Sherwood RD-6106/G/RDS User manual

SERVICE
MANUAL
RD-6106/G/RDS
DOLBY
DIGITAL
AC-3/DTS
READY
RECEIVER
SERERRER te
bts ORAL Eohve Lee
= CONTENTS «
SPECIFICATIONS
.......csescsesteseessecseesetsneeseereettnees
2
MECHANICAL
PARTS
LIST
.....cceeesssssterseeeses
23
BLOCK
DIAGRAM
.....ccccscsccstessesnsesenennerereeeteenees
9
EXPLODED
VIEW
......csescesseestesereerssreesetserreesees
24
WIRING
DIAGRAM.......ccsccsscsseseesereteeterereeseernans
10
ELECTRICAL
PARTS
LIST........cccscsssesesseetseesers
25
CIRCUIT
DESCRIPTION......ccccsccssssssseererereeeerees
11
PRINTED
CIRCUIT
BOARDS
........cssssseseeseereeees
32
ALIGNMENT
PROCEDUREG...........ccscsscserereeres
16
IC’S
FUNCTIONAL
BLOCK
DIAGRAM
............
37
TROUBLESHOOTING.
.....cceescsseeneecesenteeeeeenes
19
SCHEMATIC
DIAGRAMG.........:ccsessesssereeenerers
43
©
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 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.
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 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.
AC Voltmeter
Good earth ground, such as
a water pipe or.conduct
0.15 uF 150 VAC.

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, 500mV 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 : 120V/60Hz (A), 220V/50Hz (C), 230V/50Hz (D)
@ FRONT AMP SECTION *SUB-WOOFER SPKR: NO *SPKR LEVEL : ALL 0dB
*SOURCE DIRECT ON(TONE DIRECT MODE)
No[_bESGRIPTION | WAT | FREG. | REMARK | UWT [LT UR NOMNALLUR
CN
OS
Paes [fw
|
Te
a
EN
AA
ES
Ps
[DAMPING
FACTOR
__—S—«dT~SCiid|
te
|
Cd]
SP
Cd
Food
« [RESIDUAL NOISE =
aetie | vormax [mv |p
TOTAL HARMONIC DISTORTION (40)Hz
oD (600m) RV
(20)KHz
CONTINUOUS AVERAGE POWER wf 80 | 2
at (02)% THD co (ohms
wp [2
% [sos | s02
Zz
ss [sao [eas |
0 [FUNCTION CROSSTALK | GD=TAPEIN [‘riowne] _R/OSa8 [eB | =e050| =o515_
<0.2
290
255
255
245
12] T TROL, #(8)d 1
ONE CONTROL, #(8)dB ae a
[i | SUBWOOFER OUT (leh put CD or v
| 8 |
[08
Ev
peer [noe Feel or Pet
Le a
15 | HEADPHONE OUTPUT 2.440.4
CD (500mv) 2
DIN POWER at 1 THO eel rama

