JVC RXDP-20-VSL Service manual
22019200310
SERVICE MANUAL
AUDIO/VIDEO CONTROL RECEIVER
RX-DP20VSL
DVD
AUDIO
LEARN
TRANSMIT
TV/DBS
VCR 1
LEARN
DVD
DVD MULTI
CD
PHONO
CDR
TAPE/MD
VCR 1 VCR 2
EXT 7.1CH
FM/AMVIDEOTV/DBS
ANALOG/DIGITAL
EFFECT
INPUT
123
LIVENESS
SOUND
456
TEST
/P
89
7
STANDBY
STANDBY/ON
MASTER VOLUME
CC CONVERTER
RX-DP20V
AUDIO/VIDEO CONTROL RECEIVER
PHONES
DIMMER
DOOR
UP
DOOR
DOWN
VIDEO LÑAUDIOÑR
S-VIDEODIGITAL
VIDEO
CC CONVERTER
10
RETURN
THX
EX/ES/7.1
SLEEP DIMMER
/ REW
PLAY
PTY SEARCH
PTY PTY
REC
CHANNEL
TV VOL
SETUP
MENU
TEXT
DISPLAY
DVD
MENU
RM-SRXDP20R
A/V CONTROL RECEIVER
FM MODE
DSP SURR/DSPSURROUND
ANALOG DIRECT
STOP PAUSE
TV/VIDEO
MUTING
SET
LIGHT
REMOTE CONTROL
+
100
+
100
OFF
TV
CATV/
DBS
FF/
TA/NEWS/INFODISPLAY MODE
VOLUME
ADJUST
MENU
EXIT
Area Suffix
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
EV ------------- Eastern Europe
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.22019
2003/10
SPECIFICATION
Amplifier
Output Power
At Stereo operation
(Analog Direct On)
At Surround operation
(Analog Direct On)
Audio
Audio Input Sensitivity
/Impedance (1 kHz)
Audio Input (DIGITAL IN)* Coaxial 1(DVD), 2(CD), 3(TV/DBS):0.5 V(p-p)/75 Ω
* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)
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.
130 W per channel, min. RMS, driven into 8 Ω at 1 kHz, with no more than 0.8%
total harmonic distortion. (IEC 268-3/DIN)
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.
PHONO IN (MC):0.25 mV/100 Ω
PHONO IN (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 kΩ
Optical 4(CDR), 5(MD), 6(VCR1):-21 dBm to -15 dBm (660 nm ±30 nm)
Audio Output Level PREOUT:1 V
Recording Output Level TAPE/MD OUT, CDR OUT, VCR 1 OUT, VCR 2 OUT:200 mV
Digital output
Optical:DIGITAL OUT
Signal-to-Noise Ratio
('66 IHF/'78 IHF)
(Analog Direct On)
Frequency Response
(8 Ω)
RIAA Phono Equalization ±1.0 dB (20 Hz to 20 kHz)
Video
Video Input Sensitivity
/Impedance
Video Output Level Composite video:VCR 1 OUT,VCR 2 OUT,MONITOR OUT 1 V(p-p)/75 Ω
Synchronization Negative
Signal-to-Noise Ratio 45 dB
Tuning Range 87.5 MHz to 108.0 MHz
Usable Sensitivity Monaural:17.0 dBf (1.95 µV/75 Ω)
50 dB Quieting Sensitivity Monaural:21.3 dBf (3.2 µV/75 Ω)
Signal-to-Noise Ratio
(IHF-A weighted)
Signal wave length:660 nm
Output level:-21 dBm to -15 dBm
PHONO IN (MC):60 dB/72 dB (at REC OUT)
PHONO IN (MM):72 dB/80 dB (at REC OUT)
CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN:92 dB/80 dB
:92 dB/80 dBDVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO
PHONO IN (MC) :20 Hz to 20 kHz (±1 dB)
PHONO IN (MM):20 Hz to 20 kHz (±1 dB)
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)
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 (Y: luminance):1 V(p-p)/75 Ω
S-video:VCR 1 OUT, VCR 2 OUT, MONITOR OUT (Y: luminance):1 V(p-p)/75Ω
Component:MONITOR OUT (Y: luminance):1 V(p-p)/75 Ω
Stereo:41.3 dBf (31.5 µV/75 Ω)
Monaural:78 dB at 85 dBf
Stereo:73 dB at 85 dBf
1 V(p-p)/75 Ω
(Y: luminance)1 V(p-p)/75Ω
(C: chrominance, burst)0.286 V(p-p)/75 Ω
(PB, PR):0.7 V(p-p)/75 Ω
(C: chrominance, burst):0.286 V(p-p)/75 Ω
(PB, PR): 0.7 V(p-p)/75 Ω
1-2 (No.22019)
Total Harmonic Distortion Monaural:0.4% at 1 kHz
Stereo:0.6% at 1 kHz
Stereo Separation at REC
OUT
Alternate Channel Selectivity
Frequency Response 30 Hz to 15 kHz (+0.5 dB, -3 dB)
Tuning Range MW:522 kHz to 1 629 kHz
Usable Sensitivity Loop antenna: 400 µV/m
Signal-to-Noise Ratio 50 dB (100 mV/m)
