Toshiba e-STUDIO281c, e-STUDIO351c, e-STUDIO451c 5.1.17 Image control related service call

June 2005 © TOSHIBA TEC e-STUDIO281c/351c/451c TROUBLESHOOTING

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5.1.17 Image control related service call

(1) Based on the procedure of [CE10], [CE20] and [CE40] described below, check the status and

take appropriate actions. And then perform the forced performing of image quality closed-loop

control according to the following procedure.

(2) After confirming the items in (1), clear the abnormal detection counter of image quality control.

[CE10] Image quality sensor abnormality (OFF level)

1. While pressing [0] and [5] simultaneously, turn ON the power.

2. Key in [395], and then press the [START] button. Confirm that the image quality control

has finished normally.

1. While pressing [0] and [8] simultaneously, turn ON the power.

2. Key in [573], and then press the [START] button.

3. Rewrite the displayed status counter from "1" - "16" to "0", and then press the [ENTER]

or [INTERRUPT] button.

4. Key in [574], and then press the [START] button.

5. Rewrite the displayed status counter from "1" - "16" to "0", and then press the [ENTER]

or [INTERRUPT] button.

6. Key in [575], and then press the [START] button.

7. Rewrite the displayed status counter from "1" - "16" to "0", and then press the [ENTER]

or [INTERRUPT] button.

8. Key in [576], and then press the [START] button.

9. Rewrite the displayed status counter from "1" - "16" to "0", and then press the [ENTER]

or [INTERRUPT] button.

Is the connector of the image quality sensor, or the connector CN338 on the LGC board dis-

connected?

Is the harness between the LGC board and the image quality sensor, or the harness between

the LGC board and the switching power supply open circuited?

ÈYESÆConnect the connector securely. Replace the harness.

Is the output voltage from the 12V-power supply normal?

ÈNO ÆCheck the power supply system and replace the switching power supply.

YES

1) Replace the image quality sensor.

2) Replace the LGC board.