Pioneer XR-VS77 Service Manual
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Pioneer XR-VS77 Service Manual

Stereo cd/vcd cassette deck receiver
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STEREO CD/VCD CASSETTE DECK RECEIVER
XR-VS77
XR-VS55
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
XR-VS77
DBDXJ
DLXJ/NC
CONTENTS
1. SAFETY INFORMATION ...................................... 2
3. SCHEMATIC DIAGRAM ..................................... 16
4. PCB CONNECTION DIAGRAM .......................... 34
5. PCB PARTS LIST ............................................... 46
6. ADJUSTMENT .................................................... 53
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. 501 Orchard Road, #10-00 Wheelock Place, Singapore 238880
PIONEER ELECTRONIC CORPORATION 1998
PREV
Model
Power Requirement
XR-VS55
AC110-127V/220-230V/240V
AC110-127V/220-230V/240V
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
NEXT
RETURN
SELECT
XR-VS77
The Voltage can be converted by
the following method.
With the voltage selector
With the voltage selector
7. GENERAL INFORMATION ............................... 62
7.1 PARTS ......................................................... 62
7.1.1 IC ......................................................... 62
7.1.2 DISPLAY .............................................. 75
7.2 DISASSEMBLY ........................................... 79
7.3 BLOCK DIAGRAM ....................................... 82
ORDER NO.
RRV2035
T – ZZK OCT. 1998 Printed in Japan

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  • Page 1 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. 501 Orchard Road, #10-00 Wheelock Place, Singapore 238880 PIONEER ELECTRONIC CORPORATION 1998...

  • 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 THIS PIONEER APPARATUS CONTAINS LASER OF CLASS 1. 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

    Dry Cell Battery (R6P, AA) VEM-013 Door Spacer XHG3002 Catalog Bag Z21-038 Video Cord VDE1034 (0.03 × 230 × 340) Front Pad XHA3003 (2) CONTRAST TABLE XR-VS77/DBDXJ, DLXJ/NC, XR-VS55/DBDXJ and DLXJ/NC are constructed the same except for the following :...
  • Page 4 XR-VS77, XR-VS55 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. XR-VS55 only Refer to "2.5 $M MECHANISM VCD". XR-VS77 only...
  • Page 5 Cord Stopper See Contrast table (2) Push Rivet See Contrast table (2) Cushion Rubber XEB3002 Mic Knob See Contrast table (2) Screw VBT30P080FZK (2) CONTRAST TABLE XR-VS77/DBDXJ, DLXJ/NC, XR-VS55/DBDXJ and DLXJ/NC are constructed the same except for the following :...
  • Page 6 XR-VS77, XR-VS55 2.3 EXTERIOR (2/2) XR-VS77 only XR-VS77 only XR-VS55 only XR-VS77 only 28 27 DLXJ/NC Type only Except DLXJ/NC Type XR-VS55 only XR-VS77 only Refer to "2.4 FRONT PANEL SECTION".
  • Page 7 Fuse Card See Contrast table (2) Fuse Card See Contrast table (2) Locking Spacer See Contrast table (2) Card Spacer See Contrast table (2) (2) CONTRAST TABLE XR-VS77/DBDXJ, DLXJ/NC, XR-VS55/DBDXJ and DLXJ/NC are constructed the same except for the following :...

  • Page 8: Front Panel Section

    XR-VS77, XR-VS55 2.4 FRONT PANEL SECTION XR-VS77 only XR-VS55 only XR-VS77 only XR-VS55 only 34(1/2) XR-VS77 only 34(2/2) XR-VS55 only XR-VS77 only XR-VS55 only Refer to "2.7 and 2.8 MECHANISM UNIT".
  • Page 9 TIMER Button See Contrast table (2) Latch Mold L XMR3001 Binder See Contrast table (2) Latch Mold R XMR3002 GND Plate B XNG3005 (2) CONTRAST TABLE XR-VS77/DBDXJ, DLXJ/NC, XR-VS55/DBDXJ and DLXJ/NC are constructed the same except for the following :...
  • Page 10 XR-VS77, XR-VS55 2.5 $M MECHANISM VCD Refer to "2.6 SERVO MECHANISM ASSY".
  • Page 11 XR-VS77, XR-VS55 2.6 SERVO MECHANISM ASSY • $M MECHANISM VCD PARTS LIST Mark No. Description Part No. MOTOR Assy XWZ3080 SW Assy XWZ3081 VCD SURVO Assy XWX3003 TRADE Assy XWZ3082 Servo Spring ABH7126 Belt AEB7072 Clamp Magnet AMF7001 Yoke ANB7067...
  • Page 12 XR-VS77, XR-VS55 2.7 MECHANISM UNIT (XR-VS77) Mech. ΙΙ Only Mech. Ι Only Mech. ΙΙ Mech. Ι Mech. ΙΙ Mech. Ι Only Mech. ΙΙ...

