JVC HR-S6950EU Service Manual

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Instructions manual (68 pages)

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Page 1 3/28/2017 SERVICE MANUAL VIDEO CASSETTE RECORDER HR-S6950EU, HR-S6955MS, HR-S7950EU, HR-S7955EK, HR-S7955MS SPECIFICATIONS (The specifications shown pertain specifically to the model HR-S7950EU.) GENERAL Input/Output : 21-pin SCART connectors: IN/OUT x 1, IN/DECODER x 1 Power requirement : AC 220 V – 240 V...
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Page 3: Table Of Contents
3.2.4 A/C head phase(X-value) ............3-4 LOADING MOTOR BOARD ASSEMBLY<55> ........5-19 3.3 Electrical Adjustment ................ 3-4 S-P CONVERTER BOARD ASSEMBLY<87>[HR-S6955MS/S7955MS] ..5-19 The following table lists the differing points between models HR-S6950EU, HR-S6955MS, HR-S7950EU, HR-S7955EK and HR-S7955MS. MODEL HR-S6950EU...
Page 4: Important Safety Precautions
Important Safety Precautions Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
Page 5: Safety Check After Servicing
www.freeservicemanuals.info 3/28/2017 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli- ance with safety standards.
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Page 7: Disassembly
www.freeservicemanuals.info 3/28/2017 SECTION 1 DISASSEMBLY (3) Unload the pole base assembly by manually turning the gear 1.1 Manually removing the cassette tape of the loading motor until the pole base assembly is hidden If you cannot remove the cassette tape which is loaded be- behind the cassette lid.
Page 8: Removing The Major Parts
<Note 2a> assembly CN7005(WR2a) <Note 2b> - - - - - - - - - - - - - - - - - - - - - - - - - - [HR-S6950EU, S6950MS HR-S7950EU, S7955EK] Drum HOOK assembly CN7001(WR2a), (S3c) <Note 3c>...
Page 9 www.freeservicemanuals.info 3/28/2017 Drum assembly NOTE) INERTIA PLATE should be attached so as to ser small diameter of central round hole above. (S3a) Inertia plate <Note 3a> [1] Top cover (S3g) (S1a) (S2a) (L3b) (W3a) (WR3a) <Note 2a> (P3a) Roller arm assembly <Note 3e>...
Page 10: Emergency Display Function
www.freeservicemanuals.info 3/28/2017 1.3 Emergency display function This unit saves details of the last two emergencies as the EMG 0 : 00 : 00 Normal display (Counter or clock) history and allows the status of the VCR and the mechanism of each emergency to be shown both on the display and as EMG content display (E:Latest:Previous) See 1.3.4.
Page 11: Details Of The Osd Display In The Emg Display Mode
ROM No. tially different from the mechanism sensor information in EMG detail information <1>. A A : Key code (JVC code) [For MN* only] B B : Deck operation mode (See EMG detail information <1>.) C C : Mechanism operation mode (See EMG detail information <1>.) D D : Sensor information (See sensor information details.)
Page 12: Emg Content Description
www.freeservicemanuals.info 3/28/2017 1.3.4 EMG content description Note: EMG contents “E08/E09” are for the model with Dynamic Drum (DD). CONTENT CAUSE E01: Loading EMG If the mechanism mode does not change to the next mode within 4 sec- 1. The mechanism is locked in the middle of the mode transition during a tape loading operation. onds after the loading motor starts rotating in the loading direction, while 2.
Page 13: Emg Detail Information<1
www.freeservicemanuals.info 3/28/2017 1.3.5 EMG detail information <1> * 2 : Mechanism operation mode [Table of MN*] The status (electrical operation mode) of the VCR and the status Display Mechanism operation mode (mechanism operation mode/sensor information) of the mechanism Command standby (No command to be executed) in the latest EMG can be confirmed based on the figure in EMG Immediate Power OFF after EMG occurrence detail information <1>...
