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14

3-2. Video Circuit

(The operating principles of the video circuit)

1. The signal flow
A. Signal flow of the luminance system in the REC mode.

The recording Video Signal (composite video signal) is input to the AGC amplifier through Pin 12 of IC301, and the sync
signal level is kept constant.
The video AGC circuit is used to keep the amplitude of video signal constant, and two types of AGCs, "SYNC AGC+PEAK
AGC" are incorporated. The switching point for changing from SYNC. AGC to PEAK AGC is set at 110% white level of the
input video signal. The video level at Pin 4 of IC301 becomes 0.5Vp-p when a standard video signal (1Vp-p) is applied to Pin
12 of IC301.
The signal from the AGC circuit is input to the Video AMP circuit through the QV/QH circuit. This Video AMP circuit amplifies
input video signal by about 6dB, and then is input to the buffer (composed of Q309 and R323) through Pin 16 of IC301.
The other signal is as follows:
The chrominance component in the AGC circuit is filtered by a LPF (Low Pass Filter) and the luminance signal (eliminated
chrominance) is fed to the YNR circuit.
In the circuit, vertical enhancing is used for the luminance signal, using an external 1H Delayline (CCD IC: LC89970), and its
output is fed to Pin 4 of IC301. The output signal from Pin 4 of IC301 is input to Pin 5 through the subemphasis circuit. This
signal is then fed to emphasis circuit (consists of Detail Enhancer, Non-linear Emphasis and MAIN Emphasis). then the high
frequencies of the output signal are enhanced by this Emphasis circuit.
This signal is fed to the FM Modulator, and the recording Y-FM signal is obtained from Pin 2 of IC301.
This signal is input to the PREAMP IC (Pin 8 of LA7411: 2 Head, Pin 11 of LA7416: 4 Head).

Video

AGC

QV/QH

Video

AMP

LPF

YNR

Sub-

emphasis

buffer

CLAMP

IH DELAY CCD

IC302

REC

EQ

FM

MOD

MAIN

EMPHA

NL

EMPHA

CARRIER

SHIFT

To. PREAMP CIRCUIT

LA7411

*

PIN INPUT

LA7416

1

PIN INPUT

Video input

2

6

buffer

To OSD

$

%

*

^

8

0

@

*

&

^

BLOCK1. Luminance signal flow in the record mode.

fsc : 4.433619MHz

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Summary of Contents for DV-F24S

Page 1: ...RE STOP MARCHE EJECT ENR IMM R R AV R LECTURE STOP CAN ALIGN CHAINE ENR R R AV R STOP LECTURE EJECT MARCHE Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service Information Center http svc dwe co kr ...

Page 2: ...deo head 4HEAD Input 1 0 Vp p 75 ohms unbalanced Output 1 0 Vp p 75 ohms unbalanced Signal to noise ratio 45 dB Rohde Schwarz noise meter with NETTETE IMAGE control at center position Horizontal resolution 240 lines with NETTETE IMAGE control at center position AUDIO Recording system Longitudinal track Input 8 dBs CENELEC standard more than 47 k ohms unbalanced Output 6 dBs CENELEC standard less t...

Page 3: ...our particular country and locality 4 Leakage current test Confirm specified or lower leakage current between B earth ground power cord plug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc Measuring Method Power ON Insert load Z between B earth ground power cord plug prongs and exposed acce...

Page 4: ...SECTION 7 CIRCUIT DIAGRAM 7 1 CONNECTION DIAGRAM 57 7 2 POWER CIRCUIT 58 7 3 MAIN CIRCUIT 59 7 4 LOGIC CIRCUIT 60 7 5 VIDEO CIRCUIT 61 7 6 2 HEAD PRE AMP CIRCUIT 62 7 7 4 HEAD PRE AMP CIRCUIT 63 7 8 SECAM COLOUR CIRCUIT 64 7 9 AUDIO CIRCUIT 65 7 10 IF MODULE CIRCUIT 66 7 11 PIF CIRCUIT 67 7 12 SW SCART CIRCUIT 68 7 13 OSD CIRCUIT 69 7 14 REMOTE CONTROL CIRCUIT VR F2B 70 SECTION 8 COMPONENTS LOCATI...

Page 5: ... FUNCTIONS MARCHE EJECT ENR IMM CAN ALIGN R R AV R LECTURE STOP FRONT 1 F24S F44S SERIES MARCHE EJECT ENR IMM R R AV R LECTURE STOP CAN ALIGN 2 F26S F46S SERIES CHAINE ENR R R AV R STOP LECTURE EJECT MARCHE 3 F28S F48S SERIES ...

Page 6: ...EAR POWER ON OFF EJECT CHANNEL SELECTION CHANNEL SELECTION RECORD AND OTR ONE TOUCH TIMER RECORDING PLAY STOP REWIND REVIEW FAST FORWARD CUE AUX POUR TV JACK 1 DECODER JACK 2 RF OUTPUT CHANNEL ADJUSTMENT SCREW 3 TEST SIGNAL ON OFF SWITCH 4 ANTENNA INPUT TERMINAL 5 ANTENNA OUTPUT TERMINAL ...

Page 7: ... STOP mode 4 Connect the oscilloscope to TJ401 and trigger the scope with the composite sync at TJ313 5 Adjust RL491 in order to correspond with MAGENTA EDGE section Adj Location Checking Point Measuring Equipment Mode INPUT SIGNAL RL491 TJ401 Signal Gen Oscilloscope STOP SECAM MAGENTA signal TJ401 TJ313 RL491 ICL01 VIDEO PCB VIDEO SET SECAM MAGENTA Signal TOP VIEW CH 1 OSCILLOSCOPE CH 2 SIGNAL GE...

Page 8: ...nnect the Oscilloscope to TJ402 and trigger the scope with the composite sync at TJ313 5 Adjust RL492 in order to correspond with MAGENTA EDGE section TJ402 TJ313 RL492 ICL01 CH 1 OSCILLOSCOPE CH 2 TOP VIEW VIDEO PCB Adj Location Checking Point Measuring Equipment Mode Test Tape R492 TJ402 Signal Gen Oscilloscope PLAY DS 1 Horizontal 10µs div vertical 100mv div ...

