JBL JSR-400 Service Manual
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JBL JSR-400 Service Manual

Dolby pro-logic audio/video surround receiver
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JSR-400
Dolby Pro-Logic Audio/Video
Surround
Receiver
The
JSR-400
ARC CinemaII

SERVICE MANUAL

is part of the
System
JBL Consumer Products Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Rev A 10/99

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Summary of Contents for JBL JSR-400

  • Page 1: Service Manual

    JSR-400 Dolby Pro-Logic Audio/Video Surround Receiver JSR-400 is part of the ARC CinemaII System SERVICE MANUAL JBL Consumer Products Inc. 250 Crossways Park Drive Woodbury, N.Y. 11797 1-800-336-4JBL in the USA A Harman International Company Rev A 10/99...

  • Page 2: Table Of Contents

    CIRCUIT DESCRIPTION ..........13 JSR-400 SCHEMATIC DIAGRAM MAIN BOARD...............42 JSR400 PACKING ............17 JSR-400 SCHEMATIC DIAGRAM JSR400 BLOCK DIAGRAM .........18 CONTROL BOARD ............43 JSR-400 UNIT EXPLODED VIEW ......19 JSR-400 SCHEMATIC DIAGRAM POWER SUPPLY/ JSR-400 ELECTRICAL PARTS LISTS .......20 VIDEO/TONE/ HEADPHONE/ SIMPLE TROUBLESHOOTING ........26 VOLUME PCB’s ............44...
  • Page 3 Dolby Pro-Logic A/V Receiver JSR-400 Ò SPECIFICATIONS Measuring methods are based on IHF and IEC standard 268-3 Measurement conditions, unless otherwise noted: Output resistive load = (8) ohms / Both channels driven Tone (Base, Treble), Balance, EQ control : Center Position, Other SW’s : OFF Nominal input level: 5mV for MM, 0.5mV for MC, 500mV for general purpose inputs...

  • Page 4: Video Section

    Dolby Pro-Logic A/V Receiver JSR-400 Ò Rear Amp Section DESCRIPTION INPUT FREQ. REMARK UNIT LIMIT L/R NOMINAL L/R ³ 50 1kHz (8) ohms ³52 POWER OUTPUT 0.9% THD TOTAL HARMONIC £ 1 1kHz £0.7 DISTORTION ³ 60 ³65 S/N RATIO...
  • Page 5 Dolby Pro-Logic A/V Receiver JSR-400 Ò TUNER Measuring methods in conformity with IEC standard 315 Measurement conditions FM: Radio frequency = 98.1 MHZ, Audio frequency = 1 kHz Reference level = 1mV on ( 75ohms, 300ohms) Test Point: TP 1 = 90.1MHz, TP 2 = 98.1 MHz, TP 3 = 106.1 MHz Filter = B.P.F at STEREO...
  • Page 6 Dolby Pro-Logic A/V Receiver JSR-400 Ò Measuring methods in conformity with IEC standard 315 Measurement conditions AM - MW: Radio frequency = 1000/999kHz Audio frequency = 400Hz LW: Radio frequency = 207kHz Audio frequency = 400Hz Reference level = 5mV/m, 10mV/m on 50ohms...
  • Page 7 Dolby Pro-Logic A/V Receiver JSR-400 Ò CONTROLS AND THEIR FUNCTION VOLUME JSR-400 AV RECEIVER DOLBY SURROUND TUNING P R O L O G I C TUNED STEREO MUTE MEMORY AUTO DOLBY SURROUND PRESET P R O L O G I C...

  • Page 8: Cover

    Dolby Pro-Logic A/V Receiver JSR-400 Ò 16. VCR2: Press this button to select a VCR or video source 22. Auto tune: Press this button when in the AM/FM mode connected to the front panel on the unit. to direct the receiver to seek only the strongest stations when pressing the TUNING button #23.

  • Page 9: Rear Panel Connections

    UNBAL DO NOT EXPOSE THISAPPLIANCE TO RAIN OR MOISTURE". VIDEO 180W AVERTISSEMENT : "AFIN D'EVITER LES DANGERS MODEL NO. : JSR-400 D'INCENDIE ET D'ELECTROCUTION, VCR1 MONITOR DOLBY PROLOGIC RECEIVER NE PAS EXPOSER CET APPPAREIL A LA PLUIE NI A L'HUMIDITE".