INPUT
DESCRIPTION
17 | DYNAMIC POWER OUTPUT
20 cycle ON,480 cycle OFF
LIMIT | NOMINAL
vo
j
remarn
|
unit
|
POWER BANDWIDTH -3dB
CD
D
D
Cc
Cc
Ms
9 | SLEW RATE
20 | SLEW-FACTOR cp(soomv) | |
PRE OUTPUT LEVEL GOH (200m) | He | VOLmax | V | _
SUB-CH (200mV) 1.7404 | 1.7203
2 [CINEMAEG at TW co | tere | votmex | a] ‘|
CD(500mV) | 10kHz | VOLmax. | dB | -5.5#1.5 | -5.521
DC OFFSET VOLTAGE CD | | VOL min. 70
21
Ps)
a oOo
@ REAR AMP SECTION
Measurements conditions : Input level 350mV
Rear level max, Delay Time 20ms, Master volume adj
DESCRIPTION INPUT
1 | POWER OUTPUT 0.7% THD Cc
2 | TOTAL HARMONIC DISTORTION Cc
S/N RATIO DOLBY
IHF-A FILTER, THEATER
HALL4
HALL2
} REMARK UNIT | LIMIT L/R NOMINAL
rie [tw | 07 eee
| dB | 255 | 26
cc ae
| |
| |
| kHz | iw
1W
R/O
1kHz 1W 20~7K
pf eee] 120-6 [100-7
[[vormin [mv [70 60
D
cD
LARGE cD
SMALL
D
D
au
Cc
e@ CENTER AMP SECTION
Measurements conditions : Input level 350mV
SPKR : WIDE, Center level max, Master volume adj
NO | DESCRIPTION INPUT | FREQ. | REMARK | UNIT | LIMIT | NOMINAL
POWER OUTPUT at 0.3% THD D (8)ohms > 55
TOTAL HARMONIC DISTORTION cD i % | <03- | <02
S/N RATIO, IHF-A FILTER cD | dB | 255 | =e
CD
eas a
FRE. RESPONSE LARGE ag 35~18K | 30~2IK
DOLBY MODE _ SMALL 135~18K | 120~2K
* Jomema ea CD (500mV) —— =—
D6 OFFSET VOLTAGE vor min [mv | 70 _|
e VIDEO SECTION
er)
io[ ___pesenierion | [rea | REWARK | UN Nomi
Pi fourpurcevet—_—_——~«dYCVORWVpe) | He | 750hm | Vw | 1302 | 100
ea
-5.524
%
mV CD
SINRATIO a a

TUNER SECTION
Measuring methods in confirmity with IEC standard 315
Measurements condition FM : Radio frequency = 98.1MHz, Audio frequency = 1kHz
Reference level = 1mV on ( 75ohms , 300ohms )
Deviation : MONO = +75kHz, Stereo = +67.5kHz+7.5kHz (America)
MONO = +40kHz, Stereo = +40kHz+7.5kHz (Europe)
Test Point : TP 1 = 90.1MHz, TP 2 = 98.1MHz, TP 3 = 106.1MH Filter = B.P.F at STEREO
Power supply : 120V/60Hz (A), 220V/50Hz (C), 230V/50Hz (D/RDS)
@ FM SECTION
| NO | DESCRIPTION
TUNING RANGE LOW ~ HIGH
AUTO/Man.
AUTO/Man.
TP 1
TP 2
UNIT
MHz
kHz
kHz
TP 3 dBf <23.2
STEP (A)
STEP (C/D/RDS)
USABLE SENSITIVITY
S/N = 30dB (A)
S/N = 26dB (C/D/RDS)
Bf
Bf Q.
CHANNEL SEPARATION 100Hz
1kHz
10kHz
10 | FREQUENCY RESPONSE AT +1.3dB Hz
1 | SPURIOUS RESPONSE
2 | IF REJECTION TP 1
3 | IMAGE REJECTION (A) TP 3
(C/D/RDS) TP 3
4 | AM REJECTION RATIO. (A)
(C/D/RDS)
5 | RF INTERMODULATION
16 | CAPTURE RATIO
:
:
:
:
:
w Oo
3 | FULL LIMITING SENSE (A) OUTPUT = -3dB dBf <15.2
Be (C/D/RDS) ouTpuT=-30B | = [ —-<23.2
Ps [auroscavernon——SSSOSCS~C~S~i a |
7 | TOTAL HARMONIC DISTORTION %
ee eer ans
46dB QUIETING SENS. (C/D/RDS) dBf <48.3
| t00Hz
| tke |
| 10kHz |
QW {| ow fo?) N aya or oa
=
=
V
o °

