Service Manual
Contents
1. 10 MW 1400KHz Tune to TC 3 Max output Modulated Signal 11 Repeat steps 9 amp 10 until no further improvement is possible d FM RF alignment Connect Signal Connect Output 8 step Source To Indicator To 1 2 3 FM signal generator connected to FM ant VTVM connected across 4 ohm 4 resistor through Ext sp jack al e PMX P L L OSC FREQUENCY alignment 1 Freguency counter connected to TP 3 Set Sex Tuning Signal To Dial To Adjust For 87 4MHz Minimum L3 Modulated Frequency Stretch or Max output squeeze 108MHz Maximum TCi Modulated Frequency on gang Repeat steps 1 amp 2 until tuning range covers accurately from 87 4MHz to 108MHz 90MHz Tune to L1 Modulated Signal Stretch or Max output squeeze 106MHz Tune to TC 1 Modulated Signal ON gang Repeat steps 4 amp 5 until no further gain can be obtained 1 Adjust 3 Set tuning dial to no signal frequency 2 Controls vr control MAX Set function switch to FM position T Connect Signal Source To 1 Head Azimuth adjust 10 KHz test tape step Rec bias adjust Push down rec level Motor speed adjust 3KHz wow flutter test tape Connect Output Indicator To VTVM Connected across 8ohm Resistor through ext sp jack VTVM connected to TP3 and ground Digital counter and VTVM Connect2. Service Manual Model JR200 CONTENTS Page Page Controls 2 Circuit Diagram 7 Dismantling Procedure 283 Main P C B Component Layout 8 Alignment Procedure 485 Wiring Diagram 9 Tuner Drive Cord Arrangement 6 Tape Mechanisms Exploded View 10 Switch P C B Component Layout 6 Chassis Selected Parts List 11 amp 12 DESCRIPTION AC operated LW MW VHF STEREO RECEIVER DOUBLE CASSETTE RECORDER DISC TAPE SECTION GENERAL SPECIFICATIONS EXTERNAL TERMINAL Head phone jack 3 5mm dia BOTH CHANNELS FM ANT 75 ohm co axial Speaker DIN 2 pin Tape drive Capstan drive POWER SUPPLY AC 240V 50Hz Tape speed 4 75cm sec Play back 4 track stereo e CHASSIS amp CIRCUIT Recording AC bias AM antenna Ferrite Bar antenna Erasing AC erasure FM antenna 75 ohm ANT Moter Electrically governed AFC Built in motor DC 12V ALC Built in Eject Soft gear eject Tape functions Auto stop Mechanical auto stop TAPE A PLAY REW F F STOP eject RADIO SECTION TAPE B PAUSE piano key type REC PLAY REW F F STOP LW 145 265KHz EJECT PAUSE piano key type MW 525 1620 KHz VHF 87 4 10MHz CONTROLS Rotary LW MW VHF DISC TAPE AFC FREQSHIFT Function selector ISSUE 1 JULY 1985 7 s ee CONTROLS Record Pla Volume Balance Cotitfol Treble Cora 1 aye Turn Table 2 3 4 5 Bass Contr 6 7 8 Tape 1 Cassette Compartment Tape 1 Play Key Tape Res
3. 01 D202 D401 D402 D403 D404 D405 D2 D406 Fl L1 L2 L3 L4 L5 L6 L7 1201 L202 L202 R402 R401 R403 cil C10 C28 C225 C224 C37 C38 C233 C234 C33 C34 C121 C215 C220 C402 C404 C406 C401 R2145 R14S VR101 VR102 VR103 VR104 14 21 22 25 26 32 CHASSIS SELECTED PARTS LIST Part No Description Reference TF 1063 REC WIRE GUIDE 33 MA11328 REC WIRE ASSY 34 TP1200 DAMPER GEAR 8 TP1199 GEARSEAT 9 TP1155 TUNING SHAFT 13 T700 MAINS TRANSFORMER BOXING AND FINISHING PARTS TP1291 FRONT PANEL 1 TP1259 TUNING KNOB 2 1P1260 FUNCTION KNOB 3 TP1261 PUSH BUTTON KNOB 4 TP1256 DIAL WINDOW 5 TP1263A CASS WINDOW A 6 TP1263B CASS WINDOW B 7 RACK NH101 LH SIDE PANEL NH102 RH SIDE PANEL NH103 MIDOLE SHELF NH104 BOTTOMPANEL MOTOR BOARD RECORD PLAYER NH105 BACK COVER A520 RECORD PLAYER OTHERS M500 LID NH106 CASTORS NH107 SPEAKER BOX MADE UP NH108 RECORD HOOP UAL P530 INSTRUCTION MANUA PACKING MATERIALS NH109 TOP amp BOTTOM CORRUGATED TRAY NH110 UNIT SLEEVE
