Sansui Eight Deluxe Service Manual

Page 2

EIGHT-DELUXE

This service manual is designed for service engineers to repair,

adjust, maintain and order the replacement parts of the EIGHT-DELUXE
correctly.

When ordering the parts, use the stock number and parts name speci-
fically referring to the Parts Locations & Parts List.

For general usage and maintenance of the unit, please refer to the
Operating Instructions attached with the unit.

TABLE OF CONTENTS

Section Title Page
1. SPECIFICATIONS .............................................. 2
2. BLOCK DIAGRAM AND LEVEL DIAGRAM 3

2-1. Block Diagram ............................ 3

2-2. Level Diagram ............................ 4

3. ALIGNMENTS AND ADJUSTMENTS .......... 5

3-1. Driver Circuit Board Adjustment .............. 5

3-2. FM IF Alignment ........................................ 5. 6

3-3. FM Dial Calibration and RF Alignment ...................... 6
3-4. FM Signal Meter, Mono Distortion, Tune Meter and Muting

Adjustment .............................................. 7

3-5. MPX Alignment .......................................... 7, 8

3-6. AM IF Dial Calibration, RF and Signal Meter Alignment ...... 9

4. THREADING 0F DIAL CORD .................................. 11

5. TROUBLESHOOTING CHART ....................... 12

5-1. Troubleshooting on Power Supply Section N ........ 12

5-2. Troubleshooting on Audio Section ......... .12, 13, 14

5-3. Troubleshooting on RF Section ................. ...14, 15

6. PARTS LOCATIONS AND PARTS LIST ................. 16

6-1. F-1419A FM IF Circuit Board ..................... ...16, 17

6-2. F-1261C FM MPX Circuit Board ..................... ..18, 19

6-3. F-1417D AM Circuit Board .................. .20, 21

6-4. F-1472 Equalizer Circuit Board .. 21, 22

6-5. Special Parts List in FM Frontend ....... . . ....... 22

6-6. F-1476 Accessory Switch Circuit Board ...................... 22

6-7. F-1477 Accessory Switch Circuit Board ...................... 22

6-8. F-1473 Tone Control Circuit Board ............... 23

6-9. F-I474 Driver Circuit Board ............. 24, 25

6-10. F-1475 Protector Circuit Board ........ . . . . . . 25, 26

6-11. F-1201A Power Supply Circuit Board ........................ 26

6-12. Other Parts (Front Side) .................................... 27

6-12-1. Section-1 ............ .. .27. 28

6-12-2. Section-2 ....... H . . H ..... 29

6-13. Other Parts (Top Side) .. . ..... 30

6-14. Other Parts (Bottom Side) .............................. 30, 31

7. PACKING LIST ................................................ 31

8. ACCESSORY PARTS LIST ......... 31

9. MAINTENANCE .............................................. 31

9-1. Voltage Adjustment ........................................ 31

10. SCHEMATIC DIAGRAM 0F TUNER SECTION .................. 32

11. SCHEMATIC DIAGRAM OF AUDIO SECTION .................. 33

12. REPLACEMENT 0F MAIN PARTS ... 34

12-1. Tuner Section ............................................ 34

I)

Page 10

EIGHT-DELUXE

3-6. AM IF, Dial Calibration, RF and Signal Meter Alignment
(See Figs. 3- 5, 3-6 and 3-7 on page 10)

.AM GEN E_SCOPE

Note: 1. Selector ..........
. Master Volume ,. . .Minimum
. Confirm start point 0 ml pointer e are alignment.

. in case of using loop antenna, increase output of
AM SSG for 26dB than bar antennas input as it
attenuates input sensitivity for ZédB. (See Fig. 3-4)

5. Nonmetaric, plastic alignment tools should be used
for RF alignment.

Fig. 3-4
BAR ANT®

4x035.)