Power Requirements AC 230V~, 50 Hz
Power Consumption 600 W/690 VA (at operation), 2.7 watts (in standby mode)
Dimensions (W × H × D) 445 mm × 177 mm × 475 mm
Mass 24 kg
Designs & specifications are subject to change without notice.
35 dB at 1 kHz
60 dB (±400 kHz)
AM (MW/LW) tuner
LW:144 kHz to 288 kHz
General
(No.22019)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 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
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.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
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 exposed
metal part.
1-4 (No.22019)
1.5 Safety Precautions (U.K only)
(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-
tinued 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.
(2) Any unauthorised design alterations or additions will void t he manufacturer's guarantee; furthermore the manufacturer cannot
accept responsibility for personal injury or property damage resulting therefrom.
(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never
be replaced by parts other than those listed in the manual. Please not e however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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 shoul d be confirmed that they have been returned to
normal, after re-assembling.
1.5.1 Warning
(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are mainta ined.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by appro ved parts.
(6) If mains voltage selector is provided, check setting for local voltage.
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.
(No.22019)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.22019)
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
arrow while pulling both sides outward.
3.1.2 Removing the front panel assembly
(See Fig.2 and 3)
• Prior 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 panel
assembly.
(4) Remove the four screws D attaching the front panel
assembly on bottom of the body. Detach the front panel
assembly toward the front.
(5) Disconnect the harness from the connector CN971
CN977, CN983 a nd CN985 on the system control board
(see fig.5), CN973 on the front AV in board and CN373 on
the front DIGITAL in board (see 2-3.Front panel assembly
section/ fig.2).
Top cover
B
(both sides)
A
(both sides)
Fig.1
C
Audio signal
1 board
a
(fixing the
lug wire)
,
CN201
Tie band 3
Front panel assembly
Tie band 1
C
Harness
band
3.1.3 Removing the V compo 2 board & 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 connecto r CN581
V compo 2 board.
Remove the two screws E' attaching the V compo 2 board
to the rear panel.
(2) Disconnect the card wire from th e connector CN1
tuner unit.
Remove the two screws E'' attaching the tuner unit to the
rear panel.
(3) Disconnect the harness from the connecto r CN301
compu link board.
Remove the two 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
and CN482 on the Y/C separator board.
on the
on the
on the
Y/C separator
board
CN482
CN481
V compo 2 board
D
Tie band 2
CN581
Fig.2
Audio 7.1ch
in board
CN1
Tuner unit
D
Compu
link board
Front panel
assembly
CN301
Fig.3
(No.22019)1-7
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 thirty-eight screws E & E' & E'' & E''' & E''''
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.
3.1.7 Removing the system control board
(See Fig.5 and 6)
• Prior 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 on the power/ fuse board.
