SHARP C3704, C3704G, C3704H, C3704S Service manual & schematics

Page 1

SHARP SERVICE MANUAL

S88G9C3704H//

PAL SYSTEM COLOUR TELEVISION

моdels C-3704Н(ВК)/(W)

In the interests of user-safety (Required by safety regula-

The lastletter of the model name on the catalog, packing case, etc. indicates the colour of the product. (BK): Black (W): White

tions in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.


ELECTRICAL SPECIFICATIONS	1
IMPORTANT SERVICE NOTES	2
SERVICE ADJUSTMENT	3
TROUBLE SHOOTING TABLE	10
CHASSIS LAYOUT DIAGRAM	14
• PRINTED WIRING BOARD ASSEMBLIES	15
SCHEMATIC DIAGRAMS AND
WAVEFORMS	17
BLOCK DIAGRAM	21
REPLACEMENT PARTS LIST	23
PACKING OF THE SET	27

ELECTRICAL SPECIFICATIONS

Aerial Input Impedance 75 ohm unbalanced Convergence Self Converging System Focus Quadra-potential electrostatic Audio Power Output Rating 1.5 Watt (Max.) Intermediate Frequencies
Picture IF Carrier Frequency 39.5 MHz Sound IF Carrier Frequency 33.5 MHz Colour Sub-Carrier Frequency 35.07 MHz
Power Input 240 Volts AC 50 Hz Power Consumption 62 W Speaker Size, Voice Coil Impedance 8 cm (16 ohms at 400 Hz)
Sweep Deflection Magnetic Tuning Ranges UHF-Channels E21 thru E69
Specifications are subject to change without prior notice.

WARNING

Page

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 — serviceable parts inside. Refer servicing to qualified service personnel.

Page 2

IMPORTANT SERVICE NOTES

Maintenance and repair of this receiver should be done by qualified service personnel only.

SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE

When servicing the high voltage system, remove static charge from it by connecting a 10 k 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 discharging the high voltage completely.

X-RAY

This receiver is designed so that any X-Ray radiation is kept to an absolute minimum. Since certain malfunctions or servicing may produce 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 25.3 kV, (at beam 800 µA) for the set.
2. To keep the set in a normal operation, be sure to make it function on 22.0 kV ± 1.5 kV (at beam 800 µA) 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 the 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 leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver.
Inspect all protective devices such as non-metallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacity networks, mechanical insulators etc.

Page 3

SERVICE ADJUSTMENT PIF/AFT/SIF/AGC ADJUSTMENT

Tuner IFT coils:

* The tuner has been factory preset (no adjustment is needed).
1. Open the BU terminal of tuner.
2. Connect sweep generator's output to the test point of tuner, by using a 75Ω DC cut probe.

*Note:

The sweep generator's prove should be grounded closely to the tuner test point.

3. Output level of sweep generator: 80 dB
4. Connect response lead (low impedance probe with detector) to TP201.

5. PIF AGC:
Apply DC 4.5V to pin ② of IC201. 6. RF AGC:

Apply DC 4V to the tuner AGC terminal.

7. Adjust the tuner IF coils to obtain the waveform as shown figure below.

P-detector coil: T202

Connect sweep generator's output to TP205. Probe in use: 75Ω DC cut probe
- Sweep output level: 90dB
2. PIF AGC:

Apply 4.5V DC to pin (2) of IC201.

3. Have AFT muted.
AFT is muted if TP208 is grounded. 4. Connect response lead to the base of Q202. The response lead in use should be a direct probe with a resistor of 10 kohms included.

5. Adjust T202 so that 39.5 MHz signal is at maximum (± 50 kHz).

* Adjust PIF AGC voltage so that the output waveform is of approx. 1Vp-p.

Page 4

AFT coil: T201

1. Receive PAL colour bar signal.
Signal strength: Over 55dB, Below 80dB
2. Connect oscilloscope to the base of Q202.
Oscilloscope range: 0.5V/DIV
Sweep time: 20µsec/DIV
Synchronization: Horizontal sync
3. Connect the output of SSG (Standard Signal Generator) to the tuner IF output terminal across a capacitor of 1PF.
SSG output: 39.5 MHz ± 5 kHz (non modulated)
SSG output level: about 50 dB
* When the preset switch is at PST position, AFT is turned off.
* When the preset switch is set at NORMAL position, AFT is turned on.
4. Set the preset switch at PST position and adjust FINE button (Up or Down) of tuning control so that the output waveform suffers no beating.
5. Set the preset switch at NORMAL position.
6. Adjust T201 so that no beating is caused at the output waveform.

