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OFF  D E DB142A DB142B  F A DB139  C W/G SW DB139  78.662 MHz MULTIPLIER 1557.50 MHz 1ST  LIMITER  PREAMP  NOISE TXMT GEN  DISCRETE MONITOR  RESET PULSE MAP ENABLE  STAB AND DRIVE CIRCUITS  B15 E15 C10 C11  26V AC SCAN MONITOR  M L  (SHT 2) 
SYSTEM 2 LOGIC OFF  2  PWR SUPPLY SYS 2  GND TO R/T K L E M +28V DC +12V DC  B E FROM NO. 2 (SHT 2) R/T C  D INTLK (SHT 2) E  MULTIPLIER 2ND 9345 MHz  DRIVER  IMPATT DIODE AMP 9345 MHz MODULATOR  CIRCULATOR PWR  LATCH  STC ENABLE PWR 4 5  C12 C13 C14 WAVEGUIDE SCAN DRIVE  N 
NO. 2 
(SHT 2) 
B142 CONTROL PANEL (P8)  CONTROL BUS 0  H J _ _  D  (P/O R/T MOUNT) B138 WAVEGUIDE SWITCH NO. 2 TO R/T (SHT 2)  M101 RECEIVER TRANSMITTER WEATHER RADAR (SHT 2) TO/FROM ANTENNA  2 1  TURB MODE ON SN 352-399 FAN TEST SWITCH PART OF R/T MOUNT. SWITCH ACCESSIBLE ONLY WITH R/T REMOVED 
Weather Radar System Schematic 
Figure 3 (Sheet 1) 

EFFECTIVITY
CONFIG 3 SN 351-399 799Page 13/14
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Sep 25/94

 

B110 INS NO. 2 (E2-6) B140 RECEIVER/TRANSMITTER NO. 2 (E5)
B143 ANTENNA ASSEMBLY (NOSE RADOME)
Weather Radar System Schematic
Figure 3 (Sheet 2)

EFFECTIVITY CONFIG 3 SN 351-399

799 Page 15/16
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 Sep 25/94

115V AC DB138A (MT)
J1001C (R/T)
FAULT

ESS RADIO 29
J1001B (R/T)
C9
WEA RDR
MEMORY
PWR

BUS
CONTROL

MODE SELECTOR TEST OFF MAP P7 OVHD C.B. PNL R/T 1 WX  AC GND B6 C11 C2 FAN C7 1 DC GND 21 DB138B 39 ON/OFF 1 J1001B (R/T)  POWER SUPPLY P/S  MONITOR POWER 5  TIMING, CONTROL AND MONITORING MODULE  A/D CONVERTER  VIDEO PROCESSOR  STC ENABLE 4  429 INTERFACE  A B A B  J4 J3 B3 B4  BUS NO. 1 BUS NO. 2 CONTROL  F P  FROM F/O INDICATOR (SHT 2) INDICATOR (SHT 2) CAPT'S FROM 
SW  OFF 
TEST  CONTROL  DB142A  A 
WX MAP  BUS LINE  _ H_ J  CONTROL BUS NO. 0  B7 B8  B 
DRIVER 
TO CAPT'S 
GAIN CONTROL AUTO MAX  GAIN CAL  MICRO PROC A/D  P E_  PNL LTS 5V AC (33-11-00)  Y 62 X 63 64 DB109B ROLL NO. 3 B109 INS NO. 1 (E2-6) 46 45 PITCH NO. 5 Z H L  F12 J14 K14 H14 F11  429 INTER-FACE  R/T ANT IND CON WG SW GYRO AIR TEST  1  AMPLIFIER 1.298 MHz 3RD MIXER 23.596 MHz LOGARITHMIC 23.596 MHz RCVR MON  AGC 3  1  ANTENNA STABILIZATION INTERFACE 453 2  A B G2 G3 A B D3 D2  DATA BUS 2 TO F/O INDICATOR DATA BUS 1 INDICATOR H G  TO SHT 2 
10  5  +5V  DC GND A  2  236.984  2ND IF AMP  MICROPROCESSOR 
SYS 1 15 15 10 5  2  1  TILT 5V DC SYS 1 PWR SUPPLY  DB142B ON/OFF 1 ON/OFF 2 V V L M K  AND INDICATORS TO R/T NO. 1 (SHT 2) AND INDICATORS TO R/T NO. 2 (SHT 2) A B  SW W/G INTLK D8 D7 +12V DC +28V DC GND FREQUENCY SOURCE C6 D6  78.662 MHz 49.709 MHz  RECEIVER MULTIPLIER DIVIDER 9557.38 MHz MHz  2ND MIXER 1ST MIXER 1ST IF AMP 212.38 MHz  3  MONITOR ANTENNA  ANTENNA  E14 E10 E11 E12 E13 C3 C8  ANTENNA PWR 115V AC MONITOR DRIVE ELEVATION ELEVATION I J K 
2  DB142A DB142B E E K +28V DC D  E B F A DB139  DB139 D W/G SW INTLK C  78.662 MHz MULTIPLIER 1557.50 MHz 1ST  MODULATOR LIMITER  PREAMP  PWR NOISE TXMT GEN  DISCRETE MONITOR LATCH  STC ENABLE RESET PULSE MAP ENABLE  4  STAB AND DRIVE CIRCUITS  E15 C10 C11 C12 D15  26V AC SCAN MONITOR  L M  SHT 2 TO/FROM 
SYSTEM 2 LOGIC  PWR SUPPLY SYS 2  L M  GND +12V DC TO R/T  FROM SHT 2 C  (SHT 2) NO. 2 TO R/T E  MULTIPLIER 2ND 9345 MHz  DRIVER  IMPATT DIODE AMP  9345 MHz  CIRCULATOR  5  PWR  C13 C14 WAVEGUIDE SCAN DRIVE  N 
NO. 2 
(SHT 2) 
B142 CONTROL PANEL (P8)  CONTROL BUS 0  H J _ _  D  (SHT 2) NO. 2 TO R/T B139 WAVEGUIDE SWITCH  1 B138 RECEIVER TRANSMITTER WEATHER RADAR (SHT 2) TO/FROM ANTENNA FAN TEST SWITCH PART OF R/T MOUNT. SWITCH ACCESSIBLE ONLY WITH R/T REMOVED. 
Weather Radar System Schematic 
Figure 3 (Sheet 3) 

E39296
EFFECTIVITY
CONFIG 3AF 121,122 799Page 17/18
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