Nippon Denon PMA-232 User manual

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Hi-Fi
Component
/
Amplifier
SERVICE
MANUAL
MODEL
PMA-232
SOLID
STATE
STEREO
INTEGRATED
AMPLIFIER
NIPPON
COLUMBIA
CO,
LTD.

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TABLE OF CONTENTS
SPECIFICATIONS
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1
DISASSEMBLY
INSTRUCTIONS
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2
PRINTED CIRCUIT BOARD
PATTERNS AND PARTS LIST
“whe wey WE Ls iat! li wtets ~
~ ABW/45W (load, 8 ohms) at T.H.D. 0.1%
(Each channel driven): 62 W/62W (load, 4 ohms) at T.H.D.0.1%
Rated output power: 38W + 28W (load, 8 ohms) at T.H.D. 0.1%
(Both channel driven): 47W + 47W (load, 4 ohms) at T.H.D. 0.1%
Lower than T.H.D. 0.1% (at 8 Watts
and 20Hz to 20KHz)
Rated output power:
Tone control:
Harmonic
distortion:
Low
filter
cutoff
_ frequency:
Cross modulation
distortion: Lower than 0.1% (at equivalent sign Power requirement:
wave rated output)
20H2z
—
30KHz
(at
T.H.D.
0.3%)
Power
consumption:
. Dimensions:
Input sensitivity/input ‘Weight:
impedance: (at 1KHz) PHONO: 2.2mV r.m.s. 50K ohms +10%
| TUNER: 14.0mV ¢.m.s. 80K ohms *i3%
AUX: 14.0mV ¢.m.s. 80K ohms 4).
Maximum allowable: PHONO: More than 200mVr.m.s. (1K Hz)
Input level: |
ETC-104
MUTING
CONTROL
UNIT
PARTS
LIST
sss
CHASSIS
&
CABINET
GROUP
PARTS
LIST
ADJUSTMENTS
AND
MEASUREMENT
PROCEDURES
----
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0000 80000006 OSe COSC OCS ESOS STE SESE ST SESS EEOSESOESESSSESOH HESS TOS ELOR
oOo oO N NN
+0.4dB (at 20Hz — 20KHz, Rec out)
20Hz — SOKHz + 1 dB at TONE ee
ETC-S9B EQUALIZER, TONE AMP UNIT crrereessesereeeeeee- 3 WIRING DIAGRAM
ETC-85D POWER AMP PROTECTOR &
POWER SOURCE UNIT __ cseerescssssosesescssesssessarsstseenenessncenereeees 5
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s
Type: All silicon transistor stereo pre-main Equalizing characteristic,
amplifier RIAA deviation:
POWER AMPLIFIER & PRE AMPLIFIER SECTION TONE CONTROL SECTION
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BASS:
+7.5dB, —5.0dB at 100Hz
TREBLE: +7.5dB, —5.0dB at 10K Hz
15Hz (—12.3dB)
AC 220/240V changeable, 50Hz,
120V 60Hz (For USA, Canada)
250W
396mm (W) x 147mm (H) x 281mm (D)
9 Kg
32

6
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DISASSEMBLY
INSTRUCTIONS
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= PMA-232 am
PRINTED
CIRCUIT
BOARD
PATTERNS
AND
PARTS
LIST
(The
board
diagram
represents
the
view
from
the
copper
foil
side)
-ETC-99B
EQUALIZER,
TONE
AMP
UNIT
denies
—s
i
.é.
tf...
a.
:
ETC-998
EQUALIZER,
TONE
AMP
PARTS
LIST
Part
Name
Description
C1,2,53,54
C34
oo
7,8,9,10
3132
C11,12,49,50
C15,16
C17,18
C19,20
C2151
C22
C23,24,25 26
C27,28 61,62
C29,30
C3334
(C€37.38.41 42
C39,40
C4344
C45,46,47,48
C52
C55
C6364
C65
C35,36
R12
R3,4,45.46
57,58,123
124
R5,6
R7,8
R3,10
Rit 12,101,102
R13,14,35,36
R15,16..
