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Pioneer XR-A670 Service Manual
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Pioneer XR-A670 Service Manual

Pioneer XR-A670 Service Manual

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See also: Operating Instructions
STEREO CD CASSETTE DECK RECEIVER
XR-A670
XR-A370
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
Type
XR-A670
MYXJ
NVXJ
KUCXJ
CONTENTS
1. SAFETY INFORMATION ....................................... 2
4. PCB CONNECTION DIAGRAM ........................... 32
5. PCB PARTS LIST ................................................ 47
6. ADJUSTMENT ..................................................... 57
PIONEER CORPORATION
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
c
PIONEER CORPORATION 1999
Power Requirement
XR-A370
AC220-230V
AC230V
AC120V
4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
• XR-A670
7. GENERAL INFORMATION .................................. 67
7.1 DIAGNOSIS ................................................... 67
7.1.1 DISASSEMBLY ........................................ 67
7.2 PARTS ........................................................... 70
7.2.1 IC ............................................................. 70
7.2.2 DISPLAY .................................................. 72
ORDER NO.
RRV2188
Remarks
T - IZK SEPT. 1999 Printed in Japan

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  • Page 1: Table Of Contents

    PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936 PIONEER CORPORATION 1999 T –...

  • Page 2: Safety Information

    The use of a substitute replacement component which does Leakage 0.5mA current Device not have the same safety characteristics as the PIONEER tester under recommended replacement one, shown in the parts list in test this Service Manual, may create shock, fire, or other hazards.
  • Page 3 XR-A670, XR-A370 IMPORTANT LASER DIODE CHARACTERISTICS THIS PIONEER APPARATUS CONTAINS MAXIMUM OUTPUT POWER: 5 mW LASER OF CLASS 1. WAVELENGTH: 780 nm to 785 nm SERVICING OPERATION OF THE APPARATUS S H O U L D B E D O N E B Y A S P E C I A L L Y INSTRUCTED PERSON.

  • Page 4: Exploded Views And Parts List

    See Contrast table (2) Polyethylene Bag See Contrast table (2) XR-A670/MYXJ and XR-A370/MYXJ Only (2) CONTRAST TABLE XR-A670/MYXJ, NVXJ, KUCXJ, XR-A370/MYXJ, NVXJ and KUCXJ are constructed the same except for the following : Part No. Mark No. Symbol and Description Remarks XR-A670...
  • Page 5 XR-A670, XR-A370 2.2 EXTERIOR SECTION Refer to "2.4 $M MECHANISM CD-2". KUCXJ Except Type KUCXJ Type Note : Only Attatch on the same numbers × three. 38 or 44 MYXJ Type Only Except NVXJ Type XR-A670 Except Only KUCXJ Type...
  • Page 6 XR-A670, XR-A370 (1) EXTERIOR SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 AF Assy See Contrast table (2) Rear Panel See Contrast table (2) 2 PRIMARY Assy See Contrast table (2) Bonnet Case See Contrast table (2)
  • Page 7 XR-A670, XR-A370 (2) CONTRAST TABLE XR-A670/MYXJ, NVXJ, KUCXJ, XR-A370/MYXJ, NVXJ and KUCXJ are constructed the same except for the following : Part No. Mark No. Symbol and Description Remarks XR-A670 XR-A670 XR-A670 XR-A370 XR-A370 XR-A370 /MYXJ /NVXJ /KUCXJ /MYXJ /NVXJ...
  • Page 8 XR-A670, XR-A370 2.3 FRONT PANEL SECTION 35 or 36 XR-A670 Only 16 or 34 Refer to "2.6 MECHANISM UNIT".
  • Page 9 Cushion Leg A XEB3008 LED Cover See Contrast table (2) Screw BPZ30P080FMC (2) CONTRAST TABLE XR-A670/MYXJ, NVXJ, KUCXJ, XR-A370/MYXJ, NVXJ and KUCXJ are constructed the same except for the following : Part No. Mark No. Symbol and Description Remarks XR-A670 XR-A670...
  • Page 10 XR-A670, XR-A370 2.4 $M MECHANISM CD-2 Refer to "2.5 SERVO MECHANISM ASSY".
  • Page 11 XR-A670, XR-A370 (1) $M MECHANISM CD-2 PARTS LIST Mark No. Description Part No. Mark No. Description Part No. MOTOR Assy XWZ3230 Gear Pulley ANW7094 SW Assy XWZ3231 Lock Lever ANW7095 CD Assy See Contrast table (2) Planet Gear ANW7096 TRADE Assy...
  • Page 12 XR-A670, XR-A370 2.6 MECHANISM UNIT Mech. ΙΙ Mech. ΙΙ Only Only Mech. Ι Only Mech. Ι Mech. ΙΙ Mech. ΙΙ Mech. ΙΙ Only Mech. Ι...
  • Page 13 XR-A670, XR-A370 • • MECHANISM UNIT PARTS LIST MECHANISM UNIT PARTS LIST (XYM3010) (XYM3008 : XR-A370/KUCXJ) Mark No. Description Part No. Mark No. Description Part No. Plate HD BLK (Mech. ΙΙ) Plate HD BLK (Mech. ΙΙ) F513-847 F513-848 Plate HD BLK (Mech. Ι) Plate HD BLK (Mech.

