SHARP Service manual / Схема, сервісна інструкція Service manual & schematics

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SHARP SERVICE MANUAL

PAL SYSTEM COLOUR TELEVISION

MODEL C-3705

In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified should be used.

- ELECTRICAL SPECIFICATIONS

	гауе
ELECTRICAL SPECIFICATIONS	1
IMPORTANT SERVICE NOTES	2
CIRCUIT DESCRIPTION	3-20
SERVICE ADJUSTMENTS	21-24
TROUBLE SHOOTING TABLE	25-29
REPLACEMENT PARTS LIST	30-33
SOLID STATE BASE DIAGRAM
TUNER SCHEMATIC DIAGRAM	34
REMOTE CONTROL TRANSMITTER AND
PIF/SIF SCHEMATIC DIAGRAM	35
PRINTED WIRING BOARD ASSEMBLIES
BLOCK DIAGRAM	INSIDE
SCHEMATIC DIAGRAMS AND WAVEFORMS	REAR
CHASSIS LAYOUT DIAGRAMS	COVER
,

CONTENTS

Aerial Input Impedance 75 ohm unbalanced
Convergence Self Converging System
Focus Bi-potential electrostatic
Audio Power Output Rating 1.5 W (max.)
Intermediate Frequencies
Picture IF Carrier Frequency 38.9 MHz
Sound IF Carrier Frequency 33.4 MHz
Colour Sub-Carrier Frequency 34.47 MHz
Power Input 230V AC 50Hz
·
Power Consumption 57 W
Speaker Size
Voice Coil Impedance 16 ohms (at 400 Hz)
Sweep Deflection Magnetic
Tuning Ranges VHF-Channels 1 thru 11
UHF-Channels 21 thru 69

WARNING

The power supply section of this receiver is connected directly to the AC mains supply. When servicing this receiver connect the mains supply via an isolating transformer.

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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 tag and 2nd anode lead. (AC line cord should be disconnected from AC outlet.)

1. Picture tube in this receiver employs integral implosion protection.
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 25.2kV, (at zero beam current).
2. To keep the set in a normal operation, be sure to make it function at 20.5 kV ± 1.5 kV (at beam 800 µA). 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.

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TUNER, PIF, P-DETECTOR, SIF, S-DETECTOR AND AUDIO OUTPUT CIRCUIT

1. TUNER

Fig. 1-1 is a block diagram of the tuner and the arrow marks in it show the signal transfer in the tuner. The UHF/VHF signal from the antenna is first filtered and is fed into the RF amplifier. The VHF signal from the low-pass filter is sent to the VHF RF amplifier, and the UHF signal from the high-pass filter enters the UHF RF amplifier. The selected channel signal is amplified with the band switch (V₁, V₁₁₁ and U) and V_T (tuning voltage) supply, then is delivered to the mixer. It is in the mixer that UHF or VHF signal is made together with the signal coming from the local oscillator that oscillates at the specified frequency across the V_T which results in IF signal.

The IF signal is further sent to the IF amplifier and appears at the IF output terminal of the tuner. AFT terminal is provided and it controls the local oscillation frequencies to prevent the tuner's IF signal from being detuned.

See Fig. 1-2 and 1-3 for the voltage characteristics of each terminal.

The features of this tuner are:

Very compact (as small as 33 cc in volume)
Chip parts included
AFT provided
Transistor mixer is used as UHF mixer: Compared with the conventional diode mixer, it offers the better tuning selectivity.

Figure 1-1. Block diagram of the tuner

Tuner Terminal Band	Β	В _н	Β _υ	+ B
VI	12V	0V	0V	12V
VIII	9V	12V	0V	12V
U (21~69 channel)	0V	0V	12V	12V

Figure 1-3

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2. PIF, P-detector function (RUNTK0095CEN1)

The IF signal from the tuner is amplified by the buffer amplifier (Q202), fed through the saw filter of CF201 to get a specific IF selectivity, and finally inputted into pins (a) and (a) of IC201. The inputted IF signal is then amplified by the IF amplifiers (1st-3rd amplifiers) and fed through the AGC circuit. This signal is synchronous-detected in the next stage (VIDEO DET) and the detected video signal is outputted from pin (a) according to the white/black-spot inverters. It should be noted that in the system the signal contains the audio carrier signal (5.5 MHz). So it should be attenuated with the traps of CF202, fed through the 1st video amplifier (Q203) and the video polarity reversing IC801, and supplied to the chroma and video circuits.

In Fig. 2 are shown the P-detector waveforms

Figure 2. Waveforms on P-Detector Circuit

4. AGC (Automatic Gain Control)

Within the IC201, the video signal coming from the video detector circuit is applied to the white-spot inverter, AGC noise inverter, and then to the IF AGC detector. From here the detector output (dc voltage) is applied to the 1st thru 3rd amplifiers to control the gain of the IF amplifiers. With the voltage at pin (1) of IC201 given by the voltage regulator RF AGC (R204), on the other hand, the RF AGC stage is delayed behind the IF AGC stage to obtain the RF AGC output from pin (30).

This RF AGC voltage is added to the RF AGC terminal of the tuner to control the gain of the tuner RF amplifiers, thereby keeping the video detector output amplitude constant regardless of the strength of antenna input signal.

Pin (a) Output voltage from AGC detector (pin (2) of IC201)

Pin (B) RF AGC voltage of the tuner. Use the RF AGC cut-in point (about 55 dB of antenna input) and R204 (RF AGC control) for "A" level adjustment.

Figure 4. AGC Voltage and antenna inputs

3. AFT (Automatic Fine Tuning)

The carrier signal from the sync detector carrier coil (T204) is sent to the AFT-detector coil (T203).

The carrier signal which differs in phase depending on frequencies enters pins (2) and (2) The carrier, on the other hand, is applied to the AFT-detector inside the IC201 for detecting the phase difference, and the AFT-detector output is suppled to pin (2) The AFT-detector signal is now applied to the AFT terminal of the tuner to control the tuner's local frequencies for the best image at all times.

Fig. 3 shows the AFT-detector voltage characteristic.

Figure 3. AFT-detector voltage

The AFT switch is interlocked with the micro-computer. This switch is off during the preset mode and momentarily off at the channel selection. The figure shows the relation between the voltage at pin @of IC201 and the frequency of PIF P-carrier with AFT in action. It indicates about 6.5 V DC at fo.

5. SIF (Sound IF)

The audio IF signal amplified by the PIF amplifier of IC201 is transferred to the SIF detector circuit via the pre-amplifier to provide the SIF (5.5 MHz) signal, which still contains video signal, at pin (20) This signal is then filtered by the band-pass filter (CF301) to eliminate the video signals. The pure 5.5 MHz SIF signal alone is fed into pin (18)

In IC201, the SIF signal is detected at the FM detector (peak differential detector) circuit through the limiter amplifier to provide the audio signal. Then the audio signal is sent to the DC attenuator circuit and outputted to pin (7)via the audio driver (buffer amplifier). Here, C301 at pin (2) is a capacitor of the de-emphasis circuit. Pin (16) determines the gain of amplifiers with different feedbacks of the audio driver amplifier.

Audio Output Circuit

The audio signal coming from pin ⑦ of IC201 is applied to IC301 via pin ② where it is amplified about 30 dB and goes out of pin ⑩ of IC301.

Capacitor at pin (4) is to prevent abnormal noise which may be caused when the power switch is turned on.

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. .gale e

VIDEO/PAL COLOUR CIRCUIT (See Figure 6)

Single IC801 accepts the composite signal from the PIF (Pix. intermediate frequency) circuit to process both the Video and Chroma signals (PAL colour).

