Daewoo DV-K784N-JJ Service Manual Download Page 87

Page: 87 / 128

TROUBLESHOOTING GUIDES (Continued)

Check power circuit.

Is 12V supplied to P502
pin

YES

Check IC601 and D.FG.

Is D.PWM (pin

)

of IC601 correct

Check R503, R523 and C506

Is the voltage of P502 pin

1.2V?

Check connector (P502)
and DRUM Motor

YES

Check power circuit.

Is 12V supplied to P501
pin

YES

Is the voltage of pin

P501 3.2V?

YES

Check R521, R522.

Is the voltage of P501
pin

2.5V?

YES

Check IC601 and C.FG.

Is C.PWM (pin

)

of IC601 correct?

YES

Is the voltage of pin

P501

2~3V

YES

Check connector (P501)
and capstan motor

Check R519, R520,
C504.

Check circuit of R510
R516, R517, R518, C505

Drum Motor dose not rotate.

Capstan Motor does not rotate.

Summary of Contents for DV-K784N-JJ

Page 1: ...ICS CO LTD 686 AHYEON DONG MAPOGU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 82 2 364 5588 TEL 82 2 360 7114 8114 http www dwe daewoo co kr S031GBA PRINTED DATE...

Page 2: ...3 hours SLP mode T120 6 hours SLP mode Fast Forward Rewind Time 3 minutes T 120 tape Tuning System Auto Program Cable Compatible Frequency Synthesis FS Note Specifications are subject to change witho...

Page 3: ...AC Millivolt Meter Sensitivity 1 0mVAC 400VAC Dual Trace Triggered Oscilloscope with Lo Cap X10 and Direct Probes Response DC 20MHz Sensitivity 5mV div Max Sweep Rate 0 1 sec div Frequency Counter 7...

Page 4: ...3 EXTENSION CABLE CONNECTION A C HEAD PCB TO CAPSTAN MOTOR CABLE2 TO DRUM MOTOR CABLE1 CABLE3 P201 P502 P601 P501 MAIN PCB L C MOTOR PCB...

Page 5: ...t board with the DECK assembly connected To imitate the function of the sensors insert the SVC Mode Diode D707 on the MAIN circuit board as shown below STOP EJECT CH DN POWER CH UP D707 REC REW FWD PL...

Page 6: ...pply heat to both electrodes When the solder on both electrodes is melted remove leadless component with a twist ing motion LEADLESS CHIP COMPONENT REMOVAL INSTRUCTION Note a Leadless component must n...

Page 7: ...r removing solder chips from IC s pins use a solder remover or a wiry solder absorber 2 Heat the IC s tips evenly by moving the chip IC replacing tool around them and detach the IC s leads with a tool...

Page 8: ...tion 1 Chip Resistor Identification Standard Chip Resistor Code 2 Chip Capacitor Identification There is no identification of chip capacitor REMARK Leadless CHIP Components are identified on schematic...

Page 9: ...assette CTL Control CUR Current CV Composite Video D D Drum Digital Diode Drain DC Direct Current DD DC DC Convert DEEM or DEEMPH Deemphasis DEMOD Demodulator DET Dectector DEV Deviation DFG Drum Freq...

Page 10: ...robe SVC Service SW or S W Switch or Switching Pulse SYNC Synchronization SYSCON System Control T TJ Test Jump TP Test Pin TR Transistor TRANS Transformer TRK Tracking TU Tuner U UHF Ultra High Freque...

Page 11: ...OLS AND FUNCTION FRONT VIEW NOTE Model K884N SJ K884N JJ K884N SG K784N SJ K784N JJ K784N SG K884NY SJ M K 884NZ SJ M K884NZ SG M NOTE Model K804N SJ REC REW PLAY FF POWER STOP EJECT CH R VIDEO INDEX...

Page 12: ...mpleted Press rewind button at playback mode to reverse the scan ning on the programmed program material visibly When the picture reaches to the point where you are looking for press the PLAY button t...

Page 13: ...when attached RF OUT Connector Passes signal to TV the cable supplied Audio Input Connector Receives audio signal for recording sound from a view cam era external sound equipment or another VCR Audio...

