Teac MV1421 Service Manual
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Teac MV1421 Service Manual

Teac MV1421 Service Manual

34cm / 48cm televideo
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SERVICE MANUAL
MV1421 / 1422 / 4822
34cm / 48cm Televideo
Chassis CP-420
DVT14F6H
DVT14F6HA
DVT20F6HA
Effective: December, 1999
MV4822SERV

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Summary of Contents for Teac MV1421

  • Page 1 SERVICE MANUAL MV1421 / 1422 / 4822 34cm / 48cm Televideo Chassis CP-420 DVT14F6H DVT14F6HA DVT20F6HA Effective: December, 1999 MV4822SERV...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. SPECIFICATIONS ..........................1 2. SAFETY INSTRUCTION........................3 3. BLOCK DIAGRAM..........................4 4. ALIGNMENT INSTRUCTIONS ......................7 5. SERVICE REMOCON DIAGRAM......................11 6. IC DESCRIPTION ..........................14 7. CIRCUIT DESCRIPTION ........................40 8. VOLTAGE CHARTS ..........................48 9.

  • Page 3: Specifications

    1. SPECIFICATIONS 1-1. TV PART TV STANDARD PAL B/G (F. FA M O DEL), PAL BIG SEC AM -L(L. LA M O DEL) PAL I (P.PA M O DE L) PAL/SECAM B/G D/K (D. DA M O DEL) SCREEN SIZE 14"...
  • Page 4 1-2. VCR PART G ENERA L tem perature ~ 35 (operating) ~ 60 (storage tem perature) form at standard tape width 12.65 m m tape speed SP : 23.39m m /sec LP : 11.70m m /sec m ax. recording tim e with SP : 240m in.

  • Page 5: Safety Instruction

    2. SAFETY INSTRUCTION BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, W ARN ING “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” BELOW. 2-1. X-RAY RADIATION PRECAUTION 1. E xcessive high voltage can produce potentially hazardous X -R AY R A D IATIO N .To avoid such hazards, the high voltage m ust not exceed the specified lim it.

  • Page 6: Block Diagram

    3. BLOCK DIAGRAM 3-1. Audio Signal Flow...
  • Page 7 3-2. Video Signal Flow...
  • Page 8 3-3. TV and monitor power switching...

  • Page 9: Alignment Instructions

    4. ALIGNMENT INSTRUCTIONS 4-1. MAIN TUNER AFT 1. STANDARD B/G 1) S et a signal generator w ith - R F FR E Q U E N C Y = 38.9 M H z - R F O U TP U T LE V E L = 80 5 dB uV 2) C onnect the signal generator R F output to TP 1 ( TU N E R IF O U TP U T ) T here m ust be no signal input to the TU N E R .

  • Page 10: White Balance

    4-6. WHITE BALANCE 1) A pply a C O LO R B A R PATTE R N S IG N A L. 2) A djust the R ,G ,B U P /D O W N K E Y of the other color w hich did not appear on the screen to obtain W H ITE . 4-7.
  • Page 11 4-9. ADJUSTMENT 1. X-POSITION AND P2,P3 ADJUSTMENT 1) A djust point : X -P O S ITIO N C hecking point : oscilloscope ch1 = H /S W (P Y 04 #6) oscilloscope ch2 = P B E N V E (P Y 04 #4) Triggering : C H 1 M easuring E quipm ent : oscilloscope, path jig M ode : P LAY B A C K ,ATK O FF...
  • Page 12 2. AUTO PG ADJUSTMENT 1) A fter adjustm ent of 9-1. P ress the " R E C ." button. 2) E ject the Test tape. 3. AZIMUTH ADJUSTMENT 1) A djust point : A ZIM U TH S C R E W C hecking point : S O U N D O U TP U T (P 601) M easuring E quipm ent : oscilloscope or audio level m eter.

  • Page 13: Service Remocon Diagram

    5. SERVICE REMOCON DIAGRAM 5-1. HOW TO CHECK TV SECTION WITHOUT VCR DECK IF Y O U W A N T TO C H E C K T V S E C T IO N W ITH O U T D E C K M E C H A N IS M , TH E N P LE A S E P E R FO R M IN TH IS O R D E R .
  • Page 14 5-3. REFER TO GENERAL ADJUSTMENT 1. S-CORR +/- ( S-CORRECTION ) P ress this button to adjust the sam e distance betw een horizontal lines on screen of crosshatch pattern. 2. H-CENTER +/- ( HORIZONTAL CENTER ) P ress this button to adjust picture centering w ith H -center on screen of R E TM A pattern. 3.
  • Page 15 11. SCREEN P ress this button to adjust the screen volum e on FB T. 12. AGC +/- P ress this button to adjust M A IN TU N E R A G C . 13. AFT P ress this button to adjust V C O . 14.

