4. Press the toggle switch on the LGA-ST forward to the MCM/L3 PWR/GND position. This action will test
the L3 modules for power-to-ground shorts. Observe the lit LEDs on the LGA-ST and take the
corresponding following actions:
Green L3 LED is lit
This is a pass state. No further action is required.
Amber L3 LED is lit
This is a fail state. There might be a short between one of the two L3 voltages and ground,
which is a failing condition, or the combination of memory books, I/O books, and L3 cache
modules in parallel might be creating a low resistance.
Complete the following steps to correct this condition:
a. Disengage memory books followed by I/O books one at a time.
b. Repeat step 2a on page 835 through step 2h on page 836 until either the L3 test results in
a pass state, or all memory and I/O are disengaged and the L3 test remains in a fail state.
c. If the L3 module test remains in a fail state after all memory and I/O are disengaged,
remove the L3 module and inspect the interposer for shorts.
d. Reinstall the L3 module once and repeat the test. If the fail persists, replace the L3
module.
Green MCM LED is lit
This is a pass state. No further action is required.
Amber MCM LED is lit
This is a fail state. There might be a short across the MCM voltage and ground. Perform the
“Method 3. Testing MCMs and Pass Through Modules for a Short Circuit” on page 816 and
correct any short conditions before powering on.
5. Place the toggle switch into the L3 PWR/PWR position.
Green and Amber MEM LEDs are not lit
Power is removed from these circuits when the switch is in the L3 PWR/PWR position.
Green L3 LED is lit
This is a pass state. No further action is required.
Amber L3 LED is lit
This is a fail state. There is a short between the two L3 power domains. Complete the
following steps to correct this condition:
a. Remove the L3 module and inspect the interposer for shorts.
b. Reinstall the L3 module once and repeat the test. If the fail condition persists, replace the
L3 module.
6. Install another L3 module and repeat step 3 on page 836 through step 5 until all required L3 modules
are installed.
Shorts Test Qualified Service Meters and Fail Criteria
Manufacturer
Model
Range
Accuracy @ 1.0
ohms or less
Fail Criteria
Fluke
8060A
200 Ohms
+/-0.04
+0.40
Fluke
8060A/AA
200 Ohms
+/-0.04
+0.40
Fluke
8062A
200 Ohms
+/-0.04
+0.40
Fluke
187
500 Ohms
+/-0.10
+0.40
Fluke
189
500 Ohms
+/-0.10
+0.40
Fluke
83 (original models)
400 Ohms
+/-0.10
+0.40
Fluke
85 (original models)
400 Ohms
+/-0.10
+0.40
Chapter 9. Removal and Replacement Procedures
837
Summary of Contents for pSeries 670
Page 1: ...pSeries 670 Service Guide SA38 0615 03 ERserver...
Page 2: ......
Page 3: ...pSeries 670 Service Guide SA38 0615 03 ERserver...
Page 12: ...x Eserver pSeries 670 Service Guide...
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Page 324: ...Yes Go to Step 154A 14 on page 302 304 Eserver pSeries 670 Service Guide...
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Page 848: ...L3 Cache Shorts Test Step 4 828 Eserver pSeries 670 Service Guide...
Page 849: ...L3 Cache Shorts Test Step 5 Chapter 9 Removal and Replacement Procedures 829...
Page 851: ...L3 Cache Shorts Test Step 2 Chapter 9 Removal and Replacement Procedures 831...
Page 853: ...L3 Cache Shorts Test Step 4 Chapter 9 Removal and Replacement Procedures 833...
Page 854: ...L3 Cache Shorts Test Step 5 834 Eserver pSeries 670 Service Guide...
Page 971: ...7040 Model 671 Media Subsystem 1 2 3 4 5 6 7 8 9 10 Chapter 10 Parts Information 951...
Page 973: ...Power and SCSI Cables to the Media Subsystem 1 2 3 5 4 6 Chapter 10 Parts Information 953...
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