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SERVICE MANUAL
No.82900
December 2001
HR-DVS3EK/EU
Mini DV/S-VHS VIDEO CASSETTE RECORDER
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-DVS3EU.)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD
625
TV PR +
TV PR ­
T
V
­
TV
+
12
3
45
6
78
9
1
2
1
2
3
VHS
DV
TV
CABLE/SAT
TV/VCR
­ ­:­ ­
AUDIO
0000
START
DEBUT
STOP
FIN
DATE
PR
DAILY/QTDN.
VPS/PDC
AUX
WEEKLY/HEBDO
EXPRESS
LCD PROG
0
PROG
OK
3
4
4
MENU
30 SEC
ENTER/ENTREE
VHS
DUB
COPIE
DV
DV
VHS
PR
/ +
PUSH / TURN
24H
EXPRESS
1
32
PULL-OPEN
TIRER-OUVRIR
PULL-OPEN
TIRER-OUVRIR
GENERAL
Power requirement : AC 220 V ­ 240 Vd, 50 Hz/60 Hz
Power consumption
Power on
: 31 W
Power off
: 6.5 W
Temperature
Operating
: 5
°C to 40°C
Storage
: ­20
°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD)
: 435 mm x 106 mm x 380 mm
Weight
: 5.1 kg
Input/Output
: 21-pin SCART connectors:
IN/OUT x 1, IN/DECODER x 1
RCA connectors:
VIDEO IN x 1, AUDIO IN x 1,
AUDIO OUT x 1
S-Video connectors:
IN x 1, OUT x 1
DV connector:
IN/OUT x 1 (4-pin, IEEE1394
conformity, digital input/output)
VHS DECK VIDEO/AUDIO
Signal system
: PAL-type colour signal and CCIR
monochrome signal, 625 lines
50 fields
Recording system : DA4 (Double Azimuth) head helical
scan system
Format
: S-VHS/VHS PAL standard
Signal-to-noise ratio: 45 dB
Horizontal resolution
(SP/LP)
: 250 lines (VHS)
400 lines (S-VHS)
Frequency range
: 70 Hz to 10,000 Hz (Normal audio)
20 Hz to 20,000 Hz (Hi-Fi audio)
Maximum recording time
(SP)
: 240 min. with E-240 video cassette
(LP)
: 480 min. with E-240 video cassette
DV DECK VIDEO/AUDIO
Signal system
: PAL-type colour signal, 625 lines
50 fields
Recording system : Digital Component Recording
Format
: DV format (SD mode)
Cassette
: Mini DV Cassette
Maximum recording time
(SP)
: 80 min. with M-DV80ME cassette
(LP)
: 120 min. with M-DV80ME cassette
Audio recording system
: PCM 48 kHz, 16 bit (2 ch)/
32 kHz, 12 bit (4 ch)
TUNER/TIMER
TV channel storage capacity
: 99 positions (+AUX position)
Tuning system
: Frequency synthesized tuner
Channel coverage : VHF 47 MHz ­ 89 MHz/
104 MHz ­ 300 MHz/
302 MHz ­ 470 MHz
UHF 470 MHz ­ 862 MHz
Memory backup time
: Approx. 10 min.
ACCESSORIES
Provided accessories
: RF cable,
21-pin SCART cable,
Satellite Controller,
Infrared remote control unit,
"R6" battery x 2
Specifications shown are for SP mode unless otherwise
specified.
E.& O.E. Design and specifications subject to change without
notice.


