S 036-020-002
 (3)  
Disconnect the IFQT wire harness from the applicable IFQT-J2 connector.
 (4)  
Set the power switch on the test unit to ON.
 S 766-021-002
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ISOLATED FUEL QUANTITY  ú 28-41-91
 TRANSMITTER (IFQT)  ú CONFIG 2 ú 01 Page 606 ú Mar 12/02 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 
737-300/400/500MAINTENANCE MANUAL 
POWER SWITCH 
PSD60-1 TEST SET 
SIMMONDS 
PRECISION
PRESS FOR 
ON  PF 
TWO TERM. 
MEG READINGS
506.6 
CHASSIS 
M
OFF
PSD60-1 
AIRCRAFT ONLY  
SIM TU ONLY  
F  SIMULATOR  
SIM TU & COMP  U  
INDICATOR  TANK UNITS  MEASURE INT  C N  COMP  TU  
T  
MEASURE EXT  
LOZ  T  TU  0  2  0  4  2  
PF  COMP  
T  LOZ-HIZ  
U  COMP-HIZ  10-200 PF  10-2000 PF  
LOZ-COMP  S  
HIZ  LOZ-SHLD  E  
O C  SHLD  H  COMP-SHLD  L E  
M  M  HIZ-SHLD  C  
P  SHLD-GND  T  
COMP  LOZ-GND  
COMP-GND  
C  HIZ-GND 
SYSTEM 
TESTER
CONNECT TO 
AIRFRAME 
GROUND
PSD60-504 FUEL TANK 
IFQT WIRE HARNESS 
DO NOT CONNECT SPAR CONNECTORTO IFQT 
COMPONENTS IN THE FUEL TANK 
Test Equipment Set-Up for Insulation Resistance Check Figure 602 (Sheet 1) 
M46071
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ISOLATED FUEL QUANTITY  ú 28-41-91
 TRANSMITTER (IFQT)  ú CONFIG 2 ú 01 Page 607 ú Mar 12/02 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 
737-300/400/500MAINTENANCE MANUAL 
POWER SWITCH 
PSD60-1 TEST SET
SIMMONDS 
PRECISION
ON 
CHASSIS OFF 
TANK UNITS INDICATOR LOZ 
T 
U 
HIZ C 
SHLD
O 
M 
P
COMP 
C 
CONNECT TO 
AIRFRAME 
GROUND
IFQT WIRE HARNESS 
DO NOT 
CONNECT 
TO IFQT
AIRCRAFT ONLY 
SIM TU ONLY 
SIM TU & COMP 
MEASURE INT 
MEASURE EXT 
T 
TU 
PF  COMP LOZ-HIZ COMP-HIZ LOZ-COMP LOZ-SHLD 
H 
COMP-SHLD M 
HIZ-SHLD SHLD-GND LOZ-GND COMP-GND HIZ-GND 
PF 
506.6 
M
PSD60-1 
F U N 
C COMP T 
0 2 
10-200 PF S E L E C T 
PRESS FOR 
TWO TERM. 
MEG READINGS
SIMULATOR 
TU 
0 4 2 
10-2000 PF 
SYSTEM TESTER 
SPAR CONNECTOR 
PSD60-504 FUEL TANK 
DO NOT CONNECT 
IFQT WIRE HARNESS 
Test Equipment Set-Up for Insulation Resistance Check 
Figure 602 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ISOLATED FUEL QUANTITY  ú 28-41-91
 TRANSMITTER (IFQT)  ú CONFIG 2 ú 01 Page 608 ú Mar 12/02 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
M46206
A 
737-300/400/500MAINTENANCE MANUAL 
POWER SWITCH 
PSD60-1 TEST SET
SIMMONDS 
PRECISION
PRESS FOR 
ON  PF 
TWO TERM. 
MEG READINGS
506.6 
CHASSIS 
M
OFF
PSD60-1 
AIRCRAFT ONLY  
SIM TU ONLY  
F  SIMULATOR  
SIM TU & COMP  U  
INDICATOR  TANK UNITS  MEASURE INT  C N  COMP  TU  
T  
MEASURE EXT  
LOZ  T  TU  0  2  0  4  2  
PF  COMP  
 
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