Finely adjust to make zero the beating

PIF overall waveform

1. Open the BU terminal of tuner.
2. Connect sweep generator's output to the test point of tuner.
Probe in use: 75Ω DC cut probe
Sweep output level: 70 dB
Connect response lead to the base of Q202. The response lead in use should be a direct probe with a resistor of 10 kohms included.
4. RF AGC: Apply about 4V DC to the tuner AGC terminal.
5. PIF AGC: Apply about 4.5V DC to pin ② of IC201.
6. Connect a 120 ohm damping resistor in parallel to R217 (in IF pack).
7. Turn off AFT. ATF is turned off if TP208 is grounded.
8. Adjust IF AGC voltage so that the output waveform is of about 1Vp-p.
9. Check that the overall waveform is as shown in Figure below.

RF AGC cut-in control: R208

1. Receive colour bar signal.
Signal strength: $55dB \pm 1dB$ (with $75\Omega$ terminated)
2. Connect DC voltmeter to the tuner AGC terminal. (Full scale: 10V)
3. Turn R208 so that the voltmeter reads the maximum output.
4. Slowly turn R208 in the opposite direction until the voltmeter begins to decrease its reading; then stop turning of R208.
5. Set the singal strength at 65dB±2dB, and check that no noise appears.
6. Receive Phillips pattern signal, and check that no noise appears.
Signal strength: 65dB±2dB
7. Set the signal strength at 90dB to 95 dB and check that there appears no crossmodulation beating.

Page 5

Sound-detector coil: T301

* This coil has been factory preset (no adjustment is basically needed).
1. Connect SSG output to pin 18 of IC201.
The probe in used should be a 75Ω DC cut probe.
SSG output level: 80dB
2. IF AGC:
Apply 4.5V DC to pin ② of IC201.
3. Connect DC voltmeter to pin (1) of IC201. (Full scale: 10V)

VIDEO/CHROMA ADJUSTMENT

CRT cut-off adjustment

R853: R-bias control
R859: G-bias control
R865: B-bias control
Screen control
R857: G-drive control
R863: B-drive control
*Note:

Prior to this adjustment, warm up the unit with the beam current of more than 450µA for more than 30 minutes.

1. Receive monoscope pattern signal.
Set R857 at CENTER position. Set R863 at CENTER position. Set R853 at MIN position. Set R859 at MIN position. Set R865 at MIN position.
3. Set the screen control at MIN position.
4. Short TP403 and TP404.
5. Short TP401 and TP402.
6. Slowly turn the screen control clockwise until the horizontal raster appears slightly, and stop it.
7. Here, one of the three colours (red, blue, green) appears first as the screen control is turned. So, touching off the bias control belonging to the first colour, use and move the other two controls so that the horizontal raster becomes white.
8. Turn the screen control counterclockwise until the horizontal raster disappears, and stop it.

White balance and back ground

value as in step 4 above.

Remove the grounding at TP301.

R857: G-drive control

4. Audio-MUTE ON

5. Audio-MUTE OFF

4.5V.

R863: B-drive control
R407: Sub-contrast control

*Note:

Prior to this adjustment, warm up the unit with beam current of more than 450µA, for more than 30 minutes.

Have TP301 grounded, and read the value when avail-

able on the voltmeter (VTVM). It should be about

6. Adjust T301 so that the voltmeter indicates the same

1. Receive monoscope pattern signal.
2. Set the contrast control and brightness control at MAX position.
3. Connect beam ammeter to TP601 and TP602. (Full scale: 1mA)
4. Adjust R407 so that the beam current becomes 0.8mA (rough adjustment).
5. Adjust R857 and R863 so that the colour temperature is at 7500°K. (High beam: 0.8mA)
6. Adjust the contrast control and brightness control so that the beam current is approx. 200μA, and check that the colour temperature is at 7500°K. If the temperature is not at 7500°K, go back to "CRT cut-off adjustment" and repeat the adjustment.

