Jvc RX-DP20-VBK Service Manual
SERVICE MANUAL
AUDIO/VIDEO CONTROL RECEIVER
RX-DP20VBK
TR NSMTEA N
SAND Y
ON
ZO E 2
ONE 1
Z NE 1
T BS
N/ F O /O F
ST NDB / N ST NDB / N
ZONE 2 L ARNZO E 1
DVD
D MU
CD
HO O
C R
PEM
CR 1 CR 2
XT 7 C
FMAMIDOVDB
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NPU
123
LV NESS
SOUND
456
EST
/
89
7
STANDBY
STANDBY/ON
MASTER VOLUME
CC CONVERTER
ZONE 1
ON/OFF
ZONE 2
ON/OFF
PHONES
RX DP20V
AUDO/V DEO CONTROL RECE VER
D MMER
DOOR
UP
DOOR
DOWN
VIDEO LÑAUDIOÑR
S-VDEODG TAL
VIDEO
CC CO VER ER
RE URN
THX
XES 71
SLEEP DIMMER
REW
DOWN UP
REC
CHANNEL
TV VOL
TU
M N
T XT
I P A
DVD
ME U
RMSR DP20J
AV CONTROL RECE VER
10 100
PLAY
TUNNG
STOP PAU E
TVVIDEO
MUTNG
SET
M MODE
DSP URRDSPS RROUND
AN LOG DI ECT
RE OTE CO TROL
+
0
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TV
CAV
BS
FF
VOLUME
A JU
ENU
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Area Suffix
J --------------- U.S.A.
C ------------- Canada
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.22008
2003/7
SPECIFICATION
Amplifier Output Power At Stereo operation
(Analog Direct On)
At Surround operation
(Analog Direct On)
Audio Audio Input
Sensitivity
/Impedance
(1 kHz)
Video Video Input
Sensitivity
/Impedance
Video Output
Level
PHONO IN (MC) 0.25 mV/100 Ω
(MM) 2.5 mV/47 kΩ
CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN 200 mV/47 kΩ
DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO 200 mV/47 k Ω
Audio Input
(DIGITAL IN)*
* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround
(with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)
Audio Output Level ZONE 2 PREOUT 200 mV
Recording Output
Level
Digital output Optical DIGITAL OUT
Signal wave length 660 nm
Output level
Signal-to-Noise Ratio
(‘66 IHF/’78 IHF)
(Analog Direct On)
CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN 92 dB/80 dB
DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO 92 dB/80 dB
Frequency Response
(8 Ω)
CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN 10 Hz to 100 kHz (+1 dB, -3 dB)
DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO 10 Hz to 100 kHz (+1 dB, -3 dB)
RIAA Phono Equalization ±1.0 dB (20 Hz to 20 kHz)
Composite video
DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO
S-video
DVD IN, VCR 1 IN, VCR 2 IN, TV
SOUND/DBS IN, VIDEO
Component
1 IN (DVD), 2 IN,3 IN
Composite video
VCR 1 OUT,VCR 2 OUT,MONITOR OUT
S-video
VCR 1 OUT, VCR 2 OUT, MONITOR OUT
Component
MONITOR OUT
Synchronization Negative
Signal-to-Noise Ratio 45 dB
Front channels
120 W per channel, min. RMS, driven into 8 Ω, 20 Hz to 20 kHz with no more
than 0.02% total harmonic distortion. 120 W per channel, min. RMS, driven
into 4 Ω, 20 Hz to 20 kHz with no more than 0.07% total harmonic distortion.
Front channels
120 W per channel, min. RMS, driven into 8 Ω, 20 Hz to 20 kHz with no more
than 0.02% total harmonic distortion.
Center channel
120 W, min. RMS, driven into 8 Ω, 20 Hz to 20 kHz with no more than 0.02%
total harmonic distortion.
Surround channels
120 W per channel, min. RMS, driven into 8 Ω, 20 Hz to 20 kHz with no more
than 0.02% total harmonic distortion.
Surround back channels
120 W per channel, min. RMS, driven into 8 Ω, 20 Hz to 20 kHz with no more
than 0.02% total harmonic distortion.