Page 14: Emg Detail Information<2
www.freeservicemanuals.info 3/28/2017 3– : Mechanism sensor information * 5 : Cassette tape type <1> [Common table of MN* and HD*] Display Cassette tape type <1> Mechanism sensor information Display Cassette type not identified Mechansim Start sensor End sensor REC safety SW position sensor Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified Small reel, thick tape (T-120) identified/thin tape (T-140) identified...
Page 15: Service Position
www.freeservicemanuals.info 3/28/2017 1.4 Service position Jig RCU mode This unit has been designed so that the Mechanism and Main This unit uses the following two modes for receiving remote control codes. board assemblies can be removed together from the chassis assembly.
Page 16: Maintenance And Inspection
www.freeservicemanuals.info 3/28/2017 1.7.3 Suggested servicing schedule for main components 1.7 Maintenance and inspection The following table indicates the suggested period for such 1.7.1 Cleaning service measures as cleaning, lubrication and replacement. In Regular cleaning of the transport system parts is desirable but practice, the indicated periods will vary widely according to en- practically impossible.
Page 17: Mechanism
www.freeservicemanuals.info 3/28/2017 SECTION 2 MECHANISM 2.1 Before disassembling 2.1.3 Setting the mechanism assembling mode The mechanism-assembling mode is provided with this mecha- 2.1.1 Notes nism. When disassembling and assembling, it is required to This model’s mechanism relates closely to the rotary encoder engage this mode.
Page 18: Layout Of The Main Mechanism Parts
www.freeservicemanuals.info 3/28/2017 2.1.4 Layout of the main mechanism parts Pole base assy T4 Main brake assy T3 A/C head (take-up Side) (take-up side) Pinch roller arm assy Full erase head Lid guide Pole base assy (supply side) T7 Guide arm assy T8 Brake lever Tension arm assy T9 Drive lever...
Page 19: Disassembling Procedure Table
www.freeservicemanuals.info 3/28/2017 2.1.5 Disassembling procedure table This table shows the order of parts removal when replacing each part. For replacement, remove the parts in the order of 1 to 13 shown in the table and install the parts in the reverse order. The symbol number before each part name shows the number in the figure “Layout of the main mechanism parts”.
Page 20: Replacement Of The Main Mechanism Parts
www.freeservicemanuals.info 3/28/2017 2.2 Replacement of the main mechanism parts 2.2.1.3 Disassembling (1) Release hook (a) to remove the earth spring (1) from the 2.2.1 Cassette holder top frame. 2.2.1.1 Removal (2) Release the catches (a) and (b) and pull the top frame in the direction shown by the arrow (a) to remove it.
Page 21: A/C Head
www.freeservicemanuals.info 3/28/2017 2.2.2 A/C head Screw (b) 2.2.2.1 Removal SIDE FRAME(R) (1) Remove screws (a) and (b). (2) Remove the A/C head together with the head base. (3) Remove the screws (c), (d) and (e) to remove the spring (a) and the A/C head from the Head base.
Page 22: Guide Arm, Pinch Roller Arm
www.freeservicemanuals.info 3/28/2017 2.2.3 Guide arm, pinch roller arm 2.2.4 Idler arm, idler gear 1/2 2.2.3.1 Removal 2.2.4.1 Removal (1) Remove the spring (a) from the hook (a) and detach the (1) Release the catches (a) and (b) to detach the idler arm. guide arm assembly.
Page 23: Press Lever, Control Cam, Capstan Brake Assembly,Loading Motor Assembly
www.freeservicemanuals.info 3/28/2017 2.2.6 Press lever, control cam, capstan brake assembly, loading motor assembly Tension arm assembly Spring (b) Main brake (T) assembly Catch (d) 2.2.6.1 Removal Catch (c) Section (b) Spring (a) BRAKE (1) Remove the slit washer (a) to detach the press lever. Spring (a) LEVER (2) Release the slit washer (b) to detach the control cam.
