JVC HMHDS-1-U Service manual
SERVICE MANUAL
HDD / VHS DUAL RECORDER
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
Head office
East Coast
Midwest
West Coast
Atlanta
Hawaii
1700 Valley Road Wayne, New Jersey 07470-9976
:
10 New Maple Avenue Pine Brook, New Jersey 07058-9641
:
705 Enterprise Street Aurora, Illinois 60504-8149
:
5665 Corporate Avenue Cypress, California 90630-0024
:
1500 Lakes Parkway Lawrenceville, Georgia 30043-5857
:
2969 Mapunapuna Place Honolulu, Hawaii 96819-2040
:
(973)315-5000
(973)396-1000
(630)851-7855
(714)229-8011
(770)339-2582
(808)833-5828
JVC CANADA INC.
Head office
Montreal
Vancouver
:
21 Finchdene Square Scarborough, Ontario M1X 1A7
:
16800 Rte Trans-Canadienne, Kirkland, Quebec H9H 5G7
:
13040 Worster Court Richmond, B.C. V6V 2B3
(416)293-1311
(514)871-1311
(604)270-1311
S40895-03
HM-HDS1U
No. 82853
HM-HDS1U
1
2
123
4 56
3
789
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0
<
>
1
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–
SPECIFICATIONS
GENERAL
Power requirement : AC 120 V`, 60 Hz
Power consumption
Power on : 45 W
Power off : 14 W
Temperature
Operating : 5°C to 40°C (41°F to 104°F)
Storage : –20°C to 60°C (–4°F to 140°F)
Operating position : Horizontal only
Dimensions (WxHxD) : 435 mm x 124 mm x 385 mm
Weight : 7.4 kg (16.4 lbs)
Input/Output : RCA connectors: (IN x 1, OUT x 2)
HDD DECK VIDEO/AUDIO
Video format : MPEG2 (VBR)
Audio format : MPEG1 Layer2
Maximum recording time
(SP) : 14 hours
(LP) : 20 hours
(EP) : 28 hours
(SEP) : 40 hours
VHS DECK VIDEO/AUDIO
Signal system : NTSC-type colour signal and EIA monochrome
Recording system :
Format : S-VHS/VHS NTSC standard
Signal-to-noise ratio : 45 dB
Horizontal resolution : 240 lines (VHS)
Frequency range : 70 Hz to 10,000 Hz (Normal audio)
Maximum recording time
(SP) : 210 min. with ST-210 video cassette
(EP) : 630 min. with ST-210 video cassette
(17-1/16" x 4-15/16" x 15-3/16")
S-Video connectors:(IN x 1, OUT x 2)
signal, 525 lines/60 fields
DA4 (Double Azimuth) head helical scan system
400 lines (S-VHS)
20 Hz to 20,000 Hz(Hi-Fi audio)
POWER
HM-HDS1
+
OK
MENU
REC LINK
NAVI
CH
STOP PLAY PAUSE REC
HDD
DIGITPURE TECHNOLOGY
S-VHS ET
S-VHS
REW FEW
A. DUB
EJECT
(M) L – AUDIO – R
VIDEO
S-VIDEO
PAUSE
F - 1
TUNER
Tuning system : Frequency-synthesized tuner
Channel coverage
VHF : Channels 2–13
UHF : Channels 14–69
CATV : 113 Channels
TIMER
Clock reference : Quartz
Program capacity : 1-year programmable timer/
16 programs each on the VHS and
HDD deck
Memory backup time : Approx. 60 min.
ACCESSORIES
Provided accessories : RF cable (F-type),
Infrared remote control unit, “AA”
battery x 2,
Audio/Video Cable,
S-Video cable (4-pin),
Controller
Specifications shown are for SP mode unless otherwise specified.
E. & O.E. Design and specifications subject to change without notice.
Printed in Japan
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
No. 82853
April 2001
Hard Disk Drive (HDD)
1. Hard Disk Drive (HDD) Handling Precautions
The HDD is a precision device for use in reading and writing a large amount of data on or from a disk rotating at
a high speed. If it is not handled carefully, either abnormal operation may result or it may not be possible to read
data. The HDD is sensitive to the following items and special care is required in safeguarding against them when
handling an HDD. Also take care in handling a set incorporating an HDD.
