Sharp 28JW-73H User manual
1
28JW-73H
MODEL 28JW-73H
PAL I SYSTEM COLOUR TELEVISION
SE0028JW73H00
SERVICE MANUAL
Issued: 21st May 2002
This document has been published to
be used for after sales service only.
GA-20 CHASSIS
In the interests of user safety (required by safety
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
CONTENTS
ELECTRICAL SPECIFICATIONS ................... 3
IMPORTANT SERVICING NOTES ................. 4
CONTROLS & TERMINALS ........................... 5
ADJUSTMENT PROCEDURES ...................... 7
POSTCODE RESET ...................................... 11
LED FLASHING CODES ............................... 12
PRINTED WIRING BOARDS ........................ 13
CHASSIS LAYOUT ......................................... 19
ICs ADDITIONAL INFORMATION .................. 21
SCHEMATIC DIAGRAMS ............................... 36
TROUBLESHOOTING TABLES ..................... 49
PARTS LISTING ............................................. 52
PACKING OF THE SET & ACCESSORIES ... 61
SOURCE OF DOCUMENTATION .................. 62
SHARP CORPORATION
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-:+
HOW TO OPEN THE DOOR
Press the top of the door, opening it slightly
hook your finger inside and pull open.
Behind the door
10. Headphone Socket (3.5mm / 16 600 ohms)
11. S-Video input terminal
12. Video Input Terminal (PAL/SECAM/NTSC)
13. Audio Input Terminal (left)
14. Audio Input Terminal (right)
REAR TV
21-pin In/O t
1. 21-pin Audio/Video (AV-2)
With PAL/SECAM/NTSC Video Input
2. 21-pin Audio/Video (AV-1)
With PAL/SECAM/NTSC/S-Video Input
3. 21-pin Euro SCART (RGB)
With PAL/SECAM/NTSC Video Input
RF Inp t
4. Aerial terminal
2 3 4 1
L/S/G/I R/D/D/D
AUDIO
S-VIDEO VIDEO
5
FRONT
REAR
R
R
L
L
WOOFER
AV-2
AV/TERMINAL
AV-1
AV/TERMINAL
RGB
SCART
PERI TELEVISION
4
2 3
1
&21752/67(50,1$/6
■FRONT TV
1.
Main power button
2.
Power indicator
3.
Remote control sensor
4.
Volume DOWN button
5.
Volume P button
6.
Channel DOWN button
7.
Channel P button
8.
Door
2 3 4 5 6 7 1 8
Behind the door
1.
S-VIDEO input terminal
2.
VIDEO input terminal (PAL/SECAM/NTSC)
3.
A DIO input terminal (left)
4.
A DIO input terminal (right)
5.
Headphone jack (3.5mm / 16~600 ohms)
■REAR TV
21-pin In/Out
1.
21-pin Audio/Video (AV-2)
With PAL/SECAM/NTSC Video Input
2.
21-pin Audio/Video (AV-1)
With PAL/SECAM/NTSC/S-Video Input
3.
21-pin Euro SCART (RGB)
With PAL/SECAM/NTSC Video Input
RF Input
4.
Aerial terminal
-:+
TV 1. Stand-by ON/OFF switch (TV)
Video 2. Power ON / OFF switch (VCR)
TV 3. Digit buttons 0 ∼ 9
4. Flashback button
Teletext 5. Colour button (green)
6. Colour button (red)
TV 7. Volume DOWN/Cursor control
LEFT
8. Menu button
Teletext 9. Reveal button
10. List selector
11. Store button
12. Cancel button
13. Half page button
14. Cursor button
TV 14. Sub-titles button
Video 15. Rewind/picture search/reverse
16. Play button
17. Pause / Still button
18. Stop button
TV 19. TV / VIDEO selector
20. Call button
21. Single/Double entry
Teletext 22. Colour button (yellow)
23. Colour button (cyan)
TV 24. Channel UP/Cursor control UP
25. Volume UP/Cursor control RIGHT
26. Channel DOWN/Cursor control
DOWN
27. Wide Mode selector
TV /Teletext 28. Time button
TV 29. Sound mode selector
Teletext 30. Hold button
TV 31. Sound Mute button
Teletext 32. Text/Mix/Picture button
33. Index button
Video 34. Channel Up selector
35. Fast forward/picture search/forward
36. Channel Down selector
37. Record button
8
?
Ii
LIST
X
TV / VCR / TEXT REMOTE CONTROL
G1065SA
TV/VIDEO
0
MENU
CH
VCR
S
I/II/I+II
TV VCR
TV
CH
CH
2
5
1
4
7 9
6
3
32.