| NO | DESCRIPTION UNIT LIMITU/R | NOMINALUR
OUPUT
LEVEL
MONO
TAPE
REC
OUT
5004150
5004100
@ 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 500ohms Modulation = 30%
Test Point: MW TP1=(600)kHz TP2=(1000)kHz TP3=(1400)kHz — (A)
MW = TP1=(594)kKHz TP2=(999)kHz TP3=(1404)kHz — (C/D/RDS)
LW TP1= 162kHz, TP2= 207kHz, TP3 = 252kHz
UNIT LIMITL/R | NOMINAL L/R
(c/D/RDS) | LOW~HIGH Mw | kHz | 522~1611
DESCRIPTION
TUNING COVER RANGE (A) LOW ~ HIGH MW
1
kHz
kHz
STEP (A) AUTO/Man. kHz
automa [we [8
USABLE SENSITIVITY
S/N = 20dB
3
4
5
FREQUENCY RESPONSE at -6dB
| dB
7 | SELECTIVITY 10kHz/9kHz i a ee
ee ee Se
|B | es
|B
|B |
AGC FIGURE OF MERIT __Input=100mV, -10dB
IMAGE REJECTION MW =TP 3
LW=TP 3
oe orl
0
|
WHISTLE
MODULATION
|
<to
wm
800(+10dB
| TAPE REC OUT |
nN
AUTO STOP LEVEL
TUNED LEVEL 800(+8dB)
wmf
OUTPUT LEVEL (A) TAPE REC OUT 160460 16050
(C/D/RDS) TAPE REC OUT 15060 150+50
=
= — =
w =

a AC-3 SECTION
Measurements conditions, unless otherwise noted.
Input Funtion : LD (other digital player)
Digital Input Mode : LD COAXIAL
Main Vol. Position : 50 position.
Trim Vol. Position : All "0" dB
Test Point : Spk-out & Pre-out
Test Disc : DOLBY TEST DISC VERSION 1.0
Center, Rear Delay : Oms
|
No
|
DESCRIPTION
CONTENTS-TEST
TONE
CHAP
FF
|
c
|
Rr
[sw]
JOUTPUTLEVEL
LEVEL
JOUTPUTLEVEL
|
tH
OdBFS
L/C/RILS/RS
(2
eaBe
OUTPUT
LEVEL
30kHz
OdBFS
LFE
(Pre
Out)
_reheTe
OUTPUT
LEVEL
MAIN
VOL.
:
MIN.
1kHz
OdBFS
L/C/R/LS/RS
mel
ef
fe
[
«eps
pl
ww
OUTPUT
LEVEL
MAIN
VOL.
:
MIN.
30kHz
OdBFS
LFE
(Pre
Out
Exe
RS
|
sw
UNIT
:
a
5 CECT el
Spa eee CCT ee TE
ae
4
om
7
A
tao
[meow
sowie
SY
ev
[cuamnec
seaman
mersweowsest
sparen
fe
|
Tels [eTs[s[o[
ow
[
fowet seraramon er tawowsrsc ————S—S—=sd omen ee Pt |
ferimeosrsa fares Te [eT
x
ia Dette cS rear] wr |e
ES
[aamew
[ee
[Le
]
Ss
ER]
oe]
ow
CHANNEL SEPARATION REF : 30kHz OdBFS LFE 18(REF)
UNIT

ee
OO
Ec
a
ese
oe
oe
ES
far
|
or
[ROBEY
soos
Te
Te
[|
es
all
ow
[we
CL
|
a
CI
paren
fe Ts
[5]
~e
fefststa
UNIT
ae
anes
[STs
[3]
[2
fsfstspr
[Por
|e
fees
ls
[s[oTT
REF : 1kHz OdBFS L
30Hz OdBFS LFE
REF : 1kHz OdBFS LFE
30Hz OdBFS L/C/R/LS/RS/LFE
REF : 1kHz OdBFS L/C/R/LS/RS
30Hz OdBFS L/C/R/LS/RS
ese
raven [eps sy
Te fepepe De]
ranen] eT [3 [
30Hz OdBFS LICIRILSIRSILFE | 2 frjs|s|n|
eos
ec
no
ene]
3
comenierast rere wo [| CTS [3
a Ce
Cor |
: PS me er TST
= a
CS
USING VER2.0
cans TEST)
REF : 1kHz OdBFS L/C/R/LS/RS
30Hz OdBFS LFE
REF : kHz OdBFS UCIRILSIRS
REF : 30kHz “3dBFS LIC/R/LS/RS/LFE,
ST ON > SW: NO

