Sharp 66DW-18H (serv.man2) Service Manual ▷ View online
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference SP84001X
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV990107
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
PHILIPS CRT Original deflection yoke PWB shown on left
CONNE
Connector 1
Orange Yellow Green Yellow Green
Red Red Orange
Red Red Orange
To change the deflection yoke wiring from a Thomson CRT to a Philips CRT, proceed as
follows
follows
1. Unsolder both the green and yellow (FV) and red and orange (FH) leads from the
deflection yoke PWB.
2. Solder these leads to the Philips CRT as shown above.
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
neck of the CRT with lead QCNW-2757BMZZ.
KC lead
Sharp Electronics (UK) Limited
Reference JR031299-1
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991202
Month of Issue: December 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
76EF19H
76EF20H
SYMPTOM The following problems can occur on the 100Hz PWB.
•
Intermittent digital noise on the picture
•
Intermittent mosaic squares on the picture
•
Mosaic effect if the 100Hz PWB is tapped
•
Red, green or blue screen if the 100Hz PWB is tapped
CAUSE
Problems around the field mixer IC, SDA9270.
•
IC6108 in the 66DW18H and 76DW18H
•
IC6105 in the 76EF19H and 76EF20H
ACTION
Carry out the following counter measures.
1. Make sure that there are no dry joints on the Mother PWB
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
IC6108/IC6105
Note that you can operate the 100Hz PWB with the shield cans removed.
It is important that these are returned to there original condition when the job is
completed.
It is important that these are returned to there original condition when the job is
completed.
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference SP84001X
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV990107
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
PHILIPS CRT Original deflection yoke PWB shown on left
CONNE
Connector 1
Orange Yellow Green Yellow Green
Red Red Orange
Red Red Orange
To change the deflection yoke wiring from a Thomson CRT to a Philips CRT, proceed as
follows
follows
1. Unsolder both the green and yellow (FV) and red and orange (FH) leads from the
deflection yoke PWB.
2. Solder these leads to the Philips CRT as shown above.
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
neck of the CRT with lead QCNW-2757BMZZ.
KC lead
Sharp Electronics (UK) Limited
Reference JR031299-1
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991202
Month of Issue: December 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
76EF19H
76EF20H
SYMPTOM The following problems can occur on the 100Hz PWB.
•
Intermittent digital noise on the picture
•
Intermittent mosaic squares on the picture
•
Mosaic effect if the 100Hz PWB is tapped
•
Red, green or blue screen if the 100Hz PWB is tapped
CAUSE
Problems around the field mixer IC, SDA9270.
•
IC6108 in the 66DW18H and 76DW18H
•
IC6105 in the 76EF19H and 76EF20H
ACTION
Carry out the following counter measures.
1. Make sure that there are no dry joints on the Mother PWB
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
IC6108/IC6105
Note that you can operate the 100Hz PWB with the shield cans removed.
It is important that these are returned to there original condition when the job is
completed.
It is important that these are returned to there original condition when the job is
completed.
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference SP84001X
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV990107
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
PHILIPS CRT Original deflection yoke PWB shown on left
CONNE
Connector 1
Orange Yellow Green Yellow Green
Red Red Orange
Red Red Orange
To change the deflection yoke wiring from a Thomson CRT to a Philips CRT, proceed as
follows
follows
1. Unsolder both the green and yellow (FV) and red and orange (FH) leads from the
deflection yoke PWB.
2. Solder these leads to the Philips CRT as shown above.
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
neck of the CRT with lead QCNW-2757BMZZ.
KC lead
Sharp Electronics (UK) Limited
Reference JR031299-1
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991202
Month of Issue: December 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
76EF19H
76EF20H
SYMPTOM The following problems can occur on the 100Hz PWB.
•
Intermittent digital noise on the picture
•
Intermittent mosaic squares on the picture
•
Mosaic effect if the 100Hz PWB is tapped
•
Red, green or blue screen if the 100Hz PWB is tapped
CAUSE
Problems around the field mixer IC, SDA9270.
•
IC6108 in the 66DW18H and 76DW18H
•
IC6105 in the 76EF19H and 76EF20H
ACTION
Carry out the following counter measures.
1. Make sure that there are no dry joints on the Mother PWB
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
IC6108/IC6105
Note that you can operate the 100Hz PWB with the shield cans removed.
It is important that these are returned to there original condition when the job is
completed.
It is important that these are returned to there original condition when the job is
completed.
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference SP84001X
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV990107
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
PHILIPS CRT Original deflection yoke PWB shown on left
CONNE
Connector 1
Orange Yellow Green Yellow Green
Red Red Orange
Red Red Orange
To change the deflection yoke wiring from a Thomson CRT to a Philips CRT, proceed as
follows
follows
1. Unsolder both the green and yellow (FV) and red and orange (FH) leads from the
deflection yoke PWB.
2. Solder these leads to the Philips CRT as shown above.
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
3. Replace wire KC (QCNW-2775BMZZ) that connects from the CRT socket PWB to the
neck of the CRT with lead QCNW-2757BMZZ.
KC lead
Sharp Electronics (UK) Limited
Reference JR031299-1
Revision 2
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991202
Month of Issue: December 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
76EF19H
76EF20H
SYMPTOM The following problems can occur on the 100Hz PWB.
•
Intermittent digital noise on the picture
•
Intermittent mosaic squares on the picture
•
Mosaic effect if the 100Hz PWB is tapped
•
Red, green or blue screen if the 100Hz PWB is tapped
CAUSE
Problems around the field mixer IC, SDA9270.
•
IC6108 in the 66DW18H and 76DW18H
•
IC6105 in the 76EF19H and 76EF20H
ACTION
Carry out the following counter measures.
1. Make sure that there are no dry joints on the Mother PWB
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
2. Resolder IC6108/IC6105 by reflowing the device - it is not necessary to remove
IC6108/IC6105
Note that you can operate the 100Hz PWB with the shield cans removed.
It is important that these are returned to there original condition when the job is
completed.
It is important that these are returned to there original condition when the job is
completed.