1. Vibrations and impacts
2. Static electricity
3. Rough handling
1.1 Handling in transport, etc.
s Be sure to place the HDD in the manufacturer's specified package
carton before transport.
s When receiving a package containing an HDD, check that the pack-
age carton is not damaged (such as having holes in the carton,
crushed corners, etc.).
s Do not impact the packaging carton when loading or unloading it.
s It is not permitted to use the inner package carton only for transport-
ing an HDD.
s Do not stack package cartons one upon another.
Be sure to package and
transport the HDDs correctly.
HDD
Do not throw or
drop packages.
1.2 Handling an HDD in the stand-alone status
s When handling an HDD on a hard workbench, place an antistatic
mat (rubber sheet) or similar object on the hard surface (to prevent
any impacts occurring between the HDD and bench).
s Do not stack the HDDs one upon another.
s Do not knock an HDD with a hard object (such as a screwdriver).
s Do not place an HDD on its side panel without using a support (do
not place an HDD in an unstable position).
1.3 Handling the installation of an HDD
s Place antistatic mats or similar sheets on all of the surfaces on which work is conducted or when the HDD
is transported.
s Do not permit the HDD to knock against the set's brackets.
s When screwing the brackets, be careful not to knock the HDD. When using a power screwdriver, use a low-
shock model and arrange the tightening torque properly.
s When mounting an HDD in a HDD/VHS DUAL RECORDER, take care not to apply excessive force to the
brackets.
1
2. In Case of an HDD Failure
When a HDD/VHS DUAL RECORDER AC cord is plugged into a power outlet, the boot loader is read from the
IC8204 (8M FLASH ROM), which activates the HDD and reads the system files in the HDD before getting ready
for operation. In consequence, the computer cannot be turned on if the HDD fails.
In case a failure of the HDD is in doubt, use the following procedure to switch the main power of the set ON using
the VHS section alone, by bypassing the HDD operation check.
(1) With the HDD/VHS DUAL RECORDER in the remote control
standby status, transmit code 7b from the remote jig for more
than 2 seconds.
(2) The REC LINK button on the computer blinks, indicating that
the power supply can be switched ON.
(3) When the code 7B is transmitted again from the remote jig,
the button stops blinking and its function is canceled.
<Reference>
VHS
SYSCON
KBUS_IN
KBUS_OUT
E:08 is displayed in the
case of a
communication error
with the VHS SYSCON
HOSTDATA
40GB
HDD
AD 4:19
Firmware
HDD driver
Navigation information
AD 0:15
IDE 40PIN
AD 16:31
DVD 0_:7_
IC8204
8M FLASH
boot loader
VHS Navi
back up
OPEN
IC8205
Custom code
43: A code
52: B code
Data code
POWER
HM-HDS1
IC8206
LADO
4:11
LADO
12:19
IC8207
Latch
Address
Latch
Address
OK
AD 4:11
AD 12:19
Initial mode
BS DIGIATL
HDD
Blinks.
CHANNEL
AD 0:31
IC8201IC8001
ASIC_IF MPEG_DEC
VIO 0:7
2
TABLE OF CONTENTS
Section Title Page Section Title Page
Hard Disk Drive (HDD)
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 SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES .. 1-1
1.5 HOW TO REMOVE THE MAJOR PARTS <COM section> ........................... 1-2
1.5.1 Disassembly flow chart .................................................................. 1-2
1.5.2 Disassembly/assembly method <COM section> ............................ 1-2
1.6 HOW TO REMOVE THE MAJOR PARTS <VHS section> ............................ 1-4
1.6.1 Disassembly flow chart .................................................................. 1-4
1.6.2 DIsassembly/assembly method <VHS section> ............................ 1-4
1.7 HOW TO REMOVE THE MAJOR PARTS <HDD section> ............................ 1-6
1.7.1 Disassembly flow chart .................................................................. 1-6
1.7.2 DIsassembly/assembly method <HDD section> ............................ 1-6
1.8 SERVICE POSITIONS .................................................................................. 1-7
1.8.1 Service position <VHS SIDE> ........................................................1-7
1.8.2 Service position <HDD side> ......................................................... 1-8
1.9 MECHANISM SERVICE MODE .................................................................... 1-9
1.9.1 How to set the "MECHANISM SERVICE MODE" .......................... 1-9
1.10 CONNECTION .................................................................................. 1-10
1.11 EMERGENCY DISPLAY FUNCTION................................................ 1-12
1.11.1 Displaying the emergency information ........................................ 1-12
1.11.2 Clearing the emergency history ...................................................1-12
1.11.3 Emergency content description ................................................... 1-13
1.11.4 Emergency detail information 1 ................................................. 1-14
1.11.5 Emergency detail information 2 ................................................. 1-15
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
Change Lever Assembly, Direct Gear, Clutch Gear and Coupling Gear
2.2.12
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
Loading Arm Gear (supply or take-up side) and Loading Arm Gear Shaft
2.2.16
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
Main Brake Assembly (take-up side), Reel Disk (take-up side) and
2.2.20
Main Brake Assembly (supply side)....................................................