Sub-contrast control: R407

*Note:

Prior to this adjustment, warm up the unit with beam current of more than 450µA, for more than 30 minutes.

1. Receive monoscope pattern signal.
2. Set the contrast control and brightness control at MAX position.
3. Connect beam ammeter to TP601 and TP602. (Full scale: 1mA)
4. Adjust R407 so that the beam current becomes 0.8mA.

Page 6

PAL chroma adjustment

R812: 1H-delay amp control T802: 1H-delay phase control T801: CW phase control

1. Receive PAL colour bar signal.
* Before this adjustment, the PIF/AFT/AGC adjustment must have been completed.
Connect the following resistance matrix to pins 3 and 4 of the connector (K), to which an oscilloscope is connected.

3. Set the contrast control and brightness control at MAX position.
4. Adjust the colour control so that the output waveform of colour difference signal becomes 2.5Vp-p.
5. Adjust R812, T802 and T801 so that the output waveform shown in Fig. a is corrected to that shown in Fig. b.

Page 7

ADJUSTMENT OF DEFLECTION LOOP

Horizontal size control: S601

1. Receive monoscope pattern signal.
2. Set the brightness control and contrast control at MAX position.
Adjust S601 so that the horizontal size of picture is at the best point

Horizontal size: 8% TYP (Max. 10%)

Horizontal centering control: R617

* This adjustment should be performed after the purity convergence adjustment.
1. Receive monoscope pattern signal.
2. Adjust R617 so that the horizontal center of picture is at the position which gives the relation of A=B shown below.

Vertical size control: R509

1. Receive monoscope pattern signal.
2. Set the brightness control and contrast control at MAX position.
Adjust R509 so that the vertical size of picture is at the best point.

Vertical size: 8% TYP (Max. 10%)

Vertical linearity control: R507

1. Receive monoscope pattern signal.
2. Adjust R507 so that the vertical linearity of picture is at the best point.

FOCUS ADJUSTMENT

Focus adjustment

1. Receive monoscope pattern signal.
2. Set contrast control at NORMAL position.
Set brightness control at MAX position (with 0.8mA of beam current). (Instead of monoscope pattern signal, it is allowed to

use white pattern signal of 88% modulation.)

4. Adjust focus control to have the best focus at the central area of CRT.

Page 8

PURITY ADJUSTMENT

Purity adjustment

1. Prior to the purity adjustment, warm up the unit with beam current of more than 450µA, for more than 30 minutes.
2. Receive the green signal alone and adjust the beam current to about 600µA.
3. Fully degauss the CRT with the degaussing coil.
4. Before the purity adjustment, it is needed to roughly adjust the static convergence.
5. Set the purity magnet at the position which gives zero (0) magnetic field.

Adjustment:

* During the adjustment, keep the unit facing the east.
6. Observe the green spots ("a" and "b") with a microscope as shown in Fig. A, and adjust the purity magnet so that they are at the specified landing position.

Figure A

If the right and left green spots are both deviated outwards from their landing positions as shown in Fig. B push the deflection yoke forwards until their positions are corrected.

8. If the beam landing is shifted to right or to left as shown in Figs. C and D, adjust the opening degree of the purity magnet so that the beam landing is correctly positioned.

9. Adjust the purity magnet so that the beam landing is correct at either of the central part, right and left parts of screen, then check that the green beams at four corners of screen are all correctly positioned. Finally, check that the beam landing at any part of screen is satisfactory with the Rank "B" specifications.
10. If the green beam is positioned to mix with the other colour, pull the deflection yoke backward.
Outside of the specified landing: To front of the deflection yoke
Inside of the specified landing: To back of the deflection yoke
11. Set the raster rotation at "0" position (with the unit facing the east.)
12. Tighten the screws of the deflection coil. Tightening torque: 11kg±2kg

Page 9

CONVERGENCE ADJUSTMENT

Convergence adjustment

This adjustment should be performed after the purity magnet adjustment.

