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23-43-00
ALL ú ú 01 Page 103 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
~.............................................................................. | PROBLEM | CAUSE | PROCEDURE | CORRECTION | ................................................................................ | The chime in | PA amplifier, M63| Push ATTEND and ATTENDANT | Replace the| | the passenger| | call switches. If the | PA amplifier.| | cabin does | | attendant call light comes| | | not operate | | on, but the chime does not| | | when you make| | operate --| | | an attendant | | | | | call| | | | | | | | |
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
23-43-00
ALL ú ú 01 Page 104 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
~.............................................................................. | PROBLEM | CAUSE | PROCEDURE | CORRECTION | ................................................................................ | Ground crew | GRD CALL switch, | Open the PASS & CREW CALL/ | Replace the| | call horn | S32 | LAV SMK DET circuit breaker| switch.| | does not | | on panel P18. Get access| | | operate when | | to the GRD CALL switch.| | | you push the | | Connect an ohmmeter across| | | GRD CALL | | the switch. Push the GRD| | | switch | | CALL switch, and read the| | | | | meter. If the meter does| | | | | not show continuity --| | | | | | | | | Ground crew call | Get access to the ground | Replace the| | | horn, M53 | crew call horn. Close the | horn.| | | | PASS & CREW CALL/LAV SMK| | | | | DET circuit breaker on| | | | | panel P18. Connect a volt-| | | | | meter across the horn.| | | | | Push the GRD CALL switch,| | | | | and the meter will show| | | | | 28v dc. If the voltage is| | | | | correct --| | | | | | | | | CREW CALL HORN | If the voltage does not | Make sure the| | | circuit breaker | show across the horn --| CREW CALL HORN| | | on panel P6-1 | | circuit| | | | | breaker on| | | | | panel P6-1| | | | | is closed.| | | | | Replace it if| | | | | necessary.| | | | | | | | Flight instrument| If the voltage does not | Replace the| | | accessory unit, | show across the horn --| accessory| | | M160 | | unit.| | | | | | 2..............…..................…............................…...............1
D. Put the Airplane Back to its Usual Condition
(1)
Put the flight and the ground crew call systems back to the usual condition.
(2)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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