Pioneer XR-A770 Service Manual
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Pioneer XR-A770 Service Manual

Stereo cd cassette deck receiver
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STEREO CD CASSETTE DECK RECEIVER
XR-A770
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
Type
XR-A770
MYXJ
NVXJ
CONTENTS
1. SAFETY INFORMATION ...................................... 2
3. SCHEMATIC DIAGRAM ..................................... 14
4. PCB CONNECTION DIAGRAM .......................... 31
5. PCB PARTS LIST ............................................... 44
6. ADJUSTMENT .................................................... 49
PIONEER ELECTRONIC 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
PIONEER ELECTRONIC CORPORATION 1998
Power Requirement
AC220-230V
AC230V
7. GENERAL INFORMATION ............................... 55
7.1 PARTS ......................................................... 55
7.1.1 IC ......................................................... 55
7.1.2 DISPLAY .............................................. 61
7.2 DISASSEMBLY ........................................... 63
7.3 BLOCK DIAGRAM ....................................... 66
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
ORDER NO.
RRV2054
Remarks
T - ZZK NOV. 1998 Printed in Japan

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  • Page 1: Table Of Contents

    PIONEER ELECTRONIC 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 ELECTRONIC CORPORATION 1998 T –...

  • Page 2: Safety Information

    If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. IMPORTANT LABEL CHECK THIS PIONEER APPARATUS CONTAINS LASER OF CLASS 1. NVXJ Type 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 3: Exploded Views And Parts List

    See Contrast table (2) Rear Pad See Contrast table (2) Operating Instructions See Contrast table (2) (2) CONTRAST TABLE XR-A770/MYXJ and NVXJ are constructed the same except for the following : Part No. Mark No. Symbol and Description Remarks XR-A770...
  • Page 4 XR-A770 2.2 EXTERIOR (1/2) Note : Hook Tray cap on top of loading tray and then insert the bottom three hooks. Note : Attatch on the same numbers × three. Refer to "2.5 $M MECHANISM CD".
  • Page 5 XR-A770 • EXTERIOR (1/2) PARTS LIST Mark No. Description Part No. 22P F.F.C/30V XDD3018 $M Mechanism CD XXA3006 Volume Knob XAA3005 FL Cover A XAK3026 FL Cover B XAK3036 Tray Cap XZN3047 Display Panel XAK3049 Bonnet Case XZN3040 Screw BPZ30P100FZK...
  • Page 6 XR-A770 2.3 EXTERIOR (2/2) MYXJ Type only NVXJ Type only MYXJ Type only NVXJ Type only Refer to "2.4 FRONT PANEL SECTION".
  • Page 7 See Contrast table (2) Caution Label See Contrast table (2) Caution Label See Contrast table (2) (2) CONTRAST TABLE XR-A770/MYXJ and NVXJ are constructed the same except for the following : Part No. Mark No. Symbol and Description Remarks XR-A770...
  • Page 8 XR-A770 2.4 FRONT PANEL SECTION 34(2/2) 34(1/2) Refer to "2.7 MECHANISM UNIT".
  • Page 9 XR-A770 • FRONT PANEL SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. DISPLAY Assy XWZ3123 CD Lens XZN3037 CD SW LED Assy XWZ3131 Deck Lens L XZN3035 SUB DISPLAY Assy XWZ3112 Deck Lens R XZN3036 •...
  • Page 10 XR-A770 2.5 $M MECHANISM CD Refer to "2.6 SERVO MECHANISM ASSY".
  • Page 11 XR-A770 2.6 SERVO MECHANISM ASSY • $M MECHANISM CD PARTS LIST Mark No. Description Part No. MOTOR Assy AWZ8428 SW Assy AWZ8429 CD Assy XWZ3141 • • • • • Servo Spring ABH7126 Belt AEB7072 Clamp Magnet AMF7001 Yoke ANB7067...
  • Page 12 XR-A770 2.7 MECHANISM UNIT Mech. ΙΙ Only Mech. Ι Only Mech. ΙΙ Mech. Ι Mech. ΙΙ Mech. Ι Only Mech. ΙΙ...
  • Page 13 XR-A770 • MECHANISM UNIT PARTS LIST Mark No. Description Part No. Plate HD BLK (Mech. Ι) F513-819 Plate HD BLK (Mech. ΙΙ) F513-811 Motor Main BLK (Mech. ΙΙ only) F525-324 PCB Control BLK F567-621 Clutch Assy BLK F522-037 Main Belt FF17G-31 Joint Belt 113 (Mech.

