Faults
20
Fig. 11: Measurements on TP9
1.
Measurements on TP9
–
a signal of about 0.5 V should turn the generator on,
–
a signal of about 12 V should turn the generator off.
If 12 V are measured, despite "Analyzing" appearing on the display, then the microcontroller
board is defective or the connection from the HF 42 circuit board, pin 7 is loose.
Fig. 12: TP13 test point
When the command for the generator is received ( 0.5 V DC ), the triac triggering pulses must
appear on the TP13 test point. If there is no oscilloscope available you can test this with a digital
voltmeter. The displayed value depends on what type of digital voltmeter you have. There must
be a voltage increase on TP13, once the word "Analyzing" has appeared on the display, or once
0.5 V are present on TP9. When no voltage increase occurs on TP13 , despite having 0.5 V on
TP9; the HF 42 circuit board is defective.
NOTICE
After replacing the HF 42 board, make sure that the 50 pin plug is properly inserted. It takes a
lot of force to push in 50 pins at once. 50 pin plugs that haven’t been properly inserted are a
Содержание CS-2000
Страница 2: ...2 Copyright Copyright by Eltra GmbH Retsch Allee 1 5 D 42781 Haan Germany ...
Страница 6: ...Notes on service instructions 6 ...
Страница 72: ...Adjustments 72 Fig 57 Gas flow regulation The flow controller mainly consists of the following components ...
Страница 77: ...Adjustments 77 Fig 61 IRC 1 3 ...
Страница 107: ...Service 107 Fig 91 Tubes to squeeze ...
Страница 120: ...Miscellaneous 120 6 1 2 Left hand side Fig 106 Left hand side view ...
Страница 122: ...Miscellaneous 122 6 1 3 Right hand side Fig 107 Right hand side view ...
Страница 129: ...Miscellaneous 129 6 1 7 Infrared cell Fig 111 Infrared cell ...
Страница 139: ...Miscellaneous 139 Fig 119 Left hand side power wiring 6 2 3 Valve wiring ...
Страница 140: ...Miscellaneous 140 Fig 120 Valve wiring 6 2 4 Control signal wiring Fig 121 Control signal wiring ...
Страница 142: ...Miscellaneous 142 6 2 6 IR cell internal signals Fig 123 IR current supply new version ...
Страница 145: ...Miscellaneous 145 6 3 2 Gas flow for induction furnace when furnace is open ...
Страница 146: ...Miscellaneous 146 6 3 3 Gas flow for resistance furnace ...
Страница 147: ...Miscellaneous 147 6 3 4 Valve contolling ...
Страница 160: ...Copyright Copyright by Eltra GmbH Retsch Allee 1 5 D 42781 Haan Germany ...