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Daewoo TVZ 1341X, Руководство по обслуживанию

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2. Power circuit (Power supply circuit)

2-1. Abstract and Pin Function

The SMPS(Switch Mode Power Supply) can supply a stable output voltage to each circuit, provided that the input voltage
is within the range of between 108-132 VAC at 60HZ.
Regulation is accomplished by PWM(Pulse Width Modulation) of IC STR-S5707.
The table below identifies the various output volatges:

2-2. I801 STRS-5707

1) BLOCK DIAGRAM

NO. SUPPLY ELECTRIC

SOURCE

SUPPLY CIRCUIT

APPLICATION

RESOURCES

TRANS SECOND RECTIFIED

FBT

FBT B

+

1

DC 125V

VOLTAGE

PIF

For channel

D814

selecting(33V)

2

DC 12V

REGULATOR IC

SERVO circuit

For driving DRUM,

(MOTOR 12V)

I805(PQ12RF11)

CAPSTAN MOTOR

TUNER

For channel selecting(9V, 5V)

3

DC 12V

REGULATOR IC

IF AMP circuit

IF amp. circuit(9V), V/SIF(5V)

(ON/OFF 12V)

I804(PQ12RF11)

AUDIO circuit

For driving AUDIO I/O circuit

VIDEO circuit

For driving VIDEO, ANALOG circuit

4

DC 6.0V

REGULATOR IC

SERVO, TIMER IC

For driving SYSCON, TIMER,

(EVER 5.3V)

I803(KIA7806)

SYSCON IC circuit

SERVO circuit

TRANS SECOND  

5

DC 14V

RECTIFIED VOLTAGE

AUDIO circuit

AUDIO AMP. B

+

D813

6

DC 9V

REGULATOR IC

DEFLECTION circuit

VERTICAL IC B

+

I806 (KIA7809)

H. VCC

START UP

OVP

LA TCH

PROPORTIONAL

DRIVE

OSC

OCP

PRB RBG

T.S.D

SENS

R6

R7

R8

R9

R1

C1

R2

C2

C4

R5

INH

C3

R4

R3

Trl

B

3

C

GND

OCP

SINK

DRIVD

Tr2

PNP

+2D

7

9

VIN

1

4

8

5

6

2

Содержание TVZ 1341X

Страница 1: ...Service Manual TV VCR IN ONE BOARD CHASSIS CN 140 NTSC M SYSTEM MODEL TVZ 1321 TVZ 1341 TVZ 1341X DAEWOO ELECTRONICS CO LTD...

Страница 2: ...60W Input Level Video VIDEO IN jack RCA 1 0Vp p 75 unbalanced Audio AUDIO IN jack RCA 3 8dBm over 100K OHM unbalanced TV Tuner VHF input CH2 CH13 Cable channels A W 75 unbalanced UHF input CH14 CH 69...

Страница 3: ...for reference only Be sure to confirm the precise values for your particular country and locality 4 Leakage current test Confirm specified or lower leakage current between B earth ground power cord pl...

Страница 4: ...a chassis in the cabinet always be cer tain that all the protective devices are put back in place such as non metallic control knobs insulating covers shields isolation resistor capacitor network etc...

Страница 5: ...2 Confirm high voltage protector when R409 of power PCB is connected to 30k 1 4w in parallel 3 If high voltage protector is operated remove 30k 1 4w and confirm whether high voltage protector is stil...

Страница 6: ...C 150 C for about two minutes 1 2 Removing the leadless component Resistors Capacitors Grasp the leadless component body with tweezers and alternately apply heat to both electrodes When the solder on...

Страница 7: ...12K 47x 10 1 47 A Cleaning the Tape Transport System The following parts should be cleaned after every 500 hours of use TENSION POLE S GUIDE POST FE HEAD S SLANT POLE VIDEO HEAD DRUM T SLANT POLE T GU...

Страница 8: ...RJ13 if necessary 4 Loosen the clamp screw holding the yoke and slide the yoke backward to provide a vertical green belt zone in the picture screen 5 Remove the Rubber Wedges 6 Rotate and spread the...

Страница 9: ...and make dot movement com plex B CIRCUMFERENCE CONVERGENCE ADJUSTMENT NOTE This adjustment requires Rubber Wedge Kit 1 Loosen the clamping screw on the deflection yoke to allow to yoke to tilt 2 Place...

Страница 10: ...se Ass y 7 S Sub Brake Ass y 8 S Main Brake Ass y 9 Idler Plate Total Ass y 10 T Main Brake Ass y 11 T Sub Brake Ass y 12 Relay Lever 13 Capstan Motor 14 Pinch Lever Total Ass y 15 L C Bracket Total A...

Страница 11: ...se Ass y 7 S Sub Brake Ass y 8 S Main Brake Ass y 9 Idler Plate Total Ass y 10 T Main Brake Ass y 11 T Sub Brake Ass y 12 Relay Lever 13 Capstan Motor 14 Pinch Lever Total Ass y 15 L C Bracket Total A...

Страница 12: ...ack 22 Connect Plate 23 Reel Belt 24 Reel Gear Total Ass y 25 Record Safety Lever 26 Loading Lever L 27 Loading Lever R 28 Drum Total Ass y 29 Loading Rack Fig 10 Tape Transport Mechanism Identificati...

Страница 13: ...cket R 3 Prism Cap 4 Release Lever 5 Loading Lever R 6 CST Holder Ass y 7 Loading Shaft 8 Loading Lever L 9 Door opener 10 Safety Lever 11 Safety Lever R Fig 11 Front Loading Mechanism Identification...

