Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo TV cp420_sm 21F1

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.




Image preview - the first page of the document
cp420_sm 21F1


>> Download cp420_sm 21F1 documenatation <<

Text preview - extract from the document
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. PRINTED CIRCUIT BOARDS.............................................................................................................. 52

10. TROUBLE SHOOTING CHARTS ...................................................................................................... 54

11. ELECTRICAL PARTS LIST............................................................................................................... 69

12. THE DIFFERENT PARTS FOR SIZE ................................................................................................ 101

13. THE DIFERENT PARTS FOR SYSTEM............................................................................................ 103
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" : 34cm (A34JLL90X)
                    20" : 48cm (A48JLL90X)
                    21" : 51cm (A51EAL55X01)
M AIN VO LTAG E     230V AC 50Hz, 110~250V AC 50Hz(DA M O DEL)
PO W ER             STAND BY M O DE : BELO W 3 Watts
CO NSU M PTIO N     O PERATIO N M O DE : 14" = 68 Watts
                                     20" = 78 Watts
                                     21" = 88 Watts
SO UND O UTPUT      1.5 Watts ( at 60% m od. , 10% THD )
SPEAKER             3 Watts 16 O hm
ANTENNA             75 O hm unbalanced input
IM PEDANCE
TUNING SYSTEM       FS ( FREQ UENCY SYNTHESIS ) TUNING
RECEPTIO N          VH F-L : E2 - S 7
CHANNEL UNIT        VH F-H : S8 - S36
                    U HF : S37 - E69
M EM O RY CHANNEL   70 PRO G RAM S


                                                   )
AUX. TERM INAL      RCA TY PE AV INPU T JACK
                    HEADPHO NE JACK ( 3.5m m
REM O TE            R-35 with 2 "A A" type batteries
CO NTRO LLER
TELETEXT            8page m em ory TO P and FLO F
                     - W est option : G erm an/Deutch/Flem ish,French,Italian,
                            Spanish/Portuguese,Swedish/Finnish/Danish,Czech/Slovak
                     -East option : Polish,Czech/Slovak,Rum anian,Hungarian,Servocroat
                            G erm an/Deutch/Flem ish,French,Italian
                     -Turkish option : Turkish,English,G erm an/Deutch/Flem ish,French,
                            Italian,Spanish/P ortuguese,Swedish/Finnish/Danish
                     -Cyrillic option : Russian,Lettish/Lithuanian,Estonian,Ukranian,
                            Czech/Slovak,Servocroat,English
O THER FEATURE      O N SCREE N DISPLAY,SLEE P TIM ER,O N /O FF TIM ER
                    AU TO TU NING
                    C HILD LO CK
                    TELETEXT
                    PICTURE TYPE SELECTION
                    2-TUNER,TV /AV
W EIG HT            14" : 13.8kg(set)
                    20" : 23.6kg(set)
                    21" : 26.2kg(set)




                                                  1
1-2. VCR PART

 G ENERA L           tem perature                   
                                                    
                                                  5 ~ 35 (operating)
                                                  -20 ~ 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. with E-240 video cassette
                     fullsize cassette
                                                  LP : 480m in. with E-240 video cassette
 AUDIO               recording system             longitudinal track
                     input                        -3.8dBm (500m Vrm s), m ore than 47Kohm s, unbalanced.
                     output                       -3.8dBm (500m Vrm s),less than 1Kohm , unbalanced
                     frequency range              100H z to 8KHz
                     signal to noise ratio        40dB(m ore than)
 VID EO              signal system                PAL/SE CAM colour and CCIR m ono chrom e signals,
                                                  625lines/50fields.
                     recording system             Rotary 2-head herical scan with a slant double azim uth
                                                  com bination video head.
                     input                        1Vp-p, 75 ohm s, unbalanced
                     output                       1Vp-p, 75 ohm s, unbalanced
                     signal to noise ratio        45dB with NETTETE IM AG E control at center position.
                     horizontal resolution        240 lines w ith NETTETE IM AG E control at center position

* D esign and specifications can be subjected to change w ithout notice.