  • Page 13: Table Of Contents

    XR-VS77, XR-VS55 • MECHANISM UNIT PARTS LIST Mark No. Description Part No. Plate HD BLK (Mech. ΙΙ) F513-811 Plate HD BLK (Mech. Ι) F513-819 Motor Main BLK (Mech. ΙΙ only) F525-324 • • • • • PCB Control BLK F567-621...
  • Page 14 XR-VS77, XR-VS55 2.8 MECHANISM UNIT (XR-VS55) Mech. ΙΙ Only Mech. Ι Only Mech. ΙΙ Mech. Ι Mech. ΙΙ Mech. ΙΙ Only Mech. ΙΙ Only Mech. ΙΙ Only Mech. Ι...

  • Page 15: Table Of Contents

    XR-VS77, XR-VS55 • MECHANISM UNIT PARTS LIST Mark No. Description Part No. Plate HD BLK (Mech. ΙΙ) F513-811 Plate HD BLK (Mech. Ι) F513-825 Motor Main BLK (Mech. ΙΙ only) F525-324 • • • • • PCB Control BLK F567-622...

  • Page 16: Schematic Diagram

    3.1 OVERALL WIRING DIAGRAM CD SW LED ASSY (XWZ3086) XR-VS77 ONLY FM/AM TUNER MODULE (AXQ7065) CN6201 1/3, 2/3, AF ASSY (XR-VS77 : XWZ3102) (XR-VS55 : XWZ3068) VCD SURVO ASSY (XWX3003) SW ASSY MOTOR (XWZ3081) ASSY (XWZ3080) TRADE ASSY SERVO MECHANISM ASSY (XWZ3082) (AXA7039)
  • Page 17 XR-VS77, XR-VS55 Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST". DISPLAY ASSY (XR-VS77 : XWZ3104) (XR-VS55 : XWZ3070) XR-VS77 ONLY XR-VS77 ONLY AEK7071 XR-VS77 ONLY SECONDARY ASSY (XR-VS77 : XWZ3103)
  • Page 18 XR-VS77, XR-VS55 3.2 FM/AM TUNER MODULE MIX AMP RF AMP 1T378A BUFFER IF AMP FM +B SW MW RF TUNING BLOCK AKX7041 FM/AM TUNER MODULE (AXQ7065)
  • Page 19 XR-VS77, XR-VS55 AF AMP AF AMP REGULATOR...
  • Page 20 XR-VS77, XR-VS55 3.3 VCD SURVO, MOTOR, SW and TRADE ASSEMBLIES TRADE ASSY (XWZ3082) SW ASSY (XWZ3081) DA DB...
  • Page 21 XR-VS77, XR-VS55 VCD SURVO ASSY (1/2) (XWX3003) Note: The encircled numbers denote measuring point in the SIGNAL ROUTE schematic diagram. (CD) CN1003- Pin 2 : :CD AUDIO SIGNAL ROUTE CN1003- Pin 3 : PLAY MODE (RF) TEST MODE, (FS) : FOCUS SERVO LOOP LINE...
  • Page 22 XR-VS77, XR-VS55...
  • Page 23 XR-VS77, XR-VS55 SIGNAL ROUTE (CD) :CD AUDIO SIGNAL ROUTE (CD) (CD) VCD SURVO ASSY (2/2) (XWX3003)
  • Page 24 XR-VS77, XR-VS55 3.4 AF ASSY (1/3) AF ASSY (XR-VS77 : XWZ3102) (XR-VS55 : XWZ3068) XR-VS55 ONLY XR-VS77 ONLY XR-VS77 ONLY C2335 27p 22k(XR-VS77) 39k(XR-VS55) XR-VS55 ONLY XR-VS77 ONLY XR-VS55 ONLY C2336 27p : DECK PB SIGNAL ROUTE : DECK REC SIGNAL ROUTE...
