SERVICE MANUAL
DIGITAL HD PLAYER
YF02120042
CU-VH1US
CU-VH1US [M4R8]
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.YF021
2004/2
SPECIFICATION
1-2 (No.YF021)
SECTION 1
r
e
PRECAUTION
1.1 SAFTY 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.
1.1.1 Precautions during Servicing
(1) Locations requiring special cauti on 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
comply 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:
• Wires covered with PVC tubing
• Double insulated wires
• High voltage leads
(5) Use specified insulating materials for hazardous live parts.
Note especially:
• Insulation Tape
• PVC tubing
•Spacers
• Insulation sheets for transistors
•Barrier
(6) When replacing AC primary side compon ents (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
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.
(12) Crimp type wire connectorIn such cases as when replacing
the power transformer in sets where the connections
between the power cord and power trans former 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.
• Connector part number :E03830-001
• Required tool : Connector crimping tool of the proper
type which will not damage insulated parts.
• Replacement procedure
a) 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.1-1-3
b) Strip about 15 mm of the insulati on from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
15 mm
Fig.1-1-4
c) Align the lengths of the wires to be connected.
Insert the wires fully into the connector.
Metal sleeve
Fig.1-1-1
(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.1-1-2
(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
Connector
Fig.1-1-5
d) As sh ow n in Fi g. 1-1-6, 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
Crimping tool
Fig.1-1-6
e) Check the four points noted in Fig.1-1-7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Crimped at approx. cente
of metal sleev
Conductors extended
Fig.1-1-7
(No.YF021)1-3
1.1.2 Safety Check after Servicing
Examine the area surrounding the repaired location for d amage
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 Fig.1-1-11 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 Fig.1-1-11 below.
d
Chassis
d'
Power cord
primary wire
Fig.1-1-8
(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 Fig.1-1-9
and following Fig.1-1-12.
ab
Externally
exposed
accessible part
Z
V
c
A
Fig.1-1-9
(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 Fig.1-1-10 and grounding
specifications.
AC inlet
Earth pin
Exposed accessible part
MIlli ohm meter
Grounding Specifications
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z
Z 0.1 ohm
Z 0.5 ohm
)
Fig.1-1-10
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Region
Japan
USA & Canada
Europe & Australia
Insulation Resistance (R
R 1 M /500 V DC
1 M R 12 M /500 V DC
R 10 M /500 V DC
)
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 minute
AC 1 kV 1 minute
AC 3 kV 1 minute
AC 1.5 kV 1 minute
(
Class
(
Class
Clearance Distance (d), (d'
d, d' 3 mm
d, d' 4 mm
d, d' 3.2 mm
d 4 mm
)
d' 8 mm (Power cord
d' 6 mm (Primary wire
)
Fig.1-1-11
AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Region
Japan
USA & Canada
Europe & Australia
Load Z
1
0.15
1.5
2
50
Leakage Current (i)
i 1 mA rms
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
a, b, c
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
Fig.1-1-12
NOTE :
These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
)
)
)
1-4 (No.YF021)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.YF021)1-5
SECTION 3
DISASSEMBLY
3.1 BEFORE ASSEMBLY AND DISASSEMBLY
3.1.1 Precautions
• Be sure to disconnect the power supply unit prior to mounting
and soldering of parts.
• Prior to removing a component part that needs to disconnect
its connector(s) and its screw(s), first disconnect the wire(s)
from the connector(s), and then remove the screw(s).
• When connecting/disconnecting wires, pay enough attention
not to damage the connectors.
• When inserting the flat wire to the connector, pay attention to
the direction of the flat wire.
• Be careful in removing the parts to which some spacer or
shield is attached for reinforcement or insulation.
• When replacing chip parts (especially IC parts), first remove
the solder completely to prevent peeling of the pattern.
• Tighten screws properly during the procedures. Unless
specified otherwise, tighten screws at a torque of 0.098N
·cm). However, 0.098N·m (1.0kgf·cm) is a value at the
(1.0kgf
time of production. At the time of service, perform the
procedure at a torque 10% less than 0.098N
·m (1.0kgf·cm).