Page 9: ...ct any input 3 Connect the Audio level meter to both TP1 and TP2 4 After inserting a blank tape record in SP mode 5 Adjust R292 to obtain 3 0 mVrms TOP VIEW R292 3 0mVrms A C HEAD TP2 TP1 Audio LEVEL METER MAIN PCB Adjustment Parts Checking Point Measuring Equipment MODE INPUT SIGNAL R292 A C Head PCB Audio level meter REC No signal TP1 TP2 ...

Page 10: ...nect the oscilloscope probe to check point 6 Adjust L102 to obtain 2 5V 0 15V DC Voltage at check point ADJUSTMENT PARTS CHECK POINT TEST EQUIPMENT INPUT SIGNAL P102 Signal Gen Refer to L102 PIN Oscilloscope the Power Supply following 2 5V 0 15V DC Q110 Q106 Z104 R192 R191 Z101 IC102 Q101 Q102 R193 L102 P102 5 2 1 Z102 P101 5 4 3 2 1 2 4 2 2µ 50V 56K 2 2µ 50V 27K 15K 12V 0 47µ 50 10K 5V TEST CIRCU...

Page 11: ...int 6 Adjust R192 to obtain minimum RIPPLE at check point Q110 Q106 R192 R191 Z101 IC102 Q101 Q102 R193 L102 P102 5 2 1 Z102 P101 5 4 3 2 1 2 4 2 2µ 50V 56K 2 2µ 50V 27K 15K 12V 0 47µ 50 10K 5V TEST CIRCUIT for AFT and RF AGC adjustment CH1 OSCILLOSCOPE 4 0 5 mS DV 50 mV DIV 10 1 10K Modulation method 100 AM Af 400 Hz fc 38 9 MHz Signal Level 80 dBuV SIGNAL GEN GND OUTPUT MINIMUM RIPPLE IC101 4 AD...

Page 12: ...probe to check point 6 Adjust R193 to obtain 2 5V 0 15V DC voltage at the check point 2 5V 0 15V DC Q110 Q106 R192 R191 Z101 IC102 Q101 Q102 R193 L102 P102 5 2 1 Z102 P101 5 4 3 2 1 2 4 2 2µ 50V 56K 2 2µ 50V 27K 15K 12V 0 47µ 50 10K 5V TEST CIRCUIT for AFT and RF AGC adjustment CH1 OSCILLOSCOPE 1 0 5 mS DV 50 mV DIV 10 1 10K Modulation method 30 AM Af 400 Hz fc 34 3 MHz Signal Level 80 dBuV SIGNAL...

Page 13: ...nt A POINT 6 Adjust R191 to obtain 6 0V 0 2V DC at the check point A POINT 6 0V 0 2V DV Q110 Q106 R192 R191 Z101 IC102 Q101 Q102 R193 L102 P102 5 2 1 Z102 P101 5 4 3 2 1 2 4 2 2µ 50V 56K 27K 15K 12V 0 47µ 50 10K 5V TEST CIRCUIT for AFT and RF AGC adjustment 10K Modulation method 30 AM Af 400 Hz fc 38 9 MHz Signal Level 92 dBuV SIGNAL GEN GND OUTPUT CH1 OSCILLOSCOPE 0 5 mS DIV 100 mV DIV 10 1 A 2 2...

Page 14: ...ia the back emf in the transformer and so the FET is switched on At this time the negative voltage at C811 from the B coil is rectified by D804 and the power is dissipated by R812 The transistor of opto isolator IC801 is switched on drawing current Ic away from the gate of FET Q801 and so switching the FET off Since the power transmitted to the secondary side is of high frequency a fast recovery d...

Page 15: ... changes are fed back to the primary side via the opto isolator to the switching control circuit which controls how long the FET is switched on and the duty cycle of the FET Thus we have voltage regulation If Vr exceeds 2 5V because Vo increases the internal transistor of the shunt regulator will be switched on and the shunt regulator will hold the voltage at Vk In addition the increase in the dio...

Page 16: ...The other signal is as follows The chrominance component in the AGC circuit is filtered by a LPF Low Pass Filter and the luminance signal eliminated chrominance is fed to the YNR circuit In the circuit vertical enhancing is used for the luminance signal using an external 1H Delayline CCD IC LC89970 and its output is fed to Pin 4 of IC301 The output signal from Pin 4 of IC301 is input to Pin 5 thro...

Page 17: ...IC301 as the recording colour signal The output signal from Pin 38 of IC301 is fed to the PREAMP IC 2 Head Pin 7 of LA7411 4 Head Pin 10 of LA7416 C Signal flow of the luminance in the playback mode The playback Y FM from the PREAMP approximately 60dB amplification is fed to the PB EQ circuit to perform frequency limiting and phase compensation The output signal from the PB EQ circuit is input to ...

Page 18: ...sertion circuit and the Video Output Amplifier about 6dB amplification The output of Pin 16 approximately 2Vp p is input to the Buffer circuit consists of Q309 and R323 D Signal flow of the PAL colour in the playback mode FM AGC Double Limiter FM Demod L P F Main De empha L P F Sub deempha buffer Y N R N L De empha Double HP Noise Can Picture Controller IH Delay CCD IC302 Video AMP QV QH Y C MIX R...

Page 19: ...7S SECAM colour The signal at Pin 1 is fed to the REC BELL circuit to be de emphasized The REC BELL output is then fed to Pin 26 of ICL01 This signal is input to Pin 1 of ICL02 LA7356 SECAM DETECTOR and Pin 24 of ICL01 BA7207S The signal input to Pin 1 of ICL02 is used to detect whether the signal is SECAM or non SECAM If this signal is the SECAM colour the voltage at Pin 10 of ICL02 is high almos...

Page 20: ...the quadrupled signal is input to a 4 3MHz BPF in order to eliminate the unwanted signal it is fed to Pin 26 of ICL01 The output signal at Pin 26 is input to Pin 1 of ICL02 and the 12dB AMP circuit The signal input to Pin 1 of ICL02 is used to detect whether the signal is SECAM or non SECAM The other signal is input to the 12dB AMP circuit The 12dB AMP output signal is fed to the Limiter circuit t...

