background image

INTEGRATED CIRCUITS

LBI-38546

OPERATIONAL AMPLIFIER
U301-U303, U602 & U603
19A700086P4

OPERATIONAL AMPLIFIER
U601
19A134764P1

OPERATIONAL AMPLIFIER
U604, U605
19A701789P1

VOLTAGE REGULATOR
U606
19A704073P2

7

Содержание 19D902304G2

Страница 1: ... front of the radio housing assembly and connects to the logic board through an 18 pin connector J703 The audio board contains the following primary circuits transmit audio and data receive audio and data Both the transmit and receive audio and data signals include tones A general description of the primary circuit functions followss CIRCUIT ANALYSIS TRANSMIT AUDIO CIRCUITS Transmit audio includes...

Страница 2: ...ation of the low frequencies The two filters provide 18 dB Octave of low frequency attenuation and unity gain S Data Voice Mute controls FET transistor Q602 to pro vide audio mute RX Mute allows both voice audio and controller generated Signal tones to be summed at Speech Audio Amplifier U603A Capacitor C617 provides 6 dB Oc tave speech deemphasis for the circuit The RX Audio output at J703 6 is b...

Страница 3: ...Figure 1 Audio Board Block Diagram LBI 38546 2 ...

Страница 4: ...Figure 2 Transmit Audio Circuits LBI 38546 3 ...

Страница 5: ...Figure 3 Receive Audio Circuits LBI 38546 4 ...

Страница 6: ...PARTS LIST LBI 38546 5 ...

Страница 7: ...LBI 38546 OUTLINE DIAGRAM 19D902304 Sh 1 Rev 3 19D902305 Component Side Rev 3 COMPONENT SIDE 19D902304 Sh 1 Rev 3 19D902305 Solder Side Rev 3 SOLDER SIDE 6 ...

Страница 8: ...NTEGRATED CIRCUITS LBI 38546 OPERATIONAL AMPLIFIER U301 U303 U602 U603 19A700086P4 OPERATIONAL AMPLIFIER U601 19A134764P1 OPERATIONAL AMPLIFIER U604 U605 19A701789P1 VOLTAGE REGULATOR U606 19A704073P2 7 ...

Страница 9: ...SCHEMATIC DIAGRAM LBI 38546 AUDIO BOARD 19D902304G2 19D902306 Sh 1 Rev 10 8 ...

Страница 10: ...SCHEMATIC DIAGRAM LBI 38546 AUDIO BOARD 19D902304G2 19D902306 Sh 2 Rev 7 9 ...

Отзывы: