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  9. Sherwood RV-5050RDS User manual

Sherwood RV-5050RDS User manual

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SERVICE
MANUAL
RV-5050RDS
STEREO
A/V
PRO-LOGIC
RECEIVER
Sherwood
Oremume
mAi/DIC.VIDEC
RECEIVER
RV.
5050ROS
OR
2
TL
OR
PCAN
Ran,
==
© ©
©
=cee9
=a
CONTENTS
«
Safety
PreCAUtiONS------ere
eee
cere
eter
tet
tee
cece
eee
e
eee eee
2
Exploded
VIEW
cece
ee
ccc nce cen
cence
cscecncceccscccanseatece
23
Specifications
wales
Bier
care
Madicsive’s
SSbrpe
station
Suse
esses
ewes
3
Printed
Circuit
Boards
----++---
ces cee cee
cee
cee
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eneeneees
25
Wiring
Diagram
ee
re
er
ee
ee
5
Mechanical
Parts
List
--------eeceseeeee
eee
ceeceeceeeeeaee
31
Block
Diagram
eerrerrerer
er
er
rer
errr
errs
reer
reer
errr
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es
7
Electrical
Parts
List
--------+ssseeeceeees
cee
ceceesseseeeees
32
Circuit
Description
----++++-++-++eseese
reste
ee
cee
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cee
ee
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9
Semiconductor
Lead
Identification
Alignment
PrOC@dAUres
cerrer
ee
eee
cee
er
eee
cet
eee
eee
ees
17
&
internal
Diagram
BG
ESis
ob.cia
sie
do
wien
ee
ae
es
bade's
waiea
sees
38
Troubleshooting
----:eeereceeereee
ee
te
reece
eects
tees
ees
20
Schematic
Diagrams(I,
II,
I.
[V)
--++--:eseeeeee
eee
45
|
G
Sherwood
SAFETY
PRECAUTIONS
WARNING
Before
servicing
this
unit,
familiarize
yourself
with
the
following
precautions:
1.
Many
electrical
and
mechanical
parts
in
this
chassis
have
special
safety
characteristics
that
often
pass
unnoticed
and
the
protection
afforded
by
them
cannot
necessarily
be
obtained
by
using
replacement
components
Replacement
parts
that
have
these
special
safety
characteristics
are
identified
in
this
manual
and
its
supplements:
electrical
components
having
such
features
are
identified
by
/A\
in
the
schematic
diagram
and
the
parts
list.
Before
replacing
any
of
these
components,
read
the
parts
list
in
this
manual
carefully.
The
use
of
substitute
replacement
parts
that
do
not
have
the
same
safety
characteristics
as
specified
in
the
parts
list
may
create
shock,
fire,
or
other
hazards.
2.
Before
returning
the
set
to
the
customer,
always
do
an
AC
leakage
current
check
on
the
AC
Outlet
At
5000
Q
per
volt
or
greater
sensitivity,
the
reading
should
not
exceed
0.75
V.
0.15
pF,
150
V
AC
Place
the
probe
on
each
exposed
metalic
part.
exposed
metal
parts
of
the
cabinet,
such
as
terminals,
screw
heads,
and
metal
overlays,
to
be
sure
the
set
is
safe
to
operate
danger
of
electrical
shock.
Plug
the
AC
line
cord
directly
into
a
230
V
AC
outlet.
(Do
not
use
a
line
isolation
transformer
during
this
check.)
Be
sure
your
AC
voltmeter
has
a
sensitivity
of
5000
Q
per
volt
or
greater.
Then
connect
a
1500
2
10
watt
resistor,
paralleled
by
a
0.15
uF
150
V
AC
capacitor,
between
a
known
good
earth
ground
(such
as
a
water
pipe,
or
conduit)
and
the
exposed
metalic
is
parts,
one
at
a
time.
Measure
the
AC
voltage
across
the
combination
of
a
1500
Q
resistor
and
a
0.15
uF
capacitor.