aJmoa ANT
605m""1VTVM SCOPE
AM SSG LOOP ANT UNIT /7l\
OUTO- TAPE IN OUT
REC _ _ V
0-- fi/ BOAR ANT 0 _Y~ _____ o G j; ____1 o
o- L-<> o- -o
FEED SIGNAL MEASURE
STEP sun ECT _ AD usr AD usr FOR CONDITION
FROM I TO OUTPUT l
1 IF coil Output 60dB OSC trimmer F-1417C T302 Max. IF wave- oBetter to adjust T304 at last for
Genescope cap. (TC303) terminal 30 T304 form Fig. 3-7 easiness
Fig. 3-6 Genescope T305
input T306
2 535kHz 545kHz Bar ANT REC OUT T303 Max. output elf broadcasting station is near,
Dial ANT input 60dB L or R-ch it might be used
Calibration 400Hz VTVM 8:
(30% MOD) Scope I...imi..,imi
AM SSG 5 5 liilll
Use ioop ANT
3 1400kHz 1400kHz Same as above Same as TC303 Same as above Same as above
Dial ANT input 60dB above
Calibration 400:2 OD) W
(30 M . xv. . .. ..
AM 556 we
Use loop ANT
4 Confirm Same as Step 2 Same as above Same as Confirm 535kHz olf not, repeat from Step 2
535kHz above Dial
Dial Calibration
Calibration
5 Confirm Same as Step 3 Same as above Same as Confirm olf not, repeat from Step 3
1400kHz above 1400kHz
Dial Dial
Calibration Calibration
6 600kHz 600kHz Same as above Same as L304 Max. output
RF Adj. ANT input 60dB above T301
400Hz
(30% MOD)
AM SSG
Use loop ANT
7 1400kHz Same as Step 3 Same as above Same as TC301 Same as above
RF Adj. above TC302
8 Signal 1000kHz Same as above Signal VR301 3.3 on meter oTune AM SSG (Max. indication
meter ANT input74dl3 Meter of signal meter)
400Hz l oBefore adjustment, if meter
(30% MOD) 0W. swang out or not enough pre-
AM SSG adjust VR301 until the reason-
Use loop ANT able point
9 6.5kHz 6,5kHz F-l417C REC OUT L303 Min. 6.5kHz
Trape coil Output 1V terminal 36 L or vah
(low pass Audio Osci. VTVM 8:
filter) Scope
1O 9.5kHz 9.5kHz Same as above Same as L302 Min. 9.5kHz
Trape coil Output 1V above
(low pass Audio Osci.
filter)

Page 35

EIGHT-DELUXE

6-12-2. Section-2
Parts List

Part: No. Stock No. Descripfion
1 5109222 Binding Heed Tapping Screw. MSX 5
2 5109222 Binding Head Tapping Screw, M3 x 8
3 5066031 Transistor Cover
4 5109222 Binding Head Tapping Screw, MSX 8
5 5109222 Binding Heed Tapping Screw, M3 X B
6 5066031 Transisiar Cover
7 5101043 Binding Head Screw, M3X6
8 5101043 Binding Head Screw, M3 X 6
9 5101043 Binding Head Screw, M3 X 6
10 5246520 Stopper. dial scale
11 5407421 Dial Scale
12 0400170 Lead Type Lamp (7v 160mA), POWER
indicator
13 5101043 Binding Head Screw. M3 X 6
14 5101043 Binding Head Screw, M3 X 6
15 5249720 Holder. signal 5; tune meter
16 7726050 Tuning Lamp Ass'y A
17 0420040 Fuse Type Lamp (7V 300mA), signal meter
18 4300510 Signal Meter
19 5066200 Meter Cover
20 7726050 Tuning Lamp Ass'y A
21 0420040 Fuse Type Lamp (7V 300mA), lune meter
22 4300600 Tune Meier
23 5066200 Meter Cover
24 5101043 Binding Head Screw, M3 X 6
25 5101043 Binding Head Screw. M3 X 6
26 5101043 Binding Head Screw. M3X6
27 5246822 Holder. primed circuit board
23 Printed Circuit Board F-i205
29 0420040 Fuse Type Lamp (7V 300mA)
30 0400161 Lead Type Lamp (6V 100mA). STEREO
lndlcalor
31 5249590 Guide Plate. lead
32 0400155 Lead Type Lamp (7v 160mA). PHONO~2
indicator
33 0400154 Lead Type Lamp (7V 160mA). PHONO-i
indicator
34 0400170 Lead Type Lamp (7V 160mV). AUX Indicator
35 0400153 Lead Type Lamp (7V 160ml). FM indicator
36 0400141 Lead Type Lamp (7V 160mA), AM indicator
37 5109124 Binding Head Tapping Screw, M3><12
38 5109124 Binding Head Tapping Screw. Max 12
39 5109124 Binding Head Tapping Screw, M3X12
40 5246500 Retainer L. wood bonnet
41 5109124 Binding Head Tapping Screw. max 12
42 5109124 Binding Head Tapping Screw. M3X 12
43 5109124 Binding Head Tapping Screw. Mix 12
44 5109124 Binding Head Tapping Screw, Max 12
45 5269200 Holder. pulley
46 Tuner Ass'y
47 5100244 Binding Head Screw, M3 X B
48 5100244 Binding Head Screw, M3 X B
49 6146640 Diai Pulley E
50 5100244 Binding Head Screw. M3 X 8
51 5100244 Binding Head Screw. M3 X8
52 6146343 Dial Pulley C
53 5109122 Binding Head Tapping Screw. M3X 8
54 5109122 Binding Head Tapping Screw, MBX 8
55 5109122 Binding Head Tapping Screw, M3 X 8
56 5246490 Retainer R. wood bonnet

29