Coaxial 1(DVD), 2(CD), 3(TV/DBS) 0.5 V(p-p)/75 Ω
Optical 4(CDR), 5(MD), 6(VCR1) -21 dBm to -15 dBm (660 nm ±30 nm)
PREOUT 1 V
TAPE/MD OUT, CDR OUT, VCR 1
OUT, VCR 2 OUT
PHONO IN (MC) 60 dB/72 dB (at REC OUT)
(MM) 72 dB/80 dB (at REC OUT)
PHONO IN (MC) 20 Hz to 20 kHz (±1 dB)
(MM) 20 Hz to 20 kHz (±1 dB)
(Y: luminance) 1 V(p-p)/75Ω
(C: chrominance, burst) 0.286 V(p-p)/75 Ω
(Y: luminance) 1 V(p-p)/75 Ω
(PB, PR) 0.7 V(p-p)/75 Ω
(Y: luminance) 1 V(p-p)/75Ω
(C: chrominance, burst) 0.286 V(p-p)/75 Ω
(Y: luminance) 1 V(p-p)/75 Ω
200 mV
1 V(p-p)/75 Ω
1 V(p-p)/75 Ω
(PB, PR): 0.7 V(p-p)/75 Ω
1-2 (No.22008)
FM tuner
(IHF)
AM tuner Tuning Range 530 kHz to 1 710 kHz
General Power Requirements AC 120V~, 60 Hz
Designs & specifications are subject to change without notice.
Tuning Range 87.5 MHz to 108.0 MHz
Usable Sensitivity Monaural 12.8 dBf (1.2 µV/75 Ω)
50 dB Quieting Sensitivity Monaural 18.2 dBf (2.2 µV/75 Ω)
Stereo 38.2 dBf (22.3 µV/75 Ω)
Signal-to-Noise Ratio (IHF-A weighted) Monaural 78 dB at 85 dBf
Stereo 73 dB at 85 dBf
Total Harmonic Distortion Monaural 0.2% at 1 kHz
Stereo 0.3% at 1 kHz
Stereo Separation at REC OUT 40 dB at 1 kHz
Alternate Channel Selectivity 60 dB (±400 kHz)
Frequency Response 30 Hz to 15 kHz (+0.5 dB, -3 dB)
Usable Sensitivity Loop antenna: 400 µV/m
Signal-to-Noise Ratio 50 dB (100 mV/m)
Power Consumption 580 W/690 VA (at operation)
2.7 watts (in standby mode)
Dimensions (W × H × D) 445 mm × 177 mm × 475 mm
(17 9/16 in. × 7 in. × 18 3/4 in.)
Mass 23.5 kg (52 lbs)
(No.22008)1-3
SECTION 1
Good earth ground
d
AC VOLTMETER
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purposes. 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 performed 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 characteristics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Service 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 characteristics 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 origin al lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassembling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna 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, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current 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, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
1-4 (No.22008)
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 0.5µ
mA AC (r.m.s.).
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
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 preforming 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)
each expose
metal part.
1.5 Importance administering point on the safety
WR42
WR48
PW26
PW21
PW24
EP21
TW51
C42
R41
R57
Q53
PW25
PW23
PW22
R21
R42
D45
C60
C43
FC41 FC42
C40
C41
D41
Q54
Q55
R51
R54
CN41
D25
RY21
C21
FC22 FC21
WR41
FC43 FC44
CN44 CN45
C56
D50
Q44
Q42
Q43
CN46
D51
C52
C25
D26
Q22
C24
R22
T42
R26
R27
T21
CN25
R28
D22
D21
C22
WR26
Q21
C27
D27
Q23
R24
R23
C26
R25
C23
D24
EP22
D23
CN47
R55
R50
Q41
C59
C51
R47
R46
R56
TH41
D48
C49
R4011
R4012
T41
FC401 FC402
R45
C44
C45
C57 C58
D4004
C47 C48
D4003
D4002
C46
D4001
C55
R49
C54
D49
R48
C53
R43
Q47
Q45
Q46
IC44
TW41
TW42
Caution: For continued protection against risk of
fire, replace only with same type 8A/250V for F21,
0.5A/250V for F41 and 2A/125V for F42 and F43.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F21 comme le meme type
que 8A/250V, et 0.5A/250V pour F41, et 2A/125V
pour F42 et F43.
Ce sont des fusibles suretes qui functionnes rapide.
^
(No.22008)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.22008)
SECTION 3
A
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cover
(See Fig.1)
(1) Remove the eight screws A attaching the top cover on both
sides of the body.
(2) Remove the three screws B on back of the body.
(3) Remove the top cover from behind in the direction of the ar-
row while pulling both sides outward.
3.1.2 Removing the front panel assembly
(See Fig.2 and 3)
• P rior to performing the following procedure, remove the top
cover.
(1) Cut off the tie band 1 fixing the harness.
(2) Remove the screw a, and remove the lug wire.
