Sansui 5000 A Service Manual

Page 2

CONTENTS

GENERAL TROUBLESHOOTING CHART .................. 3, 4
DISASSEMBLY PROCEDURE .................................... 5
BLOCK DIAGRAM .................................................. 6
CUSTOM MOUNTING .......................................... 7, 8
PARTS LAYOUT ................................................ 9, 10
ALIGNMENT

TEST POINTS .................................................... 11

FM ALIGNMENT PROCEDURE .............................. 12

FM MULTIPLEX ALIGNMENT PROCEDURE ............ 13

AM ALIGNMENT PROCEDURE .............................. 14
THE PROTECTOR CIRCUIT/THE BIAS CURRENT ........ 15
PRINTED CIRCUIT SHEETS AND

PARTS LIST ...... 16, 17, 18, 19, 20, 21, 22, 23, 24, 2-5, 26, 27, 28

OTHER PARTS CHART AND PARTS LIST .............. 29, 30

Page 4

PROGRAM 3 SYMPTOM PROBABLE CAUSE WHAT TO DO
FM reception B. Noise heard like! * Ignition noise caused by * Install the antenna and its lead-in
(contd) Scratch noise"heard starting of an automobile Wire in proper distance from the
engine road or raise the antenna input as
described above
C. Tuning noise between * This results from the nature 2 * Turn the MLlTlNG switch on. it
stations of the PM reception. As reduces the sensitivity, and therefore
the station signal becomes it should be used sparingly
weak, the noise limiter effect
is decreased, and the amplifi-
cation oi the limiter, in turn,
l is enlarged, generating a i
' norse 3
FM-MPX A. Noise heard during * Weaker signal becaus the * install the antenna for maximum
reception FM-MPX reception service area of the FM- antenna input

Record playing
or tape playback

All stereo
programs
l

E

,at midpoint when equal

while not heard during
FM mono reception

B. rCleamess of channel

i . l
separationis decreased

during reception

C. The stereo indicator
blinks on and off

D. The stereo indicator}

1

l
/

i

blinks on and off even 1
though stereo station E

is not received

A. IIum or howling

B Surface noise

BALANCE control is not

sound comes from left and
right' hannels

l
l

MPX broadcast is only half
that of the FM mono broad
cast

* Excess heat

* interference

* Interference

* Record player placed direct,

ly on speaker

" Wire other than shielded
wire used

* Loose terminal contact
*

Shielded wire too close to ?

line cord, fluorescent lamp

or other electrical appli-
ZUCCS

Nearby amateur radio sta»
tion or TV transmrssxon
antenna

Worn or old record
Worn needle
Needle dusty
Improper needle pressure

* it is irnportant to adjust for
equal sound from both
channels.
always be set to the mid-
point

It should not'

as l

at-

Switch on the high filter and/or turn
thfe TREBLE control from midpoint,
is t

Circulation of air is important to the
aux-fining Be sure that air is flowing
er the amplifier
The indicator is not at fault, adjust
VR40K

The indicator is not at fault, adjust
VRioi

Place a cushion between the player
and the speaker box or place them
away from each other

The connecting shielded wire should
be as short as possible

Switch on the LOW FILTER and
adjust the BASS control from mid-
point, left

Consult the nearest Radio Regulatory
Bureau

Recondition the playback head of the
tape recorder or the needle the record
player

Adjust the 'IREBLE control from
midpoint, left

HIGH FILTER on

Set the MONO switch to leNO
and then set the BALANCE control
to a position where equal sound
comes from both channels

__q.~-