Страница 14: ...ove the cassette holder assembly Fig 13 4 Remove the prism cap and remove one 1 screw hold ing the prism link R and remove the prism link R from the F L bracket R Fig 4 5 Remove one 1 screw holding th...

Страница 15: ...tape runs smoothly and confirm all tape path adjustment procedures in the Mechanical Adjustment section of this service publi cation Reel belt Loading Rack Loading Gears and S T Slant Pole Removal Fig...

Страница 16: ...moval Fig 22 1 Remove one 1 screw from the L C bracket assem bly and remove the L C bracket assembly from the deck mechanism Fig 22 NOTE When reassembling refer to Fig 23 for alignment instruc tions R...

Страница 17: ...rom the main base and disconnect the s sub brake lever assembly from the main base 4 Unlook the T sub brake spring from the main base and disconnect the T sub brake lever assembly from the main base T...

Страница 18: ...ide down and remove one polywasher 2 Release the tab B of the main base and part the reel gear total ass y from the main base 3 Push the connect plate to the left direction and sepa rate it from the m...

Страница 19: ...hen reassembling parts in this mechanism be sure to confirm the following instruc tions to confirm the following 1 Make sure that the pilot hole on the cam gear A is aligned with the hole B in the mai...

Страница 20: ...onfirm that the two 2 triangular marks align with each other in the EJECT mode Fig 3 4 Make sure that the boss A of the Pinch Lever Total Ass y is positioned at the point B of the cam gear in EJECT mo...

Страница 21: ...ding Gear R Ass y in EJECT mode Fig 5 6 Make sure that the teeth of the Loading Rack are aligned with the those of the Loading Gear R so that hole C of the Loading Rack aligns with the circular mark D...

Страница 22: ...ion 25 33gr 4 If the result is not within the specification adjust the tension spring If the measured result exceeds the specification relocate the spring on the hook A If the value does not reach the...

Страница 23: ...e mechanism is in the desired mode remove the Power by unplugging cord Tension Pole Position Adjustment 1 Make the mode PLAY without a cassette loaded Refer to Operating the VCR Without a Cassette Tap...

Страница 24: ...22 MECHANICAL ADJUSTMENTS CLEANING PATH ROUGH ADJ S GUIDE ROLLER HEIGHT ADJ DRUM TOTAL ASS Y A C HEAD ASS Y PINCH LEVER TOTAL ASS Y S POLE BASE ASS Y T POLE BASE ASS Y TENSION LEVER ASS Y A C HEAD HE...

Страница 25: ...IC DIAGRAM OF TAPE TRANSPORTING SYSTEM TENSION POLE S GUIDE POST FE HEAD S GUIDE ROLLER P2 S SLANT POLE DRUM T SLANT POLE T GUIDE ROLLER P3 A C HEAD T GUIDE POST CAPSTAN SHAFT PINCH ROLLER VERTICAL PO...

Страница 26: ...24 DESCRIPTION 1 TVZ1321 TVZ1341 TVZ1341X 1 1 FRONT OF TV VCR 1 2 SIDE OF TV VCR SPEAKER FRONT DOOR...

Страница 27: ...25 1 3 REAR OF TV VCR VHF Input Connect VHF antenna to this terminal VHF INPUT Rear of TV VCR s...

Страница 28: ...when recording and lights up when set for timer recording 6 CHILD LOCK Yellow indicator This indicator lights up when the child lock is set 7 REC button record Press this button to begin recording Pre...

Страница 29: ...playing 8 REC ON OFF Use this bulletin to enable or disable timer recording 9 MENU Press this button to turn the on screen menu system on and off 10 REW rewind Use this button to rewind the tape or to...

Страница 30: ...on to eliminate video noise when display ing a still frame 22 CLEAR Press this button to erase timer recording settings 23 PLAY Press this button to begin normal playback of a tape or to move the curs...

Страница 31: ...on to turn on the screen menu system on and off 7 CRT ON Not used 8 CH TRACKING Use this button to change channels on your TV or to adjust the tracking of a video tape during playback 9 STD If you pre...

Страница 32: ...hted up if you press this button Use only adjustment tape DN 1 color bar After adjustment Press this button repeatedly until leds are off and Press stop button twice After then Insert tape and confirm...

Страница 33: ...Adjust P2 to position where the edge of ENVELOPE waveform are equal and symmetrical Adjusting P3 is same to P2 s 3 Remarks 1 After adjusting Press this button twice so leds are off 2 Insert the tape...

Страница 34: ...PY09 and trigger the scope with the signal from CH1 2 Adjustment 1 Adjust RN90 to position the falling edge of SW PULSE at 6 5H from the V SYNC Mode Adjustment parts Check point Test equipment Test ta...

Страница 35: ...mVrms 3 Adjustment Inspection Standard 3 0 0 1mVrms If you don t have Service Remocon You can select rec mode by inserting a tape with record tab removed and push ing the rec button Item Mode Adjustm...

Страница 36: ...signal height 2 Adjustment Inspection standard Maximum Point Item Mode Adjustment parts Check point Test equipment Test tape Input signal Audio Azimuth PLAY AC HEAD P602 Signal GEN 7KHz Adjustment SCR...

Страница 37: ...ith the signal from CH1 3 Adjust RY34 to minimize the 3 58MHz Y component of the MULTI BURST signal becomes less than 20 mVp p Location of Adjustment Parts Observation Waveform Y C PCB Horizontal Axis...

Страница 38: ...CH2 to the YNR TP PY05 and trigger the scope with the signal from CH1 3 Adjust RY91 until Color signal becomes minimum Location of Adjustment Parts Observation Waveform Y C PCB Horizontal Axis 10 S D...