1. Receive crosshatch pattern signal.
2. Set the brightness control and contrast control at MAX position.

Static Convergence
3. Adjust the opening degree of the 4-pole magnet and rotate the magnet to converge red and blue lines.
4. Adjust the opening degree of the 6-pole magnet and rotate the magnet to converge red, blue and green lines.
Dynamic convergence
5. Dynamic convergence (convergence of the three colour fields) at the edges of CRT screen is accomplished in the following manner.
Convergence in Fig. a:

Insert wedge (a) between the deflection yoke and CRT, and tilt the deflection yoke upward until the mis-convergence shown in Fig. a is corrected.

Convergence in Fig. b:
- Insert wedges (b) and (c) between the deflection yoke and CRT, and tilt the deflection voke until the misconvergence shown in Fig. b is corrected.

• Convergence in Fig. c: Insert wedge (c) deeply between the deflection yoke and CRT, and tilt the deflection yoke to right until the mis-convergence shown in Fig. c is corrected.

Figure o

• Convergence in Fig. d:

Insert wedge (b) deeply between the deflection yoke and CRT, and tilt the deflection yoke to left until the mis-convergence shown in Fig. d is corrected.

6. Stick the three wedges onto the CRT, and apply glass tapes thereon.
7. Apply lacquer to the deflection yoke screw, magnet unit (made of purity, 4-pole and 6-pole magnets) and magnet unit screw

After the adjustment, receive either the Red or the Blue signal and check that there is no mixture with the other colour signal

Page 10

TROUBLESHOOTING TABLE

Page 11

Page 12

Circuit to be SIF Ampli Sound DE Audio out

Page 13

Page 14

CHASSIS LAYOUT

Page 15

Page 16

Page 17

DESCRIPTION OF SCHEMATIC DIAGRAM

SAFETY NOTE:

1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACEING PARTS.
SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING.

IMPORTANT SAFETY NOTICE:

PARTS MARKED WITH "A" ( ) ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAIN-TAINING THE SAFETY AND PERFORMANCE OF THE SET.

SOLID STATE DEVICE BASE DIAGRAM

NOTE:

1. The unit of resistance "ohm" is omitted (k-1000 ohms M-1 Megohm).
2. All resistors are 1/8 watt, unless otherwise noted.
All capacitors μF, unless otherwise noted p-μμF.
Voltage Measurement Conditions
1. Voltages in parenthesis measured with no Signal
Voltages without parenthesis measured with 3000 μV B & W or Colour-Signal.
3. All the voltages in each point are measured with Vacuum Tube Volt Meter.
Waveform Measurement Conditions
Colour bar generator signal of 2.3 V peak to peak applied at Base of Video Buffer Amp Q202.
2. Approximately 4.0 V AGC bias.

Page 18

WAVEFORMS

SERVICE PRECAUTION:

The area enclosed by this line (-----) is directly connected with AC Mains Voltage. When servicing the area, connect an isolating transformer between TV receiver and AC line to eliminate hazard of electric shock.

CAUTION.

This circuit diagram is original one. Therefore there may be slight differences from yours.