  • Page 16: Ic Description

    6. IC DESCRIPTION 6-1. SDA5255 ( Micro controller & Teletext Decoder ) 1. General description The TD A 5255 contains a slicer for V P S and T TX , an accelerating acquisition hardw are m odule, a display generator for "LE V E L1"TTX data and a 8bit u-controller running at 333nsec cycle tim e. The controller w ith dedicated hardw are guarantees flexibility, does m ost of the internal processing of TTX acquisition, transfers data to/from the external m em ory interface and receives/transm its data via IIC and U A R T user interfaces.
  • Page 17 • Synchronization display synchronization to sandcastle or horizontal sync and vertical sync w ith start/stop oscillator or display synchronization to H S /V S w ith external clock independent clock system s for acquisition, display and controller. • Controller - 8bit configuration - 18 internal clock - 0.33...
  • Page 18 4. Pin description NAME SYM BOL DESCRIPTION P3.1 S ECAM -L O UT for sw itching M AINSAW filter L9461 - SEC AM -L' : H - SEC AM -L : L P0.7/O P EN DRAIN S ECAM -L O UT for sw itching S UB SAW filter L9461 - SEC AM -L' : H - SEC AM -L : L P0.6/O P EN DRAIN...
  • Page 19 NAME SYM BOL DESCRIPTION VCCA VCCA A nalog Supply for Slicer IREF IREF R eference current for slicer PLLs CVBS CVBS C VBS INPUT P2.3/8bit ADC AFT2 A FT INPUT for SU B TUNER P2.3/8bit ADC AG C A G C INPUT for ATS SO RTING P2.3/8bit ADC KEY1 K EY M ATRIX INPUT...
  • Page 20 6-2. CAT24C08P (EEPROM) 1. Typical feature IIC B U S com patible Low pow er C M O S technology 16B yte page w rite buffer S elf tim ed w rite cycle w ith auto clear 100,000 program /erase cycles 100 year data retention O ptional high endurance device available 2.
  • Page 21 6-3. TDA8374A( Single chip TV Processor for Negative modulation IF ) 1. General Description The TD A 8374A is IIC B U S controlled single chip TV processors w hich are intended to be applied in PA L/N T S C television receiver. TD A 8374N 3 : W ith positive and negative m odulation A pplied in PA L/S E C A M /N TS C TV.
  • Page 22 3. Block Diagram...
  • Page 23 4. Pin Description NAME DESCRIPTION SO UN D IF INPU T SIF INPUT EXT AUDIO INPU T EXTERNAL AUDIO INPUT VCO REF FILTER The IF V CO tuned circuit is applied to these pin. Its resonance frequency m ust be two tim es the if-frequency and in between a range of 64-120M hz.
  • Page 24 NAME DESCRIPTION A Voltage detection circuit is connected to both pins. - pin12 if V12 < 6.8V than a power on reset, PO R . is generated. The Hout output is disabled im m ediate. - pin37 if V37 < 5.8V than the horizontal output is disabled im m ediate. INT CVBS INPUT EXT It is recom m ended that the C VBS1 int and CVBS2 ext input am plitudes CVBS INPUT...
  • Page 25 NAME DESCRIPTION R-Y O UTPU T The m axim um output im pedance of pins 29,and 30 is 500 when B-Y O UTPUT PAL/NTSC signals are identified. W hen SEC AM is identified by the SECAM add-on and no PAL/NTSC is already identified by the ASM , then the ASM sets the -(R-Y)/-(B-Y ) output switch open (via DEM SW ).
  • Page 26 NAME DESCRIPTION PHI-1 FILTER The loop filter connected to pin 43 is suitable for various signal conditions as strong/w eak and VCR signal. This is achieved by switching of the loopfilter tim e constant by changing the PHI-1 output current. Via IIC bus FO A/B,different tim e constants can be chosen,including an autom atic m ode which gives optim al perform ance under varing conditions.
  • Page 27 6-4. TDA4665 ( BASEBAND DELAY LINE ) 1. Feature Tw o com b.filters,using the sw itched-capacitor technique, for one line delay tim e. A djustm ent free application. N o crosstalk betw een S E C A M colour carriers. H andles negative or positive colour-difference input signals.
  • Page 28 6-5. TDA8395 ( SECAM DECODER ) 1. Feature Fully integrated filters. A lignm ent free. For use w ith baseband delay. 2. Description The TD A 8395 is a self-calibrating, fully integrated S E C A M decoder.The IC should preferably be used in conjunction w ith the PA L/N TS C decoder TD A 8362 and w ith the sw itch capacitor baseband delay circuit T D A 4665.
  • Page 29 6-6. TDA6106Q ( VIDEO OUTPUT AMPLIFIER ) 1. Feature B lack-current m easurem ent output for autom atic black current stabilization (A B S ) S ingle supply voltage of 200V Internal protection against positive appearing C R T flash-over discharge P rotection against E S D Internal 2.5V reference circuit C ontrollable sw itch-off behavior...
  • Page 30 6-7. TDA8356 ( DC-coupled vertical deflection circuit ) 1. Feature H igh efficient fully D C -coupled vertical output bridge circuit. Vertical fly-back sw itch G uard circuit P rotection against : 0short circuit of the output pins (7 and 4) Tem perature (therm al) protection H igh E M C im m unity because of com m on m ode inputs 2.
  • Page 31 6-8. TDA7056 ( 3W MONO BTL AUDIO PUTPUT AMPLIFIER ) 1. Feature N o sw itch-on/off clicks G ood overall stability S hort circuit proof 2. Description The TD A 7056 is a m ono output am plifier contained in a 9 pin m edium pow er package. The device is designed for battery fed portable m ono recorders,radios and television.
  • Page 32 6-9. STR-S5707 ( Hybrid IC for a Switching Regulator ) 1. Feature S m all S IP isolated package : R esin sealed type (transfer m old) Lo pow er discipation at a lighter load M any protection function function : - P ulse-by-pulse over current protection - O ver-voltage protection w ith a latch - Therm al protection w ith a latch These protection functions are incorporated and can be latched w ith an external signal.
  • Page 33 Electrical Characteristics of Control Part (Ta=25°C) Description Term inal Sym bol Rating Unit M IN O n-state voltage Vin(on) O ff-state voltage Vin(off) O perating circuit current Iin(on) Stand-by circuit current Iin(off) O n-tim e O ff-tim e Toff O CP term inal Threshold voltage Vocp -1.12 -0.88...
  • Page 34 6-10. TOP-210 ( Three-terminal off-line PWM Switch ) 1. Feature The TO P 210 is intended for 100/110/230 VA C off-line pow er supply applications in the 0 to 8W ( 0 to 5W universal ) range. C ontrolled M O S FE T turn-on. Integrated P W M C controller and 700V M O S F E T in industry standard eight pin D IP package.
  • Page 35 6-11. LA71511MQ ( QIP-80E ) : A/V 1-CHIP A pplication : PA L V H S V TR audio and video signal P rocessor 1. Feature A pplicable to m ulti system : PA L-G B I, M E S E C A M ,4.43N TS C ,N A P -G B I B uilt-in N A P circuit to convert N T S C to PA L N orm al audio signal processing circuit (self-alignm ent for record bias) B uilt-in S E C A M discrim ination circuit (M E S E C A M )