Page 21: ...ched to achieve the optimum IF input signal The IF amplifier output signal is fed to a frequency detector and to a phase detector The frequency detector is operational before lock in A DC current is generated which is proportional to the frequency difference between the input signal and the VCO frequency The control voltage for the VCO is provided by the phase detector The video modulator is a typ...

Page 22: ...fier which consists of three AC coupled differential amplifier stages each with about 20dB gain At the output of each stage is a multiplier for gain control The automatic gain control voltage used to maintain the AM demodulator output signal at a constant level is generated by a mean level detector This AGC detector charges and discharges the AGC capacitor controlled by the output signal of the AM...

Page 23: ...no GND connection needed when checking the secondary circuit When changing IC801 be sure check FUSE and Cement resistance No output Voltage Prepare the instrument by connecting the isolating transformer YES Check F801 FUSE YES Is voltage applied to D801 YES Is voltage applied to the terminals of C807 YES Check voltage of Q801 Gate YES Is voltage output from pin of IC801 YES Check Q801 YES Check D8...

Page 24: ...age NO Check Transformer for No output stage YES Check each DIODE for No output stage YES Check each COIL C for No output stage YES Check the environmental terminals of IC801 802 YES Check D801 L801 YES B CHECKING THE SECONDARY CIRCUIT ...

Page 25: ...R152 R153 YES A V sw module P153 pin Check US pin tuner modulator YES Is audio signal output from P102 pin NO Check QL03 RL17 RL18 NO Check A V sw circuit YES YES NO Is tuner voltage supplied 12V 32V Reconnect US pin NO Change IF module NO Check Q157 Q158 Q159 Check IC601 pin126 Check power circuit YES NO Is BAND SELECTION Data supplied at IC601 37 39 40 pin YES NO Change tuner Check timer cirucit...

Page 26: ...S Are CLK signals supplied to pin i of IC701 YES Is 5V at pin of IC701 YES Check X701 YES Check IC701 and change YES Is the pin of P605 at 6V NO Check power Ass y NO Is the pin of P605 at 28V NO Are the voltage differences between cathode and anode of D610 and D607 3 9V NO Check IC701 NO Change IC701 NO Change X701 NO YES Check the connector and pattern Check power ASS Y YES Change the damaged dio...

Page 27: ...25 Digitron is lit and keys do not operate Is each key pulse applied to pin 2 and 3 of IC701 Check the pin serial of pin u I i of IC701 YES Check key matrix circuit NO B ...

Page 28: ...at pin of IC601 YES Is CTL pluse input to pin of IC601 YES The voltage of pin of IC601 is not changing YES Check IC601 YES NO Noise appears although cassette tape is changed NO Check C510 C511 NO Check R504 C505 NO Check and re adjust the path of Deck YES CTL HEAD height is normal and there is no dust Adjust the HEAD height and remove dust YES Check circuit adjacent to IC601 NO 118 ...

Page 29: ...aveform supplied to pin of PT01 YES Check video circuit YES NO Is sw pulse supplied from pin 9 of IC601 Check D PG input and connector YES Check pattern NO NO Check connector Head Amp and Head dust Change Head NO NO Noise appears on the screen at the bottom Check flow A YES Connect the pin of IC601 to GND for a few seconds NO 117 ...

Page 30: ...28 Auto stop during playback Is reel pulse applied to pin and of IC601 Is D FG applied to pin of IC601 YES C Check IC601 YES NO Check connector and D FG circuits NO Check reel sensor ...

Page 31: ...ps Is motor 12V supplied Is pin D FG of IC601 supplied YES D NO Check C519 C520 R521 and R522 NO Check IC607 and circuit Is pin D PWM of IC601 supplied YES NO Check IC601 Check connector and motor YES Check power ASS Y NO 128 ...

Page 32: ...upplied Is the input of pin of P601 2 5V 3 5V YES E NO Check circuit of R527 R528 R529 and C524 NO Check power ASS Y Is pin 8 of P602 2 5V YES NO Check R519 R520 Does pin of IC601 supply C PWM YES Check connector and motor YES 127 NO Check IC601 ...

Page 33: ... plugged in power cord Is ever 5V applied G NO Check power ASS Y Does X601 crystal oscillate NO Check IC601 and X601 YES Do S DATA CLK and RDY signals of IC601 exchange with IC701 NO Check IC701 when S RDY signal is supplied Check IC601 when S RDY signal is not supplied YES Is CAM SW DATA correct NO Recheck connector and CAM sw contact YES Check IC602 YES Check IC601 YES 7 120 ...

Page 34: ...d at pin of P605 H NO Check power ASS Y Does CAM DATA change after CST IN NO Check connector YES Is 5V applied to pin of IC602 when CST IN NO Is 5V supplied at pin 111 of IC601 YES Check IC602 Check pattern and R526 YES Check Deck part Check IC601 NO NO ...

Page 35: ...es not operate When mains is unplugged is 3 6V at pin Y and m of IC601 YES Check C612 NO I Is sine signal applied to pin S and s of IC601 YES Check X602 NO Is 5V at pin of IC601 YES Check reset circuit IC604 NO Check IC601 YES ...

Page 36: ... YES No sound in the playback mode Is the output at pin of IC201 NO Is 5V applied to pin 1 of IC201 YES Is pin 7 of IC201 at 0V YES Is there an Audio output at pin of IC201 YES Is pin of IC201 at GND YES Check Pattern and AC Head YES Check A V circuits Check IC601 NO NO NO Check IC201 ...

Page 37: ... 5V applied to pin of IC201 NO Check IC601 YES Is there output at pin of IC201 NO Check IC201 YES Does T201 oscillate NO YES Check T201 In the RECORD mode is the collector of Q202 above 10V Check IC601 NO YES Is record current 3 0mVms NO Adjust the Record current YES Is pin of IC201 open NO Check IC201 YES Clean HEAD B ...

