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  9. Panasonic SU-CH7 User manual

Panasonic SU-CH7 User manual

ORDER
NO.
AD9104082C8
Service
Manual
Amplifier
enact
Because
of
unique
interconnecting
cables,
when
a
component
requires
service,
send
or
bring
in
the
entire
system.
m@
SPECIFICATIONS
(DIN
45
500)
@
MAIN
AMP.
SECTION
Power
output
DIN
1
KHz
THD
1%
60.
2x25
W
10
kHz
THD
1%
80
2x5
W
both
channel
driven
at
240
V
Total
harmonic
distortion
half
power
at
1
kHz:
Low
Amp
0.09%
(6Q)
Headphones
output
level/impedance
300
mV/330Q
m@
PREAMP.
SECTION
input
sensitivity/impedance
PHONO
3
mV/47
kQ
MIC
0.7
mV/10
kQ
DAT
250
mV/27
kQ
S/N
(rated
power,
6Q):
Low
Amp
PHONO
70
dB
(IHF.
A
75
dB)
DAT,
CD,
TAPE
84
dB
(IHF.
A
85
dB)
Graphic
equalizer
control
80
Hz,
250
Hz,
1
kHz,
4
kHz,
12.5
kHz
Muting
—20
dB
Super
bass
55
Hz,
+44B
Output
voltage/impedance
DAT
REC
OUT
150
mV
(E)
(EB)
(EG)
(GC)
(GN)
CD
Player
System
[Tuner
|
Amplifier
|
SC-CH7
ST-CH7L
SU-CH7
SL-CH7
Technics/Panasonic
|
Amplifier
Color
(K)
ceviv
cee.
Black
Type
Continental
Europe.
Great
Britain.
F.R.
Germany
and
Italy.
Asia,
Latin
America,
Middle
Near
East
and
Africa.
(GN)
Oceania.
System:
SC-CH7
m@
GENERAL
Power
consumption
250
W
Power
supply
For
Great
Britain
and
Oceania
AC
50/60
Hz,.230~240
V
For
F.R.
Germany,
Italy
and
Continental
Europe
AC
50/60
Hz,
230
V
For
others
AC
50/60
Hz,
110
V~127
V/220
V~240
V
Dimensions
(WxHxD)
215
110x303
mm
(815/42"X
41
Yo”
1115/16")
Weight
43
kg
(9.3
Ib.)
Notes:
1.
Total
harmonic
distortion
is
measured
by
the
digital
spectrum
analyzer.
2.
Specifications
are
subject
to
change
without
notice.
3.
Weight
and
dimensions
shown
are
approximate.
Cassette
Deck
Speacers
RS-CH7
SB-¢
H7
SU-CH7
m@
CONTENTS
Page
:
Page
BEFORE
REPAIR...
2...
cee
eee
e
een
eee
2
SCHEMATIC
DIAGRAM
........0
0.0
cece
ence
eee
13~19
PROTECTION
CIRCUITRY
2.0.0...
.
ccc
eee
cece
ence
ee
2
PRINTED
CIRCUIT
BOARDS.
............
0.0.0
cece
eee
20~24
ACCESSORIES?
«5.2
sev.ccntsueSing
euip
ance
Weeks
Mey
eae
as
eles
2
WIRING
CONNECTION
DIAGRAM
.............
00.00
e
cues
25
HOW
TO
INSTALL
THE
SYSTEM.............00.0
0c
cece
ees
3
FUNCTIONS
OF
IC
TERMINALS
.........
0.00.
c
es
ce
eee
sees
26
CONNECTIONS
.......
0.
cece
ence
cece
ene
ene
4,5
BLOCK
DIAGRAM
.........
cece
cece
cents
27~29
LOCATION
OF
CONTROLS
......
00.00
cee
eee
eee
6,7
REPLACEMENT
PARTS
LIST
..........
00.00
cee
e
eee
30~36
DISASSEMBLY
INSTRUCTIONS
...............
