Pioneer SA-610 User manual

ff
o'
ll ,r*:('
EefvicecVlanual
STEREO
AMPLIFIER
S \-Ci,lO
()rrroruEErl'

o This
service
manual
is
applicable
to theKUtype.
CONTENTS
I.SPECIFICAT|ONS .......3
2.
FRONTPANELFACILITIES .....4
3.
DISASSEMBLY .... 6
4.PARTSLOCATION ......6
5.BLOCKDIAGRAM ......8
6.
LEVELDIAGRAM .......8
T.CTRCUITDESCRIPTIONS... ...' 9
S.ADJUSTMENTS ......10
9. EXPLODEDVIEWSANDPARTSLIST
. . . . . . . 11
10.
SCHEMATIC
DIAGRAM,
P.C.BOARD
PATTERNS
AND PARTS
LIST
10.1
Miscellanea '.-..'.14
10.2 Schematic
Diagram 15
10.3 P.C.
Board
Connection
Diagram 18
10.4 PartsListof P.C.Board
Assembly 21
11.
PACKING. ......
22
(

r
I
1.
SPECIFICATIONS
Semiconductors
lCs
Transistors 27
Diodes ...... 18
Amplifier Section
Continuous
p0wer
output
of
45watts*
per
chan-
nel,
min.,at
8ohms
from
20Hertz
to 20,000
Hertz
with
no
more
than
0.\3%total
harmonic
distortion.
TotalHarmonic
Distortion
(20
Hertz
to 20,000Hertz,
I ohms,
from
AUX)
22.5watts
per
channel'power
output
.Nomore
than
0.02%
Intermodulation
Distortion
(50
Hertz: 7,000Hertz=4 : 1
8
ohms,from
AUX)
continuous
rated
power
output . . Nomore
than
0.03%
22.5watts
per
channel
power
output
No morethanO.O2%
Damping
Factor
(2OHertz
to 20.000Hertz,
Sohms). . 50
Input(Sensitivity/lmpedance)
PHONO ....2.5mV/50kilohms
TUNER 150mV/50kilohms
AUX. ....150mV/50kilohms
TAPE
PLAY
1
,2 . . 150mV/50
kilohms
Phono
OverloadLevel
(T.H.D.
O.O5o/o,1.000H2)
PHONO 130mV
Output
(Level)
TAPERECl,2.. ... 150mV
Speaker .... A,B,OFF
siA-ci1 cl
Frequency
Response
PHONO
(R
IAA Equalization)
TUNER,
AUX,TAPE
PLAY20Hzto20.000H210.3d8
1.2
. . 1OHzto60,000H2
13dB
ToneControl
BASS. ..t10dB(100H2)
TREBLE ....t10dB(10,000H2)
Subsonic
Filter
. . 15Hz
(-6dB/oct)
LoudnessContour
(Volume
control
setat
-40dB
position)
. . . . +6dB
(100H2),
+3dB
(10,000H2)
HumandNoise
(lHF,
short-circuited,A network)
PHONO . . .82dB
TUNER,AUX,TAPEPLAY
1,2.
., ... IOOdB
Miscellaneous
Power
Requirements AC 120V,60H2
PowerConsumption ...100W(UL)
Dimensions . 42O(Wl
x 94(H)x 347(D)
mm
16-9/16(W)
x
3-11l16(H)
x 13-11/16(D)
in
Weight
(without
package) 6.9kg
(15
lb 3oz)
Furnished
Parts
Operatinglnstructions ........1
NOTE:
Specifications and the design subject to possible modifications
without notice dueto improvements.
* Measured pursuant to the Federal Trade Commission,s Trade
Regulation rule on Power Output Claims for Amplifiers.