Page 38: ...o pin 2 of IC301 NO Check C316 YES Is ON OFF 5V supplied to pin 3 and pin t of IC301 at 5 volts NO Check ON OFF 5V YES Is EE L supplied to anode of D302 at zero volt NO Check EE L YES Is the signal from pin 2 of IC301 fed to pin 6 of IC301 NO Check TRICK H and IC301 YES Is the video signal obtained from pin of ICS01 OSD NO Check Q309 and R323 YES To OSD circuit ...

Page 39: ... pin of PA01 supplied to pin of ICA01 NO Check H A SW YES Is video sw from pin of PA01 supplied to pin of ICA01 NO Check video SW YES Is TRICK H from pin of PA01 supplied to anode of DA01 at zero volt NO Check TRICK H YES To VIDEO circuit YES Is the signal from pin and pin LP mode or pin and pin SP mode fed to pin of ICA01 NO Change ICA01 YES Is the signal from pin fed to pin of PA02 NO Check PB E...

Page 40: ...5 volts NO Check ON OFF 5V YES Is REC H supplied to pin of ICA01 at zero volt NO Check REC H YES Is video sw supplied to pin of ICA01 NO Check video sw YES Is the signal from pin and of PA03 fed to pin of ICA01 NO Change ICA01 YES Is PB5V supplied to pin of PA02 at 5 volts NO Check PB5V YES To video circuit YES Is the signal from pin of ICA01 fed to pin of PA02 NO Check PB EQ circuit ICA01 LA7411 ...

Page 41: ...9 and pattern YES Is the down converted colour signal from pin of PA02 fed to pin of ICA01 NO Check pattern YES Is ON OFF 5V supplied to pin 5 of ICA01 at 5 volts NO Check ON OFF 5V YES Is REC H supplied to pin of ICA01 at 5 volts NO Check REC H YES Is TRICK H supplied to anode of DA01 at zero volt NO Check TRICK H YES To HEAD YES Is the signal from pin and pin 1 fed to pin 7 SP mode and pin 8 LP ...

Page 42: ...gnal from pin of PA02 fed to pin of ICA01 NO Check pattern YES Is ON OFF 5V supplied to pin 2 and pin 5 of ICA01 at 5 volts NO Check ON OFF 5V YES Is REC H supplied to pin of ICA01 at 5 volts NO Check REC H YES Is video sw supplied to pin of ICA01 NO Check video sw YES Is the signal from pin and pin of ICA01 fed to pin 4 of ICA01 NO Change ICA01 YES To Head ICA01 LA7411 ...

Page 43: ...2 of IC301 fed to pin of IC301 NO Are Q301 Q302 Q306 and R310 O K YES Is the luminance signal from pin of IC301 fed to pin of IC301 NO Check Q307 Q311 C302 and R313 YES To PREAMP circuit YES Is the luminance signal from pin of IC301 fed to pin of IC301 NO Is TRICK H supplied to the anode of D309 at zero volt YES Is the modulating luminance signal from pin of IC301 fed to pin of P302 NO Check recor...

Page 44: ...C316 and pattern YES Is ON OFF 5V supplied to pin 3 and pin t of IC301 at 5 volts NO Check ON OFF 5V YES Is EE L supplied to anode of D302 at zero volt NO Check EE L YES Is the down converted colour signal obtained from pin u of IC301 NO Change IC301 YES Is the down converted colour signal from pin u of IC301 fed to pin of P302 through buffer Q312 NO Check Q312 D307 R350 R351and R355 YES To PREAMP...

Page 45: ... NO Check ON OFF 5V YES Is EE H from pin of P303 supplied to pin 9 of ICL01 at 5 volts NO Check EE H YES Is the signal from pin of ICL01 fed to pin through pin q and 12dB AMP circuit NO Check ICL01 and 12dB AMP circuit YES Is the signal from pin of ICL01 fed to pin of P302 through pin of ICL01 and QL407 NO Check QL407 QL408 and PB5V YES To PREAMP circuit 12dB AMP circuit consists of QL413 RL427 RL...

Page 46: ...OFF 5V YES Is EE L supplied to anode of D302 at 5 volts NO Check EE L YES Is Y FM signal from pin of P302 fed to pin of IC301 NO Check C353 YES Is the luminance signal from pin of IC301 fed to pin of IC301 NO Change IC301 YES Is the luminance signal from pin fed to pin of IC301 through Q302 NO Check Q302 and R310 YES Is the luminance signal from fed to pin 6 of IC301 NO Change IC301 YES To OSD cir...

Page 47: ...ed to anode of D302 at 5 volts NO Check EE L YES Is the PAL colour signal from pin u of IC301 fed to pin and pin of IC301 NO Check X301 YES Is the signal from pin and pin of IC301 fed to pin and pin of IC302 respectively NO Change IC301 YES To OSD circuit YES Is the signal obtained from pin of IC302 NO Check IC302 YES Is the colour signal from pin of IC302 fed to pin w through pin E of IC301 NO Ch...

Page 48: ...ES Is SECAM colour signal from 8 fed to pin of ICL01 through pin q and 12dB AMP circuit NO Check 12dB AMP circuit YES Is C SYNC composite sync supplied to pin 6 of ICL01 NO Check C SYNC YES To Video Y C circuit YES Is the signal from pin fed to pin 1 through pin and of ICL01 NO Check ICL01 RL405 LL401 CL404 YES Is the signal from pin 1 of ICL01 fed to pin E of IC301 LA7437 NO Check QL409 RL408 and...

Page 49: ...C301 SECAM color bar output 2 0Vp p Pin 16 of IC301 PAL color bar output 2 0Vp p Pin 2 of IC301 REC luminance 1 1Vp p Pin 4 of P302 PAL REC luminance 270mVp p Pin 4 of P302 SECAM REC luminance 180mVp p Pin 4 of IC301 0 5Vpp Pin 5 of IC301 0 5Vp p Pin 6 of IC301 1 2Vp p 1 Pin 7 of IC301 0 5Vp p 2 Pin 8 of IC301 0 95Vp p 3 Pin 12 of IC301 Color bar input 1 0Vp p 4 Pin 18 of IC301 0 4Vp p 5 Pin 20 of...

