Oki C9850 Maintenance Manual page 194

(a)
• YES Is the DIMM of the Main PCB set properly?
NO
• YES Are the voltages below output to the PU IF connector of the Main PCB?
Pins
Pins
YES
• NO Is +5V output the DENGEN connector of the Engine PCB?
Pins 1 & 3: +5V, Pins 2 & 4: 0V
YES
• NO Replace the Low-Tension Power Supply Unit.
43627911TH Rev. 3
Set the DIMM properly. If that does not solve the problem, replace the
DIMM.
9, 10, 17, 18, 25, 26, 33, 34, 41, 42, 61, 69, 77, 85, 93: +5V±5%
1, 2, 5, 6, 13, 14, 21, 22, 29, 30, 37, 38, 45, 46, 47, 48, 49, 53, 57, 65, 73,
74, 81, 82, 89, 97, 99: 0V
Replace the Main PCB.
Replace the Engine PCB.
Oki Data CONFIDENTIAL
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