R17,18,59,60
R19,20,71,72
R21,22
R23,24 129
130
~R25,26
R27,28 49,50
2544024016
2533631012
2544004010
2541031002
2551129001
2551128031
2544059010
2544059023
2551129027
2541027003
2533635018
2544011016
2551130032
2551128002
2551128086
2544035018
2544015012
2544053007
| 2541020000
2544028012 ©
2544045011
2410363005
2410314009
| 2412016004
2410321005
2412016017
2410316007
2410298002
2410313000
2410315008
2410344008
2410326000
2410362006
2410286001
2410370001
CEQ4W1E4R7=F
CC45SLIH151JF
- CE04WOJ330=F
CEO4W0J221=F
CS45E1V2R2M
CO93M1H682JF
CQ93M1H182JF
CEOQ4W1J221=
CEO4W1J470=
CQ93M1H273JF
CS45E1VR47M
CC45SL1H221JF
CEO4W1A221=F
CQ93M1H823JF
CQ93M1H102JF
CQ93M1H472J5F -
CEO4W1V100=F
CE04W1C100=F
CEO4W1J101=
CS45E1E010M
CE04W13101=F
CEQ4W1H3R3=F
RD14B2E114J
RD14B2E102J
| RDT4B2E104JNL
RO14B2E202J
~ RDI4B2E154JNL
RD14B2E122J
RD14B2E2215
RD14B2E911J
RD14B2E112J
RD14B2E1835
-RD14B82E332J
RD14B2E104J
RD14B2E6805 ©
RD14B2E2245
4.7uF
1SOPF +5%
33uF
| 68PF° --+5%
220uF
2.2uF +20%
0.0068uF +5%
0.0018uF +5%
220uF
47uF
Q0.027uF 25%
O.47uF 2 +20%
Z20PF +5%
| 220uF
0.082uF +5%
Q0.001uF +5%
0.0047uF +5%
10uF
10uF
1O00uF
1uF
100uF
3.3uF
1/4W 110Kohm
1/4W 1Kohm
1/4W 100Kohm
1/4W 2Kohm
1/4W 150Kohm
1/4W 220 Ohm
1/4W 220 Ohm
1/4W 3910 Ohm
1/4W 18Ko0ohm
1/4W 3.3KOhm
1/4W 100Kohm
1/4W 68 Ohm
1/4W 220Kohm
Electrolytic Capacitor
Ceramic Capacitor
Electrolytic Capacitor _
Ceramic
Capacitor.
SER
BSE
ss
se
SBS
eget
a
gk
LONE
LAS
BRS
ON
RS
Ale
es
Le
ey
Electrolytic Capacitor
Solid Tantalum Capacitor
Plastic Film Capacitor
Electrolytic Capacitor
Plastic Film Capacitor
Solid Tantalum Capacitor
Ceramic Capacitor
Electrolytic Capacitor
Carbon Film Resistor
“et
Electrolytic Capacitor
ae
Solid Tantalum Capacitor
Electrolytic Capacitor
#
Carbon Film Resistor

Cancer
[te
R29,30
-R31,32,33,34
R37
,93,94
R38
R39,40
R43,44,47,48
R51 ,63,64
105,106
R52
R53,54
R55,56 -
R61,62_
R65 ,66,67,
68,109,110
R69,70
—
R73,74,75,76
R77,78
R79 ,80,87,88.
R81 ,82,85,86
R84,83,132
R89,91 ,92,97,98
R95,96
R99,100
R103,104
R107
R121,122
R125,126
R127,128
R131
TR1,2,3,4
7,8,11,12
1 TRS6
TR21,22
$1
$2
$3
VR2
2410372009
2410345007
2410338001
241029000
2420193016
2410365003
2410378003
2410352003
| 2410341001
2410302008
2410312001
2410342000
2410335004
2420203016
2410360008
2410339000
2410343009
2410354001
2410330009
32410331008
"2410253018
2410334005
2440033017
2420195014
2410374007
2410336003
2410346006
2730158013
2730
ZERGOT UK
2730158013
2120062007
2120064005
2120063006
2110092003
EP-S6671H
2220235006
161000
RD14B2E2745
RD1482E2035
RD14B2E103J
RD1482E1015
RCOSGF2E155KF
RO14B2E1345
RD14B82E4745