Page 24: Capstan Motor, Load Gear, Control Plate
www.freeservicemanuals.info 3/28/2017 Note: 2.2.6.2 Installation (phase adjustment) When replacing the worm bearing of the loading motor as- • (1) Attach the loading motor assembly to the main deck. sembly, attach it according to the following specification. (2) Secure the screw (a). If worm bearing is not attached correctly, a mechanism (3) Solder the wire to section (a).
Page 25: Clutch Unit Assembly, Direct Gear
www.freeservicemanuals.info 3/28/2017 2.2.7.2 Installation (phase adjustment) 2.2.8 Clutch unit assembly, direct gear (1) Place the main deck on the guide hole (a) of the tension arm 2.2.8.1 Removal lever. (1) Remove the slit washer (a) to detach the clutch unit assem- (2) Place the main deck on the guide hole (b) of the brake le- bly.
Page 26: Mechanism Timing Chart
www.freeservicemanuals.info 3/28/2017 2.3 Mechanism timing chart REEL MECHANISM MODE SERCH SLOW EJECT PLAY STOP BRAKE /REW /STILL /SLOW /STILL CONTROL PLATE B FR MARK POLE BASE LOCK REEL LOCK FREE TENSION ARM PLAY TENSION STOP FF/REW ARM LEVER (STOP MODE PRESS UP) BRAKE LEVER GUIDE ARM...
Page 27: Adjustment
www.freeservicemanuals.info 3/28/2017 SECTION 3 ADJUSTMENT Before adjustment s Colour bar signal [SECAM] s Colour bar pattern [SECAM] 3.1.1 Precaution • The adjustments of this unit include the mechanism compatibility and electrical adjustments. During the performance of this work, be sure to observe the pre- 0.7 Vp-p cautions for each type of adjustment.
Page 28: Mechanism Compatibility Adjustment
www.freeservicemanuals.info 3/28/2017 3.1.7 EVR adjustment 3.2 Mechanism compatibility adjustment Some of the adjustments require the adjustment performed Notes: by the EVR system. The main unit have EEPROMs for stor- • Although compatibility adjustment is very important, it is not ing the EVR adjustment data and user setups. necessary to perform this as part of the normal servicing work.
Page 29: Fm Waveform Linearity
www.freeservicemanuals.info 3/28/2017 3.2.2 FM waveform linearity • Proper waveform variation • Signal (A1) Alignment tape(SP, stairstep, PAL) [MHPE] • (A2) Alignment tape(LP, stairstep, PAL) [MHPE-L] • Mode • Equipment Oscilloscope • Improper waveform variation • Measuring point (D) TP106 (PB. FM) Down •...
Page 30: A/C Head Phase(X-Value)
www.freeservicemanuals.info 3/28/2017 3.2.4 A/C head phase (X-value) Electrical adjustment • Note: Signal (A1) Alignment tape(SP, stairstep, PAL) [MHPE] The following adjustment procedures are not only necessary • (A2) Alignment tape(LP, stairstep, PAL) [MHPE-L] after replacement of consumable mechanical parts or board •...
Page 31: Slow Tracking Preset
www.freeservicemanuals.info 3/28/2017 (10) Record the signal (A3) in the mode (B2), and play back the recorded signal. (11) Set the VCR to the manual tracking mode. 3.3.1.2Slow tracking preset (12) Repeat steps (3) to (7) in the mode (B2). Signal (A1) •...
Page 32: Syscon Circuit(Eu/Ek Model)
www.freeservicemanuals.info 3/28/2017 3.3.4 Syscon circuit [EU/EK MODEL] Note: 3.3.5.2 SECAM burst position • When perform this adjustment, remove the Mechanism assembly. Signal (A1) • Ext. input (A2) • Color (colour) bar signal [SECAM] Mode • EE 3.3.4.1 Timer clock Equipment •...
