CTV990107CTV991202
Month of Issue: January 1999Month of Issue: December 1999
Classification: White Classification: White
TELEVISION TECHNICAL BULLETINPage 3 of 3TELEVISION TECHNICAL BULLETIN Page 1 of 1
PHILIPS CRTOr iginal deflection yoke PWB shown on left
MODELS66DW18H 76DW18H 76EF19H 76EF20H
CONNEConnec tor 1
SYMPTOM The following problems can occur on the 100Hz PWB.
Orange Yellow Green Gr e en Yellow
Red Red " Intermittent digital noise on the picture Orange
" 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
KC leadCAUSE 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
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.
To change the deflection yoke wiring from a Thomson CRT to a Philips CRT, proceed as
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
neck of the CRT with lead QCNW-2757BMZZ.
Sharp Electronics (UK) Limited
Sharp Electronics (UK) LimitedReference JR031299-1
OriginatoAvrW Supervisor Approval DSPa84te00 /1X / Reference Revision 2
Revision 2
White - Carry out as required, Yellow - Carry out as required and whenever the unit comes in flo unr sitersvice, Red - Carry out on alWhite Carry out as required, Yellow Carry out as required and whenever the unit comes in for service, Red Carry out on all units |
ACEC
SHARP
