Philips PDP42V7 series User Manual

Service Modes, Error Codes, and Fault Finding
EN 14 LGE PDP5.
Figure 5-22 Check drive connectors
Scan IC Check
Check diode value of the right side part of the output pin.
Figure 5-23 Scan IC output diode check
5.1.5 Line Defect (Horizontal)
FPC Check
In case of one or more horizontal lines, this is probably due to
FPC or panel inside the Control board. Y board is just normal.
Figure 5-24 Open FPC electrode / Panel electrode breakdown
Scan IC Check
Check diode value of the right side part of the output pin.
Figure 5-25 Scan IC output diode check
5.1.6 Mis-discharge Defect
Most of mis-discharge appearance is a problem of Y-DR, Y-
SUS, or Z board.
Check these boards when mis-discharge occurs.
Figure 5-26 Mis-discharge
Checking Order
1. Check Y- and Z-SUS signal cable.
2. Check if Y-DRV IC is defective.
3. Check Y-SUS board voltages (-Vy, Vscw)
4. Check if Y- and/or Z-SUS IPM are defective (see
paragraph "How to Check IPM" below).
5. Replace Control board
How to Check IPM
Forward direction
Measure between:
• GND (+) and Sus-out (-).
• Sus-out (+) and Vs (-).
When each two test diode values is over 0.4V => OK.
Reverse direction
Measure between:
• GND (-) and Sus-out (+).
• Sus-out (-) and Vs (+).
When each 4 nodes test diode values is infinite => OK
Disconnected
Screen off
F_15590_086.eps
060705
Normal diode value= 0.6 (forward)
F_15590_087.eps
060705
Normal diode value= OL (reverse)
Horizontal 1 line.
FPC electrode open
F_15590_089.eps
070705
Panel electrode
Insulation break down
F_15590_091.eps
290605
F_15590_093.eps
070705

Philips PDP42V7 series Specifications

General

Brand	Philips
Model	PDP42V7 series
Category	TV
Language	English