Reverse
the
AC
plug
at
the
AC
outlet
and
repeat
AC
voltage
measurements
for
each
exposed
metalic
part.
Voltage
measured
must
not
exceed
0.75
V
RMS.
This
corresponds
to
0.2
mA
AC.
Any
value
exceeding
this
limit
constitutes
a
potential
shock
hazard
and
must
be
corrected
immediately.
AC
Voltmeter
Good
earth
ground,
such
as
a
water
pipe
or
conduit.
SPECIFICATIONS
FRONT
AMP
SECTION
Condition:
DOLBY
PROLOGIC
off.
No.|
Description
Unit
|
Nominal
Limit
|
|
1
|RMS
Output
Power(mode:
STEREO)
both
channels
driven
at
40
Hz-20
up
freg.,
0.7%
THD,
8
Q
load.
>82
>80
2
|Inter
Modulation
Distortion
(60
Hz:7
du=4:1
SMPTE)
L
at
8
©
load,
80
W
output.
%
<0.05
<0.08
3
|Input
Sensitivity
PHONO!
py
|
2.8
+
0.35
2.8
+
0.4
I
at
1
Miz
freq.,
47
kQ
Impedance.
CD,ETC)
my
|
170
+
20
170
+
30
|
4
|PHONO
Input
Overload
at
1
ki
freq.,
0.5%
THD
nV
>140
>120
5
\Frequency
Response;
at
8
©,
1
W
output,
30
-
15000
Hz
---------------
>
PHONO!
gp
|
RIAA
+1.0
RIAA
+1.5
|
ats
©,
80
W
output,
-3
aB-
------------------->CD,
TAPE)
Hz
|
10-60000
20-50000
|
6
[Signal
to
Noise
Ratio
IHF"A"
weighted
PHONO,
gp
=70°
|
>66
at
8
©,
1
kz,
80
W
output
CD,
AUX;
@B
>90
>
85
7
|Tone
Control
at
8 Q,
1
W
output
BASS:
100
Hz}
«GB
10+1.8
+1042
|
TREBLE:
10
kh]
oB
10+1.8
+1042
8
[Channel
Separation
at
8
Q,
80
W
output
100
Hz!
oB
>50
j
>40
Input
shorted,
CD,
TAPE
1}
oB
>50
>40
oe
10k
B
|
>45
>35
9
{Crosstalk
at
8
O,
1
kd
freq.,
80
W
output
CD=>TAPE1|
gB
>65
>50
|
Input
shorted
TAPE=CD,|
oB
>60
>50
10
|Sub
woofer
output
at
CD,
1
kh,
170
ny
input
|
nV
900+100
|
900+150
|
11
[Headphone
output
at
1
kz,
1
W
Speaker
output
33
Q
Load]
my
|
200430
200
+
50
10
|
Total
Harmonic
Distortion
40
fz)
%
<0.05
<0.2
at
8
Q
load,
80
W
output
1kk|
%
<0.05
<0.2
20k)
%
|
<0.2
<0.3
REAR
AMP
SECTION
Condition
input:
CD,
Input
level:
1
Kaz
freq.
230
nv,
Rear
level:
Max.,
Mastar
Volume:
adj.
No.|Description
Unit
|
Nominal
Limit
1
|RMS
Output
Power(1
CH.
driven
80
W)
|
at
1
iz
freq.,
8
Q
load
|
%
|
<0.8
<1
|
2
|Frequency
Response
>80-
7000)
+100
-
7000
at
1
W
output,
+3
dB,
WIDE
MODE
|
Hz
(+
500)
(+1000)
3
|Signal
to
Noise
Ratio(IHF"A”"
weighted)
Delay
time:
20
ms
DOLBY|
dB
|
265
>60
|
CENTER
AMP
SECTION
Condition
Input:
CD,
Input
level:
1
Wz
freq.
220
ny,
Center
level:
Max.,
Mastar
Volume:
adj.
