INF-32
SECTION 1 SERVICE INFORMATION
6. 3. Troubleshooting
* The letters in the left of inspection items indicate the P.C. Boards related to their respective descriptions.
* Please check items with the interlock switch on.
■ Power does not turn ON. ([POWER] LED does not light in red)
■ Lamp does not turn ON.
A
Check the connection of each connector
AC inlet - K9002, K9006B, K9301 - A15, K9302 - A17
NG
A Connect the cables properly
Confirm the connection of each connector on A-P.C Board
and lamp.
Confirm the lamp fixing screws.
NG
Connect the cables properly
A
Disconnect the connectors [A15], [A17]. Check the
short circuit between pins (5)-(8), (10)-(8), (14)-(15) of
connector [A15], and pins (2)-(5) of connector [A17].
NG
A
Replace the [A] P.C.Board
Confirm the lamp condition
NG
Replace the lamp
Is each thermal sensor operating in normal?
NG
Check each thermal sensor and connection
A Confirm that the short circuit between pins (1) and (3) of connec-
tor [K9201] (DC 380V is observed in normal)
NG
A Check or replace [P] P.C.Board
Is each fan rotating when the projector turns on?
NG
Check each fan and connection
A Confirm that the voltage at pin (4) of connector [A25] changes
from Low to Hi when the power is ON.
NG
A Check or replace [A] P.C.Board
A Confirm that the voltage at pin (2) of connector [A15] changes
from Low to Hi when the power is ON.
NG
A Check or replace [A] P.C.Board
P Check and replace the [P] P.C.Board
Next page
OK
OK
OK
OK
OK
OK
OK
OK
OK
Summary of Contents for PT-EZ770Z
Page 8: ...8 PREFACE...