  • Page 14: Schematic Diagram

    XR-A770 3. SCHEMATIC DIAGRAM 3.1 OVERALL WIRING DIAGRAM SERVO MECHANISM ASSY (AXA7039) CN8001 CN8002 CD ASSY(XWZ3141) FM/AM TUNER MODULE (AXQ7068) AF ASSY (XWZ3120) DISPLAY ASSY (XWZ3123) DECK MECHA SUB DISPLAY ASSY (XWZ3112)
  • Page 15 XR-A770 Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST". REAR AMP ASSY SW ASSY (AWZ8429) (XWZ3122) MOTOR ASSY (AWZ8428) CN8003 PRIMARY ASSY (XWZ3152) SECONDARY ASSY (XWZ3121) SUB TRANS...
  • Page 16 XR-A770 3.2 FM/AM TUNER MODULE MIX AMP RF AMP BUFFER IF AMP FM +B SW AM RF TUNING BLOCK FM/AM TUNER MODULE (AXQ7068)
  • Page 17 XR-A770 AF AMP AF AMP REGULATOR...
  • Page 18 XR-A770 3.3 CD, MOTOR and SW ASSEMBLIES CD ASSY (XWZ3141) MOTOR ASSY (AWZ8428) CARRIAGE MOTOR J8502 D20PWW0405E SERVO MECHANISM ASSY AXA7039...
  • Page 19 XR-A770 Note: The encircled numbers denote measuring point in the schematic diagram. CN8005- Pin 1 : PLAY MODE (RF) H : 500nsec/div 1.8Vp-p VREF CN8005- Pin 2 : TEST MODE, Tracking Open(TRER) H : 5msec/div C8308 1000p 1.0Vp-p C8307 VREF...
  • Page 20 XR-A770 3.4 AF ASSY (1/3) (REC) (REC) AF ASSY (PB) (XWZ3120) (REC) (PB) : DECK PB SIGNAL ROUTE (REC) : DECK REC SIGNAL ROUTE (REC) (REC) (PB) (PB) (PB) 220k 220k 0.01...
  • Page 21 XR-A770 IC2101(2/2) BA4558F–HT IC2101(1/2) (PB) BA4558F–HT (PB) (PB) (PB) (PB) (REC) (REC) (REC) (REC) (REC)
  • Page 22 XR-A770 CN8004 3.5 AF ASSY (2/3) (CD) (CD) (TA) (TA) (S/T) (S/T) (TA) R3019,R3020 XR-A880 : 1.8k XR-A770 : 3.9k XKB3002 (F/W) BA4558F-HT (PB) (CD) BA4558F-HT BA4558F-HT (F/W) (F/W) 1.8k 680k (PB) (PB) (PB) CN5501 CN83...
  • Page 23 XR-A770 CN6201 AF ASSY (XWZ3120) 4.332MHz (S/T) (TA) (S/T) (S/T) 6.8k 0.01 BA4558F-HT BA4558F-HT BA4558F-HT BA4558F-HT 0.01 6.8k 1SS133 0.033 1SS133 BA4558F-HT BA4558F-HT BA4558F-HT 0.033 (F/W) (F/W) BA4558F-HT (F/W) (F/W) (PB) (TA) : TUNER AUDIO SIGNAL ROUTE : CENTER SIGNAL ROUTE...
  • Page 24 XR-A770 3.6 AF (3/3) and SECONDARY ASSEMBLIES J3401 : CENTER SIGNAL ROUTE (S/T) : SURROUND/TWEETER SIGNAL ROUTE (F/W) (S/T) : FRONT/WOOFER SIGNAL ROUTE (S/T) (S/T) D3674 (S/T) D3673 (S/T) (S/T) U1GC44 (F/W) (F/W) (S/T) (F/W) (F/W) (F/W) BA4558F-HT 100k 0.15/50 (F/W) 5.6k...
  • Page 25 XR-A770 CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE NO. 491.400 MFD, BY REPLACE ONLY WITH SAME TYPE NO. 491002 MFD, BY LITTELFUSE INK. FOR IC23 (AEK7004).
  • Page 26 XR-A770 3.7 PRIMARY and SUB TRANS ASSEMBLIES SUB TRANS ASSY (AWZ3139) POWER TRANSFORMER PRIMARY ASSY (XWZ3152)
  • Page 27 XR-A770 AEK1060 (T4A) LIVE NEUTRAL • NOTE FOR FUSE REPLACEMENT CAUTION - FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY.
  • Page 28 XR-A770 3.8 DISPLAY and CD SW LED ASSEMBLIES DISPLAY ASSY DISPLAY ASSY S5911 : DISPLAY S5912 : TIMER/CLOCK ADJ (XWZ3123) S5913 : ENTER S5914 : BALANCE S5915 : ZOOM SURROUND S5916 : BASS BLASTER S5917 : EQUALIZER S5918 : PRESET...
  • Page 29 XR-A770 CN5401 CN5102 CN5502 52045–1445 CN5501 52045–3845 CN2901 52045–1945 D5561–D5568 1SS181 CD SW LED ASSY S5937 : OPEN/CLOSE ( S5938 : DISC CHANGE S5939 : DISC-3 S5940 : DISC-2 S5941 : DISC-1 D5553,D5554 D5555,D5556 D5557–D5560 1SS181 1SS181 1SS181 CD SW LED ASSY...
  • Page 30 XR-A770 3.9 SUB DISPLAY and REAR AMP ASSEMBLIES CN5502 SUB DISPLAY ASSY (XWZ3112) SUB DISPLAY ASSY S5401 : 60Hz level control S5402 : 120Hz level control S5403 : WOOFER level control S5404 : P.BASS ON/OFF REAR AMP ASSY (XWZ3122) (S/T)

