Sharp 29A-SX1 User manual

1
29A-SX1
29A-SX5
29A-SX8
28 SYSTEM COLOURTELEVISION
WARNING
The chassis in this receiver is partially hot. Use an
isolation transformer between the line cord plug and
power receptacle, when servicing this chassis. To
prevent electric shock, do not remove cover. No user
– serviceablepartsinside.Referservicingtoqualified
service personnel.
SERVICE MANUAL
S79K429A-SX1X
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
Chassis No. SP-91
CONTENTS
Page
FEATURES ......................................................2
ELECTRICAL SPECIFICATIONS ................... 3
IMPOTANT SERVICE NOTES........................ 4
ADJUSTMENT PRECAUTION........................ 5
SERVICE ADJUSTMENT ............................... 9
TROUBLE SHOOTING TABLE..................... 21
SOLID STATE DEVICE BASE DIAGRAM .... 30
WAVEFORMS................................................31
CHASSIS LAYOUT ....................................... 32
BLOCK DIAGRAM ........................................ 34
DESCRIPTION OF SCHEMATIC
DIAGRAM ......................................................38
SCHEMATIC DIAGRAM ............................... 39
PRINTED WIRING BOARD ASSEMBLIES... 62
REPLACEMENT PARTS LIST...................... 71
29A-SX1
29A-SX5
29A-SX8
29A-SX1
29A-SX5
29A-SX8
28 SYSTEM COLOUR TELEVISION
SERVICE MANUAL MODELS 29A-SX1/SX5/SX8
SHARP CORPORATION

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
2
FEATURES
■World Multi 28 System. ■Component input Terminal(Rear). ■Twin Buss Reflex SP Box. ■Double Dynamic Picture Circuit. ■CATV Ready. ■PAL/NTSC Digital-Comb Filter. ■Sound Spatializer. ■Aperture Control Circuit. ■English/Chinese/Russian/French/Arabic/Malay 6 Language OSD. ■NICAM-I.B/G, IGR-B/G.
(Only for 29A-SX5/29A-SX8)
■Super Flat Picture Tube. ■CTI SRT Circuit. ■TEXT(English/German/French/Spanish/Italian/Swedish)
(Only for 29A-SX5)

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
3
ELECTRICAL SPECIFICATIONS
Power Input .............................................................................................. AC 110-240V, 50/60Hz (Auto) Power Consumption ...................................................................................................... 185W(29A-SX1)
195W(29A-SX5) 190W(29A-SX8)
Convergence.................................................................................................. Self Convergence System Focus ......................................................................................... Bi-Potential, Uni-Potential Electroslatic Sweep Deflection ......................................................................................................................Magnetic Intermediate Frequency Picture IF Carrier.................................................................................................................. 38.9 MHz Sound IF Carrier
6.5 MHz .............................................................................................................................. 32.4 MHz 6.0 MHz .............................................................................................................................. 32.9 MHz 5.5 MHz .............................................................................................................................. 33.4 MHz 4.5 MHz .............................................................................................................................. 34.4 MHz
Colour Sub-Carrier
PAL/NTSC ........................................................................................................................ 34.47 MHz SECAM................................................................................................................. 34.494/34.65 MHz NTSC................................................................................................................................ 35.32 MHz
Audio Power Output Rating............................................................................. 20W x 2 total 40W (Max) Speaker Size ........................................................................................8 x 12 cm x 2pcs, 10cm Round x 2pcs. Speaker Box Unit Impedance ................................................................................. 6.2 ohm at 400Hz Aerial Input Inpedance ............................................................................................ 75 ohm Unbalanced Receiving Channels
PAL-B/G, SECAM-B/G
VHF ...........................................................................................................................E2 thru E12 UHF .........................................................................................................................E21 thru E69 CATV ...........................................................................................................................X thru Z + 2,
S1 thru S41
PAL-D/K, SECAM-D/K
VHF ...........................................................................................................................R1 thru R12,
C1 thru C12
UHF ........................................................................................................................... 21 thru 69,
C21 thru C57
PAL-I, SECAM-I
VHF ............................................................................................... (IRELAND): B thru J UHF ................................................................................................(U.K.,H.K.): 21 thru 69
NTSC-M
VHF ..........................................................................................................(US): 2 thru 13
(JAPAN): 1 thru 12
UHF ..........................................................................................................(US): 14 thru 69
(JAPAN): 13 thru 62
CATV ........................................................................................................(US): A-6 thru A-1
A thru W+29
(JAPAN): C13 thru C63
Receiving Frequency
VHF ................................................................................ 44.25 MHz thru 463.25 MHz(29A-SX1)
45.25 MHz thru 463.25 MHz(29A-SX5/SX8)
UHF ...................................................................................................... 471.25 MHz thru 863.25 MHz Dimensions.................................................................................................................. Width : 800mm
Height : 579mm
Depth : 484mm
Weight (Approx) : 43.0kg
Specifications are subject to change without notice.