CHANNEL COVERAGE

 SYSTEM          PAL,SECAM -B/G               PAL,SECM -B/G             PAL-I                 O AK-B/H
                 PAL-I/I                      HYPER BAND
                 PAL,SECM -B/G ,DK
                 HYPER BAND

 CHANNEL         VHF ch 2 - 12                VHF ch 2 - 12             UHF ch21 -69          VHF LO W ch 1A- 5
                 UHF ch 21 - 69               UHF ch 21 - 69                                  VHF HIG H ch 5A-N11
                 CATV ch X,Y,Z,S1-S41         CATV ch X,Y,Z,S1-S41                            UHF ch 21 - 69


IN/OUTPUT JACK TYPE

 M O D EL                            EURO PE                           M IDDLE EAS T,ASIA,CIS AUSTRALIA

 JACK TYPE                           SCART TPYE & RCA TYPE             RCA TYPE




                                                             2
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. The nom inal value of the high voltage of this receiver is
   22-23kv(14"), 25-26kv(20", 21") at m ax beam current.
   The high voltage m ust not, under any circum stances, exceed 27.5kv (14", 20"), 29.0kv(21").
   E ach tim e a receiver requires servicing, the high voltage should be checked. It is recom m ended the
   reading of the high voltage recorded as a part of the service records. it is im portant to use an accurate
   and reliable high voltage m eter.
2. The only source of X -R AY R adiation in this TV receiver is the picture tube. For continuous R A D IATIO N
   protection, the replacem ent tube m ust be exactly the sam e type tube as specified in the parts list.

2-2. SAFETY PRECAUTION

1. P otentials of high voltage are present w hen this receiver is operating. O peration of the receiver outside
   the cabinet or w ith the back cover rem oved involves a shock hazard from the receiver.
   1) S ervicing should not be attem pted by anyone w ho is not thoroughly fam iliar w ith the precautions
       necessary w hen w orking on highvoltage equipm ent.
   2) A lw ays discharge the picture tube to avoid the shock hazard before rem oving the anode cap.
   3) D ischarge the high potential of the picture tube before handling the tube. T he picture tube is highly
       evacuated and if broken, glass fragm ents w ill be violently expelled.
2. If any Fuse in this TV receiver is blow n, replace it w ith the FU S E specified in the R eplacem ent P arts List.
3. W hen replacing a high w attage resistor(oxide m etal film resistor) in circuit board, keep the resistor 10m m
   aw ay from circuit board.
4. K eep w ires aw ay from high voltage or high tem perature com ponents.
5. This receiver m ust operate under A C 260 volts, 50H z/60H z.
   (A C 100~250 volts, 50/60H z)N E V E R connect to D C supply or any other pow er or frequency.

2-3. PRODUCT SAFETY NOTICE

M any electrical and m echanical parts in this chassis have special safety-related characteristics.
These characteristics are often passed unnoticed by a visual inspection and the X -R AY R A D IAT IO N protection
afforded by them cannot necessarily be obtained by using replacem ent com ponents rated for higher voltage,
w attage, etc. R eplacem ent parts w hich have these special safety characteristics are identified in this m anual
and its supplem ents, electrical com ponents having such features are identified by designated sym bol on the
parts list. B efore replacing any of these com ponents, read the parts list in this m anual carefully.
The use of substitute replacem ent parts w hich do not have the sam e safety characteristics as specified in the
parts list m ay created X -R AY R adiation.




                                                            3
3. BLOCK DIAGRAM
3-1. Audio Signal Flow




                         4
3-2. Video Signal Flow




                         5
3-3. TV and monitor power switching




                                      6
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 .
  3) P ress the "V C O " K E Y and w ait until the TV screen display "A FT O K "

4-2. SUB 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 2 ( TU N E R IF O U TP U T )
  3) C onnect the D C voltage m eter to T P 3.
  4) A djust L201 ( A FT C O IL ) for 2.2V     0.1V.