No.|/Description
Unit
|
Nominal
|
Limit
|
1
‘RMS
Output
Power(1
CH.
driven
80
W)
aes
|
at
1
kHz
freq.,
8
©
load
|
%
<0.2
|
<0.4
2
|Frequency
Response
|
at
1
W
output,
-3
qB,
DOLBY
NORMAL}
Hz
|100-17000)
150-15000
|
|
WIDE}
Hz
|
30-
17000
50-15000
|
|
3
[Signal
to
Noise
Ratio
(IHF"A"
weighted)
NORMAL)
4B
>78
>70
|
VIDEO
SECTION
(No.
Description
|
Unit
|
Nominal
Limit
|
1
[Input
Sensitivity/impedance
|
dB
|1Vp-p/75
O
+0.5
L
2
|Output
Level/impedance
[
gB
1
Vp-p/75
9
+0.5'
|
3
|Frequency
Response
5
Hz
-6
M|
4B
+2
+3
4
|Crosstalk
1.0
Wm
dB
>45
|
>40
[
5
{Signal
to
Noise
Ratio
|B
345
>40
FM
SECTION
Antenna
Impedance:
75
QO
AM
SECTION
No./Description
Tuning
Frequency
Range,
Step:
9
kz
Usable
Sensitivity
Signal
to
Noise
Ratio
>|
Cy
Fy)
Go}
PO]
Unit
Kz
/m
dB
%
No.|/Description
Unit
|
Nominal
Limit
1
[Tuning
Frequency
Range,
Step:
50
kt
Miz
87.5
-
108.0
2
|Usable
Sensitivity
df
<17.2
<20.7
3
|-46
gB
Quieting
Sensitivity
MONO]
iW
<3
<5
STEREO
<35.8
<56.2
4
|Signal
to
Noise
Ratio
(IHF"A"
weighted)
MONO!
«B
>70 >65
=-
STEREO}
aB
>65 >60
5
|Total
Harmonic
Distortion
at
1
kd
freq.
MONO!}
%
<0.30
<0.50
STEREO|
%
<0.60
<0.90
6
/Frequency
Response
at
20
Hz-15
kh
dB
>4+2
>+3
7
|Image
Rejection
dB
>40
>35
8
|Spurious
Response
dB
>70
>60
9
|IF
Rejection
|
dB
>65
>60
10
|Alternative
Channel
Selectivity
dB
>
50
>40
11/AM
Suppression
Ratio
dB
>60
>50
12
|Stereo
Separation
100
Hz;
B
>40
>35
1k!
«B
>45
>40
10
Wz}
GB
>35
>30
13
|Auto
Stop
Error
MONO
|
apf
28+5
28+6
14
|Muting
Threshold
dbf
2845
28+6
15
|Output
Voltage
MONO)
nv
500
+
80
500
+
150
16
|RDS
Sense
@TA
ON
Level
28.1
35.8
Nominal
522
-
1611
<500
>45
<1.0
|
1
|
Tuning
Frequency
Range,
olep.
9
kip
CNS
|
2
|Usable
Sensitivity
SO
SON
Total
Harmonic
Distortion
Selectivity
i
dB
>25
>20
Image
Rejection
dB
>33
>28
<800
>
40
<i5
7
|Frequency
Response
at
400
yz
freq.
0
dB,
-6
aB
Hz
80
-
2100
100
-
1800
9
|Auto
Stop
Level
dB/m
60+5
60+6
11
|Output
Voltage
400
Hz,
30%
MOD.,
@1000
rz!
nv
200+
40
200+50
=|
General
Speaker
Load
Impedance
-
-
- -
-
-
--
-------------------
5-2
r
rrr
rrr
rrr
rrr
r
rrr
8Q
Power
Consumption
-
-
-
-
-
--
-------------------------------------------------
640
W
Dimensions
(WxHxD)
--------------------------------
2-2-0025
-
ree
(17-5/16X5-1/2X13
inch)
Weight
(Net)
-----------------------------------------------------------
Power
Supplies
-
-
---------------------------
7-2-5
-rr
rrr
crc
errr
cre
Specifications
and
components
subject
to
change
without
notic
Overall
performance
will
be
maintained
or
improved.