VIDEO Circuit

The composite signal from the PIF circuit is sent to the 5.5 MHz ceramic filter CF202 to eliminate audio signals, and is then sent to Buffer amplifier Q203. One signal from Q203 goes to the Chroma circuit and the other signal to the Video circuit to be added to the Video delay line (DL401). This line incorporates 4.43 MHz chroma traps to eliminate the Chroma signals. The resultant signal enters IC801 via pin (1)

The Video signal from the double-differential high pass filter is applied to pin (1) for the high frequency compensation of the video signal.

Changing the bias at pin @facilitates CONTRAST control and @helps control BRIGHTNESS. Here, the Video signal (Y signal) is supplied from pin (5) to the out put stages of video signals.

Before the increased CRT beam is developed, the bias at pin (2) is decreased and the contrast level is minimized to prevent the beam current from increasing.

The Video peaking constant circuit is at pin (13) and the pedestal clamping time-constant circuit is at pin (14)

PAL COLOUR Circuit

The composite signal from the Buffer amplifier Q203 goes through the band pass filter of R801, C801, L801, C802 and C816. Only the Chroma signal frequencies are fed into IC801 via pin (2) In IC801, the Chroma input is processed at the 1st and 2nd stage amplifiers and the output appears at pin (2) On the other hand, the signal passing through the 1-H Delay line (DL801) and the direct signal are combined at the 1-H Delay phase transformer (T801) to provide separate R-Y and B-Y Chroma signals. The R-Y signal is fed to pin (2), and the B-Y signal to pin (2), and the 3-azis demodulation is made at the R-Y/B-Y Demodulator.

The colour difference signals of R-Y at pin (2), B-Y at pin (2), and G-Y at pin (19) are available.

The crystal oscillator: X801 between pins (6) and (7) performs the 4.43 MHz subcarrier oscillation. And phase adjustment between the burst and the subcarrier signals is made by the APC time-constant circuit (consisting of C410, C411, R420 and C412) located between pins (4) and (5) and by the Phase transformer T802.

Here, the ACC filter which consists of C805 and R802 is at pin (27), and Killer filter C806 and R830 is at pin (26)

The subcarrier phase-shift circuit of C811 and L803 is at pin

The Gate Pulse Former Q401 accepts the sync signal and the FBT pulses to provide the burst gate and pedestal clamping pulses. The Blanking Pulse shaper D404, D405 and D406 receives the FBT and vertical output pulses to form video blanking and flip-flop triggering pulses of the PAL switch.

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Figure 6

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The vertical output circuit IC502 receives the signal coming from the vertical oscillator circuit IC501, and amplifies it to produce a deflection current which will be applied to the deflection yoke.

Going out of pin (2) of IC501, the signal (e₁ shown in Fig. 7) is applied via R505 to pin (4) of IC502 in which it is subjected to the vertical deflection and goes out of pin (2) entering the deflection yoke: refer to V_C2 and i₀ shown in Fig. 7.

The voltage booster in IC502 is to work when the set is operating at the vertical blanking period. At the time, there appears a boost-up voltage (V_C3 shown in Fig. 7) at pin (7) of IC502 and is applied via C510 to pin (3) where the supply voltage is made twice as large as before. The pulse width of the boost-up voltage is adjustable with change of the voltage division ratio by R521 and R520.

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HORIZONTAL DRIVE/HORIZONTAL OUTPUT CIRCUIT

Q601 is a horizontal drive transistor which is driven by means of pulse voltage coming from pin of IC501 through R608, T602 is a horizontal drive transformer; Q602 is a horizontal output transistor and its function is like that of a damper diode: C618 is the resonance capacitor.

C622 is a S-curve correction capacitor which, by the aid of C631 in parallel with it, can vary the horizontal size of picture, and L607 is a horizontal linearity correction coil. Flyback transformer T601 not only supplies power to the high voltage heater of CRT but initiates the two rectifier circuits (115v, 24V) and also 15V, 12V.

Figure 8. Horizontal Drive/Horizontal Output Circuit

FIELD TIMEBASE/LINE TIMEBASE CIRCUIT

IC501 is a field timebase/line timebase IC which covers the functions of sync separator, vertical sync circuit, vertical oscillator, vertical drive circuit, horizontal phase detector, horizontal oscillator, horizontal drive circuit and hold down protector.

1. Field timebase circuit

Positive sync pulse coming from pin (6) of IC501 is frequency divided by R612 and C602 to become a vertical sync pulse to be applied to pin (7) via C601. The vertical oscillator is of threshold type with sync lock system, and the oscillation frequency is controlled by C503 in connection with pin (5) as well as external bias circuit (R502, R503, V-hold control) in connection with pin (8) the sawtooth voltage caused at the oscillator circuit and the voltage fed back from the vertical output circuit are added together and amplified by the differential amplifier circuit, the resultant signal of going out of pin (3).

R501, R618, R534, R526, R507 and C507), each in connection with pin (4), are to adjust the vertical linearity of picture: R506, R508 (V-size control) and R512, each in connection with pin (3) to adjust the picture amplitude. The side of C507, if grounded, can result in zero drive voltage to stop the vertical output operation.

2. Line timebase circuit

Composite video signal is applied via C603 and R601 into pin (15) of the sync separator circuit, and its output is a sync pulse of about 12Vp-p which goes out of pin (16) R604, R605, C607 and C606, each in connection with pin (14) form a phase locked loop filter, and the sawtooth voltage obtained from an integration of the flyback pulse is applied to pin (13) R647 (H-CENT control) to adjust the horizontal phase shift: C611, C612 and R611 (H-frequency control), each in connection with pin (12) are to decide the oscillation frequency: if voltage applied to pin (16) is more than 0.6V, the output from pin (10) ceases and stops horizontal output operation.

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Figure 10. Line Timebase Circuit

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POWER SUPPLY REGULATOR CIRCUIT

The power supply circuit of this model is of the type with isolated primary and secondary sides using a switching regulator. The main components are in an encapsulated unit and the supply voltage is factory-set. The main features are as follows:

Double insulated construction completely isolates the primary and secondary sides giving a so-called "cold chassis".
(ii) The number of components is greatly reduced ensuring improved reliability.
(iii) No mains supply adjustment is necessary.
(iv) The major circuitry is in a single package, simplifying replacement if necessary.

OPERATION

Fig. 1 1-1 is a block diagram of the power circuit where the power supply regulator IC is enclosed within the broken line. How the circuit works is here explained:

(1) When the power switch is turned on, AC voltage is applied to the rectifier circuit, and couples to the regulator transformer via pin (4) and goes out of pin (1). Then it feeds the switching circuit. (B₀ = 280V with AC 20V input)
(2) Upon starting to turn on the power switch, the voltage at point (B) is 0 V to keep the error detector circuit turned off. And the current i, from the start circuit is applied to the switching circuit to turn it on.
(3) With the current i₂ flowing from pin (4) to pin (1) of the transformer, there is caused a current i₃ at pin (5) and it is applied to the drive circuit. With this current i₃ given, the switching circuit is further turned on, resulting in more amount of the current i₂.
(4) As the current running in the switching circuit is saturated, the current i₃ is discontinued to turn off the switching circuit.
(5) As the self-excited oscillation mentioned above continues to occur, the secondary output voltage at pin (1) of the transformer gradually increases. And when it increases to such degree as to cause the horizontal circuit to be turned on, there is generated a pulse current i₄ at pin (1) of FBT.
(6) The pulse current i₄ is mixed with the current i₃ across D1 to be applied to pin ② of the IC. With the current i₄ from the FBT given, the switching circuit is allowed to operate in sync with the horizontal circuit.
(7) If the secondary output voltage at pin (1) of the transformer further increases and exceeds the set value (+115 V), there is also an increase of the voltage at pin (3) of the transformer, by which the drive current at pin (2) of the IC is so limited as to control the operation of the switching circuit, thereby to have the secondary output voltage return to the set valve (+115V).

See Fig. 1 1-2 for the voltage and current waveforms at each part of the power circuit (with AC 230V input).