Страница 39: ...I501 is selected the selected signal is from pin 43 of I501 and it is input to pin 1 of I503 Another video signal from PLAY MODE is input to pin 4 of I503 Also One of the two signals video signal from...

Страница 40: ...ING TABLE OF I503 MODE RF A V PLAY TOGGLE PIN EE 5 L L H VIDEO 6 H L L AUDIO 12 L H H AUDIO 13 H H L VIDEO The input signal is routed to the output port when the switching port is at logic high state...

Страница 41: ...ng 33V 2 DC 12V REGULATOR IC SERVO circuit For driving DRUM MOTOR 12V I805 PQ12RF11 CAPSTAN MOTOR TUNER For channel selecting 9V 5V 3 DC 12V REGULATOR IC IF AMP circuit IF amp circuit 9V V SIF 5V ON O...

Страница 42: ...6 INH Inhibit Terminal Off Time Synchronizing Latch Terminal Latch Circuit Operation Signal Input 7 SENS Sensing Terminal Constant Voltage Control Signal Input 8 DRIVE Drive Terminal Base Drive Curren...

Страница 43: ...d charges C809 When the voltage across C809 turns off the power to T810 This results in the energy stored in the primary being induced into the secondary circuit PWC1 R804 2 2M COMP 1 2W F801 AC 125V...

Страница 44: ...I701 is made by Mitsubishi Syscon receives the signal from the user s remocon and it becomes serial communication CLOCK S DATA IN S DATA OUT signal Timer IC selects channel with CLOCK DATA EN and rece...

Страница 45: ...signal measured from the lower section of the A C head The Syscon IC then computes the error signal which is then sent to the C PWM 2 VCR OPERATING MODES 1 EJECT MODE that a cassette ejects from the c...

Страница 46: ...are processed for the correct REC characteristics The input signals at pins 7 and 8 of IY03 are processed by the AGC and REC CURRENT AMP before they are recorded onto the tape through the video head...

Страница 47: ...to pass through The color signal is converted to 3 58MHz at Main CONVERTER and is routed to the Y C MIXER after being ampli fied 6dB and then goes through ACC BURST EMPHASIS The Y C signal is output...

Страница 48: ...tions min typ max Unit put put T1 T2 PB mode T12 5 0V T10 OPEN EP SW30 T4 OPEN PB SP MUTE Current dissipation I CCP The current flowing 0 14 18 22 mA into pins 12 Voltage gain L CH1 GVP 1 T17A T7A Vi...

Страница 49: ...EC 5 5 ENV DET PB See attached OUT sheet REC 0 6 GND 2 2 7 PB OUT PB 2 3 REC C IN REC 3 6 8 REC Y IN REC 3 6 1k 100k 1 6V HA COMP 20k 80k 1 2V H SYNC COMP 20k 80k 1 6V REC PB COMP 100 20k 1k 50k 3 2V...

Страница 50: ...0 REC 1 6 10 REC CUR ADJ2 PB 2 5 REC 2 5 11 REC CUR PB 4 5 ADJI REC 5 0 12 VCC 13 REC BIAS PB 0 REC 1 7 14 REC OUT PB 0 REC 4 2 16 PB Amp 19 2 nd Filt PB 2 0 REC 3 6 100 1k 5k 1k 100 10k 20k 500 VCC C...

Страница 51: ...6 2 6 2 6 2 6 11 5 1 4 3 5 1 5 2 5 2 5 2 5 2 12 5 1 5 2 5 1 5 2 5 2 5 2 5 2 13 0 1 7 0 0 0 0 0 14 0 4 2 0 0 0 0 0 15 5 2 5 2 5 2 5 2 5 2 5 2 5 2 16 2 1 3 8 2 1 2 1 2 1 2 2 1 17 0 7 0 7 0 7 0 7 0 7 0 7...

Страница 52: ...IC Logic Diagram Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max 7 0 V Allowable power dissipation Pd max Ta 6 5 C 650 mW Operating temperature Topg 10 to 65 C Storage temperat...

Страница 53: ...figuration Remarks EP SP HCH ON LCH OFF 1 6V Syac H L Trick 1 NORMAL Trick 2 1 5V 3 0V 1 0V EP SP ENV High SW30 REC MUTE 1 0V 3 2V 1 PB Amp PB 2 0 1 9 2 nd Filt 2 2 2 8 REC 3 6 2 TRICK H 3 COMP OUT H...

Страница 54: ...arks 7 REC H PB 0 0 REC 5 0 8 ENV DET PB See attached OUT sheet REC 0 0 9 GND 10 PB OUT PB 2 3 REC C IN REC 3 6 11 REC Y IN REC 3 6 12 AGC FLT PB 0 REC 1 6 13 REC CUR PB 2 5 ADJ2 REC 2 5 14 REC CUR PB...

Страница 55: ...age V Input Output configuration Remarks 16 REC BIAS PB 0 REC 1 7 17 REC SP OUT 18 REC EP OUT PB 0 REC 4 2 20 SP L IN PB 0 7 23 SP H IN 27 EP L IN 30 EP H IN REC 0 21 SP L SW 24 SP H SW PB 0 26 EP L S...

Страница 56: ...tip clamp circuit Sample and hold circuit and output Amp 4fsc clock generator with PLL circuit VCO 4fsc output circuit 4 Absolute Maximum Ratings Items Symbol Unit Min max Conditions Supply Voltage V...

Страница 57: ...16 2 1 2 1 2 1 2 1 4 6 2 5 17 3 9 3 9 3 8 3 9 3 8 3 9 3 8 18 2 8 2 8 2 7 2 8 2 7 2 8 2 7 19 2 7 2 7 2 7 2 7 2 7 2 7 2 7 20 2 7 2 7 2 7 2 7 2 7 2 7 2 7 21 1 9 1 9 1 9 1 9 1 9 1 9 1 9 22 2 2 2 2 2 2 2...