  • Page 25 XR-VS77, XR-VS55 XR-VS55 ONLY XR-VS55 ONLY XR-VS55 ONLY 22k(XR-VS77) 1k(XR-VS55) 22k(XR-VS77) 1k(XR-VS55) XR-VS55 ONLY XR-VS55 XR-VS77 ONLY ONLY XR-VS77 ONLY...
  • Page 26 XR-VS77, XR-VS55 3.5 AF ASSY (2/3) CN1004 : AUDIO SIGNAL ROUTE : CD AUDIO SIGNAL ROUTE : TUNER AUDIO SIGNAL ROUTE : DECK PB SIGNAL ROUTE 6.8k(XR-VS77) : DECK REC SIGNAL ROUTE 0k(XR-VS55) 6.8k(XR-VS77) 3.9k(XR-VS55) 2.2/50(XR-VS77) 0.47/50(XR-VS55) 6.8k(XR-VS77) 0k(XR-VS55) 6.8k(XR-VS77) 3.9k(XR-VS55)
  • Page 27 XR-VS77, XR-VS55 CN6201 AF ASSY (XR-VS77 : XWZ3102) (XR-VS55 : XWZ3068) XR-VS77 ONLY XR-VS77 ONLY...
  • Page 28 XR-VS77, XR-VS55 3.6 AF (3/3) and SECONDARY ASSEMBLIES IC3301 STK407-070B(XR-VS77) STK407-050B(XR-VS55)
  • Page 29 TYPE NO. 4911.25 MFD, BY LITTELFUSE INK. TYPE NO. 491005 MFD, BY LITTELFUSE INK. (XR-VS77 : XWZ3102) FOR IC71 (AEK7010). FOR IC21 AND IC22 (AEK7046: XR-VS77). CAUTION : FOR CONTINUED PROTECTION AGAINST CAUTION : FOR CONTINUED PROTECTION AGAINST (XR-VS55 : XWZ3068) RISK OF FIRE.
  • Page 30 XR-VS77, XR-VS55 3.7 PRIMARY and SUB TRANS ASSEMBLIES PRIMARY ASSY (XWZ3048) XR-VS77 : AEK1057 (T2A) XR-VS55 : AEK1056 (T1.6A) SUB TRANS ASSY (XWZ3049)
  • Page 31 XR-VS77, XR-VS55 10000pF/AC250V • NOTE FOR FUSE REPLACEMENT CAUTION - FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY. XR-VS77 : AEK1060 (T4A) XR-VS55 : AEK1059 (T3.15A)
  • Page 32 XR-VS77, XR-VS55 3.8 DISPLAY and CD SW LED ASSEMBLIES DISPLAY ASSY (XR-VS77 : XWZ3104) (XR-VS55 : XWZ3070) SLP6118C51H XR-VS77 ONLY XR-VS55 ONLY XR-VS77 ONLY XR-VS77 ONLY 1k(XR-VS77) 0(XR-VS55) XR-VS55 ONLY V5621 FL TUBE XAV3004(XR-VS77) XAV3003(XR-VS55)
  • Page 33 XR-VS77, XR-VS55 2/3 CN5101 CN5501 52045-4045 HLEM19S-1(XR-VS77) HLEM17S-1(XR-VS55) XR-VS77 ONLY XR-VS77 ONLY XR-VS77 XR-VS77 ONLY ONLY 1SS183 XR-VS55 XR-VS77 ONLY ONLY XR-VS55 ONLY DISPLAY ASSY S5911 : DISPLAY S5924 : REC/STOP S5912 : TIMER S5925 : FREQ/STATION S5913 : ENTER S5926 : DOLBY NR ON/OFF S5914 : P.