Protective Circuits
Pulse clipper circuit

When the switching circuit is changed from ON state to OFF state, there is caused an instant rise of the voltage at the point A, which may damage the switching circuit. To avoid this, the pulse clipper circuit works to cut off such high voltage across D_a

• Soft starter circuit and over current limiter circuit When the power switch is turned on, there is caused a rush current for a while.

These two circuits, with the power switch turned on, operate to protect the switching circuit against the rush current.

• D₂ and D_z

Both of these become operative only when the power circuit is put in some trouble.

(1) D_z (135 V avalanche diode)

If the IC or other part(s) gets in trouble so that the secondary output voltage (B₁) exceeds 135V, D_z is shorted to make zero the voltage B₁

(2) D₂

If the switching circuit is accidentally shorted, there is an abnormal rise of the voltage at pin (2) of the IC across the drive circuit, which may result in damages to the other parts.

To prevent this, D₂ turnes on, with such voltage rise, so that the resultant current is grounded with the fuse being blown out.

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Figure 11-1. Power Supply Block Diagram

A: Voltage waveform at pin 3 of IC
A: Current (i₂) waveform at pin 3 of IC
B: Current (i₃ + i₄) waveform at pin 2 of IC
C: Voltage waveform at pin 11 of transformer
D: Voltage waveform at pin 3 of transformer
E: Voltage waveform at pin 11 of FBT

Figure 11-2. Waveforms at Each Part of Power Circuit (with AC 230V input.)

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CIRCUIT DESCRIPTION

VOLTAGE SYNTHESIZER TUNING SYSTEM

1. OUTLINE

IC1002 (IX0442CE) is a CMOS 4-bit microprocessor which works as a voltage synthesizer, and in combination with EAROM (IX0439CE), it constitutes an efficient TV tuning system which makes it needless to use a battery backup function.

Its major functions are as follows:

Channel presetting with use of manual up/down keys and band switch.

[Tuning keys: T(+)/T(-), Fine tuning keys: FT(+)/FT(-)]

(2) Direct tuning of up to 16 stations or their sequential tuning.

(3) Remote-controlled reception
(4) Built-in 14-bit digital-to-analog converter (to control the tuning voltage)
(5) Built-in 6-bit digital-to-analog converter (to control the sound volume)
(6) Program number display on screen by CRT display IC (IX0412CE)
(7) Last program memory function
(8) Power-off timer (30 min., 60 min.)
(9) Last volume memory function

Figure 12.

2. BLOCK DIAGRAM

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3. PIN: ARRANGEMENT

4. FUNCTIONAL DESCRIPTION

4-1. Oscillator Circuit

4-2. Key Matrix

The IC1002 includes a CMOS inverter and a high feedback resistor so as to make up an oscillator circuit merely by using a ceramic oscillator and two capacitors as shown below.

Figure 14. Oscillator Circuit


Key scan output Key input	Co	C ₁	C ₂
Ko	T(+)	T()	POW
K ₁	FT(+)	FT()	_
Eo	Pr UP	Pr DN	—
VOL	VOL UP	VOL DN

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For all of the above keys, if each key is pushed for about more than 40 msec, its instruction is decoded and executed.

As to POW key out of those, pushing each key one time will cause its instruction to be excuted once. If both keys are pushed almost simultaneously, this causes no instruction; unless both keys are released, the next key operation is disabled. As to T(+/-), FT(+/-), Pr(UP/DN) and VOL(UP/DN) keys, if: two or more of those keys are pushed almost simultaneously, the lastly pushed key is effective and its instruction is executed.

And when the instruction of FT(+/-) or T(+/-) key is being executed, it is impossible to introduce the instruction of the preset switch or band switch. This means that pushing the preset switch or band switch is effective only after the instruction of FT(+/-) or T(+/-) key has finished.

Table 1-2.

Key input	Ko	K ₁
A ₃	VHF	UHF

The above two band switches are of lock type, and it is recommended to keep one of them turned on or to keep both of them turned off: avoid pushing them at the same time. When one of the band switches is turned on, the unit is in the preset mode and the band available then refers to the one assigned by that switch.

When the two band switches are both turned off, the unit is in the normal mode.

4-3. Preset Function

Figure 15.

The preset switch and band switches are configurated as shown in Fig.15 the design of which is that either one of the two band switches are turned on when the preset switch is turned on.

• Presetting method

Set the mode selector switch at PRESET position. Then the unit enters the preset mode, and the band then available is the one which has been selected by the band switch: at that time, AFT output stays turned off. And the preset mode is then displayed on screen like "V(or U)-12".
(2) Tune to the position where you want to preset a station.

When the tuning key is pushed, only the program number on screen is changed but the picture is kept unchanged.

(3) Push the desired band switch.

The band corresponding to the band switch pushed is then available and the band display on screen is changed accordingly.

The tuning voltage is set at its lowest value.

Table 2. Sweeping Speed of Tuning Keys (REF = "L")

Tuning key	т	T(+/-) FT(+/-
Band	Step width	Step Sweeping width time		Sweeping time
VHFL	4	About 20 sec	1	About 320 sec
VHF _H	4	About 40 sec	1	About 640 sec
UHF	4	About 80 sec	1	About 1280 sec

(4) Push one of T(+), T(-), FT(+) and FT(-) keys in succession to obtain the desired tuning voltage. When T(+) or T(-) key is pushed continuously, the

sweeping of tuning voltage occurs as shown in Table 2. And when the key is released, it is in the EAROM address corresponding to the position selected at that moment. The information about the currently available band, its tuning voltage and AFT (ON) is written.

In the case of presetting for VHF, to VHF, band, if the tuning voltage reaches its lowest or highest value with the tuning key being pushed, the band is changed automatically from VHF_L to VHF_H or vice versa. In case of presetting for UHF band, however, such band change doesn't occur, and when the tuning voltage goes up to its highest it restarts to go down until its lowest, and vice versa. The program display continues to flash at about 2 Hz as long as the tuning key is pushed. As for FT(+) and FT(-) keys, when each key is pushed, the sweeping of tuning voltage also occurs in the same way as with T(+) and T(-) keys and at the speed shown in Table 2. Note, however, that when the tuning voltage reaches its highest or lowest with pushing of the FT(+) or FT(-) key, the sweep operation stops there.

Repeating steps (2), (3) and (4) allows you to preset the desired positions one after another.

(5) Upon completion of the preset operation, set the mode selector switch at NORM position.

Then the unit is in the normal mode, in which the positio.. currently displayed on screen is tuned in.

While the unit is in the normal mode, when FT(+) or FT(-) key is pushed, AFT is turned off and the sweeping of tuning voltage is performed slowly at the speed shown in Table 2, and when the key is released, the information about the currently available band,

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and its tuning voltage and AFT (OFF) is written into the EAROM address corresponding to the position currently selected.

4-4. Tuning Operation

With this unit, up to 16 stations can be tuned either directly and independently or in sequence: the direct tuning is allowed with the remote control and the sequential tuning with either the remote control or the key matrix.

The tuned-in program number is displayed on screen by means of the CRT display IC1004 (IX0412CE).

(1) Timing of tuning operation

Figure 16.1 Timing Chart of Tuning Operation

(2) Sequential tuning

When PR UP or PR DN key, located at either the key matrix or the remote control, is pushed continuously, the programs numbers go up or down at intervals of about 0.7 second one after another, thus tuning of the desired station(s) being performed.

(3) Program number display

While the unit is in the CRT display-on mode*, the tuned-in program number continues to be displayed until the unit will be changed to the CRT display-off mode*.

While the unit is in the CRT display-off mode, the program number, if tuned in, is displayed for about 3 seconds and then it will be extinguished.

For the modes*, refer to the section of "Program Call" described later.

