Marantz SR-66 User manual

Service
74
SR66/o28
SR-66U
Manual A/V Surround Receiver
TABLE OF CONTENTS
SECTION
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PAGE
1: TECHNICAL SPECIFICATIONS :scjieaisss sai asstuicesndssesisceanielaee neat atid lett cee eee chee a
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4.
SCHEMATIC
DIAGRAM
AND
PARTS
LOCATION
(Pattern
Side)
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.9
5.
SERVICE
TEST
PROGRAM
OF
THE
MICROPROCESSOR
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tenes
24
6.
ALIGNMENT
PROCEDURES
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7:
EXPLODED
VIEWAND
PARTS
LIST
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PARTS
LIST
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35
Please use this service manual with referring to the user guide (D.F.U) without jail.
model SR-66
Printed in Japan First §ssue 1996.3
4168w 855080 ACT

MARANTZ
DESIGN
AND
SERVICE
>
Using
superior
design
and
selected
high
grade
components,
MARANTZ
company
has
created
the
ultimate
in
stereo
sound.
Only
original
MARANTZ
parts
can
insure
that
your
MARANTZ
product
will
continue
to
perform
to
the
specifications
for
which it is famous.
Parts
for
your
MARANTZ
equipment
are
generally
available
to
our
National
Marantz
Subsidiary
or
Agent.
ORDERING PARTS:
Parts
can
be
ordered
either
by
mail
or
by
Fax..
In
both
cases,
the
correct
part
number
has
to
be
specified.
The
following
information
must
be
supplied
to
eliminate
delays
in
processing
your
order:
. Complete address
. Description of parts
. Way of shipment
nor WN
USA
MARANTZ AMERICA, INC.
440 MEDINAH ROAD
ROSELLE, ILLINOIS 60172 - 2330
USA
PHONE : [phone]
FAX : 708-307 - 2687
PROF ESSIONAL-USA
SUPERSCOPE TECHNOLOGIES, INC.
MARANTZ PROFESSIONAL PRODUCTS
1000 CORPORATE BLVD., SUITE D
AURORA, ILLINOIS 60504 USA
PHONE: [phone]
FAX > 708-820-8103
AUSTRALIA
MARANTZ AUSTRALIA
3 Figtree Drive
Australia Centre
Homebush, NSW2140 AUSTRALIA
PHONE: [phone]
FAX > [phone]
TAIWAN
PAl- YUING CO., LTD.
6 TH FL NO. 148 SUNG KIANG RORD,
TAIPEI, 10429, TAIWAN R.O.C.
PHONE : [phone]~8
FAX : [phone]
JAPAN—Technical
MARANTZ JAPN INC.
35-1, 7- chome, Sagamiono
Sagamihara- shi, Kanagawa
Japan
PHONE : [phone]
FAX [phone]
. Model number for which part is required
.
Complete
part
numbers
and
quantities
required
CANADA
LENBROOK INDUSTRIES LIMITED
633 GRANITE COURT,
PICKERING, ONTARIO L1W 3K1
CANADA
PHONE : [phone]
FAX > 416-831-6936
PROFESSIONAL -CANADA
TC ELECTRONICS CANADA LTD
540 FIRING AVE.
BAIE D'URFE, QUEBEC H9X 3T2
CANADA
PHONE: [phone]
FAX ; 514-457-5524
HONG-KONG
FORWARD INTERNATIONAL CORP. LTD.
15 TH FLOOR, REGENT CENTRE,
88 QUEEN’S ROAD, CENTRAL, H. K.
PHONE : [phone]
FAX > [phone]
MALAYSIA
WO KEE HONG ELECTRONICS SON. BHD.
NO. 102 JALAN SS 21/35, DAMANSARA
UTAMA, 47400 PETALING JAYA
SELANGOR DARUL EHSAN,
MALAYSIA
PHONE : [phone]
FAX : [phone]
SHOCK, FIRE HAZARD SERVICE TEST:
.
Signature:
any
order
form
or
Fax.
must
be
signed,
otherwise
such
part
order
will
be
considered
as
null
and
void.
EUROPE
MARANTZ EUROPE B.V.
P.O.BOX 80002
BUILDING SFF2
5600 JB EINDHOVEN
THE NETHERLANDS
PHONE : [phone]
FAX : [phone]
TRADING
MARANTZ EUROPE B.V.
P.O.BOX 80002
BUILDING SFF2
5600 JB EINDHOVEN
THE NETHERLANDS
PHONE : [phone]
FAX > [phone]
THAILAND
MRZ STANDARD CO.,, LTD.
746-750 WANGBURAPA BANGKOK
10200 THAILAND
PHONE: [phone]
FAX > [phone]
SINGAPORE
WO KEE HONG (SINGAPORE) PTE. LID.
29, LENG KEE ROAD
SINGAPORE 159099,
PHONE: [phone]
FAX : [phone]
HAV SUV RRA
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CAUTION:
After
servicing
this
appliance
and
prior
to
returning
to
customer,
measure
the
resistance
between
either
prinary
AC
cord
connector
pins
(
with
unit
NOT
connected
to
AC
mains
and
its
Power
switch
ON
),
and
the
face
or
Front
Parel
of
product
andcontrols
and
chassis
bottom.
Any
resistance
measurement
fess
than
1
Megohms
should
cause
unit
to
be
repaired
or
corrected
before
AC
power
is
aptied,
and
verified
before
it
is
return
to
the
user/customer.
Ref. UL Standard NO.1492.
In case of difficulties, do not hesitate to contact the Technical
Department at above mentioned address. 951 1 08K!