Tension Brake Assembly, Reel Disk (supply side) and Tension Arm Assembly
2.2.21
2-13
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
Checking/Adjustment of the Height and Tilt of the Audio Control Head
2.3.2
Checking/Adjustment of the Audio Control Head Phase (X-Value) ..
2.3.3
2-17
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
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 level ....................................................................................... 3-3
3.3.3 PB Y level (S-VHS / VHS) .............................................................. 3-3
3.3.4 REC color (colour) level ................................................................. 3-3
3.3.5 Video EQ (Frequency response) .................................................... 3-4
3.3.6 AUTO PICTURE initial setting ........................................................ 3-4
3.4 DIGITAL CIRCUIT ......................................................................................... 3-4
3.4.1 HDD EE Y level .............................................................................. 3-4
3.4.2 HDD PB Y level .............................................................................. 3-5
3.4.3 HDD PB C burst level ..................................................................... 3-5
3.5 AUDIO CIRCUIT ........................................................................................... 3-5
3.5.1 Audio REC FM ............................................................................... 3-5
3.6 DEMODULATOR CIRCUIT ........................................................................... 3-6
3.6.1 Input level .......................................................................................3-6
3.6.2 Stereo VCO .................................................................................... 3-6
3.6.3 Stereo filter .....................................................................................3-6
3.6.4 Separation - 1 ................................................................................. 3-6
3.6.5 Separation - 2 ................................................................................. 3-7
3.6.6 SAP VCO ....................................................................................... 3-7
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 AND REGULATOR SCHEMATIC DIAGRAMS ...........
4.3 VIDEO/AUDIO SCHEMATIC DIAGRAM ....................................................... 4-7
4.4 SYSTEM CONTROL SCHEMATIC DIAGRAM ............................................. 4-9
4.5 VIDEO I/O SWITCH SCHEMATIC DIAGRAM ............................................ 4-13
4.6 AUDIO I/O SCHEMATIC DIAGRAM ............................................................ 4-15
4.7 CONNECTION SCHEMATIC DIAGRAM .................................................... 4-17
4.8 TUNER SCHEMATIC DIAGRAM ................................................................ 4-19
4.9 3D DIGITAL/2M SCHEMATIC DIAGRAM ................................................... 4-21
4.10 TERMINAL SCHEMATIC DIAGRAM ........................................................ 4-23
4.11 DEMODULATOR SCHEMATIC DIAGRAM ............................................... 4-25
4.12 S-SUB SCHEMATIC DIAGRAM ............................................................... 4-27
4.13 ON SCREEN SCHEMATIC DIAGRAM ..................................................... 4-29
4.14
EJECT SW, DIAPLAY, JACK, LED/SW AND LED SCHEMATIC DIAGRAMS ..
