SERVICE MANUAL
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YD026
2004/10
DVD&HDD VIDEO RECORDER
YD026
2004
10
DR-MH20SUC, DR-MH20SUJ,
DR-MH30SUS, DR-MH30SUC
DR-MH30SUJ, DR-MH30STW
TABLE OF CONTENTS
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Since the whole mechanism assembly unit is replaced, the DVD recorder
mechanism of this unit need not be adjusted.
DR-MH20SUC, DR-MH20SUJ [D4HR20]
DR-MH30SUS, DR-MH30SUC, DR-MH30SUJ, DR-MH30STW [D4HR25]
HDD
DVD
CABLE/DBS
DVD
TV
DVD
CH
NEXT
PREVIOUS
PAUSE
REC
REC MODE
DISPLAY
ON SCREEN
SLOW
SLOW
PLAY/SELECT
STOP/ CLEAR
NAVIGATION
TOP MENU
RETURN
ENTER
MENU
TV/CBL/DBS
STANDBY ON
OPEN/
CLOSE
TV/
VIDEO
TV VOLUME
AUX
CANCEL
MEMO/MARK
PROGRAMME
EDIT
DUBBING
LIVE
JUMP
HELP
TV MUTING
SAT
SET UP
VPS/PDC
AUDIO
SUBTITLE
ANGLE
LIVE CHECK
PROGRESSIVE
SCAN
STANDBY/ON
S-VIDEO
VIDEO
L(MONO)-AUDIO-R
DV
DV IN
F1
HDD
DVD
PULL - OPEN
Only ver.US,UC,UJ
Only ver.TW
Area Suffix
US ----------------------- U.S.A.
UC -------------------- Canada
UJ ------------ U.S.A. Militaly
TW -------------------- Taiwan
1-2 (No.YD026)
SPECIFICATION
E.& O.E. Design and specifications subject to change without notice.
· Manufactured under licence from Dolby Laboratories. "Dolby" and double-D symbol are trademarks of Dolby Laboratories.
· "DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems, Inc.
· VCR Plus+, C3 and PlusCode are registered trademarks of Gemstar Development Corporation. The VCR Plus+ system is manufactured under li-
cense from Gemstar Development Corporation.
·DSSTM is an official trademark of DIRECTV, Inc., a unit of GM Hughes Electronics. DISH NetworkTM is a trademark of Echostar Communications
Corporation.
· This product incorporates copyright protection technology that is protected by method claims of certain U.S. patents and other intellectual property
rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by Macrovision
Corporation, and is intended for home and other limited viewing users only unless otherwise authorized by Macrovision Corporation. Reverse engi-
neering or disassembly is prohibited.
DR-MH20SUC,DR-MH30SUC,DR-MH30SUS
DR-MH30STW
DR-MH20SUJ,DR-MH30SUJ
GENERAL
Power requirement AC 120 V~, 60 Hz
AC 110 V - 240 V~, 50 Hz/60 Hz
Power consumption Power on : 35 W
Power off : 16.2 W
Power on : 37 W
Power off : 19.3 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 (W
× H × D) 435 mm × 70 mm × 345.5 mm (17-3/16" x 2-13/16" x 13-5/8")
Weight 6.1 kg(13.5 lbs)
Input/Output
S-video input Y:0.8-1.2 Vp-p, 75 ohms
C : 0.2 -0.4 Vp-p, 75 ohms
S-video output Y : 1.0 Vp-p, 75 ohms
C : 0.3 Vp-p, 75 ohms
Video input 0.5- 2.0 Vp-p, 75 ohms (pin jack)
Audio input -8 dB, 50 kilohms (pin jack)
Corresponding to mono (left)
Audio output -8 dB, 1 kilohms (pin jack)
i.Link 4-pin for DV input
Component video output Y : 1.0 Vp-p, 75 ohms
CB/CR, PB/PR: 0.7 Vp-p, 75 ohms
Corresponding to copy protection
Digital audio output Optical: -18 dBm, 660 nm
Coaxial: 0.7 Vp-p, 75 ohms
Corresponding to Dolby Digital and DTS Digital Surround Bit stream
Selectable in digital audio output setting menu
RCA connectors IN x 3, OUT x 2
VIDEO/AUDIO (DVD Deck)
Recording time Maximum 8 hours (with 4.7 GB disc)
(XP) : Approx. 1 hour, (SP) : Approx. 2 hours, (LP) : Approx. 4 hours, (EP) : Approx. 6 hours, (FR) : Approx. 1 hour - 8 hours
Audio recording system Dolby Digital (2 ch)
Linear PCM (XP mode only)
Video recording compression system MPEG2 (CBR/VBR)
VIDEO/AUDIO (HDD Deck)
Video recording compression system MPEG2 (VBR)
Audio recording system Dolby Digital (2 ch)
Linear PCM (XP mode only)
Recording time HDD capacity
DR-MH30S:160 GB,DR-MH20S:80 GB