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TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 HOW TO REMOVE THE MAJOR PARTS ........................................ 1-1
1.1.1 Introduction .................................................................................. 1-1
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY .................. 1-1
1.3 DISCONNECTION OF CONNECTORS (WIRES) ............................ 1-1
1.4 HOW TO REMOVE THE MAJOR PARTS <COM section> .............. 1-2
1.4.1 Disassembly flow chart ................................................................ 1-2
1.4.2 Disassembly/assembly method <COM section> ......................... 1-2
1.5 HOW TO REMOVE THE MAJOR PARTS <VHS section> ............... 1-4
1.5.1 Disassembly flow chart ................................................................ 1-4
1.5.2 DIsassembly/assembly method <VHS section> .......................... 1-4
1.6 HOW TO REMOVE THE MAJOR PARTS <DV section> .................. 1-6
1.6.1 Disassembly flow chart ................................................................ 1-6
1.6.2 Disassembly/assembly method <DV section> ............................. 1-6
1.7 CONNECTION .................................................................................. 1-8
1.8 SERVICE POSITIONS .................................................................... 1-10
1.8.1 Requirement PATCH CORDS .................................................... 1-10
1.8.2 Service position <VHS SIDE> .................................................... 1-10
1.8.3 Service position <DV FOIL SIDE> ............................................. 1-10
1.8.4 Service position <DV COMPONENT SIDE> .............................. 1-11
1.9 Jig RCU mode ................................................................................. 1-11
1.9.1 Setting the Jig RCU mode ......................................................... 1-11
1.9.2 Setting the User RCU mode ...................................................... 1-11
1.10 MECHANISM SERVICE MODE ................................................... 1-12
1.10.1 How to set the "MECHANISM SERVICE MODE" .................... 1-12
1.11 EMERGENCY DISPLAY FUNCTION ............................................ 1-13
1.11.1 Displaying the emergency information ..................................... 1-13
1.11.2 Clearing the emergency history ............................................... 1-13
1.11.3 Emergency content description ................................................ 1-14
1.11.4 Emergency detail information <1> ........................................... 1-15
1.11.5 Emergency detail information <2> ........................................... 1-16
2. MECHANISM ADJUSTMENT (VHS)
2.1 BEFORE STARTING REPAIR AND ADJUSTMENT ......................... 2-1
2.1.1 Precautions .................................................................................. 2-1
2.1.2 Checking for Proper Mechanical Operations ............................... 2-1
2.1.3 Manually Removing the Cassette Tape ....................................... 2-1
2.1.4 Jigs and Tools Required for Adjustment ....................................... 2-2
2.1.5 Maintenance and Inspection ........................................................ 2-3
2.2 REPLACEMENT OF MAJOR PARTS ............................................... 2-6
2.2.1 Before Starting Disassembling
(Phase matching between mechanical parts) ............................... 2-6
2.2.2 How to Set the Mechanism Assembling Mode ............................. 2-6
2.2.3 Cassette Holder Assembly ........................................................... 2-6
2.2.4 Pinch Roller Arm Assembly .......................................................... 2-8
2.2.5 Guide Arm Assembly and Press Lever Assembly ........................ 2-8
2.2.6 Audio Control Head ...................................................................... 2-8
2.2.7 Loading Motor .............................................................................. 2-8
2.2.8 Capstan Motor ............................................................................. 2-9
2.2.9 Pole Base Assembly (supply or take-up side) .............................. 2-9
2.2.10 Rotary Encoder ........................................................................ 2-10
2.2.11 Clutch Unit ................................................................................ 2-10
2.2.12 Change Lever Assembly, Direct Gear, Clutch Gear
and Coupling Gear .................................................................... 2-10
2.2.13 Link Lever ................................................................................ 2-11
2.2.14 Cassette Gear, Control Cam and Worm Gear ......................... 2-11
