Partner Tech International PT-5700, Service Manual, Page: 55 / 88

47
C
HAPTER
4
L
OCATING THE
P
ROBLEM
Refer to this section to locate the problem with the PT-5700. The following topics are described.
• “General checkout guidelines”
• “Power system checkout”
• “Cash drawer checkout” on page 48
• “Touch screen symptoms” on page 49
• “Power symptoms” on page 50
• “Network symptoms” on page 50
• “USB symptoms” on page 51
• “MSR reader symptoms” on page 51
• “Boot symptoms” on page 51
• “Peripheral-device symptoms” on page 52
• “Motherboard and PCB board jumper settings” on page 52
General checkout guidelines
Use the following procedure to troubleshoot problems:
• Identify as many symptoms as possible in detail.
• Verify symptoms by recreating them.
• Follow the corrective procedures in order.
• If you replace an FRU and the symptom remains, reinstall the original FRU before going to the next step. Do
not replace non-defective FRUs.
Power system checkout
Power system problems can result from a faulty ac adapter, or undetermined problems (such as loose connections).
Refer to the following to check the ac adapter.
1
Connect the ac adapter to an electrical outlet.
2
Measure the output voltage on the pins of the adapter connector. See the following table:
3
If the voltage is not correct, replace the AC adapter.
If the voltage is correct go to “Power symptoms” on page 50.
Pin Voltage (V dc)
1 Ground
2 Ground
3 12
4 12
1
2
3
4