Page 50: ...01 C SYNC DOWN Pin 35 of IC301 B G P Pin 38 of IC301 400mVp p Pin 6 of P302 REC PAL color 380mVp p 5 4 WAVEFORMS OF THE SECAM COLOR IN THE RECORD MODE Color bar input Pin 1 of ICL01 SECAM color input 1 0Vp p UP Pin 14 of IC301 C SYNC 4 0Vp p DOWN Pin 16 of ICL01 4 00Vp p Q Pin 24 of ICL01 1 0Vp p q Pin 26 of ICL01 250mVp p W Pin 28 of ICL01 230mVp p w Pin 6 of P302 REC SECAM color 200mVp p ...

Page 51: ...1 0 5Vp p r Pin 16 of IC301 Video out 2 0Vp p T Pin 18 of IC301 300mVp p t Pin 20 of IC301 350mVp p 5 6 WAVEFORMS OF THE PAL COLOR IN THE PB MODE DP 1 test tape Y UP Pin 17 of IC301 Color rotary DOWN Pin 6 of P302 100mVp p y Pin 16 of IC301 Video out 2 0Vp p U Pin 23 and 24 of IC301 300mVp p u Pin 26 of IC301 200mVp p I Pin 28 of IC301 400mVp p i Pin 29 of IC301 400mVp p ...

Page 52: ...00mVp p P Pin 8 of ICL01 170mVp p p Pin 11 of ICL01 320mVp p UP Pin 14 of IC301 C SYMC DOWN Pin 13 of ICL01 2 4Vp p UP Pin 14 of IC301 C SYMC DOWN Pin 16 of ICL01 4 0Vp p Pin 18 of ICL01 PB SECAM color in 60mVp p Pin 24 of ICL01 600mVp p a Pin 29 of ICL01 120mVp p S Pin 28 of IC301 300mVp p s Pin 16 of IC301 SECAM video out 2 0Vp p A Pin 16 of ICL01 160mVp p ...

Page 53: ...OW 10 Vss Vss GND 11 A V DATA P77 RTP23 ED23 OUTPUT A V DATA SERIAL 12 A V CLOCK P76 RTP22 ED2 OUTPUT A V CLOCK SERIAL 13 PIF ON P75 RTP21 ED1 OUTPUT If PIN ON HIGH and then Select the RF HIGH mode otherwise select LINE mode CAPSTAN I CONTROL In case of SLOW mode 14 CAP I LIM P74 RTP20 EDO OUTPUT Others DC 3 2V 15 CAP F R P83 RTP19 OUTPUT CASTAN FWD RVS LOW HIGH To select HEAD AMP PULSE 16 H A SW ...

Page 54: ...forms POWER LOW COMPENSATION operation 32 POWER ON P52 RTP2 OUTPUT To control POWER ON OFF LOW 33 N C P51 RTP1 34 N C P50 RTP0 35 Vcc Vcc 5V 10 To control SECAM L ACCENT 36 VS P47 OUTPUT In case of SECAM L this port s state HIGH is LOW 37 VL P46 To select tuning band VHF LOW band HIGH 38 REC SAFETY P45 INPUT When REC SAFETY SW LOW no REC LOW function It is impossible to record 39 VH P44 OUTPUT To ...

Page 55: ... N C P21 57 MESECAM P20 OUTPUT MESECAM ON HIGH 58 N C P17 59 N C P16 60 EEPROM OUT P15 OUTPUT EEPROM DATA OUT SERIAL 61 EEPROM STB P14 OUTPUT EEPROM STB OUT SERIAL 62 EEPROM CLK P13 OUTPUT EEPROM SERIAL CLOCK SERIAL 63 EEPROM DATA P12 IN OUT EEPROM SERIAL DATA SERIAL 64 N C P11 To select SECAM or PAL HIGH 65 IF SEL P10 OUTPUT SECAM HIGH LOW PAL LOW 66 TV VCR P07 OUTPUT TV VCR HIGH LOW 67 TRICK H P...

Page 56: ... CLOCK OUTPUT SERIAL 82 OSD STB P130 CTS0 RTS0 OUTPUT OSD STROBE OUTPUT LOW 83 ENVE COMP P120 INT2 INPUT Envelope Compare Data input from PULSE PREAMP CIRCUIT 84 Vcc Vcc 85 AMP Vcc AMP Vcc 86 DRUM PG DR PG INPUT PULSE 87 DRUM FG DR FG INPUT PULSE 88 CAP FG CAP FG INPUT PULSE 89 AMP Vref AMP REF OUTPUT Vref 2 5V 90 C C 91 CLAMP F PB CTL CLAMP F PB CTL INPUT 92 CLAMP R CLAMP R INPUT 93 CTL AMP OUT C...

Page 57: ... P111 AN9 OUTPUT To select the direction of LOADING M T LOW HIGH LOADING M T Fin PORT FRD RVS 111 LM ON P110 AN7 OUTPUT LOADING M T Rin PORT LOADING M T operating TABLE 112 N C P107 AN7 113 V ENVE DET P106 AN6 INPUT A D 114 AUDIO IN L P105 AN5 INPUT N C A B C D CAM NAME CAM SUMBER H H H L EJECT CAM 0 H H L L HI REW CAM 1 H H L H STAND CAM 2 H L L H IDLE CAM 3 H L H H REV CAM 4 L L L H SLOW CAM 5 L...

Page 58: ... CAP FG MON OUTPUT AUTO HIGH 123 MESECAM P95 DR PG MON OUTPUT MESECAM HIGH 124 SECAM P94 DR FG MON OUTPUT SECAM HIGH 125 CTL PULSE P93 PB CTL MON OUTPUT PULSE 126 SHARPNESS P92 PWM 2 OUTPUT PB MODE SHARPNESS PULSE or EE MODE V S V S PWM 127 CAP PWM P91 PWM 1 OUTPUT CAPSTAN CONTROL PWM OUTPUT PULSE 128 DRUM PWM P90 PWM 0 OUTPUT DRUM CONTROL PWM OUTPUT PULSE MAX TYP SP LP 5V 4 6875 NT4 B 40 58 30 32...