Page 14: ...Removal Fig 3 1 Remove the top cover and the front panel 2 Remove two 2 screws 3 Lift out the bottom cover in the direction of the arrow F L Door Removal Fig 4 1 Open the F L door 90 degrees 2 Remove...

Page 15: ...the Deck Assembly in the direction of the arrow Main PCB Assembly Removal Fig 7 1 Remove the top cover the front panel the bottom cover the preamp assembly and the deck assembly 2 Release two 2 tabs A...

Page 16: ...al 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 Ass y 16 Cam Gear 17 AC Head Total Ass y 18 T Slant Pole Ass y 19 Dr...

Page 17: ...late 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 0 Q q W w E Fig 10 Tape Transport Mechanism Identification B...

Page 18: ...Prism Link R 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 1 Fig 11 Front Loading Mechanism Identification Top...

Page 19: ...tte holder assembly Fig 13 4 Remove one 1 screw holding the prism link R and remove the prism link R from the F L bracket R Fig 14 5 Remove one 1 screw holding the prism link L Fig 15 6 Release hook B...

Page 20: ...pe path adjustment procedures in the Mechanical Adjustment section of this service publication Reel belt Loading Rack Loading Gers and S T Slant Pole Removal Fig 19 20 1 Turn the Deck Mechanism updide...

Page 21: ...L C bracket assembly from the deck mechanism Fig 22 NOTE When reassembling refer to Fig 23 for alignment instructions Replacement of Pinch Lever Total Assembly Removal Fig 22 1 Remove one 1 washer 2 U...

Page 22: ...assembly from the main base 4 Unhook the T sub brake spring from the main base and discon nect the T sub brake lever assembly from the main base Tension Band Assembly Removal Fig 26 27 1 Remove the t...

Page 23: ...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 separate it from the main base NOTE...

Page 24: ...when reassembling parts in this mechanism be sure to confirm the following instructions to con firm the following 1 Make sure that the datum hole of the cam gear A is aligned with the hole B in the m...

Page 25: ...onfirm that the two 2 triangular marks are aligned 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 EJ...

Page 26: ...ading 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 the hole C of the Loading Rack aligns with the circular m...

Page 27: ...The measured result must meet the specification 35 55 gr 4 If the result is not within the specification get rid of cassette torque meter from the mainbase and adjust the tension spring If the measure...

Page 28: ...n 4 If the mechanism is in the desired mode remove the Power Tension Pole Position Adjustment 1 Make the mode PLAY without a cassette loaded Refer to Operating the VCR Without a Cassette Tape 2 Confir...

Page 29: ...der the normal circumstances will not require adjustment However if noise appears in the playback picture then either the tape damage occured or the tape path has been changed and readjustment of the...

Page 30: ...IC DIAGRAM OF TAPE TRANSPORTING SYSTEM 29 2 1 3 TENSION POLE T GUIDE ROLLER S GUIDE POST A C HEAD FE HEAD T GUIDE POST S GUIDE ROLLER CAPSTAN SHAFT S SLANT POLE PINCH ROLLER DRUM VERTICAL POST T SLANT...

Page 31: ...r edge of the tape and the edge of the AC Head is 0 25 mm 3 If the measure gap exceeds 0 25 mm turn the AC Head Height Screw CCW If not turn it CW Repeat this process until the measuring meets the spe...

Page 32: ...pin on the Path Adj Fixture 4 Connect the channel 2 scope probe to the envelope test pin on the Path Adj Fixture Externally trigger the scope using the SW pulse test pin on the Path Adj Fixture 5 Adju...

Page 33: ...on the Path Adj Fixture 5 Adjust the VR Control on the Path Adj Fixture so that the envelope signal of the test tape is maximum 6 Operate VCR in the Review mode for approximately 15 sec onds and then...

Page 34: ...adjustment procedure reconfirm Fine Adjustment of Envelopes at Drum Entrance Exit Parts 12 X Axis Adjustment Fig 19 Test Points CTL Pulse Test Pin Path Adj Fixture Envelope Test Pin Path Adj Fixture O...

Page 35: ...34 AC001 K884NZ SJ M K884NZ SG M only...

Page 36: ...35...

Page 37: ...36...

Page 38: ...37...

Page 39: ...38...

