Sherwood RVD-6090R User manual

RVD-6090R/RDS
AUDIO/VIDEO RECEIVER
@Sherwood AUDIO/ VIDEO RECEWER Rvb-6090R digiliok
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SPECIFICATIONS
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MECHANICAL
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| 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
rated for higher voltage, wattage, etc.
Replacement parts that have these-special
safety characteristics are identified in this
manual and its supplements: electrical
components having such features are
identified by /\ 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.
. Before returning the set to the customer,
always do an AC leakage current check on the
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 120 V AC outlet(USA Version) or 230 V
AC outlet(EU Version). (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 Q 10 watt resistor, paralleled by a 0.15 pF
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 pF
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. :
At 5000 Q per volt or greater sensitivity,
the reading should not exceed 0.75 V.
AC Outlet
AC Voltmeter
Good earth ground, such as
a water pipe or conduit
1500 Q
10 Watt
0.15 pF 150 VAC.
Place the probe on each exposed metalic part.

SPECIFICATIONS
Measuring methods are based on IHF and IEC standard 268-3
Measurements conditions,unless otherwise noted :
Output resistive load = (8) ohms / Both channel driven
Tone(Bass, Treble), Balance, EQ control : Center Position , Other SW's : OFF
Nominal input level : 5mV for MM, 0.5mV for MC, 500mvV for general purpose inputs
Power figures should be kept minimum 10min. between 15 and 35°C
Terminator : 1000hm for MC, 1kohm for MM and general purpose inputs
Filter : IHF-A filter R/O = Rated Output
Power supply A: 120V/60Hz , Di 230V/50Hz
@
FRONT
AMP
SECTION
*
SUB-WOOFER
SPKR:NO
*SPKR
LEVEL:ALL
0dB
* SOURCE
DIRECT
ON
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2 | CHANNEL BALANCE ikHz | R/IOTO-40dB | dB [ +3 [| +2 |
ae ikHz oe ae ee
| 3 | DAMPING FACTOR tkHz
4 | RESIDUAL NOISE 1kHz
1kHz
TOTAL HARMONIC DISTORTION H
CD(500mV) 1kH
CONTINUOUS AVERAGE | co |
(
V/)
VOL min.
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S/N RATIO, IHF-A FILTER CD(500mV) Oe Ee ee
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GHANNEL SEPARATION "oom | Rios | a8 | 245 | S85 |
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A
[70 FUNGTION CROSSTALK" [eO=TAPE MO] - | a8 [ 000860
ii FREQUENCY RESPONSE (dB) | CD;600mv) |__| ___1W___|Fa-kHz| 20-60 [10-55 _|
12| TONE CONTROL , +(8)dB }100Hz{ WBC aia
"| eee een
1250
14 | PHONO EQUALIZATION PHONO rjoorz | TAPEOUT | eB |S
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15 | HEADPHONE OUTPUT R/O
eee einem ne ee
DIN POWER at 1% THD oC ae