(3) Remove the three screws C attaching the front pane l as-
sembly.
(4) Remove the four screws D attaching the front panel as-
sembly on bottom of the body. Detach the front pa nel assembly toward the front.
(5) Disconnect the harness from the connector CN971
, CN983 and CN985 on the system control board
CN977
(see fig.5), CN973 on the front AV in board and CN373 on
the front DIGITAL board (see 2-3.Front panel assembly
section/ fig.2).
,
(both sides)
a
(fixing the
lug wire)
Audio signal
1 board
CN201
Tie band 3
Top cover
A(both sides)
Fig.1
Front panel assembly
C
B
C
Tie band 1
Harness
band
Y/C separator
board
CN482
CN481
V compo 2 board
D
Tie band 2
CN581
Audio 7.1ch
in board
CN301
Compu
link board
CN1
Tuner unit
CN1
RF remote unit
Fig.2
D
Front panel
assembly
Fig.3
(No.22008)1-7
3.1.3 Removing the V compo 2 board & RF remote unit & tuner unit & compu link board
(See Fig.2 and 4)
• Prior to performing the following procedure, remove the top
cover.
(1) Disconnect the harness from the con nector CN581 on the
V compo 2 board.
Remove the two screws E' attaching the V compo 2 board
to the rear panel.
(2) Disconnect the harness from the connector CN1
remote unit.
Remove the nut b attaching the RF remote unit to the rear
panel.
(3) Disconnect the card wire from the connector CN1
tuner unit.
Remove the two screws E'' attaching the tuner unit to the
rear panel.
(4) Disconnect the harness from the con nector CN301
compu link board.
Remove the four screws E''' attaching the compu link
board to the rear panel.
3.1.4 Removing the Y/C separator board
(See Fig.2)
• Prior to performing the following procedure, remove the top
cover.
(1) Cut off the tie band 2 fixing the harness.
(2) Draw out up the Y/C separator board, disconnecting the
connectors CN481
3.1.5 Removing the audio 7.1ch in board
(See Fig.2 and 4)
• Prior to performing the following procedure, remove the top
cover.
(1) Cut off the tie band 2 & 3 fixing the harness.
(2) Disconnect the harness from the con nector CN201
audio signal 1 board.
(3) Remove the two screws E'''' attaching the audio 7.1ch in
board to the rear panel.
3.1.6 Removing the rear panel
(See Fig.4)
• Prior to performing the following procedure, remove the top
cover.
(1) Unsolder the two solder parts on the AC inlet.
(2) Remove the forty four screws E & E' & E'' & E''' & E'''' and
the nut b attaching each board to the rear panel.
(3) Remove the thirteen screws F attaching the rear panel on
the back of the body and bottom.
and CN482 on the Y/C separator board.
on the RF
on the
on the
on the
a
(fixing the
lug wire)
Audio signal
1 board
CN201
Tie band 3
Y/C separator
board
CN482
CN481
V compo 2 board
Rear panel
E
Front panel assembly
C
Tie band 2
Solder part
E
E
E
FF
CN581
RF remote unit
Fig.2
AC inlet
E''''
E'
b
Fig.4
C
Audio 7.1ch
in board
CN1
Black
Red
E''
F
F
Tie band 1
Harness
band
Compu
link board
E'''
E
CN301
CN1
Tuner unit
E
F
F
1-8 (No.22008)
3.1.7 Removing the system control board
(See Fig.5 and 6)
• P rior to performing the following procedure, remove the top
cover and front panel assembly.
(1) Disconnect the card wires and harness from the connector
, CN964 and CN981 on the system control board.
CN963
(2) Cut off the tie bands fixing the harness.
(3) Disconnect the harness from the connector CN45
power supply 2 board and CN25
(4) Disconnect the connector CN324
board and CN234, CN208 on the audio signal 1 board.
(5) Remove the three plastic rivet.
on the power/ fuse board.
on the audio signal 2
on the
CN983
Plastic rivet
CN977
CN981
System control board
CN985
Plastic rivet
3.1.8 Removing the DSP board & shield cover
(See Fig.7)
• P rior to performing the following procedure, remove the top
cover, rear panel and front panel assembly.
(1) Disconnect the connector CN631
(2) Disconnect the connector CN203
board.
And cut off the tie bands fixing the harness.
(3) Removing the two plastic rivet, and disconnect the connec-
tor CN633
(4) Removing the screw G attaching the shield cover and re-
move the shield cover.