4.15 DIGITAL P.SUP SCHEMATIC DIAGRAM .................................................. 4-33
4.16 DIGITAL VIDEO SCHEMATIC DIAGRAM ................................................. 4-35
4.17 DIGITAL AUDIO SCHEMATIC DIAGRAM ................................................ 4-37
4.18 DIGITAL MPEG DEC SCHEMATIC DIAGRAM ......................................... 4-39
4.19 DIGITAL MPEG ENC SCHEMATIC DIAGRAM ......................................... 4-41
4.20 DIGITAL ASIC IF SCHEMATIC DIAGRAM ............................................... 4-43
4.21 SWITCHING REGULATOR AND REGULATOR CIRCUIT BOARDS ....... 4-45
4.22 3D DIGITAL/2M AND S-SUB CIRCUIT BOARDS .................................... 4-47
4.23 TERMINAL CIRCUIT BOARD .................................................................. 4-48
4.24 EJECT SW, DISPLAY, LED/SW, JACK AND LED CIRCUIT BOARDS ..... 4-49
4.25 MAIN CIRCUIT BOARD ........................................................................... 4-51
4.26 DEMODULATOR AND ON SCREEN CIRCUIT BOARDS ........................ 4-54
4.27 DIGITAL CIRCUIT BOARD ....................................................................... 4-55
4.28 FDP GRID ASSIGNMENT AND ANODE CONNECTION ........................ 4-58
4.29 REMOTE CONTROL SCHEMATIC DIAGRAM ........................................ 4-58
4.30 WAVEFORMS ........................................................................................... 4-59
4.31 VOLTAGE CHARTS .................................................................................. 4-61
4.32 CPU PIN FUNCTION ................................................................................ 4-64
4.33 SYSTEM CONTROL BLOCK DIAGRAM (VHS) ....................................... 4-65
4.34 AUDIO BLOCK DIAGRAM ........................................................................ 4-67
4.35 VIDEO BLOCK DIAGRAM(VHS) .............................................................. 4-69
4.36 VIDEO/AUDIO BLOCK DIAGRAM (HDD) ................................................ 4-73
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ....................................... 5-1
5.2 FINAL ASSEMBLY <M2> ............................................................................. 5-2
5.3 MECHANISM ASSEMBLY <M3> .................................................................. 5-4
5.4 ELECTRICAL PARTS LIST ........................................................................... 5-6
4-5
4-31
SW REGULATOR BOARD ASSEMBLY <01> ........................................... 5-6
REGULATOR BOARD ASSEMBLY <02> ................................................. 5-7
MAIN BOARD ASSEMBLY <03> .............................................................. 5-8
3D DIGITAL/2M BOARD ASSEMBLY <07> ............................................ 5-15
TERMINAL BOARD ASSEMBLY <06> ................................................... 5-16
A/C HEAD BOARD ASSEMBLY <12> .................................................... 5-17
DEMOD BOARD ASSEMBLY <14> ........................................................ 5-17
S-SUB BOARD ASSEMBLY <15> .......................................................... 5-17
ON SCREEN BOARD ASSEMBLY <17> ................................................ 5-18
EJECT SW BOARD ASSEMBLY <27> ................................................... 5-19
SW/DISPLAY BOARD ASSEMBLY <28> ................................................ 5-19
JACK BOARD ASSEMBLY <36> ............................................................ 5-20
LED/SW BOARD ASSEMBLY <47> ....................................................... 5-20
DIGITAL BOARD ASSEMBLY <50> ........................................................ 5-20
LOADING MOTOR BOARD ASSEMBLY <55> ....................................... 5-25
LED BOARD ASSEMBLY <90> .............................................................. 5-25
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.
Precautions during Servicing
•
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 comply 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.
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 order 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).
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.1
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.
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 cathode 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.
Fig.4
(3) Align the lengths of the wires to be connected. Insert the
wires fully into the connector.
Metal sleeve
Connector
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
.2
5
2
.0
5
.5
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Fig.7
Crimping tool
Crimped at approx. center
of metal sleeve
Conductors extended
I
S40888-01
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 compliance 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’) between soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
Fig. 8
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 accessible
parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following
table 2.
Externally
exposed
accessible part
Fig. 9
Z
V
ab
A
c
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.
Fig. 10
Table 1 Specifications for each region
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.
II
S40888-01
SECTION 1
DISASSEMBLY
1.1 HOW TO REMOVE THE MAJOR PARTS
1.1.1 Introduction
This set is a double-deck video recorder integrating a HDD
(Hard Disk Drive) and a VHS deck. Its internal structure is divided into three sections that include the power supply, VHS
and HDD sections. Therefore, the removal of major parts will
also be described under three separate sections as listed below.
1. COMMON section
2. VHS section
3. HDD section
< TOP VIEW >
1. COMMON section
3. HDD section
2. VHS section
Fig. 1-1-1
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY
Step/
Loc No.
1
Top cover, Bracket COM1
Front panel
2
assembly
Fig. No.
4(S1), 3(S2), 2(L1), (L2)
2(S3)
COM2 8(L3),
CN7507(WR1),
CN3011(WR2)
Point NotePart name
—
<Note
1,2,3,4>
§§ §§ §
(1) (2) (3) (4) (5)
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (location) No.
of parts Figures.
(2) Part name to be removed or installed.
(3) Fig. No. showing procedure or part location.
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder,
CN**(WR**)= Remove the wire (WR**) from the connector
(CN**).
Note:
• The bracketed ( ) WR of the connector symbol are as-
signed nos. in priority order and do not correspond to
those on the spare parts list.