Nol _bescription | inpuT_ [FREQ] REMARK | UNIT
(a7 [POWERBANDWOTH 2d8 [cD SCdYCCROee]
ee a res eee eel
20 cycle ON,480 cycle OFF cp [ate [ohms Ww
P[siewRaTe —=S=S=~SCSC «dd tke | =O‘ Vises] SCS
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re a ees
cp__|foxe | Vol max [dB | -s5t15] -35%1 |
[2a [DC OFFSET VOLTAGE [cb |_| VOtmin. [mv
@ REAR AMP SECTION Measurements conditions : Input level (350)Mv
Rear level max., Master volume adj.Delay time 20ms
INPUT |FREQ.| REMARK | UNIT | LIMITL/R piel
@enns |W 255
| 2 | TOTAL HARMONIC DISTORTION <0.7
a
1W
aa eee eee
ake |__| 00-87
es
@ CENTER AMP SECTION Measurements conditions : Input level (350)mV SPKR : LARGE.
Center level max., Master volume adj.
|No| DESCRIPTION INPUT | FREQ.| REMARK UNIT | LIMIT | NOMINAL
| 1. | POWER OUTPUT at 0.3% THD (8)ohms >55
4 | FRE RES(ONLY DOLBY) +3dB
5 | DC OFFSET VOLTAGE
:
[Rio [ae [255 [200 |
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CD
Cc
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DOLBY MODE SMALL C a
REMARK UNIT LIMIT NOMINAL
FREQUENCY RESPONSE .
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No DESCRIPTION CONTENTS-TEST TONE | CHAP |
DIALOG [DIALOG NOMALIZATION = 1KHz -20dBFS L/C/R/LS/RS
CE Ee
30Hz -20dBFS LFE
OUTPUT CONFIGURATION TEST ee estar
s[a[ wr [a
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ourPuTconmcunarow' is [er ome oars omer] S| STV
Smertowanaron iat [anervonsnare | = [el =[s[o
OUTPUT CONFIGURATION1 TEST REF : 1KHz OdBFS L/C/RILS/RS se(REF)| S| S| S| Y|
OUTPUT CONFIGURATION1 TEST 30Hz OdBES L/C/R/LS/RS L 20. bs | ststy |
ce
| OUTPUT CONFIGURATION2 TEST JsoHzodBFSLFE | th TL] Ss] S| NN]
fouTrUTCoMFGuRATIONZ TEST [REF iteowrsuoraaR omer t | S[s[W
fourPuTconrGuRATiON: TES [reonorsuomasnsure |= [u[s[s[w
DoweimnGTest | REF eae oarse> cenren wf owER] c | S[ 8]
Domemncrest —___—_—_—+dReF vere mrss 1s. no [amen | S[ 8]
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UNIT
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Loss HE : 30Hz -3dBFS oo
DOWNMIXING TEST / USING VER 2.0 2 7(REF) Ss S
ST ON -> SW: MO
a | UNIT |

TUNER SECTION
Measuring methods in confirmity with IEC standard 315
Measurements condition FM : Radio frequency = 98.1MHz, Audio frequency = 1kHz
Reference level = imV on ( 75ohms , 300ohms )
Deviation : MONO = +75kHz, Stereo = +67.5kHz+7.5kHz
MONO = + 40kHz, Stereo = +40kHz+7.5kHz
Test Point: TP 1 = 90.1MHz, TP 2 = 98.1MHz, TP 3 = 106.1MHz Filter = B.P.F at STEREO
@ FM SECTION Power supply : 120V ,60Hz
[NO DESCRIPTION UNIT | LIMIT L/R | NOMINAL L/R
1 | TUNING RANGE LOW~HIGH | MHz 87.5~108
STEP (A) AUTO/Man. kHz
STEP (D/RDS) AUTO/Man. kHz
2 | USABLE SENSITIVITY TP 1 dBf
SIN = 30dB (A) TP 2
S/N = 26dB (D/RDS) TP 3
3 | FULL LIMITING SENSE (A) OUTPUT =-3dB | dBf <15.2 <12.2
SNe Noms | oumreoe | | ae | ona |
Pa{auTostopiever——dTSSSSC*~*~‘C |e SSYSCSC TC
5 | AUTO SCAN ERROR (A) kHz
feeSNoms |
S/N RATIO MONO
fe IHF-A FILTER ee ed eee
7 | TOTAL HARMONIC DISTORTION MONO %
Tee NEN | stereo |” [ae
50dB QUIETING SENS. (A) MONO dBf S272
46dB QUIETING SENS. (D/RDS) STEREO <48.3
. CHANNEL SEPARATION (A) = 35
lage
=
230
ig
332
10)
=
CHANNEL SEPARATION (D/RDS)
A
oO fo)
S07
10| FREQUENCY RESPONSE AT +1.5dB 20~12.5K
11| SPURIOUS RESPONSE (A)
if (DIRDS) ie ee cee ee
IF REJECTION | Pt | eB | eo | 80
13] IMAGE REJECTION (A) TP 3
a oro | |S FS
[a[AMREJECTIONRATIO(A) | ——=S=Ss—S~=~d—SB SYS? |S
FS[RFINTERMODULATION, [| SSCs |S
Fig[CAPTURERATIO. [SS SSCSC~idS | CSC~S
17| ALTERNATIVE CH SELECTIVITY (A) +400kHz ae Cie
Ros) sone | - | sa] sa
[19] RDS SENSITIVITY (DRDS)_—<|——SSSS~*dC