1. TECHNICAL SPECIFICATIONS
[(JFRONT
AMP
SECTION
(Condition:
DOLBY
PRO-LOGIC
OFF)
Unit
Norminal
Limit
-
RMS
Output
Power:
Both
channels
driven
at
40
Hz,
0.3
%
THD,
8
Q
load
Ww
>
82
>
80
Both
channels
driven
at
1
kHz,
0.3
%
THD,
8
©
load
Ww
>
82
>
80
.
Inter-modulation
Distortion(60
Hz
:
7
kHz
=
4:
1
SMPTE)
at
80
W
output,
8
©
load
%
0.05
0.08
- Total
Harmonic
Distortion
at
20
Hz
-
20
kHz,
80
W
output,
8
©
load
40
Hz
%
0.15
0.3
1
kHz
%
0.1
0.2
20
kHz
%
0.15
0.3
-
Frequency
Response
at
CD,
1
W
output,
8
©
load
20
Hz
-
40
kHz
dB
+3
+3
-
Input
Sensitivity
for
80
W
output,
8
©
load
CD/AUX
mV
200+
20
200
+30
-
Tone
Control
Bass
at
100
Hz
dB
+10
+12
Treble
at
10 kHz
dB
+10
+12
.
Channel
Seperation
with input
shorted
at
CD/TAPE
1
kHz
dB
45
35
10
KHZ
dB
40 30
.
Signal
to
Noise
Ratio
with input
shorted,
IHF
"A"
weighted
CD/AUX/TAPE
dB
>
90
>
87
_ICENTER
AMP
SECTION
(Condition:
VCR1
input,
230
mV
input
level
at
1 kHz,
center
level
with
master
vol. max.
adj., WIDE
mode)
-
RMS
Output
Power
at
1
kHz,
0.3
%
THD,
8
Q
load
W
>
52
>
50
-
Signal
to Noise
Ratio
with input
shorted,
IHF
"A"
weighted(PRO-LOGIC,
3-STEREO)
dB
>
70
>
65
-
Frequency
Response
at
1
W
output,
-3
dB,
8
Q
load(PRO-LOGIC)
Normal
Hz
100-17000
150
-
15000
Wide
Hz 30-17000
5)-
15000
(]REAR
AMP SECTION
(Condition:
VCR1
input,
230
mV input
level
at
1 kHz,
rear
level
with
master
vol.
max. adj.)
-
RMS
Output
Power
at
1
kHz,
0.9
%
THD,
16
Q
load
W
>
27
>
25
.
Signal
to Noise
Ratio
with input
shorted,
IHF
"A"
weighted,
20
ms
delay
time(PRO-LOGIC)
dB
>
65
>
60
-
Frequency
Response
at
1
W
output, -3
dB,
16 © load(PRO-LOGIC)
Hz
80-7000
1)0
-
6000
CJFM
SECTION
(Condition: 65 dBf antenna input, 1 KHz MOD., 75 kHz DEV.)
- Tuning Frequency Range
100 kHz step U MHz 87.5-108
50 kHz step . /02B MHz 87.5-108
. Usable Sensitivity
at impedance 75 QO, 3% THD U dBf < 16.2 < 20.2
at impedance 75 Q, 26 dB S/N /02B dBf < 16.2 < 20.2
- Image Rejection Ratio |
at
106.1
MHz
U
dB
>
40
>
35
at
106
MHz
/02B
dB
>
80
>
70
.
IF
Rejection
Ratio
at 90.1 MHz U dB = 75 > 70
at 90 MHz /02B . dB > 75 > 70
en ie

