Sharp 66GF-63 (serv.man3) Service Manual ▷ View online
DA100 (50Hz) and DA50W Chassis – Repair Notes
Page 7 of 80
Introduction
The DA100 (50Hz) chassis and its derivatives (DA50W) are fitted in many Sharp widescreen television sets.
Production started in 1999 with the FW models and continued up to the HW models. There have been a number
of changes to the circuit configuration, layout and operation but the overall circuit theory and fault finding
techniques remain the same for all chassis.
This article will endeavour to assist the engineer in various faultfinding procedures that have been found to be
beneficial in reducing repair times and cost. One important item to note is that the large and expensive
(microprocessor, VDP, MSP, etc) IC’s only rarely fail.
It is worthwhile considering that there have been a number of different types of CRT used with this chassis for
the same model type. Philips, Thomson (Videocolor) and LG CRT have been used. Note that the scanning coils are
supplied with the CRT and therefore the horizontal output stage components will be different for different CRT
types. With the Philips CRT there are two focus anodes, so the fly-back transformer is also different in these
models.
Most of the problems on this chassis are related to either the power circuits (chopper and horizontal) or
memory. Resetting or replacing the memory can easily cure many faults that appear to lie in the picture
processing circuitry or drive areas.
Production started in 1999 with the FW models and continued up to the HW models. There have been a number
of changes to the circuit configuration, layout and operation but the overall circuit theory and fault finding
techniques remain the same for all chassis.
This article will endeavour to assist the engineer in various faultfinding procedures that have been found to be
beneficial in reducing repair times and cost. One important item to note is that the large and expensive
(microprocessor, VDP, MSP, etc) IC’s only rarely fail.
It is worthwhile considering that there have been a number of different types of CRT used with this chassis for
the same model type. Philips, Thomson (Videocolor) and LG CRT have been used. Note that the scanning coils are
supplied with the CRT and therefore the horizontal output stage components will be different for different CRT
types. With the Philips CRT there are two focus anodes, so the fly-back transformer is also different in these
models.
Most of the problems on this chassis are related to either the power circuits (chopper and horizontal) or
memory. Resetting or replacing the memory can easily cure many faults that appear to lie in the picture
processing circuitry or drive areas.
Figure 1: DA100 (50Hz) Chassis – model 56FW53H
Sharp Electronics (UK) Limited - May 2003
Revision 3
DA100 (50Hz) and DA50W Chassis – Repair Notes
Page 8 of 80
Sharp Electronics (UK) Limited - May 2003
Revision 3
Product Specifications
The basic chassis comes with NICAM and fast text as standard and can drive CRT’s from 56 to 76cm in both 4:3
and 16:9 formats. The only 4:3 sets that use this chassis are the 59ESD7H and 66ESD7H, both of which are
Dolby Pro-Logic models.
All variants of this chassis are fitted with three SCART sockets on the rear of the board – composite video, S-
Video and RGB can be fed into these sockets. In addition to this, some models have front AV sockets (phono and
S-Video).
All Dolby Pro-Logic models have full functionality, allowing connection of separate speakers for front left, front
right, rear left, rear right and sub-woofer. In the Pro-logic mode (once correctly set up in the user menu) the
internal speakers – left, right and centre - become the centre channel.
and 16:9 formats. The only 4:3 sets that use this chassis are the 59ESD7H and 66ESD7H, both of which are
Dolby Pro-Logic models.
All variants of this chassis are fitted with three SCART sockets on the rear of the board – composite video, S-
Video and RGB can be fed into these sockets. In addition to this, some models have front AV sockets (phono and
S-Video).
All Dolby Pro-Logic models have full functionality, allowing connection of separate speakers for front left, front
right, rear left, rear right and sub-woofer. In the Pro-logic mode (once correctly set up in the user menu) the
internal speakers – left, right and centre - become the centre channel.