  • Page 36: Pin Description

    2. PIN DESCRIPTION PIN NO . PIN N AM E S TA ND AR D D C VO LT PIN N O . P IN N AM E S TA ND AR D DC VO LT A.R E C .O U T 2.3V Y C C D D R IVE A-G N D...
  • Page 37 6-12. LA70001 ( HEAD AMP IC ) 1. Feature A G C circuit is built-in this IC ( no record current adjustm ent is required ) P layback envelope detector circuit is built-in this IC for the purpose of auto-tracking. O perating supply voltage : 4.8V - 5.5V 2.
  • Page 38 6-13. LC89977M ( CCD DELAY LINE IC ) 1. Feature B uilt-in com b filter function for colour noise reduction B uilt-in 1H delay line for lum inance signal 3fsc (13.3M H z) clock is generated by P LL circuit and is synchronized w ith fsc(4.43M H z) clock input. C om b filter for chrom inance noise reduction A vailable system : PA L,G B I,4.43N TS C The output phase of lum inance signal is the sam e phase of input signal...
  • Page 39 SYSCON PORT ( IN01 ) NAME PORT ASSIGNMENT ACTIVE KEY0 PATH ADJ. P77/AN7 USE FOR PATH ADJUST. PATH JIG P.G DELAY DRUM SEL. P75/AN5 A/D INPUT RN08 PAL 2HD(SP) 57/75 1.85~2.5 6.2K PAL 2HD(S/LP) 40/40 40/40 1.25~1.85 4.3K SECAM 2HD(LP) 40/40 40/40 1.25~1.85...
  • Page 40 NAME PORT ASSIGNMENT ACTIVE SYNC DET (L) PB (L) TAPE DOWN L TAPE INSERTED : L CAM D CAM DATA INPUT DECK CAM C * MODE SWITCHING TABLE (CAM) CAM B CA M A CAM B CAM C CAM D MODE CAM A EJECT...
  • Page 41 NAME PORT ASSIGNMENT ACTIVE SECAM CON H SECAM CONTROL : SECAM : "H" SECAM IC MESECAM H HEAD SEL. HEAD SELECTION 2HD : L 4HD : H RESET H RESET PULSE OUT TIMER P107/Sout1 P106/Sin1 P105/Sclk1 SYS D. OUT P104/Sout0 SYSCON SERIAL DATA OUTPUT PULSE TIMEER...

  • Page 42: Circuit Description

    7. CIRCUIT DESCRIPTION 7-1. VISION IF amplifier,afc,video demodulator The IF signal from the tuner is fed through a S AW filter to the differential IF input (pin 48 and 49). The first IF stage consists of 3A C -coupled am plifiers w ith a total gain control range of over 66dB . The reference carrier for the video dem odulator is obtained by a P LL carrier regenerator(elim inating notch filter com prom ises,as in reference tuned circuits for passive carrier regeneration).

  • Page 43: Colour Decoder

    The second phase detector -2 locks the phase of the horizontal drive pulses at output pin 40 to the horizontal flyback pulse at input pin 41. This com pensates for the storage tim e of the horizontal deflection transistor. -2 loop filter (C ) is externally connected to pin 42. The horizontal phase can be given a static off set via IIC bus (H S H "horizontal shift).
  • Page 44 The killer circuit sw itches off the R -Y and B -Y dem odulators at very low input signal conditions (chrom a burst am plitude). A hysteresis prevents on/off sw itching at low,noisy signals. Colour standard pin34 pin35 PAL4.43/SECAM +NTSC4.43 none 4.43 PAL4.43/SECAM +NTSC-M...
  • Page 45 D uring the m easuring lines R G B out w ill supply 4V pulses to the video output stages. The TD A 8374 w aits until the black current feedback input (pin18) exceeds 200 , w hich indicates that the picture tube w arm -up.
  • Page 46 7-10. Base band delay line TDA4665 TD A 4665 is an integrated double baseband delay line of 64 It couples to the TD A 8374 and TD A 8395 w ithout any sw itches or alignm ents. The TD A 4665 consist of tw o m ain blocks : - Tw o delay lines of 64 in sw itched capacitor technique - Internal clock generation of 3M H z, line locked to the sandcastle pulse.
  • Page 47 7-12. Horizontal deflection The circuit contains H drive, line output transform er. The H drive pulses from the TD A 8374 are am plified in the horizontal drive circuit, to get sufficient base drive current for the high voltage sw itching transistor Q 402. D uring the horizontal scan period (=52 ) Q 402 w ill conduct, and a saw tooth current flow s from +123V through the prim ary w inding of the FB T to ground.
  • Page 48 7-14. Power supply STR-S5707 1. V in term inal, start-up circuit A start-up circuit is to start and stop a operation of a control IC by detecting a voltage appearing at a Vin terminal (pin 9). A t start up of a pow er supply, w hen a voltage at the V in term inal reaches to 8V (typical) by charging up C 817 by the function of a start-up resistor, R 804, a control circuit starts operating by the function of the start-up circuit.
  • Page 49 the pow er supply circuit sustains the off state as long as current of 500 m inim um flow s to V in term inal from a start up resistor. In order to prevent a m alfunction to be caused by a noise and so on, delay tim e is provided by C 1 incorporated in the IC and, therefore, the latch circuit operates w hen the O V P or TS D circuit is in operation, or an external signal input is provided for about 10 or longer.