Page 40: ...UTPUT PULSE 20 A SWP P55 RTP5 OUTPUT AUDIO SWITCHING PULSE 21 RECORD CTL P54 RTP4 TB2in OUTPUT PULSE 22 CAP FG P53 RTP3 CPFGin INPUT CAPSTAN FG INPUT HIGH 23 DRUM PG P52 RTP2 DRPGin INPUT DRUM PG INPU...

Page 41: ...LOCK OUTPUT SERIAL 80 PLL STB P100 CTSO RTS 0 OUTPUT PLL STROBE HIGH 81 Vcc Vcc INPUT Vcc 82 A D Reference Vref INPUT REFERENCE Vcc 83 TV LINE P101 PWM 2 OUTPUT TV LINE INPUT MODE SWITCHING H L 84 REC...

Page 42: ...s of modes This amplified signal becomes a waveform in point A and then output to CTL waveshaping through C508 Rec CTL signal is recorded to CTL terminal by pin 21 during Rec mode CTL wavesheping circ...

Page 43: ...r circuit Reel sensor is directly inserted on main PCB and the transmission type is applied as below Capstan motor speed in high speed rewind mode is controlled by calculating the remain time of a tap...

Page 44: ...4 FL display Bias Circuit 1G 2G 3G 4G 5G 6G 7G 8G P1 a a a a a a a P2 b b b b b b b P3 c c c c c c c P4 d d d d d d d P5 e e e e e e e P6 f f f f f f f P7 g g g g g g g P8 m P9 h P10 j P11 P12 D717 3...

Page 45: ...H 3CH OPEN 4CH GND RF 3 MB MODULATOR B 5V MODULATOR 4 CONTROL MODULATOR OUTPUT SW ON VCR MODE OFF TV MODE 5 VIDEO INPUT MODULATOR VIDEO INPUT 6 BP TUNER PLL IC B 5V 7 BT TUNER B 32V 8 PLL CLOCK PLL CL...

Page 46: ...xer IC IF Amp SAW Filter Video Detector SIF Filter FM Detector AFT VHF OSC UHF Mixer UHF RF Amp UHF OSC PLL IC AGC TV 4 5 8 AUDIO IN CH SW VIDEO IN CLOCK DATA ENABLE AUDIO OUT AFT OUT VIDEO OUT ANT IN...

Page 47: ...ins 2 3 and 4 Operates at H level 2 0 to Vcc 6 F SAP Mode control switch connects to GND At L GND SAP discrimination automatic selection mode 7 FORCED Selection of monural and stereo operations 8 MS 0...

Page 48: ...nput to audio part In case of mono model video signal output of TMI is input to Pin 12 of SW IC where as video signal from input jack is input to Pin 1 of SW IC and Audio signal output of TMI is input...

Page 49: ...NRSW circuit Mode discrimination Stereo discrimination is executed through the detection of the pilot signal amplitude SAP discrimination is executed by means of the 5fH carrier and noise detection a...

Page 50: ...PF SBU OUT ST IN C5 L R RV4 SAP FM DET SAP BPF SAP LPF SAP OUT SAP IN NR SW dbx TV BLOCK MODE CONTROL R2 R3 C2 INJ LOCK SAP DET SAP LED DRIVE MODE CONTROL L R DSB DET Fig 2 Block Diagram Refer to Fig...

Page 51: ...and Y signal are separated by COMB FILTER and the color signal only passes through 3 58 BPF ACC AMP automatically controls burst level After Burst Emphasis boosts burst signal 6dB 3 58MHz carrier is i...

Page 52: ...The stabilized signal is input to main converter and mixed with the 4 21MHz signal come from sub converter Its output is 4 21MHz 629KHz The mixed signal is input to 3 58 BPF in order to pass 3 58MHz...

Page 53: ...LOR KILLER 2HD 7 Buf Buf AGC AMP SP EP HEAD LUMINANCE IC A01 REC COLOR PROCESS 6 8 31 3 18 11 17 10 18 IC151 LINE JACK INPUT SELECT TMI Buf Buf AGC AMP SP EP HEAD CHROMA IC A01 2 3 34 AGC AMP 6M LPF C...