, CN643 and CN635 on the DSP board.
on the DSP board.
on the audio signal 1
CN234
CN224
CN208
CN203
CN324
Tie band
Top view
Shield cover
CN963
CN964
Fig.5
Audio signal 2 board
Audio signal 1 board
Fig.6
G
CN971
Shield cover
CN631
CN203
CN45
(on power
supply 2
)
board
Tie band
CN25
Power/ fuse
board
CN633
CN643
Plastic rivet
Fig.7
Audio signal
1 board
DSP board
CN635
(No.22008)1-9
3.1.9 Removing the audio signal 1 board
(See Fig.8)
• Prior to performing the following procedure, remove the top
cover, rear panel and DSP board.
(1) Disconnect the harness from the connector CN202,
, CN234, CN224, CN208, CN207, CN218 and
CN204
on the audio signal 1 board.
CN223
(2) Remove the plastic rivet.
(3) Disconnect the connector CN205
the audio signal 1 board.
, CN221 and CN206 on
Plastic rivet
CN204
CN202
CN234
CN224
CN208
CN207
CN218
CN223
3.1.10 Removing the audio signal 2 board & video board & S video board
(See Fig.9 to 11)
• Prior to performing the following procedure, remove the top
cover, rear panel, Y/C separator board, DSP board and audio
signal 1 board.
(1) Disconnect the harness from the con nector CN973
front AV in board (see 2-3.Front panel assembly section/
fig.2).
(2) Disconnect the harness from the con nector CN324
audio signal 2 board.
(3) Remove the audio signal 2 board from the connector CN15
and CN6 on the input base board.
(4) Remove the video board from the connector CN7 on the in-
put base board.
(5) Remove the S video board from the connector CN8
input base board.
3.1.11 Removing the V compo 1 board
(See Fig.9 to 11)
• Prior to performing the following procedure, remove the top
cover and rear panel.
(1) Remove the V compo 1 board from the connector CN9
the input base board.
on the
on the
on the
on
Audio signal 2 board
CN324
Connection between the Input base board and each board.
CN15/CN6
CN205
Video board
CN7
CN8
CN9
CN206
Audio signal 1 board
CN221
Fig.8
S video board
V compo 1 board
Input base board
Fig.9
Audio signal 2 board (CN325/CN321)
Video board (CN401)
S video board (CN451)
V compo 1 board (CN501)
Fig.10
Input base board
1-10 (No.22008)
CN15
CN6
CN7
CN8
CN9
Fig.11
3.1.12 Removing the input base board
(See Fig.12)
• P rior to performing the following procedure, remove the top
cover, rear panel, DSP board, audio signal 1 board, audio signal 2 board, video board, S video board and V compo 1 board.
(1) Disconnect the harness from the connector CN62
power supply 1 board and CN44
board.
And cut off the tie bands fixing the harness.
(2) Disconnect the harness from the connecto r CN743
speaker board.
(3) Disconnect the card wire from the connector CN1
and the harness from the connector CN11 on the input
base board.
(4) Remove the seven screws H attaching the input base
board.
3.1.13 Removing the speaker board
(See Fig.12)
• P rior to performing the following procedure, remove the top
cover and rear panel.
(1) Disconnect the harness from the connector CN741
and CN743 on the speaker board.
on the power supply 2
on the
on the
, CN2
, CN742
H
CN1
CN2
CN11
H
Input base board
CN743
Power supply
1 board
CN741
CN62
CN44
(on the power
supply 2 board)
CN742
3.1.14 Removing the power supply 1 board
(See Fig.13)
• P rior to performing the following procedure, remove the top
cover.
(1) Disconnect the harness from the connector CN61
CN63, CN64 and CN65 on the power supply 1 board.
(2) Disconnect the harness from the connector CN44 and
on the power supply 2 board.
CN45
(3)
, CN62,
Speaker board
Fig.12
CN63
CN65
CN62
II
CN61
CN64
Fig.13
(fixing the
lug wire)
CN44/CN45
(on the power
supply 2 board)
Power supply 1 board
(No.22008)1-11
3.1.15 Removing the power transformer 1 with the power supply 2 board
(See Fig.14)
• Prior to performing the following procedure, remove the top
cover and power supply 1 board.
(1) Disconnect the harness from the connector CN46 and
on the power supply 2 board.
CN47
(2) Remove the two screws J attaching the power transformer
1.
3.1.16 Removing the thermal SW 1 board
(See Fig.14)
• Prior to performing the following procedure, remove the top
cover and power supply 1 board.
(1) Remove the screw K attaching the thermal SW 1 board.
