Repair
32 309574C
Temperature Control Board
2. Relieve pressure, page 8.
3. Refer to electrical diagrams. Temperature control
board is on left side inside cabinet.
4. Put on static conductive wrist strap.
5. Disconnect all cables and connectors from board,
F
IG
. 10.
6. Remove nuts and take entire temperature control
assembly to workbench.
7. Remove screws and take board off heatsink.
8. Install new board in reverse order. Apply thermal
heatsink compound to mating surfaces of board and
heatsink.
Temperature control board has seven green
LEDs. Power must be on to check. See F
IG
. 7 for
location.
Table 3: Temperature Control Board LEDs
LED Status Function
D26 blinks Board powered
D14 on Zone A turned on
D13 cycles on
and off
Zone A powered, LED
cycles as temperature
cycles
D18 on Zone B turned on
D19 cycles on
and off
Zone B powered, LED
cycles as temperature
cycles
D27 on Hose zone turned on
D15 cycles on
and off
Hose zone powered, LED
cycles as temperature
cycles
CAUTION
Before handling board, put on a static conductive wrist
strap to protect against static discharge which can
damage board. Follow instructions provided with wrist
strap.
1. Turn main power OFF . Disconnect power
supply.
WARNING
Read warnings, page 5. Wait 5 min for stored voltage
to discharge (E-30 and E-XP2 models only).
Order Part No. 110009 Thermal Compound.
Table 4: Temperature Control Board Connectors
Connector Pin Description
J1 1, 2 Overtemperature switch A
3, 4 Overtemperature switch B
5, 6 Current sensor
7 Temperature sensor A, red
8 Temperature sensor A, yellow
9 Not used
10 Temperature sensor B, red
11 Temperature sensor B, yellow
12 Thermocouple, silver
13 Thermocouple, red
14 Thermocouple, purple
J2 n/a To A heaters
J5 n/a To display board
J8 n/a Data reporting
J9 n/a To B heaters
J13 n/a To heated hose
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