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Philips Communication & Security Systems
Supply Centre Breda
Customer Support
The Netherlands

COPYRIGHT (c) Philips Electronics N.V. 1994
Printed in the Netherlands

Supply Centre Breda

SQ 20 Amplifiers

CONTENTS
CHAPTER

DESCRIPTION

PAGE

1

INTRODUCTION

3

1.1

GENERAL

3

1.2

THE SQ20 RANGE

3

2

TECHNICAL DATA

4

3

INSTALLATION INSTRUCTIONS

4

4

CHECKING AND ADJUSTING

5

5

CIRCUIT DESCRIPTION

6

5.1

DIFFERENCE BETWEEN THE SEVERAL OUTPUT-STAGE’S

6

6

SPARE PARTS

7

6.1

RECOMMENDED SPARE-PARTS TOTAL SQ 20 SERIES

8

6.2

SPARE-PARTS, LISTED PER TYPE-NUMBERS

9

6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.2.10
6.2.11
6.2.12
6.2.13

LBB 1227/00
LBB 1228/00
LBB 1229/00
LBB 1230/00
LBB 1231/00
LBB 1232/00
LBB 1233/00
LBB 1234/00
LBB 1235/00
LBB 1236/00
LBB 1237/00
LBB 1238/00
LBB 1240/00

9
9
10
11
12
13
14
15
16
17
18
19
20

Service documentation 4822 733 24416

14 February 1994
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SQ 20 Amplifiers

Supply Centre Breda

CONTENTS (cont’d)
7

DRAWINGS
FIGURE: (as appendix)

7.1
7.2
7.3
7.4

LBB 1229/00 WIRING-DIAGRAM
LBB 1229/00 CIRCUIT-DIAGRAM PART 1
LBB 1229/00 CIRCUIT-DIAGRAM PART 2
LBB 1229/00 PRINTED CIRCUIT BOARD LAY-OUT

7.4.1
7.5
7.6
7.7

LBB 1230/00 CIRCUIT DIAGRAM PART 1
LBB 1230/00 CIRCUIT DIAGRAM PART 2
LBB 1230/00 PRINTED CIRCUIT BOARD LAY-OUT PART 1
LBB 1230/00 PRINTED CIRCUIT BOARD LAY-OUT PART 2

7.8
7.9
7.10
7.11

LBB 1231/00, -1232/00, -1233/00 CIRCUIT DIAGRAM PART 1
LBB 1231/00, -1232/00, -1233/00 CIRCUIT DIAGRAM PART 2
LBB 1231/00, LBB 1232/00, LBB 1233/00 PCB LAY-OUT PART 1
LBB 1231/00, LBB 1232/00, LBB 1233/00 PCB LAY-OUT PART 2

7.12
7.13

LBB 1234/00, LBB 1235/00 CIRCUIT DIAGRAM
LBB 1234/00, LBB 1235/00 PCB LAY-OUT

7.14
7.15
7.16
7.17
7.18
7.19
7.20
7.21

LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 1
LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 2
LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 3
LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 4
LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 5
LBB 1237/00, LBB 1238/00 PCB LAY-OUT PART 1
LBB 1237/00, LBB 1238/00 PCB LAY-OUT PART 2
LBB 1237/00, LBB 1238/00 PCB LAY-OUT PART 3

8.

ADDITIONAL TYPE NUMBERS (SERVICE INFORMATION)

8.1
8.2
8.3
8.4

LBB 1227/00 UNIVERSAL PRE-AMPLIFIER
LBB 1228/00 CASSETTE UNIT
LBB 1236/00 SYSTEM PRE-AMPLIFIER
LBB 1240/00 240 W BOOSTER AMPLIFIER

9.

GENERAL SERVICE INFORMATIONS

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
-2-

Supply Centre Breda

SQ 20 Amplifiers

1

INTRODUCTION

l.l.

GENERAL
The SQ20 range of high performance audio mixing, pre-mixing, booster and system amplifiers have been
designed for use in a wide variety of Public Address environments. Ease of operation, combined with good
service-accessibility have been optimised in their design.

1.2.

