IBM 6400-I15 Maintenance Manual - Page 353
Ground Path Diagram, 1 Ohm or less.
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Page 353 highlights
4. Set a Fluke meter (P/N 8496278) or similar device to the lowest resistance scale. Measure the resistance between the power cable ground pin and the printer frame: safety ground circuits should measure 0.1 Ohm or less. 5. Install the paper guide assembly (page 235). J301 IEC 320 AC POWER CIRCUIT BREAKER Line 1 Line 2 / Neutral CHASSIS GND P1 J1 AC AC POWER AC to DC Power Supply Board * V3.5 BOARD PIN 1 = N TEMP HI V4 BOARD PIN 1 = N AC FAIL P101 OPERATOR PANEL 1 N TEMP HI * 2 N STBY 3 +5V 4 +5V 5 +5V RET / LOGIC GND J310 6 +5V RET / LOGIC GND P310 7 +5V RET / LOGIC GND 8 +5V RET / LOGIC GND 9 +8.5V Ret Ret 10 +8.5V 11 +48V EIA-232-E +5 V 12 +48V Serial I/O Card Cage Fan CMX Controller Board Ret +48V Platen Motor Paper Motion Detector Paper Out Detector Left Ribbon Guide Left Ribbon Motor J106 MSL P106 MSL +48V +5 V +5 V +5 V +48V J101 DC POWER Point of Common Ground J108 HBL P108 HBL J105 HBP P105 HBP +8.5V +8.5/+48V Ret Ret Shuttle Assy J116 SMD P116 SMD Terminator Board Ret Shuttle Motor +48V Hammer Bank Board Ret +24V Hammer Bank Fan +5 V Remote Power J107 MSR P107 MSR +48V +5 V +5 V +48V J110 P110 Parallel I/O SHIELD GND +48V Exhaust Fan Cabinet models only Ret Paper Feed Motor Platen Open Switch Right Ribbon Guide Right Ribbon Motor J112 P112 Figure 55. Ground Path Diagram Safety Inspection Guide 353
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