Page 54: ...CD QV QH INSERT Y C MIX PICTURE CONTROL DOUBLE NOISE CANCELLER NONLINEAR DEEMPHASIS VIDEO AMP OSD LINE JACK TMI 10 IC302 IC S01 10 HEAD 14 11 5 16 18 28 9 SP EP IC A01 IC 301 1 3MHz LPF ACC AMP CCD CO...

Page 55: ...input output command switch 13 NTSC PAL NTSC PAL switch input output command switch 14 3 58 4 43 3 58 4 43 switch input output command switch 15 AST Reset input 16 CV OUT Video signal output 17 VDD2...

Page 56: ...udio IC Features i 1 chip type including PB amp Line Amp REC amp ALC circuit EQ switch Auto REC bias circuit ii It is equipped with EQ switch which operates in SP LP EP modes respectively iii ALC leve...

Page 57: ...n circuit R202 R203 and is input to REC Amp and output to Line out too ALC ALC point is fixed to 6dBv output inside of circuit and ALC time can be adjusted by R201 and C202 PB mode The signal read by...

Page 58: ...by comparator Standard Voltage is 320 mVrms If it is bigger or smaller than standard Voltage the compara tor Changes the voltage of Pin 3 So that the BIAS signal which input to pin 1 is always 320 mV...

Page 59: ...high band frequency inside of IC itself without Peaking Coil using reactance of R P Head This is a different to prior Audio circuit So to adjust frequency characteristics in this circuit we are using...

Page 60: ...Oscillation adjustment circuit In case of the IC without setting i e Zener Zap is not con ducted its fo can be adjusted by Bus Data In TA1246F 255 per channel can be adjusted by Sub Add No 5 and 6 st...

Page 61: ...d by Emphasis same as FM broadcasting audio There are two kinds of Emphasis NR Emphasis and FM Emphasis High frequency is emphasized Pre Emphasis in Record mode and it is de emphasized De Emphasis in...

Page 62: ...y used so far Hence we can meet VHS spec even with less parts and less constants Weighting characteristics is applied to rear part of PNR in Record mode and to front part in Playback mode and NR Noise...

Page 63: ...18 Serial DATA IN 19 Monaural out 20 GND 2 21 Mono ALC Filter 22 FM out 23 VCC 2 24 PB FM AGC Filter 25 PB FM IN 26 ENV Det out 27 Hi Fi Det out 28 Switching Pulse IN 29 Zener Zap Pulse IN 30 FM Mod...

Page 64: ...el by Bus Data in Output Selector and they will be output to Line Out and Monaural Out respectively Maximum signal level is adjusted by ALC circuit in Monaural Out Normal Audio Normal Audio IC s signa...

Page 65: ...s used for adjusting tracking of head It detects the Envelope Detection of playback FM signal after passing BPF Channel of Envelope Detection L CH or R CH is selected by Bus Data Hi Fi Detection Force...

Page 66: ...65 ELECTRICAL ADJUSTMENTS Fig 1 Circuit Board Location...

Page 67: ...66 ELECTRICAL ADJUSTMENTS Hi Fi MODEL A V JACK PT01 DECK ASSAMBLY POWER SUPPLY PG SHIFTER R595 FRONT R191 STEREO SEPARATION T M I Fig 2 Main board test point control location guide Component R...

Page 68: ...v 50 sec div to PT01 PIN Trigger the scope on channel 1 3 Connect channel 2 scope probe 1V div to the Video Out Jack 4 Set the scope to slope and adjust the PG Shifter control VR595 so that the traili...

Page 69: ...6 520mVp p 200mV 10 sec cm REC IC301 27 510mVp p 200mV 10 sec cm REC IC301 29 550mVp p 200mV 10 sec cm REC IC301 29 550mVp p 200mV 10 sec cm PLAY IC301 30 520mVp p 200mV 10 sec cm REC IC301 30 540mVp...

Page 70: ...WAVEFORMS 2 IC301 37 5 2Vp p 1V 5msec cm PICTURE SEARCH 3 IC301 39 2 4Vp p 1V 10 sec cm REC 3 IC301 39 2 4Vp p 1V 10 sec cm PLAY 4 IC301 44 5Vp p 2V 10msec cm REC PLAY 5 IC301 49 600mVp p 200mV 0 5 s...

