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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
POWER PWB TROUBLESHOOTING
SYMPTOM CHECK POINT POSSIBLE CAUSE
Check +15VS @ connector PD pin 1 Check Q9E00 circuit
Check -15VS @ connector PD pin 7 Check Q9E00 circuit
Check doubler circuit
Check ballast circuit
IC9A24 circuit
Zener D9A43
Check 18V @ L9A45/C9A82 Q9A13 circuit
IC9A23 circuit
Zener D9A41
IC9A21 circuit
Q9A12 circuit
Zener D9A47
F9E10
F9E11
CHECK ALL FUSES
T9A10 circuit
IC9A10 circuit
IC9A22 circuit
Zener D9A39
Check connector PD pin 20 for HIGH (active) PC9A21 circuit
NO POWER
Check 340VDC @ connector PL
Check 3.3V @ connector PA2 pin 1
Check 12VS @ connector PD pin 14
Check 5VS @ connector PC pin 8
Check 4.5V @ connector PD pin 19
Check 18V @ TP18VS
Check 5VSL @ connector PD pin 16
ERROR CODE 51
ERROR CODE 34
ERROR CODE 48
ERROR CODE 41
POWER PWB OUTPUT CONNECTORS