RD14B2E393J
RO14B2E133J
RD14B2E331J
RD14B2E821J
RD14B2E153J
RD14B2E752J
RCOSGF2E106KF
RD14B2E823J
—-RO14B2E113J
RD14B2E163J
ROD14B2E473J
RD14B2E4725
RD14B2E512J
RD14B2H6845 F
RD14B2E6825
RS14B3A221JNBF
RCOSGF2E225KF
RD14B2E3345
RO14B2E822J
RD14B2E2235
2SC1775(F)
2SC1212AWT (B)
“2
[|
2SA743A(B)
+
oe
ot
aad
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Function
Switch
Treble Switch
Base Switch
V2422P25RZ254K
Terminal
Printed Circuit Board
1/4W
270Kohm
+5%
1/4W
20Kohm
+5%
1/4W
10Kohm
+5%
1/4W
100
Ohm
+5%
1/2W
1.5Mohm
+10%
1/4W
130Kohm
=
-.+5%
1/4W
470Kohm
+5%
1/4W
39Kohm
+5%
1/4W
13Kohm
+5%
1/4W
330
Ohm
+5%
1/4W
820
Ohm
+5%
1/4W
15Kohm
+5%
1/4W
7.5KOhm
=
+5%
1/2W
10Mohm
+10%
1/4W
82Kohm
+5%
1/4W
11Kohm
+5%
1/4W
16Kohm
+5%
1/4W
47Kohm
+5%
1/4W
4.7Kohm
+5%
1/4W
5.1Kohm
+5%
1/2W
680Kohm
+5%
1/4W
6.8Koym
+5%
41W
220
Ohm
+5%
1/4W
2.2Mohm
+10%
1/4W
330Kohm
+5%
1/4W
8.2Kohm
+5%
1/4W
22Kohm
+5%
Transistor
For
Balance
Volume
Description
“>
Carbon
Film
Resistor
ee
~
Carbon
Composite
Resistor
Carbon
Film
Resistor
Metal
Oxide
Resistor
Carbom
Composite
Resistor
Carbon
Film
Resistor
oe
ne

ETC-85D
POWER
AMP
PROTECTOR
&
POWER
SOURCE
UNiT
Cle?
C3.4
|
C910
Cit 412
C1314
C15.16
C17.1823
C19 20
C2122
C51,52
C53.55
C54
C56
C5758
C81
C82
C83
C84
C85
C86
R1.2,.19.20
R3.4
R56
R7.8
R910
R1142
R13.14
R15,16.83
R17,18.25
26 27,28
R21.22
R23,24
R23,30 31
32
R33,34
R51~58
RSQ
R60,69 71.72
2544044012
293362301 7
2544003011
NON
2533621019
2544051018
2544039001
2533595019
2544046010
2551130045
2531026014
NON
2531021019
2549005030
2531050019
2544006018
2531053016
2544063019
2531002012
2544063006
2544053003
2544026001
2410314012
2410360011
2410347018
2410320019
2410336016
2410317019
NON
2410346019
2410290013
2442001021
2440096012
2430023008
2440129015
NON
2410342013
2410338014
CEO4W1HO10=f
CC45SL1H680JF
_CEO4W0J101=F
CC45SL1H560JF
CE04W1H221=F
CEO4W1V221=
CC45SL1HO20CF
CEO4W1H4R7=F
CO93M1H104JF
CK4SF1H4732F
CK45F1TH102ZF
CE04=1E1O0QMHS
CK45E2H102PF
CEQ4WO0J471=F
CK45E2H103PF
CEO4W1K221=
CK45B1H471KF
CEQ4W1K101=
CEO4W1H471=
CEO4W1E330=
RD1I4B2E102J)F
RO14B2E8235F
RD14B2E243JF
RO1I4B2E182JF
RDT4B2E8225F
RD14B2E132J5F
RD14B2E223J5F
RD14B2E101JF
RS14B3A242JNBF |
RS14B3D681JNBF -
RW99=3F R47)
RS14B3F 100JNBF
"RD14B2E153JF
RD14B2E103J5F
BBPF + 5%
TOQQuF
560PF
220uF
220uUF
2PE #5: 25PF
4.7uF
O.1GF +5%
0.047uUF
0.001uF
1OuF
0.001UF
470uF
O.01uF
220uUF
470PF
1OOuF
470uF
33uF
1/4W 1Kohm
1/4W 82Kohm
1/AW 24Kohm
1/4W 1.8Kohm
1/4W 8.2Kohm
1/4W 1.3Kohm
T/4W 22Kohm
1/4W 100 Ohm
TW2.4Kohm
ZW = 680 Ohm
3.15W 0.47 Ohm
3.15W 10 Ohm
1/4W 1SKohm
1/4W 10Kohm
SOV
50V
63V
50V
50V
JOM.
90 V
o0V.
