3
Contents
Repair .......................................................................... 24
General disassembly (stage 1) ................................................... 24
General disassembly (stage 2) ................................................... 25
Replacing thermoblock .............................................................. 26
Replacing NTC ............................................................................ 26
Replacing pump .......................................................................... 27
Replacing fine-wire fuse ............................................................. 28
Replacing electronic mainboard ................................................ 29
Replacing control panel.............................................................. 30
Replacing IR sensor ................................................................... 30
Replacing flowmeter ................................................................... 31
Replacing electromagnetic valve ............................................... 32
Replacing steam pipe ................................................................. 33
Replacing jaw .............................................................................. 34
Complete jaw disassembly......................................................... 35
Replacing reed contact ............................................................... 36
Replacing connection to capsule cage ...................................... 36
Replacing ceramic valve............................................................. 36
Replacing capsule cage ............................................................. 37
Replacing pyramid plate ............................................................. 38
Electronic mainboard, wiring diagram ....................................... 39
Maintenance................................................................ 40
Descaling (1) ............................................................................... 40
Descaling (2) ............................................................................... 41
Measuring flow rate .................................................................... 42
Checking for leaks and pump pressure (1) ................................ 43
Checking for leaks and pump pressure (2) ................................ 44
Checking extraction chamber for leaks ..................................... 45
Measuring coffee temperature ................................................... 46
Measuring closing force ............................................................. 47
Checking safety cutoff ................................................................ 48
Checking reed contact ................................................................ 49
Checking detection of jaw position ............................................ 49
Daily care and cleaning (1) ......................................................... 50
Daily care and cleaning (2) ......................................................... 51
Spare parts ................................................................. 53
Summary of Contents for EF 737
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