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34

3-4.

SIF Adjustment

(1) Input  the following signal conditions to the IC301 Pin48

(TP1).
(FM/SG)
CARRIER

4.5MHz

LEVEL

90dB

µ

MOD

OFF

(2) Adjust L207 so that the voltage at IC301 Pin1 (TP21) becomes

4.5V 

±

 0.3VDC.

(Simple Adjustment Method)

(1) Connect an oscilloscope to IC301 Pin1 (TP21), then receive

a television broadcast.

(2) Adjust L207 so that the center of audio signal level becomes

4.5V.

(2) Adjust L201 so that center section (

a 

section in the figure

below) of the ALIGNMENT SCOPE waveform becomes
60.25 MHz 

±

 50 kHz.

3-5.

TRAP Adjustment

(1) Make connections as shown in figure below.

4.5V

   5V

60.25MHz

a

TU 101 

 

Pin 

!

 (TP2)

ATT

LSW-480

VIF

ALIGNMENT

SCOPE

IF

DETECTOR

DC POWER

SUPPLY

Q201

COLLECTOR

<IF DETECTOR>

TO ALIGNMENT
SCOPE

Ge DIODE    1000pF

FROM Q201
COLLECTOR

1000pF

  Ge
DIODE

DO AS SHORT
AS IT CAN

IF DETECTOR

DC POWER
SUPPLY
4.6V

GERMANIUM DIODE: ISS-188 FM...etc.

0V

Summary of Contents for TV-CN202

Page 1: ...COLOR TELEVISION TV CN202 S M Code No 09 995 333 9R1 NH1C3 SERVICE MANUAL R E V I S I O N D A T A This Service Manual is the Revision Publishing and replaces Simple Manual S M Code No 09 995 333 9T1 ...

Page 2: ...set Channels 181 Aerial Input 75 ohms unbalanced Picture Tube 20 510 mm Screen Size 404 W x 303 H x mm 16 x 12 in 480 mm diagonal 19 in Video Input Output 1 Vp p 75 ohms Audio Input 0 5 Vrms 33 k ohms more Audio Output 0 5 Vrms 2 2 k ohms less Speaker 76 mm 3 in round 2 Operating Voltage 110 240 V AC 50 60 Hz Power Consumption 85 W Earphone Jack Mini jack Operating Temperature 5 C 40 C Operatin Hu...

Page 3: ...n resistance and perform the voltage withstand test See Fig 1 1 The insulation resistance must be 7 0 to 9 5 MΩ when applying 500V per second 2 In the voltage withstand test apply 3 6 KV for 3 seconds and check that the GO lamp lights the designated parts must be used 4 Put parts and wires in the original position after assembling or wiring There are parts which use the insulation material such as...

Page 4: ... Hook Anode button Fig 4 Hook CRT Anode cap CRT Hook 2 1 Fig 3 Anode cap Hook CRT Anode button Fig 2 6 Turn over the anode cap on the side where the hook was released and pull out the cap in the direction opposite to that on which the cap was pushed See Figure 4 Caution Do not pull out the anode cap straight up Do not pull the cap forcibly After removing the cap check that the hook is not deformed...

Page 5: ...the cap does not turn Left Right Anode cap Installation section Fig 1 1 Fig 2 High voltage cable Anode cap Fig 3 2 2 Anode cap reinstallation 1 Use a clean cloth moistened slightly with alcohol to clean the installation section See Figure 2 Caution Check that the installation section is free from dust foreign matter etc 2 Coat the anode cap installation circumference with an appropriate amount of ...

Page 6: ...t the center of the cap and hold the cap between your thumb and middle finger See Figure 5 1 6 Apply the hook on one side to the anode button as shown on the figure See Figure 5 2 Caution Check that the hook is held securely 7 Apply the hook on the other side to the anode button as shown in Figure 5 3 Fig 5 Anode button Fig 5 2 Anode button Hook Hook 30 Anode button Hook Fig 5 3 ...