  • Page 50: Voltage Charts

    8. VOLTAGE CHARTS 1. TDA9800 ( I201 ) : B/G. TDA9802 ( I201 ) : SECAM-L PIN NO . VO LT. P IN NO . VO LT PIN NO . VOLT. P IN N O. VO LT. 3.33 2.60 3.33 2.60 3.33 3.24...
  • Page 51 6. 24C08P ( I703 ) 7. BA6209 ( IN03 ) 5. TDA7056 ( I601 ) PIN NO . R EC PIN N O . VO LT. PIN N O. VO LT. 13.8 0.84 0.84 5.26 12.3 12.5 12.3 12.5 0.86 0.86 8.
  • Page 52 11. LA71511MQ RE C RE C RE C RE C 2.44 2.40 0.35 0.39 0.06 2.05 2.02 0.01 0.00 1.56 2.25 2.00 1.97 0.21 0.26 2.44 2.41 0.02 1.80 0.48 0.47 4.48 4.48 1.03 0.05 2.41 1.82 1.83 1.84 4.75 4.75 1.35 5.51...

  • Page 56: Trouble Shooting Charts

    10. TROUBLE SHOOTING CHARTS 10-1. NO RASTER CHECK MAIN B+ ( 123V LINE ) I806 6Vout ? CHECK HEAT VOLTAGE, Q803 BASE = H ? 16.5V, 45V, 190V LINE SW08,P803 SOLDER ? CHECK H DRIVE PULSE TOP210 PIN VOLT ? AT PIN3 OF PA406 PA805 VCR H = H ? D825~D828,F801,R803 ?
  • Page 57 10-3. NO PICTURE(RASTER OK) CHECK VIDEO SIGNAL AT PIN6 OF I501 (TDA8374) CHECK DATA,CLOCK AT CHECK VIDEO SIGNAL AT PIN7,8 OF I501 ( TDA8374 ) PIN13 OF I501 ( TDA8374 ). CHECK SIGNAL AT PIN48, CHECK I701 AND ADJACE- CHECK QC504, CHECK R-Y, B-Y 49 OF I501 ( TDA8374 ) NT PATTERN.
  • Page 58 10-5. NO SOUND CHECK AUDIO SIGNAL AT PIN 15 OF I501 (TDA8374) CHECK VOLUME CONTROL CHECK VOLTAGE AT PIN VOLTAGE ? 2,3 OF I601 CHECK SIGNAL AT PIN 1 OF I501 I701 20 PIN = H ? SPEAKER ? CHECK QC505,Z501,Z502 IN01 56 PIN = H ? SPEAKER CONNECTOR ? CHECK QCY17,QC601 AND...
  • Page 59 10-7. SERVO-SYSCON CIRCUIT PLAYBACK PICTURE ADJUST TRACKING IS NOT GOOD. NOISE APPEARS ALTHOUGH NOISE APPEARS ALTHOUGH CHECK AND RE-ADJUST ADJUSTING TRACKING. CHANGE CASSETTE TAPE. THE PATH OF DECK. IS CTL PULSE OUTPUT AT CTL HEAD HEIGHT IS ADJUST THE HEAD HEIGHT P1N 92 OF IN01.
  • Page 60 AUTO-STOP DURING PLAYBACK. IS REEL PULSE APPLIED TO CHECK REEL SENSOR. PIN 81 AND 82 OF IN01 ? IS DRUM F.G APPLIED TO CHECK CONNECTOR AND PIN 87 OF IN01 ? DRUM F.G CIRCUITS. CHECK IN01. DRUM MOTOR LOADING STOP. IS MOTOR 12V SUPPLIED CHECK POWER IN03 7,8 PIN 12V ?
  • Page 61 CAPSTAN MOTOR LOADING STOP. IS MOTOR VCC SUPPLIED ? CHECK POWER MODULE. IS THE INPUT OF PIN 6 OF CHECK CIRCUIT OF RN12, PN03 2.5V ~ 3.5V ? RN33, RN44 IS PIN 4 OF PN03 2.5V ? CHECK RCN31, RCN32 DOES PIN 77 OF IN01 CHECK IN01, RCN10, RCN11 SUPPLY CAPSTAN PWM.
  • Page 62 CASSETTE IS NOT INSERTE IS MOTOR VCC SUPPLIED ? CHECK POWER MODULE ? ( AT PIN 7 OF PA805 ) CAM DATA IS CHANGED CHECK CONNECTOR WHEN CST IN ? CHECK DECK PART. IS 5V APPLIED TO PIN 5 OF IS 5V SUPPLIED AT IN03 WHEN CST IN ? PIN 45 OF IN01 ?