THE SQ 20 RANGE
The SQ20 range consists of the following products:
LBB 1227/00
LBB 1228/00
LBB 1229/00
LBB 1230/00
LBB 1231/00
LBB 1232/00
LBB 1233/00
LBB 1234/00
LBB 1235/00
LBB 1236/00
LBB 1237/00
LBB 1238/00
LBB 1239/00
LBB 1240/00

Universal Pre-Amplifier
Cassette Unit
Tuner-unit
Pre-Mixing Amplifier
30 Watt Mixing Amplifier
60 Watt Mixing Amplifier
120 Watt Mixing Amplifier
60 Watt Booster Amplifier
120 Watt Booster Amplifier
System Pre-Amplifier
60 Watt System Amplifier
120 Watt System Amplifier
Mounting-brackets
240 Watt Booster Amplifier

: SI 4822 861 05025
: SI 4822 861 05012
: SM 4822 733 24416
:: “

:: “

:: “

:: “

:: “

:: “

: SI 4822 861 05019
: SM 4822 733 24416
:: “

: “

: SI 4822 861 05039

Note: SM - & gt; Service manual
SI - & gt; Service information
All relevant service information for the products can be found in the bulletins listed above. Not included
in this manual are the callstation(s) LBB 9427/10, LBB 9527/10 and LBB 9527/60. The LBB 9427/10,
and the new colour-item LBB 9527/10, are described within service manual: 4822 733 24437.
The LBB 9527/60 is described within a service information: 4822 861 05002.
This Service Manual is intended to provide all necessary information to carry out corrective maintenance
according to agreed policies. Spare parts are defined accordingly. In general this means repair on sub
assembly level. Component level repair can only be allowed where it can be carried out on a cost-effective
way.

Service documentation 4822 733 24416

14 February 1994
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SQ 20 Amplifiers

2

Supply Centre Breda

TECHNICAL DATA
Figure 2.1 upto and including 2.4 give all relevant data for SQ20 products.
For products for which service information is released through SI’s this information can be found in
chapter 8.

3

INSTALLATION INSTRUCTIONS
-

Opening the amplifier

Access can be gained to the inner side of the amplifier by removing the top cover.
Care should be taken not to lose the toothed washers which are fitted underneath the screws. For safety
reasons these washers are required to electrically bond the top cover to the earthed chassis of the amplifier.
And must therefore always be fitted.
Warning !:
-

Before removing the cover, disconnect the amplifier from the mains supply by
removing the mains plug!

19” Rack Mounting

The range of SQ20 system amplifiers have been designed for both tabletop and 19” rack mounting. Two
mounting brackets (LBB 1239/00) can be ordered when rack mounting is required.
To attach the mounting brackets, first remove the top cover as described.
Locate the two screw holes provided for at both sides of the amplifier. Using the also added screws, firmly
mount the brackets to the amplifier.
CAUTION !:

SQ20 amplifiers are not suitable for any surveillance application with e.g. 20kHz.
It is essential that the SQ 20 products are used within the specified temperature range.
The maximum permissible temperature is + 45°C. Care has to be taken that when they
are mounted within a 19” cabinet the air inside the 19” cabinet never exceeds the above
mentioned maximum temperature.

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
-4-

Supply Centre Breda

-

SQ 20 Amplifiers

Mains connections and earthing

The system amplifiers are supplied ready for use on 220 V a.c. mains. They are adjustable for use on
110 V, 127 V, 220 V –230 V and 240 V by resoldering the brown wire onto the appropriate tag on the
mains transformer (T). The protective shield on the mains transformer should never be removed. Care
should be taken to ensure that the wire is hooked in, and firmly soldered onto the tag.
A non restoring thermal fuse, located in the mains transformer, will disconnect the mains supply, should
the mains transformer overheat.
CAUTION:

The amplifier must be tapped for the correct mains voltage, as described, before
connecting it to the mains supply. On delivery the amplifier is supplied with a 2m long
3-core mains lead, terminated at one end with a 2 pole mains plug with earth contacts,
and at the other end with a C.E.E connector. In some countries it may be necessary to
replace the mains plug with one of a local standard type. A replacement plug must be
wired as follows:
Earth - green/yellow
Neutral - blue
Live - brown

WARNING !:
WARNING !:

4

This amplifier must be powered via an earthed mains outlet
This fusable link operates on the primary winding of the mains transformer, and
although the mains indicator LED may be off the full mains supply voltage is still
present inside the amplifier.

