Protector Code On 7-Segment Led - Sony VPH-G90U Service Manual

2-3-2. Protector Code on 7-Segment LED

Error no. LED color Note
60 Orange Unknown
61 Orange POW1
62 Orange POW2
63 Orange POW3
64 Orange POW4
65 Orange POL
66 Orange H.STOP
67 Orange V.STOP
68 Orange SUB
69 Orange HV
6A Orange LOT
6B Orange Ik
ΣIk
6C Orange
6D Orange FAN1
6E Orange FAN2
6F Orange LENS
70 Orange CRTR
71 Orange CRTG
72 Orange CRTB
73 Orange IFBB
74 Orange IFBC
2-26
Description
In this mode, the reason why the protect works is unknown. There is no way other than
inspecting GA/GB board steadily or checking each protect detection line on YA board.
This protect works when the 200V line of the power source has dropped. Since this line is
used only on PA board, the points to look into are GB/PA/L (it contains the power protect
circuit)/M board.
This protect works when the 115 V line of the power source has dropped. This line is used
on PA/PE/ED/CDR/CDG/CDB boards, therefore, the points to look into are these boards
and GB, L and M boards. The past experiences tell that the defects were often found at
the VIDEO PACK of C board.
This protect works when the 50 V line of the power source has dropped. This line is used
on DC/EBR/EBG/EBB boards. There are two possible modes for which this protect works.
One is the case of failure on the OUT circuit of the above boards. This case can be readily
found out because the error code of each board is displayed simultaneously. Another case
is caused by the excessive Reg/Mg compensation. In this case, it is necessary to look into
whether the Reg/Mg compensation wave forms are normal. If they are abnormal, look into
DA/DB/DD/DE board or YA board.
This protect works when the 15 V line of the power source has dropped. This line is used
on most of boards. It is rare that this error is displayed alone. The error code is always
displayed by any other board at the same time. If the error is displayed alone, look into
GB/LM boards.
This protect concerns with the polarity change. As the possible causes of error, the cover
for polarity change is open or the connector in this line is disconnected.
This protect works when the horizontal deflection is inactivated. The most possible failure
is H.OUT of E board. If not, failures might be found in H. Drive series or the negative
power source series. Look into DA/EA/ED/PD board.
This protect works when the vertical deflection is inactivated. In most cases, inspection of
DF board will solve the problem.
This error code comes from DC board. Failures around OUT/Reg might be considered.
Refer to the protect items for POW3.
This protect works when the high voltage rises high. Failures of PA board/PB board/HV
BLOCK/HV FILTER might be considered. In some cases, the connector of the detection
lines of HV BLOCK is disconnected.
Failure around L.O.T. of the PE board.
This protect works when the current excessively flows to the CRT of any of R, G and B.
Since it is for protection from X-ray, it may be hardly activated. If indicated, look into BA
board.
This protect works when abnormality occurred in the CRT. If no defect is found in the
CRT, look into PA/PB boards.
This protect works when any of four FANs attached at the rear of the unit stopped. In
some cases, it is caused by the failure of FAN itself. In other cases, the connector is
disconnected or the line materials are caught in.
This protect works when the FAN at the far end of PA board stopped.
This protect works when the detection line attached to the LENS of any of R, G and B is
disconnected. In some unusual cases, it works due to poor connection of the screw.
This protect works when the current excessively flows to RED CRT. Look into CAR/CBR/
CDR boards. If no defect is found, suspect RED CRT.
This protect works when the current excessively flows to GREEN CRT. Look into CAG/
CBG/CDG boards. If no defect is found, suspect GREEN CRT.
This protect works when the current excessively flows to BLUE CRT. Look into CAB/CBB/
CDB boards. If no defect is found, suspect BLUE CRT.
This protect works with the defect of the board inserted into INPUT-B.
This protect works with the defect of the board inserted into INPUT-C.
VPH-G90E/G90U/G90M