Page 71: ...20mV 0 2msec cm REC 7 IC301 59 1 5Vp p 0 5V 0 2msec cm REC 8 IC301 60 0 3Vp p 50mV 0 2msec cm REC 9 IC301 64 2Vp p 0 5V 0 2msec cm REC 0 IC301 8 85mVp p 20mV 0 5msec cm PLAY T201 5 60Vp p 30V 20 sec c...

Page 72: ...5Vp p 2V 5 sec cm REC PLAY IC601 4 5Vp p 2V 5 sec cm REC PLAY Q IC601 18 5Vp p 2V 5msec cm REC PLAY q IC601 23 5Vp p 2V 10msec cm REC PLAY W IC601 24 5Vp p 2V 0 5msec cm REC PLAY w IC601 22 5Vp p 2V 0...

Page 73: ...360mVp p 100mV 0 5msec EE REC PLAY T IC901 7 900mVp p 200mV 0 5msec EE REC t IC901 22 1100mVp p 500mV 1msec REC Y IC901 25 400mVp p 200mV 2msec PLAY y IC901 33 900mVp p 200mV 0 5msec EE REC U IC901 47...

Page 74: ...295 295 1 142 142 142 142 142 142 142 295 295 295 295 295 295 295 2 142 142 142 142 142 142 142 3 N C N C N C N C N C N C N C MODE POWER PIN No STOP REC PLAY REW REV FWD REC PLAY F FWD SEARCH PAUSE PA...

Page 75: ...5 0 5 0 5 0 5 0 5 0 5 0 5 38 0 0 0 0 0 0 0 39 1 8 1 8 1 8 1 8 1 8 1 8 1 8 40 4 0 4 0 4 0 4 0 4 0 4 0 4 0 41 2 0 2 2 2 2 2 2 2 2 2 0 2 2 42 3 2 3 2 3 2 3 2 3 2 3 2 3 2 MODE IC VIDEO AUDIO PIN No STOP R...

Page 76: ...8 2 0 1 8 2 0 1 8 2 0 C 0 0 0 0 0 0 0 B 1 2 1 2 1 2 1 2 1 2 1 2 1 2 MODE IC OSD PIN No STOP REC PLAY REW REV FWD REC PLAY F FWD SEARCH PAUSE PAUSE 1 0 0 0 0 0 0 0 2 2 5 2 5 2 5 2 5 2 5 2 5 2 5 3 2 5...

Page 77: ...NE 1 INPUT 1 0 0 2 CONTROL 1 0 0 3 TUNER INPUT 3 4 3 4 4 CONTROL 2 4 7 0 TUNER H 5 GND 0 0 Q152 E B C TUNER 2 6 1 9 0 LINE 2 6 1 9 0 Q153 E B C TUNER 0 4 3 0 LINE 0 4 3 0 MODE PIN NO NAME EE REC EE RE...

Page 78: ...FWD REC PLAY F FWD SEARCH PAUSE PAUSE 44 0 0 5 2 0 5 2 0 5 2 45 0 0 0 0 5 2 0 5 2 46 0 0 0 0 5 2 0 5 2 47 5 2 5 2 5 2 5 2 5 2 5 2 5 2 48 5 2 5 2 5 2 5 2 5 2 5 2 5 2 49 0 0 0 0 0 0 0 50 0 0 0 0 0 0 0 5...

Page 79: ...0 0 0 0 MODE IC DRIVE PIN No STOP REC PLAY REW REV FWD REC PLAY F FWD SEARCH PAUSE PAUSE 6 0 0 0 0 0 0 0 7 12 4 12 4 12 4 12 4 12 4 12 4 12 4 8 12 4 12 4 12 4 12 4 12 4 12 4 12 4 9 0 9 0 9 0 9 0 9 0 9...

Page 80: ...5 4 5 4 5 4 5 34 4 5 4 5 4 5 4 5 4 5 4 5 4 5 35 4 5 4 5 4 5 4 5 4 5 4 5 4 5 36 4 5 4 5 4 5 4 5 4 5 4 5 4 5 37 9 1 9 1 9 1 9 1 9 1 9 1 9 1 38 4 5 4 5 4 5 4 5 4 5 4 5 4 5 39 4 5 4 5 4 5 4 5 4 5 4 5 4 5...

