Repair
68
333347F
Replace MZLP
Disassembly:
1.
Turn main power switch OFF.
2.
Remove electrical enclosure front access door (10).
3.
Disconnect heated hose electrical connectors from
outside of MZLP (112).
4.
Note location of each cable, then unplug all cables
from the MZLP (112) that will be replaced. See F
IG
.
47.
5.
Remove four screws (114) securing MZLP (112) to
electrical enclosure (1) then carefully remove MZLP
from electrical enclosure. See F
IG
. 47.
6.
Replace MZLP. See F
IG
. 47 for MZLP #1, MZLP #2,
and MZLP #3 identification.
a.
To replace MZLP #1, remove the daughter card
and standoffs, and re-install them on the new
MZLP #1.
b.
To replace MZLP #3, remove the jumper (135)
from MZLP #3 J5 connector and reinstall it on
the new MZLP #3 J5 connector.
Reassembly:
1.
Set MZLP rotary switch to “1” on MZLP with
daughter card. Set MZLP rotary switch to “2” or “3”
on MZLP without daughter card, based on location.
See F
IG
. 48 for rotary switch location.
2.
Apply channel label stickers to new MZLP. See F
IG
.
47.
3.
Use four screws (114) to install MZLP (112) to elec-
trical enclosure (1).
4.
Reconnect cables to MZLP (112).
NOTE:
Do not force the electrical connection. Minimal
force is required to seat the connector. If resistance is
felt, stop and verify the connector orientation.
NOTE:
If unable to determine connector location, see
on page 78.
5.
Install electrical enclosure front access door (10).
6.
Connect heated hose electrical connectors to new
MZLP.
NOTE:
MZLP may need updated software. See
Replace MZLP Daughter Card
Disassembly:
1.
Turn main power switch OFF.
2.
Remove electrical enclosure front access door (10).
3.
Note location of each cable then unplug all cables
from MZLP daughter card (112a).
4.
Remove four mounting screws (112b) from daugh-
ter card (112a) and set aside.
5.
Unplug daughter card (112a) from the MZLP
#1 (112).
F
IG
. 47
114
112
MZLP
#1
MZLP
#2
MZLP
#3
F
IG
. 48
112b
112
112a
Rotary Switch
ti20342a
Summary of Contents for 24T918
Page 16: ...Component Identification 16 333347F ...
Page 103: ...Accessories 333347F 103 ...
Page 129: ...Technical Data 333347F 129 ...