Isolating The Faulty Part On The Power Supply Board; Isolating The Faulty Part According To The Phenomenon - Epson Stylus PHOTO 890 Service Manual

EPSON Stylus Photo 890/1280/1290

3.1.2 Isolating the Faulty Part on the Power Supply Board

This section explains how to troubleshoot the following problems:
n
The printer is turned on but it does not perform initialization and no LED
indicators come on.
n
Problems occurs after the printer is turned on.
Be sure to troubleshoot in the order specified since the steps are listed in the
disassembly order to facilitate the job.
NOTE: If you answer "Yes" to a question listed under "Checkpoint", take the action
described to the right under "Action". If "No", proceed to the next step.
Table 3-10. Isolating the Faulty Part on the Power Supply Board
Step Checkpoint Action
1 Is the Panel FFC The power switch for this printer is in the secondary
disconnected from the side. Therefore, if the FFC does not transmit signals, the
connector on the panel power supply board is not active despite the main board
board? operates properly.
2 Is the Panel FFC The power switch for this printer is in the secondary
disconnected from CN11 side. Therefore, if the FFC does not transmit signals, the
(black, 12-pin) on the power supply board is not active despite the main board
Main Board? operates properly.
3 Has the Pin 3 of the panel Check for the Pin 3 using a circuit tester.
FFC broken?
4 Has the fuse (F1) on the Check if the F1 located beside CN1 on the power supply
power supply board board has blown out.
blown out?
5 Is CN1 on the power Check if CN1 is properly connected. CN1 supplies AC
supply board power to the primary side of the power supply board.
disconnected?
6 Is CN10 on the main Check if CN10 on the main board is properly connected.
board disconnected? CN10 supplies DC voltage to the control circuit.
7 - Replace the Power Supply Board with a new one.
TROUBLESHOOTING
3.1.3 Isolating the Faulty Part according to the
Phenomenon
Refer to this section if you could not solve the problem in Section 3.1.1.1 or Section
3.1.2 or need more information to isolate the cause according to the exhibited
phenomenon. This section mostly covers the problems relating to the main control
circuit and other parts.
Table 3-11. Phenomenons Exhibited
No. Phenomenon Exhibited
1 CR motor does not rotate.
2 PF motor does not rotate.
3 Pump/ASF motor does not rotate.
4 Cleaning does not solve the print problem.
Overview
Revision C
Table to refer to
Table 3-12
Table 3-13
Table 3-14
Table 3-15
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