Page 81: ...ed to pin of SM801 primary Is output voltage of SM801 secondary correct Is output voltage of Q801 emitter 9V Is voltage of cathode of D806 32V OK Change AC CORD Change SM801 Check R804 D802 D807 C810...

Page 82: ...IC601 75 Are 20 and 16 5V supplied to pin and of G701 1 35 Is 5V at pin of IC601 37 Check X602 Check IC601 Check the D804 Check power circuit Check the power circuit and D717 Check IC604 Is 5V applie...

Page 83: ...0V at pin and of IC601 26 81 Do pin and of IC601 oscillate 42 Is 5V applied to pin of IC601 37 Check IC601 Check C813 Check X601 R636 R635 C605 and C606 NO YES YES YES YES NO NO NO B C 43 Check the I...

Page 84: ...79 YES NO 83 14 18 Check the video output signal pin of IC303 NO YES NO YES 8 80 YES E Is 5V supplied to pin of IC601 76 YES NO Is GND applied to pin of IC601 75 YES Is 5V applied to pin of IC601 37...

Page 85: ...Q of IC601 YES NO NO Check IC601 NO Noise appears although change cassette tape CTL HEAD height is normal and there is not dust YES Check CTL in circuit R515 C510 C511 CTL AMP circuit R512 R513 R514...

Page 86: ...eck pattern Is Enve waveform supplied to at pin of PT01 YES NO Check VIDEO circuit Check connector Head Amp and Clean heads Is Reel pulse applied to pin and of IC601 YES NO YES NO Check REEL sensor pa...

Page 87: ...nd DRUM Motor J YES YES Check power circuit NO Is 12V supplied to P501 pin YES NO Is the voltage of pin P501 3 2V YES Check R521 R522 NO Is the voltage of P501 pin 2 5V YES Check IC601 and C FG NO Is...

Page 88: ...NO Are Rin and Fin applied to of IC602 NO Is CAM SW DATA C601 pin W w E and e Correct YES YES YES Check IC601 Check IC602 and loading motor Check connector P601 and CAM SW in DECK Meckanism YES NO Ch...

Page 89: ...YES NO M Is 6V applied to pin of IC602 NO Change IC602 Pin R of IC601 Is 5V applied to pin of IC602 when CST IN YES NO Is 6 2V applied to pin of IC602 when CST IN YES NO Check connector P601 pin and...

Page 90: ...B pattern Is signal input into pin o of IC301 YES NO Is signal output from pin I of IC301 YES NO Check IC601 YES Check power circuit Change IC303 Is signal Input into pin 8 of ICS01 YES NO Is signal o...

Page 91: ...ut from IC301 pin I YES Check OSD circuit NO NO YES NO Low High NO YES NO YES NO NO NO NO NO NO YES YES Is 5V supplied at ICA01 pin 5 Check PCB pattern Check IC301 pin y 5V Check IC301 pin q EE mode L...

Page 92: ...REC H signal supplied ICA01 pin Is C sync signal supplied ICA01 pin Is SW pulse input into ICA01 pin Is REC signal output from pin 8 7 SP mode pin 7 SLP mode pin 8 Check video head and connector Check...

Page 93: ...Continued YES D Is composit video signal output from IC301 pin I YES NO Is 5V supplied at ICS01 pin e 7 YES YES NO Check IC601 NO Check power circuit Change ICS01 Check serial data ICS01 pin OSD Chara...

Page 94: ...V applied to pin of IC901 and pin J of IC301 Check INPUT JACK Is signal input pin of IC901 in line mode YES NO Is 0V applied to pin of IC901 YES NO YES NO Check SYSCON circuit Change IC901 Is there ou...

Page 95: ...Q more than 200mVp p Is A SW PULSE input into pin w of IC901 Is pin W of IC901 0V Change IC901 Is the ENVE level into pin Q of IC901 NO Check the ICH01 of PRE AMP circuit NO Check IC601 YES Change IC...