Model
Screen
Size
Fast Text
NICAM
Pro-Logic
Double
Copper
Copper
CRT Types
Production
28HW53H 66cm
3
3
3
Thomson
2001 to 2002
32HW53H 76cm
3
3
3
Thomson
2001 to 2002
56FW53H 56cm
3
3
3
Philips/Thomson
1999 to 2002
66FW53H 66cm
3
3
Thomson/LG
1999 to 2001
66FW54H 66cm
3
3
3
Thomson/LG
1999 t0 2001
66FW54H 66cm
3
3
3
Thomson/LG
2000 to 2002
66GF63H 66cm
3
3
3
Philips/Thomson
2000 to 2002
66GF64H 66cm
3
3
3
3
Philips
2000 to 2002
76FW53H 76cm
3
3
Thomson/LG
1999 to 2001
76FW54H 76cm
3
3
3
Thomson/LG
1999 to 2001
76FW54H 76cm
3
3
3
Thomson/LG
2000 to 2002
76GF63H 76cm
3
3
3
Philips
2000 to 2002
76GF64H 76cm
3
3
3
3
Philips
2000 to 2002
In some FW and GF models, and in all HW models, an earth plane was added to the top surface of the PWB
(double copper), this is green in colour. This reduces interference and the possible corruption of the NVM
caused by power supply variations and CRT discharges. It is possible to identify these chassis as the fourth digit
of the serial number starts with the number 5.
In later FW sets, a power factor module was fitted as a separate PWB. This was connected between the output
of the mains bridge rectifier and the main smoothing block. Its function is to ensure that the current/voltage
draw from the mains is kept in sync. This eliminates ‘spikes’ or ‘troughs’ in the mains voltage waveform which
keeps the electricity suppliers happy.
Note that the first three digits before the serial number are in fact the month and year of manufacture, i.e.
201
512112 is January 2002.
DA100 (50Hz) and DA50W Chassis – Repair Notes
Page 9 of 80
Sharp Electronics (UK) Limited - May 2003
Revision 3
IC Identification
Several different types of IC are used in the DA100 (50Hz) chassis. These are listed in the table below. Note
that although these IC’s may be available from other sources, it is strongly recommended to obtain these
directly from Sharp Electronics (UK) Limited, or their approved distributors, using the part numbers given below.
There can be compatibility issues when incorrect IC’s are fitted - even if they have the correct type number.
that although these IC’s may be available from other sources, it is strongly recommended to obtain these
directly from Sharp Electronics (UK) Limited, or their approved distributors, using the part numbers given below.
There can be compatibility issues when incorrect IC’s are fitted - even if they have the correct type number.
IC Reference
Number
IC Type
Number
Sharp Part Number
Function
Package
Comment
Note
IC1001
ST10R272L
RH-IX1685BMZZ
Microprocessor
SMD
Fitted to all models
IC1002
27C4000
Depends on model
EPROM/OTP/MTP
DIL
See note
1
IC1003
24645
RH-IX1603BMZZ
NVM
SMD
Fitted to all models
IC1004
24645 RH-IX1603BMZZ
NVM
SMD
See
note
2
IC1005
PST529
VHIPST529C2-1
Reset for IC1001
Wire
Fitted to all models
IC1300
BA4558
VHIBA4558F/-1
Centre speaker drive
SMD
Not 56FW53H
IC1302
TDA7480
VHITDA7480/-1
Centre speaker audio output
DIL
Not 56FW53H
IC1801
Depends on model
Cathode Drive Amplifier
QIL
Depends upon CRT base
3
IC201
TDA4472
RH-IX1672BMZZ
IF Processor
SMD
Fitted to all models
IC202
BA10393
RH-IX1556BMZZ
AFT Feedback
SMD
Fitted to all models
IC203
UPC574J
RH-IX0037CEZZ
33V Regulator (tuner)
Wire
