Sharp PN-T322B Service Manual - Page 69

CHAPTER 8. TROUBLESHOOTING 2. THE REMOTE CONTROLLER DOES NOT WORK Any problem with the Remote Control? Has the battery gone dead? Is the IR signal emitted? (Operate the Remote Control while looking at the Remote Control through a camera of mobile phone. If you see the LED luminous, the IR signal is properly emitted.) No abnormality Abnormality Replace the battery or the Remote Control. Is the adjustment locked? (is the button operation with the remote controller inhibited by the main unit?) No Is there any abnormality in the key PWB and related sections? Is there any abnormality in the connection cable? Is there any abnormality in the key PWB? No abnormality Is there any abnormality in the I/F PWB and related sections? Is there any abnormality in the connection cable? Is there any abnormality in the I/F PWB? Yes Abnormality Abnormality Release the adjustment lock. Replace the abnormal part with a new one. Replace the abnormal part with a new one. 3. THE DISPLAY DOES NOT APPEAR (DISPLAY ABNORMALITY) Is the display used in the environment where the ambient temperature is 40 C or above? No abnormality Abnormality Is there any abnormality in the adjustment and setting? No abnormality Abnormality Is there any abnormality in the video input signal? Is there any abnormality in the video cable? No abnormality Abnormality Is there any abnormality in the LCD module? Is there any abnormality in the connection cable? Is there any abnormality in the LCD control PWB? No abnormality Is there any abnormality in the I/F PWB? Abnormality Abnormality Change the installation place, or make sure to avoid the ambient temperature from reaching 40 C or above. Readjust and reset with the menu. Replace the abnormal part with a new one. Replace the abnormal part with a new one. Replace the abnormal part with a new one. PN-T321/T322B TROUBLESHOOTING 8 - 2