Mindray Passport 5-Lead, Service Manual

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Passport 5-Lead, 5L, LT, XG Service Manual 0070-00-0420 7 - 17
Calibration Diagnostics and Calibration Procedure
FIGURE 7-8 Video Controller Test
a.
Highlight the Video Controller Test from the Display Tests Menu and press the SELECT
key to start the test. The vertical bars will either fill the entire screen or half the screen
dependant upon the version of software installed.
b.
Connect an oscilloscope, channel 1 to U30 pin 16 and channel 2 to U30 pin 9 of
the CPU board. Set the scope for 10usec/div, sync on channel 1. The waveforms
are shown in Figure 7-12.
c. Confirm that the correct signals are present on the four bits LCD0-3 as shown in
Figure 7-12.
d.
If the above signals are not present, disconnect the display cable J68. If the signals
are now present the display is possibly loading the signals, otherwise the CPU Board
is possibly defective.
e. Press the END key (5L, LT), EXIT key (XG) to return to the Display Tests Menu.
7.5.8 Keyboard Test
a. When this menu option is selected the unit performs a test on the front panel touch
switches by displaying the name of the key which was pressed.
b. Highlight the Keyboard Test from the Main Diagnostic Test Menu and press the
SELECT key to start the test.
c. A blank key name window will appear on the display.
d.
Whenever a key is pressed the name of the key will be displayed in the key name
window.
e. Exercise each key to verify correct operation.
f. Press the END key for three seconds to exit test and return to the Main Diagnostic
Menu.
Datascope Passport Datascope Passport
CH1
U30-16
CH2
U30-9,7,5,3
CH1
U30-16
CH2
U30-9,7,5,3
2V/DIV 10u SEC/DIV
Expanded View .5u SEC/DIV
OR