  • Page 63 B. TROUBLE SHOOTING OF REC MODE. NO SOUND IN THE PLAYBACK MODE AFTER RECORDING IS SIGNAL INPUT INTO CHECK A/V SELECT PIN 71,73 OF IY01. CIRCUIT. IS 5V APPLIED TO PIN 76 OF IY01 AND IS ABOUT 5.7V CHECK SYSCON. APPLIED TO PIN 2 OF TY01 IS THE VOLTAGE ABOVE 4V IS CLOCK AND DATA APPL-...
  • Page 64 10-9. VCR VIDEO CIRCUIT A. TROUBLE SHOOTING OF PREAMP IN THE PLAYBACK MODE. IY04 : LA70001 IS THE SIGNAL FROM HEADS CHECK DRUM AND FED TO PIN1 AND PIN3 (LP MODE) DECK MECHANISM. OR PIN 5 AND PIN 7 (SP MODE) OF PAY01.
  • Page 65 B. TROUBLE SHOOTING OF PREAMP IN THE RECORD MODE. IY04 : LA70001 IS THE Y-FM SIGNAL FROM PIN CHECK RY48, CCY05 18 OF IY01 FED TO PIN9 OF IY04 ? AND PCB PATTERN. IS THE DOWN CONVERTED COLOUR CHECK CCY04 AND SIGNAL FROM PIN 14 OF IY01 FED PCB PATTERN.
  • Page 66 C. TROUBLE SHOOTING OF LUMINANCE SIGNAL IN THE RECORD MODE. IS THE VIDEO SIGNAL FROM PIN CHECK PCB PATTERN 24 OF IY01 ? AND ADJACENT CIRCUIT. IS ON/OFF 5V SUPPLIED TO PIN 36 CHECK ON/OFF 5V AND PIN 47 OF IY01 AT 5 VOLTS ? IS THE LUMINANCE SIGNAL FROM CHECK QCY03, RCY02, PIN 25 OF IY01 FED TO PIN 26 OF...
  • Page 67 D.TROUBLE SHOOTING OF PAL COLOUR IN THE RECORD MODE. IS THE VIDEO SIGNAL FROM PIN CHECK PCB PATTERN AND 35 OF IY01 ? ADJACENT CIRCUIT. IS ON/OFF 5V SUPPLIED TO PIN 36 CHECK ON/OFF 5V AND PIN 47 OF IY01 AT 5 VOLTS ? IS THE DOWN-CONVERTED COLOUR SIGNAL OBTAINED FROM PIN 14 OF CHECK IY01.
  • Page 68 F. TROUBLE SHOOTING OF LUMINANCE IN THE PLAYBACK MODE. IS Y-FM SIGNAL FROM PIN 7 OF CHECK PREAMP CIRCUIT IY04 FED TO PIN 15 OF IY01 ? IS ON/OFF 5V SUPPLIED TO PIN 36 CHECK ON/OFF 5V AND PIN 47 OF IY01 AT 5 VOLTS ? IS THE LUMINANCE SIGNAL FROM CHECK QCY07, LY08, LY06, PIN 15 OF IY01 FED TO PIN 25 OF...
  • Page 69 G. TROUBLE SHOOTING OF PAL COLOUR IN THE PLAYBACK MODE. IS THE SIGNAL FROM PIN 7 OF CHECK PREAMP CIRCUIT IY04 FED TO PIN 15 OF IY01 ? IS THE PAL COLOUR SIGNAL FROM PIN 7 OF IY04 FED TO PIN 15 OF CHECK AMP CIRCUIT IY01 THROUGH AMP CIRCUIT ? THE AMP CIRCUIT CONSIST OF...
  • Page 70 H. TROUBLE SHOOTING OF SECAM COLOUR IN THE PLAYBACK MODE. IS THE SIGNAL FROM PIN 7 OF CHECK PREAMP CIRCUIT IY04 FED TO PIN 15 OF IY01 ? IS THE SIGNAL FROM PIN 7 OF CHECK PB AMP CIRCUIT IY04 FED TO PIN 21 OF IY01 THROUGH AND IY03 PB AMP AND 1.1MHz BPF ? THE AMP CIRCUIT CONSIST OF...