Page 7: ...ee Figure 6 Skirt Anode cap 1 1 1 2 1 2 2 Front cabinet Rear cabinet Fig 6 Fig 1 Front cabinet PWB MAIN CN401 Speakers 2 1 PWB NK CN903 CN801 Degauss cord 3 CASE REMOVAL 3 1 Rear Cabinet Removal See Figure 1 1 Remove four screws 1 and three screws 2 then remove the rear cabinet in the direction of the arrow 3 2 Neck C B PWB NK Removal See Figure 2 1 Disconnect CN903 CRT GND 2 Remove the Neck C B i...

Page 8: ...205 87 018 134 080 CAPACITOR TC U 0 01 16 C207 87 016 632 080 CAP E 0 47 50 SSL C208 87 018 131 080 CAP CER 1000P 50V C210 87 018 134 080 CAPACITOR TC U 0 01 16 C211 87 A10 585 080 CAP CER 18P 50 J CH C214 87 018 134 080 CAPACITOR TC U 0 01 16 C215 87 016 637 080 CAP E 10 50 SSL C216 87 018 134 080 CAPACITOR TC U 0 01 16 C218 87 016 583 080 CAP E 100 25 SSL C219 87 018 134 080 CAPACITOR TC U 0 01 ...

Page 9: ...A L204 87 005 604 080 COIL 15UH J LAV35 L205 87 003 146 080 COIL 15UH LAL02 L206 84 LB2 682 010 COIL AFT 45 75 SA L207 84 LB2 683 010 COIL SIF 4 5M SA L208 87 005 485 080 COIL 100UH J FLR50 L301 87 003 051 080 COIL 470UH L303 87 003 149 080 COIL 47UH L304 87 003 147 080 COIL 22UH L305 87 003 295 080 COIL 10UH L306 87 003 147 080 COIL 22UH L501 87 005 608 080 COIL 33UH J LAV35 L603 87 A50 040 010 C...

Page 10: ...S901 84 LB3 610 010 SOCKET CRT HPS1171 SFR901 87 024 519 080 SFR 470 DIA6 V NTP SFR902 87 024 519 080 SFR 470 DIA6 V NTP SFR903 87 024 520 080 SFR 1K DIA6 V NTP SFR904 87 024 520 080 SFR 1K DIA6 V NTP SFR905 87 024 520 080 SFR 1K DIA6 V NTP REF NO PART NO KANRI DESCRIPTION NO TRANSISTOR ILLUSTRATION 2SC2785 2SA1175 2SC3779 SE115N 2SD2333 2SC2688 E C B E C B 2SC3467 2SK2541 2SJ460 E C B S D G B C E...

Page 11: ...CC D L CLAMP BRIGHT HOR C D AFC 2 PHASE SHIFTER HDP DSC AFC 1 HOR DRIVER Y OUT FBP DET FBP DET BGP OUT SYNC SEP SHARP BLACK EXPAND 1ST BPA GND V 1DEO CHR MA JUNGLE 2ND BPA CONTRAST SOFT VER SYNC SEP HOR COIN APC DET LOCK DET VIDEO DET FM DET ATT AF AMP VIF AMP RF AGC IF AGC APC ACC KILLER TINT VCO OSD COLOR DEMO CARRIER F OSD SWITCH VIF SIF VCC JUNGLE VIDEO CHROMA VCC VIF SIF GND VCO AFT VIDEO AMP...

Page 12: ...12 IC TDA2007A IC LA7953 7 4 9 2 5 3 8 6 1 GND 5VR VS OUT 2 INPUT 2 INPUT 1 INPUT 2 OUT 1 INPUT 1 ...

Page 13: ...14 13 BLOCK DIAGRAM ...

Page 14: ...16 15 SCHEMATIC DIAGRAM 1 MAIN C B SECTION ...

Page 15: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 A B C D E F G H I J 18 17 WIRING 1 MAIN C B SECTION ...

Page 16: ...20 19 SCHEMATIC DIAGRAM 2 N K C B SECTION WIRING 2 N K C B SECTION 14 13 ...