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Page 73: ...SECTION 8 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW 8 1 PCB MAIN 71 ...

Page 74: ...8 2 PCB POWER 72 8 3 PCB PRE AMP 4HEAD 8 4 PCB PRE AMP 2HEAD ...

Page 75: ...8 5 PCB VIDEO 73 8 6 PCB IF MODULE 8 7 PCB AV SCART ...

Page 76: ...8 8 PCB LOGIC 74 1 DV F24S F44S 2 DV F26S F46S ...

Page 77: ...75 3 DV F28S F48S ...

Page 78: ...919600 1 EPS 2 POLY BAG FOR SET 97P4803100 1 P E FOAM 3 SET TOTAL ASS Y 1 4 BOX CARTON 97P5039900 1 EX300XSCP150XEX300 5 CABLE CONNECTOR 97P8804213 1 HP 505 SECAM TYPE 6 BATTERY 47P7500001 2 AAM 1 5V 7 COVER ACCESSORY 97P0424100 1 LD PE T0 1 8 REMOCON HANDSET AS 97P1R2BM02 1 VR F2BM 9 MANUAL OWNERS 1 ART PAPER ...

Page 79: ...iption Remark 1 WINDOW FRONT 97P1612700 1 PMMA 2 PANEL FRONT 97P0311000 1 Hi PS HB 3 DOOR F L 97P1815000 1 ABS 4 SPRING F L DOOR 97P3040000 1 SWPB 5 KNOB P EJECT 97P1336400 1 ABS 6 HOLDER K F 97P2333500 1 ABS 7 KNOB FUNCTION 97P1336700 1 ABS 8 KNOB CH REC 97P1336600 3 ABS ...

Page 80: ... 97P1613500 1 PMMA 3 SPRING F L DOOR 97P3040000 1 SWPB 4 DOOR F L 97P1815500 1 ABS 5 KNOB P EJECT 97P1336800 1 ABS 6 KNOB CHANNEL 97P1337200 1 ABS 7 KNOB REC FUNCTION 97P1337000 1 ABS 8 KNOB PLAY STOP 97P1336900 1 ABS 9 HOLDER KNOB 97P2333600 1 ABS 10 PLATE EARTH 1 97P096400 1 SUS CSP T0 15 11 PLATE EARTH 2 97P0964100 1 SUS CSP T0 15 1 ...

Page 81: ...rk 1 PANEL FRONT 97P0312700 1 HI PS HB 2 WINDOW FRONT 97P1614700 1 PMMA 3 DOOR F L 97P1816500 1 ABS 4 SPRING F L DOOR 97P3040000 1 SWPB 5 KNOB P E 97P1341300 1 ABS 6 KNOB P S 97P1341900 1 ABS 7 KNOB FF REW 97P1341400 1 ABS 8 KNOB CH REC 97P1341500 1 ABS 9 HOLDER K F 97P2334700 1 ABS ...

Page 82: ...6 SCREW TAPPTITE 7173401211 2 TT2 BIN 4X12 MFZN BOARD ANT FIX 17 SCREW TAPPTITE 7173401012 5 TT2 BIN 4X10 MFZN COVER TOP FIX 18 SCREW TAPPTITE 7174301011 3 TT2 RND 3X10 MFZN C BOTTOM FIX 19 SCREW TAPPTITE 7173401211 2 TT2 BIN 4X12 MFZN BRKT F L FIX 20 SCREW TAPPTITE 7278300811 1 TT3 WAS 3X8 MFZN MODULATOR FIX 21 SCREW TAPPTITE 7274300811 1 TT2 RND 3X8 MFZN PREAMP FIX 22 SCREW TAPPTITE 7174300811 1...

Page 83: ...ENT DISASSEMBLY 1 Top Cover Removal Fig 1 1 Remove five 5 screws holding the top cover 2 Carefully lift the back of the top cover and slide to the rear to remove REMOVE TWO SCREWS REMOVE TWO SCREWS REMOVE SCREW Fig 1 ...

Page 84: ... the top cover 2 Remove two 2 screws securing front panel 3 Remove the F L bracket 4 Release seven 7 tabs holding the front panel 5 Remove the front panel RELEASE TWO TABS REMOVE TWO SCREWS BRKT F L RELEASE TWO TABS RELEASE THREE TABS Fig 2 ...

Page 85: ...3 3 Bottom Cover Removal Fig 3 1 Remove the top cover and front panel 2 Remove three 3 screws 3 Release four 4 tabs and lift out the bottom cover REMOVE TWO TABS REMOVE THREE SCREWS REMOVE TWO TABS Fig 3 ...

Page 86: ...84 4 F L Door Removal Fig 4 1 Open the F L door 90 2 Remove the F L door in the direction of arrow REMOVE F L DOOR Fig 4 ...

Page 87: ...he top cover bottom cover and front panel 2 Release four 4 tabs holding the PCB Logic AS 3 Tilt PCB Logic AS forward to remove in the direction of arrow DISCONNECT CONNECTOR RELEASE TWO TABS RELEASE TWO TABS RELEASE TWO TABS PCB LOGIC AS Fig 5 ...

Page 88: ...nt panel 2 Remove three 3 screws 3 Remove the PCB SMPS AS in the direction of arrow 4 Release four 4 tabs and lift out the BRKT PCB in the direction of arrow 5 Pull out the PCB VIDEO AS in the direction of arrow RELEASE FOUR TABS BRKT PCB PCB SMPS AS REMOVE THREE SCREWS PCB VIDEO AS Fig 6 ...

Page 89: ...2 Remove five 5 screws 3 Disconnect the connector and the FPC 4 Pull out the PCB HEADAMP AS in the direction of arrow 5 Pull out the HEAD AMP AS in the direction of arrow 6 Pull out the DECK AS in the direction of arrow REMOVE ONE SCREW DISCONNECT CONNECTOR DISCONNECT FPC REMOVE FOUR SCREWS Fig 7 ...