@ AM SECTION
Measuring methods in confirmity with IEC standard 315
Measurements condition AM - MW: Radio frequency = 1000/999kHz, Audio frequency = 400Hz
LW : Radio frequency = 207kHz, Audio frequency = 400Hz
Reference level = 5mV/m,10mV/m on 500hms Modulation = 30%
Test Point: MW TP1=(600)kHz TP2=(1000)kHz TP3 = (1400)kHz
LW TP1= 162kHz, TP2= 207kHz, TP3=252kHz
DESCRIPTION UNIT | LIMIT L/R | NOMINAL L/R
1 | TUNING COVER RANGE (A) LOW ~ HIGH MW | kHz
fee eee
STEP (A) AUTO/Man. kH
(OIRDS) ieceeeae d erece eer
N
2 | USABLE SENSITIVITY MW TP 1 uvim
SIN = 2048 TP
TP2 nein aes
a=
5 [SINRATIO vw
fi SE ee ee eee
4 | TOTAL HARMONIC DISTORTION (A). %
é (O/RDS) ee mesic eee
OVER LOAD DISTORTION 5mV 80% MOD
FREQUENCY RESPONSE at -6dB MW Hz
hy Maecenlicneieioad AN “MIE Bak cose secre
7 | SELECTIVITY 10kHz/9kHz MW
es | iw | *
AGC FIGURE OF MERIT _Input=100mV,-10dB
IMAGE REJECTION (A)
(DIRS)
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10| WHISTLE MODULATION 2IF
11] AUTO STOP LEVEL Mw
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CIRCUIT DESCRIPTION
CXP82852 - 1520 : 1C301
1. Pin Description
G10
FIP GRID
chal C1)
-— G12 (2)
Vop (3)
P.DOW (4)
VOL.UP (5)
RDS CLK (6)
VOL.DOW (7)
RMC (8)
RDS DATA (9)
NC (40)
NC (11)
REAR.MUTE
SUB.MUTE
SET OPTION=—>@)
GND
CENTER.MUTE
STEP OPTION -—~@)
TUNER.MUTE
FRONT.MUTE
12
SEGMENT
S6
$7
$8
$9
$10
S11
S12
$13
$14
$15
$16
STBY LED/RELAY
DIRECT LED
DOLBY DIGITAL LED
OPTICAL LED
COAXIAL LED
SUB W.SWITCH
NC
CINEMA EQ LED
DYNAMIC RANGE LED
NC
NC
NC
NC
NC
NC
NC
SPK RELAY
VIDEO S2
VIDEO $3

2. Block Diagram
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3. CPU Pin Function
2
12G Grid signal output for FIP.
D +5V power supply.
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2
NC
NC Not Used!
PROTECT Input for detecting "Protection" condition.
STEREO Input for detecting "Stereo" condition.
7001CE Chip enable signal output to LM7001.
| 15 | 9273CLK Clock signal output for TC9273
17~
14
15 :
|
|
1 |.
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5
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10
A QO
22
23
24
SPK OFF input for detecting "Speaker Switch is Off’ condition.
TUNED Input for detecting "Tuned" condition. (At "L" it is active.)
:
STEP OPTION According to region, input for selecting the frequency
bands and steps and FM and AM. .
14
KEY IN1~3 Data input for key scan
9273CE Chip enable signal output to TC9273
nN oa
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nN
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- 28
29
30
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35

36
37
38
39
40
41
42
43
Symbo
SET OPTION Input for selecting set. (5V: RDS Receiver, OV: Receiver)
VSS(GND) This pin provides the ground potential.
RESET Input for reseting the CPU. (At "L" it is active.)
vest
T.MUTE Output for tuner mute. (At "L" it is active.)
F.MUTE Output for front channel mute. (At "L" it is active.)
S.MUTE Output for surround channel mute. (At "L",it is active.)
W.MUTE Output for subwoofer mute. (At "L" it is active.)
C.MUTE Output for center channel! mute. (At "L" it is active.)
|
aN iN < 0 7]
z
QO
45
46
47
48
49
50
51
52
53
54~60
61
62
VIDEO 83
SPK RELAY
NO
CINEMA EQ LED Output to drive CINEMA EQ. (At '"H" it is active.)
SUB.W Output to drive subwoofer. (At "L." it is active.).
LED-COAXIAL Output to drive COAXIAL LED. (At '"H" it is active.)
LED-DIRECT Output to drive DIRECT LED. (At "H" it is active.)
fon) o z O
64
65
67
z QO
91~100| 1G~10G
15

