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3745 MAPs
3745 Power MAPs
MAP 3900: Overcurrent on Power Supply 1
Symptom Explanation Conditions That Could Cause This Symptom
Overcurrent on power supply 1.
Power ON executed less than 10
seconds after a power OFF. This is
a normal operation.
Short circuit in:
– - MOSS Board
or cable from 01A-Y0E4 to 01F-A1J2
– - Basic Board
or flat cable from 01F-A1TB1/3 to 01G-A1YF/H
or flat cable from 01F-A1TB2/4 to 01G-A1YA/D
or cable from 01F-A1J4 to 01G-A1YE
– - any LIB1 or LIB2
or cable from 01F-A1J5 to 01M-A1A3
or cable from 01F-A1J6 to 01M-A2A3
or cable from 01F-A1J8 via 01L-B1 to 01L-A1A3
or cable from 01F-A1J7 via 01L-B2 to 01L-A2A3
– - HDD or FDD
or cable from 01F-A1J3 to 01D-A1J3 and
01B-A1J2
PCC
PS1
001
Notes:
1. Panel codes 00B and 00C can occur if the
3745 is powered ON less than 10 seconds
after a power OFF. This is a normal operation.
Wait at least 10 seconds after a power OFF
before you try to power ON again.
2. You will have to disconnect (area by area) the
elements connected to PS1. Depending on
the configuration of your 3745, the panel code
00C (overvoltage, undervoltage) can be dis-
played at power ON when one board is dis-
connected. During this MAP consider only
panel code 00B (overcurrent).
Power ON the machine. Wait at least 10
seconds then power ON. If the trouble
remains, continue with this step. If not, gather
all information from the BER file and contact
your support group.
– Unplug the Basic board power cable 01F-J4
from PS1.
– Unscrew the Basic board 5V laminar bus
01F-A1TB1/2/3 and 4. Refer to Figure 4-36 on
page 4-31.
– Power ON the 3745 as follows:
Set the power control in local mode:
– Using Power Control scroll till the
value is 3, local mode.
(Step 001 continues)
001 (continued)
– Press Validate.
– Press Power On reset.
Is the panel code 00B still displayed?
Yes No
002
– Press Power Off.
– Replug the basic board power cables.
– Unplug the basic board card by card from
01G-A1A2 to 01G-A1X2 and try to power
the 3745 ON after each one.
Is the panel code 00B still displayed?
Yes No
003
– Press Power Off.
– Exchange the faulty card you have
just unplugged when 00B (oc) dis-
appeared.
004
– Exchange the basic board. Go to “Basic
Board Exchange Procedure” on
page 4-77.
005
(Step 005 continues)
2-12 3745 Models 130 to 17A: MIP