- Full Limiting at -3 dB
- 50 dB Quieting Sensitivity with IHF band pass filter
at 98.1 MHz, U MONO
STEREO
at 98 MHz, /0O2B MONO
STEREO
- Signal to Noise Ratio with IHF band pass filter
at 1 mV input MONO
STEREO
- De-emphasis at 40 - 12000 Hz
73. us U
50 us /02B
- Auto Stop Level
at 98.1 MHz U
at 98 MHz /02B
- Output Voltage
at 75 kHz DEV., 1 kHz MOD., 1 mV input, MONO
- Multing Threshold
at 98.1 MHz U
at 98 MHz /02B
- Supurious Response with 1/2 IF
at 98.1 MHz U
at 98 MHz /02B
- Capture Ratio at 1 mV input
- Alternative Channel Selectivity at 45 dBf
+400 kHz U
+300 kHz /02B
- Total Harmonic Distortion at 1 mV input, 1 kHz
U MONO
STEREO
/02B MONO
STEREO
CLIMPX SECTION
- Stereo Seperation
at 100 % MOD., 1mV input, IHF band pass filter 1 KHz
10 kHz
- Automatic stereo threshold
at 98.1 MHz U
at 98 MHz /02B
LIAM SECTION
(Condition: 80 dB/m(10 mV/m) antenna input, 400 Hz, 30 % MOD.)
- Tuning Frequency Range
10 kHz step U
9 kHz step /02B
- Usable sensitivity at 400 Hz, 30 % MOD., -20 dB S/N
600, 1000, 1400 kHz U
603, 999, 1404 kHz /02B
- Image Rejection Ratio at 1400 kHz(1404 kHz for /02B)
- IF Rejection Ratio at 600 kHz(603 kHz for /02B)
- AGC figure of merit from 100 mV/m at 1000 kHz(999 kHz for /02B)
- Total Harmonic Distortion at 400 kHz, 30 % MOD., 10 mV/m input
Unit
LN
dBf
dBf
dBf
dBf
dB
dB
dB
dB
dBf
dBf
dBf
dBf
dB
dB
dB
dB
dB
%
%
%
%
dB
dB
dBf
dBf
kHz
kHz
dB/m
dB/m
dB
dB
dB
%
Norminal
1.5
< 20.2
< 42.2
< 20.2
< 42.2
> 70
> 65
28
28
28
28
70
70
VM
Own ano
lA
os)
oo
< 0.5
< 0.5
< 0.8
VM
Nw oS)
28
28
Limit
2
< 24.2
< 45.2
< 24.2
< 45.2
V WV
Oo
“I on oo
IA A WIA
-9O00
ee
(|
520 - 1710
522 - 1611
< 60
< 60
28
30
45
<2