Страница 58: ...t Output configuration Remarks 5 IY01 LA7423A Y C PROCESS IC 56 SYNC DET OUT 1 DC S DET OUT REC Y REC 2 4V 2 MAIN DE PB 2 0V EMPH OUT REC 3 0V 3 CLAMP PB 3 2V EMPH OUT REC 2 1V 4 R P CTL PB 4 4V REC 2...

Страница 59: ...put Output configuration Remarks SP 0 1 5 V 7 MODE CTL LP 1 5 3 2 V EP 3 2 5 0 V REC 3V 8 VCA FILT DC PB 3V REC 2 2V 9 VCA IN PB 2 2V 10 GND 0V REC 1 0V 11 CCD DRIVE PB 1 0V PIC CTL REC 3V SOFT 2 0 2...

Страница 60: ...5V 13 NC CTL under 1 5V N C OFF 2 0 3 0V N C CTL PB 2 5V over 3 8V Y CMix OFF N C Center REC C OUR REC 2 4V 14 PB YC IN PB 3 2V Y FM Low Chroma AGC TC 1 REC 2 4V 15 BALANCER PB 2 3V REC APC REC 2 3V...

Страница 61: ...nfiguration Remarks REC 2 8V 19 SLD FILT PB 2 8V AFC APC REC 2 8V 20 FILT PB 2 8V REC 1 9V XO mode when over 3 5V 21 C OUT PB 1 9V CNR ON when over 3 5V Color 1 9V 22 KILL FILT Killer 3 1V REC 1 7V 23...

Страница 62: ...60 No Pin function Type voltage V Signal waveform Input Output configuration Remarks 25 REG 4 2 4 2V D C 26 SYNC OUT 1 75V when CNR mode 27 VCC 1 28 VIDEO OUT 29 QV QH INS CHARA INS 30 ROT PLS...

Страница 63: ...Input Output configuration Remarks REC 2 7V 31 VIDEO IN PB 2 7V REC 1 6V 32 AGC TC2 D C PB 1 6V REC 0V 33 SVHS FM IN PB 3 7V Normal VHS 0V MOD OUT REC 3 0V 34 DOC STOP H PB 3 6V 3 95 DOC STOP REC 0V...

Страница 64: ...ODE STOP REC PLAY REW FWD REV FF PAUSE STILL 1 0 0 0 0 0 0 0 2 4 6 4 6 4 6 4 6 4 6 4 6 4 6 3 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 5 11 2 11 2 11 2 11 2 11 2 11 2 11 2 6 4 7 4 7 4 7 4 7 4 7 4 7 4 7 7 11 4 11...

Страница 65: ...9 0V 10k Vcc 6 PB NFB PB AMP feedback 3 5V B NPN 7 Vcc Vcc 9 0V 8 PB EQ PB EQ selecting switch 3 5V 55 ON OPEN 9 EQ CTRL EQ control 10 PB OUT EQ AMP output 3 5V EE 11 PB TU EE CTRL PB TU EE control 12...

Страница 66: ...1 3 3 2 3 2 3 2 3 3 3 3 4 0 0 0 0 0 0 0 5 2 8 2 7 3 3 3 3 3 3 3 6 3 6 6 0 9 0 9 3 2 3 2 3 2 3 3 3 3 7 1 4 1 4 3 7 3 7 3 7 5 3 5 3 8 6 6 6 6 6 6 6 PIN MODE STOP REC PLAY 1 6 6 6 2 5 3 0 5 3 3 0 0 0 4 0...

Страница 67: ...turation Voltage 2 Vs12 11 6 1 0 1 8 3 6 V Pump up output Voltage 1 Vs7 8 7 1 0 2 0 3 0 V Pump up output Voltage 2 Vs8 10 8 0 2 0 8 1 6 V No signal Current Ib 9 2 6 mA Center Voltage VCENTER 10 8 0 12...

Страница 68: ...6 18 0 4 8 4 8 4 8 4 8 4 8 4 8 19 0 2 7 2 7 2 7 2 7 2 7 2 7 20 4 7 3 2 3 2 3 2 3 2 4 7 4 7 21 5 2 5 2 5 3 5 3 5 3 5 3 5 3 22 0 0 0 0 0 0 0 23 0 2 6 2 6 2 6 2 6 2 6 2 6 24 0 0 0 0 0 0 0 25 0 0 0 0 0 0...

Страница 69: ...0 0 0 0 51 0 0 0 0 0 0 0 52 0 0 0 0 0 0 0 53 0 0 0 0 0 0 0 54 2 1 3 5 3 5 3 5 2 1 3 5 3 5 55 2 6 2 6 2 6 2 1 5 2 2 6 2 6 56 5 5 5 5 5 5 5 57 5 2 5 2 5 2 5 2 5 2 5 2 5 2 58 5 3 5 3 5 3 5 3 5 3 5 3 5 3...

Страница 70: ...se L of CAP M T 12 C SYNC Composite SYNC 13 REMOCON IN REMOTE controller signal 14 REEL PULSE Take Up Reel Pulse IN 15 STROBE Port to have S DATA with TUNER 16 RENTAL H Set on H when rental 17 D FG Dr...

Страница 71: ...hen special play Audio MUTE output 38 SP L Tape speed SP L output 39 LP L Tape speed LP L output 40 R CTL Change Record CTL DUTY when MARK ERASE mode 41 2HD 4HD 4HD L OR 2HD H 42 A MUTE H Audio Mute o...