(4) Disconnect the connector CN324 on the audio signal 2
board and CN234
(5) Remove the three plastic rivet.
on the audio signal 1 board.
on the
on the
Rear panel
E
FF
CN983
CN977
Plastic rivet
Solder part
EE
E
CN981
AC inlet
Black
Red
E''''E'
E''
F
F
Fig.4
System control board
CN985
E'''
E
Plastic rivet
E
F
F
CN234
CN224
CN203
CN324
CN963
CN964
Fig.5
Tie band
Audio signal 2 board
Audio signal 1 board
Fig.6
CN971
CN45
(on power
supply 2
)
board
Tie band
CN25
Power/ fuse
board
1-8 (No.22019)
3.1.8 Removing the DSP board & shield cover
(See Fig.7)
• Prior 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
on the DSP board.
on the audio signal 1
board.
And cut off the tie bands fixing the harness.
(3) Removing the two plastic rivet, and disconnect the
connector CN633
, CN643 and CN635 on the DSP board.
(4) Removing the screw G attaching the shield cover and
remove the shield cover.
Top view
G
Shield cover
CN631
CN203
Audio signal
1 board
DSP board
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, CN207 and CN223 on the audio
CN204
signal 1 board.
(2) Remove the plastic rivet.
(3) Disconnect the connector CN205
, CN221 and CN206 on
the audio signal 1 board.
,
Plastic rivet
CN204
CN202
CN633
CN205
CN643
CN234
CN221
Plastic rivet
Fig.7
CN224
CN206
Fig.8
CN635
CN207
CN223
Audio signal 1 board
(No.22019)1-9
3.1.10 Removing the audio signal 2 board & video board & S video board
T
(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
Input base board
signal 1 board.
(1) Disconnect the harness from the con nector CN973
on the
front AV in board (see 2-3.Front panel assembly section/
fig.2).
(2) Disconnect the harness from the con nector CN324
on the
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 fro m the connector CN7
on the
input base board.
(5) Remove the S video board from the connector CN8
input base board.
on the
Audio signal 2 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
on
Connection between the Input base board and each board.
CN15/CN6
the input base board.
Video board
CN7
CN8
CN9
CN324
FRONT
V compo 1 board
S video 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
FRON
CN15
CN6
CN7
CN8
CN9
Fig.11
1-10 (No.22019)
3.1.12 Removing the input base board
(See Fig.12)
• Prior 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
on the
power supply 1 board and CN44 on the power supply 2
board.
And cut off the tie bands fixing the harness.
(2) Disconnect the harness from the connector CN
743 on the
speaker board.
(3) Disconnect the card wire from the connector CN1
, CN2
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)
• Prior to performing the following procedure, remove the top
cover and rear panel.
(1) Disconnect the harness from the connector CN741
, CN742
and CN743 on the speaker board.
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)
• Prior to performing the following procedure, remove the top
cover.
(1) Disconnect the harness from the connector CN61
, CN64 and CN65 on the power supply 1 board.
CN63
, CN62,
(2) Disconnect the harness from the connector CN44 and
CN45 on the power supply 2 board.
(3) Remove the six screws I attaching the power supply 1
board.
Speaker board
Fig.12
CN63
CN65
CN62
II
CN61
CN64
(fixing the
lug wire)
Power supply 1 board
CN44/CN45
(on the power
supply 2 board)
Fig.13
(No.22019)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 PW82
PW83(E/EN ver.) on the power trans board.
(3) Remove the four screws L attaching the power transformer
2.
and PW81(B ver.) /
on the
Thermal SW
FRONT
CN47
1 board
K
Power supply 2 board
CN46
J
Power
transformer 1
Fig.14
Power amp. board
CN701
Power trans
3.1.18 Removing the power transformer 3 with the power supply 3 board
(See Fig.17)
• Prior to performing the following procedure, remove the top
cover, power supply 1 board, power transformer 1 and 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
board
L
Fig.15
PW81(B ver.)
PW83(E/EN ver.)
PW82
L
Power
transformer 2
Fig.16
Power supply 3 board
CN41
1-12 (No.22019)
Power
transformer 3
M
Fig.17
3.1.19 Removing the power/ fuse board
(See Fig.18)
• Prior 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.