(5) Adjustment information for installation
1.3 DISCONNECTION OF CONNECTORS (WIRES)
FPC
CONNECTOR
FPC
CONNECTOR
Fig. 1-3-1 Fig. 1-3-2
FPC
CONNECTOR
FPC
CONNECTOR
Fig. 1-3-3 Fig. 1-3-4
FPC
CONNECTOR
Fig. 1-3-5
1.4 SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES
Table 1-4-1 below shows the symbols, shapes, colors and
part numbers of screw that are used in the cabinet components and board assemblies and are appearing in the disassembling/reassembling diagrams in this manual.
When screwing them again in reassembling, be sure to use
them correctly referring to the following table.
Notes:
• Screw that are asterisked (marked with*) in the shape col-
umn are fixed with screw lock agent. If such the screw is
once removed, never use it again.
• The Screw symbols are assigned nos. in priority order and
do not correspond to those on the spare parts list.
SYMBOL PARTS NO. COLOR
S1 QYTDST3006R SILVER BLACK
S2 QYTDST3006M BLACK
S3 QYTDSF3010Z GOLD
S4 QYTDSF2606Z GOLD
S5 QYTDST3006Z GOLD
S6 QYTDST3005M GOLD
S7 QYTDSF3008M BLACK
S8 QYTDST2610Z GOLD
S9 PQ40413 BLACK
S10 LP40700-001A BLACK
S11 QYTDSP2004Z GOLD
Table 1-4-1
1-1
HOW TO REMOVE THE MAJOR PARTS <COM section>
1.5
1.5.1 Disassembly flow chart
This flowchart shows the disassembly procedure for the exterior parts and electrical parts.
Basically, reverse this procedure when assembling them.
1 Top cover, Bracket
2 Front panel assembly
Display board assembly, LED/SW board assembly,
3
Eject SW board assembly, Jack board assembly,
LED board assembly
4 SW REG board assembly
5 Regulator board assembly
6 Rear cover
Disassembly/assembly method <COM section>
1.5.2
Step/
Loc No.
Top cover, Bracket COM1
1
Front panel
2
assembly
Fig. No.
4(S1), 3(S2), 2(L1), (L2)
2(S3)
COM2 8(L3),
CN7507(WR1),
Point NotePart name
—
<Note
1,2,3,4>
CN3011(WR2)
Display board assembly,
3
LED/SW board assembly,
Eject SW board assembly,
COM3 15(S4)
—
Jack board assembly,
LED board assembly
SW REG board
4
assembly
Regulator board
5
assembly
COM4 2(S5), 2(L4), (L5)
CN5301(WR3),
COM5 3(L6),
CN5322(WR4),
CN5321(WR5),
<Note 1,
5>
<Note 1,
4>
CN5325(WR6),
CN5326(WR7),
CN5323(WR8)
6
COM6 4(S2), 3(S6),
Fan motor
<NOTE 5>Rear cover
<Note 1>
When attaching the FPC, be sure to connect it in the correct orientation.
<Note 2>
When attaching the front panel assy, make sure that the
door openers of cassette housing assembly is in the down
position.
<Note 3>
When attaching the FPC take care that it is not caught.
Pass the two VHS-side FPCs below the base (1).
<Note 4>
When removing the SW REG board assembly or Regulator board assembly, unhook the several spacers connecting it with pliers from the top side.
<Note 5>
Perform the work by leaving fan motor attached to the rear
cover except when replacing the fan motor.
When attaching the rear cover, please be careful with the
wiring.
1
(S1)
(L3)
(L1)
(L3)
2
(S1)
Digital board
assembly
Base (1)
(L3)
(L2)
8
(S3)
Top cover
1
CN3011
<Note 3>
WR2
(S2)
9
(S3)
1
Fig. COM1
Fig. COM2
6
Bracket
WR1
(L3)
2
5
(S2)
3
(S1)
CN7507
<Note 1>
Supporing
tape side
(S2)
4
(S1)
<Note 2>
7
1-2
<Note 5>
Fan motor
6
28
(S2)
30
(S2)
33
(S6)
29
(S2)
34
(S6)
31
(S2)
35
(S6)
24
5
CN5325
CN5326
WR8
WR5
Foil side
<Note 1>
WR4
Foil side
<Note 1>
WR6
WR7
CN5321
CN5322
(L6)
Spacer
<Note 4>
(L6)
Spacer
<Note 4>
CN5323
(S4)
23
(S4)
(S4)
22
(S4)
2
3
Eject SW
board assembly
Jack
board assembly
12
(S4)
LED/SW
board assembly
11
10
(S4)
(S4)
LED board assembly
Display board
assembly
21
17
(S4)
16
(S4)
15
(S4)
(S4)
18
(S4)
19
20
(S4)
14
(S4)
13
(S4)
(L5)
26
(S5)
Fig. COM3
27
(S5)
Fig. COM5
WR3
Supporting
tape side
<Note 1>
4
CN5301
(L4)
Spacer
<Note 5>
Fig. COM4
Fig. COM6
1-3
HOW TO REMOVE THE MAJOR PARTS <VHS section>
1.6
1.6.1 Disassembly flow chart
This flowchart shows the disassembly procedure for the exterior parts and electrical parts.