2.2.15 Control Plate ............................................................................ 2-11
2.2.16 Loading Arm Gear (supply or take-up side)
and Loading Arm Gear Shaft .................................................... 2-12
2.2.17 Take-up Lever, Take-up Head and Control Plate Guide .................. 2-13
2.2.18 Capstan Brake Assembly ......................................................... 2-13
2.2.19 Sub Brake Assembly (take-up side) ......................................... 2-13
2.2.20 Main Brake Assembly (take-up side),
Reel Disk (take-up side)
and Main Brake Assembly (supply side) ................................... 2-13
2.2.21 Tension Brake Assembly, Reel Disk (supply side)
and Tension Arm Assembly ....................................................... 2-14
2.2.22 Idler Lever, Idler Arm Assembly ............................................... 2-14
2.2.23 Stator Assembly ....................................................................... 2-14
2.2.24 Rotor Assembly ........................................................................ 2-14
2.2.25 Upper Drum Assembly ............................................................. 2-15
2.3 COMPATIBILITY ADJUSTMENT .................................................. 2-16
2.3.1 Checking/Adjustment of FM Waveform Linearity ....................... 2-16
2.3.2 Checking/Adjustment of the Height and Tilt of the Audio Control Head .................... 2-17
2.3.3 Checking/Adjustment of the Audio Control Head Phase (X-Value) ............... 2-17
2.3.4 Checking/Adjustment of the Standard Tracking Preset ............. 2-18
2.3.5 Checking/Adjustment of the Tension Pole Position .................... 2-18
MECHANISM ADJUSTMENT (DV)
2.4 PREPARATION ............................................................................... 2-20
2.4.1 Precautions ................................................................................ 2-20
2.4.2 Tools Required for Adjustments ................................................. 2-20
2.4.3 Disassembly and Assembly Procedures .................................... 2-20
2.4.4 Screws and Washers Used in Disassembly/
Assembly of the Mechanism Assembly ...................................... 2-20
2.5 DISASSEMBLY/ASSEMBLY OF THE MECHANISM ASSEMBLY ................... 2-21
2.5.1 Introduction ................................................................................ 2-21
2.5.2 Mechanism Modes ..................................................................... 2-21
2.6 MECHANISM TIMING CHART ....................................................... 2-23
2.7 MECHANISM ASSEMBLY/DISASSEMBLY PROCEDURE TABLE .................. 2-24
2.8 DISASSEMBLY/ASSEMBLY ........................................................... 2-26
2.9 LIST OF PROCEDURES FOR DISASSEMBLY ............................. 2-34
2.10 MECHANISM PHASE CHECK/ADJUSTMENT ............................ 2-35
2.11 MECHANISM DISASSEMBLY/ASSEMBLY SHEET ..................... 2-36
2.12 POSITIONING THE TENSION POLE ........................................... 2-38
2.13 COMPATIBILITY AND ERROR RATE ADJUSTMENTS ................. 2-39
2.13.1 Preparation .............................................................................. 2-39
2.13.2 Adjustment ............................................................................... 2-39
2.13.3 Linearity adjustment ................................................................. 2-40
2.13.4 PB switching point adjustment ................................................. 2-40
2.13.5 Error rate adjustment ............................................................... 2-40
2.13.6 Error rate measuring method ................................................... 2-40
2.14 TAPE EJECTION .......................................................................... 2-41
3. ELECTRICAL ADJUSTMENT (VHS)
3.1 PRECAUTION .................................................................................. 3-1
3.1.1 Required test equipments ............................................................ 3-1
3.1.2 Required adjustment tools ........................................................... 3-1
3.1.3 Color (colour) bar signal,Color (colour) bar pattern ..................... 3-1
3.1.4 Switch settings and standard precautions ................................... 3-1
3.1.5 EVR Adjustment ........................................................................... 3-1
3.2 SERVO CIRCUIT .............................................................................. 3-2
3.2.1 Switching point ............................................................................. 3-2
3.2.2 Slow tracking preset ..................................................................... 3-2
3.3 VIDEO CIRCUIT ............................................................................... 3-2
