
97
3. Checking the grid and filament voltages
Turn IG on with the tool program and measure the grid and filament voltages (CP4[GRID],
CP5[FIL-], CP3[FIL+]). These voltages can also be measured at the IC bulb connector.
Check the grid.
Voltage across CP4[GRID] and IG bulb, Pin 4 = 15010
±
V
Pull out the IG connector if V
CP4
is abnormal. If V
CP4
becomes normal, replace the IG bulb.
If the voltage remains abnormal after the connector is disconnected, replace the IG CTRL-A
PCB.
Check the filament.
If the filament does not light, turn IG off and measure the resistance between Pin 3 and Pin 5
of the IG bulb. The resistance should not exceed 1
Ω
. Replace the IG bulb if the
resistance is abnormal.
If the filament does light:
Voltage across CP5[FIL-] and IG bulb, Pin 5 = 251
±
V
An abnormal V
CP5
value indicates an abnormal grid current. Replace the IG CTRL-A PCB.
If the filament is normal : Filament voltage (VCP3 – VCP5) = 3.0 to 4.0V
Содержание GCMS-QP2010 Series
Страница 1: ...1 225 00612A Gas Chromatograph Mass Spectrometer GCMS QP2010 Service Manual...
Страница 14: ...14 Do not increase the ion source or interface temperature above the level required for analysis...
Страница 27: ...27...
Страница 71: ...71 Wiring Diagrams 1 Wiring diagram Overall Wiring Diagrams...
Страница 72: ...72 Wiring Diagrams 2 Wiring diagram MAIN POWER ASSY...
Страница 73: ...73 Unit Operation Checks 3 Wiring diagram Details...
Страница 76: ...76 MAIN POWER ASSY Block Diagram Parts inside the broken box are in the MAIN POWER ASSY...
Страница 79: ...79 DC POWER A Block Diagram...
Страница 84: ...84 MAIN CTRL A Block Diagram...
Страница 85: ...85...
Страница 90: ...90 IS CTRL A Block Diagram...
Страница 94: ...94 HV PCB ASSY block diagram 1 UNNCI case of model EI CI 2 NCI case of model NCI...
Страница 98: ...98 IG CTRL A PCB Block Diagram...
Страница 103: ...103 CP6 24V normal range 22 7 to 25 3VDC CP7 24V normal range 22 7 to 25 3VDC CP12 5V normal range 4 8 to 5 3VDC...
Страница 109: ...109 DI CTRL A block diagram...
Страница 145: ...121 5 Remove the IS CTRL A Board Unit Disconnect the two connectors Remove the three screws and the spacer screw...
Страница 150: ...126 Do not remove the 2 screws on the right side Remove the 2 screws on the left side...
Страница 151: ...127 Remove cardboard Move the TW300 left by holding in both hands...
Страница 154: ...130 10 Preparation of new TW300 New TW 300 Removed TW300 Check the name plate Old type New type...
Страница 155: ...131 Remove the cap of outlet Loosen the 3 fixing screws and remove the plate Remove the o ring...
Страница 158: ...134 Hook the right side hooks on the neck of inlet Attach the left side screws and hooks Fasten lightly the 4 screws...
Страница 160: ...136 Remove the cardboard Completion of TMP mounting...
Страница 161: ...137 12 Fix the flange to outlet Place the flange on the outlet Do not forget to place o ring...
Страница 163: ...139 Slide fast the IS CTRL A board down and fix it 4 screws Connect the two connectors...
Страница 164: ...140 14 Place the covers Place the front cover Place the front door...