Страница 72: ...NT SEARCH DC ENVE input AUTO TRACKING RESTART CONDITION SP 2 5V SPL LP 1 5 5V CASSETTE IN in play mode When tape speed is changed in play mode PB CTL PULSE off PB CTL PULSE on 61 SYSTEM SEL NOT USED 6...

Страница 73: ...9 25 XOUT P63 OSC2 XCIN 28 26 VSS VCC 27 HSYNC INPUT VSYNC INPUT AFT INPUT N C SYNC DETECT INPUT N C N C N C MONITOR POWER ON L OUTPUT SERIAL STROBE OUTPUT TINT PWM OUTPUT COLOR PWM OUTPUT PLL STROBE...

Страница 74: ...S STROBE SERIAL STROBE OUTPUT SIGNAL O LOW 11 P00 PWM4 TINT TINT PWM OUTPUT SIGNAL O 12 P01 PWM5 COLOR COLOR PWM OUTPUT SIGNAL O 13 P02 PWM6 PLL STROBE PLL STROBE OUTPUT SIGNAL O 14 P17 SIN S DATA IN...

Страница 75: ...D 32 P30 N C NOT USED 33 P03 N C NOT USED 34 P16 N C NOT USED 35 P05 N C NOT USED 36 P14 SDA2 N C NOT USED 37 P13 SDA1 E2PROM DATA E2 PROM DATA IN OUT TERMINAL I O 38 P12 SCL2 N C NOT CONNECTED I 39 P...

Страница 76: ...E 47 P05 PWM1 BRIGHT BRIGHT PWM OUTPUT TERMINAL I 48 P04 PWM0 CONTRAST CONTRAST PWM OUTPUT TERMINAL O 49 P55 OUT1 BLANK BLINKING OUTPUT TERMINAL O 50 P54 B B B OUTPUT TERMINAL O 51 P53 G G G OUTPUT TE...

Страница 77: ...VIF IN VIF IN VCC 1 VIF SIF APC FILTER VCC 2 DEF AFC FILTER AFC FBP IN 32fH OSC X RAY PROTECT COINCIDENCE OUT V OUT Vcc 2 VC H OUT COLOR CONT Y OUT R Y OUT G Y OUT B Y OUT OSD B ATT AMP AF AMP EQ DET...

Страница 78: ...detector is a quadrature detector and externally connects to a tank coll or discrimina tor This is also used as an AV switching pin to apply voltage through a 10k GND to EXT Y DL OPEN to TV Y DL Vcc 5...

Страница 79: ...cteris tics Set a filter constant to avoid a sag around 70dB RFAGC delay point is set by the voltage applied to this pin Input resistance is 1k Input capacitance is 7pF The f characteristic of a loop...

Страница 80: ...icture skew ing in the VCR mode However this will increase horizontal jitter in weak signal areas Flyback pulse is limited to 4V to generate the AFC 2 detector pulse Peaks around 4V caus es jitter als...

Страница 81: ...tal AFC is locked otherwise the voltage goes down therefore the pin can be also used as a MUTE detector At that time pay attention to high impedance Pulse as shown below is putput Power supply for VC...

Страница 82: ...CONT 4 5V Video output pin The flyback pulse is required to trigger an internal blanking pulse which also blanks chroma sig nal Open emitter output with maximum current of about 5mA Input impedance i...

Страница 83: ...of 2 5V or more causes blanking Cap character is changed by R As R is decreased the cap character becomes nar rower but phase jitter ing is reduced Use XTAL of the series capacitance type As R is decr...

Страница 84: ...N 4 5V BRIGHTNESS Pin used for holding the most dark parts of a video signal The black peaks are averaged out by this circuitry As R increases more of the blacks are held To decrease killer sensi tivi...

Страница 85: ...N Used to connect the hold capacitor Sharpness control pin By increasing the volt age at this pin the pic ture becomes softer Video level at this pin is 0 5V P P Input level must be kept low to avoid...

Страница 86: ...6 6V 45 TV IN 2 5V 46 VCO COIL 4V 47 Output signal level is 1 5Vp p Sync separation is of the emitter input type Verti cal sync separation is done inside the 1C Signal level is 1V p p Reference tunin...

Страница 87: ...to 0 5V 51 VIDEO OUT Volume control pin A voltage above 2 5V defeats the AFT Current output type As load resistor R is increased detector sen sitivity becomes higher but output becomes larger The sync...

Страница 88: ...86 Pin Function Voltage and Peripheral circuitry Circuit description No wave Information 52 RF AGC OUT Max current output is 0 4mA DESCRIPTION OF PINS cont 50 0 4mA 0 4mA...

Страница 89: ...ry This IC operates in case of Slow Still Que and Review in 4HD To obtain exact signal waveform various signals are input to each channel following are each controlled signal logics 1 Que Ch1 SW PULSE...

Страница 90: ...88 3 Que Ch1 SW PULSE Ch2 pin 15 Logic OR function Ch3 pin 11 CH3 CH1 CH2 4 Que Ch1 SW PULSE Ch2 comp SP SLP Logic AND function Ch3 C Rotary CH3 CH1 CH2...

Страница 91: ...B ENVELOPE 500mVp p 34mS IN03 PIN 1 CTL HEAD 2 5Vp p 34mS IMPORTANT SIGNAL WAVEFORMS 89 IY01 PIN 2 PLAY 500mVp p 63 5 S IN01 PIN 20 CTL PULSE 5 2Vp p 34mS I501 PIN 38 2 5Vp p 63 5 S IY01 PIN 2 REC 500...