4. 02uF cerarhic VHF IC3 PIN Markers asl capacitor 4or5 T ymmetrical 51 l a J Lhqurve 4 5 Repeat steps H through 4 until no further increase in gain is evident c MW LW Range Alignment r i BUSAN 0 Connect Signhl Connect Output Set signal Set Tuning Adjust step Source To Indicator To Signal To Dial To Adjust For 1 525KHz Minimum Modulated Frequency L2 Max output 2 1620K Hz Maximum TC 3 MW Modulated Frequency On Gang Max autput 3 MW LW signa VTVM Connected Repeat steps 1 amp 2 until tuning range covers accurately from generator across 4 ohm 525KHz to 1620KHz connected with resistor through 2 4 sted radiation Ext sp jack 265KHz Maximum TC 5 loop antenna Modulated Frequency Max output LW L A 5 145KHz Minimum ange Modulated Frequency heck 1 1 lt MW LW RF alginment SS So 1 T Connect Signal Connect Output Set Set Tuning Adjust step Source To Indicator To Signal To Dial To Adjust For 170KHz Tune to MW ANT Modulated Signal COIL L5 Max output 1 Lw 245KHz Tune to Max sens Modulated Signal Check AM Signal generat VTVM Connected Repeat steps 8 amp 7 until no further improvement is possible tor connected with across 4 ohm T 8 sted radiation loop resistor through 600KHz Tune to AM ant Ext sp jack Modulated Signal Coil L5 Max output
5. Frequency counter OOND A N GENERAL PREPARATION fe Set function switch to band being aligned 2 Connect grbund of signal source and output indicator to chassis ground unless otherwise specified Ground co nection should bi kept close to signal connection 3 Signal inpu should be kept as low as possible to avoid AGC and miting action 4 Standard nfodulation is 400Hz at 30 amplitude for MW LW at 22 5KHz deviation For FM 1000H bt 33 7KHz Land R 1PKHz 6 7KHz deviation for MPX 5 FM antenng input impedance is 75ohm 1 Tuner Sectibn a MW LWIIF alignment 1 T onnect Sighal Connect Output Set Set Tuning Adjust st Source To Indicator To Signal To tal To Adjust For 1 I IF sweep AM IF sweep ge ver 465KHz Insert High end 1 generator ednnected ator connected t Markers Tuning gang L7 Maximum to TP2 IC3pin4or5 open AM FM output L 2 Repeat step until no further increase in gain is evident Connect Sighal Connect Output Set Set Tuning Adjust step Source To Indicator To Signal To Dial To For 1 FM I F swee FM I F sweep Sweep centered generator o tput generator input at 10 7MHz un Tuning gang Max gain with 2 connected td TP 1 connected to modulated 10 6 open symmetrical HA amp TP 1 throligh 10 7 10 8MHz curve 3 0
