JVC RX-5042S User manual

SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB171
2004/3
AUDIO/VIDEO CONTROL RECEIVER
MB17120043
RX-5042S
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada

1-2 (No.MB171)
SPECIFICATION
Designs and specifications are subject to change without notice.
Amplifier
Output Power
At Stereo operation Front channels 100 W per channel, min. RMS, driven into 8 Ω, 40 Hz to 20 kHz with
no more than 0.8% total harmonic distortion.
At Surround operation Front channels 100 W per channel, min. RMS, driven into 8 Ω, at 1 kHz with no more
than 0.8% total harmonic distortion.
Center channel 100 W, min. RMS, driven into 8 Ω, at 1 kHz with no more than 0.8%
total harmonic distortion.
Surround channels 100 W per channel, min. RMS, driven into 8 Ω, at 1 kHz with no more
than 0.8% total harmonic distortion.
Audio
Audio Input Sensitivity/
Impedance (1 kHz)
CD, TAPE/CDR, VCR, TV SOUND, DVD:220 mV/47 kΩ
Audio Input (DIGITAL IN)* Coaxial DIGITAL 1 (DVD):0.5 V(p-p)/75 Ω
Optical DIGITAL 2 (CD):-21 dBm to -15 dBm (660 nm ±30 nm)
* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency-32 kHz, 44.1 kHz, 48 kHz)
Recording Output Level TAPE/CDR, VCR:220 mV
Signal-to-Noise Ratio('66 IHF/'78 IHF) CD, TAPE/CDR, VCR, TV SOUND, DVD:87 dB/74 dB
Frequency Response (8 Ω) CD, TAPE/CDR, VCR, TV SOUND, DVD:20 Hz to 50 kHz (+1 dB, -3 dB)
Bass Boost +3 dB ±1 dB at 100 Hz (Only for RX-6040B/RX-6042S)
Equalization (5 bands) 63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz (±8 dB in 2 dB steps)
Video
Video Input Sensitivity/Impedance Composite video:DVD, VCR 1 V(p-p)/75 Ω
Video Output Level Composite video:VCR, MONITOR OUT 1 V(p-p)/75 Ω
Synchronization Negative
Signal-to-Noise Ratio 45 dB
FM tuner (IHF)
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:16.0 dBf (1.7 µV/75 Ω)
Stereo:37.5 dBf (20.5 µV/75 Ω)
Stereo Separation at OUT (REC) 35 dB at 1 kHz
AM tuner
Tuning Range 530 kHz to 1 710 kHz
General
Power Requirements AC 120V , 60 Hz
Power Consumption 200 W/260 VA (at operation):2 W (in standby mode)
Dimensions (W ×H ×D) 435 mm ×146.5 mm ×369.5 mm (17 3/16 in. ×5 13/16 in. ×14 5/8 in.)
Mass 7.5 kg (16.6 lbs)

(No.MB171)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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF 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.MB171)
1.5 Importance administering point on the safety
Caution: For continued protection against risk of
fire, replace only with same type 6.3A/125V for
F201, 2A/125V for F202 and F203, 5 A/125 V for
F206 and F207.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F201 comme le meme type
que 6,3 A/125 V, 2 A/125 V pour F202 et F203, et
5 A/125 V pour F206 et F207.
Ce sont des fusibles suretes qui functionnes rapide.
^
Secondary parts
(Power transformer board 1)
Primary part
(Power / Fuse board)
5A-125V
F206
5A-125V
F207
2A-125V
F202
2A-125V
F203
6.3A-125V
F201