  • Page 14: Block Diagram And Schematic Diagram

    XR-A670, XR-A370 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM and OVERALL WIRING DIAGRAM V5621 5901 FL TUBE DISPLAY ASSY (XR-A670/MYXJ, NVXJ : XWZ3215) IC5501 PDC057A (XR-A670/KUCXJ : XWZ3214) S5951 System Control (XR-A370/MYXJ, NVXJ : XWZ3210) 81 82 (XR-A370/KUCXJ : XWZ3209)
  • Page 15 IC2201 HA12136AF XR-A670 ONLY CN3331 CABLE HOLDER ASSY JA3441 POWER TRANSFORMER SUPPORT (XR-A670/MYXJ, NVXJ : XTS3031) CN3991 (XR-A670/KUCXJ : XTS3032) ASSY (XR-A370/MYXJ, NVXJ : XTS3016) (XR-A370/KUCXJ : XTS3017) CN11 PRIMARY ASSY (XR-A670/MYXJ, NVXJ : XWZ3213) (XR-A670/KUCXJ, XR-A370/KUCXJ : XWZ3224) SECONDARY ASSY...
  • Page 16 XR-A670, XR-A370 3.2 FM/AM TUNER MODULE (For MYXJ and NVXJ Types) MIX AMP RF AMP BUFFER IF AMP FM +B SW AM RF TUNING BLOCK...
  • Page 17 XR-A670, XR-A370 FM/AM TUNER MODULE (AXQ7068) AF AMP AF AMP CN6201 KP200IA14L REGULATOR...
  • Page 18 XR-A670, XR-A370 3.3 FM/AM TUNER MODULE (For KUCXJ Type) MIX AMP RF AMP 1T378A BUFFER IF AMP FM +B SW MW RF TUNING BLOCK AKX7041...
  • Page 19 XR-A670, XR-A370 FM/AM TUNER MODULE (AXQ7065) AF AMP AF AMP CN6201 REGULATOR KP200IA14L...
  • Page 20 XR-A670, XR-A370 3.4 CD, MOTOR, SW and TRADE ASSYS CD ASSY (XR-A670 : XWZ3233) (XR-A370 : XWZ3229) TRADE ASSY (XWZ3232) CN9001 S6B-PH-K-S SW ASSY (XWZ3231) J9501 D20PWY0610E CN9002 CN8002 SLW11R-1C7 SLW11R-1C7 CN9501 52147-0610 J9502 D20PWW0405E MOTOR ASSY CARRIAGE MOTOR (XWZ3230)
  • Page 21 XR-A670, XR-A370 : The power supply is shown with the marked box. (CD) : CD AUDIO SIGNAL ROUTE : SPINDLE MOTOR ROUTE : FOCUS SERVO LOOP LINE : CARRIAGE MOTOR ROUTE : TRACKING SERVO LOOP LINE : LOADING MOTOR ROUTE...
  • Page 22 XR-A670, XR-A370 3.5 AF ASSY (1/3) AF ASSY (XR-A670/MYXJ, NVXJ : XWZ3200) (PB) (XR-A670/KUCXJ : XWZ3199) : DECK PB SIGNAL ROUTE (REC) (XR-A370/MYXJ, NVXJ : XWZ3197) : DECK REC SIGNAL ROUTE (REC) (REC) (XR-A370/KUCXJ : XWZ3196) XR-A370 XR-A670 –3.7XR-A670 ONLY...
  • Page 23 XR-A670, XR-A370 XR-A370 (PB) (PB) (PB) ONLY (REC) (REC) (REC) BA4558F-HT XR-A670 ONLY BA4558F-HT (PB) 1SS355 (PB) (PB) (PB) (PB) (PB) (REC) (REC) (REC) (REC) (REC) (REC) XR-A670/ MYXJ, NVXJ ONLY XR-A670 ONLY 2/3,3/3 XR-A670 ONLY XR-A670 : The power supply is shown with the marked box.