34.
33.
31.
35.
36.
37.
30.
29.
27.
28.
25.
26.
24.
23.
20.
19.
21.
22.
2.
3.
1.
4.
5.
6.
7.
8.
9.
10.
11.
13.
14.
15.
16.
17.
18.
12.
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ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±14V; RL= 8Ω; RS= 50Ω;
Rf= 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; Tamb = 25°C unless otherwise specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
SSupply Range ±10 ±16 V
IqTotal Quiescent Current RL= ∞; NO LC Filter 25 40 mA
VOS Output Offset Voltage Play Condition –50 +50 mV
POOutput Power THD = 10%
THD = 1% 8.5
610
7W
W
RL= 4ΩVCC = ±10.5V
THD = 10%
THD = 1% 10
7W
W
Pd(*) Dissipated Power at 1W Output
Power Rf= 12KΩ PΟ= 1W 1 W
PDMAX Maximum Dissipated Power PΟ= 10W THD 10%
Rth-j-amb = 38°C/W (Area 12cm2)1.8 W
ηEfficiency ≡ PO
PO+PD≡PO
PI(**) THD 10%
Rth-j-amb = 38°C/W (Area 12cm2)80 85 %
THD Total Harmonic Distortion RL= 8Ω; PO= 0.5W 0.1 %
Imax Overcurrent Protection
Threshold RL= 0 3.5 5 A
TjThermal Shut-down Junction
Temperature 150 °C
GVClosed Loop Gain 29 30 31 dB
eNTotal Input Noise A Curve
f = 20Hz to 22KHz 7
12 µV
µV
RiInput Resistance 20 30 KΩ
SVR Supply Voltage Rejection f = 100Hz; Vr= 0.5 46 60 dB
Tr, TfRising and Falling Time 50 ns
RDSON Power Transistor on Resistance 0.4 Ω
FSW Switching Frequency 100 120 140 KHz
FSW_OP Switching Frequency Operative
Range 100 200 KHz
BFZero Signal Frequency
Constant (***) 1.4x109HzΩ
RFFrequency Controller Resistor
Range (****) 71214K
Ω
MUTE & STAND-BY FUNCTIONS
VST-BY Stand-by range 0.8 V
VMUTE Mute Range 1.8 2.5 V
VPLAY Play Range (1) 4 V
AMUTE Mute Attenuation 60 80 dB
IqST-BY Quiescent Current @ Stand-by 3 5 mA
*: The output average power when the amplifier is playing music can be considered roughly 1/10 of the maximum output power. So it is useful
to consider the dissipated power in this condition for thermal dimensioning.
**: PO= measured across the load using the following inductor:
COIL 58120 MPPA2 (magnetics) TURNS: 28 ∅ 1mm
COIL77120 KOOL Mµ (magnetics) TURNS: 28 ∅ 1mm
***: The zero-signal switching frequency can be obtained using the following expression: FSW = BF/RF
****: The maximum value of RFis related to the maximum possible value for the voltage drop on RFitself.
(1): For V12 >5.2V, an input impedance of 10KΩis to be considered.
-:+
063*,&
Fig. 1–1: Simplified functional block diagram of the MSP 34x0G
Source Select
Loud-
SCART1
SCART2
SCART1
SCART2
SCART4
SCART3
MONO
De-
modul tor
He dphone He dphone
I2S
Sound
Processing
spe ker
Sound
Processing
DAC
DAC
ADC
Loud-
DAC
DAC
ADC
Subwoofer
SCART
DSP
Input
Select
Pre-
processing
SCART
Output
Select
Presc le
Presc le
I2S1
I2S2
Sound IF1
Sound IF2
spe ker
Fig. 4–9: PQFP80 package
6
66
67
68
69
70
71
72
73
74
7
76
77
78
79
80
40
39
38
37
36
3
34
33
32
31
30
29
28
27
26
2
1 2 3 4 6 7 8 9 10 11 12 13 14 1 16 17 18 19 20 21 22 23 24
64 63 62 61 60 9 8 7 6 4 3 2 1 0 49 48 47 46 4 44 43 42 41
AVSUP
AVSUP
ANA_IN1+
ANA_IN−
ANA_IN2+
TESTEN
XTAL_IN
XTAL_OUT
TP
AUD_CL_OUT
NC
NC
D_CTR_I/O_1
D_CTR_I/O_0
ADR_SEL
STANDBYQ
CAPL_M
AHVSUP
CAPL_A
SC1_OUT_L
SC1_OUT_R
VREF1
SC2_OUT_L
SC2_OUT_R
NC
NC
DACM_SUB
NC
DACM_L
DACM_R
VREF2
DACA_L
NC
AVSS
AVSS
MONO_IN
NC
VREFTOP
SC1_IN_R
SC1_IN_L
ASG
NC
SC2_IN_R
SC2_IN_L ASG
SC3_IN_R
SC3_IN_L
ASG
SC4_IN_R
SC4_IN_L
NC
AGNDC
AHVSS
AHVSS
NC
NC
I2C_CL
I2C_DA
I2S_CL
I2S_WS
I2S_DA_OUT
I2S_DA_IN1
ADR_DA
ADR_WS
ADR_CL
NC
DVSUP
DVSUP DVSUP
DVSS
DVSS
DVSS
I2S_DA_IN2
NC
NC
NC
RESETQ
NC
NC
DACA_R
MSP 34x0G
-:+
063*,&
4.6.1. Absolute M ximum R tings
Stresses beyond those listed in the “Absolute Maximum Ratings” may cause permanent damage to the device. This
is a stress rating only. Functional operation of the device at these or any other conditions beyond those indicated in
the “Recommended Operating Conditions/Characteristics” of this specification is not implied. Exposure to absolute
maximum ratings conditions for extended periods may affect device reliability.