a DTS SECTION
Measurements
conditions,
unless
otherwise
noted
:
Input
Function
:
DVD
Digital Input Mode : OPTICAL or COAXIAL
Speker Mode : FL-CL-RL, SW-YES
Trim Vol Position : All "0" dB
Test Point : Spk-out & Pre-out
Test disc : DTS Set-Up Disc VER.2
Master vol. Position : 50
* CHAPT 10 : LEFT CH. 1kHz SINE WAVE 0dBFS
11: RIGHT CH. 1kHz SINE WAVE OdBFS
12
:
LEFT
SURROUND
CH.
1kHz
SINE
WAVE
0dBFS
13:
RIGHT
SURROUND
CH.
1kHz
SINE
WAVE
0dBFS
14 : CENTER CH. 1kHz SINE WAVE 0dBFS
15 : LFE CH. 30Hz SINE WAVE OdBFS
eee
Pete
OUT
—[owcemrncane
Peete
ed
Tv
aaa
=
paar
re
fearsveneans
foe
[TET
[pase
reowon
Te
eee
oe
ee
eee
=<_
ego
jor

BLOCK DIAGRAM
DIGI
LINK
KEY MATRIX @) ©
FL DISPLAY
O
O
<TUNER>
AC3 BLOCK
DSP
yssai2
DOLBY DIGITAL/DTS
PRO LOGIC DECODER + SUB DSP
AK4110
AUDIO CODEC
Yb
DIR
itt 7
DIGITAL INPUT at)
coax1 © Ss
coax2 ©)
ot [6]
MAIN MICOM
DATA CONTROL LINE
INPUT PARTS
VIDEO PARTS
TUNER PARTS
6V
AC-3/DTS PARTS $15 = REGULATOR
MAIN AMP PARTS
POWER SUPPLY PARTS FRONT ame <<
SIGNAL PROCESS PARTS CENTER amp <2 AMP _POWER
REAR AMP
a paaekmscnstasudecacusecosvesss,
VIDEO
VIDEO1
VIDEO41 IN(©)
VIDEG1 OUT)
once neem mes enacannanateenernnscnncnenenancenceessersnecsecsoey
. 6CH DIRECT INPUT
FL ©)
FA ©)
cnt ©)
sw ©)
sa ©
a ©
SHER-00456 / DRUCK1
i ANALOG SW :
F NUU7312AL i
|_|, =
OO : i
: rep)
il sg came c=
Co Oo >
Tocedschohofadachconcnenncasonad
Model No. : RD-6106/G/RDS
ST-B
T
YY
iS
POWER
TRANS:
—
aN
ST-BY RELAY
POWER S/W
| FR CH
| FL CH
| C CH
PRE OUT
()) Sw CH
| SR CH
| SL CH
imeem dR ke a ee Oe

SHER-00456 / DRUCK2
|
cP101
PCB5 (POWER)
cP102 |cPp103
CP105
=a
() ep ap C)
POWER TRANS
cP1514
CpP152
PCB1-4
(SPKR SW)
[ti
eae eaae 2 J pce1-214/)
DATA LINE
410P
cP2014
| soe |
WIRING DIAGRAM
PCB3 (AC-3)
PCB1 (MAIN)
cP202
PCB4 (AMP)
Pde sip
PCB2 (FRONT)
10
Model No. : RD-6106/G/RDS
TUNER ASS'Y /
fase
[ cP 100 |
29SP

CIRCUIT DESCRIPTION
CXP8289600-1
1. Pin Description
8g
O O
{00x@9)
1G o+—{(1)
12G o+—(2)
PULLUP o—+(3)
POWER DOWN o—+(4)
VOLUP o—+(5)
RDS CLK o—+(6)
VOLDOWN o—+(7)
REMOCON o—+(8)
RDS DATA o—+(Q)
N.C o—+(40)
PLLCE o+—(11)
PROTECTION o+—(12)
. STEREO 0+—+(9
IF COUNT 0-—+(14)
CLK 9273/9163 0-+—+(15)
DATA 9273/9163 ©-—+(16)
KEY IN3 0-—+(17)
KEY IN2 o=—+(18)
KEY IN1 o+—+(19)
DIGI LINK o-—@0)
CE 9273/9163 0-1)
DATA 62446/72131 0-2)
CLK 62446/72131 ©-—@9
LATCH 62446 0-24)
CLK 4110/4228/912/2724 0-—+@5)
SDI 4110/912/2724 0-6)
CDI 4110/4228/912 °-—+@?)
AVREF ©-—+@8)
SPKRLY °-+@9)
TUNED ©+—@0)
23a
BS
83
)
LATCH2724/CS912 0+—+-()
2724RSR 0-—+-()
STEP OPT o- +)
GND o
RESET o
SET OPT 0+—+@)
EXTAL ©
11
XTAL ©
Qa
(=)
>
fe)
+5VBACKUP 0~—>()
O S16
UFDP-30V o-—+@)
TUN MUTE ©
0 $15
°o $14
MAIN MUTE ©
R MUTE ©
© $13
S MUTE ©
C.MUTE ©
oO $i2
$11
$10
S89
$8
S7
S6
$5
$4
$3
$2
°o $1
© STBY LED/RLY
TON DIR LED
SPK LED
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
PD 4228/4110
CS 4228
VIDEO S2
VIDEO $3
E

