A07B500S manual
Pag. 43
The PWN and PW500 modules supply power to the entire device.
Adjustment can be made
only by authorized people as the cards contain dangerous voltage levels
;
there are ground planes of
various voltages and connected directly to the mains supply.
It is thus dangerous to even connect
using an insufficiently insulated measuring instrument.
If failure occurs, attempting to fix the
card is not recommended. Once the F3-F2 (15A), F1 (2A) fuses have been checked, if the cause of
failure is still unresolved, send the transmitter back to the factory or at least substitute all of the
power source modules found on the right side of the transmitter. To access the modules, remove
the right side panel of the transmitter, which requires the device to be shut off prior to accessing the
modules.
Through the RT1 (PWN board) trimmer, it is possible to regulate power source voltage to the final
MOS-FETs (44Vdc on pin 2 of J1).
The RT1 trimmer (PW500 board) regulates the 15Vdc voltage (pin 4 of J1), while the negative
voltage is constant at –12V.
The RT3 trimmer (PW500X board) regulates measurement of radiator temperature of the power
amplifier circuits.
The RT2 trimmer (PW500X board) regulates measurement of current supplied from the power
source on 48Vdc of voltage.
6.2 A15 Module - RF driver
Module A15 represents the final amplifier driver; it has an input power of 10 mW and an
output power of 15 Watts if the power source at all stages is 15Vdc.
Without an input signal, adjustment of RT1 trimmer is necessary for a drained current of 300mA at
the second stage. RT2 trimmer must be adjusted to reach a final drained current of 200mA.
Adaptation circuits are completely broad band and require no adjustment.
Summary of Contents for A07B500S
Page 15: ...A07B500S manual Pag 15 A07B500S TRANSMITTER BLOC DIAGRAM...
Page 16: ...A07B500S manual Pag 16 A07B500S POWER SUPPLY BLOC DIAGRAM...
Page 27: ...A07B500S manual Pag 27...
Page 34: ...A07B500S manual Pag 34...
Page 42: ...A07B500S manual Pag 42 ADJUSTMENT4 6 1 Module PWN PW500 power supply...
Page 46: ...A07B500S manual Pag 46...
Page 68: ...A07B500S manual Pag 68 fig 9a...
Page 69: ...A07B500S manual Pag 69 fig 9b...
Page 70: ...A07B500S manual Pag 70 fig 9c...
Page 73: ...A07B500S manual Pag 73 fig 9c...
Page 74: ...A07B500S manual Pag 74 DIAGRAMS AND LAYOUTS...
Page 75: ...A07B500S manual Pag 75 PWN BOARD POWER SUPPLY...
Page 76: ...A07B500S manual Pag 76 PWN BOARD POWER SUPPLY...
Page 79: ...A07B500S manual Pag 79 AUDIOIN BOARD AUDIO INPUTS...
Page 80: ...A07B500S manual Pag 80 AUDIOIN BOARD AUDIO INPUTS...
Page 81: ...A07B500S manual Pag 81 AUDIOIN BOARD AUDIO INPUTS...
Page 85: ...A07B500S manual Pag 85 LCDP BOARD DISPLAY DRIVER...
Page 86: ...A07B500S manual Pag 86 LCDP BOARD DISPLAY DRIVER...
Page 90: ...A07B500S manual Pag 90 MBP BOARD MOTHER BOARD...
Page 91: ...A07B500S manual Pag 91 MBP BOARD MOTHER BOARD...
Page 92: ...A07B500S manual Pag 92 MBP BOARD MOTHER BOARD...
Page 93: ...A07B500S manual Pag 93 MBP BOARD MOTHER BOARD...
Page 97: ...A07B500S manual Pag 97 258 1 74HC00N Gate 2 Input NAND U23 KEY BOARD KEY...
Page 98: ...A07B500S manual Pag 98 KEY BOARD KEY...
Page 100: ...A07B500S manual Pag 100 SINTD BOARD VCO OSCILLATOR...
Page 101: ...A07B500S manual Pag 101 SINTD BOARD VCO OSCILLATOR...
Page 104: ...A07B500S manual Pag 104 Total DMPX BOARD STEREOCODER...
Page 105: ...A07B500S manual Pag 105 DMPX BOARD STEREOCODER...
Page 108: ...A07B500S manual Pag 108 AGC BOARD AUDIO AUTOMATIC GAIN CONTROL...
Page 109: ...A07B500S manual Pag 109 AGC BOARD AUDIO AUTOMATIC GAIN CONTROL...
Page 112: ...A07B500S manual Pag 112 MBP500 BOARD MBP A500 CONNECTION...
Page 113: ...A07B500S manual Pag 113 MBP500 BOARD MBP A500 CONNECTION...
Page 115: ...A07B500S manual Pag 115 A15 BOARD RF DRIVER AMPLIFIER...
Page 116: ...A07B500S manual Pag 116 A15 BOARD RF DRIVER AMPLIFIER...
Page 118: ...A07B500S manual Pag 118 DC250 BOARD DIRECTIONAL COUPLER...
Page 119: ...A07B500S manual Pag 119 DC250 BOARD DIRECTIONAL COUPLER...
Page 122: ...A07B500S manual Pag 122 A500 BOARD POWER AMPLIFIER A500 BOARD POWER AMPLIFIER...
Page 123: ...A07B500S manual Pag 123 A500 BOARD POWER AMPLIFIER...
Page 124: ...A07B500S manual Pag 124 PW500 BOARD AUXILIARY POWER SUPPLY...
Page 125: ...A07B500S manual Pag 125 PW500X BOARD AUXILIARY POWER SUPPLY...
Page 126: ...A07B500S manual Pag 126 PW500 BOARD AUXILIARY POWER SUPPLY...
Page 127: ...A07B500S manual Pag 127 PW500X BOARD AUXILIARY POWER SUPPLY...
Page 130: ...A07B500S manual Pag 130 LPF500 BOARD RF LOW PASS FILTER...