27.285 9 27.065 29 27.295 10 27.075 30 27.305 11 27.085 31 27.3...
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- 7 - 2.2 microphone the push-to-talk switch on the microphone controls the receiver and transmitter. Press the switch and the transmitter is activated, release switch to receive. When transmitting, hold the microphone two inches from your mouth and speak clearly in a normal voice. This transceiver ...
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- 8 - 2.4 alternate microphones and installation for best results, the user should select a low impedance dynamic type microphone or a transistorized microphone. Transistorized type microphones have a low output impedance characteristic. The microphones must be provided with a four-lead cable. The a...
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- 9 - dx 929 chapter 3 circuit description 3.0 introduction this section explains the technical theory of operation for the dx 929 mobile cb radio. 3.1 pll circuit the phase lock loop (pll) circuit is responsible for developing the receiver’s first local oscillator signal and the transmitter’s excit...
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- 10 -.
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- 11 - dx 929 chapter 4 alignment 4.0 required test equipment c dc power supply (13.8vdc, 10a) d rf wattmeter (10w) e multi-meter f automatic modulation meter g audio signal generator h frequency counter (100 mhz) i rf signal generator (100 mhz) j automatic distortion meter k oscilloscope (50 mhz) l...
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- 12 - 4.1.2 transmitter alignment item u.U.T. Setting adjust point measurement tx power set radio to ch 19 am tx mode. Connect rf power meter to antenna jack. Set swr/mod/pwr switch to pwr. L40, l42, l43, l44 max > 12w balance power between ch. 1 - 40 am tx high power set radio to ch 19 am tx mode....
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- 13 - figure 4-1 transmitter test setup figure 4-2 receiver test setup.
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- 14 - dx 929 main pcb adjustment location rf meter am mod am low power am hi power am mod meter am s-meter am squelch 10.240 mhz adjust am low power am mod.
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- 15 - dx 929 chapter 5 maintenance 5.0 precautions the inherent quality of the solid-state components used in this transceiver will provide many years of continuous use. Taking the following precautions will prevent damage to the transceiver. (i) never key the transmitter unless an antenna or suita...
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- 16 - dx 929 chapter 6 diagrams & parts list 6.0 general information on most electrical and mechanical parts is included in the parts list. The reference designators are in alphanumeric order..
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- 17 - dx 929 rotary switch pcb (ept092920z) (smd-copper side) ( component side ).
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- 18 - part list: dx 929 rotary sw. P.C.B item reference number ranger part number description 1 ept092920z rotary sw pcb 2 r207,r210,r218,r219 rcy010004z chip/f/r 0.0 Ω 0.1w 3 r201 rcy013314z chip/f/r 330 Ω 0.1w 4 r202,r203,r204,r205, r206 rcy016814z chip/f/r 680 Ω 0.1w 5 r215 rcy014724z chip/f/r 4...
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- 19 - dx 929 display pcb (ept092930z) ( component side ) ( component side ) ( copper side ).
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- 20 - part list: dx 929 display p.C.B item reference number ranger part number description 1 ept092930z display pcb 2 r301,r302,r303,r304, r305,r306 rcy016814z chip/f/r 680 Ω 0.1w 3 r308 rcy011024z chip/f/r 1k Ω 0.1w 4 r310 rcy012224z chip/f/r 2.2k Ω 0.1w 5 r309 rcy012234z chip/f/r 22k Ω 0.1w 6 d30...
Page 22: (Ept092940Z)
- 21 - dx 929 (power/mic gain/vol-sq control) vr pcb (ept092940z) ( component side ) ( copper side ).
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- 22 - part list: dx 929 power/mic gain/vol-sq control, vr p.C.B item reference number ranger part number description 1 ept092940z vr pcb 2 sh3027 rcy010004z chip/f/r 0.0 Ω 0.1w 3 r401 rcy011034z chip/f/r 10k Ω 0.1w 4 c401,c402 ck1102ab5x chip/c .001uf 50vw 5 c403,c404 ck1103ab5x chip/c .01uf 50vw 6...
Page 24: (Ept092950Z)
- 23 - dx 929 (rf gain/dimmer control) vr pcb (ept092950z) ( component side ) ( copper side ) part list: dx 929 rf gain/dimmer control, vr p.C.B item reference number ranger part number description 1 ept092950z tb pcb 2 vr501 (dimmer) rv50203525 vr 5kb 3 vr502 (rf gain) rv10203528 vr 1kb 4 j501 ex07...
Page 25: Dx929 Meter Pcb (Ept092961Z)
- 24 - dx929 meter pcb (ept092961z) ( component side ) ( copper side ) ( copper side-smd ).
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- 25 - part list: dx 929 meter pcb (dimmer circuit) item reference number ranger part number description 1 ept092961z meter pcb 2 r603 rcy011504z chip/f/r 15 Ω 0.1w 3 r606,r607 rcy144704z chip/f/r 47 Ω 1/4w 4 r610 rcy011024z chip/f/r 1k Ω 0.1w 4 r605 rcy013324z chip/f/r 3.3k Ω 0.1w 5 r604,r611 rcy01...
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- 26 - dx929 antenna pcb (ept360042z) (copper side-smd ) ( copper side ) ( component side ) part list: dx 919 ant p.C.B item reference number ranger part number description 1 ept360042z ant p.C.B 2 r9 rcy010004z 0 ohm 0.1w 3 r1 rcy014714z 470 ohm 0.1w 4 r3,r4 rcy011014z 100 ohm 0.1w 5 r2 rcy013314z ...
Page 28: Dx 929 Main Pcb (Ept092913Z)
- 27 - dx 929 main pcb (ept092913z) ( components side ).
Page 29: Dx 929 Main Pcb (Ept092913Z)
- 28 - dx 929 main pcb (ept092913z) ( copper side ).
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- 29 - part list dx 929 main pcb reference number ranger part no. Description ept092913z main pcb r19,305,258(b239) rcp160004z 0 Ω 1/16w r246 rcp161004z 10 Ω 1/16w r267,241(b236) rcp161504z 150 Ω 1/16w r133,213,253,282 rcp164704z 47 Ω 1/16w r130,215,220,249 rcp165604z 56 Ω 1/16w r11 rcp166804z 68 Ω ...
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- 1 - c37,175,38 ce0254767z 47uf 25wv c156,238,293,107 ce0161077z 100uf 16wv c252 ce0162277z 220uf 16wv c152,179 ce0163377z 330uf 16wv c91 ce0104777z 470uf 10wv c243,248 ce0251087z 1000uf 25wv c35 cem254767z 47uf 25wv fl1 efcfw455ht cfw-455ht fl2 efcfe107mx sfe10.7mx x1 eycab10240 10.240mhz x3 eybaa...
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Dx 929 schematic diagram (control pcb).
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Dx 929 schematic diagram (main pcb).
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Dx 929 mechanical part dx 929 explode drawing.
Page 35: Www.Galaxyradios.Com.
Any updates or corrections to this service manual will be included in the tech support section of our website at www.Galaxyradios.Com. Updates & corrections.
Page 36: Two Year Warranty
Two year warranty this new galaxy radio is covered by a two year limited warranty. Here are the details. • all of our galaxy radio model numbers begin with the letters “dx” and are covered by our limited two year parts and labor warranty. • “limited” means that we will repair problems caused by fact...
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Ats929010a july, 2003.