3.1.20 Removing the head phone board
(See Fig.19 and 20)
• Prior 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.
, PW22, PW23 and PW24
on the
on
CN25
N
Lug wire
P
N
PW23 (red)
PW21 (blue)
PW24 (white)
N
PW22 (brown)
Power/ fuse board
Fig.18
Bracket
O
CN738
Barrier
Q
(Front side)
Head phone board
Fig.19
Q
Power
amp.
assembly
Power amp.
board
R
Fig.20
(No.22019)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 attaching the power amp.
assembly.
(3) Pull up the power amp. assembly.
(Rear side)
R
Fig.21
1-14 (No.22019)
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
top side
Connector
(on the thermal
compensation
board)
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
Lch amp. board
Cch amp. board
Relay board
bottom side
A
CN713
CN813
CN773
CN753
Connector
(on the thermal
compensation
board)
Power amp. board
Cch amp. board
Lch amp. board
A
Fig.2
CN721 CN821
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.22019)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
(bottom side).
top side
Heat sink
Heat sink
Power ICs
C (both sides)
Fig.4
bottom side
B
Thermal SW 2 board
bottom side
Heat sink
Fig.5
DD
DD
Fig.6
1-16 (No.22019)
3.3 Front panel assembly section
3.3.1 Removing the FL display board & front AV in board
(See Fig.1 and 2)
• Prior 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
3.3.2 Removing the power switch board & front DIGIT AL in board & motor assembly
(See Fig.3)
• Prior 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.
Front DIGITAL
A
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
a
(No.22019)1-17
3.3.3 Removing the door input board
(See Fig.3 and 4)
• Prior 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.
G
Door input board
Door
Fig.4
1-18 (No.22019)
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 termina l (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 mo re than 60 seconds after the power supply is turned on.
(4) After stability is 1.0-4.0mV.
& B904 VR701 No load and No signal.Rated li n e 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 become 0mA even if it is finish ed to turn variable resista nce ( 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,
B913, B914 (SBRch)
(No.22019)1-19
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
1-20 (No.22019)
Time(Min)
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
Time(Min)
(No.22019)1-21
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
1-22 (No.22019)
(No.22019)1-23
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.22019)
Printed in Japan
WPC
SCHEMATIC DIAGRAMS
AUDIO/VIDEO CONTROL RECEIVER
RX-DP20VSL
CD-ROM No.SML200310
Area suffix
B ------------------------------- U.K.
E ----------- Continental Europe
EN ------------ Northern Europe
DVD
AUDIO
LEARN
TRANSMIT
TV/DBS
VCR 1
LEARN
DVD
DVD MULTI
CD
PHONO
CDR
TAPE/MD
VCR 1 VCR 2
EXT 7.1CH
FM/AMVIDEOTV/DBS
ANALOG/DIGITAL
EFFECT
INPUT
123
LIVENESS
SOUND
456
TEST
7/P89
STANDBY
STANDBY/ON
MASTER VOLUME
CC CONVERTER
RX-DP20V
AUDIO/VIDEO CONTROL RECEIVER
PHONES
DIMMER
DOOR
UP
DOOR
DOWN
VIDEO LÑAUDIOÑR
S-VIDEODIGITAL
VIDEO
CC CONVERTER
10+100
RETURN
THX
EX/ES/7.1
SLEEP DIMMER
/ REW
PTY SEARCH
PTY PTY
REC
CHANNEL
TV VOL
SETUP
MENU
TEXT
DISPLAY
DVD
MENU
RM-SRXDP20R
A/V CONTROL RECEIVER
FM MODE
DSP SURR/DSPSURROUND
ANALOG DIRECT
PLAY
STOP PAUSE
TV/VIDEO
MUTING
SET
LIGHT
REMOTE CONTROL
+
100
OFF
TV
CATV/
DBS
FF/
TA/NEWS/INFODISPLAY MODE
VOLUME
ADJUST
MENU
EXIT
Contents
Block diagrams
Standard schematic diagrams
Printed circuit boards
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
2-1
2-4
2-15 to 25
No.22019SCH
2003/10
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