Y Drive Buffer Troubleshooting - LG 42PQ30 Training Manual
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Also See for 42PQ30:
- Training manual (124 pages) ,
- Manual de usuario (123 pages) ,
- Specifications (2 pages)
Table of Contents
Y Drive BUFFER Troubleshooting
Y Drive BUFFER Troubleshooting
YOU CAN CHECK ALL 8 BUFFER ICs USING THIS PROCEDURE
YOU CAN CHECK ALL 8 BUFFER ICs USING THIS PROCEDURE
BACK SIDE OF Y-DRIVE Board
BUFFER IC FLOATING GROUND (FGnd)
128 Output Pins
43
43 42
• Any of these output lugs can be tested.
• Look for shorts indicating a defective Buffer IC
Using the "Diode Test" on the DVM, check
the pins for shorts or abnormal loads.
RED LEAD ON
BUFFER IC FGnd
Indicated by white outline
BLACK LEAD ON
BUFFER IC FGnd
Indicated by white outline
128 Output Pins per/buffer
6 Ribbon cables (Horizontal Grids)
768 Total Horizontal Grids controlling Vertical resolution
69
-
BLACK LEAD ON "ANY"
OUTPUT LUG.
READING 0.78 V
RED LEAD ON "ANY"
OUTPUT LUG.
READING "OPEN"
Preliminary Information 42PQ30
- Quick Links:
- 42Pq30 Circuit Board Layout
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Table of Contents
Troubleshooting