3.1.17 Removing the power transformer 2
(See Fig.15 and 16)
• Prior to performing the following procedure, remove the top
cover and power supply 1 board.
(1) Disconnect the harness from the con nector CN701
power amp. board.
(2) Unsolder the solder points PW81
trans board.
(3) Remove the four screws L attaching the power transformer
2.
and PW82 on the power
on the
Thermal SW
CN47
1 board
K
Power supply 2 board
CN46
J
Power
transformer 1
Fig.14
Power amp. board
CN701
Power trans
board
LL
Fig.15
PW81
PW82
Power
transformer 2
Fig.16
1-12 (No.22008)
3.1.18 Removing the power transformer 3 with the power supply 3 board
(See Fig.17)
• P rior to performing the following procedure, remove the top
cover, power supply 1 board, power transformer 1 a nd power
transformer 2.
(1) Disconnect the harness from the connector CN41
power supply 3 board.
(2) Remove the two screws M attaching the power transformer
3.
on the
M
3.1.19 Removing the power/ fuse board
(See Fig.18)
• P rior to performing the following procedure, remove the top
cover, rear panel, power supply 1 board and power transformer 2.
(1) Disconnect the harness from the connector CN25
power/ fuse board.
(2) Remove the four screws N attaching the power/ fuse
board.
(3) Unsolder the solder points PW21
on the power/ fuse board.
, PW22, PW23 and PW24
on the
CN25
N
Power supply 3 board
CN41
Power
transformer 3
Fig.17
N
PW23 (red)
PW21 (blue)
PW24 (white)
N
PW22 (brown)
3.1.20 Removing the head phone board
(See Fig.19 and 20)
• P rior to performing the following procedures, remove the top
cover and front panel assembly.
(1) Disconnect the harnesses from the connector CN981
the system control board (see fig.5) and CN738 on the
power amp. board.
(2) Removing the nut O fixing the head phone board.
(3) Removing the screw P attaching the lug wire and bra cket.
Lug wire
Bracket
on
O
P
Head phone board
Fig.19
Barrier
Q
(Front side)
Power/ fuse board
Fig.18
Q
Power
amp.
assembly
Power amp.
board
R
CN738
Fig.20
(No.22008)1-13
3.1.21 Removing the power amp. Assembly
(See Fig.20 and 21)
• Prior to performing the following procedures, remove the top
cover, rear panel, front panel assembly, system control board,
DSP board, audio signal 1 board, audio signal 2 board, video
board, S video board, V compo 1 board and speaker board.
(1) Remove the three screws Q fixing the barriers, and remove
the tow barriers.
(2) Remove the eight screws R attach ing the power amp. as-
sembly.
(3) Pull up the power amp. assembly.
Barrier
Q
Q
Power
amp.
assembly
Power amp.
board
(Front side)
R
CN738
Fig.20
(Rear side)
R
Fig.21
1-14 (No.22008)
3.2 Power amp. assembly section
3.2.1 Removing the relay board & Rch amp. board & Lch amp. board & Cch amp. board & SL/SRch amp. board
(See Fig.1 to 3)
• Prior to performing the following procedure, remove the power
amp. assembly.
(1) Disconnect the harness from the two connectors on each
thermal compensation board (top side).
(2) Remove the two screws A attaching the relay board.
(3) Disconnect the harness from the five connectors on each
thermal compensation board (bottom side).
(4) Pull up each amp. board of Lch, Cch, SL/SRch and Rch
from the power amp. board with the relay board.
(5) Remove each amp. board from the connector CN721
, CN781 and CN761 on the relay board.
CN821
,
Fig.1
Cch amp. board
Lch amp. board
Relay board
A
top side
Connector
(on the thermal
compensation
board)
bottom side
CN713
CN813
CN773
CN753
Power amp. board
Connector (on the thermal
compensation board)
Cch amp. board
Lch amp. board
CN721 CN821
A
Fig.2
CN781
CN712
CN812
CN772
CN752
Connector
(on the thermal
compensation
board)
SL/SRch amp. board
Rch amp. board
SL/SRch amp. board
Rch amp. board
CN761
Relay board
Fig.3
(No.22008)1-15
3.2.2 Removing the thermal SW 2 board
(See Fig.4)
• Prior to performing the following procedure, remove the power
amp. assembly, relay board and each amp. board of Lch, Cch,
SL/SRch, Rch.
(1) Remove the screw B attaching the thermal SW 2 board.
3.2.3 Removing the heat sink
(See Fig.4 to 6)
• Prior to performing the following procedure, remove the power
amp. assembly, relay board and each amp. board of Lch, Cch,
SL/SRch, Rch.
