Sony TRINITRON KV-29FS150 - Page 9

KV-29FS150
KV-29FS150
9
Self-Diagnostic Circuit
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC804
V.OUT
A BOARD
IC001
SYSTEM
A BOARD
IC003
MEMORY
FROM
CV BOARD
IC751 PIN 5
IK
EHTO
RED LED
DISPLAY
SDA1
V.GUARD
SDA
5
F.B-PLS
3 1384
32
122
A BOARD
FROM
Q816
COLLECTOR
99
+B overcurrent (OCP)
Occurs when an overcurrent on the +B (135V) line is detected by pin 32 of IC001 (A Board). If the voltage of pin 32 of IC001 (A Board) is more than 4V
when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.
V-Protect
Occurs when an absence of the vertical defl ection pulse is detected by pin 13 of IC001 (A Board). Power supply will shut down when waveform interval
exceeds 2 seconds.
IK (AKB)
If the RGB levels* do not balance within 15 seconds after the power is turned on, this error will be detected by IC001 (A Board). TV will stay on, but there
will be no picture.
Power Supply NG (+5V) for Video Processor
Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to improper power supply to IC001. The TV cuts off high voltage
power of anode CRT. No picture will be detected. eg: faulty IC602 or IC604