Unit Norminal —__ Limit
-
Output
Voltage
at
400
Hz,
30
%
MOD.,
10
mV/m
input
mV
200
200
+
50
.
Audio
Response
at
10
mV/m
input,
1
kHz
/
0
GB,
1000
kHz(999
kHz
for
EUR/AUS)
/
-6
dB
Hz
80-2300
100-2000
.
Selectivity
at
350
;v/m,
+9
kHz(+10
kHz
for
EUR/AUS)
dB
225
>
20
.
Signal
to
Noise
Ratio
at
1000
kHz(999
kHz
for
EUR/AUS)
dB
>
40
>
35
.
Auto
Stop
Level
dB
58
58+6
CIGENERAL
.
Speaker
load
impedance
--------------------------n---n
ence
enn
n
nnn
nnnn
nnn
n
nn
nnnnnnnn
nn
e
8QO
.
Power
consumption:
|
No
load,
NO
Signal
------------------------------n
2
nn
nn
nnn
nn
nnn
nnn
50
Watts
1/8
\W
PM
aX.
------n--nnn
nnn
nnn
nnn
nn
nnn
nn
nnn
nnn
nnn
nner
eee
enn
nn
en
nnn
enema
nnn
nnn
210
Watts
Pa
(Undistorted)
with
outlet
--------------------200----—-----o
nn
nnmn
nn
nrnnnrnnnrnnnnnnnnnnnnnn
nnn
nrnmsm
650
Watts
.
DimenSiOnS(WXHXD)
---------------n-nnn
nnn
nn
nnn
nnn
nnn
nnn
435
x
125
x
350
mm
»
Weight(Net.)
------------------nnnnnn
nnn
nnn
nnn
nnn
nnn
nnn
nnn
nnn
11.8
Kg(26
Ibs)
(POWER
REQUIREMENTS
|
[J
--nnnnnwnnnnnnn
nn
nnn
en
nn nn
nn
nn
en
nee
n
mene
neem
enna
nnn
nana
nnnnnnennnnnnenanananenanannnnannncacanensacconanacacasmensenn
ans
120
V,
60
Hz
|OQB
-n--nn----nnwnwe
cen
nnnnnn
cece
nnn
n
nn
ennn
nnn
n
en
nnnnnnnnnnnnnnnnnnnnannnnnnnnannnnnacnnnnnmncnancamnnnnanaaaanmmnnnnamnnnnnns
230
V,
50
Hz
Notes:
Norminal
specs
represent
the
design
specs.
All
units
should
be
able
to
approximate
these,
some
will
exceed
and
some
may
drop
slightly
below
these
specs.
Limit
specs
represent
the
absolute
worst
condition
that
still
might
be
considered
acceptable:
In
no
case
should
a
unit
fail
to
meet
limit specs.

