Panasonic PT53TW53G - 53" PROJECTION TV HD, Service Manual

Page: 6 / 246

Note:
Reinsert the anode lead into the FBT distributor until it is tightly and fully seated. Turn the
locking cap clockwise to lock in place.
(EHT) Protector operation check
With the cabinet back removed, apply a nominal 120V A.C. to the PTV.
Over voltage test
Preparation:
1. Turn PTV “OFF”
2. Connect a NTSC signal generator to the antenna terminal.
3. Connect DVM positive lead to D31 pin 2 and negative lead to D31
pin 1 on D-Board
H.V. measurement
4. Connect a H.V. meter (static type, class 0.1) with high voltage
leads to high voltage distributor on FBT.
DVM and power supply connection
5. Connect the 15 ~ 25 V DC variable power supply positive lead to
D34 or IC802 pin 2 (D Board) and negative lead to heat sink of
Q551 or D825
Procedures:
1. Apply a NTSC white pattern.
6