Page 90: ...emoval Fig 8 1 Remove the top cover bottom cover and front panel 2 Remove two 2 screws 3 Release two 2 tabs and lift out the main PCB in the direction of the arrow RELEASE TWO TABS REMOVE TWO SCREWS PCB MAIN ASS Y Fig 8 ...

Page 91: ...9 5 JIG PCB CONNECTION DIAGRAM VIDEO JIG VIDEO PCB DEC DECK ...

Page 92: ...A V SCART GIG SMPS JIG POWER N PCB G A V SCART PCB ...

Page 93: ...Auto Insertion Tolerance Symbol Tolerance F 1 G 2 J 5 K 10 M 20 N 30 Value Example 478 0 47Ω 479 4 7Ω 470 47Ω 471 470Ω 472 4 7KΩ 473 47KΩ Pin Length Value Same as Fixed Type Knob Type Material Shape Knob Code VERTICAL HORIZONTAL VERTICAL HORIZONTAL VERTICAL HORIZONTAL VERTICAL HORIZONTAL CARBON FILM METAL GRAZE CARBON SOLID CERMIET 1 2 5 6 WITH 1 11 WITH 3 13 WITH 1 21 WITH 3 23 WITH 1 51 WITH 3 5...

Page 94: ...yester Q Mica Oil T Tantal Distance Code Voltage 0J 6 3V 1A 10V 1C 16V 1D 20V 1E 25V 1V 35V 1G 40V 1H 50V 1J 63V 2A 100V 2B 125V 2C 160V 2D 200V 2E 250V 2F 315V Characteristic Capacitance Temperature Coefficient ppm C Coefficient ppm C A 100 F 15 B 30 G 30 C 0 H 60 H 30 J 120 L 80 K 250 P 150 L 500 R 220 M 1000 S 330 N 2500 T 470 U 750 V 1000 SI 350 1000 Distance Same As Fixed Resistor Value Same ...

Page 95: ... BA582 SMD TYPE D105 DBB619 B DIODE CHIP BB619 SMD TYPE D106 DZA105R1L DIODE ZENER MA 1051L 5R1 D107 DZA105R1L DIODE ZENER MA 1051L 5R1 IC101 1TDA9802 IC RF TDA9802 LOC PART CODE PART NAME PART DESC IC102 1TDA9830 IC RF TDA9830 L101 5CPX689K COIL PEAKING 6 8UH 5MM K RADIAL L102 56B208K664 COIL PIF TRF 7780 L103 5CPX680J COIL PEAKING 68UH J RADIAL L104 5CPX100J COIL PEAKING PL 10UH J TAPPING L105 5...

Page 96: ... CBXF1H104Z C CERA SEMI 50V F 0 1MF Z TAPPING CA17 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING CA19 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING CA20 CEXF1A470A C ELECTRO 10V RSM 47MF 6 3 7 CA23 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING CA24 CXSL1H300J C CERA 50V SL 30PF J CA25 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING CA26 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING CA27 CXSL1H221J C CERA 50V SL 220PF J TAPP...

Page 97: ...2K OHM J RA16 RD AZ222J R CARBON FILM 1 6 2 2K OHM J RA17 RD AZ562J R CARBON FILM 1 6 5 6K OHM J RA18 RD AZ151J R CARBON FILM 1 6 150 OHM J LOC PART CODE PART NAME PART DESC LA06 5CPX100J COIL PEAKING PL 10UH J TAPPING LA07 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING PA01 97P62T01BA CONN B B TUC PX RECEP 2 0MM 10P PA02 97P62T01B9 CONN B B TUC PX RECEP 2 0MM 9P PA03 97P6289590 CONN HOUSING 00 8...

Page 98: ... C ELECTRO 50V RS 1MF 5X11 TP C311 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING LOC PART CODE PART NAME PART DESC C312 CXSL1H361J C CERA 50V SL 360PF J C314 CEXE1H479A C ELECTRO 50V RS 4 7MF 5X11 TP C315 CCXF1H223Z C CERA 50V F 0 022MF Z TAPPING C316 CEXE1H100A C ELECTRO 50V RS 10MF 5X11 TP C317 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING C318 CEXE1A470A C ELECTRO 10V RS 47MF 5X11 C319 CEXE1H100A C ELECT...

Page 99: ...10 DZN4148 DIODE 1N4148 AUTO 52MM D311 DZN4148 DIODE 1N4148 AUTO 52MM ICL01 1BA7207S IC VIDEO BA7207S SECAM COLOR LOC PART CODE PART NAME PART DESC ICL02 1LA7356 IC VIDEO LA7356 SECAM DET IC301 1LA7437 IC VIDEO PAL LA7437 IC302 1LC89970 IC VIDEO LC89970 PAL CCD IC303 1LA7356 IC VIDEO LA7356 SECAM DET LL401 5CPX120J COIL PEAKING 12UH J RADIAL LL402 5CPX101J COIL PEAKING PL 100UH J TAPPING LL403 5CP...

Page 100: ...ARBON FILM 1 6 330 OHM J RL433 RD AZ152J R CARBON FILM 1 6 1 5K OHM J LOC PART CODE PART NAME PART DESC RL436 RD AZ123J R CARBON FILM 1 6 12K OHM J RL437 RD AZ333J R CARBON FILM 1 6 33K OHM J RL438 RD AZ183J R CARBON FILM 1 6 18K OHM J RL439 RD AZ102J R CARBON FILM 1 6 1K OHM J RL440 RD AZ102J R CARBON FILM 1 6 1K OHM J RL441 RD AZ561J R CARBON FILM 1 6 560 OHM J RL491 RV5426502M R SEMI FIXED H5K ...

Page 101: ...X7 TP CL08 CEXE0J221S C ELECTRO 6 3V RSA 220MF 6 3X7 CL09 CEXE0J221S C ELECTRO 6 3V RSA 220MF 6 3X7 CL10 CEXE0J221S C ELECTRO 6 3V RSA 220MF 6 3X7 CL11 CEXE0J221S C ELECTRO 6 3V RSA 220MF 6 3X7 CL12 CEXF1H100A C ELECTRO 50V RSM 10MF 6 3X7 TP CL13 CEXF1H339A C ELECTRO 50V RSM 3 3MF 4 7 CL14 CEXF1H339A C ELECTRO 50V RSM 3 3MF 4 7 CL15 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP CL16 CBXF1H104Z C CERA ...