2. BLOCK DIAGRAM
FM
=
met joa
DIGI
EY LINK
RESORT: . -MATaTx
NATOR an Bene ; .
CLK.
CE.
TUNED <}— cpu = naeve
STEREO
CPU
REGU.
TRANS
MONO
: MUTE DATA
CONTROL LINE
=
wees
:
730V
U1
20V/60Hz
eure MPX. ) IP FL AC 6V.4 /02B :-230V/S50Hz
Caer INPUT PARTS aay ae :
SURROUND
PARTS
-15V
[|v
-45Vv
V pet.
OE T .
TUNER PARTS RY
MAIN AMP. PARTS |
POWER
SUPPLY
PARTS|
FRONT
AMP.
CENTER AMP. POWER
RIGHT CHANNEL sT-8y RELAY
Fat
NA i
6V
A
C OUTLET
AMP
NWA
JEP seayssvenae omy) (SAME. AS: THE (LEFT CHANNEL)
BY-PASS/ IC303
AE. PROTECT
MAIN VOLUME MAIN 12304
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3. WIRING DIAGRAM
2.
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oe
‘enjn)
BB
TUNER
B’D
CNT
PLUG
SPiem/m
CNT
PLUG
7Plem/m
ao
FROM
FRONT
B'D
FAOM
MAIN
B'D
Oy
OO
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9
a
=
40010018410
eo
Ac
CODE
SUPPLY
B’D
Sf
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*O0000R9]
209000
4004001400
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al
J),
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exzesugese!
en
FROM
vCcR2
B’
D
v
CP603
LV PLUG eP
FROM TRANS
&
LA
[ee]
Aff FROM SPK.B’D 4004001440
f ae ee eee ~
CNT PLUG CNT PLUG ' FRA731 ONLY :
ESS eae , 4P (2. 5m/m) 9P(2.5m/m) TOM er Beue Sees = = a= 4 TO TUNER B'O
econ O0U0 Sau CRON oes 3P lem/m) 7P(2.5m/m)
aie se ac 3 q < ‘ OM FRONT 8 g e ep oo
G 0 a i)
a rT re a (eSes) a (000000000 | PLOY ae
oppo a o 2 5P(2.5m/m)
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FROM TRANS FROM TRANS
FROM MAIN B’'D
oo
PS we ee ee we ee agp ee r 4 J Jj aa
CNT ASS’ y :
Pleo.
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sleet a OPS EPP R ERNE
Dest eg ate el he eae ee a ee ee eS J
D
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a
a
MAIN B’ D
4001001900
TUNER
( )F ALG
TO SPK. B’
CNT ASS’ Y 12P(2.5m/m)
| ePl2.5m/m) aaereren
( ) Ic
} fare) CEC)
hati
LV CNT 3P
FROM TRANS CP303
BU
|
i
HF
CNT ASS’ Y 3P(2em/m)
TO SUPPLY B’ D
CN304
LOCO!
- ae eae
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at
|
cez04
..€
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mins
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CNT
ASS’
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9P(2.
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CNT
ASS’
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9P(2m/m) FPC
CNT
_
19P
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ES
2a
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FROM
MAIN
BD
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TO
SUPPLY
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PLUG
CNT
PLUG
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CNT ASS’ Y 4P(2.5m/m)
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4. SCHEMATIC DIAGRAM AND PARTS LOCATION (Pattern Side)
—
AdS
INOvsa———,
:
‘
v
xdadNvads
@
vaNvads
:
pads
YVAN
J
MdS HAINES g
4
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1/50 pane
C427
TC309
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OG/T
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50
10/7
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WLOTVLY
MAIN B’D FR754/SR66
400 100 19800
KTC3198Y
+,
IC305
NJM2177A
62-63. | —-BPF-OQUT“IN
64. NC
39-40. NR-VCF/IN
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Cxnv/Als
OTC1147S
TO FAONT BD
TO TUNER B' D
REAR
PRE -GUT
PRE-OUT
10

in(4001001900)
P.C.Board Ma
12
11

*xFEI01
FM FRONTWENO
HA12016
1N4148
(»)
0
i)
<
a
LA1266G
FR7541/SA66/FA73 4
TUNER B’D
4001001810
Ic103
LM7001
7.
FR751/FR731
VCRe B’'D
26
C355
400
1001830
as 33/16
ar}e
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TAOS.
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13
14
*REMARK
Pa ee
eCF 104
Petar ere Sp ee
«C1147
4
wise | orcoism | 0.00- |
1.Resistance value are indicated
ohms unless otnerwise specified
(K#4.000 M=4. 000. 000)
2. Capacitance value are snown in
microfaraces unless otherwise
noted {[{P=micro-microfarade!
CAUTION
Safty precaution to be followed
Guring servicing
1)Since these parts maked with
are critical part for safty
JN use tne one deserviseo the
part list
2)8efore returning tne receiver to
tne customer make appropriate
leakage current or resistance
exposed part are oroperty
insulated from tne supply
r

P.C.Board Tuner(4001001810)
T/M
vcRi VCR2
cCD/DECK
P.C.Board VCR2
(4001001830)
15
16

