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Roadstar CTV-1015, Service Manual

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Roadstar CTV-1015 Service Manual Download Page 36

4. NO SOUND (PICTURE is “OK”)

Replace IC61 with new one.

NO

START

END

Check the waveform between

pin 

1 of IC61 and GROUND

See that the mode state

(pin 3 of IC62 is  HIGH )
(MUTE:LOW, normal:HIGH)

OK?

See that the sound state is  MUTE

Check the waveform between

pin 

9

of IC61 and GROUND.

OK?

Check the waveform of Aout at 

pin 44 of IC51.

See that there is no signal 

in the IF output of TU01, Z101.

NO

YES

TROUBLE SHOOTING

FM MONO 

Summary of Contents for CTV-1015

Page 1: ...Service Manual CTV 1015 R CTV 1015 Service Manual CTV 1015...

Page 2: ...ACCESSORIES RECOMMENDED BY THE NUFACTURER A PRODUCT AND CART COMBINATION SHOULD BE MOVED WITH CARE QUICK STOPS EXCESSIVE FORCE AND UNEVEN SURFACES MAY CAUSE THE PRODUCT AND CART COMBINATION TO OVERTU...

Page 3: ...color shading If color shading is evident demagnetize the receiver If color shading still persists perform purity and convergence adjustments This should be all that is necessary for optimum receiver...

Page 4: ...es 2 Plug in the CRT deflection yoke Tighten the clamp screw 3 Plug the convergence yoke into the CRT and set it as shown in Fig B 1 4 Input a black and white signal 5 Fully demagnetize the receiver b...

Page 5: ...ENCE MAGNET ASSEMBLY FIG B 3 CENTER CONVERGENCE ADJUSTMENT FIG B 2 CENTER CONVERGENCE ADJUSTMENT Vertical Green Belt ADJUST BLUE BLUE BLUE RED RED RED BLUE RED GREEN 4 POLE MAGINETS MOVEMENT 6 POLE MA...

Page 6: ...R ANTENNA IMPEDANCE OPERATING FREQUENCIES RECEIVING CHANNELS PAL SECAM BG DK I L NTSC Playback AC 90 250V 50 60Hz 45W DC 12 24V 40W 1 0W 75 OHM UNBALANCED TYPE VIDEO IF 38 9MHz SOUND IF 33 4MHz VHFL C...

Page 7: ...STAND BY LAMP 2 Remote Control Sensor 3 Power Switch 4 TV VIDEO Key 5 Speaker 6 Program Up Down Key 7 Volume Up Down Key 8 Earphone Jack 9 Antenna Holder 10 Antenna Jack 75 ohm 11 Scart Jacks 12 AC I...

Page 8: ...s should last about a year under normal use lf the operation is unstable either channel or volume does not change replace the batteries When the hand unit is not used for a long or when the batteries...

Page 9: ...two digit program number if shown ex1 Press 7 if you d like to watch program number 7 ex2 Press 1 7 if you d like to watch program number 17 If you want to watch program number 7 while is already on...

Page 10: ...pecific program number OSD color of the current program number will change from green to magenta 3 If you want to watch the skipped program number use 10 digit key to view it then press SKIP button or...

Page 11: ...l the pre set data befote the replacement After the replacement select factory mode and set the initial data referring to the written down data If you fogot to write down all the pre set data or you c...

Page 12: ...it 9 UOC CONTROL You do not need to Select it 10 V CHIP TEST You do not need to Select it Select each adjustment mode by pressing CH up or CH down button And access it by pressing vol up or vol down...

Page 13: ...ENT Min Cnt Max Don t select it Don t select it 2 SCREEN Voltage Adjustment Turn the TV set to receive a color bar pattern Standard picture Connect the probe of oscilloscope to the RK Red Cathode of C...

Page 14: ...obe of CRT Analyzer at the center Position of picture screen Adjust CONTRAST BRIGHTNESS until Y value of CRT analyzer becomes 35FL above roughly Select 2 W BAL and press Vol button And then R CUT 32 w...

Page 15: ...DA2007A is a class AB dual Audio power amplifier assembled in single in line 9 pins package specially designed for stereo application in music centers TV receivers and portable radios Features HIGH OU...

Page 16: ...nt Drain Curent 50 90 mA PO Output Power each channel f 100Hz to 6KHz d 0 5 VS 18V RL 4 VS 22V RL 8W 5 5 5 5 6 6 W W d Distortion each channel f 1KHz VS 18V RL 4 PO 100mW to 3W f 1KHz VS 22V RL 8 PO 1...

Page 17: ...CP over current protection circuit TSD Thermal shutdown circuit BLOCK DIAGRAM PIN CONFIGURATION PIN 1 2 3 4 5 SYMBOL D S GND VIN O C P F B Description Drain Terminal Source Terminal Ground Terminal Po...

Page 18: ...ces DMOS transistors are used in the output stage because of absence of second breakdown SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT Supplies VP supply voltage 7 5 12 18 V VFB flyback supply voltage...

Page 19: ...BLOCK DIAGRAM Full bridge vertical deflection output circuit in LVDMOS TDA8357J...

Page 20: ...TEST CONDITIONS Measurement must be executed under the ambient conditions of the room temperature and humidity Temp 25 2 Humidity 65 5 RH The following conditions shall be applied for the measurement...

Page 21: ...TUNER TERMINAL FOR EXTERNAL CONNECTION ELECTRICAL CHARACTERISTICS...

Page 22: ...TUNER RECEIVING CHANNEL FREQUENCY TABLE...