Page 19

Page 20

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Page 23

Ref. No.	Part No.	*	Description	Code	Ref. No.	Part No.	*	Description	Code
▲C719,	RC- KZ0023CEZZ	J	4700P 2kV Ceramic	AD		COIL
C726 C731 C734	RC-KZ0057CEZZ VCÉAAH2CW107M VCEAGA1EW477M	L L L	1500P 2kV Ceramic 100 160V Electrolytic 470 25V Electrolytic	AD AE AD	L851	VP - CF 681K0000	J	680µH	АВ
C738	RC- KZ0036CEZZ	J	330P 2kV Ceramic	AB		CON	TRC	DLS	•••••
	RESI	ST	ORS		- R853, 859,	RVR-B4567CEZZ	Ĵ	5K(B) Red Bias Green Bias	AC
R311, 731 R515	RR-XZ0027CEZZ	J	2.2 1/2W Fuse Resistor	AB	865 R857, 863	RVR-B4562CEZZ	J	Blue Bias 300(B) Green Drive Blue Drive	AC
620			22 1/4W Fuse Resistor	AB
R611	VRW- KV3HC100K	J	10 5W Cement	AB AC		САРАС	CIT	ORS
R612 R618 R621 R701 R702 B704	VRS-PU2HB102J VRN-RV3AB1R5J VRW-KV3HC6R8K VRS-PV3LB124J BB-Y700116573	J J J	270 1/2W Fuse Resistor 1K 1/2W Metal Oxide 1.5 1W Metal Film 6.8 5W Cement 120K 3W Metal Oxide	AB AA AA AC AC	C854 C855 C856	RC- KZ015JCEZZ VCEAAA2DW106M RC- KZ0027CEZZ	1 1 1	0.01 1.5kV Ceramic 10 200V Electrolytic 100P 12kV Ceramic	AB AC AD
R709 R710	VRS-VV3AB272J VRG-RL2HB181J	J	2.7K 1W Metal Oxide		·	RESIS	то	RS
▲R719, ▲ 720 R905 B1026	VRC- UA2HG825K VRS- PU2HB223J	J	8.2M 1/2W Netal Oxide		R855, 861, 867	VRC-MA2HG272K	J	2.7K 1/2W Solid	АА
			12K 2W Wetal Oxide	АА	R860, 866,	VRS-VV3DB153J	J	15K 2W Metal Oxide	АА
	SWIT	CH	IES		868
∆S701 S1001	QSW-P0418CEZZ QSW-K0014CEZZ	J	Main Power SW Up/Down Controls	AK AC		MISCELLAN	EO	US PART
1008					∆ S853	QSōCV0829CEZZ	J	CRT Socket	AK
	MISCELLAN	EOI	JS PARTS
▲F701	QFS-C2024CEZZ QFSHD1002CEZZ	J	Fuse T2A Fuse Holder	AD AA		MISCELLANE	οι	JS PARTS
FB602 FB702, 703, 731	RBLN-0010CEZZ RBLN-0037CEZZ	J. J	Ferrite Bead Ferrite Bead	AC AB	∆ SP1	QACCB9011CEZZ QANTL0037CEZZ VSP0080P-C6WS	J J	AC Cord Loop Antenna Speaker	AN AH AN