  • Page 24 XR-A670, XR-A370 3.6 AF ASSY (2/3) AF ASSY (XR-A670/MYXJ, NVXJ : XWZ3200) (XR-A670/KUCXJ : XWZ3199) CN8204 (XR-A370/MYXJ, NVXJ : XWZ3197) (XR-A370/KUCXJ : XWZ3196) CN1052 52045-0845 MYXJ, NVXJ TYPES ONLY 0.056 (MYXJ,NVXJ) 0.1 (MYXJ,NVXJ) 0.068 (KUCXJ) 0.027 (KUCXJ) 0.56 (MYXJ,NVXJ) 0.47 (KUCXJ)
  • Page 25 XR-A670, XR-A370 CN6201 (MYXJ, NVXJ TYPES) CN6201 (KUCXJ TYPE) CN3051 KM200IB14 MYXJ, NVXJ TYPES ONLY MYXJ, NVXJ TYPES ONLY MYXJ, NVXJ TYPES ONLY MYXJ, NVXJ TYPES ONLY 3.9k (MYXJ,NVXJ) 4.7k (KUCXJ) BA4558F-HT (1/2) 3.9k (MYXJ,NVXJ) 4.7k (KUCXJ) BA4558F-HT (1/2) MYXJ, NVXJ...
  • Page 26 XR-A670, XR-A370 3.7 AF (3/3) and SECONDARY ASSYS STK407-100B (XR-A670) STK407-070B (XR-A370) IRF9540G (XR-A670) 1k (MYXJ, NVXJ) 56k (MYXJ, NVXJ) IRFI9Z34G (XR-A370) MYXJ, NVXJ 0 (KUCXJ) 68k (KUCXJ) TYPES ONLY 1SR139-100 D3302 1SR139-100 MYXJ, NVXJ TYPES ONLY R3515,R3516,R3517,R3518 1.5k (MYXJ, NVXJ) 1.2k (KUCXJ)
  • Page 27 RISK OF FIRE. REPLACE ONLY WITH SAME TYPE NO. 491010F MFD, BY LITTELFUSE INK. TYPE NO. 491007 MFD, BY LITTELFUSE INK. FOR IC11 AND IC12 (AEK7068: XR-A670). FOR IC21 AND IC22 (AEK7021: XR-A670). CAUTION : FOR CONTINUED PROTECTION AGAINST CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
  • Page 28 XR-A670, XR-A370 3.8 PRIMARY and SUB TRANS ASSYS XR-A670/ XR-A670/ XR-A670/ MYXJ, NVXJ MYXJ, NVXJ MYXJ, NVXJ ONLY ONLY ONLY EXCEPT XR-A670/ MYXJ, NVXJ XR-A670/ MYXJ, NVXJ ONLY (XR-A370/ MYXJ, NVXJ) (KUCXJ) EXCEPT XR-A670/ MYXJ, NVXJ EXCEPT XR-A670/ MYXJ, NVXJ...
  • Page 29 XR-A670, XR-A370 PRIMARY ASSY (XR-A670/MYXJ, NVXJ : XWZ3213) (XR-A670/KUCXJ, XR-A370/KUCXJ : XWZ3224) (XR-A370/MYXJ, NVXJ : XWZ3225) MYXJ, NVXJ TYPES • NOTE FOR FUSE REPLACEMENT CAUTION - FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY.
  • Page 30 XR-A670, XR-A370 3.9 DISPLAY ASSY DISPLAY ASSY (XR-A670/MYXJ, NVXJ : XWZ3215) (XR-A670/KUCXJ : XWZ3214) (XR-A370/MYXJ, NVXJ : XWZ3210) (XR-A370/KUCXJ : XWZ3209) XR-A670 SYSTEM CONTROL ONLY MYXJ, NVXJ TYPES ONLY XR-A670 ONLY XR-A670 KUCXJ ONLY TYPE ONLY XR-A670 300 (XR-A670) 390 (XR-A370)
  • Page 31 XR-A670, XR-A370 CN81 CN8201 2/3 CN5102 CN5501 52492-1920 CN5503 D20PYY0425E 52045-2545 52045-1745 (OTHERS) 52045-1545 (XR-A370/KUCXJ) KUCXJ TYPE ONLY EXCEPT CN2903 XR-A370 /KUCXJ XR-A670 ONLY 1SS181 MYXJ, NVXJ 1SS181 TYPES ONLY KUCXJ TYPE XR-A670 ONLY ONLY S5911-S5917, S5919-S5936 : XSG3001 S5911 : DISC 1 S5919 : CD S5926 : TAPEΙ/ΙΙ...