  • Page 34: Pcb Connection Diagram

    XR-VS77, XR-VS55 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 35 XR-VS77, XR-VS55 4.1 FM/AM TUNER MODULE SIDE A CN3051 FM/AM TUNER MODULE VR6201 Q6204 Q6203 SIDE B FM/AM TUNER MODULE IC6201 Q6201 Q6202 Q6301 Q6303 Q6302 Q6304 Q6401 IC6202 Q6214 Q6403 Q6306 Q6402 Q6404 Q6205 (ANP7159-B)
  • Page 36 XR-VS77, XR-VS55 4.2 VCD SURVO, MOTOR, SW and TRADE ASSEMBLIES TRADE ASSY SERVO MECHANISM ASSY SW ASSY MOTOR ASSY LOADING MOTOR (XNP3011-A) CN1053 VCD SURVO ASSY Q1351 Q1352 Q1353 Q1354 IC1001 IC1401 IC1301 IC1201 Q1101 IC1701 IC1501 IC1752 PICKUP ASSY...
  • Page 37 XR-VS77, XR-VS55 VCD SURVO ASSY IC1754 IC1755 IC1101 IC1751 (XNP3010-A) SIDE B...
  • Page 38 XR-VS77, XR-VS55 4.3 AF ASSY MECHANISM CN6201 UNIT AF ASSY VR2302 VR230 VR2802 VR280 SIDE A Q3081 Q2803 Q2804 Q2801 IC32 IC51 IC42 Q3352 Q3351...
  • Page 39 XR-VS77, XR-VS55 CN1004 CN5501 MECHANISM UNIT MECHANISM UNIT (XNP3008-C) VR2302 VR2301 VR2303 VR2306 VR2802 VR2801 IC2301 IC3301...
  • Page 40 XR-VS77, XR-VS55 AF ASSY (XNP3008-C) IC5891 IC2101 IC5892 Q3605 Q3608 Q2301 Q2204 Q2203 Q2 Q2802 Q2306 Q2105 Q3601 Q3603 Q2302 IC2201 SIDE B IC3301 Q3314 Q3313 Q3312 Q331...
  • Page 41 XR-VS77, XR-VS55 IC2101 Q2201 Q2202 Q5751 Q5752 IC5691 IC3001 Q2204 Q2203 Q2103 IC5751 IC3951 IC3101 IC3103 IC2201 Q3353 Q3354 Q2805 Q2807 Q3101 Q3102 Q3312 Q3311 Q3351 Q3352 IC42 IC51 IC32...

  • Page 42: Primary Assy

    XR-VS77, XR-VS55 4.4 SECONDARY and PRIMARY ASSEMBLIES SECONDARY ASSY IC71 IC11 IC31 IC12 IC41 IC21 IC22 (XNP3008-C) POWER TRANSFORMER (T1) (XNP3012-B) PRIMARY ASSY SIDE A...
  • Page 43 XR-VS77, XR-VS55 4.5 SUB TRANS ASSY SUB TRANS ASSY CN81 AC IN LIVE NEUTRAL (XNP3012-B) SIDE A...
  • Page 44 XR-VS77, XR-VS55 4.6 DISPLAY and CD SW LED ASSEMBLIES DISPLAY ASSY CN5101 MECHANISM UNIT CD SW LED ASSY (XNP3012-B) SIDE A...
  • Page 45 XR-VS77, XR-VS55 DISPLAY ASSY Q2903 Q2901 Q2906 Q2908 Q2907 Q5605 IC5601 Q2904 IC5501 Q2910 Q2911 Q5801 Q5502 Q5501 Q5821 IC5631 CD SW LED ASSY Q5606 Q5601 Q5604 IC3901 (XNP3012-B) SIDE B IC3931...