#61
“62
#64
TUNING TUNING
P
e
5
AM
sweo6
eT
BASS TREBLE
4 Sw2i0 Sweii
FL101%
STEREO
MONO
SLEEP CH
VIDEO 12 NA Wt
a a 1FRA731 ONLY
LO'FA751/SR66 !
HI: FA731 :
Lee mew ee em ew ws
PH
ce20o0 c20i
Oey To: 047
FR75 1/SR66/FA734
FRONT B’D
400 1004800
SS [x
| R236 _|
| 4.7 | JUMPER |
| R237 | 4.7 | JUMPER
-— 8236
Cce2o9s
100/35
POWER OFF MUTE C)
[irc ac) ef}
o
i
os
Ne
BALANCE
Sweia
PRESET
Sw2i6
17
uPD7BO44GF
TO TUNER
Di eases On oecemeeel a arenes Ua ma Me
Cai:
10/50
o206
OTC114YS
18
/
a209
KTALOIM
Q201
OTC114YS
TO PWR Sw B'O
TO POWER SUPPLY B'D
FR751/FA731/SR66
POWER SW B’D
400 1001820
TO FRONT B°D
4.Resistor values are indicated in
onms unless otnerwise specified
{x=3. 000 M=1-000-000 }
@.Capecitor valves ere inaicetes in
microfarsdes unless otnerwise
specified.
CAUTION
Setety precaution to be foallowed
Guring servicing
1)Since tnose perts marked with
ere critical parts for safety.
use only the one descrived in the
eerte list
(p=micro-microtececdes |
2i@etore returning tne set ta the
customer make sooroprisate leakage
current or resistence measurements
to cetermine tne exoosec parts
are properly insulates from tne
supply circuit.

P.C.Board Front(4001001800)
P.C.Board Power Switch
(4001001820)
AL OD 1V-04
19
20

FRONT MAIN BD
FRONT H/P BO
RBO1IL RBO1R Sweoi
330(2w) 330/leaw)
PHONE |
TO SPK SEL B’'O
21
i
a
lu
x
<
Ww
a
W)
SPEAKER-B
FR7S41/SR66 (ONLY)
SPEAKER SEL B’D
4004001410
FROM MAIN B'D
FROM FRONT 8'0O
POWER SUPPLY B’
FR7S1/SR6E6E/FR731
4004001400
c6oi
1000/35
R6OS
2K
=
Ro
on
ON
oa
+41
S
Sad
THER. FUSE
in4sa002
POWER
TRANSFORMER
1N4002
0608
1N4002 TRANS6O 1
1N4002
T 0609
iN4002
0610
c6o0a
470/725
| R606
32. BM(1/2W)
OUTSET PP Ms ak lates a
SWITCHED
QO. 0047/400VAC
c6i1
CP603
Q601
KTC319B8Y
*xAC 120V/6O0Hz (VU)
*AC 230V/S50Hz (“02B)
| F603 [SB250ma [T250mA
sez.sal| rea || F505 | seca
NOTES
1.Resistor values are incicated in
onms unless otherwise specified
(K=1. 000 M=1.000.000 }
2-Capecitor values are ingicatea in
microfaraces unless otnerwise
specified.
(p=micro-microtareces |
CAUTION
Safety precaution to be followed
auring servicing
11Since those parts maerkeg with GO
ere critical oarts for safety.
vuee only tne one descrided in tne
perts list
2)Before returning the set to tne
customer make appropriate leakage
current or resistence measurements
to getermine tne exposed parts
are properly insulatec from tne
Supply circuit
22
| S03 |sa2somalr2soma|
S82. 5A
Ir3. 15a]

.C.Board Power Supply
(4004001400)
P.C.Board Headphone
(4004001430)
)
vo
Jo
®o
an
P.C.Board Speaker Selector
(4004001410)
23
Sa a ot