  • Page 32: Pcb Connection Diagram

    XR-A670, XR-A370 4. PCB CONNECTION DIAGRAM NOTE FOR PCB DIAGRAMS : 1. Part numbers in PCB diagrams match those in the schematic 3. The parts mounted on this PCB include all necessary parts for diagrams. several destinations. 2. A comparison between the main parts of PCB and schematic For further information for respective destinations, be sure to diagrams is shown below.
  • Page 33 XR-A670, XR-A370 4.2 FM/AM TUNER MODULE (For KUCXJ Type) CN3051 FM/AM TUNER MODULE VR6201 Q6203 Q6204 SIDE A FM/AM TUNER MODULE (ANP7159-B) Q6302 Q6303 Q6301 Q6202 Q6201 IC6201 Q6304 Q6401 Q6214 IC6202 Q6306 Q6403 Q6402 Q6404 Q6205 SIDE B...
  • Page 34 XR-A670, XR-A370 4.3 CD, MOTOR, SW and TRADE ASSYS CD ASSY IC8201 Q8351 Q8101 Q8353 IC8301 IC8101 Q8354 Q8352 SERVO MECHANISM ASSY CN5501 SW ASSY CN1052 TRADE ASSY SERVO MECHANISM ASSY MOTOR SIDE A ASSY (XNP3023-B) B C D E...
  • Page 35 XR-A670, XR-A370 CD ASSY Q8021 Q8404 Q8024 Q8203 Q8403 Q8401 Q8202 Q8356 Q8355 TRADE ASSY ASSY MOTOR ASSY SIDE B (XNP3023-B) B C D E...
  • Page 36 XR-A670, XR-A370 4.4 AF ASSY CN6201 (MYXJ, NVX MECHANISM UNIT Ι CN6201 (KUCXJ) AF ASSY CN11 VR2302 VR2 VR2802 VR2 Q3081 Q2083 Q2084 Q2801 IC32 IC51 IC42 Q3352 Q3351 IC330...
  • Page 37 XR-A670, XR-A370 MYXJ, NVXJ) CN8204 KUCXJ) CN5503 MECHANISM UNIT Ι MECHANISM UNIT ΙΙ SIDE A (XNP3022-B) VR2302 VR2301 VR2303-VR2306 VR2802 VR2801 IC2301 3351 IC3302 IC3301...
  • Page 38 XR-A670, XR-A370 AF ASSY SIDE B (XNP3022-B) IC5891 Q3621 Q2301 IC2101 IC5892 Q3605-Q3608 Q2302 Q2204 Q2203 Q2802 Q2306 Q3601 Q3603 Q3314 Q3313 IC2201 Q3503 IC3502 IC3501 Q3312 Q3311...
  • Page 39 XR-A670, XR-A370 IC2101 Q2102 Q2201 Q2202 Q5751 Q5752 IC5691 IC3001 Q2204 Q2203 Q2103 IC5751 IC3951 Q3501 Q3502 IC3101 Q3313 IC2201 Q2104 Q2801 Q2803-Q2807 Q3312 Q3311 Q3351-Q3354...
  • Page 40 XR-A670, XR-A370 4.5 SECONDARY and PRIMARY ASSYS PRIMARY ASSY POWER TRANSFORMER SECONDARY ASSY IC71 IC41 IC31 IC22 IC21 IC11 IC12 SIDE A (XNP3021-B)
  • Page 41 XR-A670, XR-A370 PRIMARY ASSY SECONDARY ASSY SIDE B (XNP3021-B)
  • Page 42 XR-A670, XR-A370 4.6 DISPLAY ASSY DISPLAY ASSY CN81 IC3901...
  • Page 43 XR-A670, XR-A370 MECHANISM UNIT CN5102 CN8201 (XNP3021-B) IC3931 SIDE A...
  • Page 44 XR-A670, XR-A370 DISPLAY ASSY (XNP3021-B) Q2903 Q2910 Q2901 Q5501 IC5501 Q2911 Q5622 Q5601-Q5603 Q5502 Q2904 Q2907 SIDE B...
  • Page 45 XR-A670, XR-A370 IC5501 Q5615-Q5620 Q5613 Q5801 Q5821 Q5604 Q5606...
  • Page 46 XR-A670, XR-A370 4.7 SUB TRANS ASSY SUB TRANS ASSY IC81 IC82 LIVE AC IN NEUTRAL (XNP3021-B) SIDE A SUB TRANS ASSY (XNP3021-B) SIDE B...