4-3. MAIN TUNER AGC

  1) S et a P attern G enerator w ith R F level 60    2 dB uV, 210.25 M H z.
  2) C onnect a O S C ILLO S C O P E P R O B E to P 101 ( TU N E R A G C IN P U T ).
  3) A djust A G C U P /D O W N K E Y the voltage drop about 1.8V D C over below it's m axim um voltage.

4-4. SUB TUNER AGC

  1)                                              
       S et a P attern G enerator w ith R F level 60    2 dB uV, 210.25 M H z.
  2)   C onnect a O S C ILLO S C O P E P R O B E to P 101 ( TU N E R A G C IN P U T ).
  3)   P ress the "S U B A G C " K E Y and m onitoring the S U B TU N E R P IC TU R E .
  4)   A djust R 202 ( S U B A G C V R ) the voltage drop about 1.8V D C over below it's m axim um voltage.

4-5. SCREEN

  1)   A pply a C O LO R B A R PATTE R N S IG N A L.
  2)   P ress the "S C R E E N " K E Y .
  3)   C onnect a O S C ILLO S C O P E P R O B E to P 906 ( C R T C ATH O D E R ,G ,B )
  4)   A djust the screen volum e on FB T such that the highest black level voltage 130    5V dc .



                                                          7
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. FOCUS
  1) A pply a R E TM A PATT E R N S IG N A L.
  2) A djust the FO C U S V O LU M E on FB T to obtain optim al resolution.

4-8. GEOMETRY

1. S-CORRECTION
  1) A pply a C R O S S H ATC H PAT TE R N S IG N A L.
  2) A djust the S -C O R R U P /D O W N K E Y obtain
     the sam e distance betw een horizontal lines.

2. VERTICAL SLOPE
  1) A pply a R E TM A PATT E R N S IG N A L.
  2) P ressing the V -S LO P E +/- K E Y,the
     low er half of the screen is blanked.
  2) A djust the border line of blanked picture
     coincident w ith the center m arks of the
     pattern using the V -S LO P E + /- K E Y.

3. VERTICAL CENTER
  1) A pply a R E TM A PATT E R N S IG N A L.
  2) A djust the center line of pattern coincident
     w ith the m echanical center m arks of the
     C R T using the V -C E N TE R +/- K E Y.

4. VERTICAL SIZE
   The V -C E N TE R adjustm ent has to be
      done in advance.
  1) A pply a R E TM A PATT E R N S IG N A L.
  2) A djust the upperside of the pattern coincident
     w ith the m echanical center m arks of the
     C R T using the V -S IZE +/- K E Y.

5. HORIZONTAL CENTER
  1) A pply a R E TM A PATT E R N S IG N A L.
  2) A djust picture centering w ith H -C E N TE R +/- K E Y.




                                                                8
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
     Test tape : D P -2 (6K H z)


       CONNECTION METHODE

                              PY04                                    OSCILLOSCOPE 1
                                              ADJUST JIG
                                   4
                                                                CH2

                                   6                            CH1




                                                                      OSCILLOSCOPE 2
                              P601

                                   3                            CH1
                                   2
                                   1                            GND




   Adjustm ent Procedure
  1)   C onnect the PATH JIG to P Y 04 after Test tape P LAY B A C K
  2)   P ressing the "ATK O F F" K E Y.
  3)   Insert the D P -2 TA P E . ( A uto playback)
  3)   A djust the w aveform of P B E N V E to m axim um (figure1) using X -position V R .
  4)   A djust IN /O U TP U T G U ID E until the exact w aveform appear as bellow figure2.




                      m ax.
                      (figure 1)                                          (figure 2)


                                                            9
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.
     M ode : P LAY B A C K
     Test tape : D P -2 (6K H z)

   Adjustm ent Procedure
  1) C onnect the m easuring equipm ent to the A U D IO O U TP U T (P 601) term inal.
  2) A fter test tape playback, adjust the output level m axim ally by varing the azim uth screw.
             
     ( 6K -3.8 m +1 m /-3 m )
  3) F ix the azim uth screw w ith locking paint.

 If E E P R O M ( I703 ) has been changed :
  - O ption data has to be changed and
  - all alignm ent function has to be readjusted.