4. Key Matrix Table
KEY IN3
PIN 17
BECANO CINEMA EQ
PIN 70
KEY IN2
PIN 18
KEY IN1
PIN 19
DYNAMIC RANGE
KSCAN1 TONE DIGITAL 6CH
PIN 71 DIRECT INPUT DIRECT
KSCAN2 SPEAKER DOLBY ~ DSP MODE
PIN 72 -MODE
KSCAN3 FM i TA PTY
PIN 73 MODE
perio SEARCH DISPLAY PTY SEL
PIN 74
KSCAN5 BASS BASS TREBLE
PIN 75 (Vv) (A) (Vv)
KSCAN6 TREBLE CH LEVEL CH LEVEL
PIN 76 (A) (v)
)
(a)
KSCAN7 TAPE
PIN 77 MON.
KSCANB8 CH SEL ane aes
PIN 78
KSCANQ TUN/PRE TUN/PRE as ee
PIN 79 (v) (~A
KSCAN10 KOE STEREO TIP
PIN 80 MODE MODE
16

ALIGNMENT PROCEDURES |
TUNER
1. Equipment Required
»
AM
Standard
Signal
Generator
(AM
SSG)
.
©
Audio
Generator
«
Oscilloscope
«
Distortion
Meter
«
AC
Voltmeter
«
DC
Voltmeter
+
FM
Standard
Signal
Generator
(FM
SSG)
¢
Frequency
Counter
.* Stereo Modulator
Note : Disconnect external FM antenna prior to alignment.
2. Non RDS Version Alignment
2-1. Alignment and Test Point
ie 0090002008 e
at oe
> Te
: ten oad ONT
2-2. AM Alignment
-
Output
of
signal
generator
should
not
be
greater
than
necessary
to
obtain
an
optimum
output
reading.
-
Signal
generator
modulation
:
30
%
> RF signal frequency : 400 Hz
- Switch : Press the BAND button to AM
Signal
Set
Equipment
Adjustment
Step | Subject Frequency Connection Point
Frequenc Setting. :
Generator
1
|Tuning
520
kHz
520
kHz
DC
Volt
meter
T3
)
DC
1+0.2V
Voltage
522
kHz
522
kHz
to
J14
AM
OSC(R
2
IRF
600
kHz
AC
voltmeter
and
T1
Maximize
Tuning
(603
kHz)
ie
oscilloscope to tape’
monitor output L/R
*
Feed
signal
should
be
fed
to
loop
antenna
through
the
test
loop
antenna
60
cm
distant
from
the appliance.
T5
AMIFT-
MW ANT(W) audio output
AC voltmeter.and
oscilloscope to tape
monitor output L/R
Symmetrical
curve on AM
IF signal generator

2-3. FM Alignment
- Output of signal generator should not be greater than necessary to obtain an optimum output reading.
* RF signal frequency : 1 kHz
- Signal generator deviation : 75 kHz é ;
- Switch : Press the BAND button to FM
, Signal Set j Equipment Adjustment
Step | Subject Generator Frequency Génnachan 7 Point Adjust for
Frequenc Setting
1 |THD 98.1 MHz 98.1 MHz _ | Distortion meter and |T6 Minimize
(Mono) (98.0 MHz) (98.0 MHz) oscilloscope to tape |FM-DET distortion
1000 Wim monitor output L/R
3. RDS Version Alignment
3-1. Alignment and Test Point
io
S30BN'
“26 AGED
.
[INJECTOR [ADy
3-2. AM Alignment
- Output of signal generator should not be greater than necessary to obtain an optimum output reading.
- Signal generator modulation : 30 %
- RF signal frequency : 400 Hz
- Switch : Press the BAND button to AM
Signal Set Equipment Adjustment
Step | Subject Generator Frequency Connection Point Adjust for
Frequenc Setting
1 }Tuning 522kHz 522kHz 1) DC Volt meter T2 DC1.2V+0.2V
Voltage to J22 (TP1) AM OSC(R)
2 |RF 594 kHz AC voltmeter and
(| ee oscilloscope to MW ANT(W. Maximize
1404 kHz 1404 kHz 2) tape monitor TcC1 ~C audio output
output L/R
* Feed signal should be fed to loop antenna through the test loop antenna 60 cm distant from
the appliance.
* Repeat the step 1) and 2)-until no further improvement occurs.
18