  • Page 31: Pcb Connection Diagram

    XR-A770 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 32 XR-A770 4.2 CD, MOTOR and SW ASSEMBLIES SW ASSY MOTOR LOADING ASSY MOTOR SERVO MECHANISM ASSY Q8101 PICKUP ASSY Q8254 Q8252 Q8251 Q8253 CN1052 SIDE A (ANP7144-E) CD ASSY B C D...
  • Page 33 XR-A770 SW ASSY MOTOR ASSY IC8201 IC8101 IC8301 SIDE B (ANP7144-E) CD ASSY B C D...
  • Page 34 XR-A770 4.3 AF ASSY AF ASSY FAN MOTOR CN83 VR280 Q3081 Q3081 IC23 IC32 Q51 Q52 Q57 IC42 IC51...
  • Page 35 XR-A770 CN8004 CN5501 CN6201 J3401 MECHANISM UNIT SIDE A (XNP3009-B) VR2802 VR2801 VR2301-VR2306 IC2301 Q51 Q52 Q57 Q2801 Q2804 IC51 IC3331 IC3301 Q2802...
  • Page 36 XR-A770 AF ASSY SIDE B IC5892 IC5891 Q2306 Q2105 Q2104 IC2201 Q5751 Q5752 Q2802 Q2805-Q2807 IC2101 Q2103 IC5751 IC5751 Q2301 Q3353 Q3354 Q2203 Q2204 Q3607 Q3622 Q3611 Q3606 Q3605 Q3311-Q3314...
  • Page 37 XR-A770 (XNP3009-B) 5751 Q5752 IC3101-IC3103 Q3101 Q3102 IC3001 5751 IC5751 IC3381 Q3401-Q3403 IC3201-IC3203 Q3202 Q3201 Q2203 Q2204 Q56 Q53 Q55 IC34 Q33 3311-Q3314...
  • Page 38 XR-A770 4.4 SECONDARY ASSY SECONDARY ASSY IC41 IC71 IC21 IC22 IC31 SIDE A SECONDARY ASSY (XNP3009-B) SIDE B...
  • Page 39 XR-A770 4.5 PRIMARY and SUB TRANS ASSEMBLIES POWER TRANSFORMER PRIMARY ASSY AC IN SUB TRANS ASSY (XNP3013-B) SIDE A...
  • Page 40 XR-A770 4.6 DISPLAY and CD SW LED ASSEMBLIES DISPLAY CN5102 ASSY MECHANISM UNIT CD SW ASSY (XNP3013-B) SIDE A CN5401...
  • Page 41 XR-A770 DISPLAY ASSY Q2901 Q2903 Q2906 Q2908 Q5605 IC5601 Q2904 IC5501 Q2910 Q5502 Q5501 Q5821 IC5631 CD SW ASSY Q5601 Q5606 Q5604 IC3901 SIDE B (XNP3013-B) IC3931...
  • Page 42 XR-A770 4.7 SUB DISPLAY ASSY SUB DISPLAY ASSY IC5411 Q5411 Q5415 SIDE A SIDE B CN5502 (XNP3013-B)
