19 of 26
Jun 2001
Mainframe
Agilent 6890 Gas Chromatograph Service Manual
Power/Electronics Replacement 430
Replacing the transformer—GC serial number ≥ 10225
Replacing the transformer—GC serial number ≥ 10225
WARNING Before proceeding, turn off the main power switch and unplug the power cord.
Caution Make sure you are properly grounded with an ESD strap before continuing.
When you are facing the back of the instrument, you will see the transformer
on the bottom, left side.
1. Unclip the transformer wiring harness from connector J7 on the main
board.
2. 6890A and 6890 Plus. Unclip the wires from J5 on the ALS Interface PCB,
if installed.
6890N. Most 6890N transformers have a single cable going to connector
J7 on the main board. A few early models have two cables; one goes to J7
and the other to an adapter (G1530-61590 Conversion Cable) that goes
to the back of P1, the cable-end plug that connects to J7.
Figure 430-13 Some early 6890N transformers require a conversion cable for
autosampler power
13
10
13
P7
(connects to J7
on main board)
Tra ns for mer
G1530-61590
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