  • Page 47: Pcb Parts List

    XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. 5. PCB PARTS LIST • NOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. • mark found on some component parts indicates the importance of the safety factor of the part.
  • Page 48 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. AF ASSY (for XR-A670) XWZ3200 and XWZ3119 are constructed the same except for the following : Part No. Mark Symbol and Description Remarks XWZ3200 XWZ3199 IC5751 BU1923F Not used...
  • Page 49 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. AF ASSY (for XR-A370) XWZ3197 and XWZ3196 are constructed the same except for the following : Part No. Mark Symbol and Description Remarks XWZ3197 XWZ3196 IC5751 BU1923F Not used...
  • Page 50 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. SECONDARY ASSY XWZ3221 and XWZ3220 are constructed the same except for the following : Part No. Mark Symbol and Description Remarks XWZ3221 XWZ3220 IC11, IC12 AEK7068 (10A) AEK7047 7A)
  • Page 51 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. PCB PARTS LIST FOR XR-A670/MYXJ UNLESS OTHERWISE NOTED C6244 CEAS470M16 FM/AM TUNER MODULE (AXQ7068) C6249,C6250,C6265,C6266 CEAS4R7M50 C6258 CEJA470M16 SEMICONDUCTORS C6215 CFTLA103J50 IC6201 LA1832ML C6214 CFTLA224J50 IC6202 LC72131MD Q6102...
  • Page 52 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. F6401 FM BAND PASS FILTER ATF-155 CD ASSY F6206 FM CERAMIC DISCLI. ATF7008 F6202 AM CERAMIC FILTER ATF7011 SEMICONDUCTORS L6206,L6208,L6403 LAU2R2J IC8301 BA5970FP IC8101 CXA1821M TRANSFORMERS IC8201 CXD2587Q...
  • Page 53 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. 1SS133 MOTOR ASSY D2102,D2103,D2201,D2202,D3051 1SS355 D63,D64 1SS355 SWITCH D3355,D3356 20E2-FC S9503 ASG7009 D3083 MTZJ11C MTZJ12C OTHERS D35,D36 MTZJ15C J9502 JUMPER WIRE 4P D20PWW0405E D3359,D3360 MTZJ18B MOTOR PULLEY PNW1634...
  • Page 54 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. C2212,C2213,C2319,C2320 CEAT2R2M50 CN2302 KR CONNECTOR B2B-PH-K-S C3005-C3010,C3015-C3018,C3037 CEAT2R2M50 CN2303 KR CONNECTOR B3B-PH-K-R C3039,C3091 CEAT2R2M50 CN2301 KR CONNECTOR 3P B3B-PH-K-S C2804,C2805,C5754 CEAT330M16 JUMPER WIRE D15A15-350-2651 C3501,C3502,C3509,C3510 CEAT470M25 CN3051 14P PLUG...
  • Page 55 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. C3019,C3020,C3031,C3032 CKSQYB682K50 RELAY C3503,C3504 CKSQYB682K50 RY3601 ASR7008 C3331-C3333,C3335-C3338 CKSQYF104Z50 C2801 CQHA822J2A CAPACITORS C2806 CQMBA223J50 C3345,C3346 (0.01µF) ACG7021 RESISTORS C2303,C2304 (270pF) ACG7024 C2335-C2338 CCCCH270J50 R2812 RD1/2LMF270J C2301,C2302 CCSQCH100D50 R2809...
  • Page 56 XR-A670, XR-A370 Mark No. Description Part No. Mark No. Description Part No. CAPACITORS SUB TRANS ASSY C5812 (0.047F/5.5V) ACH1246 SEMICONDUCTORS C5821 CEJA100M16 C5803 CEJA1R0M50 IC81 NJM7805FA C5510,C5811,C5814 CEJA470M16 2SD1859X C5804 CKSQYB102K50 D85,D88-D90 1SS133 S1WB(A)60-4062 C5995,C5996 CKSQYB103K50 C5816,C5997,C5998 CKSQYB104K25 COIL C5999...

