JVC HMDH5US - Service Manual Immediate Download

SERVICE MANUAL

No.YD032

2004/11

D-VHS DIGITAL RECORDER

YD032

2004

HM-DH5US,HM-DT100US

For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).

TABLE OF CONTENTS

PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

MTP

NTSC

START

STOP

DATE

PLAY

REW

REC

STOP

PAUSE

TV/VCR CH

C. RESET

CANCEL

DBS

DAILY

EPG

SUB CH +

DTV MENU SUB CH -

DIGITAL CH

WEEKLY

ENTER

REC

LINK

REC

SPEED

SKIP

SUBTITLE

VCR

PROGRAM

PROG.CHECK

TIMER

A/B/C/D

TV/VCR

CABLE

/DBS

POWER

REMOTE

CODE

. , ?

ABC

DEF

GHI

JKL

MNO

PQRS

TUV

WXYZ

AUX

VOL

A.MO

NITO

DISPLAY

OSD

ENTER

BACK

CLEA

NAVI

Integrated

HD TV

HM-DH5US,HM-DT100US [D4D4, D4D7]

1-2 (No.YD032)

SPECIFICATION

· Specifications shown are for SP mode unless otherwise specified.

· E.& O.E. Design and specifications subject to change without notice.

· Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories.Confidential unpublished

·VCR Plus+, C3 and PlusCode are registered trademarks of Gemstar Development Corporation.The VCR Plus+ system is manufactured under license from

Gemstar Development Corporation. US Patent Numbers 5,307,173; 5,335,079; 4,908,713; 4,751,578; and 4,706,121.

·DSSTM is an official trademark of DIRECTV, Inc., a unit of GM Hughes Electronics. DISH NetworkTM is a trademark of Echostar Communications Corpo-

ration.

· "DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems, Inc.

· HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.

(i.Link) refers to the IEEE1394-1995 industry specification and extensions thereof. The logo is used for products compliant with the i.Link standard.

HM-DH5US

HM-DT100US

GENERAL

Power requirement

AC 120 V, 60 Hz

Power consumption

Power on

45 W

60 W

Power off

14 W

Temperature

Operating

°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 (W

× H × D)

435 mm

× 96 mm × 376 mm

(17-3/16"

× 3-4/5" × 14-4/5")

435 mm

× 96 mm × 383 mm

(17-3/16"

× 3-4/5" × 15-1/8")

Weight

5.1 kg (11.2 lbs)

5.8 kg (12.8 lbs)

Maximum recording time

D-VHS (HS)

210 min. with DF-420 video cassette

D-VHS (STD)

420 min. with DF-420 video cassette

D-VHS (LS3)

1260 min. with DF-420 video cassette

S-VHS/VHS (SP)

210 min. with ST-210 video cassette

S-VHS/VHS (EP)

630 min. with ST-210 video cassette

VIDEO/AUDIO (D-VHS)

Video format

MPEG2 standard

Audio format

Encode MPEG1 Layer2, Decode MPEG1 Layer2/Dolby Digital, LINEAR PCM (HS/STD)

Track composition

Tape speed

33.4 mm/sec (HS mode), 16.67 mm/sec (STD mode), 5.55 mm/sec (LS3 mode)

Head azimuth

±30 deg

Drum rotation

1800 rpm

Tracking system

CTL track system

Recording specification

Main data input rate

28.2 Mbps (HS mode), 14.1 Mbps (STD mode), 4.7 Mbps (LS3 mode)

Interface

IEEE1394 compliant DTCP digital copy protection compatible

VIDEO/AUDIO (S-VHS/VHS)

Format

S-VHS/VHS NTSC standard

Signal system

NTSC-type color signal and EIA monochrome signal, 525 lines/60 fields

Recording/Playback system

DA4 (Double Azimuth) head helical scan system

Signal-to-noise ratio

45 dB

Frequency range

70 Hz to 10,000 Hz (Normal audio), 20 Hz to 20,000 Hz (Hi-Fi audio)

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/24 programs

Memory backup time

Approx. 10 min.

