1 8 Section 61150090L1-5A, Issue 1 61150090L1-5A
Figure 15. Surge Arrestor Gas Tube
Replacement
6. Disconnect the door switch JP2 connector on the
fan board by carefully pulling the connector off
the header. DO NOT PULL ON WIRES.
7. Take an insulated ball-clip or alligator-clip and
short across the two exposed door switch JP2
connector pins at the fan board.
8. If the Door LED goes Off, the door switch is
defective.
9. Follow the door switch replacement Instructions
to replace the defective door switch.
NOTE
Refer to the Fan Powering Unit I&M Practice:
61150091L1-5, for additional details on the
FPU.
4. MAINTENANCE
Maintenance consists of replacement of surge arrester
gas tubes, door gaskets, or other replaceable items.
Fan board repairs should not be attempted in the field.
Repair services are obtained by returning the defective
unit to ADTRAN Customer Service.
Refer to Table 7 for a list of replacement item part
numbers.
Surge Arrester Replacement
Each slot in the T200/T400 shelf has four associated
surge arrestor gas tubes (Figure 14) for surge
protection. Surge protection is provided by
replaceable gas surge arrestor tubes. Perform the
following procedure to replace gas tubes:
WARNING
Prevent electrical shock during maintenance
by removing the appropriate slot powering
modules and tagging out to prevent
inadvertent insertion.
1. At the CO, remove the appropriate power
module to deenergize the associated slot at the
cabinet.
2. Grasp one gas tube and remove it using the gas
tube pliers supplied with the cabinet, see
Figure 15.
3. Insert a replacement gas tube in the same
position.
Typical removal
or replacement
shown.
Table 7. Replacement Item Part Numbers
noitpircseDrebmuNtraP
gaB.zO8,tnacciseD1008613
sebuTsaG1006813
looTtcartxE/tresnIebuTsaG2409623
draoBnaFyramirP5-0900512
draoBnaFyradnoceS6-0900512
tiKtnuoMdaP8-0900512
tiKtnuoMeloP9-0900512
)"62.1-68.0(tiKtnuoMbutSelbaC51-0900512
tiKriapeRteksaGrooD61-0900512
tiKriapeRhctiwSrooD71-0900512
Figure 14. Surge Arrestor Board
P12
P8
P11
P10
P9
P7
P2
P6
P5
P4
P3
P1
Slot 12,
Gas Tubes
Slot 12,
Connection
to Cable
Slot 1,
Gas Tubes
Slot 1,
Connection
to Cable
Desiccant Renewal
Each cabinet is shipped with two moisture absorbing
desiccant bags inside the cabinet. To ensure continued
moisture absorption the desiccant must be renewed
periodically, depending on the environment.