(4) How the tuning operation is performed when the unit is tuned on in the standby mode:

While the unit is in the standby mode, when POW key at the remote control or the key matrix is pushed, the tuning operation is performed in the timing shown in Figs. 16.2 and 16.3

Figure 16.2 Tuning Timing when the Unit is Powered on for the First Time after Auto Clear Operation

Figure 16.3 Tuning Timing when the Unit is Powered on in the Standby Mode

(5) When POW key is pushed a second time, the unit is powered off in the following timing.

Figure 16.4 Timing of Power-off Operation

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4-5. Remote Control Reception

The remote control transmitter is part no. IX0187PA.

When the unit receives the control signal from the remote control transmitter, the microprocessor IC1001 judges whether the code of the incoming signal is made of two words or of one word. If the signal is made of two serial words, the IC1001 considers that it is a proper signal, and then its instruction is executed. As the execution of the signal instruction proceeds, when the signal emission from the remote control transmitter is interrupted for about 180 to 200 msec, the unit will be out of the control of the remote control transmitter.

If the signal from the key matrix is applied to the unit while it is receiving the signal from the remote control transmitter, the instruction of the key matrix signal is executed instead of that of the remote control signal.

Table 3.	Remote Control	Transmission	Codes	and	Functions
	(Remote control	transmitter:	X0187F	PA)

		Т	ransmis	sion co	ode
INO.	D ₆	D ₅	D4	D ₃	D ₂	D ₁	Function
1	0	0	0	0	0	1	TV/VTR
2	0	0	0	0	1	0
3	0	0	0	0	1	1	VOL UP (S-Vol.Up)
4	0	0	0	1	0	0	VOL DN (S-Vol. Down)
5	0	0	0	1	0	1
6	0	0	0	1	1	0
7	0	0	0	1	1	1
8	0	0	1	0	0	0
9	0	0	1	0	0	1	MUTE
10	0	0	1	0	1	0	_
11	0	0	1	0	1	1	OFF TIMER
12	0	0	1	1	0	0
13	0	0	1	1	0	1	CALL
14	0	0,	1	1	1	0	POW (Power)
15	0	1	0	0	0	0	Pr 1
16	0	1	0	0	0	1	Pr 2
17	0	1	0	0	1	0	Pr 3
18	0	1	0	0	1	1	Pr 4
19	0	1	0	1	0	0	Pr 5
20	0	1	0	1	0	1	Pr 6
21	0	1	0	1	1	0	Pr 7
22	0	1	0	1	1	1	Pr 8
23	0	1	1	0	0	0	Pr 9
24	0	1	1	0	0	1	Pr 10
25	0	1	1	0	1	0	Pr 11
26	0	1	1	0	1	1	Pr 12
27	0	1	1	1	0	0	Pr 13
28	0	1	1	1	0	1	Pr 14
29	0	1	1	1	1	0	Pr 15
30	0	1	1	1	1	1	Pr 16

4-6. Sound Volume Control (VDP)

The sound volume is controlled with the output of VDP port. The output of VDP port is of PWM 6 bits, and its output waveforms are the ones pulse-modulated in 64 steps (repeated frequency: about 1 kHz, minimum pulse width; 16 µsec).

When the unit is in the muting-on mode, the output of VDP port is set at Low level.

When VOL UP key or VOL DN key is pushed, the analog level of sound volume will go up or down in 64 steps. It takes about 6 seconds for the highest (or lowest) volume to reach the lowest (or highest) volume.

When VOL UP key or VOL DN key is released, the analog level of sound volume available at that moment is written in the EAROM. (Last analog memory.)

4-7. Program Call

Pushing CALL key, on either the remote control or the key matrix, offers a toggle operation to cause the program number to appear on or disappear from CRT screen.

Each time CALL key is pushed, the Unit, if in the CRT display-on mode at present, is changed to the CRT display-off mode, and it, if in the CRT display-off mode at present, is changed to the CRT display-on mode.

When the unit has been in the CRT display-off mode, if a TV program is tuned in, its program number is allowed to appear on screen for about 3 seconds and then it disappears. when the power switch is turned on, the lastly tuned program number appears on screen for about 8 seconds and then disappears.

When the unit has been in the CRT display-on mode, the program number is allowed to appear on screen constantly.

In the case where the off timer has been turned on, each time CALL key is pushed, the unit enters into three modes, i.e., the program display-on mode, timer remainder display-on mode and CRT display-off mode, one after another and alternately.

In the timer remainder display-on mode, the timer's remaining time is displayed on screen at the decrements of 5 minutes constantly.

Page 17

4-8. Off-Timer

Each time OFF TIMER key is pushed, the off-timer is set at three position, i.e., "60 minutes", "30 minutes" and "reset" positions one after another and alternately.

When OFF TIMER key is pushed, the sign "60 M" or "30 M" appears on the upper right-hand corner of screen for about 3 seconds, and then disappears from there. Thereafter, the timer's remaining time is displayed on screen at the intervals of 5 minutes: each display lasts about 3 seconds.

And while the unit is in the CRT display-on mode, the timer's remaining time is in constant display on screen: the time display is changed at the decrements of 5 minutes.

The off-timer function is cancelled when the unit is powered off or when it is set at the preset mode.

4-9. Band Control Output

Band selection of either VHF_L, VHF_H or UHF is carried out with the combination of High level and Low Level signals available at the output ports B₀ and B₁, as shown in Table 4.

Table 4.

	Outpu	t port
Band	Bo	B ₁
VHFL	L	L
VHF _H	Н	L
UHF	Ľ	Н

4-10. Power On/Off Operation

When the main power switch of the unit is turned on, the auto clear operation occurs and then the unit goes into a standby mode.

Under the standby mode, when POW key, located on either the remote control or the key matrix, is pushed, the power output is controlled as shown in Table 5.

Table 5. Output Signals at each Port under Standby Mode

Output port	Output signal
B ₀ , B ₁ (Band output)	'Kept as it was*
B ₂ (AFT output)	"L"
B ₃ (Power output)	"L"
VDP (Volume output)	"L"
E ₃ (TV/VTR)	Kept as it was*
E ₁ (Chip select of IX0412CE)	"H"
E ₂ (Chip select of IX0439CE)	"H"
C ₀ , C ₁ , C ₂ , C ₃ (Control output of IX0439CE)	"H"
D/A (Tuning voltage)	"H"

Note *:

Just after the auto clear operation has finished, the ports B₀ and B₁ stay at Low level and port E₃ at Low level also.

Page 18

4-11. Tuning voltage output (D/A)

As shown in Fig. 18, there are pulse-modulated signals at the pin D/A of the IC(IC1001) and their generation depends on the 14-bit digital information data.

The period T₀ (8.2 mS) is divided into 64 subperiods each of which is called Ts (0.13 mS), and the subperiod Ts is 256 times larger than the minimum pulse width t₀ = 550 nsec (1.8 MHz).

The length of each sub-period Ts is referred to as Tm (m = 1 ~ 64) and it is decided by the following: The 14-bit data comprises 6-bit data (LSB) and 8-bit data (MSB).

Now suppose that the 8-bit data is of ^LSB00110000^MSB. and the 6 bit data is of ^LSB000000^MSB. In this case, the length Tm of each sub-period Ts will be 12 t₀ for all of T₁ to T₆₄.

Then if the tuning voltage is increased by one step, the 6-bit data will be 100000, and with this data given, the length of the sub-period T₃₂ will be 13 t₀ while that of each of the other sub-periods will be 12 t₀. And if the tuning voltage is increased by another one step, the 6-bit data will be of 010000, and in this case, the two sub-periods T₁₆ and T₄₈ will be of 13 t₀ in length while the other sub-periods will all be of 12 t₀ in length.