CONNECTORS

Input/Output

Antenna

, F-type

S-video input

Y : 0.8 - 1.2 Vp-p, 75

, C : 0.2 - 0.4 Vp-p, 75

S-video output

Y : 1.0 Vp-p, 75

, C : 0.29 Vp-p, 75

Video input

0.5 - 2.0 Vp-p, 75

(pin jack)

Video output

1.0 Vp-p, 75

(pin jack)

Audio input

-8 dB, 50 k

(pin jack) Corresponding to mono (left)

Audio output

-8 dB, 1 k

(pin jack)

i.Link

4-pin (S400) for MPEG2 input/output, DV input

Component video output

Y : 1.0 Vp-p, 75

, CB/CR, PB/PR 0.7 Vp-p, 75

HDMI output

19-pin Corresponding to HDCP

JLIP

Ø3.5 mm

AV Compulink

Ø3.5 mm

CABLE BOX

Ø3.5 mm

Digital audio output

Optical

-18 dBm, 660 nm Corresponding to Dolby Digital and DTS Digital Surround Bit stream.

Selectable in digital audio output setting menu.

ACCESSORIES

Provided accessories Infrared remote control unit, AA battery x 2, Audio cable, RF cable (F-type), S-video cable (4-pin), Controller

(No.YD032)1-3

SECTION 1

PRECAUTION

1.1

SAFTY PRECAUTIONS

Prior to shipment from the factory, JVC products are strictly in-

spected to conform with the recognized product safety and elec-

trical 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 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

comply with X-ray emission standards for products

using cathode ray tubes and those specified for

compliance with various regulations regarding spu-

rious radiation emission.

(3) Fuse replacement caution notice.

Caution for continued protection against fire hazard.

Replace only with same type and rated fuse(s) as speci-

fied.

(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 components (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of

wires securely about the terminals before soldering.

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.

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 volt-

age circuits, and related circuits are specified for compli-

ance 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 cir-

cuits.Unauthorized modification can increase the high volt-

age 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 be-

tween the power cord and power trans former primary lead

wires are performed using crimp type connectors, if replac-

ing the connectors is unavoidable, in order to prevent safe-

ty 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 re-

use a connector (discard it).

Fig.1-1-3

b) 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.

Fig.1-1-4

c) Align the lengths of the wires to be connected. In-

sert the wires fully into the connector.

Fig.1-1-5

d) As shown in Fig.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.

Fig.1-1-6

e) Check the four points noted in Fig.1-1-7.

Fig.1-1-7

Power cord

cut close to connector

15 mm

Connector

Metal sleeve

1.2

2.0

5.5

Crimping tool

Not easily pulled free

Crimped at approx. center

of metal sleeve

Conductors extended

Wire insulation recessed

more than 4 mm

1-4 (No.YD032)

1.1.2 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 be-

tween power cord plug prongs and externally exposed

parts of the set (RF terminals, antenna terminals, video and

audio input and output terminals, microphone jacks, ear-

phone 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 spec-

ified clearance distance (d), (d') between soldered termi-

nals, and between terminals and surrounding metallic

parts. See Fig.1-1-11 below.

Fig.1-1-8

(4) Leakage current test

Confirm specified or lower leakage current between earth

ground/power cord plug prongs and externally exposed ac-

cessible parts (RF terminals, antenna terminals, video and

audio input and output terminals, microphone jacks, ear-

phone jacks, etc.).

Measuring Method : (Power ON)Insert load Z between

earth ground/power cord plug prongs and externally ex-

posed accessible parts. Use an AC voltmeter to measure

across both terminals of load Z. See Fig.1-1-9 and follow-

ing Fig.1-1-12.

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.

Fig.1-1-10

Fig.1-1-11

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.