(No.MB171)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MB171)
SECTION 3
DISASSEMBLY
3.1 Removing the top cover
(See Fig.1)
(1) From the right and left sides of the main body, remove the
four screws Aattaching the top cover.
(2) From the back side of the main body, remove the three
screws Battaching the top cover.
(3) Remove the top cover in the direction of the arrow 2 while
extending the lower sections of the top cover in the
direction of the arrow 1.
Fig.1
3.2 Removing the front panel assembly
(See Figs.2 and 3)
• Prior to performing the following procedures, remove the top cover.
(1) Disconnect the card wire from the connector CN402 on the
front board. (See Fig.2.)
(2) Disconnect the card wire from the connector CN201 on the
power supply board. (See Fig.2.)
(3) Remove the tie band and remove the wire protection board
fixing the card wire. (See Fig.2.)
(4) Remove the three screws Cattaching the front panel
assembly. (See Fig.2.)
(5) From the bottom side of the main body, remove the four
screws Dattaching the front panel assembly. (See Fig.3.)
(6) Remove the front panel assembly in the direction of the
arrow. (See Fig.3.)
Fig.2
Fig.3
B
A
A
2
1
1
Top cover
C
Front panel assembly
Card wire
CN201
Power supply board
Tie band
Wire protection board
Card wire
CN402 Front board
CC
DD
Front panel assembly

(No.MB171)1-7
3.3 Removing the rear panel
(See Fig.4)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back side of the main body, remove the strain
relief from the rear panel in the direction of the arrow.
(2) Remove the twenty-one screws Eattaching the rear panel.
Fig.4
3.4 Removing the tuner
(See Fig.5)
• Prior to performing the following procedures, remove the top
cover.
(1) Disconnect the card wire from the connector CN411 on the
front board.
(2) Take out the tuner.
Fig.5
3.5 Removing the DSP board, audio input board, DVD board and video board
(See Fig.6)
• Prior to performing the following procedures, remove the top
cover and rear panel.
(1) From the top side of the main body, disconnect the DSP
board from the connector CN481 and CN482 on the front
board.
(2) Disconnect the audio input board from the connector
CN421 on the front board.
(3) Disconnect the DVD board from the connector CN431 on
the front board.
(4) Disconnect the video board from the connector CN441 on
the front board.
Fig.6
E
E
Strain
relief
Rear panel
Card wire CN411
Tuner
CN481
Front board
DVD board
Video board
CN421
Audio input board
DSP board
CN431
CN441
CN482

1-8 (No.MB171)
3.6 Removing the front board
(See Fig.7)
• Prior to performing the following procedures, remove the top
cover, rear panel, DSP board, audio input board, DVD board,
video board and tuner.
(1) From the top side of the main body, disconnect the card
wire from the connector CN402 on the front board.
(2) Disconnect the relay board from the connectors (CN291,
CN491) on the power supply board and front board.
(3) Disconnect the wires from the connectors CN471, CN472
and CN473 on the front board.
(4) Remove the two screws Fattaching the front board.
(5) Loosen the screw Gattaching the front board.
(6) Take out the front board from the main body.
Fig.7
3.7 Removing the speaker terminal board
(See Fig.8)
• Prior to performing the following procedure, remove the top
cover and rear panel.
From the top side of the main body, remove the solders from
the soldered sections aon the speaker terminal board.
Fig.8
CN491
CN402
Front board
Relay board
Power supply board
F
F
G
CN473
CN471
CN472 CN291
Card wire
Parallel wires
Speaker terminal board
Soldered sections a