  • Page 43 XR-A770 4.8 FM/AM TUNER MODULE CN3051 FM/AM TUNER MODULE VR6201 Q6204 Q6203 SIDE A FM/AM TUNER MODULE IC6201 Q6201 Q6202 Q6601 Q6214 Q6501 IC6202 Q6205 Q6102 - Q6105 Q6101 (ANP7160-B) SIDE B...

  • Page 44: Pcb Parts List

    XR-A770 Mark No. Description Part No. Mark No. Description Part No. 5. PCB PARTS LIST • Parts marked by "NSP" and can not be supplied. NOTES: • mark found on some component parts indicates the importance of the safety factor of the part.
  • Page 45 XR-A770 Mark No. Description Part No. Mark No. Description Part No. C6251, C6252 CKSQYB123K50 C8137, C8138, C8201, C8309, C8312 CKSQYB103K50 C6606, C6607 CKSQYB182K50 C8134, C8302, C8303 CKSQYB104K25 C6203, C6259 CKSQYB223K50 C8353, C8359 CKSQYB152K50 C6228 CKSQYB472K50 C8111 CKSQYB153K25 C6209 CKSQYB473K50 C8114, C8117, C8120, C8121...
  • Page 46 XR-A770 Mark No. Description Part No. Mark No. Description Part No. Q2806 2SB1197K C3313, C3314 CEANPR47M50 2SB1375 C2207, C2803, C2810, C3041, C3042 CEAT100M50 Q2803, Q2804 2SC1815 C3047, C3048, C3081, C3091–C3093 CEAT100M50 Q2801 2SC2240 C3441–C3444, C3450, C36, C3602 CEAT100M50 Q2102, Q2201, Q2202, Q3101, Q3102 2SC2412K...
  • Page 47 XR-A770 Mark No. Description Part No. Mark No. Description Part No. C2194, C37 CKSQYF105Z16 CAPACITORS C2801 CQHA822J2A CEAT220M50 C2210, C2211 CQMBA103J50 CEAT221M63 C2806 CQMBA223J50 CEAT222M25 C31 (4700µF/42V) XCH3003 CQMA103K2E C21, C22 (4700µF/80V) XCH3001 RESISTORS R2809 RD1/2LMF4R7J RESISTORS R2812 RD1/2PM270J RD1/4PU222J...
  • Page 48 XR-A770 Mark No. Description Part No. Mark No. Description Part No. D5592, D5594–D5596, D5811 1SS133 D5551–D5568 1SS181 CD SW LED ASSY D2901–D2903, D5569, D5570, D5626 1SS355 D5901 1SS355 SEMICONDUCTORS D5612 MAA5064X D5623 SLP3118C51H D5624 SLP7118C51H D5608–D5611 MBG5064X D5622 SLP9118C51H D5613–D5616 MPG5064X D5617–D5620...