2. Block Diagram
| Oo
L9d~09d
)
fe
K_)
|
I
Ldd
04d
(3)
24d 193d K Z|
WW od
x k_)
Gad
0}
03d
9)
fe)
|
I
lad
00d
(8)
|
I Oo
10d
100d
KS)
&
)
| S
a
I
lad
d
ma ke
9€d
0
Odd
cz)
5
=
{ |
f=
ZHd
01
0Hd
|
f
el
BO
|
PO
es)
@
HALNNOO/HAWIL
AYNLdVO
LId
91
I
[se
004
—
RT F
am
PO
YSLNNOO/UAWIL
ZHICE
0
YAWIL
ASV
SWIL
MMA
WOSAdd
SALAG
9ESh
WVd
OYLNOD
WALSAS/
<
7
Vel
&
bal
KD
wd~ovd
(8)
&
K_))
[|
youvuang9
70010
oa
ree
eee
aes
002
OdS
@
LLINA
SOVSYSLNI
TWIdas
l
+9
1108
9
10S
Fels
Odld
JOVAYSLNI
Widas
c
lw ol a
{e)
oc
_—
Zz fe) O &
z
Cc)
‘
¥aAlda
©
WVH
|
/HATIOULNOO
5
'
ddd
1
O
adi,
|
ee,
gov
0
bey
|
8
>
ezvor
ory
Qt
DI
SLW/SLD
01
0¥/09
INTSINMY bs2.
INT2 6—+
fall
H3LHIANOO
GY
ke
ZNVO}ONY
n
> <x
INT? 6—|
INTO O—
AVREF
pada
ectaae
i
ee
ees
12

3. CPU Pin Function
PLL CE Output for chip enable of PLL IC LC72131M.
a)
S @
5
7
11
12
STEREO Input for detecting "Stereo" condition.
14 IF COUNT Input for detecting "Scan stop" condition.
PROTECTION Input for detecting "Protection" condition.
z= o)
29 SPK RLY — Output for "Speaker switch is ON/OFF".
22
23
24
25
26
27
28
30 TUNED Input for detecting "Tuned" condtion.
31 CSB912/LADY2724 Sub DSP chip select data output for YSS912/CXD2724AQ3.
32 CS4110/LATCH2724 Output for data of AK4112/LATCH of CXD2724AQ3.
33 CS 912 Output for data of YSS912.
13
|
|
:
;
|

Input for reseting the CPU. ( "L" condition is active. )
TUNER MUTE output for TUNER MUTE. ("L" condition is active )
ele
aN i)
= Oo
44
w =
45
46
Q)} Zz
>|: S QO
47 MAIN MUTE Output for FRONT CHANNEL MUTE. ("L" condition is active )
48 R. MUTE Output for REAR Channel MUTE. ("L" condition is active )
49 S. MUTE Output for SUB WOOFER Channel MUTE. (" L" condition is active )
C. MUTE Output for Center Channel MUTE. ("L” condition is active )
=
a
1G~10G Grid signal output for FIP.
z oO
14