Page 33 www.freeservicemanuals.info 3/28/2017 Digitized in Heiloo Netherland...
Page 34 www.freeservicemanuals.info 3/28/2017 VICTOR COMPANY OF JAPAN, LIMITED S40894 VIDEO DIVISION Digitized in Heiloo Netherland Printed in Japan...
Page 35: Packing And Accessory Assembly
PACKING AND ACCESSORY ASSEMBLY <M1> The instruction manual to be provided with this product will differ according to the destination. (HR-S6955MS/S7955MS) ADHESIVE TAPE SPEC OF BARCODE 306A (HR-S7955EK) SPEC OF BARCODE (HR-S6950EU/S7950EU) SPEC OF BARCODE (HR-S7955EK) 315 (HR-S6955MS/S7955MS) FINAL ASSY <M2> MODEL MARK HR-S6950EU...

Page 36: Final Assembly
3/28/2017 BEWARE OF BOGUS PARTS FINAL ASSEMBLY <M2> Parts that do not meet specifications may cause trouble in regard to safety and performance. We recommend that genuine JVC parts be used. 519A MECHANISM ASSY<M4> NOTE) AFTER ATTACHED ROLLER ARM ASS'Y, TIGHTEN SCREW WITH SLIT WASHER.

Page 37 www.freeservicemanuals.info 3/28/2017 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
Page 38: Mechanism Assembly
www.freeservicemanuals.info 3/28/2017 MECHANISM ASSEMBLY <M4> A/C HEAD BOARD ASSY <12> LOADING MOTOR BOARD ASSY <55> Classifi- Symbol in Part No. cation drawing Grease KYODO-SH-JB NOTE:The section marked in AA and BB indicate lubrication and greasing areas. COSMO-HV56 Digitized in Heiloo Netherland...

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Page 40: Electrical Parts List
3/28/2017 MODEL MARK MODEL MARK HR-S6950EU HR-S7955EK ELECTRICAL PARTS LIST HR-S6955MS HR-S7955MS HR-S7950EU REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - -...
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Page 48: D Board Assembly<05>[Hr-S6950Eu/S6955Ms/S7955Ms]
CAPACITOR 0.1µF,25V C1233 QDYB1CM-103Y CAPACITOR 0.01µF,16V ****************************** C1234 NCF21EZ-104X CAPACITOR 0.1µF,25V C1235 QEKJ0JM-476 E CAPACITOR 47µF,6.3V 2D D BOARD ASSEMBLY <05> [HR-S6950EU/S6955MS/S7955MS] C1236 NCF21EZ-104X CAPACITOR 0.1µF,25V C1237 NCF21EZ-104X CAPACITOR 0.1µF,25V C1238 NDC21HJ-180X CAPACITOR 18pF,50V LPA10162-02C 2D DIGITAL BOARD ASSY C1239...
Page 49: D/2M Board Assembly<05>[Hr-S7950Eu/S7955Ek]
www.freeservicemanuals.info 3/28/2017 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
Page 50: Terminal Board Assembly<06
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Page 52: A/C Head Board Assembly<12
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Page 53: Loading Motor Board Assembly<55
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Page 55 3/28/2017 SCHEMATIC DIAGRAMS VIDEO CASSETTE RECORDER HR-S6950EU, HR-S6955MS, HR-S7950EU, HR-S7955EK, HR-S7955MS CD-ROM No.SML200207 SPECIFICATIONS (The specifications shown pertain specifically to the model HR-S7950EU.) GENERAL Input/Output : 21-pin SCART connectors: Power requirement : AC 220 V – 240 V , 50 Hz/60 Hz...
Page 56 www.freeservicemanuals.info 3/28/2017 SECTION 4 CHARTS AND DIAGRAMS 4) Indication on schematic diagram NOTES OF SCHEMATIC DIAGRAM Voltage Indications for REC and PB mode on the sche- matic diagram are as shown below. Safety precautions The Components identified by the symbol critical for safety.