0...
eee
ee
8~11
CABINET
PARTS
LOCATION
..............00.0
cece
eae
37,
38
DESCRIPTION
OF
FLPANEL
...............2.
ccc
cence
12
PACKING
(For
System:
SC-CH7).............
0.00
e
cece
vues
39
m@
BEFORE
REPAIR
(1)
Turn
off
the
power
supply.
Using
a
10Q,
5
W
resistor
connect
both
ends
of
power
supply
capacitors
(C703,
C704)
in
order
to
discharge
the
voltage.
(2)
Before
turning
the
power
supply
on,
after
completion
of
repair,
slowly
apply
the
primary
voltage
by
using
a
power
supply
voltage
controller
to
make
sure
that
the
consumed
current
at
50
Hz/60
Hz
in
NO
SIGNAL
mode
should
be
shown
below
with
respect
to
supply
voltage
110
V~127
V/220
V~240
V.
Consumedcurrent50H2
|
———
85~255
mA
x
PROTECTION
CIRCUITRY
The
protection
circuitry
may
have
operated
if
either
of
the
following
conditions
is
noticed:
“No
sound
is
heard
when
the
power
is
switched
ON.
“Sound
stops
during
a
performance.
The
function
of
this
circuitry
is
to
prevent
circuitry
damage
if,
for
example,
the
positive
and
negative
speaker
connection
wires
are
“shorted”,
or
if
speaker
systems
with
an
impedance
less
than
the
indicated
rated
impedance
of
this
unit
are
used.
If
this
occurs,
follow
the
procedure
outlined
below:
:
1.
Switch
OFF
the
power.
2.
Determine
the
cause
of
the
problem
and
correct
it.
3.
Switch
ON
the
power
once
again.
Note:
When
the
protection
circuitry
functions,
the
unit
will
not
operate
unless
the
power
is
first
switched
OFF
and
then
ON
again.
m
ACCESSORIES
Speaker
cords
(2)
<REC201B500-1>
@AC
power
supply
cords
(1)
<SFDACO5E03>
for
(E,
EG)
area
<SJA193>
for
(EB)
area
<RJA0004>
for
(GC)
area
<SJA173>
for
(GN)
area
Remote
control
batteries
(2)
(UM-4,
“AAA”,
R03)
@FM
indoor
antenna
(1)
<SSA270M>
for
(E,
EB,
EG)
area
<SSA272M>
for
(GC,
GN)
area
©)
eAttachment
plug
(1)
<SJP9009>
for
(EB)
area
Remote
control
transmite
r
(1)
<RAK-SC510W>
for
(E,
EB,
EG)
area
<RAK-SC511W>
for
(GC,
GN)
area
SU-CH7
@Flat
cables
(2)
Back
cover
(4)
@LW/MW
loop
antenna
(1)
and
Antenna
holder
(1)
7
and
mounting
screws
(2)
sp
<RYFO122-K>
——SSY]
for
CD
player
Blue
(REX9162)
ay
<RYFOI22K>
SS
for
tuner
<SPB1163T>
Black
(REX9163)
SLD
<RKF0127D-
K2>
for
amplifier
<SMA233-1M>
fs
<RKF0127E-K2>
ey
SS
¥
—
for
cassette
deck
<XTN3+10AFZ>
“
Installing
the
components
vertically
Left
speaker
Right
speaker
SB-CH7
Compact
disc
SB-CH7
player
So
‘2]
SL-CH7
Tuner
eS?
___
900}
ST-CH7L
Amplifier
SU-CH7
Cassette
deck
RS-CH7
J@o
Compact
disc
Tuner
player
ST-CH7L
SL-CH7
°
900
t=
es
°
——~
5}
C)
Ca
OS
o
=0
==]
ane
UES
CYT.
eee
aeme
omen
FW
a
-
-2
Amplifier
Cassette
deck
SU-CH7
RS-CH7
Installing
the
components
on
a
line
Amplifier
Tuner
Cassette
deck;
SU-CH7
ST-CH7L
RS-CH7
Compact
disc
player
SL-CH7
pean
ee
;
;
F
:
i
;
3
SUCH
m
CONNECTIONS
Flat
cables
After
connection,
please
fold
and
press
the
cables
as
flat
to
the
back
of
the
unit
as
possible.
