Sharp LC-32D42U, Service Manual

Page: 25 / 138

LC-32D42U/LC-37D42U
5 – 8
2.6. Key writing
1. EDID writing (Main PWB: QPWBXD862WJZZ, analog RGB input terminal / HDMI input terminal)
Adjustment item Adjustment conditions Adjustment procedure
1 Analog RGB
EDID writing File version checking 1) Using the checker, write the EDID data for HDMI to
IC1505 that is mounted on the main PWB.
TL1514: I2C clock, TL1515: I2C data
TL1516: 5V, TL1517: GND
TL1502: VCLK (Write: H, Read: V pulse)
2) In the analog RGB inspection, use a DDC-compatible
device. If the EDID has not been written, the analog
RGB input does not function normally.
2 HDMI EDID writ-
ing Inspection mode
File version checking 1) Using the checker, write the analog HDMI EDID data to
IC1501 and IC1502 that are mounted on the main PWB.
TL1508/1510: I2C clock, TL1509/1511: I2C data
TL1512/1513: 5V, TL1519/1518: GND
TL1534/1535: Write protection (H: Write, L: Write
enable)
2) Write the data before the HDMI inspection with the
checker.
In the HDMI inspection, use a DDC-compatible device. If
the EDID has not been written, the HDMI does not func-
tion normally.