  • Page 10: Disassembly Procedures

    Dolby Pro-Logic A/V Receiver JSR-400 Ò DISASSEMBLY PROCEDURES STEP 1. REMOVING THE TOP COVER 1. REMOVING THE SCREWS 1~9 J B L STEP 2. REMOVING THE BOTTOM COVER 1. REMOVING THE SCREWS 1~8 STEP 3. REMOVING THE FRONT PANEL 1. REMOVING KNOB VOLUME MAIN FROM FRONT PANEL 2.
  • Page 11 UNBAL DO NOT EXPOSE THISAPPLIANCE TO RAIN OR MOISTURE". VIDEO 180W AVERTISSEMENT : "AFIN D'EVITER LES DANGERS MODEL NO. : JSR-400 D'INCENDIE ET D'ELECTROCUTION, VCR1 MONITOR DOLBY PROLOGIC RECEIVER NE PAS EXPOSER CET APPPAREIL A LA PLUIE NI A L'HUMIDITE".
  • Page 12 Dolby Pro-Logic A/V Receiver JSR-400 Ò DISASSEMBLY PROCEDURES (continued) STEP 7. REMOVING THE POWER PCB 1. REMOVING THE SCREWS 1~4 STEP 8. REMOVING THE VIDEO PCB 1. REMOVING THE SCREWS 1~2 STEP 9. REMOVING THE MAIN PCB 1. REMOVING THE SCREWS 1~3...

  • Page 13: Circuit Description

    Dolby Pro-Logic A/V Receiver JSR-400 Ò CIRCUIT DESCRIPTION 1. Surround Circuits This model incorporates a surround processor circuit. Fig. 1 is a block diagram of the surround processor circuit. The microprocessor transfers the data to the Dolby Pro-Logic decoder and Time Delay Device to operate the circuits in each mode.
  • Page 14 Dolby Pro-Logic A/V Receiver JSR-400 Ò 2) DOLBY PRO-LOGIC CIRCUIT Dolby Pro-Logic is a sound effect system for movies developed by the Dolby Laboratories Licensing Corp. IC10 (NJW1102) is a Dolby Pro-Logic decoder IC. When an audio signal recorded using the Dolby Pro-Logic system is sent to this IC, the left, right, center and surround components are separated.
  • Page 15 Dolby Pro-Logic A/V Receiver JSR-400 Ò 4) TEST TONE GENERATOR The test tone generator generates a test tone (noise) to check the balance of sound output from each speaker in the Dolby Pro-Logic mode. (This circuit is produced under license of the Dolby Laboritories Licensing Corp.) The test tone to the loudspeakers at 2 second intervals in the following sequence: Left, Center, Right, Rear (both rear channels).
  • Page 16 Dolby Pro-Logic A/V Receiver JSR-400 Ò 2) VCO VS. FM BAND FREQUENCY CURVE. 87.5 89.5 91.5 93.5 95.5 97.5 99.5 101.5 103.5 105.5 107.5 FM Band Frequency (MHz) 3) VCO VS. AM BAND FREQUENCY CURVE. 520 600 700 800 900 1000 1100 1200 1300 1400 1500 1600...
  • Page 17 Dolby Pro-Logic A/V Receiver JSR-400 Ò JSR400 PACKING ATTACHED WITH CELLOPHANE TAPE PARTS NO. PARTS NAME QT'Y MASTER CARTON 6121-000-421 POLY SHEET 6132-000-060 CUSHION SIDE 6161-000-140 2163-000-020 CORD PIN CORD RCA 2163-000-010 AM LOOP ANTENA 6457-000-010 6452-000-020 ANT. FM BAG PE...
  • Page 18 ADAPTIVE MATRIX NJW1102 S-CH MUTE VIDEO IN VIDEO from CPU PROTECT MUTE MONITOR 6dB AMP DIGITAL 0.83dB 19.3dB REAR AMP DELAY NJU9702 REAR SPEAKER JSR-400 BLOCK DIAGRAM JSR-400 PAGE 18 - 1 of 2 JSR-400 PAGE 18 - 2 of 2...
  • Page 19 VIDEO BY-PASS TONE AMP BUFFER 14.5dB VIDEO LC4966 C-CH DOLBY PRO-LOGIC 2.92dB 6dB AMP ADAPTIVE MATRIX NJW1102 S-CH VIDEO IN VIDEO from CPU MONITOR 6dB AMP DIGITAL 0.83dB DELAY NJU9702 JSR-400 BLOCK DIAGRAM JSR-400 PAGE 18 - 1 of 2...
  • Page 20 TONE AMP SPEAKER 14.5dB SUB WOOFER MUTE PROTECT C-CH Y PRO-LOGIC CENTER 2.92dB 19.3dB CENTER AMP SPEAKER TIVE MATRIX JW1102 S-CH MUTE PROTECT MUTE DIGITAL 0.83dB 19.3dB REAR AMP DELAY NJU9702 REAR SPEAKER JSR-400 PAGE 18 - 2 of 2...