From
the
amplifier
to
the
cassette
deck
Connecting
Hold
the
connector
with
the
recessed
part
up
and
press
Power
switch
is
located
on
the
rear
panel.
in
at
the
center
until
you
hear
Pa)
Make
sure
that
the
power
switch
on
the
back
of
the
a
click.
4
amplifier
is
switched
ON.
The
white
line
should
be
on
the
right
side.
Disconnecting
When
installing
the
back
cover,
put
this
flat
cable
out
of
the
back
cover.
Speaker
cables
Other
types
of
speaker
cannot
be
connected
to
this
unit.
Match
the
four
wires
from
the
left
and
right
speaker
cables
with
the
same
colored
levers
of
the
speaker
terminales,
then
insert
the
wires
into
the
respective
terminals.
@
Twist
the
wire.
@
Push
down
on
the
lever,
insert
the
bare
ends
of
the
wires,
and
push
up
the
lever.
(Refer
to
the
right)
Note:
¢Make
sure
the
bare
ends
of
the
wires
are
not
unraveled.
(If
they
are,
twist
them
tight
again.)
fx
fc
eTake
care
not
to
short
the
wires.
(The
main
unit
could
be
damaged
if
they
are
shorted.)
Speaker
First
connect
the
cables
to
the
speakers,
then
to
the
amplifier.
Speaker
cable
(included)
Speaker
Amplifier
Notice
for
speaker
connections:
Connect
each
color
coded
wire
of
the
speaker
cable
to
the
corresponding
color
coded
terminal
according
to
the
following
chart.
Polarity
l
High
tone
|
[Lowtone
||
Black
External
unit
connection
:
@
DAT
(digital
audio
tape
deck)
DAT
INPUT
OUTPUT
Stereo
pin
cord
Amplifier
[
REC
OUT
PLAY
BACK
et
ee
@
PHONO
(turntable
system)
Turntabl
OUTPUT
seein
Stereo
————_.
i
pin
cord
Amplifier
B
“GND”
terminal
This
terminal
is
for
use
with
turntables
which
have
a
ground
wire.
SU-CH7
m
LOCATION
OF
CONTROLS
Amplifier:
control
section
@
@
@
oe
©
© ®
©
Sound
effect
level
control
(SOUND
JOG)
This
control
is
used
for
adjusting
the
ievel
of
the
ambience
enhancement
effect
and
the
equalization
level.
Ambience
enhancement
button
(SPACE)
This
button
is
used
to
activate
ambience
enhancement
mode.
Spectrum
mode-select/demonstration
button
(-SPECTRUM
MODE-—-DEMO)
This
button
is
used
to
select
one
of
the
six
spectrum
curves.
If
you
press
and
hold
this
button,
six
types
of
sound
effects
(spectrum
curve
in
combination
with
ambience
enhancement)
will
be
sequentially
changed
(Demonstration
mode).
Super
bass
indicator
\lluminates
when
the
super
bass
mode
is
activated.
Super
bass
button
(SUPER
BASS)
When
this
button
is
pressed,
the
dynamic
low
frequency
ranges
are
boosted.
Volume
preset
button
(VOL.
PRESET)
This
button
is
used
to
make
a
volume
presetting.
Volume
level
control
(VOLUME)
This
contro!
is
used
to
adjust
the
volume-leve!
(-82
dB~
0
dB).
Note
that
—82
dB
is
the
lowest
volume
setting
and
0
dB
is
the
highest
level
setting.
Equalization
function
button
(ON/FLAT)
This
button
is
used
to
switch
the
equalization
correction
function.
If
no
equalization
correction
is
desired,
press
this
button
again
to
cancel
the
function.