  • Page 71: Electrical Parts List

    11. ELECTRICAL PARTS LIST C O M P O N E N T S M A R K E D W IT H T H IS S Y M B O L M U S T O N LY B E R E P LA C E D B Y A W ARN ING C O M P O N E N T H AV IN G ID E N T IC A L P H Y S IC A L C H A R A C TE R IS T IC S .
  • Page 72 LO C PART C ODE PART N AME PART TYPE REMARK V901 48A96414P1 C RT BA RE A34JLL90X ZZ200 PTFM SJA 531 M ASK FRO NT AS DVT-14F6LA M 201 4852064301 M ASK FRO NT HIPS BK ZZ202 PTS PPWA531 S PEAKER AS DVT-14F6LA PA601...
  • Page 73 LO C PART C ODE PART N AME PART TYPE REMARK JS01 4859200401 S O CKET RG B SR-21A1 (AN G LE TYPE) L101 58C9780027 C O IL CHO KE TRF-1201B (0.97 UH) L102 58E0000S37 C O IL AFT TRF-A001 L103 58C9780027 C O IL CHO KE...
  • Page 74 LO C PART C ODE PART N AME PART TYPE REMARK SF03 5PG 1966M -- FILTER SAW G 1966M SF04 5PL9461M -- FILTER SAW L 9461-M SN01 1SG 239S--- IC S ENSO R SG -239S SN02 1SG 239S--- IC S ENSO R SG -239S SN03 TST5811---...
  • Page 75 LO C PART C ODE PART N AME PART TYPE REMARK CC202 HCBK223KCA C CHIP CERA 50V X7R 0.022M F K 2012 CC203 HCQ K220JCA C CHIP CERA 50V C H 22PF J 2012 CC204 HCQ K220JCA C CHIP CERA 50V C H 22PF J 2012 CC205 HCQ K820JCA...
  • Page 76 LO C PART C ODE PART N AME PART TYPE REMARK CC519 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 CC520 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 CC521 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 CC522 HCBK102KCA C CHIP CERA...
  • Page 77 LO C PART C ODE PART N AME PART TYPE REMARK CC603 HCFK103ZCA C CHIP CERA 50V Y5V 0.01M F Z 2012 CC604 HCFK103ZCA C CHIP CERA 50V Y5V 0.01M F Z 2012 CC605 HCQ K101JCA C CHIP CERA 50V C H 100PF J 2012 CC606 HCQ K101JCA C CHIP CERA...
  • Page 78 LO C PART C ODE PART N AME PART TYPE REMARK CCL14 HCBK473KCA C CHIP CERA 50V X7R 0.047M F K 2012 CCL15 HCFK103ZCA C CHIP CERA 50V Y5V 0.01M F Z 2012 CCL16 HCQ K820JCA C CHIP CERA 50V C H 82PF J 2012 CCL17 HCFK103ZCA C CHIP CERA...
  • Page 79 LO C PART C ODE PART N AME PART TYPE REMARK CCN60 HCQ K100DCA C CHIP CERA 50V C H 10PF D 2012 CCQ 01 HCFK103ZCA C CHIP CERA 50V Y5V 0.01M F Z 2012 CCY01 HCFK103ZCA C CHIP CERA 50V Y5V 0.01M F Z 2012 CCY02 HCFK103ZCA...
  • Page 80 LO C PART C ODE PART N AME PART TYPE REMARK CCY43 HCFK104ZCA C CHIP CERA 50V Y5V 0.1M F Z 2012 CCY44 HCFK103ZCA C CHIP CERA 50V Y5V 0.01M F Z 2012 CCY46 HCQ K201JCA C CHIP CERA 50V C H 200PF J 2012 CCY47 HCBK333KCA C CHIP CERA...
  • Page 81 LO C PART C ODE PART N AME PART TYPE REMARK Q C102 T2SA812T2B TR CHIP 2SA812-T2B Q C103 TKTC3881-B TR CHIP KTC3881 Q C201 TKTC3881-B TR CHIP KTC3881 Q C202 T2SC1623T2 TR CHIP 2SC1623-L6/T2B Q C203 T2SC1623T2 TR CHIP 2SC1623-L6/T2B Q C204 T2SC1623T2...
  • Page 82 LO C PART C ODE PART N AME PART TYPE REMARK Q CY09 T2SA812T2B TR CHIP 2SA812-T2B Q CY10 T2SC1623T2 TR CHIP 2SC1623-L6/T2B Q CY11 T2SC1623T2 TR CHIP 2SC1623-L6/T2B Q CY12 T2SC1623T2 TR CHIP 2SC1623-L6/T2B Q CY13 T2SA812T2B TR CHIP 2SA812-T2B Q CY14 T2SC1623T2...
  • Page 83 LO C PART C ODE PART N AME PART TYPE REMARK RC226 HRFT752JCA R CHIP 1/10 7.5K O HM J 2012 RC228 HRFT223JCA R CHIP 1/10 22K O HM J 2012 RC229 HRFT331JCA R CHIP 1/10 330 O HM J 2012 RC230 HRFT152JCA R CHIP...
  • Page 84 LO C PART C ODE PART N AME PART TYPE REMARK RC542 HRFT103JCA R CHIP 1/10 10K O HM J 2012 RC543 HRFT513JCA R CHIP 1/10 51K O HM J 2012 RC544 HRFT103JCA R CHIP 1/10 10K O HM J 2012 RC545 HRFT153JCA R CHIP...
  • Page 85 LO C PART C ODE PART N AME PART TYPE REMARK RC718 HRFT101JCA R CHIP 1/10 100 O HM J 2012 RC719 HRFT101JCA R CHIP 1/10 100 O HM J 2012 RC722 HRFT102JCA R CHIP 1/10 1K O HM J 2012 RC723 HRFT122JCA R CHIP...
  • Page 86 LO C PART C ODE PART N AME PART TYPE REMARK RCJ20 HRFT000-CA R CHIP 1/10 0 O HM 2012 RCJ21 HRFT000-CA R CHIP 1/10 0 O HM 2012 RCJ22 HRFT000-CA R CHIP 1/10 0 O HM 2012 RCJ23 HRFT000-CA R CHIP 1/10 0 O HM 2012 RCJ24...