Page 17: ... 1kHz Mono IC501 Pin 12 5 ms div 10 V div Between X301 C304 0 1µ div 200 mV div IC301 Pin 25 0 5 µs div 50 mV div IC1 Pin 20 5 ns div 1 V div IC301 Pin 18 IC301 Pin 19 20 µs div 1 V div 20 µs div 1 V div IC301 Pin 20 IC301 Pin 21 20 µs div 1V div 20 µs div 2 V div T601 Pin 1 20 µs div 50 V div T601 Pin 8 20 µs div 50 V div PlOx 1V PlOx 2V A 20µs TRG 0 0 d i v NORM SMSA PlOx 50V A 20µs HOLDOFF NORM...

Page 18: ...20 µs div 50 mV div IC301 Pin 44 20 µs div 0 5 V div IC301 Pin 1 50 µs div 0 5 V div PlOx 50V A 20µs HOLDOFF MIN NORM SMSA PlOx 50V A 20µs HOLDOFF MIN NORM SMSA PlOx 50V A 20µs HOLDOFF MIN NORM SMSA PlOx 500V PlOx 50V A 20µs HOLDOFF MIN NORM SMSA PlOx 5V PlOx 0 5V A 20µs HOLDOFF MIN NORM SMSA PlOx 0 2V PlOx 50mV A 20µs HOLDOFF MIN NORM SMSA PlOx 0 5V A 20µs HOLDOFF MIN NORM SMSA PlOx 0 5V A 50µs H...

Page 19: ...IC1 Pin 17 20 µs div 0 5 V div PlOx 0 5V A 20µs HOLDOFF MIN NORM SMSA 25 25 ...

Page 20: ...tected 12 DGC Not connected 13 PON O During standby mode H level is inserted to switch off horizontal deflection and high voltage 14 AVCC 5V supply 15 HLF Connected to filter 16 VHOLD Connected to condensor 17 CVIN I Video signal input 18 CNVSS Connected to ground 19 XIN I 8 MHz clock input 20 XOUT O 8 MHz clock output 21 VSS Connected to ground 22 VCC 5 V supply TUNER SAP TUNER STEREO Pin 23 Pin ...

Page 21: ...ut signal is detected H to mute 35 MONO O Compel the sound system to monaural Not connected Selecting tuner receiving band Pin 36 Pin 37 36 37 SEL1 SEL2 O TUNER L L Reset start Both of Pin 36 Pin 37 are H VIDEO 1 H L VIDEO 2 L H 38 VMUTE Not connected 39 BLK O OSD blanking output 40 B O OSD blue output 41 G O OSD green output 42 R O OSD red output Pin No Pin Name I O Description ...

Page 22: ... SUB BRIGHT IC402 FBT A MAIN C B B NK C B SFR301 SFR302 L203 SUB TINT RF AGC SFR201 TU101 TOP FOCUS VR BOTTOM SCREEN VR B DRIVE R DRIVE B CUT OFF G CUT OFF R CUT OFF S901 L206 T601 L201 VCO AFT SW501 V POS SFR501 V SIZE TP15 RF AGC TP903 SFR905 SFR904 SFR903 TP901 TP902 SUB TINT B Y GND NK Circuit board Solder side MAIN Circuit board Component side IC301 ...

Page 23: ...d the burst signal has an amplitude of about 0 3 V with flat envelope Confirm that ratio of the burst signal amplitude and the red signal amplitude is 0 30 0 66 If the output signal does not conform with the specifications calibrate the pattern generator Refer to pattern generator operation manual Use the LEADER LCG 404 for the pattern generator Color irregularity Before adjustment After adjustmen...

Page 24: ...se looking from the CRT s back screen and disengage Be careful not to loose the lock ring too much If the magnet assembly has become shifted during adjustments secure it to the position in Fig 1 4 3 Beam convergence adjustment 6 pole magnet With a 4 pole magnet align the G beam with the already aligned R B beam G R B RGB magenta white Align the G beam with the R B beam Fig 1 3 CRT DY DY lock screw...