440X140X330
mm
9.85
kg
(21.72
Ibs)
230
V
AC,
50
Hz
AC
INPUT
POWER
TRANS
OOD00000
000
eee
TRANS
B’D
4001001430
CN1i04
(PCB7)
PWA
SW
B’D
4001001440
SPK
A.B
HEADPHONE
8’
D
400
10041630
(PCB10)
CN10S
WIRING
DIAGRAM
(PCB11)
(PCB2)
PRE-IN
OUT
B’D
400
1001650
yv
is
SURROUND
SPK
&
VIDEO
B’D
4001002910
CN205
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B’'D
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on
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FRONT
8°D
(PCB3)
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°
°
=
°
(°]
v
CNe1i
CN212
CNe1i3
QP
6P
4001001420
SURRE&
VOL
B’
D
(PCB4)
alc
A
S
oO
Al
(PCBS)
i
CP2i7
SP
TAPE2
B’'D
4001004620
TUNER&
ROS
B’
D
Model
No.
:
RV-5050RDS
CN216
4001001610
(PCBS)
cP2i3
CP221
4001001410
ANT
n
x
AM
rs
|
TUNER
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tapee
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(1C¢101/102)
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REAR
4
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DB
ver:
[
fe]
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REAR
MONITOR
Out
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DIAGRAM
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SIGNAL
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3
DATA
CLK
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STEREO
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MUTE
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ADAPTIVE
MATAIX
NUM
2177A
[(IC501)
DIGITAL
DELAY
NUU
9701
(IcSO3)
FL
CPU
(ic505)
SHIFT
REGISTER
MC
14094
INPUT
PaRT
SLRROUND
PART
TUNER
PART
MAIN
PART
POWER
PART
Se
BALANCE
O
|
vou.
Bae=sue:
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Tcosess
N
Model
No.
:
RV-5050RDS
RESOR
KEY
—NATOR
MATRIX
DIG:
DISPLAY
LINK
O
RMC
SENSOR
|
<L~
(|
commences
|
Y
RELAY
PEs
;
CP
ij
niezon
-27v
'
\
REGULAT
ae
FL
ac
3.5v
4
ST-BY
RELAY
+12v
<
REGULATOR
-12V
12v
-iev
+
BV
Sv
FRONT
AMP.
2
AMP
CENTER
AMP,
<A
POWER
REAR
amp.
SUPPLY
REGULATOR
Sv
POWER
Sw
ac
INPUT
OC
R
WOOFER
OuT
L
HEAO
PROTECT
PHONE
A
©
STEREO
MODE
GOW
X
2
SURA
MODE
SOW
x
2
MUTE
CH
MUTE
B
CENTER
PRE-OuT
+
DISCRETE
CENTER
AMP
CENTER
SOW
PROTECT
REAR
25wx2e
DISCRETE
RESAR
AMP
CIRCUIT
DESCRIPTION
1C201
:
uPD78044AGF-152
(8bit
CMOS
Microprocessor)
1.
Pin
Configuration
GRID
KEY-OUT
Sit
G7
$12
G8
$13
$14
G10
$15
G11
(6)
S16
G12
7)
ViD4
Voo
(8)
vib2
CLK-7073
(9)
RDS
MODE
DATA-7073
(10)
VOL
DOWN
CH
MODE
@)
uPD78044GF-152
VOL
uP
aes
(2)
T
MUTE
ST-9216
413)
Voo
CLOCK
(14)
=~
viD3
DATA
@9)
ST-4094
ST-7821
-———(6)
ST-BY
LED
RESET
(7)
Vss
$T-9701
48
RMC
Sis2299
a9)
DB
LINK
AVss
20
PWR
DOWN
STEREO
@1)
DATA
7073
VIDS
22)
KC/TOO
VID4
3)
KuUTO1
RDS
IN
(24)
K2/TO2
25{26)27)-+28)-29)-B0)-3
1)-
82-33-34)
85)-38)-G7)-38)-39)
40)
Pied
Beene
Rae
We
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ddd
he
deal
x=
—
to.
