TLS-IB Site Prep Manual
PROM Chip Replacement (Software Upgrade)
35
PROM Chip Replacement (Software Upgrade)
The PROM chip (U29) is replaced when a software upgrade is installed. This procedure requires that you perform a
RAM clear.
1. If possible, record the current setup information. Switch Off power to the system.
2. Open the front door of the TLS-IB. The CPU board is installed in the door.
3. Attach an anti-static strap to your wrist and to a good ground.
4. Move RAM clear jumper from NML to CLR position (Figure 30). Switch On power to TLS-IB and wait 30 seconds,
then switch Off power to TLS-IB. Move the RAM clear jumper back to NML position.
5. Disconnect the ribbon cable connector from the CPU board. Remove the CPU board following the instructions in
“Replacing the CPU Board” on page 34.
6. Locate the PROM chip on the board [Figure 29].
7. Remove the PROM chip following instructions in Figure 31.
8. Replace the PROM chip following instructions in Figure 32.
9. Replace the CPU board in the front door of the TLS-IB. Connect the CPU board cable to the Power Supply board.
10. Switch On power to the TLS-IB and check your system configuration for proper setup.
Figure 30. Clearing RAM
OFF
J5
B
G
SIDE
J4
D1
LED1
IFSF
J7
S1
SERVICE
RAM
IB
POWER
CLR
N
M
L
C
L
R
N
L
Probe Status
Indicator (LED1)
IFSF Status
Indicator (D1)
RAM Clear Jumper (J4)
shown in Normal position.
You must move jumper to
middle and right pins to
clear RAM:
J4
N
M
L
C
L
R
Clear RAM
