GE Solar 7000, Service Manual

Page: 138 / 214

CALIBRATION: Solar 7000 Color Monitor
5-4 Solar 7000/8000/View Patient Monitor Revision J
414993-001
Preparation Remove monitor housing by following the steps given below.
1. Turn the power switch at the rear of the monitor to OFF.
2. To aid in disassembly, refer to “Disassembly Guidelines” in Chapter
7: “Monitor Assembly.” (Remove two screws at the back of the unit.
Lay the unit on its front display. Do not apply too much pressure on
the Trim Knob control. Remove three screws from bottom of unit.
Pull the housing directly up. Set the unit upright again.)
3. Apply power at the rear power switch and let the unit warm up for at
least 30 minutes.
4. Color units will automatically degauss the display when turned ON.
If the red color is impure (not true red), the screen may need to be
degaussed again. (Use Service Mode.) Note that once the display is
manually degaussed, it cannot be degaussed again for at least 10
minutes.
An external degaussing coil may have to be used if the impure red
persists after performing following procedure.
Horizontal Frequency
Adjust Do the following steps in the order given for the color display.
1. Set DMM to frequency counter mode by selecting the AC and HZ
button.
2. Disconnect the video cable ribbon cable from connector on the main
processor PCB, pn 800678-00X.
3. Locate variable resistor R61 on the solder side of the deflection PCB.
4. Connect positive lead of DMM to TP18 or TP19 on solder side of the
deflection PCB. Connect negative lead to chassis GND.
5. Verify 34.53 kHz ±20 Hz for the horizontal frequency. Adjust variable
resistor R61 to achieve this measurement. The unit must be at
operating temperature for this adjustment.
6. Reconnect video connector ribbon cable assembly to connector on the
main processor PCB.