  • Page 46: Pcb Parts List

    XR-VS77, XR-VS55 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 47 XR-VS77, XR-VS55 Mark No. Description Part No. Mark No. Description Part No. C6413 CCSQRH180J50 COILS AND FILTERS C6414 CCSQRH8R0D50 F1501 DTF1064 C6405 CCSQTH150J50 F1201 DTF1066 C6234, C6235 CEAL1R0M50 F1202 DTF1067 C6245 CEAL470M16 F1705, F1706 DTF1069 L1702 LCTB1R8K2125 C6224 CEAT100M50 C6243...
  • Page 48 XR-VS77, XR-VS55 Mark No. Description Part No. Mark No. Description Part No. Q3081 2SD1858X RESISTORS 2SD2012 R1704 RS1/10S2001F Q2203, Q2204, Q2805, Q3311, Q3312 2SD2114K Other Resistors RS1/10S Q2301, Q2302 2SK368 Q3313 DTA124EK OTHERS Q2104, Q2105, Q3314 DTC124EK CN1004 16P FFC CONNECTOR 52044–1645...
  • Page 49 XR-VS77, XR-VS55 Mark No. Description Part No. Mark No. Description Part No. C3037–C3042, C3104 CEAT2R2M50 C2804, C2805, C3105 CEAT330M16 AF ASSY (XWZ3068) C3106, C3109 CEAT4R7M50 C3021, C3022 CEATR10M50 SEMICONDUCTORS C2203, C2204, C3101, C3102 CEATR22M50 IC2101, IC3951, IC5691 BA4558F–HT IC5891 BU4094BCF...
  • Page 50 XR-VS77, XR-VS55 Mark No. Description Part No. Mark No. Description Part No. C33, C35, C3602, C3953, C43 CEAT100M50 CN3991 HEADPHONE JACK XKN3001 CEAT100M50 C2002, C2316 CEAT101M16 C3303, C3304 CEAT101M50 SECONDARY ASSY C2312, C2313, C32, C3311, C3312 CEAT1R0M50 (1) CONTRAST TABLE...
  • Page 51 XR-VS77, XR-VS55 Mark No. Description Part No. Mark No. Description Part No. C3939 CKSQYB123K50 RESISTORS C5509, C5951–C5954 CKSQYB471K50 All Resistors RD1/4PU C3907, C3938, C5506–C5508 CKSQYB472K50 C3935 CKSQYB473K50 OTHERS C3942, C5602, C5631–C5634, C5901 CKSQYF104Z50 4P CABLE HOLDER 51048–0400 C5503, C5504, C5813, C5822...
  • Page 52 XR-VS77, XR-VS55 Mark No. Description Part No. Mark No. Description Part No. SWITCHES AND RELAYS CD SW LED ASSY S5951 ASX7004 S5952 ASX7017 SEMICONDUCTORS S5911–S5915, S5917–S5925 XSG3001 S5927–S5936 XSG3001 D5623 SLP3118C51H D5624 SLP7118C51H D5622 SLP9118C51H CAPACITORS C5812 (0.047F/5.5V) ACH1246 SWITCHES...

  • Page 53: Adjustment

    XR-VS77, XR-VS55 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 1 ± 2...
  • Page 54 XR-VS77, XR-VS55 6.2 CASSETTE DECK SECTION 6.2.1 For XR-VS77 • 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 ±...
  • Page 55 XR-VS77, XR-VS55 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 •...
  • Page 56 XR-VS77, XR-VS55 Recording Adjustment (1) Bias Oscillation Frequency Adjustment                       l l i e l i l l i ±...
  • Page 57 XR-VS77, XR-VS55 AF ASSY SIDE A FRONT TAPE TEST POINT L ch R ch VR2303 VR2305 VR2302 VR2301 VR2304 VR2306 L2801 VR2802 VR2801 Fig.7 Adjustment and Measurement Points...
  • Page 58 XR-VS77, XR-VS55 6.2.2 For XR-VS55 • Adjustment points and test points are shown in Fig.8, Fig.10 and Fig.11. Mechanical Adjustment • Test tape: NCT-111 (3kHz, 30min). 1. Tape Speed Adjustment ± r i f & r i f ± Tape Speed ADJ.
  • Page 59 XR-VS77, XR-VS55 REV Azimuth Adjustment Screw FWD Azimuth Adjustment Screw Fig. 10 Head Azimuth Adjustment Screw Playback Adjustment (1) Head Azimuth Adjustment • Do not switch between forward and reverse operation with the screwdriver inserted. c i l Recording Adjustment (1) Bias Oscillation Frequency Adjustment ...
  • Page 60 XR-VS77, XR-VS55 SIDE B AF ASSY FRONT TAPE TEST POINT R ch L ch (VR is nothing) L2801 VR2301 VR2302 BIAS TP POINT VR2802 Fig.11 Adjustment and Measurement Points...