Basically, reverse this procedure when assembling them.
However, it is required to remove the common section parts
as far as 1 “Top cover Bracket” and 2 “Front panel assembly” in advance. (See section 1.5.)
1 Drum assembly
2 Mechanism assembly
3 Main board assembly
4 Base (1)
Procedures for Lowering the Cassette holder assembly
As the mechanism of this unit is integrated with the Housing
assembly, the holder must be lowered and the two screws unscrewed when removing the Mechanism assembly.
Fig. 2
Fig. 1
1.6.2 DIsassembly/assembly method <VHS section>
Step/
Loc No.
Drum assembly
1
(Inertia plate)
(Roller arm assy)
2
Mechanism
assembly
Main board
3 <Note 2>
assembly
Base (1) V4 (S3), 3(S5)4 —
Fig. No.
V1
3(S7), CON1(WR9),
CN1(WR10)
4(L1)
(P1), (L2)
V2
2(S3), (S9), (S10),
(L3), (L4),
CN1(WR11),
V3 2(S3), (S5),
CN5321(WR5),
CN5322(WR4),
CN3014(WR14),
CN703(WR15),
CN2601(WR16)
Point NotePart name
<Note 1,2>
<Note 2,4>
<Note 1>
When attaching or removing the FPC, take care not to disconnect any of the wires.
<Note 2>
When attaching the FPC, be sure to connect it in the correct orientation.
<Note 3>
When attaching wires, connect them in the correct orientation.
Fig. 3
Turn the loading motor pulley in the direction as indicated by
Fig.2. As both A and B levers are lodged twice, push the
levers in the direction as indicated by Fig.3 to release them.
When pushing the levers, do it in the order of A , B , B , A .
When the holder has been lowered, turn the pulley until the
cassette holder is securely in place without allowing any up/
down movement.
Procedures for Lowering the Cassette holder assembly
Note: When installing the Drum assembly, secure the
screws (S7) in the order of a , b , c .
Roller arm
assy
Inertia plate
(L1)
(P1)
(L2)
(S7)
1
a
2
(S7)
WR9
Foil side
c
<Note 2>
CON1
3
(S7)
b
WR10
Foil side
<Note 1,2>
1
Cleaner assy
<Note 4>
• When it is required to remove the screws (S3) retaining the
Mechanism assembly, please refer to the “Procedures for
Lowering the Cassette holder assembly”(See on page 1-5).
• When removing the Mechanism assembly only, unhook the
two spacers connecting it with the Main board assembly with
pliers from the back side of the Main board assembly first,
and then remove the Mechanism assembly.
• When reattaching the Mechanism assembly to the Main
board assembly, take care not to damage the sensors on
the Main board assembly (D3001: LED, Q3002: Start sensor, Q3003: End sensor, S3002: S cassette switch).
1-4
Not use
CN1
Fig. V1
8
(S3)
10
(S5)
9
(S3)
WR16 Foil side
<Note 2>
CN5322
CN703
WR15
CN2601
CN3014
WR4
Foil side
<Note 2>
WR5
Foil side
<Note 2>
WR14
Foil side
<Note 2>
CN5321
3
Note: When installing the Mechanism assembly, secure
the screws (S8) in the order of a , b .
6
5
(S3)
<Note 4>
(S9)
4
(S3)
<Note 4>
WR11
Foil side
<Note 2>
(S10)
7
2
(L4)
Spacer
<Note 4>
12
(S5)
Fig. V3
13
(S5)
4
14
(S5)
Mechanism assy
<Note 4>
Spacer
(L3)
Spacer
<Note 4>
Fig. V2
S3002
S cassette switch
<Note 4>
11
(S3)
Fig. V4
1-5
Hard Disk Drive (HDD) Handling Precautions
The HDD is a precision device for use in reading and writing
a large amount of data on or from a disk rotating at a high
speed. If it is not handled carefully, either abnormal operation may result or it may not be possible to read data. The
HDD is sensitive to the following items and special care is
required in safeguarding against them when handling an
HDD. Also take care in handling a set incorporating an HDD.