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
4
IMPOTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by qualified service peronnel only.
SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE When servicing the high voltage system, remove static charge from it by connecting a 10k ohm Resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead. (AC line cord should be disconnected from AC outlet.)
1. Picture tube in this receiver employs integral implosion protection. 2. Replace with tube of the same type number for continued safety. 3. Do not lift picture tube by the neck. 4. Handle the picture tube only when wearing shatterproof goggles and after dis-
charging the high voltage completely.
X-RAY This receiver is designed so that any X-Ray radiation is kept to an ab- solute minimum. Since certain malfunctions or servicing many pro- duce potentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed: 1. When repairing the circuit, be sure not to increase the high voltage to more than
33.0 kV (at beam 0
µ
A) for the set.
2. To keep the set in a normal operation, be sure to make it function on 29.5
±
1.5kV
(at beam 1.7 mA) in the case of the set.The set has been factory-Adjusted to the above mentioned high voltage.
If there is a possibility that the high voltage fluctuates as a result of repairs, never forget to check for such high voltage after the work.
3. Do not substitute a picture tube with unauthorized types and/or brands which may
cause excess X-Ray radiation.
BEFORE RETURNING THE RECEIVER
Before returning the receiver to the user, perform the following safety checks. 1. Inspect all lead dress to make certain that the leads are not pinched or that hardware
is not lodged between the chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metallic control knobs, insulating
fishpapers, cabinet backs, adjustment and compartment covers or shields, iso- lation resistor- capacity networks, mechanical insulators etc.

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
5
ADJUSTMENT PRECAUTION
The model is a mixture of the adjustment items of I
2
C BUS-CONTROL and the existing analog adjustment. Moreo-
ver, since the adjustment with I
2
C BUS-CONTROL is composed of the items which are set with the initial values
(preset values) alone and the data variable items, refer to the following.
1) Setting method to the microcomputer service mode
1When the TP1001/1002 are short-circuited, enter into the service mode (I
2
C BUS CONTROL adjustment
mode).
2The modes can be sequentially selected with the CH DOWN key of R/C.(or button of set behind door.) 3The modes can be sequentially selected in the reversed order of 2with the CH UP key of R/C. (or button of
set behind door.)
4The data can be converted with the VOLUME UP/DOWN key of R/C. (or button of set behind door.) 5When the short circuit between the TP1001/1002 is cut off, it will be released from the service mode.
2) Initial value (preset value) setting
1When the MAIN POWER switch set at the service mode side is turned on, the initial value will be automatically
set only on the new E
2
PROM (discriminated with the head 4 bytes).
2The initial data is set as shown in the attached sheets. 3Take care that there are the items which need be changed and the items in which the initial values continue
set. Instruct that it must set at the service mode side as shown in Item 2-1and the MAIN POWER switch must be turned on when the lamp is first turned on after the chassis is assembled. Take care that the beam current may excessively flow if the lamp is turned on unless E
2
PROM is initialized.
3) Since the E
2
PROM memory is submitted with the attached sheets for reference, use it.