Страница 92: ...90 I501 PIN 43 IY01 PIN 31 VIDEO 2 2Vp p 63 5 S IY01 PIN 28 VIDEO OUT PLAY 2 2Vp p 63 5 S IY01 PIN 26 C SYNC 3 6Vp p 63 5 S P504 PIN 4 Y 34Vp p 63 5 S PH502 PIN 2 HEATER PULSE 24Vp p 63 5 S...

Страница 93: ...IU01 3 REC 50Vp p 14 5 S IU01 10 PLAY 1 5Vp p 10 S IU01 12 PLAY 0 5Vp p 10 S IU01 16 REC 150mVp p 10 S 91 IU01 21 REC 1 1Vp p 10 S IU01 22 REC 1 5Vp p 10 S IU01 23 REC SP Mode 150mVp p 10 S LU06 7 RE...

Страница 94: ...ing the power supply unit 1 Before changing components unplug the power cord Then discharge both terminals of C806 through a high wattage resistor measuring in the k ohm region 2 When servicing this u...

Страница 95: ...mal Is feedback Voltage of T801 TRANS normal Above Circuits ok Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No No Are diodes ok D802 D803 D804 D805 Check F801 Power cord Check R803 C80...

Страница 96: ...lector terminals of Q402 normal Is the 180V output from FBT normal Is FBT correct Check CRT PCB Yes Yes Yes Yes Yes No No No No No No No Yes Is the 26 5V output from FBT normal Check R832 R809 Check R...

Страница 97: ...in 7 and pin 1 of I301 Check the waveform at pin 5 of I301 Check the waveform at pin 11 of I301 Check DY connections Above circuits ok Yes Yes Yes Yes Yes Yes No No No No No Is waveform at pin 2 of I3...

Страница 98: ...he collector waveform of Q402 normal Check R406 C413 L402 C409 D404 R407 Above circuits ok Yes Yes Yes Yes No No Yes Check the capacitance of C412 and solder connection Check T401 and L401 Check T402...

Страница 99: ...es Yes Yes Yes No No No Noise streaks moving up and down on the screen Is there CTL pulses at pin 7 of IN03 Is there CTL pulses at pin 20 of IN01 Check IN 01 Noise appears although changed the cassett...

Страница 100: ...ircuit Is the SW pulse supplied from pin 23 of IN01 Check connector Head Amp and Clean heads Check D PG input IN01 pin 18 and connector PY04 Check pattern Yes No No Yes Instrument goes to auto stop du...

Страница 101: ...ector PY04 and DRUM Motor Capstan Motor does not rotate Is the Motor 12V supplied to PY03 pin Check I805 Is the voltage of pin PY03 2 3 5V Check circuit of RN77 RN76 RN75 Is the voltage of PY03 pin 2...

Страница 102: ...blinks Is EVER 6V supplied Check I803 Check IN01 and XN01 Check connector PAN04 CAM SW in DECK Mechanism Does XN01 crystal oscillate Is CAM SW DATA at pin 54 and 55 of IN01 Correct Check IN05 and load...

Страница 103: ...of IN01 Check pattern Check pattern Check DN13 RCN22 RN21 Check IN01 Are there changes in the cam data when the cassette is in Is 6V applied to pin of IN05 when cassette IN Is 5V applied to pin of IN...

Страница 104: ...signal output from pin 43 of I501 Is signal input into pin 4 of I503 Is signal input into pin 38 of I501 Check PIF circuit and LINE IN JACK Check ON OFF 9V circuit Check I501 Check Y C PCB Check pin 5...

Страница 105: ...No video Check clock enable and data of tuner Check pin 35 36 37 of I701 Check oscillation at pin 24 of I701 Check Tuner Is IF signal from tuner normal Refer from EE mode no video trouble shooting flo...

Страница 106: ...Check IY01 pin 24 27 5V Check IY01 pin 4 EE mode L PB mode H Change QY01 Change IY01 Check QY09 and QY07 QY08 QY10 Change IY01 Is signal output from pin 3 of I503 Check pattern Is signal output from I...

Страница 107: ...heck C sync Check IN01 pin 23 Is REC color signal output from IY01 pin 14 Is luminance signal output from IY01 pin 2 Is luminance input to IY01 pin3 Is REC Y FM signal output from IY01 pin34 Is C sync...

Страница 108: ...DN20 DN21 RN91 Change IY03 Change IN01 Check QN11 RCN20 RCN86 RCN87 Check IN01 pin 37 Check IN01 pin 22 Change CCY81 Is trick H input to IY01 pin 34 Is Color Rotary input to IY01 pin 30 Is QU sync in...

Страница 109: ...there is input at pin 48 of I501 Check Z103 CC115 CC116 L104 Check Q101 Base TV L AV H Check if there is input at pin 2 of I501 Check I501 Check if there is output at pin 5 of I601 Check of 14V applie...

Страница 110: ...07 Check QN06 Check IU01 Is 5V applied to pin 11 of IU01 Is pin 24 of of IU01 0V Is pin 3 of IU01 grounded Check pin 3 4 of PAN05 Is the signal applied to pin 1 of I501 Is Q101 base H Check I501 Check...

Страница 111: ...3 Check Q105 Change I501 Check I503 pin 8 Check IU01 pin 24 When recording Check QN06 and IN01 Is the voltage 12V at pin 3 of LU06 Check QU05 Check LU06 Check IU01 Does LU06 pin 5 oscillate Is record...

Страница 112: ...UT 2 62 HORIZONTAL WITH 3 63 WITHOUT 4 64 1 1 RESISTOR CODING ELECTRICAL PARTS LIST Type of Resistor C Composition Resistor D Carbon Resistor F Fusible Resistor K Ceramic Resistor N Metal Film Resisto...