: soe a cn Ai
oscilloscope to tape |AM IFT curve on AM
monitor output L/R IF qenescope
Tuned’
999kHz
999kHz
~
VR1
"Tuned"
flag
in
Level
800
W/m
the
FL
display
light
on
3-4. FM Alignment
-
Output
of
signal
generator
should
not
be
greater
than
necessary
to
obtain
an
optimum
output
reading.
-
Signal
generator
deviation : 40
kHz
> RF signal frequency : 1 kHz
- Switch : Press the BAND button to FM and the FM MODE button to MONO
Sigiial
Set
Equipment
Adjustment
Step
|
Subject
Generator
Frequency
Gannection
Point
Adjust
for
Frequenc
Setting
Band
Widt
to
R26(PCB1)
DC
Volt
meter
; oscilloscope to tape distortion
monitor output L/R
3.
|Tuned
98.0
MHz
98.0
MHz
VR2
'
{"Tuned"
flag
in
SSG output level :
10 W/m
the FL display
light on
3-5. MPX Alignment
Signal generator frequency : 98 MHz
Signal generator deviation : 40 kHz
- RF signal frequency : 1 kHz
- Signal generator output level : 1000 ~V/m
- Connect signal generator to FM antenna terminal through FM dummy antenna (75 )
- Switch : Press the BAND button to FM and the FM MODE button to STEREO
: Ag ie Signel Equipment Adjustment
Step | Subject Modulation Generator Connection Point Adjust for
Level Setting
1 |Separation |8 % Modulation i AC voltmeter and VR Set AC voltmeter
oscilloscope to tape to 0 dB
monitor output L/R
4
AC voltmeter and AC voltmeter
oscilloscope to tape reading should be
monitor output L/R at least 20 dB below
3
Pilot on AC voltmeter and VR3 Set AC voltmeter
oscilloscope to tape to 0 dB
monitor output L/R
Separation |8 % Modulation
AC voltmeter and AC voltmeter
oscilloscope to tape reading should be
monitor output L/R at least 20 dB below
if you could not obtain -20 dB readings in steps 1 and 2, readjust VR3 until you abtain -20 dB readings for
both steps 3 and 4. Norminal is -25 dB.
19

4. Equipment Connection
4-1. AM Alignment Connection
2" (60 cm)
| TAPE OUT
JACK
Tuner
Front-End
(FE1)
* RDS VERSION : IC2
4-2. FM Dummy Antenna
125 82 (112.5 Q)
O
Zin=752 ©) Zout = 3002
150 Q
FM
Dummy
Antenna
to
3002
Antenna
terminal
of
system.
4-3. FM RF/IF and MPX Alignment Connection
*DC
Voltmeter
FM Antenna Set
Terminal
(3009)
A
te
PN
te
ee
eT
TAPE
OUT
| JACK
Tuner
Front-End
FM Dummy
Antenna
75Q
Stereo
Modulator
AC
Voltmeter
Distortion
Meter -
20

TROUBLESHOOTING
SYMPTOM CAUSE AND REMEDY
Receiver inoperative A) Poor AC power cord.
{ FL indicator does not light.) B) Defective the power switch.
Replace.
C) Broken wire in the power transformer.
Replace.
D) Blown fuse
Replace the fuse.
Fuse blows when power is turned on a Defective power transformer.
Replace.
| B) Short on the primary or secondary of the transformer
circuitry.
Repair the short.
iC) Damaged rectifier 0102~D105,D121~D124,and D116
| or damaged transistor Q213L/R/C/SL/SR.
O214L/R/C/SL/SR.
| D) Short circuit in the amplifier circuit.
4
Repair the shorted component(s) in the amplifier circuit.
A) Defective in transistor Q213L/R,Q214L/R the AMP B'D
A) Defective in transistor Q213L/R/C/SL/SR or
volume is at maximum with a test ! Q214L/R/C/SL/SR on the AMP B'D.
Power indicator lights but no sound
from both channels
One channel does not work when
signal applied to the center terminal Replace the defective.
of volume control of the dead channel. | B) Break in copper foil of printed circuit board.
Repair the defect.
C) Short in speaker output terminal.
Repair or replace.
Speaker works normally but head- A) Headphone plug does not match with jack.
phones inoperative. Replace the jack.
B) Defective resistor R703,704.
Replace.
FM volume is insufficient. A) If volume from both L and R channels is not loud enough:
Front-end section defective.
faulty IC2,Coil T4,T5.
If sound of one channel is not loud enough:Defective VR3.
21.