Isolating The Faulty Part On The Power Supply Board - Epson Stylus PHOTO 2000P Service Manual

EPSON Stylus PHOTO 2000P

3.1.2 Isolating the Faulty Part on the Power Supply Board

This section explains how to troubleshoot the following problems:
The printer is turned on but it does not perform initialization and
no LED indicators come on.
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
disconnected from secondary side. Therefore, if the FFC does not
the connector on the transmit signals, the power supply board is not
panel board? active despite the main board operates
properly.
2 Is the Panel FFC The power switch for this printer is in the
disconnected from secondary side. Therefore, if the FFC does not
CN11 (black, 12-pin) transmit signals, the power supply board is not
on the Main Board? active despite the main board operates
properly.
3 Has the Pin 3 of the Check for the Pin 3 using a circuit tester.
panel FFC broken?
4 Has the fuse (F1) on Check if the F1 located beside CN1 on the power
the power supply supply board has blown out.
board blown out?
5 Is CN1 on the power Check if CN1 is properly connected. CN1
supply board supplies AC power to the primary side of the
disconnected? power supply board.
6 Is CN10 on the main Check if CN10 on the main board is properly
board disconnected? connected. CN10 supplies DC voltage to the
control circuit.
TROUBLESHOOTING
Table 3-10. Isolating the Faulty Part on the Power Supply Board
Step Checkpoint
7 Is the choke coil L1
broken?
8 Is the transformer
(T1) broken?
Overview
Revision A
Action
Turn the power supply board up side down and
check for the electrical continuity at the two
points below:
L1 (reverse side)
Referring to the figure below, check if the
transformer is disconnected from the pole. Try
every combination.
L1 (reverse side)
tr16
tr17
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