(See "SERVICE NOTE" as for tightening torque.)
3.1.2 Destination of connectors
Two kinds of double-arrows in connection tables respectively
show kinds of connector/wires.
: Wire: Flat wire : Board to board (B-B)
: The connector of the side to remove
CONN. No. PIN No.CONNECTOR
CN2a
CN2b
MAIN CN101
MAIN CN103
MONI/ BW CN761
MIC CN762
3.1.3 Disconnection of connectors (Wires)
Wire
· Pull both ends of the connector in the arrow
direction, remove the lock and disconnect the flat
wire.
B-B Connector
B-B Connector
· Pull the both ends of the board in the direction of the arrow, and remove the B-B Connector.
FPC Connector
· Extend the locks in the direction of the arrow for
unlocking and then pull out the wire. After
removing the wire, immediately restore the locks
to their original positions because the locks are
apt to come off the connector.
Wire
FPC Connector
Lock
B-B Connector
Fig.3-1-1
3.1.4 Tools required for disassembly and assembly
Torque driver
YTU94088
Bit
YTU94088-003
Tweezers
P-895
·m
40
2
• Torque driver
Be sure to use to fastening the mechanism and exterior parts
because those parts must strictly be controlled for tightening
torque.
• Bit
This bit is slightly longer than those set in conventional torque
drivers.
• Tweezers
To be used for removing and installing parts and wires.
• Chip IC replacement jig
To be used for replacement of IC.
• Cleaning cloth
Recommended cleaning cloth to wipe down the video heads,
mechanism (tape transport system), optical lens surface.
3.2 ASSEMBLY AND DISASSEMBLY OF MAIN PARTS
3.2.1 Assembly and disassembly
When reassembling, perform the step(s) in reverse order.
STEP
No.
[1]
[2]
[8]
PART
TOP COVER ASSY
UPPER ASSY
(Inc. VF ASSY,
SPEAKER/MONITOR)
VF ASSY
(∗1) Order of steps in Procedure
When reassembling, preform th e step(s) in the reverseorder.
These numbers are also used as the identification (location)
No. of parts Figures.
(∗2) Part 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.
S = Screw
L = Lock, Release, Hook
SD = Solder
CN = Connector
[Example]
• 4 (S1a) = Remove 4 S1a screws.
• 3 (L1a) = Disengage 3 L1a hooks.
• 2 (SD1a) = Unsolder 2 SD1a points.
• CN1a = Remove a CN1a connector.
(∗5) Adjustment information for installation.
Fig.
No.
Fig.C1
Fig.C2-1
Fig.C2-2
POINT
S1,2(L1)
S2a,2(S2b),3(S2c)
2(S2d),S2e,S2c
L2,CN2a,b
2(S8),L8,CN8a
( 4) ( 5)( 2) ( 3)( 1)
NOTE
-
-
NOTE 8a
NOTE 8b
Chip IC replacement jig
PTS40844-2
1-6 (No.YF021)
Cleaning cloth
KSMM-01
Fig.3-1-2
3.2.2 Disassembly/Assembly of CABINET PARTS and
ELECTRICAL PARTS (1)
NOTE :
• During the procedure, see "3.2.4 Wiring" as for wiring connection/attachment of main parts.
zDisassembly procedure
STEP
PART NAME
No.
[1]
BOTTOM CASE ASSY
[2]
BATTERY BOARD ASSY
(INCLUDE BATT.CASE UNIT)
[3]
COVER(BOTTOM)
/
[4]
JACK BOARD ASSY
[5]
FRAME ASSY
(INCLUDE ANALOG BOARD
ASSY/DIGITAL BOARD
ASSY/FRONT BOARD ASSY
([4])
/DC-JUNC BOARD ASSY)
[6]
JIG-CONN BOARD ASSY
/
[7]
JIG-JUNC BOARD ASSY
[8]
DIGITAL BOARD ASSY
[9]
USB COVER ASSY
[10]
FRONT BOARD ASSY
[11]
ANALOG BOARD ASSY
[12]
DC-JUNC BOARD ASSY
Fig.