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See
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See
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Be
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fee
eS
ee
Oe
KEY-IN
i
on
Ss
=
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:
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8
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2.
Pin
Functions
Pin
No.
|
Symbol
Description
RE
Logic
|
1-7
GRID
6-12
|
Grid
signal
output
for
FIP.
ae
;
8
VDD
+5
V
power
supply.
9
CLK-7073
=|
Clock
port
of
LC7073.
10
DATA-7073
Data
port
of
LC7073.
11
CH-MODE
Control
port
for
Dolby
Pro-Logic
Channel.
H
12
ST-BY
When
the
power
is
on,
control
data
output
is
"H".
|
When
the
power
is
off,
control
data
output
is
"L"
|
and
last
memory
is
actived.
13
ST-9216
Strobe
port
of
TC-9216.
14
CLOCK
|
Clock
output.
=a
15..|.
DATA
|
Data
output.
16
|
ST-7821
Strobe
port
of
LC-7821.
17
RESET
|
Input
for
resetting
CPU.
18
ST-9701
Strobe
port
of
NJU-9701.
|
t
—{__—-
——4
19
ST-9299
|
Strobe
port
of
TC-9299A.
20
|
AVss
Ground
21
STEREO
Input
for
detecting
FM
STEREO.
H/M/L
22!
VID5
|
Control
port
of
VCR2
front
and
rear.
23-554
VID4
Control
port
of
VCD.
|
24
RDS
IN
Strobe
port
of
TDA-7330B
RDS
input.
L
25
|
PROTECTION
|
Signal
input
for
protection.
26
COC;
TUNED
Input
for
detecting
the
station
during
tuning.
L
27
|
STEP
According
to
the
region,
input
for
selecting
the
frequency
bands
and
steps
of
FM
and
AM.
Settings
are
as
follows.
REGION|
FREQUENCE
|
STEP
|
PIN
27
|
|
|
AMERICA|FM:
87.5
-
107.9
MHz}
200
KHz)
5V
|
|
AM:
520-1710
KHz
|
10
KHz
|
|
EUROPE
|FM:
87.5-108MHz
|
50KHz|
2.5
V
L
i
522-1611
KHz
|
9
KHz|
|
KOREA
|FM:
87.5
-
107.5
MHz)
200
KHz}
OV
|
|AM:
522-1611
KHz
|
9
KHz
28
|SIGNAL
METER’
Input
port
of
FM
Signal.
H/L
i
29
AVaag
|
Power
supply
of
Analog
A/D
Converter.
“a
|
30
AViet
|
Ref.
Voltage
of
Analog
A/D
Converter.
L
31
GND
Ground.
|
32
N.C
|
Not
used
!
a
Vss___
Ground.
34
X-TAL
IN
Input
for
crystal
oscillator.
|
35
X-TAL
OUT
|
Output
for
crystal
oscillator.
z
36
C.MUTE
'
Control
port
for
Center
Signal
mute.
H/L
37
S.MUTE
Control
port
for
Surround
Signai
mute.
H/L
38
T/M
MUTE
Control
port
for
Tape
Monitor
Signal
mute.
39
M.MUTE
Control
port
for
Main
Signal
mute.
H
10
;
Active
Pin
No.
|
D
ipti
|
No
|
Symbol
escription
|
Logic
oT
:
40
-
43
K3
-
KO
Data
input
for
key
scan.
H
DATA
-
7073
Data
start
of
LC-7073.
45
PWR-DOWN
Input
for
detecting
power
down.
L
D-LINK
Input/Output
for
controlling
DIGI-LINK.
47
RMC
input
for
remote
control
data.
aay
Vss
Ground.
ST-BY
LED
Output
for
driving
stand-by
LED.
H
50
ST-4094
Strobe
port
of
M-14094.
