NSX-R71 EZ(S) SERVICE MANUAL CD STEREO SYSTEM BASIC TAPE MECHANISM : 6ZM-3 PR4NM BASIC CD MECHANISM : BZG-5 ZD5GNDM SYSTEM CD CASSEIVER SPEAKER REMOTE CONTROLLER NSX-R71 CX-NR71 SX-NR70 RC-CAS01 If requiring information about the CD mechanism, see Service Manual of BZG-5 ZD5GNDM, (S/M Code No. 09-023-353-3NC). S/M Code No.
TABLE OF CONTENTS -1/1 SPECIFICATIONS ............................................................................................................................................................... 3 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING ...................................................................... 4 NOTE ON BEFORE STARTING REPAIR ................................................................................................................... 5, 6 ACCESSORIES PARTS LIST ............
SPECIFICATIONS -1/1 MAIN UNIT CX-NR71 TUNER FM tuning range FM usable sensitivity (IHF) FM antenna terminal MW tuning range MW usable sensitivity LW tuning range LW usable sensitivity MW/LW antenna AMPLIFIER Power output Total harmonic distortion Input Outputs CASSETTE DECK Track format Frequency response Recording system Heads 87.5 MHz to 108 MHz 16.
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING -1/1 CAUTION This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing. Use of controls or adjustments or performance of procedures other than those specified herin may result in hazardous radiation exposure. WARNING!! WHEN SERVICING, DO NOT APPROACH THE LASER EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMISSION.
NOTE ON BEFORE STARTING REPAIR -1/2 1. Forced discharge of electrolytic capacitor of power supply block When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across the electrolytic capacitors (C101, 102) even though AC power cord is removed. If repair is attempted in this condition, secondary defect can occur. In order to prevent the secondary trouble, perform the following measures before starting repair work.
NOTE ON BEFORE STARTING REPAIR -2/2 In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has any abnormalities or not. M IC RO CO M PU TE R 2-2. Regarding reset There are cases that the machine does not work correctly because the MICROCOMPUTER is not reset even though the AC power cord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.
ACCESSORIES PARTS LIST -1/1 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 1/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 2/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 3/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 4/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 5/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 6/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 7/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 8/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 9/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 10/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 11/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 12/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 13/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 14/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 15/16 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
ELECTRICAL PARTS LIST - 16/16 • Regarding connectors, they are not stocked as they are not the initial order items. The connectors are available after they are supplied from connector manufacturers upon the order is received. CHIP RESISTOR PART CODE Chip Resistor Part Coding 8 8 A Figure Resistor Code Value of resistor Chip resistor L W t :A Resistor Code : A 1.0 0.5 0.
TRANSISTOR ILLUSTRATION -1/1 E C B B C E 2SB1548 2SB1686 2SD2642 2SA1980G 2SA1981Y 2SC3331(T/U) 2SA1296GR E C B SD G G D S 2SK3053 2N5551C S D 2SJ460 2SK2541 C D B G G 2SK360E E C B E C B E S 2SK2158 2SA1235F 2SC2620B 2SC3052F 2SC3906KR 2SC5345SF/S(O) 2SD1306E -24- DTC114YKA KRA102S SBT5401 SBT5551 SRA2202S SRA2207S 2SC5343GL
SCHEMATIC DIAGRAM - 1/5 (MAIN -1/2, AMP SECTION) -25-
SCHEMATIC DIAGRAM - 2/5 (MAIN -2/2, TUNER SECTION) Q902 L901,902,904,905 Q901 MAIN C.B 2/2 (TUNER SECTION) 1 D 3 G S 6 4 C916 0.01 Q903-905 L801 L802 AM IF ADJ. 7.81V Q835 FM IF AMP Q836 FM BAND SW ON:7.68V OFF:0V 5.62V JR 1N4148M ANTENNA MS2 GH-A SFE10.7 6.9V FM75 (COAXIAL) 0.01 270 6.8K MW/LW LOOP PCFJZH-450L R790 0.01 1N4148M JR 22/50 1N4148M C984 0.01 25 KB 0.01 25 KB 11.33V C991 C788 5P C782 7.81V 12.
R243 R244 R245 R246 R265 R266 TO MAIN C.
SCHEMATIC DIAGRAM - 4/5 (FRONT/DECK/CD-LED SECTION) FRONT C.B -26.3 -26.3 DC:-17.26 AC:2.01VAC -26.3 -26.3 -26.3 R701 R702 D701 5.15 PTY AG S349 S348 R350 3.3K R349 2.7K 10.8/0 1N4148M R348 1.8K 5.15 1N4148M RT S350 RDS SKQNAB(N) S350 10.8/0 10.8/0 12.04 DC:-17.26 AC:2.01VAC 12.04 1N4148M -26.3 10.8/0 10.8/0 10.8/0 P15 10.8/0 10.8/0 10.8/0 10.8/0 10.8/0 10.8/0 10.8/0 AM10K LW D981 1N4148M P17 D983 1N4148M 5.15 12.04 10.8/0 5.0 5.08/0 5.08/0 5.