Page 23: ...TUNER RECEIVING CHANNEL FREQUENCY TABLE...

Page 24: ...TUNER RECEIVING CHANNEL FREQUENCY TABLE...

Page 25: ...requency and positive negative overshoot ratio and black stretching Integrated chroma band pass filter with switchable centre frequency Only one reference 12MHz crystal required for the Controller Tel...

Page 26: ...INSERT CCC WHITE P ADJ 80C51 CPU I 2 C BUS TRANSCEIVER ROM RAM TELETEXT ACQUISITION 1 10 PAGE MEMORY TELETEXT OSD DISPLAY R G B BL Y U V H V REF ENHANCED VST PWM DAC VST OUT I O PORTS I O PORTS 4x 3 3...

Page 27: ...rtical drive B output vertical drive A output IF input 1 IF input 2 reference current input vertical sawtooth capacitor tuner AGC output audio deemphasis of SIF input 1 decoupling sound demodulator of...

Page 28: ...TV sound AM demodulator and audio source switch TDA9830...

Page 29: ...TV sound AM demodulator and audio source switch TDA9830...

Page 30: ...TV sound AM demodulator and audio source switch TDA9830...

Page 31: ...trol FEATURES Typical bandwidth of 5 5 MHz for an output signal of 60V p p High slew rate of 900 V No external components required Very simple application Single supply voltage of 200 V Internal refer...

Page 32: ...i 2 Vi 3 GND Iom VDD Voc 3 Voc 2 Voc 1 PIN 1 2 3 4 5 6 7 8 9 DESCRIPTION incerting input 1 incerting input 2 incerting input 3 ground fin black current measurement output supply voltage cathode output...

Page 33: ...eakage in each voltage with multi meter OK Check the short circuits of D881 D882 D883 and D884 Check the open circuits of R882 OK Fix all the short circuits Is there low or abnormal voltage neverthele...

Page 34: ...K Check the pin 1 2 3 waveforms of IC91 in CPT PCB Check the pin 7 8 9 waveforms of IC91 Check the pin 6 voltage of IC91 OK Check the output voltage of IC52 IC83 and IC53 Check the waveform of X001 12...

Page 35: ...k the pin 1 2 3 of IC91 OK Check pin 51 52 53 waveforms of IC51 OK Check pin 1 4 5 waveforms of Z101 OK Check pin 38 waveforms of IC51 Check the pin 40 waveforms of IC51 OK Check the waveform of IF pi...

Page 36: ...and GROUND See that the mode state pin 3 of IC62 is HIGH MUTE LOW normal HIGH OK See that the sound state is MUTE Check the waveform between pin 9 of IC61 and GROUND OK Check the waveform of Aout at...

Page 37: ...C31 OK Check D382 Check IC31 and Peripheral parts NO V2 DC13 7V YES YES NO NO Check the waveform at pin 4 7 of IC31 OK Check the waveform of the posive sawtooth pin1 and negative sawtooth pin2 of IC31...

Page 38: ...BLOCK DIAGRAM...

Page 39: ...ZJ9 1B VZ8 57 9 01 0 5W DR02 11115641T ZD MTZJ9 1B VZ8 57 9 01 0 5W DR03 11115641T ZD MTZJ9 1B VZ8 57 9 01 0 5W DV51 11115641T ZD MTZJ9 1B VZ8 57 9 01 0 5W DV52 11115641T ZD MTZJ9 1B VZ8 57 9 01 0 5W...

Page 40: ...AL02TB 10UH K L061 11237100T COIL AXIAL LAL02TB 10UH K L101 11237109T COIL AXIAL LAL02TB 1UH K L162 11237100T COIL AXIAL LAL02TB 10UH K L201 11237569T COIL AXIAL LAL02TB 5 6UH K L202 11237569T COIL AX...

Page 41: ...M R881 12919105T CARBON RESISTOR SB 1 2W 1M OHM J R885 12368472T CARBON RESISTOR SB 1 6W 4 7K OHM J R886 12368681T CARBON RESISTOR SB 1 6W 680 OHM J R887 12977248T RES NKN1WSJT 52 0R24 OHM PRN R890 12...

Page 42: ...PF K AD D801 11115753 DIODE RK 46 LF015 304 SANKEN D802 11115753 DIODE RK 46 LF015 304 SANKEN D803 11115748 DIODE UFR FML22S D803A 11865889 HEAT SINK 10GN D803B 11032381 SCREW TTB 3 8 SZN D803C 119710...

Page 43: ...4 12094210T CERA CAPA DM3DYB222K725 2KV2200 C991 12095133B P CAP 250V 4 4MF TNU C993 12794102T CHEMICON 16V 1000MF 85C 10 20 D991 11114647 THYRISTOR TF361M H501 300924032B HARNESS 9P 320MM IC91 111181...

Page 44: ...8090S 9V 3A PIN5 IC82A 11865591 HEAT SINK 10AF IC82B 11032381 SCREW TTB 3 8 SZN IC82C 11971010 COMPOUND SILICON YG6260 L801 11229001 COIL CHOKE KTN 0001 150UH L802 11229001 COIL CHOKE KTN 0001 150UH...

Page 45: ...10AJ6RS Y104 11142044 MATCHING UNIT KC 408 Y104 11142044C MATCHING UNIT MT 503N Y105 11943230A LAMINATE BAG W410 H200 Y106 23968006 STAPLE Y108 11934061 PAD EPS 10AJ Y201 11124077 ROD ANT 3SEC 800MM 2...

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