  • Page 57: Adjustment

    XR-A670, XR-A370 6. ADJUSTMENT 6.1 TUNER SECTION 6.1.1 For MYXJ and NVXJ Types FM Tuner Section • Set the mode selector to FM BAND. • Connect the wiring as shown in Fig. 1. FM SG (1kHz, ± 75kHz dev.) Reception...
  • Page 58 XR-A670, XR-A370 6.1.2 For KUCXJ Type FM Tuner Section • Set the mode selector to FM BAND. • Connect the wiring as shown in Fig. 3. FM SG (1kHz, ± 75kHz dev.) Reception Step Adjustment Adjustment Frequency Specifications Frequency Level...
  • Page 59 XR-A670, XR-A370 6.2 CASSETTE DECK SECTION 6.2.1 For XR-A670 • Adjustment points and test points are shown in Fig.5, Fig.7 and Fig.9. Mechanical Adjustment • Test tape : NCT-111 (3kHz, 30min). 1. Tape Speed Adjustment Adjusting Measurement Mode Test Tape...
  • Page 60 XR-A670, XR-A370 0 dB 0 dB: 315 Hz, 250 nwb/m 10s ......................10s 315Hz –20 dB 12.5 6.3kHz 10kHz 315Hz 14kHz 10kHz 8kHz 4kHz 2kHz 1kHz 63Hz 40Hz Fig.6 STD-331E Test Tape Playback Adjustment (1) Head Azimuth Adjustment • Do not switch between forward and reverse operation with the screwdriver inserted.
  • Page 61 XR-A670, XR-A370 Recording Adjustment (1) Bias Oscillation Frequency Adjustment Input Signal/ Measurement Adjustment Step Mode Adjusting Points Remarks Test Tape Points Value Deck ΙΙ Oscillation If the REC/STOP button for four Load the STD-632 test seconds while the power is in STAND...
  • Page 62 XR-A670, XR-A370 SIDE A AF ASSY FRONT TAPE TEST POINT L ch R ch VR2303 VR2305 VR2302 VR2301 VR2304 VR2306 L2801 VR2802 VR2801 Fig.9 Adjustment and Measurement Points...
  • Page 63 XR-A670, XR-A370 6.2.2 For XR-A370 • Adjustment points and test points are shown in Fig.10, Fig.12 and Fig.13. Mechanical Adjustment • Test tape : NCT-111 (3kHz, 30min). 1. Tape Speed Adjustment Adjusting Measurement Mode Test Tape Adjustment Procedure Remarks Points...
  • Page 64 XR-A670, XR-A370 REV Azimuth Adjustment Screw FWD Azimuth Adjustment Screw Fig.12 Head Azimuth Adjustment Screw Playback Adjustment (1) Head Azimuth Adjustment • Do not switch between forward and reverse operation with the screwdriver inserted. Input Signal/ Measurement Adjustment Step Mode...
  • Page 65 XR-A670, XR-A370 SIDE B AF ASSY FRONT TAPE TEST POINT R ch L ch (VR is nothing) L2801 VR2301 VR2302 BIAS TP POINT VR2802 Fig.13 Adjustment and Measurement Points...