If the tuning voltage is increased in this way until the 6-bit data becomes 111111, the sub-period T₆₄ will be of 12 t₀ In length and the other sub-periods T₁ to T₆₃ will be of 13 t₀ in length. And if it is finally increased by another one step, the 8-bit data will be of 10110000 and the 6-bit data will be of 000000, and In this case, all the sub-periods t₁ to T₆₄ will be of 13 t₀ in length. From what we said above, is is seen that each of the sub-periods T₁ to T₆₄ is of either 12 t₀ or 13 t₀ in length, and their repeated frequency becomes 7 kHz (approximately calculated value).

Table 6 represents the relation between the 6-bit data (LSB) and the relative value of Tm.

Figure 18. Waveform of D/A Output

Figure 19. Filter Circuit

able 6. Relation between the 6-bit Data (LSB) and the Relative Value (Tm)

6-bit data (LSB)	Sub-periods having the length Tm of 13 To
LSB100000 ^MSB	m = 32
010000	m = 16, 48
001000	m = 8, 24, 40, 56
000100	m = 4, 12, 20, 28, 36, 44, 52, 60
000010	m = 2, 6, 10 58, 62
000001	m = 1, 3, 5 61, 63

4-12. Auto clear circuit

The circuit as shown in Fig. 20 is attached to the auto clear pin AC of the IC(IC1001) so as to cause the set to be derived of all the functions for a while when the power switch is turned on.

With operation of the auto clear circuit, when the supply voltage V_DD exceeds 4.5 V, the voltage V_C at the auto clear pin AC begins to rise and eventually reaches the value of V_C > V_TH1. And the time required for the V_C to be more than the value of V_TH1 is referred to as T_c. To make the auto clear circuit operate properly, the time T_C is set to more than 1 msec for this model and it is designed for V_c not to become less than T_TH2

Page 19

4-13. Memory IC

4-13-1.

The memory IC (iX0439CE) is an EAROM of 20 word x 16 bit formation and its N-MOS processing allows a serial transmission of both address and data using a single bidirection bus; designation of an address is performed by two of "1-OF-4" code which are transmitted one after another. There are eight modes available with this memory IC such as Address Input, LC Address Input, Data Input, Data Output, Erasing, Writing, Reading and Standby; each of them is selected by 3 bit parallel signals generated at the mode control pins C₁, C₂ and C₃ provided that the chip selector pin (CS) is set at Low level.

When the pin CS is at High level, the memory IC is kept inoperative even when it is given the mode selection input or clock signal input.

When the CS is set at Low level, never stop clock signal generation otherwise the memory IC won't offer its own dynamic function.

If the CS is once set at High level and then changed to Low level, it is needed to enter the address input and data input to the memory IC again.

4-14-2. Block diagram

Figure 22. Block Diagram of Memory IC

Pin	Name	Function
1/0	Data input/ output	In Address input, LC address input or Data input model, this pin works as an input pin to enable address or data entry operation. In Data output mode, this pin works as an output pin to put MOS NOS element in action. This pin is kept inoperation in Standby, Reading Erasing or writing mode.
Vss	PWB voltage	+5 V
V _GG	Supply voltage	-30 V
CLOCK	Clock input	This is a 14 kHz timing reference signal to be used for the operation in any mode.
C ₁ , C ₂ , C ₃	Mode control output	These are used for the mode control.
GND	Ground voltage	ον
cs	Chip select	When this is at Low level, a chip selection is performed.

4-13-3. Pin Functions of memory IC

Page 20

4-13-4. Mode selection

Table 8.

C1	C2	C₃	Selected mode
н	н	н	Standby mode: Contents of the address register and data register are held as they are, and the output buffer is made inoperative.
Н	н	L	LC address input mode: LC address data available at I/O pin is transferred to the address register to be stored. This address is of 4 words.
н	L	н	Erasing mode: Content of the memory transistor is erased according to the address designation by the address register.
н	L	L	Address input mode: Address data available at I/O pin is transferred to the address register to be stored. This address is of 16 words.
L	н	н	Reading mode: Content at the designated address of the memory transistor is transferred to the data register.
L	н	L	Data output mode: Content of the data register is taken out in timing with the clock signal.
L	L	н	Writing mode: Content of the data register is written in the memory transistor according to the address designation by the address register.
L	L	L	Data input mode: Data available at I/O pin is fetched in the data register; contents of the address register remain as they are,

4-14. CRT Display Control

The CRT display control IC(iX0412CE) causes the received channel number and the timer's preset time to be displayed

on CRT screen; the display is represented by characters of 5 × 7 dot matrixing.

Page 21

SERVICE ADJUSTMENT

PIF/AFT/SIF ADJUSTMENT

Tuner IFT coil:

T201 (in RUNTK0095CEN1) already adjusted

Receive ch 9 signal. (If reception of ch 9 signal is not satisfactory receive V_H band signal instead.)
2. Connect sweep generator to the tuner's test point.
(Use a 75 ohm DC cut probe.)

Sweep output level: 80 dB

Note: The sweep generator's earth lead must be grounded near the test point.
3. Connect response lead (low impedance probe with detector) to collector of Q201 (in RUNTK0095CEN1).

Voltage setting of PIF AGC: Apply DC 3.9 V to pin ④ of RUNTK0095CEN1.
5. Voltage setting of RF AGC: Apply DC 4 V to tuner AGC.
6. Short TP601 and TP602 (to stop sync separator circuit).
7. Adjust the tuner IF coil to have the waveform, as shown figure below.

Picture signal and carrier signal must have the same level.

38.9 MHz carrier filter:

T204 (in RUNTK0095CEN1) already adjusted

Connect signal generator to pin (2) of PIF IC (IC201). (in RUNTK0095CEN1) Generator's output level: 90 dB
- non modulation (38.9 MHz)
2. Connect VTVM or oscilloscope (DC range) to TP203:
3. Voltage setting of PIF AGC: Apply DC voltage (about 5.0 V) to pin (4) of RUNTK0095CEN1.
Note: The applied voltage should not exceed DC 7.0 V. 4. Adjust T204 so that DC voltage at TP203 is minimum.
- At the end of adjustment, see that there appears DC 4 V at TP203.
  - If not, readjust from the beginning.

AFT rough adjust:

T203 (in RUNTK0095CEN1) already adjusted

1. Connect sweep generator to pin (9) of PIF IC (IC201). (in RUNTK0095CEN1)

Generator's output level: 90 dB

2. Connect response lead to TP203.

3. Short TP601 and TP602.
4. Voltage setting of PIF AGC:

Adjust DC voltage (about 5.0 V) to pin ④ of RUNTK0095CEN1 and adjust to have 1 Vp-p of wave-form on oscilloscope.

Note: The applied voltage should not exceed DC 7 V.
5. Adjust T203 so that the depressed point of waveform is at 38.9 MHz as shown in figure below.

Overall waveform

1. Set the band selector at V_H (III) position and adjust the tuning control to have output voltage of about 13 V at V_T terminals.
Connect sweep generator to tuner's test point. (Use an initial stage detecting probe.) Generator's output level: 70 dB
3. Connect response lead to TP203. (Use a 10 k ohm direct probe having been used in AFT rough adjustment.)
4. Voltage setting of RF AGC: Apply DC 4 V to tuner AGC. RF AGC: about -20 dB

probe with

Page 22

5. Short TP601 and TP602 (to stop sync separator circuit).
6. Connect 120 ohm damping resistor between pins @and ⑦of IC201. (in RUNTK0095CEN1) Note: Damping resistor leads should be as short as
possible. 7. For adjustment of PIF AGC: Connect DC voltage (about 5V) to pin (4) of RUNTK0095CEN1 and adjust so that
waveform of TP203 is at 1 Vp-p.
8. Check the overall waveform.