Symbol P r meter Pin N me Min. M x. Unit
T
A
Ambient Operating Temperature −070°C
T
S
Storage Temperature −−40 12 °C
V
SUP1
First Supply Voltage AHVSUP −0.3 9.0 V
V
SUP2
Second Supply Voltage DVSUP −0.3 6.0 V
V
SUP3
Third Supply Voltage AVSUP −0.3 6.0 V
dV
SUP23
Voltage between AVSUP
and DVSUP
AVSUP,
DVSUP
−0. 0. V
P
TOT
Power Dissipation
PLCC68
PSDIP64
PSDIP 2
PQFP80
PLQFP64
AHVSUP,
DVSUP,
AVSUP
1200
1300
1200
1000
960
mW
mW
mW
mW
mW
V
Idig
Input Voltage, all Digital Inputs −0.3 V
SUP2
+0.3 V
I
Idig
Input Current, all Digital Pins −−20 +20 mA
1)
V
Iana
Input Voltage, all Analog Inputs SCn_IN_s,
2)
MONO_IN
−0.3 V
SUP1
+0.3 V
I
Iana
Input Current, all Analog Inputs SCn_IN_s,
2)
MONO_IN
−+mA
1)
I
Oana
Output Current, all SCART Outputs SCn_OUT_s
2) 3)
,
4) 3)
,
4)
I
Oana
Output Current, all Analog Outputs
except SCART Outputs
DACp_s
2) 3) 3)
I
Cana
Output Current, other pins
connected to capacitors
CAPL_p,
2)
AGNDC
3) 3)
1)
positive value means current flowing into the circuit
2)
“n” means “1”, “2”, “3”, or “4”, “s” means “L” or “R”, “p” means “M” or “A”
3)
The analog outputs are short-circuit proof with respect to First Supply Voltage and ground.
4)
Total chip power dissipation must not exceed absolute maximum rating.
-:+
6.7.1. Absolute M ximum R tings
1)
Refer to Pin Circuits (chapter 6.6. on page 1 7)
Stresses beyond those listed in the “Absolute Maximum Ratings” may cause permanent damage to the device. This
is a stress rating only. Functional operation of the device at these or any other conditions beyond those indicated in
the “Recommended Operating Conditions/Characteristics” of this specification is not implied. Exposure to absolute
maximum ratings conditions for extended periods may affect device reliability.
Symbol P r meter Pin N me Min. M x. Unit
T
A
Ambient Operating Temperature
−
6
°
C
T
S
Storage Temperature
−
40 12 °C
P
TOT
Total Power Dissipation
−
1400 mW
VSUP
x
Supply Voltage VSUP
x
−
0.3 6 V
V
I
Input Voltage, all Inputs
−
0.3 VSUP
x
+0.3
1)
V
V
O
Output Voltage, all Outputs
−
0.3 VSUP
x
+0.3
1)
V
V
IO
Input/Output Voltage, all Open Drain Out-
puts
−
0.3 6 V
9&7,&
Fig. 1–2: Block diagram of the VCT 38xxA/B (shaded blocks are optional)
The block diagram does not show the additional features of VCT 38xxB.