(1) Remove the eight screws C attaching the heat sink on the
both sides of the power amp. assembly.
(2) Remove the eight screws D attaching the power ICs (top
side).
(3) Remove the twenty screws D attaching the power ICs (bot-
tom side).
Heat sink
Power ICs
C (both sides)
Fig.4
B
Thermal SW 2 board
top side
Heat sink
bottom side
DD
Fig.5
bottom side
Heat sink
DD
1-16 (No.22008)
Fig.6
3.3 Front panel assembly section
3.3.1 Removing the FL display board & front AV in board
(See Fig.1 and 2)
• P rior to performing the following procedure, remove the top
cover and front panel assembly.
(1) Pull out the volume knob on the front side of the front panel
assembly and remove the nut attaching the FL display
board.
(2) Remove the three screws A attaching the front AV in board
and remove the front AV in board.
(3) Remove the nine screws B attaching the FL display bo ard
on the back of the front panel assembly.
(4) Disconnect the harness from the connector CN969
and CN982 on the FL display board.
, CN975
Operation switch panel
Door
B
Front panel assembly
Volume knob
Fig.1
FL display board
B
Nut
CN969
CN975
CN973
A
3.3.2 Removing the power switch board & front DIGITAL in board & motor assembly
(See Fig.3)
• P rior to performing the following procedure, remove the front
panel assembly and FL display board.
(1) Remove the four screws C attaching the power switch
board and remove the power switch board.
(2) Remove the screw D attaching the front DIGITAL in board
and remove the front DIGITAL in board.
(3) Remove the three screws E attaching the motor assembly
on the back of the front panel assembly.
(4) Remove the belt and the two screws a attaching the motor.
3.3.3 Removing the door input board
(See Fig.3 and 4)
• P rior to performing the following procedure, remove the front
panel assembly and FL display board.
(1) Remove the four screws F attaching the door and remove
the door from the front panel assembly.
(2) Remove the six screws G attaching the door input board.
Front DIGITAL
in board
CN373
Front AV in board
D
CN373
CN982
B
Fig.2
Power switch board
FF
Door
Fig.3
C
E
Belt
Motor assembly
G
a
Door input board
Door
Fig.4
(No.22008)1-17
SECTION 4
ADJUSTMENT
4.1 Adjustment of idling current
Measuring point Alignment point Measuring condition
Lch B903
Rch B911
Cch B907 & B908 VR801
SLch B907 & B908 VR771
SRch B909 & B910 VR772
SBLch B901 & B902 VR702
SBRch B913 & B914 VR752
Attention:
This adjustment does not obtain a correct adjustment value immediately after the amplifier is used (state that an internal temperature
has risen).
Please adjust immediately after using the amplifier after turning off the power supply of the amplifier and falling an internal temperature.
Adjustment method
(1) Prior to turning the power ON, fully turn the adjusting resistor (VR701
terclockwise direction and connect the DC voltmeter to the measuring terminal ( B901-B902, B903-B904, B905-B906, B907-
B908, B909-B910, B911-B912, B913-B914).
(2) Adjust the resistor so that the measured value becomes 2.0mV just after the power supply is turned on.
(3) Adjust the resistor so that the measured value becomes 2.5mV more than 60 seconds afte r the power supply is turned on.
(4) After stability is 1.0-4.0mV.
& B904 VR701 No load and No signal.Rated line voltage
& B912 VR751
SURROUND : OFF
Room temperature : 20~25ºC
, VR702, VR751, VR752, VR771, VR772, VR801) coun-
Refer to following page "Idling Current graph".
* It is not abnormal though the idling current might not b ecome 0mA even if it is finished to turn variable resistance ( VR701
, VR752, VR771, VR772, VR801) in the direction of counterclockwise.
VR751
B901, B902 (SBLch)
B903, B904 (Lch)
VR701 (Lch)
VR702 (SBLch)
B905, B906 (SLch)
VR801 (Cch)
B907, B908 (Cch)
VR771 (SLch)
VR772 (SRch)
B909, B910 (SRch)
VR751 (Rch)
VR752 (SBRch)
B911, B912 (Rch)
, VR702,
1-18 (No.22008)
B913, B914 (SBRch)
4.2 Idling Current graph (1/2)
4
3.5
3
2.5
2
1.5
1
Voltage at measering point(mV)
0.5
SL ch / SR ch
SL ch
SR ch
0
02468101214
Time(Min)
SBL ch / SBR ch
4
3.5
3
2.5
2
1.5
1
Voltage at measering point(mV)
SBL ch
SBR ch
0.5
0
02468101214
Time(Min)
(No.22008)1-19
4.3 Idling Current graph (2/2)
4
3.5
3
2.5
2
1.5
1
Voltage at measering point(mV)
0.5
L ch / R ch
L ch
R ch
0
02468101214
Time(Min)
C ch
4
3.5
3
2.5
2
1.5
1
Voltage at measering point(mV)
0.5
0
02468101214
1-20 (No.22008)
Time(Min)
SECTION 5
TROUBLE SHOOTING
This service manual does not describe TROUBLE SHOOTING.