  • Page 61: Test Mode

    XR-VS77, XR-VS55 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"...

  • Page 62: General Information

    XR-VS77, XR-VS55 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 63 XR-VS77, XR-VS55 • Pin Function z i l LC75394NED (AF ASSY : IC3001) • Electrical Volume IC • Pin Function t i c t i c t i c t i c t i c t i c t i c...
  • Page 64 XR-VS77, XR-VS55 • Block Diagram LF4C3 RF4C3 LF4C2 RF4C2 LF4C1 RF4C1 LF3C3 RF3C3 LF3C2 RF3C2 LF3C1 RF3C1 LATCH LF2C3 RF2C3 LF2C2 RF2C2 LF2C1 RF2C1 DECODER LF1C3 RF1C3 LF1C2 RF1C2 LF1C1 RF1C1 SHIFT REGISTER LTIN RTIN LSELO RSELO LINVIN1 RINVIN1 CONTROL...
  • Page 65 XR-VS77, XR-VS55 STK407-070B (AF ASSY : IC3301)(XR-VS77) STK407-050B (AF ASSY : IC3301)(XR-VS55) • Audio IC • Block Diagram TR21 TR14 TR13 TR18 TR11 TR23 TR16 TR15 TR20 TR10 TR22 TR12 TR24 TR17 TR19...
  • Page 66 XR-VS77, XR-VS55 PDC050A (DISPLAY ASSY : IC5501) • System Control Microcomputer • Pin Function – – – – – – – l a i – l a i l a i l a i...

  • Page 67: Block Diagram

    XR-VS77, XR-VS55 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...
  • Page 68 XR-VS77, XR-VS55 − 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 69 XR-VS77, XR-VS55 BU9253FS (DISPLAY ASSY : IC3931) • 1 Chip Karaoke Echo LSI • Block Diagram COUNTER SRAM • Pin Function l l i CL680T-D1 (VCD ASSY : IC1701) • MPEG Decoder • Block Diagram Host Decompression RISC HostData lnterface...
  • Page 70 XR-VS77, XR-VS55 LA9241ML (VCD ASSY : IC1101) • CD RF/SERVO • Block Diagram RF DET FIN2 1 FIN1 2 u-com DGND INTER FACE TB 5 RFS- TE- 6 TE 7 RFSM RFAmp TESI 8 T.SERVO & T.LOGIC SCI 9 SLOF...
  • Page 71 XR-VS77, XR-VS55 PDK032A (VCD ASSY : IC1751) • 1M ROM • Block Diagram MEMORY MATRIX (131,072 x 8bit) COLUMN SELECTOR TIMING SENSE AMP GENERATOR BUFFER BUFFER /D.C.
  • Page 72 XR-VS77, XR-VS55 LC78632 (VCD ASSY : IC1201) • Compact Disc Signal Processing and Servo control for Video Compact Disc player. • Pin Function y l l t s i - t l t s i l l u t s i...
  • Page 73 XR-VS77, XR-VS55 y t i l l i l l i a l l l l i s l l t t i a l l t i s t t i y l f r i f e i l .
  • Page 74 XR-VS77, XR-VS55 PDC051A (VCD ASSY : IC1501) • VCD Control Microcomputer • Pin Function — — — — — — — — " ( : " t i r — — L " : " v i t — —...

  • Page 75: Display

    XR-VS77, XR-VS55 7.1.2 DISPLAY 7 XAV3004 (DISPLAY ASSY : V5621)(XR-VS77) • FL Display • Pin Assignment • Grid Assignment (2G) (2G to 9G) (7G) (9G) (9G) (16G to 10G)
  • Page 76 XR-VS77, XR-VS55 • 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 77 XR-VS77, XR-VS55 7 XAV3003 (DISPLAY ASSY : V5621) (XR-VS55) • FL Display • Pin Assignment • Grid Assignment (10G) (14G) (2G to 9G) • Pin Connection Pin No. Connection F2 Pin No. Connection P7 NOTE 1) F1, F2..Filament 2) NP....No pin 3) NX....
  • Page 78 XR-VS77, XR-VS55 • Anode Connection 2G 3G to 6G 10G 11G 13G 14G B10 R10 B11 R11 B12 R12 – – – – – – – – – – – – – – – – – – – – –...