1 Hard disk drive assembly
2 Hard disk
3 Digital board assembly
1.7
HOW TO REMOVE THE MAJOR PARTS <HDD section>
1.7.1 Disassembly flow chart
This flowchart shows the disassembly procedure for the exterior parts and electrical parts.
Basically, reverse this procedure when assembling them.
However, it is required to remove the common section parts
as far as 1 “Top cover” and 2 “Front panel assembly” in advance. (See section 1.5.)
1 Hard disk drive assembly
1
(S5)
1
<Note 1>
(S5)
2
WR7
Frame
CN8001
3
(S5)
Fig. H1
(S5)
4
WR15
Earth
wire
<Note 2>
CN5326
2 Hard disk drive
3 Digital board assembly
1.7.2 DIsassembly/assembly method <HDD section>
Step/
Loc No.
1
Hard disk drive
assembly
2
Hard disk drive H2
3
Digital board
assembly
Fig. No.
H1 4(S5),
H3 4(S5),
Point NotePart name
<Note 1,2>
CN5326(WR15)
4(S11)
<Note 3,4>
CN8901(WR8),
CN8002(WR12),
CN8601(WR13),
CN8801(WR14)
<Note 1>
With due regard to operational considerations, remove the
parts located on the frame (Hard disk drive) together before removing the major parts.
<Note 2>
When attaching the hard disk drive assembly, be sure to
connect the earth wire.
<Note 3>
• When connecting or disconnecting the connector or wire,
take care not to damage them.
• When connecting the flat wire to the connector, be sure
to connect it in the correct orientation.
<Note 4>
When removing the board assembly, take care not to damage it.
(S5)
9
3
10
(S5)
CN8901
CN8002
Frame
CN8601
<Note 4>
12
(S5)
CN8801
2
5
(S11)
11
(S5)
6
(S11)
Fig. H2
7
(S11)
8
(S11)
WR13
WR8
WR12
Foil side
<Note 3>
WR14
Supporting
tape side
<Note 3>
1-6
Fig. H3
1.8 SERVICE POSITIONS
The servicing locations for use in troubleshooting or servicing of the set are provided separately for the VHS and HDD.
I SERVICE POSITIONS <VHS SIDE>
II SERVICE POSITIONS <HDD SIDE>
1.8.1 Service position <VHS SIDE>
<Removal>
(1) Remove the top cover and bracket.
(2) Remove the front panel assembly.
(3) Remove the MAIN board assembly together with the
mechanism assembly.
Fig. No.
(Page)
(1)
Top cover,
COM1 9 2 + 1
Bracket (1-3) (No.1-9) (L1,2)
(2) Front
panel
COM2 0 8 2
(1-3) (L3) (CN7507/ —
assembly
(3) Rear
cover
(4) Main
board
COM6 7 0 1
(1-3)
V2, V3 7 0 5
(1-6) (No.4-10) (CN5321/
assembly
(etc.)
Screw Hook, etc. Connector Note
0 —
CN3011)
(No.28-35)
(CN5325)
CN5322/
CN3014/
—
—
CN703/
CN2601)
< Installation >
(1) Stand up the bottom chassis assembly so that the Regu-
lator side is in the lower position.
(2) Connect the PATCH CORD to the three FPCs then con-
nect CN3014, CN7508 and CN7509.
(3) By connecting a total of two FPCs and wires (CN703/
CN2601), carry out the installation so that the Main board
assembly comes in the upper position.
Point: • Take care that the FPCs and wires are not
subjected to stress in this positioning.
(4) Connect the PATCH CORDS to the two FPCs of the front
panel assembly, then connect the CORDS to the
CN7507/CN3011.
For the PATCH CORD is required, see Table 1-8-2.
Board to Board WIRE
A PTU94022-10 QUQ112-1040CG
B PTU94022-18 QUQ112-1840CG
C PTU94022-11 QUQ212-1140CG
D PTU94022-15 QUQ212-1540CG
E YTU94072-06 QUQ210-0640CG
Table 1-8-2
Table 1-8-1
PATCH CORD
PTU94017B
Front panel assembly
Main board assembly
CN7509
CN7507
A
1
CN3011
CN3014
B
2
CN703
E
CN7508
CN2601
6
7
D
C
3
CN8801
4
CN5322
5
CN5321
CN8601
CN8002
Fig. 1-8-1 Service position <VHS side>
1-7
1.8.2 Service position <HDD side>
(1) Remove the exterior parts (Top cover and front panel as-
sembly).