3.3.1 D/A level ....................................................................................... 3-2
3.3.2 EE Y/PB Y (S-VHS/VHS) level ..................................................... 3-2
3.3.3 REC color (colour) level ............................................................... 3-3
3.3.5 Video EQ (Frequency response) ................................................. 3-3
3.3.6 AUTO PICTURE initial setting ...................................................... 3-4
3.3.6 DV EE Y level ............................................................................... 3-4
3.4 AUDIO CIRCUIT ............................................................................... 3-4
3.4.1 Audio REC FM ............................................................................. 3-4
3.5 SYSCON CIRCUIT ........................................................................... 3-4
3.5.1 Timer clock ................................................................................... 3-4
ELECTRICAL ADJUSTMENT (DV)
3.6 PREPARATION ................................................................................. 3-5
3.6.1 Precautions .................................................................................. 3-5
3.6.2 Equipment required for adjustment .............................................. 3-5
3.6.3 Tools required for adjustments ..................................................... 3-5
3.6.4 Setup ............................................................................................ 3-5
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM ..................................................... 4-1
CIRCUIT BOARD NOTES ..................................................................... 4-2
4.1 BOARD INTERCONNECTIONS ....................................................... 4-3
4.2 SWITCHING REGULATOR SCHEMATIC DIAGRAM ....................... 4-5
4.3 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM .............................. 4-7
4.4 MAIN (VHS SYSCON) SCHEMATIC DIAGRAM .............................. 4-9
4.5 MAIN (TUNER) SCHEMATIC DIAGRAM ....................................... 4-11
4.6 MAIN (VIDEO I/O & SUB EMPHA) SCHEMATIC DIAGRAM .................. 4-13
4.7 MAIN (AUDIO I/O) SCHEMATIC DIAGRAM ................................... 4-15
4.8 MAIN (CONNECTION) SCHEMATIC DIAGRAM ............................ 4-17
4.9 3D DIGITAL/2M SCHEMATIC DIAGRAM ....................................... 4-19
4.10 TERMINAL (S-SUB) SCHEMATIC DIAGRAM .............................. 4-21
4.11 TERMINAL (I/O) SCHEMATIC DIAGRAM .................................... 4-23
4.12 DEMODULATOR SCHEMATIC DIAGRAM ................................... 4-25
4.13 POWER SW, SW/DISPLAY AND JOG SCHEMATIC DIAGRAMS ................... 4-27
4.14 DV MSD SCHEMATIC DIAGRAM ................................................ 4-29
4.15 DV MAIN SCHEMATIC DIAGRAM ............................................... 4-31
4.16 DV I/O SCHEMATIC DIAGRAM ................................................... 4-33
4.17 DV V OUT SCHEMATIC DIAGRAM ............................................. 4-35
4.18 DV PRE/REC SCHEMATIC DIAGRAM ........................................ 4-37
4.19 DV REG SCHEMATIC DIAGRAM ................................................ 4-39
4.20 DV AUDIO AD/DA SCHEMATIC DIAGRAM ................................. 4-40
4.21 MAIN(ON SCREEN) SCHEMATIC DIAGRAM ............................. 4-41
4.22 REMOTE CONTROL SCHEMATIC DIAGRAM ............................ 4-42
4.23 SWITCHING REGULATOR CIRCUIT BOARD ............................. 4-43
4.24 MAIN CIRCUIT BOARD ................................................................ 4-45
4.25 3D DIGITAL/2M CIRCUIT BOARD ............................................... 4-48
4.26 DEMODULATOR POWER SW, SW/DISPLAY AND JOG CIRCUIT BOARDS ... 4-49
4.27 TERMINAL CIRCUIT BOARD ....................................................... 4-51
4.28 DV MAIN CIRCUIT BOARD .......................................................... 4-53
4.29 WAVEFORMS ............................................................................... 4-55
4.30 VOLTAGE CHARTS ...................................................................... 4-57
4.31 FDP GRID ASSIGNMENT AND ANODE CONNECTION ................. 4-59
4.32 CPU PIN FUNCTION .................................................................... 4-60
4.33 SYSTEM CONTROL BLOCK DIAGRAM (VHS) ........................... 4-61
4.34 VIDEO BLOCK DIAGRAM(VHS) .................................................. 4-63
4.35 AUDIO BLOCK DIAGRAM (VHS) ................................................. 4-67
4.36 SYSTEM CONTROL BLOCK DIAGRAM (DV) ............................. 4-69
4.37 VIDEO BLOCK DIAGRAM (DV) ................................................... 4-71
