IBM 5110 Series Maintenance Analysis Procedures page 251

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MACHINE CHECKOUT
PAGE 13 OF 13
124
- Press RESTART
- Do the test at the end of the Select
Magnet Service Check (see MIM 221).
Is the tape motion rhythmic?
Y N
125
Do the FORWARD AND REVERSE
SELECT MAGNETS SERVICE CHECK
(see MIM 221).
126
- Remove the scratch tape.
-Insert the diagnostic tape.
Go to Page 12, Step 113, Entry Point H.
127
Go To Map 0420, Entry Point A.
128
-Switch the RUN switch under the covers to NOT
RUN.
-Switch the DISPLAY REGISTERS switch to
DISPLAY REGISTERS.
-Observe the display.
Is any of the information in the registers
changing?
Y N
129
-Press the STEP switch.
Did ROLO change?
(See DISPLAY REGISTERS in the
Diagnostic Aids section in the MIM).
Y N
A A A
N P
Q
A A A
N P
Q
MAP 0900-13
130
- Probe H6A04 (+single instr switch comm).
Is the UP light on?
Y N
131
Bad H2 (base I/O) card.
Check/ replace Z3 (display and control
panel) cable (see MAP 0210 and MIM
248,249).
132
Bad J2 (processor) card (see MAP 050 for
jumpering).
Bad RUN switch (see MIM 201,249).
Check/ replace Z3 (display and control
panel) cable (see MAP 0210 and MIM
248,249).
Bad STEP switch
133
Go to Page 6, Step 059, Entry Point E.
134
Bad RUN switch (see MIM 201,249).
Check/ replace Z3 (display and control panel)
cable (see MAP 0210 and MIM 248,249).
01JAN79
EC 836600 PEC 835541
MAP 0900-13
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