TROUBLESHOOTING & REPAIR | M300EU |
| Addendum to M300E/EM Manual P/N 04288 |
11.5. SUBSYSTEM CHECHOUT
11.5.1. RELAY BOARD
The information found in Section 11.5.5 of the M300E/EM Operators Manual (P/N 04288) is applicable to the M300EU with the following exception:
•The following table replaces Table
FUNCTION | CONTROL | |
DEVICE | ||
| ||
Wheel Heater | K1 | |
Bench Heater | K2 | |
|
|
IN SOCKET
Yes
Yes
OVEN HEATER
K3
YES
IZS Valves | U4 |
IR Source Drive | U5 |
Yes
No
11.5.2. MOTHERBOARD
11.5.2.1. A/D Functions
The M300EU makes higher resolution CO measurements than the M300E/EM means that it is susceptible to temperature coefficient issues related to the motherboard’s
•Compare the values of the BOX TEMP & OVEN TEMP test functions. If they are significantly different check the function of the:
•Oven theaters.
•The oven heater fans.
•The motherboard stabilization fan.
•The relays controlling the oven heaters.
•No abnormal blockages to airflow inside the oven area exist.
66 | 05514 Rev A1 |