Marantz 4270 - Page 2

TABLE OF CONTENTS
SECTION
PAGE
Vint
OGUCtiOny:
25
2e
56
acaie
Scheer
gee
wie
dig
ove
NS
TGA
web
wre
ate
b
dae
Ba
ele
bod
eave
eee
1
MOLVICG
NOUES:
a
getcci
ewe
ven
whe
OA
ae
ot
oe
wen
eae
a
Ree
ea
ES
1
AM
Tuner
.........
Tain
wAraalael
acest
oie
Sais
owt
AGC
a
wE
he
Mid
Raha
FR
ee
bate
ee
Wee
1
PI
ROR
cso
25
tid
dew
teen
Ga
wr
Sie
Bes
fees
We
Nw
ee
a
a
ae
EO
Rei
ee
2
Phonoand
Pre-Amplifier
............
000
c
ccc
cccececceccecucceccecuceveucense
5
PRON
YUE
3k
Fw
ab
oseRewreto
th
toitaay.
wre
a
cual
atop
le
Sw
win
We
a
Oeie
eehig
a
maces
mame
laeered
6
400Hz
Tone............2.000
0s
SRW
ie
RAW
wie
Wie
Rhiaae
ae
howe
heed
phage
eda
6
Dolby
SWiteh
cca
cy
totce
a
as
wie
whe
ead
oan
hp
wh
Gin
beale
dw
we
eae
al
Sida
cee
lok
7
Record
Level
(L)
(UR)
ewe
ce
etsakea
ee
tas
ndedelnd
neved
el
ies
Geog
So
sdaee
ress
7
Doiby
FM
Preset
Level
Controls
.............cccececucecececs
i
Tanita
waht
tt
7
SOOM
Z
TONG
SWIG
s
oii
s
ines
sob
bak
ue
ead
oe
Lee
Mone
Ween
wae
ie
ie
eae
7
FM
De-Emphasis
Switch
...........
0.0
cece
ec
cece
ence
ec
anccncceeterrenuvaes
7
Power
Amiplitiet
cdi
ict
eee
a
ew
oo
ane
ancl
alee
Shee
K
Mia
Sram
mg
eta
ah
haan
8
BTL
(Balanced
Transformer-Less)
Connection
...........02ccceccccccccccceccees
8
Power
Slipply
UNIt
sa.
cad
waa
o4nie
25
aaa
G50
od
eae
on
ORE
R
Ow
hes
a
ROG
Bae
Cale
wk
8
Audio
Trouble
Analysis
...........
00:
ccc
c
cece
cece
cevscrcesececeeuceacunune
8
Test
Equipment
Required
for
Servicing
............ccccesecccecceccesevevuceue
9
AM
Alignment
Procedure
........
0...
c
cece
cece
eect
nececcnesureeretenrecves
9
FM
Alignment
Procedure
..........
0c
cece
ccc
ce
cence
cece
canveeetecveneeae
10
Audio
Adjustment.
io:
ce
elie
ds
wade
Senseeveeeecceeyaewecteearacobes
dees
11
Automatic
Voltage
Regulator
Adjustment
..............cccce
cee
cccencerceccense
11
Dolby
Alignment
Procedure
........
0.
ccc
cece
ccc
cece
cece
nea
esteeeneseaneees
11
Alignment
Procedures
of
Dolby
FM
Preset
Level
Controls
.............cecceecceece
12
Explanation
of
the
Dolby
Processing
Chart
.........
0.
ccc
cece
ccc
aceccccecteees
12
PAG
Pe
IG
«sea
tscrics
preci
cw
a
plata
Ser
ee
aoe
Raed
whe
dered
ee
mos
oink
Ve
Ra
Wea
28~43
Technical
Specifications
.........
0.00.
cee
cece
eect
nesenecensuceseveene
44,
45
LIST OF ILLUSTRATIONS
FIGURE
PAGE
1.
Block
Diagram
of
the
HA1156
«wk
ce
cee
ee
eee
nt
eesneeeeees
4
2.
Front
Panel
Adjustments
Component
Locations
..............ccccecccvcece
14
3.
Main
Chassis
Component
Locations
(Top
View)
..........cccecececcceccces
14
4.
Rear
Panel
Adjustments
and
Component
Locations
............cccececececes
15
5.
Main
Chassis
Component
Locations
(Bottom
View)
...........eccecececccuce
15
G;;
Dial
StHAGING
Guacctind.
deer keds
Muka
wanted
baauestoe
obi
sw
bw
hina
<oideoke
Os
16
7.
FM
Front
End
Assembly
P100
Component
Locations
............20ececeeece
17
8.
AM
Tuner
Assembly
P150
Component
Locations
.............0ccecuceecuees
17
9.
FM
IF
Amplifier
Assembly
P200
Component
Locations
...............00..000-
18
10.
FM
MPX
Stereo
Decoding
Amplifier
P300
Component
Locations
...............
18
11.
Phono
Amplifier
Assembly
P400
Component
Locations
..............0.eceeues
19
12.
Vari-Matrix
Unit
Assembly
P500
Component
Locations
..............cececeeee
19
13.
Dolby
Unit
Assembly
P600
Component
Locations
.............0ccccecceceece
19
14.
Main
Power
Amplifier
Assembly
P700
Component
Locations..................-.
20
15.
Power
Supply
Assembly
P800
Component
Locations
..............0.ccececees
20
16.
FM
Cal,
FM
De-Emphasis
Assembly
PCO1
Component
Locations
...............
21
17.
Tone
Amplifier
Assembly
PD01
Component
Locations
..............0cececues
21
18.
Buffer
&
Pre-Amplifier
Assembly
PEO1
Component
Locations
.................
21
19.
Balance
Control
Unit
Assembly
PGO1
Component
Locations
.................
22