  • Page 87 LO C PART C ODE PART N AME PART TYPE REMARK RCN20 HRFT103JCA R CHIP 1/10 10K O HM J 2012 RCN23 HRFT154JCA R CHIP 1/10 150K O HM J 2012 RCN24 HRFT154JCA R CHIP 1/10 150K O HM J 2012 RCN27 HRFT105JCA R CHIP...
  • Page 88 LO C PART C ODE PART N AME PART TYPE REMARK RCY23 HRFT132JCA R CHIP 1/10 1.3K O HM J 2012 RCY24 HRFT124JCA R CHIP 1/10 120K O HM J 2012 RCY25 HRFT392JCA R CHIP 1/10 3.9K O HM J 2012 RCY26 HRFT223JCA R CHIP...
  • Page 89 LO C PART C ODE PART N AME PART TYPE REMARK RCY75 HRFT154JCA R CHIP 1/10 150K O HM J 2012 RCY77 HRFT223JCA R CHIP 1/10 22K O HM J 2012 RCY78 HRFT273JCA R CHIP 1/10 27K O HM J 2012 RCY79 HRFT104JCA R CHIP...
  • Page 90 LO C PART C ODE PART N AME PART TYPE REMARK C558 CEXF1E470V C ELECTRO 25V R SS 47M F (5X11) TP C559 CEXF1E470V C ELECTRO 25V R SS 47M F (5X11) TP C560 CEXF1E470V C ELECTRO 25V R SS 47M F (5X11) TP C562 CEXF1E470V C ELECTRO...
  • Page 91 LO C PART C ODE PART N AME PART TYPE REMARK CY61 CEXF1H109A C ELECTRO 50V R SM 1M F (4X7) TP CY72 CEXF1C470A C ELECTRO 16V R SM 47M F (5X7) TP CY73 CEXF1C470A C ELECTRO 16V R SM 47M F (5X7) TP CY78 CEXF1C220A C ELECTRO...
  • Page 92 LO C PART C ODE PART N AME PART TYPE REMARK CL13 CCZF1E103Z C CERA 25V F 0.01M F Z (AXIAL) CN01 CCZF1E103Z C CERA 25V F 0.01M F Z (AXIAL) CN03 CCZF1E103Z C CERA 25V F 0.01M F Z (AXIAL) CN04 CCZF1E103Z C CERA...
  • Page 93 LO C PART C ODE PART N AME PART TYPE REMARK D513 DUZ6R2BM -- D IO DE ZENER UZ-6.2BM 6.2V D514 DUZ6R2BM -- D IO DE ZENER UZ-6.2BM 6.2V D515 DUZ6R2BM -- D IO DE ZENER UZ-6.2BM 6.2V D516 DUZ6R2BM -- D IO DE ZENER UZ-6.2BM 6.2V D517...
  • Page 94 LO C PART C ODE PART N AME PART TYPE REMARK L506 5CPZ569K02 C O IL PEAKING 5.6UH K (AXIAL 3.5M M ) L601 5CPZ100K04 C O IL PEAKING 10UH 10.5M M K (LA L04TB) L602 5M C0000100 C O IL BEAD BI-3857 L603 5M C0000100...
  • Page 95 LO C PART C ODE PART N AME PART TYPE REMARK R563 RD-AZ473J- R CARBO N FILM 1/6 47K O HM J R572 RD-AZ822J- R CARBO N FILM 1/6 8.2K O HM J R573 RD-AZ103J- R CARBO N FILM 1/6 10K O HM J R576 RD-AZ122J- R CARBO N FILM...
  • Page 96 LO C PART C ODE PART N AME PART TYPE REMARK RN43 RD-AZ332J- R CARBO N FILM 1/6 3.3K O HM J RN44 RD-AZ332J- R CARBO N FILM 1/6 3.3K O HM J RN46 RD-AZ102J- R CARBO N FILM 1/6 1K O HM J RN47 RD-AZ102J- R CARBO N FILM...
  • Page 97 LO C PART C ODE PART N AME PART TYPE REMARK D815 DBYW 95C--- D IO DE BYW 95C (TAPPING ) D819 1UPC574J-- UPC574J F801 5FSCB4022R FU SE CERA SEM KO F4AH 4A 250V M F51 I301 PTA2SW 4617 H EAT SINK ASS`Y 1TDA8356-- + 7174301011 I301 1TDA8356--...
  • Page 98 LO C PART C ODE PART N AME PART TYPE REMARK SCT01 4859303030 S O CKET CRT ISM M 03S T401 50D0000022 TR ANS DRIVE HD-15D T402 50H0000177 HST1142.5057 T801 50M 4042A2J TR ANS SM PS TSM -4042A2 T802 50M ST22A3J TR ANS SM PS ST-22A3 ZZ200...
  • Page 99 LO C PART C ODE PART N AME PART TYPE REMARK R401 RS02Z912JS R M -O XID E FILM 2W 9.1K O HM J SM ALL R402 RS02Z912JS R M -O XID E FILM 2W 9.1K O HM J SM ALL R403 RS02Z912JS R M -O XID E FILM...
  • Page 100 LO C PART C ODE PART N AME PART TYPE REMARK C909 CCXB1H561K C CERA 50V B 560PF K (TAPPING ) C910 CCXF1H473Z C CERA 50V F 0.047M F Z (TAP PING ) F801A 4857415001 C LIP FUSE PFC5000-0702 F801B 4857415001 C LIP FUSE PFC5000-0702...
  • Page 101 LO C PART C ODE PART N AME PART TYPE REMARK D824 DR2KY----- D IO DE AVALANC HE R 2-KY (TAPPING ) D825 D1S1888--- D IO DE 1S1888 (TAPPING ) D826 D1S1888--- D IO DE 1S1888 (TAPPING ) D827 D1S1888--- D IO DE 1S1888 (TAPPING ) D828...
  • Page 102 LO C PART C ODE PART N AME PART TYPE REMARK R813 RD-2Z224J- R CARBO N FILM 1/2 220K O HM J R815 RC-2Z565J- R CARBO N CO M P 1/2 5.6M O HM J R819 RD-2Z104J- R CARBO N FILM 1/2 100K O HM J R831 RD-4Z270J-...