2.FRONT
PANELFACILITIES
O POWER
SWITCH
Setthis switchto ON to supply
power
to the amplifier.
There
will bea short
delaywhen
it is
set
to ON.because
the muting circuit has been actuated
to suppress
the
unpleasant
noisethat is sometimes
generated
whenthe
power
isonand
off
.
@ SPCETER
SELECTOR
Usethisselector
to select
the
speaker
system.
OFF: Sound
notobtained
from
speakers.
A: Soundobtained
from speakers connected
to the
A speaker
terminals.
B: Soundobtained
from speakers connected
to the
B
speaker
terminals.
@ BASS
AND
TREBLECONTROLS
Use thesecontrolsto adjust the bass
and the treble.
lf youset
thetone
switchto ONand
turnthebass
control
to right from its centerposition,you will be ableto
emphasizethe sound
in the low-frequency
range.
Con-
versely,turning the bass
control to the left from the
center
position,you
will
attenuate
thesound.
You canuse thetreble controlto adjust
thesound
inthe
high-frequency
range.
@ POWER
METER
This meterallows
you to read
out the rated
power
level
on the fluorescent
display
tube when speakers
with a
nominal impedance
of 8 ohms are connected
to the
ampl
if
ier'sspeaker
terminals.
@ FUNCTTON
INDICATORS
The TUNER, PHONO,TAPE,
AUX functionindicators
light up in accordance
with the position
of thefunction
selector.
@ FUNCTION
SELECTOR
Use
this selector
to select
theprogram
source.
Whenset.
thefunctionindicatorabove
the meter
panel
correspond-
ing
to the
position
of the
function
selector
will lightup.
TUNER: Set
herewhen
listening
to broadcasts
ona
tuner
connected
tothe
TUNER
jacks.
(The
TUNER
functionindicator
lightsup.)
PHONO:
Set herewhen
playing
recordson a turntable
connected
to the
PHONO
jacks.
(The
PHONO
functionindicator
lightsup.)
TAPE1: Set
herewhen
playing
tapesonthetape
deck
connected
to the
TAPE1
jacks.
(The
TAPE
function
indicator
lightsup.)
AUX: Set here
when listening
to a program
source
whichisconnected
tothe
AUXjacks.
(The
AUXfunctionindicator
lights
up.)

r
i
I
iO volurvrE
coNTRoL
Usethis
control
to adjust
theoutputlevel
to the
speakers
and
headphones.
Turn it clockwise
to increase
the
output
level.No
soundwill
beheard
if you
setitto ,,0.,'
@ nCRopHoNE
JAcK
Plug the headphones into this jack when you want to
listen
through your stereoheadphones.
NOTE:
Setthe speaker
selectorto OFF whenlisteningonly with head-
phones.
€) suesoNtc
FTLTER
SWTTCH
When
this
switchis
setto the'l
5Hz
position,
the
subsonic
filter with a cut-off frequency
of 15Hz
is
actuated.
The
subsonic
filter servesto attenuatefrequencies
lower
than
15Hz in a 6dB/oct slope.lt is therefore
effective
in
suppressing
ultra-low-frequency
noise
which is
generated
by record
warp and other causes.You cannot
actually
hearthis noise
but it is a factor in the generation
of
intermodulation
distortion and it may damage
your
speaker
system.
Set this switch to the 1SHzposition
during
record
play
forthebest
effect.
@
rorue
swtrcH
Set
thisswitch
to ON when
adjusting
the bass
and
treble
controls.
When
setto the upper
(OFF)position,
the
tone
control
circuits
aredisengaged
andfrequency
response
is
flat. Thisfunction
isconvenient
for checking
phono
car-
tridge and speaker
tone quality and listening
room
acoustics.
@ powen
tNDtcAToR
When
the power
switch
is
setto ON this lamp
lights
up,
indicating
the
amplif
ieris
turned
on.
sA-Ci1cl
@LouolrrEss
swtrcH
When
listening
to a performance
with the
volume
control
turned down, set this switchto ON and the bass
and
treblewill beaccentuated.
When
thevolume
islow,
the human
earfinds
it harder
to hear
thebass
andtreble
thanwhen
thevolume
ishigh.
The loudness
switchis thusdesigned
to compensatefor
this deficiency.
By settingit to ON, the bass
andtreble
comethrough
much
more
strongly
and
the
soundtakes
on
a
punch
even
when
thevolume
control
is
turned
down.
@
rnpe
2
swrTcH
Set this switch to the ON position when monitoring atape
performance on a tape
deck which you have
connected
to
the TAPE 2 jacks
or whenmonitoring
a recording.
NOTE:
Set the switch to the upper (OFF) position when tistening to
recordsor broadcasts,
etc. selected
by the function selector.
@BalarucE
coNTRoL
Usethis control to balance
the volume
of the left and
right
channels.
lf thesound
appearsto belouder
on the
right,it means
that thevolume
of the right
channel
is
higher.
Turnthe
balancecontrol
to theleft
and
adjust.
Conversely,
if the soundappears
to belouder
ontheleft,
it means
that the volume
of the left channel
is higher.
Therefore,
turn the balance
control to the right and
adjust.
I
I
f'
r
t-