CHECKING AND ADJUSTING
See Instructions for use which are always included in the same package as the product.

Service documentation 4822 733 24416

14 February 1994
-5-

SQ 20 Amplifiers

5

Supply Centre Breda

CIRCUIT-DESCRIPTION
Detailed circuit descriptions are not included in this manual. The used technique for this amplifiers in
combination with the selected spare parts makes this not necessary. The knowledge of the workshopengineer should be at the required level.

5.1

DIFFERENCE BETWEEN THE SEVERAL OUTPUT-STAGE’S:
AMPLIFIER-MODEL

30W

60W

120W

MIXINGBOOSTERSYSTEM-

LBB 1231/00
LBB
LBB

1232/00
1234/00
1237/00

1233/00
1235/00
1238/00

ITEM

30W

60W

120W

R150, R156
R155, R158
R149, R166
R144
C201
C207
F201
F202
F001
R501

470 Ω
4,7 kΩ
4700uF

1k Ω
5,6kQ
6800uF

F 5A

F 8A

T 1A
330 Ω

T 1,6A
180 Ω

4,7Ω
1,5k Ω
1,5k Ω
5,6k Ω
4700uF
4700uF
F 10A
F 10A
T 2,5A
100 Ω ALL 5W

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
-6-

Supply Centre Breda

6

SQ 20 Amplifiers

SPARE-PARTS
General:
The spare-parts, as indicated in the following lists, are selected components / sub assemblies.
The spare-parts are available from Philips Consumer Service.
The mentioned spare-parts, used within the several products of the SQ20 range, are NOT listed with the
so-called ’pos.’ numbers. Instead of, we have used the commercial code number of the component. E.g.
Transistor Q302 which has a commercial indicator C458 is listed as “transistor C458 NPN with a 5322..
number-, and NOT as “pos. Q302”, with a 5322.. number.

Service documentation 4822 733 24416

14 February 1994
-7-

SQ 20 Amplifiers

6.1

Supply Centre Breda

RECOMMENDED SPARE-PARTS TOTAL SQ 20 SERIES:
Tuner PCB assy. (LBB 1229-1236-1237-1238)
Tuner-Meter
Battery connector
Mains switch
Mains inlet
Thermistor SDT 09
Mains transformer (LBB 1227-1229-1230)
Mains transformer PT-SQ20-30W
Output transformer 30 W
Mains transformer PT-SQ20-60W
Output transformer 60 W
Mains transformer PT-SQ20-120W
Output transformer 120 W
Mains transformer (LBB 1236)
Output transformer 240 W (OT-SQ20-240W)
Transistor C485 NPN
Transistor A673 PNP
Operational amplifier LF 353
Operational amplifier LM 324
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode 1 N4148 (BAW 62)
Power-transistor C3281
Pre-amplifier integrated circuit OQ 0703
Fan-motor
Fuses: F 0,5 A
T 0,5 A
T 1,0 A
T 1,6A
T 2,0 A
T 2,5 A
T 3,15 A
F 5,0 A
T 5,0 A
F 8,0 A
F 10 A
Handgrip (2 pcs. incl. screws)

SERVICE DOCUMENTATION 4822 733 24416

5322 214 11157
5322 344 50118
5322 265 30875
5322 277 11136
5322 265 30876
5322 116 30414
5322 146 10331
5322 140 60291
5322 146 10327
5322 146 10332
5322 146 10333
5322 146 10334
5322 140 60332
5322 148 20024
5322 140 10481
5322 130 62667
4822 130 41412
5322 209 81395
4822 209 80587
4822 209 73037
5322 209 72458
4822 130 80562
4822 130 30613
5322 130 62673
5322 209 63972
5322 361 10598
4822 070 35001
4822 070 15001
4822 070 31002
4822 070 31602
4822 070 32002
4822 070 32502
4822 070 33152
5322 253 40055
4822 070 35002
5322 253 40034
4822 070 61003
5322 498 50319