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
6
SERVICE MODE
The service key selects the service mode. (Refer to the attached table.) Select the item with CH UP/DOWN key, and change the data with VOL UP/DOWN key. Moreover, in the service mode, the item can be directly selected by entering the following key.
Service item R/C-CODE Remarks
SERVICE MODE CUTOFF BKGD CUTOFF BKGD DVD V-AMP50 V-LINE50 V S-CORR50 V-CENT50 H-CENT50 H-SIZE50 E/W PAR E/W COR TRAPE SCM BELL SCM R-Y SCM B-Y SUB COL SUB COL DVD SUB TINT SUB TINT DVD SUB BRI SUB BRI DVD SUB CONT SUB CONT DVD SUB VOL V-AMP60 V-LINE60 V S-CORR60 V-CENT60 H-CENT60 H-SIZE60
CONT-UP CONT-UP COL-UP COL-DOWN BRI-UP BRI-DOWN TINT-UP TINT-DOWN CONT-DOWN SPA-DOWN BAL-UP SHARP-UP SHARP-DOWN TRE-UP SPA-UP SPA-UP BASS-DOWN BASS-DOWN BASS-UP BASS-UP TRE-DOWN TRE-DOWN BAL-DOWN COL-UP COL-DOWN BRI-UP BRI-DOWN TINT-UP TINT-DOWN
*1 *1 *1 *1 *1 *2 *2 *2 *2 *2 *2
*1 To receive DVD, switch the key input. *2 To receive the main 60Hz when inputting the key, switch it from 50Hz key.

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
7
Data at Address 00H thru 03H of E
2
PROM are read during shift to the service mode.
If any data is different from the following, E
2
PROM will be initializes as shown in the table.
00H : 23 01H : 77 02H : 42 03H : A5
• Adjusting item 1. Service mode 1
No.
0 Blank SERVICE MODE
28 Parabola adjustment 0~63 E/W PAR PDC E-W PARABORA 46 42
29 Corner adjustment 0~31 E/W COR PDC E-W CORNER 19 19
30 Trapezoid compensation 0~127 TRAPE PDC TRAPEZIUM 61 66
34 BELL filter adjustment 0~255 SCM BELL SECAM BELL FILTER 122 120
8 SECAM R-Y adjustment 0~15 R-Y SECAM R-Y 8 6
9 SECAM B-Y adjustment 0~15 B-Y SECAM B-Y 68
24 COLOUR sub adjustment 0~127 SUB COL V/C/D COLOUR 70 Center value to user COLOUR adjustment 60
25 COLOUR sub adjustment(DVD) 0~127 SUB COL DVD V/C/D COLOUR 67 Center value to user COLOUR adjustment the DVD mode 60
10 BRIGHTNESS sub adjustment 0~255 SUB BRI V/C/D BRIGHTNESS Center value to user BRIGHTNESS adjustment 12270
11 BRIGHTNESS sub adjustment (DVD) 0~255 SUB BRI DVD V/C/D BRIGHTNESS
Center value to user BRIGHTNESS adjustment the DVD mode 116 9
12 SUB CONTRAST sub adjustment 0~31 SUB CONT V/C/D SUB CONTRAST 20 17
13 SUB CONTRAST sub adjustment (DVD) 0~31 SUB CONT DVD V/C/D SUB CONTRAST 19 16
35 Sound volume adjustment 0~63 SUB VOL SPA VOLUME Max value to user VOLUME adjustment 4950
16 Vertical size adjustment (60Hz) 0~127 V-AMP60 PDC V-AMPLITUDE 110 97
17 Vertical linearity adjustment (60Hz) 0~31 V-LINE60 PDC V-LINEARITY 21 24
18 Vertical S type compensation adjustment (60Hz) 0~63 V S-CORR60 PDC V-S.CORRECTION 40 40
20 Horizontal position adjustment (60Hz) 0~31 H-CENT60 V/C/D H-PHASE 17 16
21 Horizontal size adjustment (60Hz) 0~63 H-SIZE60 PDC H-SIZE 1 27
27 Vertical position 0~3 V-SHIFT PDC V-SHIFT REG 2 2
31 Horizontal high voltage compensation 0~7 H-COM PDC H-COMPENSATION 4 4
26 Vertical high voltage compensation 0~7 V-COM PDC V-COMPENSATION 7 7
33 Vertical compensation 0~15 V-∫COR PDC V-∫CORRECTION 10 10
22 Colour decoder TINT adjustment (AUTO) 0~127 COL TINT AUTO V/C/D COLOUR DECODER 67 67
23 Colour decoder TINT adjustment (forcible) 0~127 COL TINT V/C/D COLOUR DECODER 56 58
32 Horizontal position 0~7 H-CENT PDC H-CENT 3 3
2 Vertical size adjustment (50Hz) 0~127 V-AMP50 PDC V-AMPLITUDE 110 97
1 Cutoff adjustment CUTOFF BKGD * * R30 G66 B0 G-D-62 B-D-72
3 Vertical linearity adjustment (50Hz) 0~31 V-LINE50 PDC V-LINEARITY 23 26
4 Vertical S type compensation adjustment (50Hz) 0~63 V S-CORR50 PDC V-S.CORRECTION 40 40
5 Vertical position adjustment (50Hz) 0~7 V-CENT50 V/C/D V-PHASE 4 5
6 Horizontal position adjustment (50Hz) 0~31 H-CENT50 V/C/D H-PHASE 13 14
7 Horizontal size adjustment (50Hz) 0~63 H-SIZE50 PDC H-SIZE 32 26
14 SUB-TINT adjustment 0~127 SUB TINT V/C/D TINT 59 Center value to user TINT adjustment
15 SUB-TINT adjustment(DVD) 0~127 SUB TINT DVD V/C/D TINT 54 Center value to user TINT adjustment the DVD mode 54
19 Vertical position adjustment (60Hz) 0~7 V-CENT60 V/C/D V-PHASE 1 2
Initial value Data range OSD display IC Data setting Initial value Remarks
[Remarks]
*1 When 50Hz data is set, the setting data is increased or decreased to set 60Hz data.
(However, 50Hz data does not vary when 60Hz data is set.)
*2 Because of the fixed data, it is unnecessary to set the data unless otherwise specified.
*3 It is impossible to set (use) the data “6” and “7”. Use “0” thru “5”.
Moreover, check whether “6” and “7” are used or not.
*4 When the data for the 1-screen mode is set, the set data is increased or decreased to set the data for the 2-
screen mode.

