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. ELECTRICAL SPECIFICATIONS . . . . . . . . . . . . .
. IMPORTANT SERVICE NOTES . . . . . . . . . . . . .
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DESCRIPTION OF NEW CIRCUIT. . . . . . . . . . .
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NEW COSMOS-3 CHASSIS
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.
Page
Aerial Input Impedance . . . . . . . . . . 75 ohm unbalanced
Convergence
. . . . . . . . . . . . . .
1
3
Audio Power Output Rating . . . . . . . . . . . . . . 2W
Intermediate Frequencies
Picture IF Frequency . . . . . . . . . . . . . .
Sound Carrier Trap . . . . . . . . . . . . . . . .
Adjacent Sound Carrier Trap . . . . . . . . . 38.375MHz
. . . . . . . . . . . . . . . . . . . .240VAC50Hz
Powerlnput
Power Consumption . . . . . . . . . . . . . . . . . . . . . .80 W
Speaker
. . . . . . . . . . 5 cm x 9 cm Oval Dynamic x 1
Sweep Deflection . . . . . . . . . . . . . . . . . . . . .
Tuning Ranges . . . . . . . . . . . . VHF Channels 9 thru 11
Self Converging System
Magnetic
UHF Channels 28 thru 63
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Summary of Contents for Sharp DV-5145
- Page 1 NEW COSMOS-3 CHASSIS 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. Page Aerial Input Impedance ..75 ohm unbalanced .
- Page 2 X-RAY...
- Page 3 1. Outline of IClOl (3) Tuning voltage available in 16,384 steps due to D/A (1) IClOl consists of ROM (1270 words 8 bits) and output. RAM (32 words 4 bits). (4) Channel number display by 2-digit 7-segment LED. (2) Presetting of the described stations allowed by (5) Display of 11 ch.
- Page 4 5. Key operation at each mode Normal mode Preset mode When one of “1” to “10” keys is pushed, the data When one of “1 fl to “10” keys is pushed, the 1 - 10 of the corresponding position is read out of the corresponding position is displayed on LED.
- Page 5 1. Outline of IC203 Pin 0: SIF input PIF amplifier of sync demodulator type Pin @: SIF.horizontal oscillator ground Negative modulation AGC detector circuit Pin 0: Video output Tuner RF AGUIF AGC Pin @: AFT AFC circuit Pin @: AGC detector Video preamplifier Pin @I: IF sync detector circuit Sound IF amplifier and demodulator circuit...
- Page 6 1. Outline of IC501 4. Circuitry bhaviors (I) High output (I) The vertical oscillation signal entering pin @ of (2) Lower power consumption thanks to the built-in pump up circuit output circuit. (3) The number of external parts reduced circuit are in action, it is only in the flyback period 2.
- Page 7 1. Oscillation principle 2. Operational principle of error amplifier (1) When the power switch is turned on, a current IsI is (1) The voltage which is induced at N3 winding is DC applied to the base of TR5. rectified to produce a control voltage (between pins (2) Then, a current lc=hfe.ls, is applied to the collector of TR5.
- Page 8 1. Outline of MO1 3) R/G/B mixing circuit included 2) White peak limiter control circuit 4) Sand castle pulse processor 2. Pins arrangement Figure 5. 3. Circuitry behaviors Pin 0: 12V power supply Pin 0: Black level clamping (only with R/G/B signal Pin 0: Generation of ACC detector control voltage Pin @I: input) to provide the same black level in both...
- Page 9 6. Check that the overall waveform is within the speci- fied range shown below. How to prevent ICs from damages due to static elec- tricity When replacing or handling the IC, be sure to put on your wrist a metal ring (earth ring) that is connected to ground.
- Page 10 RF AGC cut-in adjustment: RZ25 Sub-brightness adjustment: R415 1. Receive 10 ch. signal. 1. Short TP401 and TP402. 2. Set the signal input level at 52 + 1 dBu. 2. Set each control as follows: 3. Connect CR oscillator to TP202 across a capacitor of Screen control: at MIN position 10 uF/lGV: This capacitor is to cut off DC supply.
- Page 11 9. Adjust each drive control for good white balance. Horizontal size adjustment: S601 Colour temperature: 7300°K 1. Receive monoscope pattern signal. 2. If the horizontal size is at less than 7% of overscan- 10. Adjust brightness control and contrast control to ning, insert the socket into the opening (2) of SSOl.
- Page 12 is normal? 25V line is normal? is normal? Check D701 - 704, Check Q702, D706, D708, T701, Check D502, 0711, 115 V line. R725 Waveform at base of 0601 Check R724, Check R617 Q701, Q703, and T602. D710 and D716. ((HI-4 terminal) Check IC203.
- Page 13 Check IC801. Check RlllOand Check IC801. Q203 Tuner. Check Check Q850,0851 and Q852. Video Switch Unit.
- Page 14 Waveform at Check IC203. a n d Check L501. Check IC201, Waveform at Check IC301. Check SP301,...
- Page 15 R E A R V I E W 0401...
- Page 17 Mother Unit CRT Socket Unit...
- Page 18 LED Unit 75CEZZ ] Power Switch Unit 3 0 0 2 Earphone Jack Unit c 101 Control Unit...
- Page 20 - d a L - J m l - - - ---’ I - - - - - - - - > ; ; ; --------...
- Page 25 PARTS MARKED WITH NOTE: MAINTAINING THE SAFETY OF THE SET. BE SURE TO RE- RESISTOR PLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAIN- Resistance values are shown in ohms: ING THE SAFETY AND PERFORMANCE OF THE SET. K= 7,000 M= 7,000,OOO All resistores are l/8 watt, unless otherwise noted.
- Page 26 a thode...
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Page 27: Parts List
PART NO. REF. NO. DESCRIPTION PARTS LIST R H - i X0365CEZZ PARTS REPLACEMENT R H - i X0640CEZZ R H - i X0689CEZZ R H - Replacement parts whrch have these special safety characteristics Identified rn this manual; electrical components having such fea- t u r e s a r e rdenttfred by B The use of a substitute replacement part which does not have the TRANSISTORS... - Page 28 REF.NO. DESCRIPTION CODE REF. NO. PART NO. PART NO. DESCRIPTION P A C K A G E D C I R C U I T S ’ - CONTROLS X801 R225 R V R - B 5 1 4 0 C E Z Z 3 0 k (B) R F - A G C A G AR415 Sub-Brightness Thermistor...
- Page 29 REF.NO. PART NO. DESCRIPTION CODE REF. NO. PART NO. DESCRIPTION c 7 1 9 R C - EZOl 5 5 C E Z Z 2 7 0 Electrolytic AG C725 R C - FZ0021CEZZ 0 . 1 250V M e t a l i z e d A C TRANSISTORS Polyester C726...
- Page 30 CODE REF. NO. PART NO. DESCRIPTION CODE PART NO. DESCRIPTION REF.NO. TRANSISTORS DIODE 0 4 0 0 5 , 4006, R H - PXOl 6 4 C E Z Z L E D - Channel Number 4007, 4008, 4010 4011 CONTROLS Picture R V R - G4003CEZZ...
- Page 31 AC Cord Holder Window Plate Knob - Slide Control H B D G B 1058AFSA Badge “SHARP” J B T N - 1010CESA Button - Mono/Stereo J B T N - 1 3 2 1 C E S A Button - Power...
- Page 32 S H A R P MW.KY...