4. Key Matrix Table
KEY IN1
KEY IN2 KEY IN3
CINEMA
EQ
DYNAMIC
RANGE
KEY
OUT1
SPK
MODE
DELAY TIME TEST TONE
TONE DIRECT DIGITAL IN
KEY
OUT2
6CH
DIRECT
STEREO OTHER
DSP MODE
STBY
3 STEREO
i
DISPLAY PTY SEL
TONE MODE
ADJ +
AUDIO
STEREO AUTO
TAPE MONITOR
VIRTUAL PROLOGIC
CH
SEL
AUDIO
VIDEO
TUNE UP BAND
FM
MODE
T/P
MODE
KEY OUT3 SPK ON/OFF
KEY OUT4
KEY OUTS SEARCH
KEY OUT6 ADJ -
KEY OUT7 SPEAKER ON/OFF
KEY OUT8
KEY OUT9
KEY OUT10
TUNE DOWN
KEY OUT11 MEMO / ENTER
15

ALIGNMENT PROCEDURES
TUNER
1. Equipment Requried
« AM Standard Signal Generator (AM SSG) « Audio Generator
- Oscilloscope e Distortion Meter
«AC Voltmeter e 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
2-2. AM Alignment
+ Output of signal generator should not be greater than necessary to obtain an optimum output reading.
e Signal generator modulation : 30%
« Signal frequency : 400Hz
« Modulation frequency : 600, 1000, 1400kHz
« Switch : press the BAND Button to AM
Step
Subject
Signal
generator}
Set
frequency
Equipment
Adjustment
setting
setting
connection
point
Tunning voltage 520kHz 520kHz DC voltmeter RF BLOCK
fad ead ak
2 RF Tracking 600kHz 600kHz AC voltmeter RF BLOCK
oscilloscope ANT coil
tape monitor L/R
3 IF Tracking AC voltmeter
Adjust for
520kHZ : 1.1~1.3V
1710KHZ: 7.2V~8.5V
(DC 1.24 0.1V)
Maximize audio output
Repeat LOW, HIGH
frequency
IF BLOCK
Coil KSNT-104!
Maximize audio output
oscilloscope
tape monitor L/R
16

Step
Subject
Signal
generator
Set
frequency
Equipment
Adjustment
Adjust
for
setting
setting
connection
point
4
Seek
level
600kHz
*
600kHz
AC
voltmeter
SVR
03
Tuned
on
point
oscilloscope
tape
monitor
L/R
2-3. FM Alignment
.
Output
of
signal
generator
should
not
be
greater
than
necessary
to
obtain
an
optimum
output
reading.
-
Signal
generator
modulation
:
MAIN
:
90%,
PILOT
:
10%
»
Signal
frequency
:
1kHz
/
Deviation
:
75kHz
«
Modulation
frequency
:
90.1MHz,
98.1MHz,
106.1MHz
.
Switch
:
press
the
BAND
Button
to
FM
Step
Subject
Signal
generator
Set
frequency
Equipment
Adjustment
Adjust
for
setting
setting
connection
point
Tunning
voltage
87.5MHz
87.5MHz
DC
voltmeter
87.5MHz
:
1.35~1.65V
_
,
108MHz 108MHz 108MHz
:
6.5V~8.5V
(DC
1.2+
0.1V)
98.1MHz
98.1MHz
AC
voltmeter
FD1
,
FD2
oscilloscope
R17
,
DC
voltmeter
tape
monitor
L/R
Minimize OV and distortion
98.1MHz
98.1MHz
MIX
coil
CO4
FM DET.OV
and
Distortion Adj
Seek
stop
level
Scan
stop
point
to
18dBu_
oscilloscope
tape monitor L/R
Minimize STEREO distortion
and Maximize separation
STEREO
Separation
AC voltmeter
oscilloscope
DC voltmeter
tape monitor L/R
SVR02 Separation L to R
Separation R to L
3. RDS Version Alignment
3-1. Alignment and Test Point
17