Video
Front-end
Comb
Filter
Color
Decoder
Display
Processor Video
Back-end
Panorama
Scaler
43
4
12
31
2
I
2
C Master
3kB
OSD
96 kB
CPU ROM
TPU DMA CPU
24 IO Ports
Watchdog
2 CapCom
2 Timer
1 :1 Mux
10-bit ADC
8-bit PWM
Audio
3
2
Clock
Oscillator
1kB
CPU RAM
XTAL1
XTAL2
VIN
AIN
Pxy
ADB, DB, CB
RGBOUT
RGBIN
VERT
PROT
HFLB
SENSE
I
2
C
XREF
HOUT
VRD
VRT
SGND
Color, Prio
MSync
I
2
C
VSUPAB
VSUPP1
GNDP1
Reset
Logic
RESQ
VSUPS
TEST
GNDAB
VSUPAF
VSUPD
GNDAF
GNDD
RSW
2
GNDM
EW
8
14-bit PWM
2 2
3
CIN SVM
Video
GNDS
CLK20
RDY
BE
24 kB
VCT 38xxA/B
AOUT
VSync
VOUT
24 kB ROM
3kB
OSD RAM
Pict.Improv
16 kB
Te xt
RAM
-:+
9&7,&
Fig. 6–4: PMQFP128 package
48113
AIN2
114
AIN1
11
AOUT2
116
AOUT1
117
RESQ
118
SCL
119
SDA
120
XTAL1
121
XTAL2
122
VSUPS
123
GNDS
124
WE1Q
12
WE2Q
126
OE1Q
127
OE2Q
128
ADB18
CBIN
VSUPAF
47
GNDAF
46
SGND
4
VRT
44
VOUT
43
P10/VIN
42
P11
41
P12
40
P13
39
GNDP1
38
VSUPP1
37
P14
36
P1
3
P16
34
P17
33
VSUPADB
GNDADB
ADB16
ADB1
ADB14
ADB13
ADB12
ADB11
ADB10
ADB17
ADB9
ADB8
1 2 3 4 6 7 8 9 10 11 12 13 14 1 16 17 18 19 20 21 22 23 24
96 9 94 93 92 91 90 89 88 87 86 8 84 83 82 81 80 79 78 77 76 7 74 73
2 26 27 28 29 30 31 32
ADB7
ADB6
ADB
VSUPADB
ADB1
ADB0
DB0
DB1
DB2
DB3
VSUPDB
GNDDB
DB4
DB
DB6
DB7
ADB2
ADB3
ADB4
GNDADB
72 71 70 69 68 67 66 6
49 CIN1
0 CIN2/CRIN
1 VIN1
2 VIN2
3 VIN3
4 VIN4
DISINTROM
6 P27
7 P26
8 P2
9 P24
60 VSUPP2
61 GNDP2
62 P23
63 P22
64 P21
97
VERTQ
98
VERT
99
EW
100
SENSE
101
GNDM
102
RSW1
103
RSW2
104
SVMOUT
10
ROUT
106
GOUT
107
BOUT
108
VSUPAB
109
GNDAB
110
VRD
111
XREF
112
AIN3
SAFETY
VPROT
BIN
GIN
RIN
FBLIN
TEST
P30
P31
HFLB
P32
P33
GNDP3
VSUPP3
P34
P3
HOUT
CLK20
VB0
VB1
VB2
VB3
VB4
VB
VB6
VB7
VBCLK
P20
VSUPD
GNDD
P37
P36
VCT 38xxA/B
-:+
1 PIN FUNCTIONS
Pin
Number Name Function
1-V
CC Negative supply
2-V
CC Negative supply
3-V
CC Negative supply
4 OUT PWM Output
5 CFLY+ Flyback capacitor
6 CFLY- Flyback capacitor
7 BOOT Bootstrap capacitor
8 VREG Internal voltage regulator
9 FEEDCAP Feed-back integrating capacitor
10 FREQ Frequency setting resistor
11 SGND Signal Ground
12 IN- Error amplifier inverting input
13 IN+ Error amplifier non-inverting input
14 EA out Error amplifier output
15 +VCC Positive supply
16 +VCCPOW Positive Power supply
17 -VccPOW Negative Power supply
18 -VCC Negative supply
19 -VCC Negative supply
20 -VCC Negative supply
679,&
PIN CONNECTION
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
-VCC
-VCC
-VCC
-VCC
-VCC
-VCC -VCCPOW
+VCC POW
+VCC
EAout
IN+
IN-
SGND
OUT
CFLY +
CFLY -
BOOT
VREG
FEEDCAP
FREQ
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