IBM 3745 130, Maintenance Information Procedures

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3745 FRU Exchange Procedure
Table 4-11. Voltage Test Points
Connector Pin Voltage Maximum Minimum
01B-A1J2
(FDD) 1
2
3
4 +12 V
GND
GND
+ 5 V +13.00 V
+ 5.25 V +11.00 V
+ 4.85 V
PS1-J1
Voltage
Test Points 2
5
12 +12 V
+ 5 V
GND +13.00 V
+ 5.25 V +11.00 V
+ 4.85 V
b. Press Validate.
c. Using Table 4-11, measure the voltages
on the voltage test points of PS1 (refer to
Figure 4-71). If the voltages are incorrect,
exchange PS1.
8. Remove the power as follows:
a. Invoke the menu 1 (see PF key line).
b. In menu 1 type DIF in the selection area
for Disk Function.
c. Press SEND.
d. The Disk Function Screen is displayed.
e. Type 8 the in selection area for Power
OFF Disk/Diskette Driver.
f. Press SEND.
g. If DISK/DISKETTE DRIVES CONCUR-
RENT MAINTENANCE ENTERED is dis-
played, go to Step 9 on page 4-54.
h. If DISK/DISKETTE DRIVES CONCUR-
RENT MAINTENANCE CANCELLED is
displayed, procede as follows:
1) Inform the customer that the 3745
is to be powered OFF.
2) Press Power Off on the control panel.
3) Switch CB1 OFF. Refer to
Figure 4-70 on page 4-52.
4) Go to Step 9 on page 4-54.
Figure 4-71. PS1
Chapter 4. 3745 FRU Exchange
4-53