SOV
Electrolytic.Capacitor
Ceramic Capacitor
Electrolytic Capaciter ~
Ceramic Capacitor
Electralytic Capacitor
Ceramic Capacitor
Electrolytic Capacitor
Plastic Film Capacitor
Ceramic Capacitor
Electrolytic Capacitor
Ceramic Capacitor
Electrolytic Capacitor
Ceramic Capacitor
Electrolytic Capacitor
Ceramic Capacitor
Electrolytic Capacitor
Fr
et
Carbon Film Resistor
Metal Oxide Film Resistor
Wire waund Resistor
Metal Oxide Film Resistor
Carbon Film Resistor
rt

ce ewe ow eee nme ee eee
ee
R61
R62
R63
R64
R65
R66
R67
R68
R70
R73
R74,75
R81
R82
R84
R85
R86
R90
VR1,2
VR3,4
TR1,2,3,4
TR5,6
TR7,8,54,81
TR9,10
TR11,12
TR13,14
TR51,52
TR53
TR56,82
TR57
TRS8
D1,2
at
jaar
eS
03,4
ce
atc
DS,6
E55,56,57,58
085 86
087
F81 82
oe
NON
2410354014
2410276011
2410255016
2410376018
NON
2410257014
2410332010
2440034016
2410330012
2440090018
EP-6975
2440098010
2410298015
2410378016
2442003029
2410338001
EP-546211H
EP-54625H
2730158026
2710072009
2730161000
2710071000
2740040001
2720027002
NON
2710040057
2730158013
2730116039
2730162009
2760155028
2760001004
2760057016
2760067006
EP-71329
EP-5870
4170045001
EP-6071
2034025004
2036026001
4150065001
2220204202
““ZIGO1S6027—
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RD14B2E473JF
RD14B2E270JF
RD14B2H824JF
RD14B2E294JF
RO14B2H105JF
RD14B2E562JF
RS14B3A27
1JNBF
RO14B2E472J5F
RS14B3D221JNBF
Fuseble
Resistor
RS14B30102JNBF
RD14B2E221JF
RD14B2E474JF
RS14B30511JNB
RD14B2E103J
Solid
Volume
2801775
(E)
2SA850(D)
2$C1212AWT(B)
2SA743A(B)
2S$0581(B)
2S$B611(B)
2SA673A (C)
2SC1775(F)
2SC1345(D)
2SC1775A(F)
VD1122
_ STV-3BHIO) og:
“yp1222,0~CO*~‘“
1N34A
VO6C
AWO01-15
Fuse 4A (Time Lug)
Fuse Holder
Radiator
Insulating Sheet
Base Pin
3P
Connector
(B)
plug
4P
Connector
(B)
Plug
Holder
Printed
Circuit
Board
Po
1/4W
47Kohm
+5%
1/4W
27
Ohms
+5%
a
1/2W
820Kohm
+5%
“
1/4W
390Kohm
+5%
-
1/2W
1Mohm
+5%
?
ve
1/4W
5.6KOhm
+5%
“
Metal
Oxide
Film
Resistor
Carbon
Film
Resistor
Metal
Oxide
Film
Resistor
iW
270
Ohm
+5%
1/4W
4.7Kohm
+5%
IN
220
Ohm
+5%
2.2
Ohm
2wW
1Kohm
1/4W
220
Ohm
+5%
1/4W
470Kohm
+5%
2w
510
Ohm
+5%
1/4W
10Kohm
+5%
+5%
Metal
Oxide
Film
Resistor
Carbon
Film
Resistor
Carbon
Film
Resistor
Metal
Oxide
Film
Resistor
Carbon
Film
Resistor
4.7Kohm
Variable
Resistor
470
Ohm
Variable
Resistor
Transistor
Transistor
(Out
Put
Power)
Transistor
(Out
Put
Power)
Transistor
Varistor
rape
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CR
Le
ae
neg
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CERES
Rate
ASAE
ERSTE
SST
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eae
saabnc
i
ane
aa
a.
Diode
Diode
Zenner Diode
For
“+B”
“—B”
Fuse
For
TR11,12,13,
and
14
For
TR11,12,13,
and
14
|
For
P.C.
Board
Holder
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ae! ROEM RE
6
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1 Ba BEDS Ss as REL EE Bp ELBE LOS AREY SEARLES AD, RE RTS ETE te SES

PMA-232 mm
ETC-104 MUTING CONTROL PARTS LIST
2220282004
2551114003
CQ93M2D473M
0.047
uF
200V
+50%
2410360008
ROD14B2E823J
1/4W
3=82Kohm
+5%
~~
Carbon
Film
Resistor
2410365003
ROD14B2E134J
1/4W
130Kohm
+5%
“
2760057016
VO6C
.
Diode
EP-5667H Terminal
Printed Circuit Board
GE-4003-1 PES & CABINET GROUP
4
Ref. No.
