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66FW-54H
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80
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Service Manual
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TV / CTR / DA100 Repair Notes
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66fw-54h.pdf
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Sharp 66FW-54H Service Manual ▷ View online

DA100 (50Hz) and DA50W Chassis – Repair Notes 
 
Page 6 of 80 
Sharp Electronics (UK) Limited - May 2003 
 
Revision 3
 Figure 43: Centre Speaker PWB Location................................................................................................................................44 
Figure 44: Centre Speaker Circuit Diagram..............................................................................................................................44 
Figure 45: Centre Speaker Modification 1 ................................................................................................................................45 
Figure 46: Centre Speaker PWB Modification 2......................................................................................................................46 
Figure 47: Pro-Logic PWB..............................................................................................................................................................47 
Figure 48: Dolby Pro-Logic Circuit Diagram (66GF64H)........................................................................................................48 
Figure 49: Dolby Pro-Logic PWB Connector ..............................................................................................................................49 
Figure 50: Communication Block Diagram ..................................................................................................................................50 
Figure 51: Reset Timing ................................................................................................................................................................. 51 
Figure 52: Audio Protection Circuit ............................................................................................................................................52 
Figure 53: Horizontal Mute Circuit.............................................................................................................................................52 
Figure 54: AV Link Schematic Diagram......................................................................................................................................53 
Figure 55: Internal Architecture of IC801 (VDP 3120) ........................................................................................................56 
Figure 56: VDP Protection Circuits .............................................................................................................................................58 
Figure 57: Position of C824 ..........................................................................................................................................................59 
Figure 58: Picture Rotation Circuit (located on CRT PWB) ...................................................................................................60 
Figure 59: Scan Velocity Modulator Circuit.............................................................................................................................. 61 
Figure 60: SVM and Tilt Coil Connectors...................................................................................................................................62 
Figure 61: CRT Base PWB Modification (66cm and 76cm sets only) ...................................................................................63 
Figure 62: Fault Finding Flow Chart 1.........................................................................................................................................65 
Figure 63: Fault Finding Flow Chart 2 ........................................................................................................................................66 
Figure 64: LED Fault Code Table.................................................................................................................................................67 
Figure 65: HW OPC LED Error Code Jig ...................................................................................................................................67 
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. 
 
  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. 
 
Model 
Screen 
Size 
Fast Text 
NICAM 
Pro-Logic 
Double 
Copper  
CRT Types 
Production 
28HW53H 66cm 
 
Thomson 
2001 to 2002 
32HW53H 76cm 
 
Thomson 
2001 to 2002 
56FW53H 56cm 
 
Philips/Thomson 
1999 to 2002 
66FW53H 66cm 
 
 
Thomson/LG 
1999 to 2001 
66FW54H 66cm 
 
Thomson/LG 
1999 t0 2001 
66FW54H 66cm 
 
Thomson/LG 
2000 to 2002 
66GF63H 66cm 
 
Philips/Thomson 
2000 to 2002 
66GF64H 66cm 
Philips 
2000 to 2002 
76FW53H 76cm 
 
 
Thomson/LG 
1999 to 2001 
76FW54H 76cm 
 
Thomson/LG 
1999 to 2001 
76FW54H 76cm 
 
Thomson/LG 
2000 to 2002 
76GF63H 76cm 
 
Philips 
2000 to 2002 
76GF64H 76cm 
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. 
 
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 
IC1003 
24645 
RH-IX1603BMZZ 
NVM 
SMD 
Fitted to all models 
 
IC1004 
24645 RH-IX1603BMZZ 
NVM 
SMD 
See 
note 
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 
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 
 
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