  • Page 49: Adjustment

    XR-A770 6. ADJUSTMENT 6.1 TUNER SECTION FM Tuner Section • Set the mode selector to FM BAND. • Connect the wiring as shown in Fig. 1. ± d ( µ ) V v i t y t i i n i 1 ±...

  • Page 50: Mechanical Adjustment

    XR-A770 6.2 CASSETTE DECK SECTION • Adjustment points and test points are shown in Fig.3, Fig.5 and Fig.7. Mechanical Adjustment • Test tape: NCT-111 (3kHz, 30min). 1. Tape Speed Adjustment ± r i f & r i f ± Tape Speed ADJ.
  • Page 51 XR-A770 0 dB 0 dB: 315 Hz, 250 nwb/m 10s ......................10s 315Hz –20 dB 12.5 10kHz 8kHz 6.3kHz 10kHz 315Hz 14kHz 4kHz 2kHz 1kHz 63Hz 40Hz Fig. 4 STD-331E Test Tape Playback Adjustment (1) Head Azimuth Adjustment • Do not switch between forward and reverse operation with the screwdriver inserted.
  • Page 52 XR-A770 Recording Adjustment (1) Bias Oscillation Frequency Adjustment                       l l i e l i l l i ±...
  • Page 53 XR-A770 AF ASSY SIDE A FRONT TAPE TEST POINT R ch VR2303 VR2305 L ch VR2301 VR2302 VR2306 VR2304 VR2802 VR2801 L2801 Fig.7 Adjustment and Measurement Points...

  • Page 54: Test Mode

    XR-A770 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 Short Point Function CD STANDBY/ON CD TEST "TEST 4" Short Point...

  • Page 55: General Information

    XR-A770 7. GENERAL INFORMATION 7.1 PARTS 7.1.1 IC • The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams. HA12136AF (AF ASSY : IC2201) • Dolby B Type NR System IC •...
  • Page 56 XR-A770 • Pin Function z i l LC75396NE (AF ASSY : IC3001) • Electrical Volume IC • Block Diagram LSELO LFCOM LINVIN1 LFOUT LRIN LRCOM LROUT LVref LVref CONTROL LOGIC CIRCUIT CIRCUIT INTERFACE Vref RVref RVref RROUT RINVIN1 RRCOM RSELO...
  • Page 57 XR-A770 PDC049A (DISPLAY ASSY : IC5501) • System Control Microcomputer • Pin Function – – – – – – l a i – l a i l a i l a i...
  • Page 58 XR-A770 LC78622NE (CD ASSY : IC8301) • CD DSP IC • Block Diagram 64 11 32 33 62 23 8 DEFI VCO clock Slice level 2k × 8-bits RAM address control oscillator EFMIN generator clock control Interpolation Sync mute FSEQ...
  • Page 59 XR-A770 − i g i e l l l a i l l u t s i l i u i - t y f i − − − − − l l i l l i − l l i...
  • Page 60 XR-A770 LV1035M (PRO LOGIC ASSY : IC3701) • Dolby Pro Logic Decoder IC • Block Diagram L-BPF3 DCOUT3 R-RECT DCOUT4 23PIN L-RECT 15PIN VLR-TH VLR-1 DC-OUT VLR-2 DC-OUT VCS-2 L-OUT VCS-1 R-OUT VCS-TH S-OUT L+R-RECT DCOUT2 IREF L-R-RECT DCOUT1 R-BPF3...