WIRING - 2/4 (FRONT C.B / CD-LED C.
WIRING - 3/4 (DECK C.B / HEAD-1 C.B) 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A TO FRONT C.B CN104 (CAM2) (CST2) (FFC104) (REA) (CAM1) B (CST1) C 1 11 D 10 2 CN1 1 1 3 3 IC2 IC1 E F G CRD1 HEAD-1 C.B H I DECK-2 J K CNA301 DECK C.B L M TO MAIN CB CN301 N O P Q R S T CNA302 PH DECK 1 TO MAIN C.
SCHEMATIC DIAGRAM -5/5 (PT SECTION) PT,CNF-6 EZ WH081 AC36.4V AC17.5V 0/5.0V AC2.3V C085 0.1 RY081 RELAY,AC12V D083 PT081 PT,SUB BMA E (VRK) F081 DC11.4V TO MAIN C.B 1/2 (AMP SECTION) WH001 VIA W099 PT C.
WIRING - 4/4 (PT C.B) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A PT C.B B C D C085 E PT001 8 17 F G H 9 (W099) I J 1 TF K 7 1 L D082 D083 M RY081 PT081 N 1 T082 T081 F081 TO MAIN C.
ELECTRICAL ADJUSTMENT -1/7 16 MAIN C.B 7 1 5 (PARTS SIDE) TC942 L802 L941 6 L942 L953 L952 L901 L907 SFR452 SFR451 L902 9 L905 L904 3 5 6 J203 7 9 10 MAIN C.B (PATTERN SIDE) 24 IC801 4 GND TP8 L R962 G 1 2 3 15 16 17 18 19 VT TP9 R RPH PH DECK C.
ELECTRICAL ADJUSTMENT -2/7 1. VT Check (MW) Requirements • Measuring instrument: Digital multimeter Test points: VT, GND 1) Connect the digital multimeter between VT and GND. 2) Set the function to MW, and tune the receiving frequency of the unit at 1,602 kHz. 3) Check that the digital multimeter ranges under 8 V. 4) Tune the receiving frequency of the unit at 531 kHz. 5) Check that the digital multimeter ranges above 0.5 V. 2. VT Adjustment (LW) Requirements: Same as above.
ELECTRICAL ADJUSTMENT -3/7 Make the following preparations for MW/LW adjustment. Preparations • Standard Signal Generator (S.S.G.) / Loop antenna / Oscilloscope / Millivoltmeter / Dummy resistance (6Ω) 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Position the loop antenna connected to S.S.G. and the one connected to the unit 60 cm apart. 5. Tracking Adjustment(LW) Requirements: As instructed in preparations. • Adjustment point: L941/TC942 1) Set S.S.G.
ELECTRICAL ADJUSTMENT -4/7 Make the following preparations for FM adjustment. Preparations • Standard Signal Generator (S.S.G.) / Loop antenna / Oscilloscope / Millivoltmeter / Dummy resistance (6Ω) 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Connect the output of S.S.G. to the antenna input of the unit. 9. Tracking Adjustment Requirements: As instructed in preparations. • Adjustment point: L901/L902/L904/L905 1) Set S.S.G.
ELECTRICAL ADJUSTMENT -5/7 12. Tape Speed Adjustment (DECK 2) Requirements • Measuring instrument: Wow and flutter meter (frequency counter) Test tape: TTA-100 (3 kHz) Test point: HP OUT Adjustment point: SFR1 1) Connect the wow and flutter meter to HP OUT of the unit. 2) Insert the test tape (TTA-100) to DECK 2. Play back the middle part of the tape, and adjust SFR1 so that the level 3,000 Hz ± 5 Hz is monitored. 13. Tape Speed Check (DECK 1) Requirements: Same as the above, 12.
ELECTRICAL ADJUSTMENT -6/7 17. Playback Sensitivity Check (DECK 1 and DECK 2) Requirements • Measuring instrument: Millivoltmeter Test tape: TTA-200 (400 kHz) Test points: TP8 (Lch), TP9 (Rch) 1) Connect CH1 of the millivoltmeter to TP8 (Lch) and CH2 to TP9 (Rch). 2) Insert the test tape (TTA-200) to DECK 1 and play back. 3) Check that the output level is ranged within 140 mV ± 3 dB. 4) Apply the above steps, 2) and 3) to DECK 2. 18.
ELECTRICAL ADJUSTMENT -7/7 FRONT C.B PATTERN SIDE CLOCK GND 20 FRONT C.B PARTS SIDE 20 L951 20. Clock Adjustment Requirements • Measuring instrument: Frequency counter Test point: CLOCK, GND Adjustment point: L951 1) While pressing the FF and POWER button, insert the AC plug to the outlet. 2) Adjust L951 so that the frequency counter indicates the frequency level within 84.804 ± 0.085 Hz.