AFT fine adjust: T203

Set the mode switch at AUTO position and recieve standard PAL colour bar signal. Input intensity: Over 55 dB
Connect oscilloscope to TP203. Oscilloscope range: 0.5 V/div. Sweeping time: 20 µsec/div. Sync operation: Horizontal
Connect signal generator's output to Tuner IF terminal. Generator's output level: About 50 dB Generator's output frequency: 38.9 MHz ± 5 kHz

4. Set band select switch VHF position, then AFT circuit will turn off automatically.
5. Adjust tuning control to have zero beating on oscilloscope.
6. Set band select switch NORMAL position, then AFT circuit will turn on automatically.
7. Adjust T203 to have zero beating on oscilloscope as shown in figure below.

Adjustment error: 38.9 MHz ± 25 kHz

RF AGC cut-in: R204

Receive VIII band signal. Input intensity: Within 75 dB to 85 dB Connect oscilloscope to TP203.
Oscilloscope range: 0.2 V/div. Sweeping time: 20 µsec/div. Sync operation: Horizontal
Turn R204 until there appears noise on oscilloscope as shown in Fig. (a).
4. Turn back R204 slowly until the noise disappears on oscilloscope. At the time, horizontal sync signal should keep on the same level as before. (Fig. (b))
5. Set signal intensity at 90 to 95 dB, and see that there is no cross modulation nor sound beating on oscilloscope.
6. Set signal intensity at 60 to 65 dB, and see that there is no noise on oscilloscope.

Figure (b).

SIF detection coil: T306

1. Voltage setting of PIF AGC: Apply DC 3 V to pin (2) of IC201.
2. Adjust sound volume to maximum.
3. Connect signal generator's output to pin (1) of RUNTK0095CEN1.

Frequency: 5.5 MHz
Modulation: 400 Hz, AM 30 %
Generator's output level: 74 dB
4. Connect oscilloscope to pin (3) of RUNTK0095CEN1. Oscilloscope range: 50 mV/div.

Page 23

5. Adjust T306 so that AM signal (400 Hz) on oscilloscope becomes minimum.

VIDEO CHROMA ADJUSTMENT

CRT cut-off adjust:

R853; R-bias

R859: G-bias

R865; B-bias

Screen control

Receive monoscope pattern signal. (Instead of monoscope pattern signal, if is allowed to use black/white pattern signal.)
Set R857 (G-drive) and R863 (B-drive) at CENTER position. Set R853 (R-bias), R859 (G-bias) and R865 (B-bias) at MIN position.
3. Set screen control at MIN position,
4. Short TP401 and TP402, then raster will appear on CRT.
5. Turn screen control clockwise slowly until the horizontal raster appears slightly, and stop it.
One of the three colours (R, G and B) appears first as screen control is turned. So, touching off the bias control belonging to the first colour, use and move the other two bias controls clockwise until the raster becomes white.
- Note: Be careful not to cause the raster to appear too brightly; or there will be a fear of CRT burning.
7. Turn screen control counter-clockwise until the raster disappears, and stop it.

Whitebalance/background adjust: R857: G-drive

R863; B-drive

1. Receive black/white pattern singal.
2. Set contrast control at MAX postion.
3. Set brightness control at MAX position.
4. Connect beam ammeter to TP603 and TP604.
5. Adjust R406 (sub-contrast) so that beam current is 1100µA.
6. Adjust R857 and R863 to let the colour temperature (white) be at 7300°K.
7. Adjust contrast and brightness controls so that beam current is 350 µA then see that colour temperature (background) is still at 7300°K. If not, readjust from the beginning.

Sub-contrast adjust: R406

Receive monoscope pattern signal. (Instead of monoscope pattern signal, it is allowed to use white pattern signal of 88% modulation.)
2. Set contrast control at MAX position.
3. Set brightness control at MAX position.
4. Connect beam ammeter to TP603 and TP604. Ammeter setting: Full scale 3 mA Connection of ammeter: (-) side to TP604, and (+) side to TP603
5. Adjust R406 so that beam current is 1100 µA.

Chroma

1. Connect pattern generator (PM5508) or similar to the receiver: the antenna input is about 71 dB.
2. Set contrast and brightness controls at MAX position, and colour control at CENTER position.
3. Set the pattern to "MATRIX".
4. Adjust T801 to obtain uniform brightness-the same for every scanning line.
5. Set the pattern to "DELAY".
6. Adjust R804 to obtain uniform brightness-the same for every scanning line.
7. Set the pattern to "PHASE" Adjust T802 to have-the same colour shading in both upper and lower parts of picture.

SYNC/DEFLECTION ADJUSTMENT

H-freq. adjust: R611

1. Receive monoscope pattern signal.
2. Short TP601 and TP602.
3. Adjust R611 for good horizontal sync.

H-size tip

Receive test card pattern signal. (when receiving CCIR standard system B/G signal, its pattern should be adjusted for overscanning.)
Arrange the position of H-size tip to have H-size be at 8 % (10 % max.) of overscanning.

V-size adjust: R508

Receive test card pattern signal. (when receiving CCIR standard system B/G signal, its pattern should be adjusted for overscanning.)
Adjust R508 at a time for good V-size. V-size should be at 8 % (10 % max) of overscanning.

Page 24

CRT ADJUSTMENT

Focus control

1. Receive test card pattern signal.
2. Set contrast control at NORMAL position.
3. Set brightness control at MAX position (with 1100 µA of beam current).
Adjust focus control to have best focus at the central area of CRT.

Purity magnet

Receive test card pattern signal. (when receiving CCIR standard system B/G signal, its white pattern signal should be used for the adjustment.)
2. Degauss CRT shadow mask with degaussing coil.
3. Prior to the adjustment, operate the receiver for more than 10 minutes.
4. Set purity magnets at the horizontal position.
5. Bring deflection yoke as near purity magnet as possible.
Set R853 (R-bias) and R865 (B-bias) at MIN position, then turn R859 (G-bias) until green raster appears.
7. Adjust purity magnets for a uniform green vertical band at the center of CRT screen.

For this adjustment, motion of each magnet should be as slight as possible.

8. Shift deflection yoke toward CRT to achieve uniform green purity on the entire of CRT screen.
9. Perform white balance operation and see if white balance in picture is normal.

Convergence

1. Receive crosshatch pattern signal.
2. Set contrast control at MAX position.
3. Set brightness control at CENTER position.
Static (center) convergence:
4. Rotate 4-pole magnet to converge red and blue lines.
5. After completing red and blue center convergence, rotate 6-pole magnet to converge the red and blue and green lines.
Dynamic convergence:
6. Convergence of the three colour fields at the edges of CRT screen is accomplished by positioning of deflection yoke tilt adjustment wedges.
7. After the adjustment, secure deflection yoke with wedges.

(Adjustment in A direction)

(Adjustment in B direction)

CRT DISPLAY ADJUSTMENT

CRT display character position adjust: R1029

1. Receive test card pattern signal.
2. Let the set tune in 2 ch. signal.
3. Push channel call button.
4. Adjust R1029 so that the edge of the character 2 is positioned about 40 mm away from CRT edge.