(No.MB171)1-9
3.8 Removing the main board
(See Fig.9)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, remove the tie bands
fixing the wires.
(2) Remove the tie band and remove the wire protection board
fixing the card wire.
(3) Remove the solders from the soldered sections bon the
speaker terminal board attaching the parallel wires.
(4) Disconnect the relay board from the connectors (CN291,
CN491) on the power supply board and front board.
(5) Disconnect the parallel wire from the connector CN241 on
the power supply board.
(6) Disconnect the wire from the connector CN251 on the
power transformer board 1.
(7) Disconnect the wires from the connectors CN471, CN472
and CN473 on the front board.
(8) Remove the screw G, two screws Hand four screws J
attaching the main board.
(9) Take out the main board from the main body.
Fig.9
3.9 Removing the heat sink
(See Figs.10 and 11)
• Prior to performing the following procedures, remove the top
cover and main board.
(1) Remove the three screws Kattaching the heat sink. (See
Fig.10.)
(2) From the reverse side of the main board, remove the two
screws Lattaching the heat sink. (See Fig.11.)
3.10 Removing the power ICs
(See Figs.11)
• Prior to performing the following procedures, remove the top
cover, main board and heat sink.
(1) From the reverse side of the main board, remove the
solders from the soldered sections con the main board.
(2) Take out the power ICs.
Fig.10
Fig.11
Soldered sections b
CN471
CN472
CN491
Front board
CN473
Card wire
K
J
Tie band
Wire protection board
J
Tie bands
Main board
Relay board
JCN241
Power supply board
CN251
Tie band
CN291
Power
transforme
r
board 1
G
Parallel wires
Speaker terminal board
Heat sink
Main board
K
Power IC
Heat sink
L
L
Main board
Soldered section c

1-10 (No.MB171)
3.11 Removing the power transformer
(See Fig.12)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, remove the tie bands
fixing the wires.
(2) Remove the solders from the soldered section don the
power transformer board 1.
(3) Remove the solders from the soldered sections eon the
power transformer board 2.
(4) Disconnect the wire from the connector CN251 on the
power transformer board 1.
(5) Remove the four screws Mattaching the power
transformer.
(6) Take out the power transformer from the main body.
3.12 Removing the power/fuse board
(See Fig.12)
• Prior to performing the following procedures, remove the top
cover.
(1) From the back and top sides of the main body, remove the
screw Nand screw Pattaching the power/fuse board.
(2) Remove the solders from the soldered sections fattaching
the power cord.
(3) From the reverse side of the power/fuse board, remove the
solders from the soldered sections gattaching the wires.
Fig.12
CN251
Soldered section d
Soldered sections e
Soldered sections f
Soldered sections g
Tie band
Power transforme
r
Power
transformer
board 2
Power cord
M
M
P
N
M
M
Power transformer board 1
Power / Fuse board
Soldered sections g

(No.MB171)1-11
3.13 Removing the power supply board
(See Fig.13)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors CN203 and CN241 on the power
supply board.
(2) Disconnect the card wire from the connector CN201 on the
power supply board.
(3) Disconnect the relay board from the connector CN291 on
the power supply board.
(4) Remove the tie band fixing the parallel wire.
(5) Disconnect the parallel wire from the connector CN101 on
the headphone jack board.
(6) Remove the solders from the soldered section don the
power transformer board 1.
(7) Remove the three screws Qand screw Rattaching the
power supply board.
(8) From the reverse side of the power supply board, remove
the solders from the soldered sections hattaching the
wires.
3.14 Removing the headphone jack board
(See Figs.13 and 14)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) From the top side of the main body, remove the tie band
fixing the parallel wire. (See Fig.13)
(2) Disconnect the parallel wire from the connector CN101 on
the headphone jack board. (See Fig.13)
(3) From the front side of the main body, remove the special
nut and screw Sattaching the bracket (phones) to the front
bracket. (See Fig.14)
Fig.13
Fig.14
Q
Q
R
Card wire
CN201
CN101
Tie band
Headphone
jack board
CN241
CN203
Relay board
CN291
Power transformer board 1
Soldered section d
Soldered
section h
Parallel wires
Parallel wire
Power supply board
Q
Headphone jack board
Special nut
Front bracket
Bracket(phones)
S

1-12 (No.MB171)
3.15 Removing the system control board and power switch board
(See Figs.15 and 16)
• Prior to performing the following procedures, remove the top
cover and front panel assembly.
(1) Pull out the volume and jog knobs from the front side of the
front panel assembly, remove the nut attaching the system
control board. (See Fig.15)
(2) From the back side of the front panel assembly, remove the
nine screws Tattaching the system control board. (See
Fig.16)
(3) Disconnect the parallel wire from the connector CN714 on
the power switch board. (See Fig.16)
(4) Take out the system control board from the front panel
assembly.
(5) Remove the two screws Uattaching the power switch
board. (See Fig.16)
(6) Take out the power switch board from the front panel
assembly.
Fig.15
Fig.16
Nut
Volume knob
Front panel assembly
Jog knob
T
TT
U
Power switch board
System control board
Parallel wire
Front panel assembly
CN714

(No.MB171)1-13
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.