(No.22008)1-21
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.22008)
Printed in Japan
WPC
SCHEMATIC DIAGRAMS
AUDIO/VIDEO CONTROL RECEIVER
RX-DP20VBK
CD-ROM No.SML200307
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
TAN M TRN
S AND Y
ON
2
O
Z NE 1
Z NE 2
TVCA V D S
VR 1
N/ FF O/ O F
T ND Y ON T ND Y ON
ONE 2 EARNZO E 1
DVD
D MU
CDDRPH N
P/M
CR V R
T 1C
MA MI EOV D S
ANLO / I IT L
FFCT
NP T
123
L EN SS
SOU D
456
ET
/P
89
7
STA NDBY
STA NDB Y /O N
MASTE R VOLUME
CC CONV R TER
ZONE 1
ON/OFF
ZONE 2
ON/OFF
HONES
RX DP 20V
AUDIO/VIDEO CONTROL REC EIVER
DMMER
DOOR
UP
DOOR
DOWN
VID O L AUDIO R
S-V DEODGI A L
VIDE O
CC ON ER ER
RT RN
HX
X E/ 7 1
SL EP DIMM R
/ EW
DOWN P
REC
CHANNL
TV VOL
EU P
MNU
TX T
I L A
V
MEU
RMSRX D 20J
AV O NTR OL R CE VER
10 100
PLAY
TUNNG
M MODE
DP UR / SPURRU ND
AN LOG DR CT
STOP PAU E
TVV DEO
MUTNG
ST
I HT
RM OTE ONT ROL
00
OF
V
CT V
BS
FF
VOLUME
A J ST
ENU
XT
Contents
Block diagrams
Standard schematic diagrams
Printed circuit boards
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
2-1
2-7
2-29 to 49
No.22008SCH
2003/7
RX-DP20VBK
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.
(This regulation does not correspond to J and C version.)
RX-DP20VBK
< MEMO >
RX-DP20VBK
o
b
P
Block diagrams
Signal input/output & Main section
5
DSP board
CN631
WR632
IC601
CN635
IC602
WR204
CN207CN201
Audio signal 1 board
4
WR307
WR322
3
Y/C sep board
CN482
CN203
CN223
WR323
Audio signal 2 board
CN481
WR403CN402
Video
board
CN202,
CN204
CN221
CN321
CN325
CN401
CN6
CN15
CN7
CN5
CN3
CN11
WR701 WR702
WR703
CN761 CN721
CN781
CN821
Lch/SBLch PRE AMP b
IC603
CN751 CN711
IC604
Rch/SBRch PRE AMP
IC605
CN771
IC606
L/R Surround PRE AM
IC607
CN811
WR453
CN452
S Video board
CN451
CN8
WR14
Center PRE AMP board
System control board
2
Video sep board
CN502
CN581
CN501
CN9
CN1
CN2
CN963
CN964
IC961
CN985
CN983
WR961
CN25
Component video board
Front AV
Audio signal 3 board
WR700
board
CN973
WR26
1
CONPU LINK board
CN301
2-1
ABC D
RX-DP20VBK
2
1
AMP board
AMP board
Q710
Q711
Q1710
Q1711
Q760
Q761
Q1760
Q1761
Q1610
Q1611
Q1660
Q1661
CN712
CN713
CN752
CN753
CN772
CN773
CN722
CN723
CN762
CN763
CN782
CN783
Q714
Q715
Q1714
Q1715
Q764
Q765
Q1764
Q1765
Q1614
Q1615
Q1664
Q1665
WR731
WR732
WR733WR734WR735
WR736
WR737
CN741
CN742
RY901
RY902
RY906
RY904
RY905
L
FRONT
R
L
FRONT
SPK2
R
CENTER
REAR L
REAR R
S. BACK L
S.BACK R
SPK1
E AMP board
Speaker board
P board
Q810
Q811
WR986
WR984
CN812
CN813
FL Display board
Q814
Q815
CN822
CN823
Power AMP board
DI961
IC962
Q772
PROTECTER
WR969
CN982
RY751
CN738
CN970
Power sw board
Input select sw board
KEY
KEY
Q1991 to Q1996
CN743
H/P board
WR85
PROTECTER
HDE F G
2-2
RX-DP20VBK
D
C
S
B
r
D
S
P
R
S
S
M
Audio signal 1 section
CN207
PHONO
IC201
EQ
TUNER
IC262
V SIG L/R
SUB VI L/R
SUB ROOM
5
CD
TAPE/MD
REC
TAPE/MD
P. B
IC202
IC203
IC212
SUB ROOM
SWITCH
SOURCE
CDR
SELECTOR
REC
CDR
4
P. B
IC211
A/D
DVD
FRONT
FRONT L/R
SW
DVD
C/SW
DVD
REAR
VOLUME
IC221
Volume
IC222
Volume
IC223
Volume
IC224
Volume
SUBROO
IC213
A/D SW
CENTER/
SB L/R
A/
A/D.