Page 96: ...O Check IC601 Is there output at pin of IC901 Clean HEAD Is there FM osc wave at pin of PA01 NO Check IC901 NO Check pin 2 of ICH01 Check pin 5 of ICH01 YES NO Check IC601 YES YES YES YES No Hi Fi sou...

Page 97: ...o pin of IC901 and pin J of IC301 NO Is 9V applied pin U of IC901 NO Check Power circuit Is there Audio output pin of IC301 Is pin of IC301 GND NO Check A C head Check P201 and A C head NO NO Check Po...

Page 98: ...O Check IC301 Is the voltage above 5 8V at pin of T201 Is 0 7 3 0V to Collector of Q205 YES NO Check power circuit NO YES Check A C HEAD and connector pin of P201 Check INPUT JACK NO Check Q205 IC301...

Page 99: ...98 INTERCONNECT WIRING DIAGRAM K884N K784N K804N Hi Fi INTERCONNEC WIRING DIAGRAM REV 1 97 2 5...

Page 100: ...99 POWER SUPPLY SCHEMATIC DIAGRAM FREE VOLTAGE K884NY SJ M K884NZ SJ M K884NZ SG M...

Page 101: ...100 POWER SUPPLY SCHEMATIC DIAGRAM 120V ONLY K884N SJ K884N JJ K884N SG K784N SJ K784N JJ K784N SG 804N SJ...

Page 102: ...101 PRE AMP SCHEMATIC DIAGRAM K884N K784N 804N Hi Fi PREAMP SCHEMATIC DIAGRAM REV 1 97 2 5...

Page 103: ...102 VIDEO AUDIO SCHEMATIC DIAGRAM K884N K784N K804N...

Page 104: ...103 PIF MPX SCHEMATIC DIAGRAM K884N K784N K804N Hi Fi PIF MPX SCHENATIC DIAGRAM REV 1 97 2 5...

Page 105: ...104 TIMER SYSCON SCHEMATIC DIAGRAM K884N K784N K804N...

Page 106: ...105 Hi Fi AUDIO SCHEMATIC DIAGRAM K884N K784N K804N Hi Fi AUDIO SCHEMATIC DIAGRAM REV 1 97 2 5...

Page 107: ...106 POWER SUPPLY BLOCK DIAGRAM FREE VOLTAGE K884NY SJ M K884NZ SJ M K884NZ SG M...

Page 108: ...107 POWER SUPPLY BLOCK DIAGRAM 120V ONLY K884N SJ K884N JJ K884N SG K784N SJ K784N JJ K784N SG...

Page 109: ...108 PRE AMP BLOCK DIAGRAM K884N K784N K804N Hi Fi PREAMP BLOCK DIAGRAM REV 1 97 2 5...

Page 110: ...109 VIDEO AUDIO BLOCK DIAGRAM K884N K784N K804N Hi Fi VIDEO BLOCK DIAGRAM REV 1 97 2 5...

Page 111: ...110 PIF MPX BLOCK DIAGRAM K884N K784N K804N Hi Fi PIF MPX BLOCK DIAGRAM REV 1 97 2 5...

Page 112: ...111 TIMER SYSCON BLOCK DIAGRAM SEG C SEG F G3 G4 G6 G7 G8 K884N K784N K804N Hi Fi TIMER SYSCON BLOCK DIAGRAM REV 1 97 2 5...

Page 113: ...112 Hi Fi AUDIO BLOCK DIAGRAM K884N K784N K804N AUDIO BLOCK DIAGRA REV 1 97 2 5...

Page 114: ...ET 97P4803100 1 P E ROAM 3 BOX CARTON 97P5043000 1 EX300 SCP150 EX300 4 MANUAL OWNERS 97P9560000 1 ALL MODEL 5 CABLE RF 97P880RN15 1 NTSC 1 5M 6 COVER ACCESSORY 97P0424100 1 LD PE TO 1 7 REMOCON HADSE...

Page 115: ...C212 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 O O O C213 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 O O O C214 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 O O O C216 HCFK103ZCA C CHIP CERA 50V...

Page 116: ...ECTRO 50V RSM 10MF 5X7 TP O O O C351 CEXF1H100A C ELECTRO 50V RSM 10MF 5X7 TP O O O C352 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 O O O C353 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 O O O C354...