3. DISASSEMBLY
BonnetCase
Removethe four screws
FrontPanel
Remove
the four screws
o.
e.
Bottom Plate
Removethesixscrews
O.
o The !i, marh found on some component parts indicates
the importance of the safety factor of the part. There'
fore, when replacing, be sure to use parts of identical
designation.
4. PARTS LOCATION
Front
PanelView
m
(t .J!g!r.-
Knob
(BALANCEI
AAB.223
Leverknob
(LOUDNESS,
TAPE
2)
AAD.2OO
\o..oo/o' Bonnet case
Front
panel
6

Front View with Front Panel
Removed
Variableresistor
(BASS.
TREBLE)
ACT-127
I Lever
switch (POWER]
ASK.520
Headphones
.jack
AKN-023
Lever
switch
(SUBSONIC,
TONE)
ASK-171
Top View with BonnetRemoved
j Power
transformer
ATT-667
Switchassembly
GWS-215
Headphones
assembly
GWX460
Tone
controlassembly
GWG-138
RearPanel
View
Terminal
{INPUT)
AK8.064
Terminal
(TAPE
1)
AKB-063
'!'tlr
'
rl|r
'l tu "
IVariable
resistor
(
BALANCE)
ACT-130
-Lever switch
(TAPE
2)
siA-610
Fluorescent
indicator
tube
AAV-O06
Slide
rotary switch
(FUNCTION)
ASX-I
13
I o L:---Variable resistor
(VOLUME)
€
ASK.172
Leverswitch ( LOUDN
ESS)
ASK-171
AF amplifier assembly
GWK.144
Switchassembly
GWS-216
Volume assembly
GWX459
I AC
socker
AKP.O32
1i Power code
ADG-023
Streinreliel
AEC-327
Terminal
(SPEAKERS)
AKE-051
f
t-
t
slide rota ry r*i t"tr -------]-=---.'
(SPEAKERS) I" :
ASE-oo3 | ,, ll

5. BLOCKDIAGRAM
swtrcHEs:
st Fu&trox luxEP-M-raPEI-AUX
32 fAPE? ON - 6F
t3 ouoi€ls ox - gll
54 Su6oirt(t5Hrl Ox - 6
55 SPEAXERS O'F-A-'
s6 &s€R ox -!Il
se ioilE or _lI!
6. LEVEL
DIAGRAM
l}.tlJ"roo't xeaipnone
(eo)
AUX/TUNER 15OmV

