IBM 5100 Maintenance Analysis Procedures page 61

(
(
(
BRING UP MAP
PAGE 3 OF 15
020
-Switch the RUN switch under the covers to
run.
-Probe the card select lines listed below.
Record conditions other than the DOWN light
on and the UP light off.
o
G2-S10
1 G2-U13
2 G2-UlO
3 G2-S13.
Is the DOWN light on and the UP light off
for all four probe points?
Y N
021
Are both lights on for any of the four
probe points?
Y N
022
Defective G2 (controller) card.
023
-Switch the DISPLAY REGISTERS switch
to NORMAL.
Go to Page 2. Step 016. Entry Point I.
024
-Switch the DISPLAY REGISTERS switch to
NORMAL.
Go to Page 2. Step 016. Entry Point I.
025
Defective display L32-64-R32 switch.
Check/ replace display and control panel cable
(refer to 210, 241).
L N P
1 2 2
MAP 0400-3
026
-Remove the J2 (display) card.
-Probe H6-E02.
Is the DOWN light on?
Y N
027
Defective J2 (display) card.
028
-Reinstall the J2 (display) card.
Defective DISPLAY REGISTERS switch,
Refer to 210).
Check/replace display and control panel
cable.
(refer to 210, 241).
029
(refer to 200).
Defective RUN switch.
Check / replace display and control panel
cable.
(refer to 210, 241).
030
-Power down.
-Remove the read/write storage cards from L2,
L4, M2, M4, N2 and N4.
-Power up. Wait 30 seconds.
Did either LOAD 0 or CLEAR WS (with no
misspelling) appear on one and only one line
of the 5 inch display?
Y N
4
031
Defective K2 (read/write storage) card.
Defective K4 (read/write storage) card.
Defective J2 (display) card.
Defective G2 (controller) Qard.
Defective H2 (I/O and diag) card.
09DEC75 PN 1608387
EC 829523 PEC 828851
U
MAP 0400-3