Page 25

TROUBLE SHOOTING TABLE

Page 26

Page 27

Page 28

C • •

Page 29

Page 30


	DADT	'e i iet		Ref. No.	Part No.	Description	Code
		JLIJI			INTEGR/	ATED CIRCUITS
Replacen identified are identi The use of same safe parts sho hazards. To have y following	PARTS REF hent parts which have the in this manual: electrical fied by A in the Replacent of a substitute replacement ety characteristics as the which which is service manual "HOW TO ORDER RE your order filled promptly information. 1. MODEL NUMBEL 3. PART No.	PLACEMENT ese special safety characteristic components having such feat ment Parts Lists. ent part which does not have the factory recommended replace ul may create shock, fire or othe EPLACEMENT PARTS" and correctly, please furnish t R 2. REF. No. 4. DESCRIPTION	ics :ures ie ment er	IC202 IC203 IC301 IC501 IC502 ▲ IC701 IC801 IC1001 IC1002 IC1003 IC1004 IC1005	RH- iX0260CEZZ RH- iX0249CEZZ RH- iX0250CEZZ RH- iX0065CEZZ RH- iX0465CEZZ RH- iX0465CEZZ RH- iX0457CEZZ VHI UPC1373H- 1 RH- iX0442CEZZ RH- iX0439CEZZ RH- iX0412CEZZ VHI PST520C2- 1		AF AE AK AK AK AK AH AW AQ AQ AT
Ref. No.	Part No.	Description	Cod€	9	TRA
	PICTUF	RETUBE		Q203,	VS2SC1815GW-1	2SC1815(G)	AB
Δ Δ DY Δ L703	VB370KRTC201E RCiLH1402CEN3 RCiLG0210CEZZ PMAGF3006CEZZ PSPAG0031CEZZ	CRT (ITC) Deflection Yoke Degaussing Coil Purity Magnet Wedge	++ AZ AL AK AC	1007 Q401, 402, ∆ 604, 1004 Q601 ∆ Q602 Q603, 750 Q751,	VS2SA1015Y/1E VS2SC2271-D1A VS2SD1554//1E VS2SC2236Y/-1 VS2SC1815GW1E	2SA1015(Y) 2SC2271 2SD1554 2SC2236(Y) 2SC1815(G)	AC AD AD AB
	PRINTED WIRING B (NOT REPLAC	OARD ASSEMBLIES SEMENT ITEM)		1001, 1014 Q1003 Q1005 Q1006	VS2SC383 - WT - 1 VS2SC3399// - 1 VS2SC3402// - 1	2SC383 2SC3399 2SC3402	AE AB AB
PWB-A PWB-B	DUNTK3358WEV0 DUNTK3301WEV1	Mother PWB Assy CRT Socket PWB Assy	-
	DUNTK3358V	VEV0 (PWB-A)			D	IODES
	TUNER AND A	SSEMBLY UNIT		D301, ▲ 705,	RH-DX0123CEZZ		AC
	NOTE: The parts here show but not independent	n are supplied as an assembly dy.		∆ 710 D401 \| 405,	RH-DX0179CEZZ		AA
Δ	VTUVTS-7NH/// RUNTK0095CEN1	VHF/UHF Tuner PIF/SIF/AFT Unit	BH BB	607,
	PACKAGE	) CIRCUITS		752, 753,
X801 X1001 ∆ POR701	RCRSB0002CEZZ RFiLA0008CEZZ RMPTP0028CEZZ	Crystal 4.43 mHz Ceramic Oscillator Positive Coefficient Thermistor	AM AE AG	754, 1002, 1008 \| 1011, 1013, 1017 D406	RH- DX0046CEZZ		AC
				D407 408, 1015	RH-DX0005GEZZ		AC

Page 31

Ref. No.	Part No.	Description	Code	Ref. No.	.No. Part No. Description		iption	Code
D501,	RH-DX0110CEZZ		AB	CONTROLS
603, A 706				R204	RVR-B4060GEZZ	5K(B)	RF-AG	àC	AB
D502,	RH-DX0127CEZZ		AC	R406	RVR-B5140CEZZ	30K(B)	Sub-C	ontrast	AB
605				∆ R438	RVR-B5200CEZZ	5K(B)	V-Hold	t i	AH
∆ D601	RH-EX0152CEZZ	Zener Diode	AE	DEOD		\| 10K(B)		Contrast/Colour
D602,	RH-DX0126CEZZ		AC	R508	RVR-B4475CEZZ		Horizo	al Size	AC
D604	BH-FX0022TA77	Zener Diode	AB	R647	RVR-B4700CEZZ	300K(E	3) Horizo	intal Center	AB
D604	RH-DX0202CEZZ		AD	R804	RVR-B5134CEZZ	1K(B)	, 1H Del	lay	AD
▲ 709				R1029	RVR-M7133TAZZ	4.7K(B	Chara	cter Position	AC
D614	RH-EX0051CEZZ	Zener Diode, RD22E	AB
/∆ D701	RH-DX0055TAZZ		AD

A 704	PH-DV01640E77		AC		CAPA	CITORS
D750	BH-DX0107TA77		AF
D751	RH-EX0047CEZZ	Zener Diode	AB	C308	VCEAAA1EW227M	220	25V	Electrolytic	AC
D1001	RH-PX0004AEZZ	Photo Conductive Layer	AK	C313	VCEAAA1EW227M	220	25V	Electrolytic	AC
D1'003	RH-PX0146CEZZ	LED	AE	C316	VCKZPA2HB102K	0.001	500V	Ceramic	AA
D1004	RH-EX0020GEZZ	Zener Diode	AE	C317	VCEAAA1EW337M	330	25V	Electrolytic	AD
TH1001	RH-HZ0004CEZZ	Thermistor	AB	C421	VCCSPA2HL120K	12P	500V	Ceramic	AA
				C503	VCEACA1HC335J	3.3	50V	Electrolytic	AC
1				C508		100	351	Electrolytic	AC
				C510	BC-EZ0088CEZZ	1000	25V	Electrolytic	AE
	СС	DILS		C516.	VCKYPA2HB102K	0.001	500V	Ceramic	AA
		·····		617,
L214,	VP-DF120K0000	12µH	AB	619,
801,				625,
1002				▲ 714,
				▲ 717		470	0.51/	Flander hatin
1005	VP-CE3B3K0000	3.3#H	AB	C612	VCOPSA2AA272G	470	35V 100V	Polypro Film
302.		C.Op. 1	1.5	C616	VCEAAA2CW105M	1	160V	Electrolytic	AB
606				C618	VCFPPD3CA682J	0.0068	1.6kV	Metalized	AE
L401	VP-MK470K0000	47µH	AB					Polyester
L501,	VP-CF100K0000	10μΗ	AB	C621	VCQPSD2DA224K	0.22	200V	Polypro Film	AC
601		47µH	AB	C622	VCQPSD2DA334K	0.33	200V	Polypro Film	AD
L605	RCiLP0013GEZZ		AD	C626	RC-EZ0103CEZZ	220	25V	Electrolytic	AC
L607	RCiLZ0449CEZZ		AD	A C628		100	161/	Electrolytic
L608,	VP-DF470K0000	47μH	AB	C631	VCOPSC2DA104K	0.1	200	Polypro Film	AC
803		4.00H		C635	VCEAAH2CW107M	100	160V	Electrolytic	AF
L609	RCILE0075CEZZ			C644	VCKYPA2HB221K	220P	500V	Ceramic	AA
L701	RCiLF0076CEZZ	Line Filter	AK	办 C701	RC-FZ0018CEZZ	0.22	AC250V	Metalized	AH
∆ L705,	VP-DF8R2K0000	8.2µH	AB					Polyester
802				∆ C702,	RC-KZ0029CEZZ	0.01	AC250V	Ceramic	AC
▲ L706	VP-CF331K0000	330µH	AB	₼ 703	Or BC-KZ00180EZZ
L/U9, 710		4μΠ		A C706	BC-EZ0055CE77	150	400V	Electrolytic	AN
L1001	RCiLi0405CEZZ		AE	∆ C709	VCEAAA2AW105M	1	100V	Electrolytic	AB
				∆ C710,	VCEAAA2AN106M	10	100V	Electrolytic	AC
1	DELA	Y LINES		₼ 711
				▲ C712	VCQPSC2JA333K	0.033	630V	Polypro Film	AB
DL401	RCiLZ0391CEZZ		AG	∆ C716	VCFYHA1HA473J	0.047	50V	Mylar	AB
DL801	RCILZ0287CEZZ		AS	▲ C719,	RG-KZUU22GEZZ	90089	ZKV	Ceramic	AD
				/// /20	BC-KZ0025CEZZ
				_ ∆ C722.	RC-KZ0016CEZZ	0.01	AC250V	Ceramic	AC
TRANSFORMERS
				▲ C725	VCKZPA1HB103K	0.01	50V	Ceramic	AA
A T601	RTRNF1412CEN1	Flyback Trans.	вв	∆ C726	RC-KZ0024CEZZ	1000P	2kV	Ceramic	AM
▲ T602	RTRNZ0179CEZZ	Horizontal Drive Trans.	AE	∆ C727	VCKYPH3DB561K	560P	2kV	Ceramic	AC
∆ T701	RTRNZ0136CEZZ	Regulator Trans.	AT	C752	VCEAAA1HW107M	100	50V	Electrolytic	AC
▲ ⊤750	RTRNP0312CEZZ	DC Supply Trans.	AQ	C755		220	25V	Electrolytic	AC
T801	RCiLZ0345CEZZ	Chroma, 1H Delay Line	AD	61015		220	107	LIECT DIVIC
T802	HCiLV0134CEZZ	\| Filter, Phase Coll	AD