Page 25: ...matics of red and blue 7 While looking at the screen adjust the tilt of the deflecting yoke and tighten the DY lock screw 8 Shift the magnet assembly to the front toward the CRT funnel stop movement before the adjustment position and then tighten the magnet lock screw At this time be careful not to shift the position of the purity magnet R B As there is occurrence of convergence distortion after c...

Page 26: ...le magnets together By adjusting the opening of the two magnets it is possible to adjust the amount of the beam s movement 1 Receive the dot pattern signal through the pattern generator 2 Pay attention to the center of the screen and perform adjustments with two 4 pole magnets so that the R beam and the B beam perfectly align and become a magenta color refer to Fig 1 2 3 In the same way pay attent...

Page 27: ...op it where red disappears from the screen 8 Turn SFR902 B DRIVE fully counterclockwise so the whole screen becomes blue 9 TurnSFR902 B DRIVE gradually clockwise and stop it where blue disappears from the screen 10 Repeat steps 2 4 and 5 9 until the white balance has been adjusted completey 11 Return the customer picture controls to their original positions 12 Receive a stairstep signal color bar ...

Page 28: ...nly for initial setting in the factory Make sure that the selector of SW501 is positioned at B center before adjusting Scale A Scale B Fig 2 3 Fig 2 4 b 2 7 Sub tint Adjustment 1 Receive an NTSC 3 58 MHz color bar signal 2 Connect an oscilloscope to Q903 Collector on the NK C B 3 Adjust SFR303 so the bottom edges of the waveform fall on one line See figure 2 5 1 H STRAIGHT LINE 20V Div 10µ sec Div...

Page 29: ... 2 2 Adjust L206 so that the voltage at IC301 Pin47 TP16 becomes 4 5V 0 3VDC 3 Receive each television broadcasts and vertify that the picture is clear 3 3 AFT Adjustment 1 Connect the resistance of 1 kΩ between the TU101 Pin11 and the GND 3 TUNER ADJUSTMENT 3 1 AGC Adjustment 1 Receive a NTSC signal of RF INPUT under the following conditions Input level 58 dBµ Modulation percentage 87 5 Received ...

Page 30: ... so that the center of audio signal level becomes 4 5V 2 Adjust L201 so that center section a section in the figure below of the ALIGNMENT SCOPE waveform becomes 60 25 MHz 50 kHz 3 5 TRAPAdjustment 1 Make connections as shown in figure below 4 5V 5V 60 25MHz a TU 101 Pin TP2 ATT LSW 480 VIF ALIGNMENT SCOPE IF DETECTOR DC POWER SUPPLY Q201 COLLECTOR IF DETECTOR TO ALIGNMENT SCOPE Ge DIODE 1000pF FR...

Page 31: ...8 hours it will reflect to 0000 H again Display 1 2 3 4 1 163 2 162 3 161 4 160 4660 Hours Example Fig 1 2 Content of Service Mode Test mode have the following functions 1 Function for releasing Auto Power OFF 2 Display AFT S curb status 3 Display the product Hours of CRT ON 1 AGING 2 AFT OK 3 0000H Fig 3 1 2 3 4 5 6 7 8 9 10 11 12 TEST KEY hidden key under label FINISH KEY hidden key under label ...

Page 32: ...LDR AC CORD 7 86 LB4 004 010 BTN POWER 8 87 JBC 628 010 AC CORD SET NH BLK 9 86 LB7 202 110 HLDR FBT 10 84 LB3 641 010 SP F DIA 7 6 11 87 A90 332 010 HLDR SF 2001 HV CABLE 12 87 JBD 605 010 CRT A48JAN44X04 W 13 84 LB3 205 010 SPR E EARTH 14 84 LB2 633 110 CONN ASSY 1P CRT GND 15 87 JBD 625 010 DGC 20 15 OHM 16 86 LB4 002 110 CABI REAR 17 87 JBG 004 010 PLATE JACK NH 18 84 LB3 216 010 HLDR LED A 87...

Page 33: ...727105 Printed in Singapore 2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 8710 JAPAN TEL 03 3827 3111 ...

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