5. SERVICE TEST PROGRAM OF THE MICROPROCESSOR
IC200 : uwPD78044GF (8-bit CMOS Microprocessor)
1. Pin Configuration
T6 (1)
| T5 (2)
rip || ©,
DRIVE DIGIT 18 4)
T2
a 1
To
Voo
LM7001 -———_(9)
NJU9701 -———_(10)
CONTOL IC CLOCK
CONTOL IC DATA -———(12)
LC7821
TDA7313
N.C
TC9176
RESET
SR66(FR-751)/FR-731 ID -———(48)
T.TONE MUTE
A.Vss
NS1
NS2
CHMODE -———@3)
MAIN MUTE 24
o
z
0
z
Oo
Z
FIP DRIVE
SEGMENT
[oT
- N OO FT DD ©
nnn Mm MD W
Vioad
S7
[oe]
i?)
fo]
n
(oe)
-
79) a
FIP DRIVE:
| SEGMENT
N
no
CO-PIPITI~P6-75)-74 7-73-7970) -69)-16 8-167) +6668
@)
NS3
CENTER MUTE
~)
SURR.MUTE
uPD78044GF
28)~29(30)—31)-32-G334)35
tee ee
a ae
x oF
x
24
©) &)
TUNER MUTE
ST/BY LED
ST/BY
KEY5
64-—_——_~ $13
$14
S15
S16
DOLBY PRO-LOGIC
3- STEREO
HALL
3-STEREO
VCR IN.2
AMP MUTE
CENTER MODE1
——- CENTER MODE2
Vop
STEREO
TUNED
M.VOL IN2
Vss
M.VOL IN1
RMC
POWER DOWN
* PROTECTION
~ KEY1
- KEY2
——— KEY3
|
< EHS OXOXEKD OOOO OVODOO BODOG SBDABWS)
KEY4

2. Key Matrix
K. SCANO K. SCAN1 K. SCAN2 K. SCAN3
PIN 61 PIN 62 PIN 63 PIN 64
KEY IN1 TUNING/
PIN 43 cance PRESET a
KEY IN2
PIN 42 TREBLE VCR2 PROGRAM po
KEY IN3
KEY IN4 .
KEY IN5 |
PIN 39 TUNING UP TAPE | ed POWER
3. Block Diagram
eo
TOO/P30 O 16 ba TIMER/ Gut
TIO/INTPO/POO O—=| EVENT COUNTER PROGRAM COUNTER on fee PIO-P17
TO1/P31 © B bit TIMER/ =) J .
T11/P33 © EVENT COUNTER | Say roma E> P20-P27
GENERAL REG. K___ >
wee we mee ee wee
DECODE
AUD
CONTROL
TO2/P32 O-——| bil TIMER/ eum
ROM
TI2/P34 Oey EVENT COUNTER 2 PROGRAM MEMORY
f
WATCHDOG TIMER K_ >
“WATCH TIMER |
Cofem_f> mm
g r=
d
Pad, P8i
WN
CIO/INTP3/PO3
O—~|
EH
UP/DO
ms
|
ae —
S
PORTO P90-P97
S10/SBO/P25 Oo
SERIAL
SOB Uees 2 INTERFACE O a
SCKO/P27
©
:
100-P107
s})/P20 ©
SO}/P21 ©
SERIAL >
SCKI/P22 © INTERFACE 1
sTB/P23
©
P)10-P117
BUSY/P24 ©
ANIO/P10
~ANII/P17
BUZ/P36 — PCL/P3S P120-P127
Vee O-——{A/D CONVERTERK >
AY,, ©
AVace O
INTPO/TIO/POO | INTERRUPT
-INTP3/C10/PO3 CONTROL
FIPO-FIP33
25