No.
Fig.FA1
COVER(MIC),4(S1a),2(S1b),(S1c),
(S1a),4(S1c)
Fig.FA2
SHIEET,2(S2),CN2a,CN2b
Fig.FA3
3(S3),2(L3)
CN4a,CN4b,CN4c,4(S4a),(S4b),CN4d
Fig.FA4a
CN5a,CN5b,CN5c,CN5d,CN5e,CN5f
CN5g,CN5h,CN5k,SPACER,4(S5),
CN5m,CN5n,CN5p
/Fig.FA4b
CN5q
CN6,3(S6),2(L6)
Fig.FA5
S7,CN7
SHIELD(HEAT SINK),5(S8a),L8a
Fig.FA6a
/Fig.FA6b
HEAT SINK
CN8d,L8b
COVER(USB),3(S9),2(L9)
Fig.FA7
SPACER,5(S10),CN10a,CN10b,CN10c
3(S11),CN11
Fig.FA8
2(S12),2(L12)
Fig.FA9
POINT NOTE
,CN8a,CN8b,4(S8b),CN8c
NOTE1
NOTE2
NOTE4
NOTE5
NOTE9
NOTE10
NOTE11a
NOTE11b
NOTE11c
Fig.3-2-1
NOTE1:
Remove the COVER(MIC) first.
NOTE2:
Remove the SHEET if necessary.
NOTE4:
Remove the JACK BOARD ASSEMBLY without removing
the DV cable.
NOTE5:
Before removing the FPC, remove the SPACER that attaches the FPC.
NOTE9:
In attaching the USB COVER ASSEMBLY, be careful about
the position of the SWITCH.
NOTE10:
Before removing the FRONT BOARD ASSEMBLY, remove
the SPACER that fixes FPC and wires.
NOTE11a:
Before removing the ANALOG BOARD ASSEMBLY, remove the FPC that fixes the ANALOG BOARD ASSEMBLY
so that the FPC moves easily.
NOTE11b:
Be careful in handling the CAPACITOR.
NOTE11c:
In removing the ANALOG BOARD ASSEMBLY, be careful
not to cut or damage wires.
zDestination of connectors
CN.NO.
CONNECTOR
PIN
NO.
CN2a BATT CN808 DC-JUNC - 3
CN2b BATT CN807 JACK CN806 6
CN4a JACK CN805 FRONT CN609 10
CN4b JACK CN803 FRONT CN608 6
CN4c JACK CN810 FRONT CN611 8
CN4d JACK CN804 ANALOG CN205 10
CN5a FRONT CN610 EJECT CN801 6
CN5b PREMDA CN415 ANALOG CN213 14
CN5c PREMDA CN410 DIGITAL CN107 22
CN5d PREMDA CN411 DIGITAL CN106 6
CN5e PREMDA CN412 ANALOG CN210 5
CN5f PREMDA CN413 ANALOG CN212 15
-
CN5g PREMDA CN414 ANALOG CN211 20
CN5h PREMDA CN409 MONI/OPE CN307 6
CN5k PREMDA CN401 MONI/OPE CN308 11
-
CN5m MONI/OPE CN303 DIGITAL CN104 18
CN5n MONI/OPE CN301 ANALOG CN209 51
CN5p MONI/OPE CN306 FRONT CN607 11
CN5q DIGITAL CN111 i.LINK - 6
CN6 JIG-CONN CN903 JIG-JUNC CN902 26
CN7 DIGITAL CN110 JIG-JUNC CN901 30
CN8a FRONT CN602 DIGITAL CN109 16
-
CN8b DIGITAL CN105 FRONT CN604 14
CN8c DIGITAL CN108 ANALOG CN208 6
CN8d DIGITAL CN101 ANALOG CN201 150
CN10a FRONT CN603 ANALOG CN215 8
CN10b ANALOG CN207 FRONT CN606 6
CN10c FRONT CN605 ANALOG CN206 10
CN11 ANALOG CN214 DC-JUNC - 6
Fig.3-2-2
(No.YF021)1-7
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