PWB-B	DUNTK5740WEV2	IST
Q851, 852, 853	VS2SC2229ō/-1	J	2SC2229(ō)	AE

Page 24

Ref. No.	Part No.	*	Description	Code	Ref. No.	Part No.	*		Descr	iption	Code
	PACKAG	D	CIRCUITS		R417	RVR-Z4086CEZZ	J	10K(I	B) Brigh	tness/Colour/	АН
X801	RCRSB0084CEZZ	J	Crystal-4.43 MHz	АН					Conti Swite	rast/Preset ch
PORTOT	RMPTP0028CEZZ	J	Positive Coefficient Thermistor	AG	R507, 617	RVR-B0007PEZZ	R	10K (I	B) Verti Horiz	cal Linearity	AD
					R509	RVR-B0002PEZZ	R	200K	(B) Ver	tical Size	AD
	С	OIL	s
L201,	VP - DF 1 20K0000	J	12µH	АВ		САРА	CI	TORS
202, 207, 209,					C205, 305, 604	VCEAGA1CW337M	J	330	16V	Electrolytic	AC
1002			10.11		C207 C208,	RC-KZ0056CEZZ VCE9AA1HW105M	J	0.1 1	16V 50V	Ceramic Electrolytic	AB AB
L203 L301, 303	VP- CF 3R3K0000	J	12µн 3.3µН	AB AB	534 C216, 505, 617	RC- QZA104TAYK	J	0.1		(NP) Mylar	АВ
306, 501, 731,	•			-	1010, 1011 C313,	VCEAGA1VW477M	J	470	35V	Electrolytic	АП
732 L601	RCi LZ0004PEZZ	В	Linearity Coil	ΔΝ	510
L602	RCi LP0088CEZZ	J		AG	C315 C317,	RC-QZA563TAYK VCKYPA2HB102K	J	0.056 1000F	3 2 500V	Mylar Ceramic	AB AA
L603	VP - CF 100K0000	J	10μH	AB	511,		Ũ		0001	Cerame
L702		J	1μH Line Filter		609,
L705,	VP - DF 8R 2K0000	J	8.2µH	AB	619, 718
803					733
L706	VP - CF 331K0000	J	330µH	AB	C318	VCEAGA1EW337M	J	330	25V	Electrolytic	AC
L1003	VP- DF680K0000	J	68µH	AB	C501	VCSATA1VE225K	J	2.2	35V	Tantalum	AC
					C502	VCEAGA1EW227M	J	220	25V	Electrolytic	AC
	CERAMI	CF	ILTERS	-	C509,	VCSATA1VE475K	J	4.7	35V	Tantalum	AD AD
CF202	RFilC0023CEZZ	J	6.0 MHz Trap	AE	C608	VCEAAA2CW105M	J	1	160V	Electrolytic	АВ
CF301	RFiLC0084CEZZ	J	6.0 MHz Filter	AF	C610	VCFPPD3CA562H	J	5600P	1.6kV	Metalized	AE
CF601 SE201	RFILA0020CEZZ	J	SAM Filtor	AD	0010	VOKYDUODDEOAK				Polyester
51 201	MT12000720222		SAW Fliter	AL	721	VCKYPH3DB561K	J	560P	2kV	Ceramic	AC
	DELAY		NES	.	C613	VCFPPD2DB334J	J	0.33	200V	Metalized Polyester	AF
DL401	RCi LZ0432CEZZ	J		AG	C614	VCQPSC2DA104K	J	0.1	200V	Polypro Film	AC
DL801	RCi LZ0475CEZZ	J	Delay Line (1H)	AP	C615	VCQPSD2DA224J	J	0.22	200V	Polypro Film	AD
					C620	VCEAAA2DW106M	J	10	200V	Electrolytic	AC
	TRANSF	OR	MERS		C621		J	330 220P	6.3V	Electrolytic
T201	BCilD0151CEZZ	1	AET-Coil		C631,	VCEAGA1CW107M	J	100	16V	Electrolytic	AB
T202	RCi LD0130CEZZ	J	P-DET-Coil	AD	801					,
T207	RCi Li 0431CEZZ	J	SAW-Matching	AD	∆C701	RC-FZ0066CEZZ	J	0.1	AC250	√ Metalized	AE
T301	RCiLD0152CEZZ	J	S-DET-Coil	AE	C702	BC- K70029CE77		0.01	AC 2501	Polyester	AC
AT602	RTRNZU1/9CEZZ	J	Horizontal Drive Trans.	AE	703,		"	0.01	A0230	Vecturine
∆T701	RTRNZ0014PEZZ	R	Regulator Trans.	AX	705,
т801	RCiLV0122CEZZ	J	CW Phase	AD	706,
т802	RCi LZ0439CEZZ	J	Maching Trans.	AD	708, 717
					C707	RC- EZ0055CE77	J	150	400V	Electrolytic	AN
	CONT	RO	LS	l	C710	VCQPSC2JA333K	J	0.033	630V	Polypro	АВ
B209	BVR BOOGEDEZZ				C711	VCEAGA2AW105M	L	1	100V	Electrolytic	АВ
812	n vn- DUUUSPEZZ	n			C712	VCKYPA2HB222K	٦	2200P	500V	Ceramic	AA
R407	RVR-B0008PEZZ	R	20K(B) Sub-Contrast	AD	C714, 716	VCEAAA2AN106M	J	10	100V	Electrolytic	AC