H
51
52
[Vn
|
*5V
power
supply.
53
Output
to
drive
volume
motor
for
increasing
volume
level.
VOL.DOWN
|
Output
to
drive
volume
motor
for
decreasing
volume
level.
56
RDS
MODE
Control
port
for
RDS
mode.
mB
Ij
x
57
VID2
Control
port
for
VCR2
hie.
58
viD1
Control
port
for
VCR1.
59
-
70
SEG
16-5
Segment
signal
output
for
FIP.
71
Vioad
-30
V
power
supply
for
FIP.
SEG
4-1
Segment
signal
output
for
FIP.
76
-
80
GRID
1-5
Grid
signal
output
for
FIP.
fe
3.
Block
Diagram
TOO/PI0
O=—]
isbnTIMEN
[A
TO1/P31
O
8
ba
TIMER/
==
Ti1/P33
0
EVENT
COUNTER
|
K
>
POO-PO4
TO2/P32
T12/P34
Bbit
TIMERS
K—
sence
[ef
vom
/
WATCHDOG
TIMER
K
—_
>
“WATCH
TIMER
[rome
F>
mm
CIO/INTP3/PO3
oe
Een
ae
f
COUNTER
coms
om
aa
el
2
em
E>
vom
eee
intenraceo
K—Y
PORTIO
[-_
>
P100-P107
SCKO/P27
s1/P20
©
s01/P21
©
BeRL/P22
owe]
SERIAL
YA)
|
|
puzzer
[SOCK
|
crock
|
cock
cavmaror
|
sranp
By
INTERFACE
1
OUTPUT
stB/P23
©
OUTPUT
DIVIDER
|
sus
|
CONTROL
BUSY/P24
©
CONTROI.
Ko
PorTID.
«KC
pino-P17
O
O
AYa,
O
ANIO/P10.
a,
a
BUZ/P36
PCL/P35
PO4/XT1L
XT2
AVps
O-—~-|A/D
CONVERTERK
—_
;
ate
Cy
rome
kD
P120-P127
oe
°
|
i
|
|
INTPO/TIO/POO
INTERRUPT
FIPO-FIP33
Lath
|
conmo.
K—~
FE
Mae
Se
vi
~INTP3/Cl0/PO3
O
Vreso
11
4.
Key
Matrix
OUT|
KSCANO!|
KSCAN1
|
KSCAN2/
KSCAN3/
KSCAN4|
KSCANS5
|
KSCAN6
|
KSCAN7
IN
PIN
61
PIN
62
PIN63
|
PING4
|
PINGS
|
PIN66
|
PIN67
|
PIN68
[
eS
PUN
KEY
INO
|
DISPLAY
AM
TAPE
1
|
TAPE
2
CD
4
VCR2
>
VCR1
PIN
43
|
{DCC
|
MON.
|
Fora
ec
ae
eal
rr
ONO
FM
4
2
DIRECT
A
Sia
|
(RDS
PH
|
v
SS
STE
USE
SERRE
RE
eee
eee
KEYIN2|)
AF
CENTER
5
9
3
6
PIN
41
MODE
|
KEYIN3|
DTY
|
SURROUND
o
|
8 7
MEMORY
|
AUTO
FM
PIN
40
MODE
|
/IMANU
|
MODE
le
5.
Digital
Tuning
System
Description
<QquE
FV
PLL
Loop
<7]
AM
PLL
Loop
FM
ANT
___FM
FRONT
END
PACK
r
—
vee
eens
Ge
ome
ee
om ee
ee
ag
FM
RF
FM
MIX
FM
OSC
|
Keay
I
Low
Pass
Filter
Q902,
Q903
ai
PLL
Prescaler
FE
901
FM
IN
1C901
AM
IN
CCT
Sr
we
Se
we
=
AM
ANT
Data
CPU
1C201
AM
OSC
Key
FL
;
[Butler
|
!
Display
Switch
Matrix
!
I
I
|
!
|
1
i
|
1
I
1
|
!
i
i
L
12