  • Page 21: Specifications

    A6063-T5, PIN TYPE 1721-104-030 1721-104-040 VOLUME ROTARY RK14K1280307 100KC X2 W/BUSHING LG 6234-001-108 LABEL MADE IN CHAINA 1671-000-013 SWITCH TACT SW TACT KPT1105AM-1 4PIN 5351-000-900 BADGE JSR-400 PAGE 19 - 1 of 2 JSR-400 PAGE 19 - 2 of 2...
  • Page 22 JK6 1531-000-021 TERMINAL SPEAKER 8P JW-5508A, JAEWON JK7 1531-000-002 TERMINAL ANTENNA 4P JW-5540D,JAEWON J B L PARTS CODE 5636-130-080 5636-140-040 5636-140-080 5636-140-060 5636-140-030 5636-140-010 5636-140-130 5636-140-020 5541-001-030 5541-001-040 5541-001-010 5541-001-020 1723-503-002 1721-104-030 1721-104-040 1671-000-013 JSR-400 PAGE 19 - 1 of 2...
  • Page 23 HEAT SINK. PIN RK14K1280307 100KMNX2 W/BUSHING LG A6063-T5, PIN TYPE 1721-104-030 VOLUME ROTARY VOLUME ROTARY RK14K1280307 100KC X2 W/BUSHING LG 6234-001-108 LABEL MADE IN CHAINA 1721-104-040 SW TACT KPT1105AM-1 4PIN 5351-000-900 BADGE 1671-000-013 SWITCH TACT JSR-400 PAGE 19 - 2 of 2...

  • Page 24: Jsr-400 Electrical Parts Lists

    Dolby Pro-Logic A/V Receiver JSR-400 Ò JSR-400 ELECTRICAL PARTS LISTS Ref # Part # Description Ref # Part # Description ASS’Y-PCB MAIN JSR-400 R83, 84 1744-183-731 R-CARBON TAP 1/4W 18K W ± R-CARBON TAP 1/4W 68K W ± 1744-683-731 Ref #...
  • Page 25 PCB ASSY A0112-002-151-3 MAIN PCB FULLY LOADED Integrated Circuits 1212-782-025 LC7821 FUNCTION SELECTOR IC2, 3 1211-419-001 IC-SIP STK4192II HIGH POWER AMP ASS’Y PCB CONTROL JSR-400 SANYO IC4, 13 1212-455-001 IC-DIP NJM4558DD OP AMP JRC Transistors 1212-496-001 QUAD BILATERAL SWITCH 1243-319-001...
  • Page 26 1832-103-483 C-CERA/AX TAP 16V Y5S 0.01uF ± 20% 1 C-ELEC/RA TAP 5*11 16V 47uF ± 20% 5 C103, 317, 419, 1862-470-404 421, 428 ASS’Y-PCB TUNER JSR-400 C104, 302, 303, 1832-223-001 C-CERA/AX TAP 25V Y5V 307, 308, 312, 0.022uF +80%, -20%...
  • Page 27 KST-F701VA-3 KWANGSUNG PCB ASSY A0112-001-1620 HEADPHONE PCB FULLY LOADED F101, 102 1321-000-0051 FILTER-CERAMIC SFE10.7MA5-A(RED) CQ F202 1321-000-0200 FILTER-CERAMIC :A450BL TOKO ASS’Y PCB POWER SUPPLY JSR-400 F401 1341-000-0151 FIL-RESONATOR ZTB456F11CQ 1341-000-060 FIL-RESONATOR LZU450C4N CQ Transistor 1352-000-015J X-TAL HC-49/U 7.2MHZ 20PPM CQ 1243-319-001...
  • Page 28 PCB ASSY A0112-001-1618 TONE PCB FULLY LOADED 2111-023-005 CON-WAFER 5267-05A 5P P=2.5 MOLEX 2111-026-004 CONNECTOR-WAFER 4P P=3.96 ASS’Y PCB VOLUME JSR-400 35313-0410 MOLEX 2111-026-002 CONNECTOR-WAFER 2P P=7.92 35328-0210 MOLEX Resistors 2111-026-002J CONNECTOR-WAFER 2P P=7.92 1744-4R7-731 R-CARBON TAP 1/4W 4.7 W ±...

