4700 Refrigerated Sampler Service Guide
Section 4 CPU and Power Supply
4-11
4.4 Control Panel
Some issues involving the 4700 control panel may be software
related. Verify that the sampler has the latest software version
(see Section 1.5.1
Updating the Software
). Some problems may be
r e s o l v e d b y p e r f o r m i n g a s o f t w a r e r e s e t ( s e e
Section 1.5.2
Software Reset
). If these solutions do not resolve the
issue, control panel replacement may be necessary.
WARNING
Always disconnect the 4700 sampler from AC power before
performing service and repairs. Risk of injury or equipment
damage. Familiarize yourself with the general instructions
in sections 1.7 and 1.6 before proceeding.
4.4.1 Control Panel Removal
Items required:
Replacement control panel
(part #60-4704-031)
#2 Phillips screwdriver
Display flash memory
serial number
T38
This test returns the serial number of the flash
memory chip.
Each flash chip has a unique 16-character
serial number in hexadecimal format.
Returns OK on a new line after the serial
number line when done.
Turn off backlight
T39
Turns off the backlight for the LCD module.
Returns OK to indicate completion
Turn on backlight
T40
Turns on the backlight for the LCD module.
Returns OK to indicate completion
Turn on CPU heater
T41
This test applies full power (100%) to the heater
resistor on the CPU board.
This will last for 10 seconds and then the power
will be turned off.
Returns OK to indicate completion
Test Data
Save data in flash
memory
T99
This command saves the calibration values for
the analog input measured in tests T04, T09,
and T20. It also saves the current real-time
clock time and date as the time the board was
tested. Therefore, the real-time clock should be
set before issuing this command.
Returns OK to indicate completion
Retrieve time of CPU
test
T98
This command displays the time and date of the
CPU test as saved from the T99 command,
thereby serving as verification for the T99 test.
Returns: CPU TEST = HH:MM
DD-MON-YY
OK
(A time/date of 00:00 1-JAN-77 means the
time/date has not been saved.)
Table 4-2 CPU Board Functional Tests (Continued)
Function
Command
Results
60-4704-031
Summary of Contents for 4700
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Page 6: ...Isco 4700 Refrigerated Sampler Service Guide Safety iv ...
Page 12: ...4700 Refrigerated Sampler Service Guide Table of Contents x ...
Page 30: ...4700 Refrigerated Sampler Service Guide Section 1 Introduction and General Guidelines 1 18 ...
Page 60: ...4700 Refrigerated Sampler Service Guide Section 2 Sample Delivery System 2 30 ...
Page 108: ...4700 Refrigerated Sampler Service Guide Section 4 CPU and Power Supply 4 26 ...
Page 124: ...4700 Refrigerated Sampler Service Guide Appendix A Electrical Diagrams A 2 ...
Page 126: ...4700 Refrigerated Sampler Electrical Wiring A 4 Figure A 3 4700 wiring diagram 230V ...
Page 128: ...4700 Refrigerated Sampler Electrical Wiring A 6 Figure A 5 4700 CPU schematic diagram ...
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