C1,2,3
~T'39300170
2546011001
2120060009
2124048001
a
2110118000
EP-71141
2048015107
2090012006
2020012005
2061015058
2062002002
2062009005
2034059038
2034069028
2030079009
2030076028
2030072035
2030070079
2335023103
1440165106
1120091202
1120091016
1130065105
1160004000
1020032002
4110104203
2518001007
2124047002
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Slide Switch
V2420N30KR254
Push Terminal!
4P Wrapping Pin Jack
6P Wrapping Pin Jack
Short Pin
Earth Terminal!
Fuse Holder
Fuse 1.6A (Time Lag)
AC Cord with Plug
AC Cord with Plug
3P Connector Cord
3P Connector Cord
1P Connector Ass‘’y
1P Connector (A) Ass’y
1P Connector (A) Ass‘’y
1P Connector Ass’y
Power Trans Ass‘y
Front Panel Ass’y
Knob
Knob
Knob
Knob Sheet
Top Cover
Main Chassis Ass’y
O.0i1uF +20% 450VAC
68000uF SOV
For Power on off Switch
For Voltage Selector Switch
Oil Capacitor
Electrolytic Capacitor
Speaker
Switch
For
Speaker
Switch
Slide
Switch
For
Tape
Monitor
Switch
:
;
For
Filter
Switch
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For Main Volume
For Speaker Connecting Terminal
For Tape Jack
For Phono, Aux, Tuner Input Jack
For Tape P8 Short Pin
For Gad. Terminal
For AC Line Fuse Holder
For AC Line Fuse
For Europe
For Australia
For
Connection
Cord
From
ETC-85
To
Head
Phono
For Connection Cord
For
Connection
Cord
From
SP
SW
To
ETC-85
For
Connection
Cord
From
Earth
to
ETC-85
For
Connection
Cord
From
SP
SW
To
ETC-85
For
Connection
Cord
From
Earth
To
ETC-85
For Main Volume
For
Function,
Balance,
Bass,
Treble
and
Speaker
For
Power,
Low
Filter
and
Monitor
Switch

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_—_—_—
ADJUSTMENTS
AND
MEASUREMENTS
PROCEDURES
INSTRUCTIONS
FOR
ADJUSTING
MIDPOINT
ELECTRIC
POTENTIAL
AND
IDLING
ELECTRIC
CURRENT
OF
POWER
AMP...
IER
UNIT.
7
|
To
ensure
accurate
adjustment
of
the
midpoint
C.
For
adjusting
midpoint
voltage,
turn
the
VR-1
electric
potential
and
idling
electric
current
of
the
(4.7
Kohm)
so
that
voltage
reading
on
the
DC
PMA-232
Power
Amplifier
Unit
(ETC-85),
and
voltmeter
(V)
becomes
O
(zero):
V=0.
The
adjustment
should
be
performed
in
the
manner
in-
condition
is
abnormal
if
the
value
exceeds
100
dicated
below:
mV.
-D.
Following
adjustment
of
the
midpoint
voltage
1.
MEASURING
INSTRUMENTS
potential,
adjust
the
idling
electric
current
to
45
A‘
DC
Voltmeter
(200mvV)
mA
on
the
DC
ammeter
by
rotating
the
VR-2
8.
OC
Ammeter
(100mA)
(470
ohm).
1=45mA.
Note:
One
each
of
the
above
mentioned
instru-
Lock
it
with
paint
after
adjustment
is
completed.
ments
will
suffice
if
a
test
is
conducted
on
only
one
channel
at
a
time.
SPEAKER TERMINALS
2. CONNECTION,
A.
Connect
one
DC
voltmeter
to
the
left
and
one
to
the
right
channel
of
the
SPEAKER
termi-
nals.
(See
Fig.
18)
B.
Remove
the
plug
(red
wire)
from
the
No.
1
terminal
(+B)
of
the
Power
Amplifier
Unit
(ETC-85)
and
connect
the
DC
ammeter
to
each
channel.
(See
Fig.
19)
Esesenie3,
-
PROCEDURES
Seat
aunt
WEE
RE
eke
Sa
Ee
Sects
=
a)
eee
A.
Set
the
power
supply
at
pre-set
voltages
of
the
PMA-232
(AC
220/240V:50Hz,
120V
(FOR
Fig.
1
USA,
CANADA)
8.
Wait
three
minutes
after
Power
switch
is
ON.
POWER
TRANSISTOR
POWER
| TRANSISTOR
DC AMMETER
Fig. 2
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MODEL
PMA-232
WIRING
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2—PHONO
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VALUES
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AND
CURRENTS
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MEASURED
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CONDITION.
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