  • Page 79: Disassembly

    XR-VS77, XR-VS55 7.2 DISASSEMBLY $M MECHANISM VCD × 3 Bonnet Case × 2 × 2 × 3 × 2 × 2 Tray Cap Main Cam × 3 Note: The loading tray can be pulled out Unhook when the main cam is in this position.

  • Page 80: Front Panel

    XR-VS77, XR-VS55 FRONT PANEL Unhook Unhook CD SW LED Assy FM/AM TUNER MODULE (XR-VS77 only) AF Assy Front Panel DISPLAY Assy SUB TRANS Assy PRIMARY Assy SECONDARY Assy $M MECHANISM VCD ADDITIONAL TO JOB Mechanism Base (Bottom View) Front Side...
  • Page 81 XR-VS77, XR-VS55 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 82: Block Diagram

    XR-VS77, XR-VS55 7.3 BLOCK DIAGRAM DUMMY TUNER IC3001 ZOOM BASS MODULE SURROUND BLASTER LC75394 (-2dB) FUNCTION $ MECH (-8dB) (200mV) (-8dB) TONE BUSS (3 BAND) TAPE DECK (-3.8dB) (+2dB) (-6dB) To R ch From R ch BASS BLASTER IC2501 IC2501...
  • Page 83 XR-VS77, XA-VS55 IC3301 POWER AMP FRONT TOTAL GAIN +29dB MAIN VOL. STK407-050 (+42dB) HEAD PHONE CN3991 XR-VS77 ONLY TAPE IC2301 IC2201 DECK REC IN TAPE DECK VR2301 HA12136AF HA12211NT DOLBY NR F2201 Vref Vref Vref Vref...

  • Page 84: Panel Facilities And Specifications

    XR-VS77, XR-VS55 8. PANEL FACILITIES AND SPECIFICATIONS • PANEL FACILITIES 7 XR-VS55 VS55 ¡ PREV NEXT RETURN SELECT £ ¢ ™ ≠ – Ÿ ∞ § $ % ^ * & ¶•ªº PLAY/PAUSE SELECT 2 3, MEMORY button DISC-1 select button & indicator DISC-2 select button &...
  • Page 85 XR-VS77, XA-VS55 7 XR-VS77 4 5 6 7 8 ¤ 1 2 3 ™ £ § PREV NEXT RETURN SELECT ∞ ¶ ¢ ‹ › fi • ª ^ & * ) ( ¡ º Ÿ ⁄ ≠ – DISC-1 indicator...
  • Page 86 XR-VS77, XR-VS55 7 For model XR-VS55 7 8 9 0 7 For model XR-VS77 Display section Indicates TAPE status. Indicates audio level. Displays audio level, spectrum analyzer and other Lights when the selected function is CD. indications. Lights when the selected function is TAPE.
  • Page 87 XR-VS77, XA-VS55 Function button section CD function button TUNER/BAND function button TAPE function button AUX function button TUNING 1,4 (–) PREV, (+) ¢,¡ NEXT buttons STOP/RETURN button (7) PLAY/PAUSE SELECT button (2 3) ÷ Roles of the common operation buttons (The rules of the buttons vary depending on the input functions as shown below.)
  • Page 88 XR-VS77, XR-VS55 Remote control unit OPEN/CLOSE button DISC CHANGE button KEYCON buttons TAPE function button AUX function button SHIFT button To operate an indicated function on the numerical key-pad, press the desired button while pressing the SHIFT button. Ex. Press ->...

  • Page 89: Specifications

    Continuous Power Output (RMS) ........100 W + 100 W (1 kHz, T.H.D. 10%, 6 Ω) Dimensions XR-VS55, XR-VS77 ....270 (W) x 300 (H) x 336 (D) mm Peak Music Power Output ..........2,000 W Weight (without package) FM/AM Tuner section XR-VS55 ................

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