n7.
CIRCUIT
DESCRIPTIONS
Equalizer
Amplifier
The 54,-610 features a 3-stagedirect-coupled
equalizer amplifier for greater reduction of noise
and distortion.
Besidesthe use of an ultra low-noise transistor
(25C26O2) in the first stage,the adoption of low
impedance input resistance and equalizer circuit
has contributed to an S/N ratio of at least 82dB
(at 2.5mV input, IHF-A).
Power
Amplifier
This all stage direct-coupled pure complemen-
taly SEPP circuit features a current mirror load
differential amplifier in the first stage,and incor-
porates the tone control circuit in the NFB loop.
Although the incorporation of the tone control
circuits in the power amplifier stage reduces the
number of elements that the signal has to pass
through, and thereby further reduces noise, dis-
tortion, and cost, the power stagedoes require a
higher gain and a higher degteeof stability. In the
SA-610, this high gain and high stability are
achieved by a cunent mirror load differential
amplifier in the first stage and by the use of a
constant current circuit for the load of the pre-
driver stage. Furthermore, the tendency for the
pre-driver stage capacitance impedance load to
cause deterioration in the high end frequency
response
is suppressedby inserting a capacitor (C)
between the emitter of the pre-driver stage(Q2)
and the baseof the constant current circuit (Q1) as
shown in Fig. 7-1. At frequencies where the
reactance of this capacitor may be ignored, the
push-pull action of Ql and Q2 serves
to counteract
the high end frequency response
deterioration.
The power amplifier stage is a complementary
2-stage' Darlington connection, resulting in an
output power rating of 45W + 45W (8Q, 20Hz-
2OkHz\, harmonic distortion of less than O.O37o
(20H2 20kHz at rated output), and output
power bandwidth of 5Hz - 50kHz (0.O3% THD).
Certainly a superb performance for an amplifier
of this classis obtained.
/. Constant current
/ circuit
)to o,,u.,..r"n"
\Pre-driver staga
siA-61 cl
Protection Circuit
Besides
protecting the speakers
if a DC voltage
should happen to appear at the power amplifier
stage outputs, this circuit also mutes the signal
path when the power switch is turned on and off
(See
Fig.7-2).
If for any reason a DC voltage (in excessof
about tbV) should happento appear
in the output
of the power amplifier stage,it is detected imme-
diately by either Q23 or q24. qn isturned on by
a positive voltage, and Q24 by anegative
voltage. In
either case,
Q25 is alsoturned off, thereby opening
the relay contact to disconnect
the power amplifier
stage
from the speakers.,
The muting action when the power switch is
turned on is achieved by delaying the rise of the
Q25 base
potential by means
of the R95/C77 time
constant circuit. When the power switch is turned
on, C77 is charged
up via R95, thereby increasing
the voltage across both ends of this capacitor.
When this voltage exceedsthe zener voltage of the
D15 zener diode, Q25 is biased in the forward
direction, and is thereby tumed on to close the
relay contact.
When the power switch is turned off., C77
discharges
rapidly via D18, resulting in Q25 being
turned off, thereby opening the relay contact.
L CH SP OUT
R CH SP OUT
Fig.
7-2 Frotectioncircuit
!f'
rl
I
f,
I
iF
Fig.7-1 Pre-driverstage

8.ADJUSTMENTS
8.1 IDLE
CURRENTADJUSTMENT
1. Set the SPEAKERS selector to the A position,
and connect an 8Q resistor to the speakerout-
put terminals.
2. Turn the VOLUME control down to minimum
level, turn the power on, and wait about 10
minutes.
3. Connect a DC voltmeter to the TP terminals
(Lch; TP4 and TP3, Rch; TP2 and TP1) of the
AF Amplifier Assembly(GWK-144).
4. Check that the voltage between TP4 and TP3
(Lch) lies within the DC 4mV-50mV range
then make a similar checkfor the Rch (between
TP2 and TP1). If the voltage is lessthan 4mV,
cut jumper wire A (Lch), and jumper wire B
(Rch). If the voltage exceeds
70mV, check for
circuit failure.
8.2 OUTPUT
INDICATORADJUSTMENT
1. Set the TONE CONTROL to thecenterposition.
2. Set the SPEAKERS selector to the A position,
and connect an 8O resistorand AC voltmeter to
the speakeroutput terminals.
3. Setthe FUNCTION switch to the AUX position,
and apply a 7kHz, 150mV signalto the AUX
terminals.
4. Adjust the VOLUME control sothat the voltage
on the output terminals (SPEAKERS)read 9V
(AC).
5. Adjust VR1 (Lch) and VR2 (Rch) of the in-
dicator assembly so that the output power
indicator read10 watts.
AF Amplifier
Assembly
(GWK-144)
@
Jumper
wire
A
Jumper
--l @vR2 vR1
F.LMeterAssembly
e
Fig.
8-1 Adjustment
point
10

sA-61 cl
r9. EXPLODED
VIEWSAND PARTSLIST
Exterior
Component
fa
I
f-'
Parts
List
NOTE:
c Parts without part number cannot besupplied.
o The A marh found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, besure to use parts of id.enti-
cal designation.
Key No. Part No. Description
f,
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
ANE.269
ABA-079
AAD.2OO
AN8.847
AAB.222
AAB.223
AAB.221
ABA-186
AB4-066
Bonnet case
Screw
Lever knob
Front panel assembly
Knob
Knob
Knob
Screw
Bottom plate
Screw
.4
.t4
'-:'\
1;r

InteriorComponent
lK'?
um
;l_^s-
il Y'2o 44
29 30
32 34
--
36,2ssl-
ffu..Q
Nf-,
ro '9;i,
w
38