Page 57 www.freeservicemanuals.info 3/28/2017 6. Signal path Symbols CIRCUIT BOARD NOTES The arrows indicate the signal path as follows. 1. Foil and Component sides 1) Foil side (B side) : Playback signal path Parts on the foil side seen from foil face (pattern face) are indicated.
Page 58: Board Interconnections
3.58NTSC(L)/SLOW PULSE FRONT VIDEO OPEN CN7001 CN7003 (FOR 400HA) (FOR 400HA) IN(L) ONLY USED FOR ONLY USED FOR FRONT HR-S7950EU/S7955EK HR-S6950EU/S6955MS/S7955MS AUDIO IN(R) b5/KEY OUT CN7004 OPEN ROTARY ENCODER (for 400EA) b5/KEY OUT LP/EP LP/EP SP FMA FMA FLY.E CH2 CH1 CH2...
Page 59 www.freeservicemanuals.info 3/28/2017 MAIN (VIDEO/N.AUDIO) SCHEMATIC DIAGRAM The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. 3 MAIN(VIDEO/N.AUDIO) TO FMA 2Fsc RF_AUDIO NA_PB NA_REC...
Page 60 www.freeservicemanuals.info 3/28/2017 MAIN (ON SCREEN) SCHEMATIC DIAGRAM MAIN (SECAM) SCHEMATIC DIAGRAM [HR-S6955MS/S7955MS] Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List.
Page 61 www.freeservicemanuals.info 3/28/2017 MAIN (FMA) SCHEMATIC DIAGRAM The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. MAIN[FMA] C2222 0.01 SW5V TO SW.REG SW12V C2233 C2232...
Page 62 NORM/MESEC/S IC3001 A.MUTE[H] S.CLK R3012 R3073 TIMER CLOCK C3030 /6.3 SECAM_DET HD6432194SBD30F TU_V_MUTE[H] S.DATA_FRSYS R3072 ON SCREEN R3013 TP3904 C3004 VIDEO_ENV [HR-S6950EU/S7950EU/S7955EK] SYNC_DET[H] SYNC_DET[H] 0.047 R3014 R3071 START_SENSOR HD6432194SAD32F MODE OSD_CS R3015 B3070 R3205 R3206 R3207 R3208 R3209 R3210 R3211...
Page 63 www.freeservicemanuals.info 3/28/2017 MAIN (SW.REG) SCHEMAITC DIAGRAM Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts , refer to the Parts List. MAIN[SW.REG] TO SYSCON T5001 R5302 R5303 QQS0083-001 1.2k...
Page 64 www.freeservicemanuals.info 3/28/2017 MAIN (TUNER) SCHEMATIC DIAGRAM The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. 0 3 MAIN (TUNER) : Used # DIFFERENCE TABLE : Not used ANT IN...
Page 65 www.freeservicemanuals.info 3/28/2017 MAIN (FRONT), MINI FRONT, S-JACK AND ADV.JOG SCHEMATIC DIAGRAMS Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts , refer to the Parts List. MAIN (FRONT) 2 8 MINI FRONT...
Page 66 www.freeservicemanuals.info 3/28/2017 4.10 MAIN (MAIN TERMINAL) SCHEMATIC DIAGRAM Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts , refer to the Parts List. VIDEO/N.AUDIO A.IN1[L] A.IN1[R] LINE_OUT[L] LINE_OUT[R] A.IN2[L]...
Page 67 3/28/2017 4.11 2D DIGITAL SCHEMATIC DIAGRAM [HR-S6950EU/S6955MS/S7955MS] The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. 0 5 2D DIGITAL C1212 0.001...
Page 68 www.freeservicemanuals.info 3/28/2017 4.12 3D/TBC (2M) SCHEMATIC DIAGRAM [HR-S7950EU/S7955EK] Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts , refer to the Parts List. 0 5 3D/TBC(2M) R1447 C1459 OPEN...