  • Page 66: Test Mode

    XR-A670, XR-A370 6.3 TEST MODE NOTE: There is no information to be shown in this CD adjustment. How to Start/Cancel Test Mode TEST MODE : ON TEST DISC: YEDS-7 CD TEST STOP Short Point Function CD STANDBY/ON CD TEST "TEST 4"...

  • Page 67: General Information

    XR-A670, XR-A370 7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DISASSEMBLY $M MECHANISM CD-2 × 3 Bonnet Case × 2 × 2 × 2 × 2 × 2 Tray Main Cam × 3 Unhook Note: The loading tray can be pulled out OPTICAL when the main cam is in this position.

  • Page 68: Front Panel

    XR-A670, XR-A370 FRONT PANEL Unhook Unhook FM/AM TUNER Module AF Assy Front Panel DISPLAY Assy SUB TRANS Assy PRIMARY Assy SECONDARY Assy $M MECHANISM CD-2 ADDITIONAL TO JOB Mechanism Base (Bottom View) Front Side...
  • Page 69 XR-A670, XR-A370 Clamper Holder Servo Base Servo Mechanism Assy Hook Clamper Holder Hook Servo Base Hook $M Mechanism CD Actuater Actuater Hook FITTING THE PULLEY INTO THE CARRIAGE MOTOR For replacement of the carriage motor, fit the motor pulley by using the servicing...

  • Page 70: Parts

    XR-A670, XR-A370 7.2 PARTS 7.2.1 IC • The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams. STK407-100B (AF ASSY : IC3301)(XR-A670 Only) • Power Amp. IC • Block Diagram Ch.
  • Page 71 XR-A670, XR-A370 PDC057A (DISPLAY ASSY : IC5501) • System Control Microcomputer • Pin Function Pin Name Function Pin Name Function CD RESET Reset output for CD LSI VFDP – CD SE CLK CD SENS readout clock D5593/S05 CD SENS CD SENS data input...

  • Page 72: Display

    XR-A670, XR-A370 7.2.2 DISPLAY XAV3008 (DISPLAY ASSY : V5621) • FL Display • Pin Assignment • Grid Assignment (2G) (2G to 9G) (10G to 16G)
  • Page 73 XR-A670, XR-A370 • Pin Connection Pin No. 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 Connection F2 F2 F2 NP NP 1G 2G 3G 4G 5G 6G 7G 8G 9G...

  • Page 74: Panel Facilities And Specifications

    XR-A670, XR-A370 8. PANEL FACILITIES AND SPECIFICATIONS 8.1 PANEL FACILITIES Front Panel Section...
  • Page 75 XR-A670, XR-A370 1 2 3 The illustration shows XR-A670. @ ! ~ = - º & ª • 7 Auto Play Function ¶ If you press the CD function button when a CD is loaded, the CD automatically starts playing. If you §...
  • Page 76 4 Lights during FM stereo reception. 5 Lights when Dolby NR is on. (XR-A670 only) 6 Indicates tuner reception status. 7 Lights when BEAT CUT 2 is selected. (XR-A670 only) 8 Lights when the RDS mode is selected. 9 Indicates SOUND MORPHING status.

  • Page 77: Remote Control Unit

    XR-A670, XR-A370 Remote Control Unit DISC select buttons (1-3) DISC CHANGE button OPEN/CLOSE button Digit (1-9, 10/0, >10) buttons BAND button Use to switch between FM and AM bands. 3 FM AM 2 TAPE function button RDM button RPT button...

  • Page 78: Specifications

    Motor ..............DC servo motor x 1 you an electrical shock. Check the power cord once in a while. Tape type When you find it damaged, ask your nearest PIONEER authorized XR-A370/KUCXJ .......... TYPE I (Normal) tape service center or your dealer for a replacement.

This manual is also suitable for:

Xr-a370

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