Page 117: ...24PF J 2012 O O O C650 CEXF1H479A C ELECTRO 50V RSM 4 7MF 4X7 O O O C801 CL1UE3104M C LINE ACROSS AC275V 0 1MF M 1 40 WORLD O O O A CL1EE3104M C LINE ACROSS AC275V 0 1MF M PCX2 335 W A CL1JB3104M C L...

Page 118: ...A C ELECTRO 50V RSM 1MF 4X7 TP O O O CK10 CEXF1H109A C ELECTRO 50V RSM 1MF 4X7 TP O O O CM01 HCBK822KCA C CHIP CERA 50V X7R 8200PF K 2012 O O O CM02 CEXF1C100A C ELECTRO 16V RSM 10MF 5X7 O O O CM03 CE...

Page 119: ...2MM X O D710 DZN4148 DIODE 1N4148 AUTO 52MM O O O D712 DSR5323V LED SR5323V X O D713 DSR5323H LED SR5323V X O D714 DSR5323H LED SR5323V X O D715 DSR5323H LED SR5323V X O D716 DSR5323H LED SR5323V X O...

Page 120: ...0J COIL PEAKING PL 10UH J TAPPING O O O L201 5CPX101J COIL PEAKING PL 100UH J TAPPING O O O L301 5CPZ680K02 COIL PEAKING 68UH K AXIAL 3 5MM O O O L315 5CPZ100K02 COIL PEAKING 10UH K AXIAL 3 5MM O O O...

Page 121: ...2Y AUTO 1959Y O O O A TSTC1741Y TR STC1741 Y A TZTC1959Y TR KTC1959 Y AUTO A TZTC3205Y TR KTC3205Y AUTO A TZSC2328AY TR KSC2328A Y AUTO Q204 TZTA1266Y TR KTA1266Y AUTO 1015Y O O O A TZSA733CY TR KSA73...

Page 122: ...HRFT152JCA R CHIP 1 10 1 5K OHM J 2012 O O O R209 RD AZ103J R CARBON FILM 1 6 10K OHM J O O O R210 RD AZ103J R CARBON FILM 1 6 10K OHM J O O O R211 HRFT273JCA R CHIP 1 10 27K OHM J 2012 O O O R212 HRF...

Page 123: ...RFT473JCA R CHIP 1 10 47K OHM J 2012 O O O R512 HRFT105JCA R CHIP 1 10 1M OHM J 2012 O O O R513 HRFT752JCA R CHIP 1 10 7 5K OHM J 2012 O O O R514 HRFT221JCA R CHIP 1 10 220 OHM J 2012 O O O R515 HRFT4...

Page 124: ...9 HRFT101JCA R CHIP 1 10 100 OHM J 2012 O O O R630 RD AZ101J R CARBON FILM 1 6 100 OHM J O O O R631 HRFT332JCA R CHIP 1 10 3 3K OHM J 2012 O O O R632 RD AZ102J R CARBON FILM 1 6 1K OHM J O O O R633 HR...

Page 125: ...607300 TUNER 3 IN 1 TMVH2 602A O O O A 97P7608100 TUNER 3 IN 1 TMLH2X010A RK01 RD AZ271J R CARBON FILM 1 6 270 OHM J O O O RK02 RD AZ103J R CARBON FILM 1 6 10K OHM J O O O RK03 RD AZ273J R CARBON FILM...

Page 126: ...M AUTO SW707 5S50101Z97 SW TACT SKHV10914A 9 5M AUTO O O O A 5S50101Z96 SW TACT KSM0614BTS 9 5M AUTO A 5S50101Z98 SW TACT EVQ11L90K 9 5MM AUTO SW708 5S50101Z97 SW TACT SKHV10914A 9 5M AUTO O O O A 5S5...

Page 127: ...C CHIP CERA 50V Y5V 0 01MF Z 2012 O O O CH13 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 O O O CH14 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 O O O CH15 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012...

Page 128: ...012 O O O SYM NO PART CODE PART NAME PART DESC BASIC LED VCR MODEL DIS 2HRS NOTEs N Only apply to the model for Middle America Free Volt DV K884NY SJ M K884NZ SJ M K884NZ SG M Only apply to the model...

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