Chassis

Power cord

primary wire

Externally

exposed

accessible part

Exposed accessible part

Grounding Specifications

AC inlet

Region

USA & Canada

Europe & Australia

Grounding Impedance (Z)

0.1 ohm

0.5 ohm

Earth pin

MIlli ohm meter

AC Line Voltage

Region

Japan

Europe & Australia

R 1 M /500 V DC

USA & Canada

1 M

R 12 M /500 V DC

R 10 M /500 V DC

Insulation Resistance (R)

Dielectric Strength

Clearance Distance (d), (d')

100 V

100 to 240 V

110 to 130 V

200 to 240 V

AC 1 kV 1 minute

AC 1.5 kV 1 minute

AC 1 kV 1 minute

(Class )

AC 3 kV 1 minute

AC 1.5 kV 1 minute

d, d'

3 mm

d, d'

4 mm

d, d'

3.2 mm

8 m m (Power cord)

6 m m (Primary wire)

4 m m

AC Line Voltage

Region

Japan

Europe & Australia

USA & Canada

Load Z

Leakage Current (i)

a, b, c

100 V

110 to 130 V

220 to 240 V

1 mA rms

0.5 mA rms

0.7 mA peak

2 mA dc

0.7 mA peak

2 mA dc

Exposed accessible parts

Antenna earth terminals

Other terminals

1.5

0.15

(No.YD032)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 Service position

This unit has been designed so that the Mechanism and Main

board assemblies can be removed together from the bottom

chassis. Before diagnosing or servicing the circuit boards, take

out the major parts from the bottom chassis.

2.1.1 How to set the "Service position"

(1) Refer to the disassembly procedure and perform the disas-

sembly of the major parts before removing the Mechanism

assembly.

(2) Remove the screws that fix the Mechanism, Main board as-

sembly to the bottom chassis. If any other screws are used

to fix the boards, remove them also.

(3) Remove the combined Mechanism, switching regulator,

digital, junction and Main board assemblies.

(4) If any other major parts are used, remove them also.

(5) Connect the wires and connectors of the major parts that

have been removed in steps (1) to (4). (Refer to Fig. 2-1a,

2-1b.)

(6) Place the combined Mechanism, Main board and other

board assemblies upside down.

(7) Insert the power cord plug into the power outlet and then

proceed with the diagnostics and servicing of the board as-

sembly.

Notes:

· Before inserting the power cord plug into the power out-

let, make sure that none of the electrical parts are able

to short-circuit between the workbench and the board

assembly.

· For the disassembly procedure of the major parts and

details of the precautions to be taken, see "Removing

the major parts".

· If there are wire connections from the Main board and

Mechanism assemblies to the other major parts, be sure

to remove them (including wires connected to the major

parts) first before performing step (2).

· When carrying out diagnosis and repair of the Main

board assembly in the "Service position", be sure to

ground both the Main board and Mechanism assem-

blies. If they are improperly grounded, there may be

noise on the playback picture or FDP counter display

may move even when the mechanism is kept in an inop-

erative status.

· In order to diagnose the playback or recording of the

cassette tape, set the Mechanism assembly to the re-

quired mode before placing it upside down. If the mech-

anism mode is changed (including ejection) while it is in

an upside down position the tape inside may be dam-

aged.

· For some models, the mechanism and board assem-

blies are attached by connectors only. When carrying

out a diagnosis or repair of the boards in the "Service

position", make sure that the connectors are not dis-

connected.

Fig.2-1a

CP3002

CN3901

CN601

CN602

CN7101

CN3104

CN3002

CP4002

CN7111

CN3003

CN8003

CN402

CN401

CN9301

CN9003

SWICTH / DISPLAY

board assembly

MAIN board assembly

DIGITAL board assembly

VR2251

FMA

REC

LEVEL

TP501

Y TO SE

PRE/REC

board assembly

OPERATION / JACK

board assembly

CN7001

FW7001

CN7202

CN7201

DIGITAL TUNER

UNIT

TP611

REC_LEVEL1

TP621

PB_DATA1

TP602

A/HS2_FF

TP622

PB_DATA2

TP612

REC_LEVEL2

TP4001 CTL.P

TP2253 A.PB FM

TP111 D.FF

TP106 PB FM

TP2254 A.REC FM