Sony CDX-GT40U Service Manual page 7

ABOUT CHANGE OF THE LCD DRIVER IC (IC901) ON
THE KEY BOARD
In this set, the LCD driver IC (IC901) on the KEY board has been
changed in the midway of production.
The following changes are performed by this change.
• Change of the KEY board (suffi x-21/-22)
(Refer to supplement-2)
• Change of part No. of the FRONT PANEL OVERALL ASSY
(Refer to page 44, 52 and 53)
• Change of part No. of the complete MAIN board
(Refer to page 43 and 48)
• Change of part for Ref No. IC501 on the MAIN board
(Refer to page 50)
Since all the above-mentioned change is synchronous change,
there is not compatibility of new type/former type in the front
panel side and main unit side.
Do the work after necessarily referring to following "New/former
discrimination".
Note: When the parts of new front panel and the parts of old
main unit are combined, this unit does not operate nor-
mally.
New/former discrimination:
Three kinds of following distinguish methods exist.
• Distinguish method by serial number printed on the model
number label (Refer to right side for the serial number).
– Main unit (Bottom side) –
Model number label
• Distinguish method by part No. printed on the KEY board
– KEY Board (Side A) –
Former type : 1-884-821-11
New type
• Distinguish method by LCD driver IC (IC901) on the KEY
board
– KEY Board (Side B) –
CDX-GT40U/GT40UW/GT42UE/GT44U/GT45U/GT47UE
Displayed characters/values
are example.
: 1-884-821-21
or
1-884-821-22
IC901
Former type : LC75839
New type : PT6587-LQ
Serial number
Model Destination
US and Canadian
models*
Canadian model (for
CXS-GT4016F)
CDX-
GT40U
AEP and UK
models
Russian model
CDX-
US model
GT40UW
CDX-
Russian model
GT42UE
AEP and UK
models
CDX-
GT44U
Indian model
E model
Saudi Arabia model
CDX-
Mexican model
GT45U
Argentina model
Korean model
CDX-
Russian model
GT47UE
*CXS-GT4016F (US model) is Former type only.
Ver. 1.3
Former type New type
1864691 or 1864692
smaller or lager
1554521 or 1554522
smaller or lager
1885791 or 1885792
smaller or lager
1822499 or 1822500
smaller or lager
1864116 or 1864117
smaller or lager
1850792 or 1850793
smaller or lager
1939738 or 1939739
smaller or lager
1865831 or 1865832
smaller or lager
1811434 or 1811435
smaller or lager
1878981 or 1878982
smaller or lager
1838226 or 1838227
smaller or lager
1798061 or 1798062
smaller or lager
1826514 or 1826515
smaller or lager
1858886 or 1858887
smaller or lager
7