Page 69 www.freeservicemanuals.info 3/28/2017 4.13 TERMINAL (S-SUB) SCHEMATIC DIAGRAM The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. 0 6 TERMINAL(S-SUB) S-P CONVERTER CN511 SW12V SW12V...
Page 70 www.freeservicemanuals.info 3/28/2017 4.14 TERMINAL (I/O) SCHEMATIC DIAGRAM The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. TERMINAL(I/O) R916 Q905 DTC144WU L913 4.7µ...
Page 71: Demodulator Schematic Diagram
www.freeservicemanuals.info 3/28/2017 4.15 DEMODULATOR SCHEMATIC DIAGRAM Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts , refer to the Parts List. 1 4 DEMOD R6719 R6720 C6727 0.47 C6728...
Page 72: S-P Converter Schematic Diagram [Hr-S6955Ms/S7955Ms]
www.freeservicemanuals.info 3/28/2017 4.16 S-P CONVERTER SCHEMATIC DIAGRAM [HR-S6955MS/S7955MS] The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. Note : When replacing the parts , refer to the Parts List. 8 7 S-P CONVERTER L1605 10µ...
Page 73: Main Circuit Board
www.freeservicemanuals.info 3/28/2017 4.17 MAIN CIRCUIT BOARD <03> MAIN DANGEROUS VOLTAGE LPB10170-001C CN904 CN905 CN901 CN902 CN903 CN5001 R7204 FC5002 C5003 FC5001 F5001 LIVE/BRN C6013 R6051 VA5003 C6056 C103 R7203 C2063 C6053 R2056 C2062 Q2061 R2061 C6052 T2051 C2053 Q2051 R6052 C2008 C2007 C6055...
Page 74 www.freeservicemanuals.info 3/28/2017 COMPONENT PARTS LOCATION GUIDE <MAIN> LPB10170-001C REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION R3074 R6031 C3022 CN7001 R2059 CAPACITOR C309 R3075 R6032 R2060 C310 C3024 DIODE R6033 R2061 R3076 C311...
Page 75 www.freeservicemanuals.info 3/28/2017 4.18 2D DIGITAL AND 3D DIGITAL/2M CIRCUIT BOARDS <05> 2D DIGITAL LPB10162-001C COMPONENT PARTS LOCATION GUIDE <2D DIGITAL> LPB10162-001C LPB10162 D/A LEVEL ADJ 2D DIGITAL PWB REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION -001C C1212 CAPACITOR C1231 L1203 R1211 C1214 C1216...
Page 76: Demodulator Circuit Board
www.freeservicemanuals.info 3/28/2017 4.19 DEMODULATOR CIRCUIT BOARD 4.21 TERMINAL CIRCUIT BOARD <06> TERMINAL COMPONENT PARTS LOCATION GUIDE LPB10138-001B <TERMINAL> LPB10138-001B <14> DEMODULATOR COMPONENT PARTS LOCATION GUIDE LPA10138- REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION TERMINAL PWB ASS'Y CAPACITOR C954 R535 B C 13B LPB10094-001C <DEMODULATOR>...
Page 77: Waveforms
www.freeservicemanuals.info 3/28/2017 4.22 WAVEFORMS < SYSCON > CN3001-1 CN3001-11 TP4001 IC3001-1 IC3001-98 CAP.M_FG DRUM_PG/FG CTL.P CTL(+) WF21 CN902-1 WF22 CN902-5 C.SYNC WF23-1 CN902-9 WF23-2 CN902-9 WF24 IC301-15 WF25 IC30-17 REC/PB 4.6 Vp-p PB 2.7 Vp-p REC 4.2 Vp-p PAL PB 0.6 Vp-p PB 2.2 Vp-p REC/PB 5 Vp-p REC/PB 2.2 Vp-p...