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ............................ 5-1
5.2 FINAL ASSEMBLY <M2> .................................................................. 5-2
5.3 MECHANISM ASSEMBLY (VHS) <M3> ........................................... 5-4
5.4 MECHANISM ASSEMBLY (DV) <M4> .............................................. 5-6
5.5 ELECTRICAL PARTS LIST ............................................................... 5-8
SW REGULATOR BOARD ASSEMBLY <01> ........................................ 5-8
MAIN BOARD ASSEMBLY <03> ............................................................ 5-9
3D DIGITAL/2M BOARD ASSEMBLY <05> .......................................... 5-17
TERMINAL BOARD ASSEMBLY <06> ................................................. 5-19
AUDIO CONTROL HEAD BOARD ASSEMBLY <12> .......................... 5-20
DEMOD BOARD ASSEMBLY <14> ...................................................... 5-20
POWER SW BOARD ASSEMBLY <27> ............................................... 5-21
SW/DISPLAY BOARD ASSEMBLY <28> ............................................. 5-21
DV MAIN BOARD ASSEMBLY <50> .................................................... 5-22
LOADING MOTOR BOARD ASSEMBLY <55> ..................................... 5-27
JOG BOARD ASSEMBLY <85> ............................................................ 5-27
The following table lists the differing points between models HR-DVS3EK and HR-DVS3EU.
MODEL
HR-DVS3EK
ITEM
HR-DVS3EU
POWER PLUG
3PIN(CLASS II)
CEE(CLASSII)
VIDEO SYSTEM
PAL/NTSC ON PAL TV
PAL/MESECAM(MANUAL)/NTSC ON PAL TV
BROADCASTING STANDARD
I
B/G, D/K
STEREO DECODER
NICAM
NICAM/A2
VCR PLUS+
VIDEO PLUS+ DELUXE
SHOWVIEW DELUXE
LANGUAGE[INITIAL](ON SCREEN DISPLAY)
ENGLISH
10 LANGUAGE [E]


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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.
Fig.1
1. Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and com-
ply with these and other cautionary notices appearing in the
operation and service manuals.
2. Parts identified by the
symbol and shaded (
) parts are
critical for safety.
Replace only with specified part numbers.
Note: Parts in this category also include those specified to com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape
3) Spacers
5) Barrier
2) PVC tubing
4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Power cord
Fig.2
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
ode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in or-
der to prevent safety hazards, perform carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
Fig.7
cut close to connector
Fig.3
(2) Strip about 15 mm of the insulation from the ends of
the wires. If the wires are stranded, twist the strands to
avoid frayed conductors.
15 mm
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Connector
Metal sleeve
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the
metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.
1
Precautions during Servicing
7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or
pointed parts.
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
1.25
2.0
5.5
Crimping tool
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Crimped at approx. center
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm
S40888-01


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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.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d') be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs
and externally exposed accessible parts (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessi-
ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and
following table 2.
5. Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
d'
d
Chassis
Power cord,
primary wire
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z
0.1 ohm
Z
0.5 ohm
AC inlet
Earth pin
Exposed accessible part
Milli ohm meter
Grounding Specifications
Fig. 10
ab
c
V
Externally
exposed
accessible part
Z
Fig. 9
Fig. 8
Clearance Distance (d), (d')
d, d'
3 mm
d, d'
4 mm
d, d'
3.2 mm
1 M
R 12 M/500 V DC
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Japan
USA & Canada
Europe & Australia
R
10 M
/500 V DC
Region
Insulation Resistance (R)
R
1 M
/500 V DC
AC 3 kV 1 minute
(Class
2)
AC 1.5 kV 1 minute
(Class
1)
d
4 mm
d'
8 mm (Power cord)
d'
6 mm (Primary wire)
Table 1 Specifications for each region
a, b, c
Leakage Current (i)
AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Japan
USA & Canada
i
1 mA rms
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
i
0.5 mA rms
i
0.7 mA peak
i
2 mA dc
i
0.7 mA peak
i
2 mA dc
Europe & Australia
Region
Load Z
1 k
2 k
1.5 k
0.15
µF
50 k
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
2
S40888-01