Страница 113: ...lastic Voltage 1 AC125V 2 AC250V 3 125 250V Size A MF41 4 6x16 B MF51 5 2x20 C MF60 6 3x30 D MF61 6 3x31 8 E MF01 10 3x38 1 F MF04 14 3x50 8 G MF05 20 5x76 2 Characteristic Capacitance Temperature coe...

Страница 114: ...XB1H271K C CERA 50V B 270PF K TAPPING C905 CCXB1H271K C CERA 50V B 270PF K TAPPING C906 CCXB1H271K C CERA 50V B 270PF K TAPPING C907 CCXB3D102K C CERA 2KV B 1000PF K TAPPING C908 CEXF2E100C C ELECTRO...

Страница 115: ...NAME PART DESCRIPTION REMARK A001 4859810311 PCB POWER 164 5X94 5 330X246 2X2 C301 CCXB2H102K C CERA 500V B 1000PF K TAPPING C302 CMXM2A103J C MYLAR 100V 0 01MF J TP C304 CMXM2A103J C MYLAR 100V 0 01...

Страница 116: ...R YW025 03 STICK PA403 4850709S02 CONN AS YH025 09 YST025 ULW 300 PA803 4850702S15 CONN AS YPH500 02 YLT500 ULW 300 PA804 4850701S06 CONN AS YFH800 01 YPT018 ULW 300 Q301 TKSC945CY TR KSC 945C Y TAPPI...

Страница 117: ...R M OXIDE FILM 3W 3 6K OHM J SMALL R823 RD 4Z103J R CARBON FILM 1 4 10K OHM J R826 RD 4Z104J R CARBON FILM 1 4 100K OHM J R834 RD 4Z103J R CARBON FILM 1 4 10K OHM J T401 50D0000022 TRANS DRIVE HD 15D...

Страница 118: ...50V CH 47PF J 2012 CCY55 HCBK103KCA C CHIP CERA 50V X7R 0 01MF K 2012 TVZ1321 CCY56 HCBK103KCA C CHIP CERA 50V X7R 0 01MF K 2012 TVZ1321 CCY57 HCBK103KCA C CHIP CERA 50V X7R 0 01MF K 2012 CCY58 HCFK10...

Страница 119: ...IODE 1N4148 TAPPING IY01 1LA7423A IC VIDEO LA7423A Y C 1CHIP NTSC IY02 1LC89960 IC VIDEO LC89960 1H CCD NTSC IY03 1LA7411 IC PREAMP LA7411 2CH PRE REC AMP TVZ1321 LY01 5CPZ180K02 COIL PEAKING 18UH K A...

Страница 120: ...0 OHM J 2012 RCY06 HRFT822JCA R CHIP 1 10 8 2K OHM J 2012 RCY07 HRFT182JCA R CHIP 1 10 1 8K OHM J 2012 RCY09 HRFT272JCA R CHIP 1 10 2 7K OHM J 2012 RCY11 HRFT122JCA R CHIP 1 10 1 2K OHM J 2012 RCY12 H...

Страница 121: ...HRFT203JCA R CHIP 1 10 20K OHM J 2012 TVZ1341 DY06 DIN4148 DIODE IN4148 TVZ1341 RY03 RD AZ102J R CARBON FILM 1 6 1K OHM J TVZ1341 RY04 RD AZ502J R CARBON FILM 1 6 5K OHM J TVZ1341 RY44 RD AZ102J R CAR...

Страница 122: ...220 OHM J RQ04 RD AZ361J R CARBON FILM 1 6 360 OHM J RQ05 RD AZ511J R CARBON FILM 1 6 510 OHM J RQ06 RD AZ112J R CARBON FILM 1 6 1 1K OHM J RQ07 RD AZ221J R CARBON FILM 1 6 220 OHM J RQ08 RD AZ202J R...

Страница 123: ...F 5X11 TP C505 CMXM2A103J C MYLAR 100V 0 01MF J TP C506 CMXM2A182J C MYLAR 100V 1800PF J TP C507 CEXF1H479V C ELECTRO 50V RSS 4 7MF 5X11 TP C509 CEXF1E101V C ELECTRO 25V RSS 100MF 6 3X11 TP C512 CEXF1...

Страница 124: ...05 CCXE2H472P C CERA 500V E 4700PF P TAPPING C806 CEYM2D331T C ELECTRO 200V LWF 330MF 25X50 C807 CEXF1E221V C ELECTRO 25V RSS 220MF 8X11 5 TP C808 CEXF1E221V C ELECTRO 25V RSS 220MF 8X11 5 TP C809 CEX...

Страница 125: ...01MF K 2012 CC513 HCQK431JCA C CHIP CERA 50V CH 430PF J 2012 CC514 HCBK103KCA C CHIP CERA 50V X7R 0 01MF K 2012 CC516 HCBK103KCA C CHIP CERA 50V X7R 0 01MF K 2012 CC517 HCQK101JCA C CHIP CERA 50V CH 1...

Страница 126: ...221JCA C CHIP CERA 50V CH 220PF J 2012 CCN20 HCBK103KCA C CHIP CERA 50V X7R 0 01MF K 2012 CCN24 HCQK120JCA C CHIP CERA 50V CH 12PF J 2012 CCN25 HCQK120JCA C CHIP CERA 50V CH 12PF J 2012 CCN26 HCFK104Z...

Страница 127: ...11 TP CN42 CEXF1C101A C ELECTRO 16V RSM 100MF 6 3X11 TP CN43 CCZB1H102K C CERA 50V B 1000PF K AXIAL CN45 CCZF1E103Z C CERA 25V F 0 01MF Z AXIAL CN47 CCZF1E103Z C CERA 25V F 0 01MF Z AXIAL CN64 CCZF1E1...