Page 25

	PART	TS L	IST		Ref.	No.	Part No.		*	Description		Code
	PARTS R	EPLACE	MENT		0.20	2,	VS2SC945AF	- / -	1 J	2SC945	+	AB
					60	12, 18.
Benja	00mont nexts				61	0,
identi	fied in this manuals alout	these spe	cial safety charac	cteristic	cs 10	01
tures	are identified by A in th	e Bonloog	onents having s	such fea	a- Q40	2,	VS2SA1015Y	/ 1 E	J	2SA1015(Y)		• •
The u	se of a substitute replace	ment part	which does not l	hava +h	60	3,						AC
same	safety characteristics as	the factor	v recommended	renlace		7, 04
ment	parts shown in this servic	ce manual	may create shoc	k, fire c	or 100	25
other	nazards.				Q601	1	VS2SC2271-			250 2271
			MENT DADE	•	Q602	2 \|	VS2SD1554/	/ 1E	J	2502271 2SD1554	1	AD
			WENT PARTS	57	0606	5	VS2SC2236Y	/ - 1	J	2SC2236(Y)		4L 4 D
To hav	e your order filled promp	tly and cor	rectly, please fur	nich th	0100	2	VS2SC383-W	Γ-1	J	2SC383		ΑE
follow	ing informations.		i seal // piedac ful	11311 (11								-
	1. MODEL NUMBER	2. REF	NO			k .		DIC
	3. PART NO.	4. DES	CRIPTION						DES
					D209	, \|	VHD1SS119//	1 E		155119
	* MARK: SPARE PAR		FRV SECTION		- 210,	. \|				100110	A	A
					211,	. \|
Ref. No.	Part No.	*	Description	0	10 304,							- [
					401,
	PICTU	RE TUBE			405,
					602,
7	VB34JRH61X/*S	J CRT		CF	606,
	RCILG0023PEZZ	R Defle	ction Yoke	BF	611,
	PMAGF 3006CF77	R Dega	Issing Coil	AN	619
	PSPAG0031CEZZ	J Weda	Wagnet	AK	619
		- mag	e (S Useu)	AC	620,
					624,
					628,
	PRINTED WIRING B	OARD A	SSEMBLIES		629,
		EMENT	ITEM)		1001,
>WR-∆	DUNTKEZOOWEVA
WB-B	DUNTK5700WEV4	- Mothe	r Unit	-	1007,
		- CRIS	ocket Unit	-	1011,
					1023
					D214	R	H-EX0341GEZ	z \| .	JZ	ener Diode, 3.0V
WB-A	DUNTK5700WEV4	МО			D302	RI	H- DX0224CEZ	Z .			AB
					608.		DX02/9CEZ	Z J J			AB
	TUN	ER			701
N	OTE: THE PARTS HERE S
	AN ASSEMBLY BUT	NOT IND			704,
		T		.	D502	R
	VTUi TSA7B////	J UHF Tu	ner	BE	733		I DAUTZ/CEZ.		15	5295G	AC
					D603	RH	- DX0073CEZ
	INTEGRATED	CIRCUIT			D607	RH	- EX0182GEZ2	z J	Zei	ner Diode, 22V
					D617	RH	- EX0019TAZZ	z \| J	Zer	ner Diode, 12.3V	AB
201	RH- i X0711CEN1 J			AN	707	\| кн	- DX0123CEZZ	: \| J	TV	R1D	AC
301	RH- i X0250CEZZ J			AK	D708	RH	- DX01310=75	. \| .
701	RH- I X0238CEZZ J			AK	D709,	RH	- DX0226CF77				AC
801	RH- 1 X07120EN11			АК	732						AC
1001	RH- i X1082CE77 \| 1			AV	D710	RH	DX0164CEZZ	J	ES-	1F	AC
1002	RH- i X0037CEZZ .I			AT	D731	RH	EX0152CEZZ	J	Zen	er Diode	AE
				AF	D1002	RH-	EX0020GEZZ	J	Zen	er Diode, 5.1V	AE	ĺ
					1003,	кH-	EXU030GEZZ	J	Zen	er Diode, 4.3V	AB
	TRANSIST	TORS			D1009	RH-	PX0173CF77		LED
201	VS2SC1906//1E	250100									АМ
	J	2001906		AC \|	1

Page 26

Ref. No.	Part No.	*	Description	Code	Ref. No.	Part No.	*	Description	Code
	CABINE	T F	PARTS		1-4	JBTN-0046PESA	R	Button—Channel/Volume Window Cover	AE AG
1	CCABA2059WEW6	R	Front Cabinet Ass'y (C-3704H(BK))	вк	1-5	GMADT0018PESB	R	(C-3704H(BK)) Window Cover	AL
1	CCABA2059WEW8	R	Front Cabinet Ass'y (C-3704H(W))	ВМ	1-6	Hi NDM0147PESA	R	(C-3704H(W)) Indication Plate	AF
1-1 1-2	Not Abailable GDō RF 0079PESA	R R	Front Cabinet Door (C-3704H(BK))	AL	1-6	Hi NDM0147PESB	R	Indication Plate (C-3704H(W))	AF
1-2 1-3	JBTN- 0045PESA	R	Button – Power	AF	1-7 1-8	MSPRC0004PEFW PKAi - 0001PE00	R R	Spring Push Latch	AA AD
1-3	JBTN-0045PESB	R	Button—Power (C-3704H(W))	AG	2	GCABB2046PEKA	R	Back Cabinet	BG
	1-2							(1-7)