3-2. AM Alignment
- Output of signal generator should not be greater than necessary to obtain an optimum output reading.
« Signal generator modulation : 30%
« Signal frequncy : 400Hz
- Modulation frequncy : 600, 1000, 1400kHz
Switch : press the BAND Button to AM
1 |Tunning voltage 522kHz 522kHz DC voltmeter RF BLOCK | 522kHz : 1.1~1.3V
OSC coil 1611kHz: 7.2V~8.5V
(DC 1.2+ 0.1V)
2 RF Tracking 603kHz 603kHz AC voltmeter RF BLOCK } Maximize audio output
ANT coil Repeat LOW, HIGH
frequncy
IF BLOCK Maximize audio output
3-3. FM Alignment
i
oscilloscope
tape monitor L/R
AC voltmeter
oscilloscope {Coil KSNT-104I
tape monitor L/R
AC voltmeter SVR 03 Tuned on point
oscilloscope
tape monitor L/R
» Output of signal generator should not be greater than necessary to obtain an optimum output reading.
» Signal generator modulation : MAIN : 53.3%, PILOT : 10%
+ Signal frequency : 1kHz / Deviation : 40kHz
» Modulation frequency : 90.0MHz, 98.0MHz, 106.0MHz
» Switch : press the BAND Button to FM
Step Subject Signal generator Set frequency Equipment Adjustment Adjust for
setting setting connection point
Tunning voltage 87.5MHz 87.5MHz DC voltmeter 87.5MHz : 1.35~1.65V
108MHz 108MHz 108MHz : 6.5V~8.5V
(DC 1.2+ 0.1V)
FM DET.OV 98.0MHz 98.0MHz AC voltmeter FD1 , FD2 Minimize OV and distortion
and oscilloscope R17,
Distortion Adj
DC voltmeter
tape monitor L/R
Seek stop level 98.0MHz 98.0MHz AC voltmeter SVR 01
tape monitor L/R
STEREO AC voltmeter | MIX coil CO4
Scan stop point to 18dBu
Minimize STEREO distortion
and Maximize separation
Separation oscilloscope
DC voltmeter SVRO2 Separation L toR
tape monitor L/R Separation R toL
18

Symptom
Power On Failure.
1. FLT does not light up.
2. ST-BY LED does not light up.
Fuse Disconnection.
(Power On)
Key Disorder.
Power Off in 2~3 sec.
after Power on.
TROUBLESHOOTING
A) AC-Cord check.
B) Power Trans (Main/ST-BY) check.
C) Fuse'’s disconnection check.
D) Connector's disconnection or disjunction.
Change or close insertion of the connector.
E) inferior Stany-By switch.
F) u-COM LC & Resonator check.
1. u-COM IC B+( 5 )V check.
2. -COM clock pulse check.
A) Inferior transformer.
B) AMP drive transistor out. ( POWER TR )
C) AMP drive I.C out. ( POWER IC )
D) Regulator !.C voltage check.
1. B+ (15 )V, B-(15)V
A) Key's being pushed check.
B) Key signal input components inferior.
C) Key data check.
D) #-COM1.C or Resonator inferior.
1. 4-COM IC B+( 5 )V check.
2. -COM clock pulse check.
A) Drive I.C out. ( POWER IC )
1. Power drive voltage check. (+6 V,- V)
2. Signal IN/OUT check.
B) Drive transistor out. ( POWER TR )
C) Protection circuit check.
1. Output DC check.
2. 4-COM 1.C protection terminal check.
D) Posistor’s connector disconnection.
E) Connector's disconnection or disjuction.
F) SLEEP MODE cancellation.
F(712)
CNT ( 302, 303 )
SW (307)
1.C Pin No. ( 44 )
X-TAL ( 301 )
Q ( 214L/R/C/SL/SR )
IC ( 101/102 )
SW ( 301 )
D (310), R (328)
I.C Pin No. (70)
I.C Pin No. (301)
1.C Pin No. ( 44 )
X-TAL (301 )
1.C (710)
R (123)
1.C Pin No.{ 12)
CNT ( 301)
Bump Sound. A) POWER MUTE Transistor's out and inferior. Q ( 405, 406, 407L/R )
( During input-select switch's change. )
1. u-Com Front Mute Control PORT check. 1.C Pin No. ( 47 )
B) CENTER MUTE Transistor's out and inferior. Q ( 408, 409, 410 )
1. u4-Com Center Mute Control PORT check. 1.C Pin No. (50)
19