(2) Remove the hard disk drive(HDD) together with the frame.
(3) Remove the digital board assembly together with the wires
attached to it, and place the assembly upside down on
an insulated mat that is placed on the mechanism (VHS)
assembly.
(4) Mount the HDD that was removed in (2) to its original
position on the bottom chassis assembly, and connect
the wires to the connector CN8001 on the digital board
assembly and to the connector CN5326 on the regulator
board assembly.
Fig. No.
(Page)
Screw
(No.)
Hooks,
etc. (No.)
Connectors
Note
(1) Top cover, COM1 9 2 + 1 0 —
Brackets (1-3) (No.1-9) (L1, L2)
(2) Front panel COM2 0 8 (L3)
2(CN7507,
—
assembly (1-3) CN3011)
Hard disk drive
(3)
H1 4 0
2 (CN8001,
—
assembly (1-6) (No.1-4) CN5326)
(4) Digital board H3 4 0 0 —
assembly
(No.9-12)
Table 1-8-3
PATCH CORD
PTU94017B
Hard disk drive
assembly
Front panel assembly
6
CN3011
CN8001
7
CN8801
3
A
1
10
CN8601
CN7507
8
9
B
2
Fig. 1-8-2 Service position <HDD side>
CN8901
Insulation sheet
CN8002
Digital board
assembly
Note :
•
The symbol numbers in the following table are special numbers indicating the service positions. They do not coincide with the symbol numbers used in Fig. 1-10-1 (1-10) or Table 1-10-1 (1-11).
SYMBOL CONNECTOR (WIRE) CONNECTIONS
PIN No
PATCH CORD
I / II 1 MAIN CN7507 — JACK CN7002 10 A
I / II 2 MAIN CN3011 — DISPLAY CN7001 18 B
I 3 TERMINAL CN703 — DIGITAL CN8601 6 C
I 4 MAIN CN7508 — REGULATOR CN5322 11 —
I 5 MAIN CN7509 — REGULATOR CN5321 15 —
I 6 MAIN CN2601 — DIGITAL CN8801 8 D
I / II 7 MAIN CN3014 — DIGITAL CN8002 6 E
II 8 DIGITAL CN8001 — HARD DISK DRIVE 40 —
II 9 REGULATOR CN5326 — HARD DISK DRIVE 4 —
II 10 REGULATOR CN5323 — DIGITAL CN8901 9 —
Table 1-8-4 Connection of Connectors
1-8
1.9 MECHANISM SERVICE MODE
This model has a unique function to enter the mechanism
into every operation mode without loading of any cassette
tape. This function is called the “MECHANISM SERVICE
MODE”.
1.9.1 How to set the "MECHANISM SERVICE MODE"
(1) Disconnect VCR from AC.
(2) Connect TPGND and TP7001 (TEST) on the Display
board assembly with a jump wire.
(3) Connect VCR to AC.
(4) Press the POWER button.
(5) With lock levers A B on the left and right of the Cassette
holder assembly pulled toward the front, slide the holder
in the same direction as the cassette insertion direction.
(For the positions of lock levers A B , refer to the “Pro-
cedures for Lowering the Cassette holder assembly” on
page 1-5 of 1.6 HOW TO REMOVE THE MAJOR PARTS
<VHS section>
(6) The cassette holder lowers and, when the loading has
completed, the mechanism enters the desired mode.
Swithing regulator
board assembly
Hard disk drive
(HDD)
Fan motor
Regulator
board assembly
Main board assembly
TPGND
Terminal board assembly
S-Sub
board assembly
VR701
DV AG C
TP701
On screen
D AGC
board assembly
TP106
PB FM
VHS mechanism
CN3011 CN7507
3D Digital
/2M board
assembly
VR401
D/A
LEVEL ADJ
Demodulator
board
assembly
TP2253
A.PB FM
TP4001
CTL.P
TP111
D.FF
TP7001
TEST
TPGND
PATCH CORD
PTU94022-18
QUQ112-1840CG
LED SW
board assembly
LED board assembly
<Front panel assembly>
Display board assembly
Fig. 1-9-1
Supporting
tape side
PATCH CORD
PTU94022-16
QUQ112-1640CG
Jack board assembly
Eject SW board assembly
1-9
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