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Ref. No.	Part No.	De	scription	Code	Ref. No.	Part No.	Description	Code
RESISTORS					MISCELLANEOUS
R218	VRS-VV3DB123J RR-XZ0040TAZZ RR-XZ0027CEZZ VRS-PU2HB223J	12K 2W 5.6 ½W 2.2 ½W 22K ½W	Metal Oxide Fuse Resistor Fuse Resistor Metal Oxide	AA AC AB AA	▲ F701 ▲ FB601,	QFS-C2022TAZZ QFSHD1002CEZZ RBLN-0010CEZZ	Fuse T2A Fuse Holder Ferrite Bead	AE AA AC
▲ R453, ▲ 633, ▲ 656 ▲ R523 ▲ R529 ▲ R529	VRD-RA2EE105J RR-XZ0035TAZZ RR-XZ0029CEZZ	1M ¼W 22 ¼W 3.3 ½W	Carbon Fuse Resistor Fuse Resistor	AA AB AB
R619	VRD-RAZBETU4J VRS-VV3SDB103J	10K 2W	Carbon Metal Oxide	AA AA	DUNTK3301WEV1 (PWB-B)
R623	VRW-KP3HC100K	10 5W	Cement Cement	AC	TRANSISTORS
▲ R629 R630 ▲ R632 ▲ R637,	RRI-RV3ABTR2J RR-XZ0027CEZZ VRS-PU2HB102J VRD-RA2BE224J VRD-RA2BE103J	1.2 1W 2.2 ½W 1K ½W 220K ¼W 10K ¼W	Metal Film Metal Film Metal Oxide Carbon Carbon	AB AB AA AA AA	Q851, 852, 853,	Q851, VS2SC2271-D1A 2SC2271 852, 853,		AD
ム R643 本 R644	VRD-RA2HD3R3J	3.3 ½W	Carbon	AA
▲ R649 ▲ R650	RR-XZ0027CEZZ VRD-RU2EE152J	2.2 ½W	Fuse Resistor Carbon	AB	DIODE
쇼 R651 쇼 R654 쇼 R664 쇼 R701	RR-XZ0073CEZZ VRD-RA2BE473J VRD-RU2EE392J VRW-KP3HC6R8K	270 ½W 47K ½W 3.9K ¼W 6.8 5W	Fuse Resistor Carbon Carbon Cement	AB AA AA AC	D851	RH-DX0179CEZZ		AA
▲ R702	VRD-RA2HD823J	82K ½W	Carbon	AA
ム 707 本 R708 本 R709, 本 710	VRS-VV3AB272J VRD-RA2HD823J	2.7K 1W 82K ½W	Metal Oxide Carbon	AA AA	L851	VP-CF681K0000	680µH	АВ
Δ R711 Δ R712 Δ R713	VRD-RA2EE473J VRD-RA2HD472J RR-XZ0073CEZZ	47K ¼W 4.7K ½W 270 ½W	Carbon Carbon Fuse Resistor	AA AA AB
⊥ R714 ⊥ R716,	VRD-RA2HD331J VRD-RA2HD100J	330 ½W 10 ½W	Carbon Carbon	AA AA	CONTROLS
▲ 723 ▲ R717, 718, 724	VRD-RA2HD2R7J	2.7 ½W	Carbon	AA	R853, 859, 865 R857	RVR-B4567CEZZ	5K(B) Red Bias Green Bias Blue Bias	AC
▲ R719, ▲ 720	VRC-UA2HG825K	8.2M ½W	Solid	AA	863	AVN-B4302UEZZ	Blue Drive	AC
▲ R722 ▲ R725, ▲ 726	RR-XZ0011GEZZ VRD-RA2HD154J	47 ½W 150K ½W	Fuse Resistor Carbon	AB AA
R750	VRS-VV3AB102J	1K 1W	Metal Oxide	AA	CAPACITORS
SWITCHES AND RELAYS					C854	RC-KZ0023CEZZ	4700P 2kV Ceramic	AD
S401 S501 ▲ S701 ▲ S1001	QSW-B0015CEZZ QSW-B0015CEZZ QSW-P0371CEZZ QSW-K0014CEZZ	Service Switch V-CENT Switc Main's Switch Up-Down Swi	AC AC AK AC	0800		10 160V Electrolytic	AC
\| ∆ 1004.					MISCELLANEOUS
▲ 1004, ▲ 1006 ↓ ▲ 1009 ▲ $1005 $1011 ▲ $1012 ▲ RY750	QSW-P0378CEZZ QSW-S0048TAZZ QSW-R0029CEZZ RRLYZ0021CEZZ	Power Switch Switch Band Switch Relay			∆ ∆ SP301	QSoCV0818CEZZ or QSoCV0811CEZZ CACCL3007CE01 VSP0080P-97WA QANTR0037CEZZ UBATU0009CEZZ RRMCG0299CESA RRMCG0299CESB	CRT Socket AC Cord Speaker Rod Antenna Battery R/C Transmitter (White) R/C Transmitter (Silver)	AK AL AP AN AL BC BC BC
						RRMCG0299CESB	R/C Transmitter (Silver)

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Ref. No.	Part No.	Description	Code	Ref. No.	Part No.	Description	Code
	CABINE	T PARTS
1	CCABA1497CE29	Front Cabinet Ass'y	BG	1-7 1-8	JBTN- 1238CESA HDECQ0245CESA	Up/Down Button	AF AD
1	CCABA1497CE28	Front Cabient Ass'y (Silver)	BG	1-9	JBTN-1236CESA	Power Button	AC
1-1	Not Available	Front Cabinet		2	GCABB1500CESA	Back Cabinet (White)	AV
1-2	GDoRF1378CESA	Door (White)	AG	2	GCABB1500CESB	Back Cabinet (Silver)	AV
1-2	GDoRF1378CESB	Door (Silver)	AE
1-3	HBDGB1057AFSA	"SHARP" Badge	AD
1-4	HINDM2409CESA	Front Indicator Plate	AC
1-5	HINDP2119CESA	Osc. Filter Cover	AD
1-6	HINDM2410CESA	Indicator Plate in Door (White)	AC
1-6	HiNDM2410CESB	Indicator Plate in Door (Silver)	AC

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SOLID STATE DEVICE BASE DIAGRAM

RH-DX0107TAZZ

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PIF/SIF PACK SCHEMATIC DIAGRAM

MODEL C-3705NZ

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SHARP DIVISION Thorn EMI Consumer Electronics NZ Limited Administration & Commercial Centre, Cnr Mahunga Drive & Hastie Avenue Mangere Bridge, Auckland, New Zealand Service Centre: 25 Mahunga Drive, Mangere Bridge Phone: (09) 642-059 — All Departments Box 59-051 Mangere Bridge, Auckland N.Z. Telex: NZ21211 Cables: THORNRAD

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FT - [

SYNC SEP OUT

CRT-PWB

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