= a 5
“Tl
c 5 3 =.
2) = a
rPinNo.[ Symbol [Description SOC~C~S;~S;7;7;7;7;<;
8
Veo «(|
#5Vpowersuppy.
CC—‘“;CS™OC™~™CO
CY
"9
EM7001___|
Chipenable
output
for(M7007.
ss
SC—“*‘“s*‘“*s‘“‘;*S*™*~*~*
and LM7001.
Not used |
Chip enable output for TC 9176.
18
SR-66(FR-751)/
|
Input
for
selecting
SR-66(FR-751)
or
FR-731
mode.
:
FR-731 ID According to each mode, data input is as follows.
19
21/22/25
Oo
T. TONE MUTE
A.Vss
NS1/NS2/NS3
SR-66(FR-751)
FR-731
Output for PRO-LOGIC test tone mute.
(At "H", it is active.)
Analog ground.
Control data output for selectings channel in the test tone mode.
Setting are as follows.
| TESTTONE(OFF) | H | A | A |
A: Previous states
23 CH. MODE Port for settings of PRO-LOGIC and 3-STEREO mode.
According to each mode, data output is as follows.
| MODE | _—— OUTPUT
3-STEREO High impedance
PRO-LOGIC
OTHERS
24 MAIN MUTE Output for main mute.{(At "H", it is active.)
26 CENTER MUTE | Output for center mute.(At "H", it is active.)
2/7 SURR. MUTE Output for surround mute.(At "H", it is active.)
28 STEP According to region, input for selecting the frequency band and the steps
of FM and AM.
Settings are as follows.
REGION | FREQUENCY BANDS | STEPS STEP
FM: 87.5 - 108 MHz 100 kHz
AMEND AM: 520 - 1710 kHz 10 kHz
FM: 87.5 - 108 MHz 50 kHz
Connected 0 Voo,
Reference Voltage.(Connected to +5V, Not VDD.)
Ground.
26

"Pino. [Symbol | Description SCS
36 Output for tuner mute.(At "H", it is active.)
37 Output for driving stand by LED.(At "H", it is active.)
8 When the power is on, contro] data output is "H".
3 ST/BY
When the power is off, contro! data output is "L"
and last memory function is actived.
39-43
44 PROTECTION Signal input for protection.
45 POWER DOWN Input for power down.(At "L", it is active.)
46 Input for remocon data.(At "L", it is active.)
47/49 M.VOL. IN1/IN2 Input for main volume up/down.
VOL.UP VOL.DOWN
M.VOL.IN 1
i ee
M.VOL.IN 2 | ay dt
50 TUNED input for detecting station during tuning.
ae | If "L" is inputed during tuning, tuning stops at that frequency.
51 Input for lighting the STEREO indicator.(At "L", it is active.)
52 +5V power supply.
53/54 CENTER MODE Control data output for center mode in the DOLBY PRO-LOGIC and the
2/1 3-STEREO mode.
Settings are as follows.
CENTER MODE
L
L
NORMAL, OFF[ L | oH
Wie | HH | iL
[PHANTOM [LL
55 AMP MUTE Output for Amp mute.(At "H", it is active.)
56/57 VCR IN.1 / Contro! data output for selecting VCR1 or VCR2 video signal.
VCR IN.2 According to each mode, data output is as follows.
MODE | VGR INT | VGRIN2 [REMARKS
OTHERS | A | A _| A: Previous state:
Last memory function is available.
58 HALL Output for driving HALL LED.(At "H", it is active.)
(FR-751/SR-66 Only)
3-STEREO Output for driving 3-STEREO LED.(At'"H", it is active.)
0
6 DOLBY PRO-LOGIC| Output for driving DOLBY PRO-LOGIC LED.(At "H", it is active.)
61-70
7
72-77
78-80
Le ee AD ER eR a ee ee FT ee EE A Ce Em ie Ok tee pe ey ee

6. ALIGNMENT PROCEDURES
1. Equipment Required
« AM signal generator « Audio generator
« Oscilloscope « Distortion meter
« AC voltmeter « DC voltmeter
« FM signal generator « Frequency counter
« Stereo modulator
Note : Remove line cord antenna from FM external antenna terminal when aligning.
2. Alignment and Test Points (Tuner P.C.Board)
—_- TP3 (VT)
SEPA.ADJ
SVR103
28