(Q)
Headphones
jack
(PHONES)
Microphone
jack
(MIC)
@)
Equalization
mode-select/recail
button
(-MODE—RECALL)
This
button
is
used
to
retrieve
a
pre-programmed
equalization
curve
from
the
memory.
If
you
press
and
hold
this
button,
a
curve
you
programmed
can
be
retrieved.
Input
selectors
and
indicators
These
selectors
are
used
to
select
the
sound
source
to
be
heard.
When
the
sound
source
is
selected,
the
indicator
above
the
selector
will
illuminate.
Standby
indicator
(STANDBY)
This
indicator
illuminates
when
the
power
“STANDBY.()
/ON"
switch
of
the
unit
or
that
of
the
remote
control
is
switched
“OFF”.
Its
purpose
is
to
alert
the
user
of
the
constant
supply
voltage
to
the
internal
circuitry
even
with
the
power
switch
OFF.
For
this
unit,
even
if
this
switch
is
switched
to
the
“STANDBY”
position,
there
is
still
a
slight
power
consumption
of
about
17
watts:
this
is in
order
to
retain
of
the
“most
recent”
memory
and
the
preset-memory
functions.
EQ
suSERT-
HEAVY
»
CLEAR
»SOFT
»vocat|i*
mHPST
&
CAR
ST
7
2S50Hz
thHz
SU-CH7
ARGE
===
MAX
4kHz
12.5kHz
Amplifier:
display
section
(@
Ambience
enhancement
mode
indicator
(SPACE)
llluminates
when
the
ambience
enhancement
mode
is
acti-
vated.
(6)
Spectrum
analysis
display
This
display
shows
the
spectrum
analysis
level.
(©)
Level
meter
Display
the
volume
level
as
it
is
being
adjusted
by
the
volume
control.
When
adjusting
the
level
of
the
ambience
enhance-
ment
effect
with
the
sound
effect
level
control,
the
display
shows
the
level
of
the
ambience
enhancement
effect.
(@
Ambience
enhancement
adjustment
indicator
(SPACE)
\lluminates
when
adjusting
the
level
of
the
ambience
en-
hancement
effect.
©)
CD
edit
indicator
(EDIT)
\lluminates
when
making
an
edit-recording
of
a
compact
disc.
(f)
Volume
level
display
Displays
the
volume
level.
@)
Sound
effect
indicator
(¥Y
SOUND
JOG
A)
When
“¥”
illuminates,
it
shows
the
equalization
curves
can
be
adjusted,
and
when
“A”
illuminates,
it
shows
that
the
ambience
enhancement
effect
can
be
adjusted.
(h)
Equalization
mode
indicators
(HEAVY-CAR
ST)
These
indicators
show
which
of
the
six
equalization
curves
is
currently
used.
@
“USER”
indicator
(USER)
This
indicator
illuminates
to
show
that
the
desiredequalization
curves
can
be
programmed
into
memory
or
retrieved
from
the
memory.
@
Volume
indicator
(VOL.)
illuminates
when
adjusting
the
volume
level.
(K)
Muting
indicator
(MUTING)
Hluminates
when
the
muting
mode
is
activated.
_
SU-CH7
m@
DISASSEMBLY
INSTRUCTIONS
“ATTENTION
SERVICER”
Some
chassis
components
may
have
sharp
edges.
Be
careful
when
disassembling
and
servicing.
Removal
of
the
Cabinet
i
Removal
of
the
Volume/Filter
P.C.B.
Procedure
Procedure
o
1
Cabinet
5
S
Volume/Filter
1.
Remove
2
screws
(@,
@).
2.
Remove
the
front
panel
in
the
direction
of
arrow.
2.
Remove
the
2
screws
(@,
@).
1.
Remove
2
flat
cables
(CN204,
CN501).
3.
Remove
the
front
panel
in
the
direction
of
arrow.
seas
Removal
of
the
FL
P.C.B.
Sound
ipa
kon
Procedure
1523-4
Volume
Knob
.
