Self-Diagnostics; Power On; Self-Diagnostic Indication - Sony KV-13FS100 Product & Training Manual

Power ON

When the unit is plugged into an AC outlet, power is supplied to the Standby Power Supply and the unit is in
Standby Mode. The Standby Power Supply powers-up the System Control, EEPROM, IR Remote sensor and
Reset circuits (reference Power Supply section for details). If a Power-ON command is received after reset is
completed, the System Control outputs command to power-up the rest of the unit. When operating correctly, the
following sequence of events should occur:
•
The AC power relay clicks.
•
One second later the degauss relay clicks and the hum of the DGC can be heard for about two seconds.
•
The degauss relay will then click again (turning OFF).
•
Picture is displayed.
This entire sequence occurs in the first five to ten seconds the unit is powered ON. During this time, the Standby/
Timer LED will be flashing once per second.

Self-Diagnostic Indication

In the Power Supply, Deflection and Protection sections of this book, a number of failure detection circuits
(protection) were discussed. Here is a summary of those circuits:
•
IC600/pin9 OCP
•
IC600/pin8 OCP, OVP, and UVP
•
IC001/pin 72 (+135 OCP, HV OVP)
•
IC001/pin 78 (No Vertical deflection, No horizontal Output)
Any one of these defects will activate the self-diagnostics programmed in the unit and depending on the type of
failure, the Standby/Timer LED will flash in a designated sequence. Use the Table 8-1 for a quick reference in
understanding self-diagnostic indications.
Diagnostic
Description
Power does not
turn on
HV OVP
(AC relay OFF)
+135V (B+) OCP
(AC relay OFF)
I-PROT
(AC relay OFF)
IK (AKB)
N/A in
version 1.
Chapter 8 - Self-Diagnostics
Table 8-1 – Self-Diagnostics
Standby/Timer
LED Flash
Sequence
Does not light
2 times
2 times
4 times
5 times
IC001,
Failure History Probable Cause
Display
N/A - AC power disconnected
- Fuse F601 open
N/A - HD output over-driving FBT
- FBT defective
2:0 or 2:1 - H-out (Q505 or Q506)
shorted
- IC1751 is shorted (CV brd)
4:0 or 4:1 - +13V missing on IC545
- IC545 defective
- No HD to FBT (open circuit)
5:0 or 5:1 - IC545 defective
- IC001 defective
- G2 is improperly adjusted
37

8. Self-Diagnostics