  • Page 29: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò Ref # Part # Description R-CARBON TAP 1/8W 100K W ± R1, 20 1742-104-721 R-CARBON TAP 1/8W 75 W ± R21-23 1742-750-721 R-CARBON TAP 1/8W 1M W ± 1742-105-721 R26, 27, 34, 36 1742-122-721 R-CARBON TAP 1/8W 1.2K W ±...

  • Page 30: Simple Troubleshooting

    Dolby Pro-Logic A/V Receiver JSR-400 Ò SIMPLE TROUBLESHOOTING Symptom Cause and Remedy If there is no sound from any of Make sure the receiver is plugged into an active AC wall outlet. the speakers, check the following: Push “Speakers” button on the receiver.

  • Page 31: More Complex Troubleshooting

    Dolby Pro-Logic A/V Receiver JSR-400 Ò MORE COMPLEX TROUBLESHOOTING Symptom Cause and Remedy Receiver inoperative A) Faulty AC power cord. (FL indicator does not light) Replace. B) Defective power switch. Replace. C) Broken wire in the power transformer. Replace the power transformer.

  • Page 32: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò Symptom Cause and Remedy FM volume not sufficient. A) If volume from both L and R channels is not loud enough: Front end section defective. “Faulty IC3, Coil T4" Defective C412 on Tuner Board. If sound of one channel is not loud enough: “Defective Q401, Q402"...

  • Page 33: Tuner Alignment

    Dolby Pro-Logic A/V Receiver JSR-400 Ò TUNER ALIGNMENT Test Equipment Required 1) AM/FM Signal Generator 2) Digital Multimeter FM Tuner Section Connect the FM signal generator (FM SG) to the FM antenna a 300W terminal through a 300W dummy antenna.

  • Page 34: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò ANT1 TUNER PCB ALIGNMENT LOCATIONS...

  • Page 35: Jsr-400 Main Pcb

    Dolby Pro-Logic Ò A/V Receiver JSR-400 JSR-400 MAIN PCB JSR400 MAIN PCB JSR-400 PAGE 31 - 1 of 2 JSR-400 PAGE 31 - 2 of 2...

  • Page 36: Jsr-400 Control Pcb

    Dolby Pro-Logic A/V Receiver JSR400 Ò JSR-400 CONTROL PCB JSR400 Control PCB JSR-400 PAGE 32 - 1 of 2 JSR-400 PAGE 32 - 2 of 2...

  • Page 37: Main Pcb

    JSR400 MAIN PCB JSR-400 PAGE 31 - 1 of 2...
  • Page 38 JSR-400 PAGE 31 - 2 of 2...
  • Page 39 JSR400 Con JSR-400 PAGE 32 - 1 of 2...
  • Page 40 JSR400 Control PCB JSR-400 PAGE 32 - 2 of 2...

  • Page 41: Jsr-400 Tuner Pcb

    Dolby Pro-Logic A/V Receiver JSR-400 Ò JSR-400 TUNER PCB JSR400 Tuner PCB...

  • Page 42: Jsr-400 Sub Pcbs

    Dolby Pro-Logic A/V Receiver JSR400 Ò JSR-400 SUB PCBs JSR400 SUB PCBs JSR-400 PAGE 34 - 1 of 2 JSR-400 PAGE 34 - 2 of 2...
  • Page 43 JSR400 SUB PCBs JSR-400 PAGE 34 - 1 of 2...
  • Page 44 JSR-400 PAGE 34 - 2 of 2...

  • Page 45: Wiring Diagram

    Dolby Pro-Logic A/V Receiver JSR-400 Ò WIRING DIAGRAM...

  • Page 46: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò INTEGRATED CIRCUIT DIAGRAMS 1 Main PCB IC10 - (NJW1102) D/S DECODER OUTPUTS Input Left Adaptive Auto- Matrix Right balance Control Center/ Trimmer Center Operating L Input Mode Control By-pass Line Trimmer Surround R Input...