Remove
the
volume
knob
and
nut.
.
Remove
the
sound
jog
knob
and
nut.
.
Remove3
screws
(Q@~®).
.
Removethe
P.C.B.
in
the
direction
of
arrow,
making
sure
not
to
damage
the
connectors
(CP604,
CP605,
CP606).
RON
|
SU-CH7
:
Ref.
No.
Removal
of
the
Microphone/
ae
Removal
of
the
Operation
P.C.B.
Headphone
Jack
P.C.B.
Procedure
Procedure
:
1-23-45
152-346
Operation
P.C.B.
Holder
Microphone/
Headphone
Jack
P.C.B.
1.
Remove
the
screw
(@).
:
1.
Remove
3
screws
(@~®).
2.
Remove
the
holder.
2.
Remove
4
claws.
3.
Remove
the
P.C.B
in
the
direction
of
arrow.
|
;
Ref.
No.
Ref.
No.
Removal
of
the
Input-Output
Removal
of
the
Rear
Panel
terminal
P.C.B.
Procedure
;
Procedure
157
12-37-58
Rear
Panel
Input—Output
terminal
P.C.B.
1.
Remove
10
screws
(@~@).
2.
Remove
the
connector
(CP902).
3.
Remove
the
rear
panel
in
the
direction
of
arrow.
Remove
the
P.C.B.
in
the
direction
of
arrow.
es
es
Removal
of
the
TP.
P.C.B.
Bis
Removal
of
the
Main
P.C.B.
Procedure
Procedure
1-2>3—
7->8—9-—10
1>2—-3—
1.
Remove
the
flat
cable
(CN701).
2.
Remove
5
screws
(@~@).
1.
Remove
the
screw
(@).
2.
Remove
the
P.C.B.
in
the
direction
of
arrow.
.
SU-CH7
Procedure
1-2>3—
7-8-9
10
Power
IC
PZ,
(Woofer)
Re
oN
ar
ay
Power
transformer
Power
!C
(Tweeter)
Regulator
transistor
1.
Unsolder
the
power
IC.
2.
Remove
4
screws
(@~@).
eWhen
mounting
the
power
IC
or
regulafor
transistor.
Apply
silicone
compound
(SZZOL155)
to
the
rear
side
of
power
IC
or
.*
Remove
the
flat
cable
(CN701).
regulator
transistor.
2.
Remove
the
4
screws
(@~@).
as
Removal
of
the
Fan
Motor
.
Remove
the
motor
cover
(shown
in
Fig.
3).
.
Remove
the
motor
from
the
fan
casing
(shown
in
Fig.
4).
.
When
mounting
the
motor
fan.
align
the
fan
casings
Procedure
: ;
157513
progection
with
the
hole
of
the
fan
motor
(shown
in
Fig.
5).
oh
Ww
1.
Release
the
3
claws
(shown
in
Fig.
1).
2.
Insert
a
screwdriver
at
the
root
of
the
cooling
fan.
FanMotor
Rear
Panel
be
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|
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[aq
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Bass"
abe
MOP]
Space]
MSC2458ABCTA
2SD1762EF
1SS254TA
1SR35200TB
Ca
e
fo
Ta
Ar
D
LA,
A
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Z
067
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Anode
1SS291TA
GP15GLF
MA4033MTA
MA4043MTA
ca
MA4051MTA
)
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MA4062MTA
f
(-
MODE—RECALL)(
ON/FLAT)
A
MA4068MTA
Ema
MA4030LTA
Anode
PHONO
|
co
|
[
TAPE
|
DAT
HOE
LN873RP-LS
LN1
73WP38
LNO24428P
MA4120MTA
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oe
Cathode
son
JE
Anode
POWER
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GHgaa
ol
THERMISTOR
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A
7
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PC.B.
a
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<
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A
Ca
>
PHONES
(GND)
Short:
power
“on”
Mae
(PWR)
ao
~24—
Ne
an
ns

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