Y
siA-cil o
tt^ Parts
List
Key No. Part No. Description Key No. PartNo. Description
|'^
x-
l\ 1. 4rT-667
2.
3.
4. GWS-215
A s. AsK-s2o
A e. Acc-ool
7. GWX460
8. GWG-I38
9. AWV{07
10.
11.
12. GWS-216
13. GWX-459
14.
15. AEL-320
16.
17.
A rg. AKP-032
19.
Azo. ADG-o23
21. AEC-327
22. AKE-O51
23.
Azc. AEK-Ioo
25. GWK-I44
Power transformer
Wireclip
Frame
Switch assembly
Leverswitch
Capacitor
Headphones
assembly
Tone control assembly
F.L. assembly
Cushion
LED socket
Switch assembly
Volume assembly
Cushionrubber
LED
Panel
stay
Heat
sink
AC socket
Rear
panel
Power code
Strein
relief
Terminal
Terminal
(GND)
Fuse
AF amplifierassembly
26. ASK-I71
27. ASK-172
28. ACT-130
29. AKB-063
30. AKB-064
31.
32. AEC-672
33. ABA-107
34. 484-066
35. ABA-234
36. A84-026
37. M45-O86
38. 871-004
39. ABE-005
40. ABA-240
4't. ABA-198
42.
43. AEC-352
44.
45. AEC-488
46. 2SA1
108/A/Oor R
47. 25C2588/A/OorR
48. ABA-145
Leverswitch
Lever switch
Variableresistor
Terminal
Terminal
Frame
Foot assembly
Screw
Screw
Screw
Screw
1t spacer
Nut 9@
Washer
Screw
Screw
Remotewire
Nylon rivet
P.C.B.holder
Insulator spacer
Transistor
t hfe should
have
the
Transistor
J samerank
Screw
r-
T,
13

1O.
SCHEMATIC
DIAGRAM.P.C.BOARD
PATTERNS
AND
PARTS
LIST
10.1
MISCELLANEA
NOTE:
c When ordering resistors,first conuert resistanceualuesinto code form as
shown in
the following examples.
Ex. 1 When there are 2 effectiue digits (any digit apart from 0), such as 560 ohm
and 47h ohm (tolerance isshown by J = SVo,and K = 10Vo).
56Oa-56x10t-561 ... RDVTPSE@IilJ
47ha-47x103-473 ...' RD|/tPSAABJ
6.Sa-1RS .._ ... RN2H@EEK
ta-010 ... ...8SrP@[0@/(
Ex. 2 When there are 3 effective digits (such as in high precision metal film
resistors).
5.62ha 562 x 10' 5621. . ' . RN7ISrBtr@gm ,F
o The A mark found on sotne component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of
identical designation.
MiscellaneousParts
ASSEMBLIES
Part No. Symbol & Description
GWK-144 AF amplifier
assembly
GWG-138 Tone control assembly
GWS-215 Switchassembly
GWS-216 Switch assembly
GWX459 Volume assembly
GWX460 Headphones
assembly
AWV-007 F.L. assembly
SEMICONDUCTORS
Part No. Symbol & Description
OTHERS
Part No. Symbol & Description
A 4TT-667 T1 Power
transformer
7\ ner-t oo F1 Fuse
ASK-520 SB Leverswitch
(POWER)
A nrpoez ACsocket
Anocozs
ANB-847
AKE451
Power code
Front panelassembly
Terminal
(SPEAKERS)
Listof ChangedPartsfor Factory
Modification
Listof changed
parts
informationwill be
furnished
when-
2sA1108/A/o021,422\ ever necessaryand you are requestedto amend
parts
2sc2s88/i;5 019,o2o
I nte
snoura
have
thesamerank number
inthis
parts
list.
orR .j
AEL.32O D1 LED
CAPACITOR
Part No. Symbol & Description
A ACGOO1 C1 Capacitor 0.01/250V
Symbol Part No. Description