1-14 (No.MB171)
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.

(No.MB171)1-15

(No.MB171)
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
VICTOR COMPANY OF JAPAN, LIMITED
WPC
Printed in Japan

SCHEMATIC DIAGRAMS
No.MB171SCH
2004/3
COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LTD.
RX-5042S
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
2-1
2-3
2-15 to 21
CD-ROM No.SML200403
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
AUDIO/VIDEO CONTROL RECEIVER

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.)

< MEMO >

2-1
IC403
IC402
SOURCE
SELECTOR IC423
SELECTOR
IC428
6CH
MASTER
VOLUME
S
Y
C
IC427
Q71
Tu n e r
Block diagram
CN1
DSP_CLK,DSP_STATUS
DSP_READY,DSP_RESET
DSP_COMMAND
VOL_CLK
VOL_DATA
KEY_IN1
KEY_IN2
KEY_IN3
KEY_IN4
KEY_IN5
AM
FM
DVD
SW_OUT
CN411
CN431
CN481
CN401 CN421
DIGITAL_IN1
C
C
VIDEO1
VIDEO2
DCS
AVCOMPULINK
DSP_L/R
DSP_SL/SR
DSP_C
DSP_LFE
VCROUT_L/R
CD_L/R
TV_L/R
VCRIN_L/R
TAPEOUT_L/R
TAPEIN_L/R
SIG_L/R
TUNER_L/R,DVD_L/R
DVD_L/R
SW_OUT
J406 J404
J402 J403
CD
TAPE_PLAY
TAPE_REC
VCR_PLAY
TV_SOUND
VCR_REC
IN_L/R
CN482
SW_OUT
DVD_L/R
SW_OUT
J681
DIGITAL_IN2
UN682
IC601,IC602
FILTER
DSP
IC661
IC667
CODEC
with S/PIDF
IC611,IC612,IC613
IC615,IC621,IC622
IC632,IC633,IC634
FILTER
DSP, CODEC
CONTROLLER
IC671
LIN+/-
RIN+/-
A1+/-,B1+/-
A2+/-,B2+/-
A3+/-,B3+/-
CN683 CN681
S727
D719
CN714 CN704
STB_LED
KEY_IN2
S721 to S726
S728 to S732
S734,S735,S737
S740 to S743
S745,S746,S756
S750 to S752
RX0
RX1
Power switch
section
User control keys
System control
FL display section
Surround / Digital signal input terminal section
CN451
TU_DATAIN
TU_DATAOUT
TU_CLK
TU_CE
IC501
SELECTOR
P
R
AV_COMPULINK
J501
DVD
MONITOR
J502 J521 J591
DCS
CN441 CN501
Audio input terminal / Source select section
Video input terminal section
TUNER_L/R
DVD section Volume / Regulator / Sourc
e
AV_COMPULINK
DCS
VIDEO1
VIDEO2
SW_DATA
SW_STB
SW_CLK
SW_DATA
SW_STB
SW_CLK
Q1427
Q1428
Q1429
TU_MUTE
S_MUTE
Q702 to Q70
4
DCS
AVCOMPULI
N
DCS_IN,DCS_OUT
VCR_IN,VCR_OUT
DSP_IN_L/R
DSP.L/R
DSP.LS/RS
DSP.C
DSP.SW
CDIN,CDOUT
CCLK,INT
D_RST,D_CS
DSP_RST
SS,HREQ
MOSI,MISO
GPIO1 to GPIO4
D/A0 to D/A3
DATA,MCK,XTAL
S_BCK,S_LRCK
C_BLK,C_LRCK