Dual 1225 Service Manual

Page 2

fig. 1 Pick-up Connection Diagram
right channel
P\ r""'-"'I
I T"1 IN-.. l---C
- l l-I 31. { _.__4'° I
' J---" :___.I' '
v '- i..L« ---
/" l l
I I | I
\o ' I
H»- p ,1
"o---- -d
i. ?.
l I :
'. l l

__-_-.-___--___1ii"fff1°f_s__9_1_ -l

$ :3--

lett channel

-_--_1 ,1

--1 .-~'I ""r l

, white } :<::. :----| I :

I I --L----::I Lon-.1 '

\4| 4
h

I

'- l'onoarm audio cable

\

l

L.____-.-q-

right channel
red lead 0
5240
left channel 3 1
white lead

f-- ----"--- ""- --1
h----

b) with phone plug

- ------------- --------T' 5 Rafi-J (rad)
I : II I I I
I I black
I | I I '
l l I l
I H. | I
right channel | : 1 :_L left channel
red I ; : : : white
I l |
-Mass right channel ' I ' I I Mass left channel
green I I : I l blue
: : l l 1
l I l | l
I I l l
: ; I I '
I l i : I
01 ' l : 02
Mass sheet ' { ILI L J
C) U .I:::Z::ZZZ:3
I- _ _ _ __ _, _. ______ 1
-.-.'.'.-.- I
Contact plate at tonearm head I Tonoarm head
I
r-.. .. __ .. __.1 I Spring contacts between
1/2 I I plugdn cartridge
Cartridge-holder I I l I head and tonmrm
- - _ -- I
red I : white
I q
0
green | I blue
% I
Cartrldgc L____ _____J

Inner side of groove
left channel

outer side of groove
right channel

a) with miniature plug 5-pin

white
Ivel low)

Page 10

Moving the Operating switch (33) also re-
leases the start level {208) which is pul-
led towards the main cam by means of ten-
sion sprin (207). By this means the shut-
off lever (190) is mouad within the range
of the dog on the platter pinion thus dri-
ving the main cam. The change lever (209)
is also looked. To prevent malfunctions the
operating auitch is locked in position du-
rin the start cycle (rotation of the main
cem?. Just before the main cam roaches neu-
tral position (at the end of the change cy-
cle) the start lever is pushed clear by the
main cam and thus the operating suitch and
change lever are returned to their original
positions. After installation and after me-
ving the changer the unit should be started
H g with the tonearm locked on the rest. This

'* will automatically readjust the shut-off
lever uhich may have shifted out of posi-
tion.

Manual Start

when the
the pawl
gages on
chassis,
position

tonearm is swung inwards by hand
(202) on the shift arm (180) an-
a square and pin Fitted in the
retaining the shift arm in this
and thus the idler wheel 1152)

in engagement with the platter.

The slide (177) linked to the shift arm
actuates the pouer switch and sets the plat-
ter in motion.

Dn reaching the run-out groove the tonearm
automatically returns to its rest position
and the unit shuts itself off. If, however,
the tonearm is lifted off the record before
completion of play and returned to the rest,
the in of segment (2&5) releases the peel
(202 . The tension spring then returns the
shift arm to its initial position, opening
the power switch and disengaging the idler
wheel.

Fig. 15 Noting Switch

Cam wheel at zero:
Contacts of muting switch opened

Cam wheel is turning:
Contacts of muting switch is closed

[:5

o -

.I" '0
.n- .o- .
.uv

Stoo Switching

when the operating lever is moved to "step"
only the starting lever (208) is drawn For-
ward. As a result, the shut-off linkage an-
gages with the main cam. The cam follower
lever remains in step position. when the
tonearm is on its rest and the operating le-
ver is pushed to "step", the change lever

must not jam.

1O

Page 22

Dual Geerder Steldlnger -7742 St. GeorgenISchwarzwald

920 149 5 53674 Uruct: Hand Fostec. thlinoon Prinlod m Gmmbfly