PHILIPS PLASMA PWB DEFECTS - SYMPTOMS - Plasma TV Screen Faults

                                          [2]

SYMPTOM	DESCRIPTION	RELATED BOARD
No voltage output	Operating voltages doesn’t exist.	PSU
No display	Operating voltage exists, but no display	Y-main, X-main, Logic main, Connections.
Abnormal display	Abnormal image	Y-Main, X-main, Logic Main.
Sustain open	Some horizontal lines doesn’t exist on the display	Scan Buffer, FPC of X | Y
Sustain short	Some horizontal lines appear to be linked on display	Scan buffers, FPC of X | Y
Address open	Some vertical lines don’t exist on the display	Logic Main, Logic Buffer, FFC, TCP
Address short	Some vertical lines appear to be linked on display	Logic Main, Logic Buffer, FFC, TCP

ADDRESS OPEN [vertical stripe]

ADDRESS SHORT [vertical stripe]

ADDRESS OUTPUT ERROR -1

ADDRESS OUTPUT ERROR - 2

SUSTAIN OPEN {One or more line, horizontal direction, do not light up in sustain direction}

SUSTAIN SHORT -1 {Combined or adjacent lines are in sustain short direction.  The line appear brighter than the other at the ramp gradation pattern or low gradation pattern.

SUSTAIN SHORT - 2

ADDRESS BLOCK & LINE OPEN

ADDRESS BLOCK & SUSTAIN OPEN

DIELECTRIC MATERIAL LAYER DAMAGE:
Symptom:  Phosphor damage caused by the damage of address bus dielectric layer appears in the panel discharge/ non discharge area.  Sustain  also open/short occurs by the damage  of address sustain printout.  Cause: Layer uneven / abnormal voltage/ foreign material repair failed.
FULL WHITE LOW DISCHARGE:  Low discharge caused  by unstable cells occurring at a full white pattern if high or normal temperature.
Example 1

Weak discharge:  Normal discharge, but cells appear darker to weak light emission occurring mainly at low full white/red/green/blue pattern or graduation pattern.

DEFECTIVE TCP.

42" SDV2 MODULE LAYOUT