AV-14F1P
n X-RAY PROTECTION CHECK
Measuring
Item Test point Adjustment partDescription
instrument
Check ofPins 1 and 3l Prepare the following resistor.
X-RAY 15.0kW ?1% 1/4W
PROTEC-[X Connector1. Turn on the power and receive any signal.
TIONon MAIN2. Connect the resistor between pins 1 and 3 of the X connector
PWB]on the Main PW Board.
3. Make sure that the picture disappears.
4. Unplug the AC power cord.
5. Disconnect the resistor from the X connector.
X-RAY PROTECTOR
6. Plug the AC power cord and make sure that the picture ap-
Apears normally.D562
R562FR561 D561
TO HVT
X-Ray Protector Operation:
+
C561Normally the voltage at point "A" does not exceed the Zener volt-R563
age of D562. (The voltage at point "A" will be determined by divid-
ing the voltage from HVT (FBT) by R562 and R563.)
When you connect a resistor of 15.0kW or less in parallel with
MAIN PWB
R562, the voltage at point "A" is increased, D562 turns ON, and
3 2 1
the X-ray protection circuit is activated. Once it is activated, you
X
need to unplug the AC power cord to restore the X-ray protection
circuit.
15.0kW 1% 1/4W
No. 5608422 |
ACEC