Page 78: Voltage Charts
<S-P CONVERTER> CN511 MODE PLAY PIN NO. IC1601 IC1607 CN901 CN7001 12.0 12.0 IC301[HR-S6955MS/S7955MS] 12.0 12.0 CN911 IC1602 IC3001 <2D DIGITAL> [HR-S6950EU,HR-S6955MS, CN902 HR-S7955MS] MODE PLAY PIN NO. CN912 IC1201 CN1201 IC1603 CN1601 12.0 12.0 12.0 12.0 CN903 CN6701 CN913 IC3002 10.1...
Page 79: Remote Controller Schematic Diagram
www.freeservicemanuals.info 3/28/2017 4.24 REMOTE CONTROLLER SCHEMATIC DIAGRAM 4.26 CPU PIN FUNCTION <SYSCON IC3001> PIN NO. LABEL IN/OUT FUNCTION PIN NO. PIN NO. LABEL LABEL IN/OUT IN/OUT FUNCTION FUNCTION CTL(+) IN/OUT CTL(+) SIGNAL INPUT FOR THE JOG SHUTTLE SVSS REC_SAFETY REC SAFETY SWITCH DETECT (SW ON:L) (LP20878-016#) CTL(-) IN/OUT CTL(-) SIGNAL...
Page 80: System Control Block Diagram
MAIN ( SYSCON, MAIN TERMINAL ) IC3001 ( SYSTEM CONTROL MICRO PROCESSOR ) OSC2(OUT) X3002 MAIN SYSTEM CLOCK (10MHz) OSC1(IN) ONLY USED FOR X3001 HR-S6950EU/S7950EU/S7955EK C3025 TIMER CLOCK TIMER CLOCK ( 32kHz ) CN3001 CAP.M_FG CAP.M_F/R CAP.M F/R 3 in 1 MDA CAP.M_VCTL...
Page 81: Video Block Diagram
3/28/2017 4.28 VIDEO BLOCK DIAGRAM (Only used for HR-S7950EU/S7955EK) (Only used for HR-S6950EU/S6955MS/S7955MS) ( Y/C SEP & MIX ) IC1401 3D/TBC(2M) DIGITAL S-P CONVERTER IC1201 ( MIX ) & DFFI Q1419 IIC_DATA SDATA VR1601 IC1607 Q1607- R-Y LEVEL IC1606...
Page 82 3/28/2017 MAIN(VIDEO, ON SCREEN, SECAM, MAIN TERMINAL) HR-S6955MS/S7955MS SECAM SECTION SECAM_REC_COLOR HR-S7950EU/S7955EK Q11, Q40 HR-S6950EU/S6955MS/S7955MS TP106 I2C_DATA_A/V V_TO_OSD PB.FM I2C_CLK_A/V 2Fsc SECAM_PB_COLOR WF24 C.SYNC/V.REF C.SYNC WF25 SYSCON & IC301 P.MUTE(L) PB_FM V.PULSE D.FF HR-S7950EU SYNC GATE MUTE TP111 SYNC...
Page 83: Audio Block Diagram
A.IN(L) CN2002 B2051 F. ERASE TRANS PRE AMP A.GND T2051 A.OUT(L) ONLY USED FOR A.IN(R) REC ON HR-S6950EU/S6955MS A.OUT(R) HR-S7950EU/S7955EK REAR OUT A/C HEAD CN2001 J916 EP ( LP ) ON J902 AUDIO ( R ) A. ERASE (AV2 IN/DECODER) REC/PB A.IN(L)
Page 84 www.freeservicemanuals.info 3/28/2017 VICTOR COMPANY OF JAPAN, LIMITED S40894 VIDEO DIVISION Digitized in Heiloo Netherland Printed in Japan...

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Hr-s6955ms Hr-s7950eu Hr-s7955ms Hr-s7955ek

JVC HR-S6950EU Service Manual

Important Safety Precautions

1 Disassembly

2 Mechanism

3 Adjustment

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