A/D.
A/D.S
F
Sr L/
3
1
2
CN201
Audio signal 3 section
FRONT
L/R
C/SW
SURR.
L/R
IC701
Amp
IC702
Amp
IC703
Amp
ZIST. L/R
ZIST. C/SW
ZIST.S L/R
ZIST.SB L/R
ZIST. L/R
ZIST. C/SW
ZIST.S L/R
RY271
RY272
RY273
WR700
RY274
RY275
RY276
RY277
DS
D
D
2-3
SURR.B
L/R
IC704
ZIST.SB L/R
Amp
ABC D
Audio signal 2 section
RX-DP20VBK
R
R
A/D. L/R,
A/D. C/SW,
A/D.S L/R,
A/D.SB L/R
ROOM L/R
Fr L/R
3
W
TER/SW
Sr L/R
L/R
CN223
WR204
CN221
TV/DBS
VCR1
REC
VCR1
P. B
VCR2
REC
VCR2
P. B
FRONT
L/R
C/SW
SURR.
L/R
SURR.B
L/R
IC321
IC322
SOURCE
SELECTOR
Q323,Q324
Q329,Q330,Q351
Mute
VIDEO L/R
V SIG L/R
SUB.VI L/R
SUBROOM L/R
Fr L/R
CENTER/SW
Sr L/R
SrB L/R
WR322
WR323
CN321
CN325
DSP. L/R
DSP. C/SW
DSP.S L/R
DSP.B L/R
CN202CN204
CN203
PRE OUT
Video SEP section
Y1
Cb1
Cr1
Y2
Cb2
Cr2
RY501
to
RY506
SW
IC503
IC502
Y/C
COMPONENT
CONVERTER
CN501CN502
Y
Cb
Cr
Cr3,Cb3,Y3
OUTCr,OUTCb,OUTY
HDE F G
2-4
RX-DP20VBK
n
M
N
N
C
C
5
4
Video section
TV/
DBS
VCR1
VCR2
SUBROOM.R
R
P
R
P
DVD
MON
ZONE2
SELECTOR
SUBROOM-R
IC401,
IC441
IC402,
IC403
SELECTOR
IC404
Y/C, V
IC405
OSD
VIDEO
VMIX
V.SEPA
V.OSDOUT
V.OSDIN
WR403
CN401
CN402
S-video sectio
TV/DBS
VCR1
VCR2
DVD
MON
ZONE2
SUBROOM.L
R
P
R
P
SUBROO
DSP section
CN631
3
DIGITAL
IN1
DIGITAL
IN2
DIGITAL
IN3
DIGITAL
IN4
2
DIGITAL
IN5
DIGITAL
IN6
DIGITAL
OUT
DIGITAL
IN7
WR636
1
IC673
DIR
&
SELECTOR
IC674
SELECTOR
DSP_RESET,DSP_READY
DSP_STATUS,DSP_CLK,
IC675
DIT
ANALOG IN
IC657
to
IC659
IC681
A/D DIR
SELECTOR
MOSI,MISO,SCK,
READY,CLKR1
DSP_RST,CSDSP
DSP_COMMOND,
IC666
DSP
IC671
LOCAL
MICOM
SB L/R
REC DATA
CC_DATA,CC_CLK,
CC_RST,CC_CS
IC651
SW
F L/R
C/LEF
S L/R
I
CO
I
CO
I
CON
I
CON
2-5
CN633
ABC D
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