Recording Time
DR-MH30S
(XP) 1 hour: Approx. 34 hours, (SP) 2 hours: Approx. 68 hours, (LP)4 hours : Approx. 136 hours, (EP)6 hours : Approx. 204
hours, (FR480)8 hours : Approx. 272 hours
DR-MH20S
(XP) 1 hour: Approx. 17 hours, (SP) 2 hours: Approx. 34 hours, (LP)4 hours : Approx. 68 hours, (EP)6 hours : Approx. 102 hours,
(FR480)8 hours : Approx. 136 hours
TUNER/TIMER
Channel coverage VHF: Channels 2 - 13
UHF: Channels 14 - 69
CATV: 113 Channels
Memory backup time Approx. 60 seconds
ACCESSORIES
Provided accessories RF cable, Audio/Video cable, Satellite Controller, Infrared remote control unit,
"AA" battery x 2
RF cable, Audio/Video cable, Conver-
sion plug, Satellite Controller, Infrared
remote control unit, "AA" battery x 2
(No.YD026)1-3
SECTION 1
PRECAUTION
1.1
Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by (
) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
· Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent must not exceed 0.5mA AC (r.m.s.).
· Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000
per volt or more sensitivity
in the following manner. Connect a 1,500
10W resistor
paralleled by a 0.15
µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2
Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3
Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4
Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor (
), diode (
)
and ICP (
) or identified by the "
" mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500
10W
0.15 F AC TYPE
1-4 (No.YD026)
1.5
Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1
Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players or recorder.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
· In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
· Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.6
Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long
a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
(No.YD026)1-5
1.7
Important for laser products
D5105
R5103
R5109
D5310
B5001
D5101
IC5301
C5302
R5105
D5203
F5001
D5106
B5301
D5001
D5103
W5302
D5104
D5205
C5203
D5201
D5202
W5301
D5204
D5207
IC5101
R5001
D5206
D5208
CN5301
D5209
D5210
D5211
R5108
CN5303
CN5306
D5212
CN5305
D5214
IC5302
D5213
R5101
C5207
L5201
L5202
L5203
L5204
VA5003
L5205
L5206
L5207
C5201
D5308
C5210
C5202
C5204
C5205
C5206
C5208
C5209
R5320
C5005
C5307
R5319
Q5316
C5303
C5304
Q5310
C5310
C5305
C5001
C5002
C5003
C5004
C5101
C5103
C5104
C5105
Q5304
C5309
C5308
C5311
C5312
C5313
C5301
C5326
C5306
C5318
C5316
D5315
D5309
D5301
D5302
D5303
D5304
T5001
Q5306
PC5101
CP5301
VA5001
CN5001
Q5307
LF5001
Q5301
FC5001
FC5002
D5317
Q5309
C5102
R5307
R5308
R5309
W5305
W5303
W5409
W5402
W5414
C5340
R5317
W5416
W5306
W5419
W5309
D5306
D5307
B5401
W5413
W5405
W5404
GN1
W5410
W5401
W5406
W5411
W5408
W5421
W5407
W5420
ST1
CN5304
W5403
W5415
W5418
W5423
W5412
W5425
R5328
R5329
W5422
D5316
W5307
W5308
W5304
CP5302
W5424
C5323
C5329
C5331
D5311
D5312
D5313
D5314
C5319
C5321
W5417
CN5307
B5402
Full Fuse Replacement Marking
Graphic symbol mark
(This symbol means fast blow type fuse.)
should be read as follows ;
FUSE CAUTION
FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE
AND RATING OF FUSES ;
F5001 : 1.6 A / 250 V
F5001 : 1.6 A / 250 V
Marquage Pour Le Remplacement
Complet De Fusible
PRECAUTIONS SUR LES FUSIBLES
POUR UNE PROTECTION CONTINUE CONTRE
DES RISQUES D'INCENDIE, REMPLACER
SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;
Le symbole graphique (Ce symbole signifie
fusible de type a fusion rapide.)
doit etre interprete comme suit ;
Importance administering point on the safety