  • Page 103: The Different Parts For Size

    12. THE DIFFERENT PARTS FOR SIZE DVT-14F6PA DVT-20F6PA LOC. PART NAM E PART CODE PART TYPE ZZ131 CRT G RO UND AS 48519A4610 1401H-1015-1P 48519A5010 2001H-1015-1P M 201 M ASK FRO NT 4852062601 HIPS BK 4852064301 HIPS BK M 211 CO VER BACK 4852149321 HIPS BK...
  • Page 104 DVT-14F6PA DVT-20F6PA LOC. PART NAM E PART CODE PART TYPE ZZ200 PCB C HIP M O UNT AS PTM PJ2A570 DVT-14F6PA PTM PJ2C992 DVT-20F6PA ZZ200 PCB M AIN AXIAL AS PTM PJAA5 DVT-14F6PA PTM PJAC992 DVT-20F6PA ZZ200 PCB M AIN M -10 AS PTM PJBA570 DVT-14F6PA PTM PJBC992...

  • Page 105: The Diferent Parts For System

    LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) PW C 1 CORD POWER AS KKP560+BL102NG+T CW 4232 H 03VVH2- CW 4232 H 03VVH2- CW 4232 H03VVH 2- CW 3222/240V 5A+ CW 4232 H03V VH2- C107...
  • Page 106 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) CCL04 C CHIP CERA 50V Y5V 0.01M F CCL05...
  • Page 107 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) CL23 C ELECTRO 16V R SM 47M F D101...
  • Page 108 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) J063 W IRE CO PPER AW G 22 1/0.65 TI AW G 22 1/0.65 TI...
  • Page 109 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) Q C511 TR CHIP 2SA812-T2B 2SA812-T2B...
  • Page 110 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) RC216 R CHIP 1/10 68K O HM J RC217...
  • Page 111 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) RCJ31 R CHIP 1/10 0 O HM 2012 1/10 0 O HM 2012...
  • Page 112 LOC. PART PAL B/G P/S-B/G, D/K P/S-B/G, D/K PAL B/G PAL I P/S-B/G [HA] [DA] [DA] [FA] [PA] [LA] (W ITHO UT SC ART) (W ITHOUT SCART (W ITH SCART) (W ITH SCART) (W ITH SCART) (W ITH SCART) SF01 FILTER SAW G 1966M K2950M...
  • Page 113 MV-1421 / MV-1422 MATERIAL REMARKS PART CODE PART NAME Q'ty T2S WAS3X12MFZN BK 30+52 7128301212 SCREW TAPPING 4857018900 PLT HT SINK IC 4857913304 RUBBER SPONGE 13.5X11X30 NYLON 66 BLK 5280N 97P4602700 CLAMP CORD 4855415800 SPEC PLATE 150ART P/E FILM T2S TRS 4X16MFZN BK SCREW TAPPING 7122401612 4857817610...
  • Page 114 MV-4822 35 37 39 41 PART CODE PART NAME Q'ty MATERIAL REMARKS 7122401612 SCREW TAPPING T2S TRS 4X16 MFZN BK 44+FBT 97P4602700 CLAMP CORD NYLON 66 BLK 5280N 4855415800 SPEC PLATE 150ART P/E FILM 7122401612 SCREW TAPPING T2S TRS 4X16 MFZN BK 1+44 4857817610 CLOTH BLACK...
  • Page 115 Service Manual (Revision-1) Television-VCR Combo CHASSIS : CP-420 ADDED MODEL: DVT-14F7 LA/PA/FA DVT-14F9 LA/PA/FA DVT-20F7 LA/PA/FA DVT-20F9 LA/PA/FA DVT-21F1 LA/PA/FA DVT-21F2 LA/PA/FA Subject : Tuner change & New model Please file and use this Revision-1 for the CP-420 chassis with the basic service manual.
  • Page 116 Distinguishing method between New Tuner and Old one If this frame is gray color (old : black), then the New Tuner (S/N:4859719730) is used. CAUTION 2 Tuners (Old:4859717030, New:4859719730) are not interchangable. Each tuner should be replaced with the same one. But Main PCB Assy ( Old &...
  • Page 117 Main PCB Assy Circuit Diagram SECTION BEFORE AFTER MAIN TUNER...
  • Page 118 SECTION BEFORE AFTER TUNER...
  • Page 119 CP-420 Different Parts List for Tuner Change * CAUTION : 2 TUNERS(4859717030 & 4859719730) ARE NOT INTERCHANGABLE! 99-04-09 JAPAN ALPS 9V TUNER(BEFORE) DECC 5V TUNER(AFTER) PART NAME REMARK PART DESC. PART DESC. A001 PCB MAIN 4859801593 330X246 D1B 4859802993 330X246 D1B PCB VERSION CHANGE U101 TUNER VARACT...
  • Page 120 JAPAN ALPS 9V TUNER(BEFORE) DECC 5V TUNER(AFTER) PART NAME REMARK PART DESC. PART DESC. CCY96 C CHIP CERA HCBK103KCA 50V X7R 0.01MF K 20 A/V ONE CHIP(IY01) AREA CCY97 C CHIP CERA HCBK103KCA 50V X7R 0.01MF K 20 A/V ONE CHIP(IY01) AREA CX10 C CERA CCZB1H221K...
  • Page 121 JAPAN ALPS 9V TUNER(BEFORE) DECC 5V TUNER(AFTER) PART NAME REMARK PART DESC. PART DESC. R242 R CARBON FILM 85801065GY AWG22 1/0.65 TIN COT RD-AZ512J- 1/6 5.1K OHM J SUB TUNER(U102) AREA POWER ASSY VER. IC(I301) R304 R CARBON FILM RD-4Z109J- 1/4 1 OHM J RD-2Z109J- 1/2 1 OHM J...
  • Page 122 CP-420 Different Parts List for Size PART NAME PART CODE PART DESCRITION DVT-14F6LA DVT-20F6LA DVT-21F1LA CMYE2D474J 200V PU 0.47MF J C415 C MYLAR CMYE2D364J 200V PU 0.36MF J CMYE2D514J 200V PU 0.51MF J PTRTPWA531 DVT-14F6LA CRT1 CRT AS PTRTPWC850 DVT-20F6LA 4859625360 A51EAL155X17 58H0000018...
  • Page 123 PART NAME PART CODE PART DESCRITION DVT-14F6LA DVT-20F6LA DVT-21F1LA M621 4856215402 CR T2.0 WASHER RUBBER M622 4856215402 CR T2.0 M781 4857817610 FELT 300X20X0.7 CLOTH BLACK M781 4857817611 FELT 200X20X0.7 4857817611 FELT 200X20X0.7 M782 CLOTH BLACK 4857817612 FELT 250X20X0.7 4857817610 FELT 300X20X0.7 4858035800 "SW-3 DVT-1488,1484"...
  • Page 124 PART NAME PART CODE PART DESCRITION DVT-14F6LA DVT-20F6LA DVT-21F1LA PTACPWA531 DVT-14F6LA ZZ110 ACCESSORY AS PTACPWC850 DVT-20F6LA PTBCSHA570 DVT-14F6PA ZZ120 COVER BACK AS PTBCSHC992 DVT-20F6PA PTBCSHD171 DVT-21F1LA 48519A4610 1401H-1015-1P ZZ131 CRT GROUND NET 48519A5010 2001H-1015-1P 48519A5210 2101H-1015-1P 58G0000084 DC-1450 ZZ132 COIL DEGAUSSING 58G0000086 DC-2050 58G0000074...
  • Page 125 Exploded View ( MV1421 model )
  • Page 126 Exploded View ( MV1422 model)
  • Page 127 Exploded View ( MV4822 model)
  • Page 128 Exploded View ( DVT-20F9 model)
  • Page 129 Exploded View ( DVT-21F1 model)
  • Page 130 Exploded View ( DVT-21F2 model)

This manual is also suitable for:

Mv1422Mv4822

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