C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-5
02.9631.0010
CONFIDENTIAL
15 Jan 98
3.1.1.3
EPROM Test Setup
Parts:
1 EA
PROM,(PRGMD:27C256-2) VL2B HI TEST (87.7138.0001)
1 EA
PROM,(PRGMD:27C256-2) VL2B LOW TEST
(87.7138.0002)
1 EA
PROM, (PRGMD:27C256-2) VL2C HI TEST (87.7149.0001)
1 EA
PROM, (PRGMD:27C256-2) VL2C LO TEST (87.7149.0002)
Tools:
IC extractor
Cheater cable
To install test EPROMs and test VL2B/VL2C luminaire:
Step 1.
Remove luminaire from system installation.
Step 2.
Remove lamp control PCB.
a. Remove six 10-32x3/8”PPB screws that secure chassis
cover to electronics chassis assembly.
b. Open chassis cover.
c. At card retainer, carefully pull out lamp control PCB.
HI
LO
TEST EPROMS
LAMP CONTROL PCB
LCBRMV
Step 3.
Install test EPROMs.
a. At lamp control PCB, using IC extractor tool, remove
system EPROMs.
b. Install HI and LO -test EPROMs.
Step 4.
Re-install lamp control PCB. Close and secure chassis cover.
Step 5.
Set thumbwheel address to 000.
Note: Power is immediately sent to luminaire when cheater cable is
connected. Do not connect cheater cable to luminaire until ready to
perform tests.