CD TEST MODE -1/1 CD TEST MODE Ver. 3.0 1. Starting CD Test Mode While pressing and holding down the CD OPEN/CLOSE button, insert the AC plug to outlet. When test mode starts, the message, TEST appears on the display. 2. Exiting CD Test Mode Press the other function key, POWER button or remove the AC plug from outlet. 3. Function of CD Test Mode No Mode Function Key Display Check FL check Microcomputer check 1 Start Mode 2 Search Mode STOP button READING LD constantly lit.
LCD DISPLAY -1/2 GRID ASSIGNMENT -42-
LCD DISPLAY -2/2 ANODE CONNECTION PIN CONNECTION -43-
IC DESCRIPTION -1/1 (µPD780228-081-3BA) -1/2 Pin No. Pin Name I/O Description 1 O-MOTOR O DECK MOTOR output. 2 O-SOL1 O DECK SOL1 output. 3 O-SOL2 O DECK SOL2 output. 4 O-LED_STB O STB output for shift registor. 5 O-MUTE O MUTE output. 6 O-KSCAN O Initial scan output. 7 O-PLL_CE O TUNER chip enable output. 8 I-TM_BASE I Reference clock input for clock. (8Hz) 9 I-FUNC_A I Rotary encoder input function A. 10 I-FUNC_B I Rotary encoder input function B.
IC DESCRIPTION -1/1 (µPD780228-081-3BA) -2/2 Pin No. Pin Name I/O Description 43 I-CDSW I CD mechanism SW input. 44 I-SPEANA_1 I Input spectrum analyzer DATA (Low Frequency). 45 I-SPEANA_2 I Input spectrum analyzer DATA (Middle Frequency). 46 I-SPEANA_3 I Input spectrum analyzer DATA (High Frequency). 47 I-KEY1 I Key input 1. 48 I-KEY2 I Key input 2. 49 I-TU_SIG/(I-MIC) I Signal LEVEL A/D input for RDS / MIC Input for auto vocal fader.
MECHANICAL EXPLODED VIEW -1/1 41 A A 54 A A 47 64 21 59 39 40 38 A G 20 G A E 67 D 19 63 58 37 66 H 25 42 G 26 45 23 18 G 61 F G G B I 22 65 27 I 62 B 35 53 36 60 17 B 57 33 28 34 14 C 13 12 16 48 15 29 F 10 G 24 11 30 43 G A 44 31 49 52 5 9 2 4 51 31 1 53 50 30 32 55 3 6 52 46 8 51 7 A 56 50 -47-
MECHANICAL MAIN PARTS LIST -1/1 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
COLOR NAME TABLE -1/1 Basic color symbol Color Basic color symbol Color Basic color symbol Color B Black C Cream D Orange G Green H Gray L Blue LT Transparent Blue N Gold P Pink R Red S Silver ST Titan Silver T Brown V Violet W White WT Transparent White Y Yellow YT Transparent Yellow LM Metallic Blue LL Light Blue GT Transparent Green LD Dark Blue DT Transparent Orange GM Metallic Green YM Metallic Yellow DM Metallic Orange PT Transparent Pink LA Aqua Blue GL Light Green HT Transparent Gray HM Metallic Gra
TAPE MECHANISM EXPLODED VIEW -1/1 <6ZM-3 PR4NM> 26 25 45 F 40 31 G B H 44 A 29 24 62 46 61 51 35 32 LVR EJECT L 43 36 27 37 42 34 59 A 47 32 52 41 23 e 38 33 30 53 58 28 C J L 22 30 33 J 56 e 47 34 36 b 14 35 48 31 41 D 21 55 58 a 27 b 63 57 K d c a 38 LVR EJECT R GEAR PLAY 9 3 4 10 13 2 7 7 11 8 4 1 4 12 49 9 39 15 10 54 2 11 GEAR PLAY 6 13 3 16 17 c 5 I 50 d 12 E 4 6 18 54 60 19 8 64 20 -50- 50 I
TAPE MECHANISM PARTS LIST -1/2 <6ZM-3 PR4NM> ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
TAPE MECHANISM PARTS LIST -2/2 <6ZM-3 PR4NM> ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) -1/1 Type.1 Type.4 TOOLS Insert a flat-bladed screwdriver into the position indicated by the arrows and remove the panel. Remove the screws of each speaker unit and then remove the speaker units. 1 2 3 1 2 Plastic head hammer ( ) flat head screwdriver Cut chisel 3 How to Remove the PANEL, FR Type.2 Remove the grill frame and four pieces of rubber caps by pulling out with a flat-bladed screwdriver.
SPEAKER PARTS LIST -1/1 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
OTHER PARTS LIST -1/2 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers. Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers.
OTHER PARTS LIST -2/2 ! C = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
2-11, IKENOHATA 1-CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111 0251431