Sanyo NV-E7500 - Navigation System With DVD Player Service Manual page 26

TROUBLE SHOOTING
(DVD - ROM MECHANISM)
Does disc rotate?
Yes
Is laser luminescence
performed?
Check RF AMP IC(IC1101)
Check DSP IC(IC1201)
Check SPINDLE MOTOR
Is a map displayed?
Good product
No
No
Yes
No
Yes
Check the socket between PCB and MECHANISM
(CS1101 ,CS1301, CS1302 and CS1303)
Check laser drive circuit
(Q1102 and Q1103)
Check inside SW for PICK UP
Check feed motor circuit (IC1102)
Check 3.3V power supply circuit
(IC1103, IC1104 and Q1101)
Check laser PICK UP
Check I/F socket(CS1201)
Check ATAPII/F IC(IC1250)
Check DRAM(IC1251)
Check microcomputer IC(IC1151)
Check DSP IC(IC1201)
Check DRAM(IC1202)
Check feed motor pulse count circuit(IC1105)
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