Nakamichi PA-5, PA-5E Service Manual
~ |
Service Manual |
Nakamichi
Nakamichi
PA-5
PA-5E
Power Amplifier
CONTENTS
1.General ............................. .
2.Parts Location for Electrical Adjustment ................ .
3. Electrical Adjustments. |
. ................................. . |
3.1. Preparation for Adjustment
3.2, Idling Current Adjustment
4.Mechanism Ass'y and Parts List.
4.1. Synthesis
4.2. Front Panel Ass'y (A01)
4.3. Rear Panel Ass'y (A02)
5.Mounting DiagraIJis and Parts List .
5. 1. Clipping LED P.C.B. Ass'y .
5.2. Power LED P.C.B. Ass'y
5. |
3. |
Limiter P.C.B. Ass'y . |
5. |
4. |
Amp. L P.C.B. Ass'y . |
5.5. Amp. R P.C.B. Ass'y .
6.Schematic Diagram
7. |
Wiring Diagram ......................... . |
9 |
8. |
Block Diagram . |
9 |
9. |
Specifications ........................... . |
10 |
1.GENERAL
1.1.Voltage Selector
Voltage selector is installed on the re ax panel for Other version of the Nakamichl PA-5.
This voltage selector can select 110 V, 120 V. 220 V or 240 Vat customer's disposal.
Packing Materials, Owner's Manual and Auxiliary Paxts
0F03904A |
Outer Carton PA-5 |
OF03906A Outer Carton PA-5E |
|
OF03903A Inner Carton PA-5 |
|
OF03905A |
Inner Carton P A-5E |
OF03908A |
Packing |
OD04531A |
Owner's Manual (English) |
OD04530A |
Owner's Manual (English/German/French) |
OB90137A |
Power Cord PA-5 (U.S.A. & Others) |
OB90189A |
PowerCordPA-5 (Australia) |
OB90138A |
Power Cord P A-5E (Europe) |
OB90154A |
Power Cord P A-5E (Switzerland) |
OB90140A |
Power Cord P A-5E (UK) |
OF08887A |
PowHCordBand |
OB90164A |
Fuse SA PA-5 (U.S.A., Canada & Others) |
OB90166A |
Fuse T2.5A P A-5 (Australia) & PA-5E |
2.PARTS LOCATION FOR ELECTRICAL ADJUSTMENT
Fig. 2
3.ELECTRICAL ADJUSTMENTS
S.1. Prepazation for Adjustment
(1)Insert.shortingpinsintothelnputJacks.
(2)Remove loads of the SPeaker terminals.
(3)Before starting adjustment, allow twenty minutes or more after power is turned ON, In this case, the Tape Cover must be installed,
3.2.Idline; Cuxrent Ad)ustment
(1)Connect a DC voltmeter between TP101 and TP102 (TP201 and TP202) on the Amp. L (R) P.C.B. Ass'y.
(2)Adjust VR102 (VR202) to obtain 40 mV on the DC volt•
meter(idlingcurrent: 40mA).
(8) Remove shorting pins from the Input Jacks.
4.MECHANISM ASS'Y AND PARTS LIST
Schematic
Ref.No.
°'
g1
05
06
07
g~
t~
"
"
ti
t~
"
~~
"
"
~t
"27
"
ii
31
~i
LOl
L°'
L03
L04 LOO tg~
L08
t~i
tu
L>e
L14
L15
L16
L17
HA04920A
HA04921A
BA05688A
BA05687A
OJ05097A
OB71004A
OJ05095A
BA05897A
OH047f>9A
OJ05096A
I OH04768A
jgrg0;Yi~0£
OJ05108A
BA05968A
OH04752A
OJ05094A
OJ05098A
OB12258A
OB50061A
0B50068A
OB50062A
OH04765A 8ir°o54\0si1. OH04764A OH04762A OJ05100A OJ05102A BA05969A OM04377B HA04926A HA04923A HA04924A HA04925A HA04954A OB70049A OB08515A OE00921A
OE00868A
g~gg:~~~
OE00970A
OE00888A
OE03290A
OE03030A
OE00713A
OE03323A
OE03287A
iOE03335A
Ig~gg~~~~
OE03386A
OE00594A
OE00818A
OE00752A
Description
Synthesis
Serla\No.: B20701001-
FrontPanelAss'y PA-5
Front Panel Ass'y P A-5E
Clipping LED P .C.B, Ass'y
Power LED P.C.B. Ass'y
Front Chassis
Power Switch
Cushion A
LirniterP.C.B, Ass'y PA-5
(U.S.A. & Canada)
Limiter P.C.B. Ass'y P A-5
(Australia & Others) & P A-5E
HeatSinkLl!'
CushionB
SideCoverL
Heat Sink LR
Upper Channel L
Lower Channel L
P.C.B.Holder
Amp, L P.C.B. Ass'y
I Top Cover
1 CushionC
i~rz~~~a;: 15G4B41
PowerTransfonnerPA-5
(U.S.A. & Canada)
Power Transformer P A-5 (Others) Power Transformer PA·5
(Australia) & P A·5E Electrolytic Capacitor
47000µF80V Bottom Chassis
L••
Heat Sink RF
SideCoverR
Heat Sink RR Lower Channel R Upper Channel R Amp. R P.C,B. Ass'y Caution Label
RearPaliel Ass'y PA-5 (U.S.A.) Rear Panel Ass'y PA-5 (Others) Rear Panel Ass'y PA-5 (Australia) Rear Panel Ass'y PA-5E
Rear Panel Ass'Y PA-5 (Canada) VoltageSclectorPA-5 (Others)
ilnsu-Lock BT3x8 ©Bmdi.ng
(BlaekChromate)
BT3x8©Binding
BT3x6EllBinding
M3x6EllBinding
M3x4 Ell Binding (Blaek Chromate) BT3xl2tllBinding
M4x15 ©Binding (Bronze) M3x6EllBinding(Nickel) M3x6tllTruss(Bronze)
M4x8 Ell Binding (Gold Plated) M4x6 e Binding (Gold Plated) M5x6 ED Binding (Black Clu:omate)
IM4x4 Ell Binding (Black Chromate)
BT4x12Elll3inding
, Nut(~1.~~~~~r('Sfa~t>Chromate)
!~~~: :~~::~:i~~~hromate)
IEy!ef2~~0pt~~5'ibanada)
Sehematic |
|
Description |
Ref.No. |
|
|
|
HA04920A |
Front Panel Ass'Y P A-5 |
|
HA04921A |
Front Panel Ass'Y PA·SE |
|
|
Serial.No.: B20701001· |
|
OH04754A |
Sub Front Panel |
|
OH04651A |
Lens A |
|
OH04753A |
Front Panel P A-5 |
|
OH04766A |
·Front Panel PA-5E |
|
HA04849A |
Power Switch Knob Ass'y |
|
OJ05000B |
PowerSwitehSpring |
|
OH04652B |
Power Switch Guide |
|
OH04653B |
Lens B |
|
OE00866A |
M2.6x4 tll Binding |
|
|
|
|
|
|
|
|
|
4 •2 • Front Panel Ash(AOl)
Fi&,4.,2
r....
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