TM 1-1500-204-23-4 (1) Compass compensation. Remote indicating   compass   compensation   procedures   are   the same   as   the   magnetic   compass,   except   that   when compensating,  the  power  supply  to  the  compass  must be turned on. (2) Testing  and  replacement  criteria.    Do  not replace    components    of    remote    indicating    compass without   first   testing   wiring   for   proper   continuity   (see figure   4-24),   and   the   indicator   for   correct   operation. Test indicator by using the following procedures: (a) Using P-1, ANASM61, or ANASM339V1  tester,  test  indicator  and  transmitter  for proper  operation.    Refer  to  applicable  tester  technical manual   for   operation   and   connection   of   tester,   and applicable wiring diagram for location of transmitter. (b) When the remote magnetic compass   does   not   read   within   specified   tolerances, check  applied  voltage.    If  power  supply  is  functioning properly,     troubleshoot     system     in     accordance     with applicable TM 11 series maintenance manual. (c) Replace either indicator or transmitter when faulty. q. Electrical Liquid Indicating Systems and Indicators.  Electrical liquid indicating systems are used for    fuel    quantity    and    anti-icing    fluid    quantity.        A transmitter   in   the   liquid   tanks   transmits   an   electrical signal to position the pointer of a gauge in the cockpit. Refer   to   applicable   aircraft   maintenance   manual   for testing and troubleshooting procedures. r. Position    Indicating    Systems    and    Indicators. Position indicating systems are used to indicate position of  landing  gear  and  flaps.    A  cockpit  indicator  shows relative  position  of  landing  gear  and  flaps.    Refer  to applicable  aircraft  maintenance  manual  for  testing  and troubleshooting procedures. s. Repair    and    Replacements.        The    following paragraphs describe repair and replacement of instruments and instrument system components that can be accomplished on the flight line. (1) Repair.  Line repair is limited primarily to the following: · Resoldering broken leads · Replacing     tubing,     hose,     and fittings · Removing obstructions from rigid or flexible tubing · Recompensating compass systems · Removal    and    replacement    of components Figure 4-24.  Remote Indicating Compass Wiring Diagram 4-30