 SECAM-L AFT
1. MAIN TUNER AFT
   1.1 S TA N D A R D S E C A M -L
    1) S et a signal generator w ith
        - R F FR E Q U E N C Y = 34.5 M H z
                                      
        - R F O U T P 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 .
    3) P ress the "V C O -L" K E Y and w ait until the TV screen display "A FT-L O K "

2. SUB TUNER AFT
   2.1 S TA N D A R D S E C A M -L
    1) S elect the P R . of received S E C A M -L
    2) S et a signal generator w ith
        - R F FR E Q U E N C Y = 34.2 M H z
                                      
        - R F O U T P U T LE V E L = 80    5 dB uV
    3) C onnect the signal generator R F output to TP 2 ( TU N E R IF O U TP U T )
    4) C onnect the D C voltage m eter to T P 3.
    5) A djust R 240 ( A FT V R ) for 2.2V      0.1V.




                                                            10
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 .

  1. P U LL O U T T H E P O W E R C O R D .
  2. R E M O V E TH E V C R D E C K M E C H A N IS M .
  3. S U P P LY TH E M A IN P O W E R . (M A IN S W O N )
  4. W A IT FO R A B O U T 10 S E C O N D S . (Y O U C A N S E E T H E LIG H T O F P O W E R LE D IF TH E T V IS N O R M A L)
  5. TU R N O N T H E T V U S IN G TH E R E M O C O N .(Y O U C A N S E E T H E O S D `E M E R G E N C Y ')
  6. C H E C K TH E TV S E C TIO N .

5-2. REMOCON


                                       5th
                                                                     +             +            +
                                       4th                     R           G             B

                                                      +        1     -     2       -     3      -
                                       3rd          S-CORR

                                                       -      4      +     5      +      6 +
                                       2nd                   V-CEN       V-SIZE        V-SLOP

                                                      +        7     -     8      -       9 -
                                       1st           H-CEN   REC         ATK OFF       SUB AGC

                                                       -                   0

                                                      +
                                                     AGC

                                                      -

                                                      AFT


                                                     AFT-L




                                                    SCREEN                         LANGUAGE




To Enter The " SERVICE MODE "
Press blue, yellow, green, red power buttons in regular sequency within five seconds using USER
REMOCON after seting TV/VCR off.




                                                                     11
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. V-CENTER +/- ( VERTICAL CENTER )
   P ress this button to adjust the center line of the pattern coincident w ith the m echanical center m arks of the
   C R T on screen of R E T M A pattern.

4. V-SIZE +/- ( VERTICAL SIZE )
   P ress this button to adjust the upperside of the pattern coincident w ith the m echanical
   center m arks of the C R T on screen of R E TM A pattern.

5. V-SLOPE +/- ( VERTICAL SLOPE )
   P ress this button to adjust the border line of blanked picture coincident w ith the center
   m arks of the pattern.

6. R,G,B +/- ( W HITE BALANCE )
   The screen is becom e W H ITE adjusted R ,G ,B level by this button.

7. ATK OFF ( Auto tracking off )
   P ress this button to adjust X -PAT H adjustm ent.
   FR O N T panel's LE D s are lighted up if you press this button. ( w ithout TA P E )

8. SUB AGC
   P ress this button to adjust S U B TU N E R A G C A djustm ent.
   P ress once : picture is displayed colour pattern.
   P ress tw ice : picture is displayed black/w hite pattern.

9. REC
   P ress this pattern to adjust A U TO P G A djustm ent.

10. LANGUAGE
  P ress this button to adjust LA N G U A G E S E LE C TIO N .




                                                            12
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. AFT-L
  P ress this button to adjust V C O -L. ( only use the S E C A M -L m odel. )

15. POW ER
  P ress this button to turn your TV /V C R on or off.

  If you forget your " child lock secret N o. "
  1. E nter the " S E R V IC E M O D E . "



◦ Jabse Service Manual Search 2020 ◦ Jabse Pravopis ◦ Other service manual resources online : FixyaeServiceinfo