Fitted to all models
IC301
TDA7480
VHITDA7480/-1
Audio output
DIL
Fitted to all models
IC302
TDA7480
VHITDA7480/-1
Audio output
DIL
Fitted to all models
IC304
M5218L VHIM5218L//-1 Headphone
Amplifier
DIL
Fitted to all models
IC305
MSP3410D
RH-IX1636BMZZ
Audio Processor
DIL
Fitted to all models
IC401
HEF4053
RH-IX1602BMZZ
Video switch
SMD
Fitted to all models
IC501
TDA7480
VHITDA7480/-1
Vertical Output
DIL
Fitted to all models
IC502
BA4558 VHIBA4558F/-1 Vertical
feedback
DIL
Fitted to all models
IC503
BA10393
RH-IX1556BMZZ
AGC and EW control
DIL
Fitted to all models
IC701
PST529
VHIPST529C2-1
Reset for IC702
Wire
Fitted to all models
IC702
ST6203
RH-IX1646BMZZ
Primary Control
SMD
Fitted to all models
IC703
MOC1806
RH-FX0106BMZZ
Opto from microprocessor
SMD
Fitted to all models
IC704
MOC1806
RH-FX0106BMZZ
Opto to microprocessor
SMD
Fitted to all models
IC705
MOC1806
RH-FX0106BMZZ
Power Supply FB
SMD
Fitted to all models
IC706
TL431
RH-IX1674BMZZ
Reference Zener
Wire
Fitted to all models
IC707
L4978
RH-IX1704BMZZ
+5V Regulator
SMD
Fitted to all models
IC708
TLP165J RH-FX0111BMZZ Degauss
Optical
Diac
SMD
Fitted to all models
IC801
Depends on model
Video/Deflection Processor
DIL
See note
4
DA100 (50Hz) and DA50W Chassis – Repair Notes
Page 10 of 80
Sharp Electronics (UK) Limited - May 2003
Revision 3
Note 1 – EPROM Types and Versions
FW Models
EPROM types and versions vary between CRT and Teletext IC types. Refer to the list below for more
information. The EPROM version is normally written on a paper label stuck to the top of the device.
56FW53H:
CRT Type
CRT Part Number
Megatext Type Megatext Part Number
EPROM Version
EPROM Part Number
Thomson VB56EGV230*1N SDA5275 RH-IX1709BMZZ H9-04x03 CH-IX1711CJH7
Philips VB56ESF0203*N
Philips VB56ESF0203*N
SDA5275 RH-IX1709BMZZ H9-05x03 CH-IX1711CJH5
Thomson VB56EGV230*1N SDA5273 RH-IX1673BMZZ H9-03x05
CH-IX1664CJH9
Philips VB56ESF0203*N
SDA5273 RH-IX1673BMZZ H9-02x05 CH-IX1664CJHG
66FW53H:
CRT Type
CRT Part Number
Megatext Type Megatext Part Number
EPROM Version
EPROM Part Number
Thomson VB66EGV2321£N SDA5275
RH-IX1709BMZZ
H5-04x03
CH-IX1711CJH6
Thomson VB66EGV2321£N SDA5273
RH-IX1673BMZZ
H5-03x04
CH-IX1664CJH5
LG
VB66QBD2910£N SDA5273
RH-IX1673BMZZ
H5-02x01
CH-IX1664CJH7
66FW54H:
CRT Type
CRT Part Number
Megatext Type Megatext Part Number
EPROM Version
EPROM Part Number
Thomson VB66EGV2321£N SDA5275 RH-IX1709BMZZ H6-03x03
CH-IX1664CJH6
LG VB66QBD2910£N
SDA5275
RH-IX1709BMZZ
H6-02x03 CH-IX1664CJHE
76FW53H:
CRT Type
CRT Part Number
Megatext Type Megatext Part Number
EPROM Version
EPROM Part Number
Thomson VB76EGV2321*N SDA5275 RH-IX1709BMZZ H5-04x03
CH-IX1711CJH6
LG VB76QAG280W12
SDA5275
RH-IX1709BMZZ H4-00x00 CH-IX1711CJH4
Thomson VB76EGV2321*N SDA5273 RH-IX1673BMZZ H5-03x04
CH-IX1664CJH5
LG VB76QAG280W12
SDA5273
RH-IX1673BMZZ
H5-02x01 CH-IX1664CJH7
76FW54H:
CRT Type
CRT Part Number
Megatext Type Megatext Part Number
EPROM Version
EPROM Part Number
Thomson VB76EGV2321*N SDA5275 RH-IX1709BMZZ H6-03x03
CH-IX1664CJHF
LG VB76QAG280W12
SDA5275
RH-IX1709BMZZ
H6-02x05 CH-IX1664CJHE
28HW53H and 32HW53H:
The part number for IC1002 for both of the above models is CH-IX1841CJH0
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