  • Page 47: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò INTEGRATED CIRCUIT DIAGRAMS 2 Tuner PCB IC2 - (LM7001) (PLL Synthesizer and Controller) Phase Detector Charge Pump Reference Divider XOUT FMIN VDD1 Programable Divider VDD2 AMIN Shift Register - Latch CE CL DATA Terminal Description Pin No.

  • Page 48: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò INTEGRATED CIRCUIT DIAGRAMS 3 Main PCB IC11 - (NJU9702) D/S DELAY LPF1IN LPF1OUT OP1OUT OP1IN OC2 OP2IN OP2OUT LPF2IN LPF2OUT DIGITAL V ANALOG V OSCILLATOR INPUT LPF1IN 4.7k 4.7k OSCILLATOR OUTPUT LPF1OUT OP1OUT LPF1...

  • Page 49: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò INTEGRATED CIRCUIT DIAGRAMS 4 Main PCB - IC2, 3 (STK4192) Video PCB IC3 2 CH HIGH POWER AMP(50W+50W) (TA7291S) Motor driver TR15 OUT1 TR17 TR18 TR16 PROTECTOR TR13 TR12 OUT2 TR19 TR20 TR14 IN 1...

  • Page 50: Receiver

    Dolby Pro-Logic A/V Receiver JSR-400 Ò INTEGRATED CIRCUIT DIAGRAMS 5 Tuner PCB IC4 - (LA3410) FM IPX Main PCB - IC1 (LC7821) FUNCTION SELECTOR 11 10 PHASE LAMP COMPARATOR DRIVER LAMP VCO STOP TRIGGER LCOM1 RCOM1 STEREO SWITCH LCOM2 RCOM2...

  • Page 51: Transistor Diagrams

    Dolby Pro-Logic A/V Receiver JSR-400 Ò TRANSISTOR DIAGRAMS PNP (KRA101M) NPN (KTD1302) PNP (KTA1266-GR) (KRA103M) (KTC3198-GR) (KTC3192-0) (KTC3200-GR) NPN (KRC103M) N-FET (2SK117-GR)

  • Page 52: Receiver

    Dolby Pro-Logic Ò A/V Receiver JSR-400 JSR-400 SCHEMATIC DIAGRAM - MAIN BOARD JSR-400 PAGE 42 - 1 of 4 JSR-400 PAGE 42 - 2 of 4 100P AUX/TV TO CN3 TO CN9 100P R160 C142 0.42/50 47/16 47/16 100K JACK13...

  • Page 53: Receiver

    VIDEO TAPE SW29 SW33 SW30 SW36 SW44 SPEAKER CENTER PROLOGIC TUNER TUNING UP SW19 SW34 SW31 SW41 SW43 POWER ON/OFF TEST TONE 3 STEREO TUNING DOWN JSR-400 PAGE 43 - 1 of 2 JSR-400 PAGE 43 - 2 of 2...

  • Page 54: Receiver

    Dolby Pro-Logic Ò A/V Receiver JSR-400 JSR-400 SCHEMATIC DIAGRAM - POWER SUPPLY/VIDEO/TONE/HEADPHONE/VOLUME PCB’s JSR-400 PAGE 44 - 1 of 4 JSR-400 PAGE 44 - 2 of 4 VOLUME PART TO WA11 33/16 2SK117 VCR IN TA72915 KTA1266 47/16 47/16 1.2K 5.4V...

  • Page 55: Receiver

    R401 R206 L202 0.15u 3.3uH FM ADJ. 3.3/50 7.2MHz C203 C405 2.2/50 VR302 R418 R411 3 4 5 6 9 10 JSR-400 TUNER BOARD SCHEMATIC DIAGRAM JSR-400 PAGE 45 - 1 of 2 JSR-400 PAGE 45 - 2 of 2...
  • Page 56 JSR-400 PAGE 42 - 1 of 4 100P AUX/TV TO CN3 TO CN9 100P 47/16 47/16 100K JACK13 C802 4.7/50 100000P 4.7/50 VIDEO L VIDEO R 100P 100K NJM4558 VIDEO IN 100P 100K R402 FORM CN 4 100K R401 4.7/50...
  • Page 57 JSR-400 PAGE 42 - 2 of 4 TO CN3 TO CN9 C142 R160 0.42/50 R154 R156 C144 0.47/50 0.7UH C140 10/50 47/16 R152 IC3A REAR L STK4192 IC13 100P NJM4558DD R403 4 OHM SPEAKERS -1.4 C138 C908 REAR R R157 47/16 0.047u...

