
74
Unit Operation Checks
4. MAIN POWER ASSY
Outline
The MAIN POWER ASSY uses switching power supplies to convert the supply voltage (100
to 240VAC) into the various supply voltages: DC POWER-A (
±
24V), IG CTRL-A (+5V), and
IS CTRL-A (+5V). It incorporates a PCB that provides ON/OFF control of the rotary pumps
and turbo molecular pumps.
Operation Check Method
If an abnormality occurs, follow the procedure below to check the operation of the MAIN
POWER ASSY to efficiently diagnose the problem.
Caution
A voltage of 100 to 240VAC is supplied to the MAIN POWER ASSY. To avoid electric
shocks or damage to the assembly, touch only the points instructed.
1. Checking the supply voltage
First, check that the power switch is in the OFF position. Disconnect the MAIN POWER
ASSY cable connectors (Connectors
c
to
j
in the diagram) from the boards supplied or
from MAIN POWER. Turn ON the power switch and measure the voltage at each
connector on the power line, as follows:
TMP1: Measure the voltage at Pin 1 of Connector
c
in the block diagram, relative to Pin 2.
(normal range: +22.7 to +25.3VDC)
TMP2: Measure the voltage at Pin 1 of Connector
d
in the block diagram, relative to Pin 2.
(normal range: +22.7 to +25.3VDC)
IS CTRL-A: Measure the voltage at Pin 3 of Connector
e
in the block diagram, relative to
Pin 1.
(normal range: +4.8 to +5.3VDC)
IG CTRL-A: Measure the voltage at Pin 3 of Connector
f
in the block diagram, relative to
Pin 1.
(normal range: +4.8 to +5.3VDC)
DC POWER-A: Measure the voltage at Pin 1 of Connector
g
in the block diagram, relative
to Pin 3.
(normal range: +22.7 to +25.3VDC)
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...