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
8
29A-SX SYSTEM INITIAL SETTING AT FACTORY
SKIP ON (POS 0), OFF (POS 1~99) Image system AUTO (All POS) NICAM forcible FM OFF (All POS) NICAM DS M1 (All POS) NICAM ST STEREO (All POS) NICAM MONO MONO (All POS) IGR forcible FM OFF (All POS) IGR ST STEREO (All POS) IGR DS MAIN (All POS) Last POWER ON TV/AV TV Last POS 1 FB POS 1 SAVE OFF AUTOSELECT ON BLUEBACK OFF DIGIT 2 DIGIT H/P VOL 0 BALANCE 0 (Center) VOLUME 0 OFF-TIMER Not set. ON-TIMER POS Not set. ON-TIMER VOL Not set. REMINDER Not set. Entertainment MOVIE
<AV menu : Entertainment>
Model name suffix
B
C(SINGAPORE)
G/F
G(AFRICA)
Z
J
Earth magnetism(nT)
V
20,000
–10,000
30,000
–10,000 –50,000
45,000
H
40,000 40,000 20,000 40,000 20,000 20,000
Background
12,300°K 12,300°K 12,300°K 12,300°K 12,300°K
7,500°K
X
0.272 0.272 0.272 0.272 0.272 0.300
Y
0.275 0.275 0.275 0.275 0.275 0.310
<Shipment setting key>
Voice system
D/K
I
B/G B/G
D/K
B/G
D/K
LANGUAGE
CHINESE CHINESE
ENGLISH
ARABIC
RUSSIAN
MALAY
FRENCH
INITIAL 1 INITIAL 2 INITIAL 3 INITIAL 4 INITIAL 5 INITIAL 6 INITIAL 7
<Factory setting and geomagnetic adjustment mode by model (reference)>
Mode
CONTRAST COLOUR BRIGHTNESS TINT SHARPNESS WHITE-TEMP YNR S-BOOST SPATIALIZER TREBLE BASS
STANDARD
60
0 0 0 0 0
OFF OFF OFF
0 0
MUSIC
60
0 0 0 0
+1 step to Blue
ON [I]
ON [III]
ON [I] : 0
0 0
MOVIE
60
0 0 0 0
+1 step to Red
ON [I]
ON [II]
ON [I] : 0
0 0
NEWS
60
0 0 0 0 0
ON [I] ON [I]
OFF
0 0