  • Page 58: Receiver

    CAUTION THE PARTS IDENTIFIED WITH THE IEC SYMBOL MARKS ARE CRITICAL FOR SAFETY. REPLACE ONLY WITH TYPE IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT OR SPECIFIED IN THE “PARTLIST” DO NOT DEGRADE THE SAFETY OF THE APPLIANCE THROUGH IMPROPER SERVICING. JSR-400 PAGE 42 - 3 of 4...
  • Page 59 33/50 100/50 1.5K 1W IC 5V 3.3K R500 R134 1N4002 R130 5.6K KRU 602 A1266 +38V 47/50 C3198-GR 3.3K C800 R133 6800/50 C801 6800/50 100P -38V L OUT JSR-400 MAIN BOARD SCHEMATIC DIAGRAM JSR-400 PAGE 42 - 4 of 4...
  • Page 60 SW37 AUTO HALL SW35 SW40 SW38 BYPASS VIDEO TAPE SW29 SW33 SW30 SW36 SW44 SPEAKER CENTER PROLOGIC TUNER TUNING UP SW19 SW34 SW31 SW41 SW43 POWER ON/OFF TEST TONE 3 STEREO TUNING DOWN JSR-400 PAGE 43 - 1 of 2...
  • Page 61 J41(JUMPER), J43(56K) : KOREA D102 J40(JUMPER), J41(JUMPER) : USA 1N4148 TUNER OPTION AC AC CN101 HOLD -27V R7 4.7(1/4W) AC5V AC5V SW37 SW38 TAPE SW36 SW44 TUNER TUNING UP SW41 SW43 TUNING DOWN JSR-400 PAGE 43 - 2 of 2...
  • Page 62 JSR-400 PAGE 44 - 1 of 4 33/16 2SK117 VCR IN KTA1266 1.2K 5.4V 100K 470/10 15V R51 VCR REC VCR CPU TO WA9 4.1V 1.2K VIDEO CPU 2.5V VIDEO IN 47/16 100/10 JACK2A 8.2K 1.2K KTA1266 47/16 0.1u 470/10 MONITOR 1.2K...
  • Page 63 JSR-400 PAGE 44 - 2 of 4 VOLUME PART TO WA11 TA72915 47/16 47/16 47/16 47/16 5.6K 47/16 -15V L G R 47/16 MOTOR 100/10V 100/10V L G R VO UP 4.7/50 VO DO 4.7/50 100K 50KA NJM4558DD -15V 100K REAR 4.7/50...
  • Page 64 + 15V 1N4002L - 15V 1N4002L 10(1W) CN77 -15V -25V 22/16 2200/25V 1N4002L 7915 POWER TRANSFORMER 47/35V 1N4002L HOLD 5V 47/35V -27V 1N4002L 47/35V 100K TO CONTROL AC 5V AC 5V POWER SUPPLY PART JSR-400 PAGE 44 - 3 of 4...

  • Page 65: Receiver

    MARKS ARE CRITICAL FOR SAFETY. REPLACE ONLY WITH TYPE IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT OR SPECIFIED IN THE “PARTLIST” DO NOT DEGRADE THE SAFETY OF THE APPLIANCE THROUGH IMPROPER SERVICING. JSR-400 POWER BOARD SCHEMATIC DIAGRAM JSR-400 PAGE 44 - 4 of 4...
  • Page 66 KTC3200 R207 R203 22 1/4 2.5V 2.2V 3.3K Q202 XOUT C204 2SK-246Y 2.2V C322 R206 L202 0.15u 3.3/5 3.3uH FM ADJ. 7.2MHz C203 VR302 1 2 3 4 5 6 9 10 JSR-400 JSR-400 PAGE 45 - 1 of 2...
  • Page 67 LPU450B R305 KRA101M R406 C402 1.8K VR301 T2 AM IF T 0.47/50 R304 Q401 C404 KTC3198 3.3/50 C322 R401 0.15u 3.3/50 FM ADJ. C405 2.2/50 VR302 R418 R411 JSR-400 TUNER BOARD SCHEMATIC DIAGRAM JSR-400 PAGE 45 - 2 of 2...

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