6. Key 9 Tape Fast Rorward Key 10 Tape Stop Eject Key 1i Tape 1 Paul Key 12 Tape 2 Cassette Compartment 13 Tape 2 R 14 Tape 2 PI 15 Tape 2 Rewind Key 16 Tape 2 Fast Forward Key 17 Tape 2 Stopy Eject Key 18 Tape 2 Pauje Key 19 Power ON D F Button 20 AFC Freq Shift Button 21 Tape Buttoh 22 Disc Butto 23 Stereo Headphone Socket 24 Power ON Ihdicator 25 Tuning Corltrol 26 FM Stereo Indicator 27 FM Button 4 28 MW Button 29 LW Button DISMANTLING PROCEDURE DJ AG 1 DIAG 2 FRONT PANEL INSIDE VIEW j ASSEMBLY 1 EL ASSEMBLY Remove four screws marked B in the above diagram 1 2 RD ASSEMBLY Remove four screws marked A in the above diagram 1 3 TUNER AMPLIFIER CHASSIS In order to remove the chassis it is first necessary to remove the rotBry control knobs H thd knobs seem tight to remove then insert a piece of nylon string looped behind the knobs find pull Remove screws mark d C on diagram 2 above 4 PLAYBACK DECK Remove screws E diagram 2 RECORD P AYBACK DECK Remove screws D diagram 2 oozur ON 1300W Mala aaao1dxa TUNER ALIGNMENT PROCEDURE For correct alignment the following equipment is necessary AM signal Bienerator FM signal generator VHF AM FM IF sweep generator Audio gentrator MPX stere generator VTVM Oscilloscope Distortion Meter
7. LECTED PARTS LIST SEMICONDUCTORS Part No Description TX4153 IC LA1180 TX4123 IC LA1260 TX4066 IC LA3361 TX4118 1C LA3220 TX4068 IC LA3160 TX4179 IC BA5408 TX1107 TRANSISTOR 2SC536F TX1140 TRANSISTOR 2SD734F DIODES 1X2055 IN4148 TX2059 1N4002 TX2081 GZAIIZ TX4087 LED LN217RP FILTERS amp COILS TW4522 FM ANT FILTER BFWB4 TW1176 FM RF COIL TW4172 FMIFT TW1177 FM OSC COIL TW5102 AM OSC COIL TW1175 MW LW BAR ANT COIL TW4173 FMIFT TW4171 AMIFT TW4145 TRAP COIL 60KHz TW4146 BIAS COIL 60KHz RESISTORS TR9501 10R 0 5W TR8503 4R7 0 5W CAPACITORS TC2031 260pF 50V POLYSTYRENE TC2032 250pF 50V POLYSTYRENE TC2023 1000pF 50V POLYSTYRENE TC2021 500pF 50V POLYSTYRENE TC2508 3n3F 100V POLYSTYRENE TC7206 Au 7 25V ELECTROLYTIC TC7010 1004 10V ELECTROLYTIC TC7111 2204 16V ELECTROLYTIC TC7217 22004 25V ELECTROLYTIC TC1036 POLY VARIABLE CAPACITOR TC0017 20pF TRIMMER PRESETS AND POTENTIOMETERS TR1025 100K PRESET TR1018 10K PRESET TR2518 100K AX2 BASS TREBLE CONTROLS TR2519 100KW BALANCE CONTROL TR2541 100KBX2 VOLUME CONTROL GENERAL TA7084 HEADPHONE JACK SOCKET TA7040 SPEAKER SOCKETS TA7048 FM AERIAL SOCKET TA5024 FUSE T 125 A TP0584 PULLEY MA22040 PULLEY GUIDE ASSY TM3095 DIAL STRING TF2936 REC WIRE BRACKET MA11327 R P DECK ASSY TN218C 280 MA11325 P DECK ASSY TN215C 281 TF3138 RECORD SPRING 11 Reference IC1 1C2 IC3 1C201 1C202 1C301 0101 0102 0201 0202 0401 0402
8. ed across 4ohm through ext sp jack 4 Adjust R14S 10K ohm for 19 0KHz Adjust Adjust For R P head Both L R TAPE B MAX output and PLAY head in phase TAPE A L 203 for min 60KHz leakage signal output VR on motor Read about 3KHz ON digital counter TUNER DRIVE CORD ARRANGEMENT SW P C BOARD ASSEMBLY TOP VIEW La TT AAB al BA Ex augs L iu 5 amp m ris 14 CL gas WOLLO ASIA dOl 00287 ON 1300W ASSY GHVOS D d NIVW 2 2 UM 3 5 5 2 5 da Ram MODEL NO JR200 ve ST LED a CIRCUIT DIAGRAN im Ly JI HE AF ra vms O0 a R Me J peaH 32833 19 peay yoeqAejd poosy 99 jag 63 N dn oye n D uondusseg den igo 168 181 S1HVd 03193793S peaH 27817 19 48197 Alajeg piooay ES Bugs H 3 62 19497 UONNg pio5 Hg v uonduosag ON 0312313S SNSINVHIIN 3dV 1 5184 15 M3IA 030014X3 SWSINVHIJW 3dVL PLAY peck BACK VIEW 0 WIRING DIAGR w M MODEL NO JR200 10240140 CHASSIS SE
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