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
9
DIGITAL COMB FILTERY LEVEL ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1Digital comb filter
Y level adjust- ment R5406
1Input PAL colour bar signal (100% white colour
bar) of 1.0Vp-p at the 75Ωterminator from AV- IN terminal.
(Input level 1.0Vp-p ±0.05Vp-p)
2Connect the oscilloscope to TP5400. 3AdjustR5406 tomaketheY signal(100%white)
of TP5400 become 2.0 ±0.1Vp-p.
* Verify that all are linearly amplified.(100% white
area must not be collapsed.)
When it is adjusted at E-12ch, take care for the voltage value.
SERVICE ADJUSTMENT
PIF CHECK ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1RF-AGC
Cut-inadjustment (Already preset.)
1E-12CH (PAL Colour Bar) is received.
Electric field strength: 54±1dBµV (75ΩOpen)
2Connect the oscilloscope to TP210 as shown
below.
Note: If the impedance converter of
50/75 is not used at the electric field strength meter of 50Ωsys- tem, set 52 ±1dBV for 54 ± 1dBµV (75ΩOpen). Moreover, take care for the loss if the converter is used.
Fig. 3-1
3Lower the input electric field strength to 51 ±
1dBµV (75ΩOpen).
4Under the conditions 1and 3, TP210 volt-
age does not vary. Raise the input signal electric field strength to 60 ±1dBµV (75ΩOpen), and verify that it is 0.1V or more lower thanTP210 of 1and 3.
5Set the signal at 63 to 67dBµV, and verify that
any noise is not output.
6Set the signal at 90 to 95dBµV, and verify that
any black letter beat is not output.
VIDEO LEVEL ADJUSTMENT
1 VIDEO DET
Level adjustment R220
1E-12CH B/G-PAL colour bar (100% white bar)
is received.
2Adjust R220 to make the video output of the
AV-OUT terminal become1.0±0.05Vp-p at the 75Ωterminator.
NO. Adjustment part Adjusting procedure and conditions Waveform and others
* If there is not any problem when the
several lots of the model which em- ploys the relevant tuner is checked, apply the check of only 5and 6.
0.1V
Bias box
TP210
TV SETOscilloscope
Bias Box: About 4.5V

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29A-SX1
29A-SX5
29A-SX8
SX-68JF200
10
PAL CHROMA ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1-1 SUB-COLOUR
I
2
C bus adjust-
ment (RF signal)
1E-12CH(PAL colour bar) is received. 2Make the image normal with the remote con-
troller.
3Connect the oscilloscope to TP3802. (10:1
probe is used.) Range: 2V/Div. Sweep time : 20µsec/Div.
4Set the sub colour adjustment mode with the
remote controller, and vary the sub colour data to make 100%W of the colour bar and RED at the same level for adjustment shown in Fig.1- 1.
Fig. 1-1
Cy G
75%W Y 100%W Mg R
B
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1-1 SUB-TINT
I
2
C bus adjust-
ment (RF signal)
1Selectthesub-tint adjustmentmode(automatic
Y cut) to receive JA-8CH(NTSC colour bar).
2Connect the oscilloscope to TP800 (B-Y).
Range : 20mV/Div. (AC) Sweep time: 20µsec/Div. (10:1 probe is used.)
3Vary the sub tint data to adjust the waveform to
be gained as shown in Fig.1-1. TP800.............(KY) 6 pin
(B-Y)
W Y Cy G Mg R B
1-2 * SUB-TINT
I
2
C bus adjust-
ment (DVD signal)
1Selectthesub-tint adjustmentmode(automatic
Y cut) to receive the DVD colour bar signal.
2Connect the oscilloscope to TP800(B-Y).
Range : 20mV/Div. (AC) Sweep time:20µsec/Div. (10:1 probe is used.).
3Vary the sub tint data to adjust the waveform to
be gained as shown in Fig.1-1.
4Release the adjustment mode.
(B-Y)
W Y Cy G Mg R B
NTSC CHROMA ADJUSTMENT
1-2 * SUB-COLOUR
I
2
C bus adjust-
ment (DVD signal)
1DVD signal is received.(Half colour bar signal) 2Make the image normal with the remote con-
troller.
3Connect the oscilloscope to TP3802. (10:1
probe is used.) Range : 2V/Div. Sweep time: 20µsec/Div.
4Setthesub colouradjustmentmode (DVD) with
the remote controller, and vary the sub colour (DVD) data to make 100%W of the colour bar and RED at the same level for adjustment shown in Fig. 1-2. (* It is being examined.)
Fig. 1-2
Cy G
WY
100%W Mg R
B
Fig. 1-1 Fig. 1-1