  • Page 61: Display

    XR-A770 7.1.2 DISPLAY 7 XAV3004 (DISPLAY ASSY : V5621) • FL Display • Pin Assignment • Grid Assignment (2G) (2G to 9G) (7G) (9G) (9G) (16G to 10G)
  • Page 62 XR-A770 • Pin Connection Pin No. Connection F2 Pin No. Connection P7 NOTE 1) F1, F2... Filament 2) NP....No pin 3) DL....Datum Line 4) 1G to 16G..Grid • Anode Connection 3G to 6G 10G to 16G –...

  • Page 63: Disassembly

    XR-A770 7.2 DISASSEMBLY $M MECHANISM CD × 3 × 3 Bonnet Case × 3 × 3 × 2 × 3 Tray Cap × 3 Main Cam Unhook Note: The loading tray can be pulled out when the main cam is in this position.

  • Page 64: Front Panel

    XR-A770 FRONT PANEL Unhook Unhook CD SW LED Assy FM/AM TUNER MODULE AF Assy Front Panel DISPLAY Assy SUB TRANS Assy Mechanism Unit Release the jumper wire from Clip B. SUB DISPLAY Assy PRIMARY Assy SECONDARY Assy $M MECHANISM CD ADDITIONAL TO JOB...
  • Page 65 XR-A770 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 66: Block Diagram

    XR-A770 7.3 BLOCK DIAGRAM DUMMY TUNER IC3001 ZOOM BASS MODULE SURROUND BLASTER LC75396 (-2dB) $ MECH (-8dB) (200mV) BASS TREBLE TAPE DECK (-3.8dB) (+2dB) (-6dB) PROLOGIC LV1035M IC3701 To R ch From R ch BASS REAR CENTER BLASTER TRIM : -10dB...
  • Page 67 XR-A770 IC3381 IC3301 (XR-A880 : +5dB) (XR-A770 : +8dB) POWER AMP RY3601 FRONT TOTAL GAIN +42dB STK407-090 (+40dB) HEAD PHONE CN3991 IC3401 POWER AMP REAR XR-A880 ONLY CENTER TWEETER IC3951 TDA8560Q IC3421 (+40dB) (XR-A880 : +9dB) (XR-A770 : +5dB) IC3202...

  • Page 68: Panel Facilities And Specifications

    XR-A770 8. PANEL FACILITIES AND SPECIFICATIONS • PANEL FACILITIES 4 5 6 7 8 ¤ 1 2 3 ™ £ § ∞ ¶ ¢ • ª ^ & * ) ( ¡ º Ÿ ⁄ ≠ – DISC-1 indicator TAPE cassette door ¡...
  • Page 69 @ Indicates TAPE status. # Displays Audio level, spectrum analyzer and other indications. $ Indicates CD player operation status. % Lights when the RDS mode is selected. FRONT PANEL For moders XR-A770 120 Hz P.BASS ON/OFF 60 Hz WOOFER level...
  • Page 70 XR-A770 Function button section REMOTE CONTROL UNIT CD function button & TUNER/BAND function button TAPE function button AUX function button TUNING [1,4 (–), (+) ¢,¡] buttons STOP button (7) PLAY/PAUSE button (2 3) ÷ Roles of the common operation buttons (The rules of the buttons vary depending on the input functions as shown below.)
  • Page 71 XR-A770 REMOTE CONTROL UNIT 1 OPEN/CLOSE button 2 DISC CHANGE button 3 PGM button 4 SLEEP timer button 5 TAPE I/II function button 6 AUX function button 7 MONO button 8 BASS MODE button 9 MORPHING MODE button & MORPHING jog control...

  • Page 72: Specifications

    Dimensions Tweeter (RMS) ............30 W + 30 W (3 kHz, T.H.D. 10 %, 4 Ω) XR-A770 ........270 (W) x 380 (H) x 343 (D) mm Weight (without package) Tweeter (DIN) ............20 W + 20 W (3 kHz, T.H.D. 1 %, 4 Ω) XR-A770 ................

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