Страница 128: ...48 DIODE 1N4148 TAPPING D513 D1N4148 DIODE 1N4148 TAPPING D701 DUZ5R6BM DIODE ZENER UZ 5 6BM TAPPING D702 D1N4148 DIODE 1N4148 TAPPING D703 D1N4003 DIODE 1N4003 TAPPING D704 D1N4003 DIODE 1N4003 TAPPI...

Страница 129: ...52335SP IC CHROMA M52335SP 600 I502 1K1A7809P1 IC REGULATOR K1A7809PI I502A 4857026900 HEAT SINK AL EX I503 1TC4066BP IC TC 4066BP I601 1KA2201N IC AMP KA2201N I701 1M37267103 IC MICOM M37267M6 103SP...

Страница 130: ...CPX103J COIL PEAKING 10MH 5MM J RADIAL LU03 5CPZ101K04 COIL PEAKING 100UH K AXIAL 10 5MM LU04 5CPX103J COIL PEAKING 10MH 5MM J RADIAL LU06 5800000027 COIL OSC DE0 008 P102 485923162S CONN WAFER YW025...

Страница 131: ...ING Q706 TKSC945CY TR KSC 945C Y TAPPING Q801 TKTC3203Y TR KTC3203 Y Q805 TKSC945CY TR KSC 945C Y TAPPING Q806 TKSC945CY TR KSC 945C Y TAPPING QN03 TKTA1266Y TR KTA1266Y QN04 TKTA1266Y TR KTA1266Y QN0...

Страница 132: ...RD AZ101J R CARBON FILM 1 6 100 OHM J R714 RD AZ512J R CARBON FILM 1 6 5 1K OHM J M1911 4851923800 DECK AS SVR K7200 TVZ1321 M1911 4851927200 DECK AS SVR K7400 TVZ1341 R719 RD AZ822J R CARBON FILM 1...

Страница 133: ...10 100K OHM J 2012 RC107 HRFT683JCA R CHIP 1 10 68K OHM J 2012 RC108 HRFT102JCA R CHIP 1 10 1K OHM J 2012 RC110 HRFT331JCA R CHIP 1 10 330 OHM J 2012 RC112 HRFT221JCA R CHIP 1 10 220 OHM J 2012 RC113...

Страница 134: ...30 OHM J 2012 RC523 HRFT102JCA R CHIP 1 10 1K OHM J 2012 RC526 HRFT471JCA R CHIP 1 10 470 OHM J 2012 RC527 HRFT273JCA R CHIP 1 10 27K OHM J 2012 RC529 HRFT561JCA R CHIP 1 10 560 OHM J 2012 RC531 HRFT1...

Страница 135: ...R CHIP 1 10 22K OHM J 2012 RC720 HRFT103JCA R CHIP 1 10 10K OHM J 2012 RC721 HRFT103JCA R CHIP 1 10 10K OHM J 2012 RC722 HRFT103JCA R CHIP 1 10 10K OHM J 2012 RC730 HRFT000 CA R CHIP 1 10 0 OHM 2012...

Страница 136: ...IP 1 10 0 OHM 2012 RCJ18 HRFT000 CA R CHIP 1 10 0 OHM 2012 RCJ19 HRFT000 CA R CHIP 1 10 0 OHM 2012 RCJ20 HRFT000 CA R CHIP 1 10 0 OHM 2012 RCN06 HRFT221JCA R CHIP 1 10 220 OHM J 2012 RCN07 HRFT105JCA...

Страница 137: ...10 5 6K OHM J 2012 RCU04 HRFT272JCA R CHIP 1 10 2 7K OHM J 2012 RCU05 HRFT183JCA R CHIP 1 10 18K OHM J 2012 RCU06 HRFT331JCA R CHIP 1 10 330 OHM J 2012 RCU08 HRFT473JCA R CHIP 1 10 47K OHM J 2012 RCU0...

Страница 138: ...N50 RD AZ102J R CARBON FILM 1 6 1K OHM J RN53 RD AZ103J R CARBON FILM 1 6 10K OHM J RN54 RD AZ103J R CARBON FILM 1 6 10K OHM J RN55 RD AZ274J R CARBON FILM 1 6 270K OHM J RN57 RD 4Z151J R CARBON FILM...

Страница 139: ...ILM 1 6 100K OHM J RU57 RV5426204P R SEMI FIXED EVN DJA A03 200K OHM B SN03 TST5811 TR PHOTO ST 5811 SN04 TST5811 TR PHOTO ST 5811 SW01 5SB0101166 SW TACT KPT 1105A T801 50M4242A3 TRANS SMPS TSM 4242A...

Страница 140: ...140...

Страница 141: ...141...

Страница 142: ...142...

Страница 143: ...143...

Страница 144: ...144...

Страница 145: ...145...

Страница 146: ...EXPLODED VIEW AND SERVICE PARTS LIST 1 1 EXPLODED VIEW OF DECK ASS Y TOP VIEW...

Страница 147: ...1 2 EXPLODED VIEW OF DECK ASS Y BOTTOM VIEW...

Страница 148: ...1 3 EXPLODED VIEW OF F L ASS Y...

Страница 149: ...00 BLACK A1700 97SA310700 PINCHLEVERTOTALAS K MECHA A1800 97S3117300 WASHER POLY D3 6XD8XT0 5 A1900 97SA310400 L C BRKT TOT AS K MECHA A2000 7274300611 SCREW TAPTITE TT3 RND 3X6 MFZN A2100 97SA311600...

Страница 150: ...ENGINEER NOTE...

Страница 151: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 F A X 02 364 5588 5305 T E L 02 360 7360 4 7315 7 PRINTED DATE APR 1997 S M NO CN140N 020...

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