Page 102: ... AZ103J R CARBON FILM 1 6 10K OHM J RL14 RD AZ103J R CARBON FILM 1 6 10K OHM J RL15 RD AZ103J R CARBON FILM 1 6 10K OHM J RL16 RD AZ103J R CARBON FILM 1 6 10K OHM J RL17 RD AZ151J R CARBON FILM 1 6 150 OHM J RL18 RD AZ181J R CARBON FILM 1 6 180 OHM J RL22 RD AZ101J R CARBON FILM 1 6 100 OHM J RL23 RD AZ101J R CARBON FILM 1 6 100 OHM J RL24 RD AZ103J R CARBON FILM 1 6 10K OHM J RL25 RD AZ472J R CAR...

Page 103: ...R CARBON FILM 1 6 10 OHM J LOC PART CODE PART NAME PART DESC R814 RD AZ562J R CARBON FILM 1 6 5 6K OHM J R815 RW01Y568J R WIRE WOUND 1W 0 56 OHM J R816 RD AZ103J R CARBON FILM 1 6 10K OHM J R817 RD AZ101J R CARBON FILM 1 6 100 OHM J R818 RD AZ221J R CARBON FILM 1 6 220 OHM J R819 RN AZ4701F R METAL FILM 1 6 4 7K OHM F R820 RD AZ303J R CARBON FILM 1 6 30K OHM J R821 RD AZ102J R CARBON FILM 1 6 1K O...

Page 104: ... CARBON FILM 1 6 5 6K OHM J RS04 RD AZ152J R CARBON FILM 1 6 1 5K OHM J RS09 RD AZ561J R CARBON FILM 1 6 560 OHM J RS10 RD AZ272J R CARBON FILM 1 6 2 7K OHM J RS11 RD AZ205J R CARBON FILM 1 6 2M OHM J RS12 RD AZ123G R CARBON FILM 1 6 12K OHM G RS13 RD AZ273J R CARBON FILM 1 6 27K OHM J RS14 RD AZ272J R CARBON FILM 1 6 2 7K OHM J RS15 RD AZ222J R CARBON FILM 1 6 2 2K OHM J RS16 RD AZ222J R CARBON F...

Page 105: ...J R162 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R163 RD AZ102J R CARBON FILM 1 6 1K OHM J R164 RD AZ183J R CARBON FILM 1 6 18K OHM J R165 RD AZ393J R CARBON FILM 1 6 39K OHM J R166 RD AZ303J R CARBON FILM 1 6 30K OHM J R167 RD AZ114J R CARBON FILM 1 6 110K OHM J R168 RD AZ222J R CARBON FILM 1 6 2 2K OHM J R169 RD AZ105J R CARBON FILM 1 6 1M OHM J R170 RD AZ272J R CARBON FILM 1 6 2 7K OHM J R171 RD A...

Page 106: ... 12K OHM J R204 RD AZ334J R CARBON FILM 1 6 330K OHM J R205 RD AZ103J R CARBON FILM 1 6 10K OHM J LOC PART CODE PART NAME PART DESC R208 RD AZ105J R CARBON FILM 1 6 1M OHM J R209 RD AZ473J R CARBON FILM 1 6 47K OHM J R210 RD AZ113J R CARBON FILM 1 6 11K OHM J R211 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R212 RD AZ512J R CARBON FILM 1 6 5 1K OHM J R214 RD AZ102J R CARBON FILM 1 6 1K OHM J R215 RD AZ...

Page 107: ...CEXE1A470A C ELECTRO 10V RS 47MF 5X11 C657 CCXF1H103Z C CERA 50V F 0 01MF Z TAPPING C658 CEXE1A470A C ELECTRO 10V RS 47MF 5X11 C660 CBZP1C103M C CERA SEMI 16V Y5S 0 01MF M AXIAL D502 DZZ7R5BM DIODE ZENER UZ 7 5BM D503 DZN4148 DIODE 1N4148 AUTO 52MM D506 DZA105R1L DIODE ZENER MA 1051L 5R1 LOC PART CODE PART NAME PART DESC D510 DZN4148 DIODE 1N4148 AUTO 52MM D604 DZN4003 DIODE IN4003 D605 DZN4003 DI...

Page 108: ...530 RD AZ201J R CARBON FILM 1 6 200 OHM J LOC PART CODE PART NAME PART DESC R531 RD AZ273J R CARBON FILM 1 6 27K OHM J R532 RD AZ201J R CARBON FILM 1 6 200 OHM J R533 RD AZ273J R CARBON FILM 1 6 27K OHM J R534 RD AZ223J R CARBON FILM 1 6 22K OHM J 4HEAD RD Az472J R CARBON FILM 1 6 4 7K OHM J 2HEAD R535 RD AZ271J R CARBON FILM 1 6 270 OHM J R536 RD AZ103J R CARBON FILM 1 6 10K OHM J R537 RD AZ473J ...

Page 109: ... FILM 1 6 10K OHM J R676 RD AZ153J R CARBON FILM 1 6 15K OHM J R677 RD AZ103J R CARBON FILM 1 6 10K OHM J R678 RD AZ823J R CARBON FILM 1 6 82K OHM J R679 RD 4Z511J R CARBON FILM 1 4 510 OHM J LOC PART CODE PART NAME PART DESC R680 RD AZ152J R CARBON FILM 1 6 1 5K OHM J R681 RD AZ222J R CARBON FILM 1 6 2 2K OHM J R691 RD AZ123J R CARBON FILM 1 6 12K OHM J R692 RD AZ223J R CARBON FILM 1 6 22K OHM J ...

Page 110: ...612 1 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 02 364 5588 TEL 02 360 7381 7389 DAEWOO ELECTRONICS CO LTD S M NO S015GBA PRINTED DATE APR 96 ...

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