21 3
A
B
10.2
SCHEMATIC
DIAGRAM
l---ot
o': o"t'' (1/2) GW-K-144
f REc l s2:'aPEz- [4Eg (
l:#i 'l
i-iI";+
II |IIp-]]*_|..."::.F
':n I l_UI
l-r'
it---1
@ IIIl'"::'""-#"I$"il|Lry I
i "'o" I E--l I H'l "'
lffil {.i''#,,ffiffii
I too47/25 r 3l i 17 | |
.AUX
l J"'"1i"*,'''rt5i
illlF'-._'*i-'*l
l:;;l 1\Jn*'ffii
l-:::
l{----l ::iHEi-Tf
llll l _H
ll
.l'l llll---.-.
1 ffiNrRoLAss.v(2,2,Gw6.,3a
I
"""-"
it*41+.t_|dr{::::,:^f{..",","u"1*,,oI
||Hl
fdh
| |l,J
L-,=:i *HE-{ l^'- ftzzzu,
llr-
Ll-- - r
II
I
I
I
I
L
SWITCH
ES:
s t,7: FUNCTION TUNER - PHONO
- TAPE I - AUX
SZ:TApE?ON-OFF
53 : LOUDNESS ON - OFF
54 : SUBSONIC
(15
Hz ) ON - OFF
55: SPEAKERS OFF-A-B
56 . POWER ON _ OFF
58 : TONE ON - OFF
Theunderlinedindicatestheswitch
position.
c
D
123

SWITCH
Ass'y GWS
-?15
l--_
I
-l
R5l
2.2k
D3
rs2075
c39
o.ot/
500
- '-^ f c67 27p I
i--T--i
; ??'?t I
---"J"-l Fttr-J
56
u'tt*' SB%,,
'o* l
o.00r2
Rrol
6.2
t
c68
27o
cto to
k!*
l'"
l"F
nea'6zr YFl,i., I
_^.-J?rJ---d
)L Ass'y
(2/21
GWG
-138
I
820(t/2w)
I asE-oo3
t-
2SC19r4A-G
ol 82P
ts2076
c6l roo,/so Q2 HAr20tO
*^^-J ,r.3i.
R92 ilOk R52
RzO lgk RzZ tO C48
az6 2scrass-R "ro
A I orrcezso
0l(POWER)
AIC58
4A- O.OllACtso
T2
ATT-
577
ot7 lt/zwl
A rro oizso
vr aAv-oo6
AF AMP
Ass'y
(2/21
GWK-144 AC
POWER
CORO
aDG-o23
A
I cez'
6.ot
t \
L___ acr25
J

789
.---
F
-l.
__1__fr_
I ll3
i-3
l'.-.lL-J
r* J "JlL_j
|
*r------
ll
l<#ll
]llnt--
ttl
ll_-- l--
--
-
-
_l
d%&;
+48?q-E
rlHl
'/50 I
+l
{At20t0
=-----r
iE
flrl, 'l
flll=
llm.l
illl*llttl.l-
islll'lll.l-
Appearance
2SA912
2SC
1
885
O
rvpe..-fl${
))
a:u
2SA9
79
-
rype""$
u"tru"-*ffii-
il
"o
4[L\
g_l I
R? I
>'2k I
I
-li
l!
ll
ti
2SA985
2SC
2275
trr"-"$
^"7
of Transistors
and f
Cs
2SC1815
A
2SC19144
suffix===O
) ot
No--B^
!ilf-rvpe No
)-n'E h"-]1tt/ 've
/l\
2SC
''
nlg
2SC
2602
,^\
Lot
No-S;a/
n*=-+*LfT-rvpe No
flK
s!\
B
3r!
2SA
11
08A
2SC2588A
Type
*"-__N+\-\,\_\
n,.ffi
ll lt (J- --Lot No
su ll
us
2SC
1
38;
n"-$ii
r-ot
ruo-{Ul+-rvpe No
m
/!\
2sc,::r^
? -- r' p--.--LotNo
ryperuo-{ t-hre
)fr1=--c,.{{i,
il ilu surTrx
I
E
U\
2SD712
\
fr'"ru"-fu
LotNoffin'.
uu\i
T A7';
::
ru
\--===-J
78I
c
D
EiA-61cI
17

10.3
P.C.
BOARD
CONNECTIONDIAGRAM
FLAsr'y(AWV.007I
Lch
Rch
HEADPHONE
Arr'y
(GWX460I
SWITCHAs'y
(cws-216)

EtA-Ci1 cl
HEADPHONE
As'y
(cwx460l
VOLUMEArr'y(GWX459)
2sA11o,AlA/

I
lo
ACl 20V
6OHz
-t
;
t
*
L------_--_J
T1
POWERTFIANSFORMER
SWITCHEO UNSWITCHEO
AFAMP
Ar'y (GWK-1441
CONTROL
Ar'y (GWG-I38)