Page 27

PACKING OF THE SET

• Setting positions of the knobs

Page 28

SHARP

T6552-S Printed in UK MW.KY

/ =

Page 29

SHARP SERVICE MANUAL SERVICE-ANLEITUNG

$51C4CV3720SG

SUPPLEMENT

PAL SYSTEM COLOUR TELEVISION FARBFERNSEHGERÄT

Chassis No. 14A Chassis Nr. 14A

SECAM/PAL SYSTEM COLOUR TELEVISION FARBFERNSEHGERÄT

Chassis No. 14A Chassis Nr. 14A

MODELS/MODELLE

MODEL/MODELL

CV-3720S, S (W)

CV-3720G

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

Im interesse der Benutzer-Sicherheit (in einigen Länder durch Sicherheitzvorschriften gefordert) sollte dieses Gerät wieder suf seinen ursprünglichen Zustand eingestellt und nur die vorgeschriebenen Teile verwendet werden.

The Supplement has been made up to describe the details of the PWB-A on models CV-3720S, CV-3720S(W) and CV-3720G.

Diese Ergänzungsanleitung wurde erstellt, um die Details der PWB-A für die folgenden Modelle zu beschreiben: CV-3720S, CV-3720S(W) sowie CV-3720G.

Page 30

her Unit / Hauptplatine

CV-3720S, CV-3720G CV-3720S (w)

SUPPLEMENT


					4.2
-	•		10	11	17
/	N N	9	1 10	11
/	v	-

Page 31

PRINTED WIRING BOARD ASSEMBLIES

(All the PWBs here are shown as viewed from their wiring sides.)

LEITERPLATTENEINHEITEN

(Alle hier gezeigten Platten sind von der Leiterbahnseite aus gesehen.)

Page 32

CV-37205, CV-3720G CV-37205 (w)

SUPPLEMENT

SHARP C3704, C3704G, C3704H, C3704S Service manual & schematics

SHARP SERVICE MANUAL

PAL SYSTEM COLOUR TELEVISION

моdels C-3704Н(ВК)/(W)

CONTENTS

ELECTRICAL SPECIFICATIONS

WARNING

IMPORTANT SERVICE NOTES

X-RAY

BEFORE RETURNING THE RECEIVER

SERVICE ADJUSTMENT PIF/AFT/SIF/AGC ADJUSTMENT

Tuner IFT coils:

P-detector coil: T202

AFT coil: T201

Finely adjust to make zero the beating

PIF overall waveform

RF AGC cut-in control: R208

Sound-detector coil: T301

VIDEO/CHROMA ADJUSTMENT

CRT cut-off adjustment

White balance and back ground

Sub-contrast control: R407

*Note:

PAL chroma adjustment

ADJUSTMENT OF DEFLECTION LOOP

Horizontal size control: S601

Horizontal centering control: R617

Vertical size control: R509

Vertical linearity control: R507

FOCUS ADJUSTMENT

Focus adjustment

PURITY ADJUSTMENT

Purity adjustment

Adjustment:

CONVERGENCE ADJUSTMENT

Convergence adjustment

TROUBLESHOOTING TABLE

DESCRIPTION OF SCHEMATIC DIAGRAM

SAFETY NOTE:

IMPORTANT SAFETY NOTICE:

SOLID STATE DEVICE BASE DIAGRAM

WAVEFORMS

SERVICE PRECAUTION:

PACKING OF THE SET

• Setting positions of the knobs

SHARP

SHARP SERVICE MANUAL SERVICE-ANLEITUNG

SUPPLEMENT

MODELS/MODELLE

CV-3720G

her Unit / Hauptplatine

PRINTED WIRING BOARD ASSEMBLIES

LEITERPLATTENEINHEITEN

SHARP