14 February 1994
-8-

Supply Centre Breda

SQ 20 Amplifiers

6.2

SPARE-PARTS listed per type-number:

6.2.1

SPARE-PARTS LBB 1227/00 SQ-20 UNIVERSAL PRE-AMPLIFIER
P.C.B assy. (27-1)
P.C.B assy. (27-2)
P.C.B assy. (27-3)
Mains transformer
Mains switch
Mains inlet
Rotary switch
Knob (volume)
Knob (tone control)
Handgrip (2 pcs. incl. screws)

6.2.2

5322 214 91079
5322 214 91081
5322 214 91082
5322 146 10331
5322 277 11136
5322 265 30876
5322 273 80347
5322 414 30152
5322 414 30183
5322 498 50319

SPARE-PARTS LBB 1228/00 SQ-20 CASSETTE UNIT
P.C.B assy. (SQ20 28-1)
Integrated circuit (U2) TA 7668 BP
Front panel
Complete cassette player (commercial item)
19” mounting brackets (commercial item)

Service documentation 4822 733 24416

5322 214 11226
4822 209 71873
5322 447 50154
LBB 1228/50
LBB 1239/00

14 February 1994
-9-

SQ 20 Amplifiers

6.2.3

Supply Centre Breda

SPARE-PARTS LBB 1229/00 SQ-20 TUNER-UNIT
Tuner PCB assy.
Tuner-Meter
Tuner channel-selector switch
Loudspeaker
Mains transformer (PT-SQ20-PM)
Mains switch
Mains inlet
Fuse (5A)
Battery connector
Potentiometer (50K)
Transistor C485 NPN
Transistor A673 PNP
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode BAW 62
Diode 1N4148
Front panel
Handgrip (2pcs. incl. screws)
Knob (Ø14)
Jack-plug (PJ-202 NP)
Phone jack (HT J064-03)
Phone jack

5322 214 11157
5322 344 50118
5322 210 10424
5322 240 40196
5322 146 10331
5322 277 11136
5322 265 30876
5322 253 40055
5322 265 30875
5322 101 11138
5322 130 62667
4822 130 41412
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
4822 130 30613
4822 130 30621
5322 447 50146
5322 498 50319
5322 414 30183
5322 265 20515
5322 267 10273
5322 267 10276

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
- 10 -

Supply Centre Breda

6.2.4

SQ 20 Amplifiers

SPARE-PARTS LBB 1230/00 SQ-20 PRE-MIXING AMPLIFIER
PCB assy. (SQ20-3)
PCB assy. (SQ20-7)
Mains transformer PT SQ.20-PM
Main switch
Mains inlet 4300-1002
Battery connector (incl. fuse) DT55A02W-02
Fuses: F 0,5 A
T1A
T 0,5 A
Potentiometer RK163111A152
Potentiometer RK163111R376
Transistor C485 NPN
Transistor A673 PNP
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode BAW 62
Diode 1N4148
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Knob (Ø 14)
Jack plug PJ-202NP
Phone Jack HTJ064-03
DIN 5 pol DJ-005

Service documentation 4822 733 24416

5322 214 11211
5322 214 11212
5322 146 10331
5322 277 11136
5322 265 30876
5322 265 30875
4822 070 35001
4822 070 31002
4822 070 15001
5322 101 11139
5322 101 11138
5322 130 62667
4822 130 41412
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
4822 130 30613
4822 130 30621
5322 447 50153
5322 498 50319
5322 414 30152
5322 414 30183
5322 265 20515
5322 267 10273
5322 267 10272

14 February 1994
- 11 -

SQ 20 Amplifiers

6.2.5

Supply Centre Breda

SPARE-PARTS LBB 1231/00 SQ-20 30 W MIXING AMPLIFIER
PCB assy. Main 30W
(SQ20-1)
PCB assy. Pre-input
(SQ20-7)
PCB assy. Power supply (SQ20-2)
Mains transformer 30W
Main switch
Mains inlet
Thermistor SDT 09
Battery conn. incl. fuse
Fuses: F 5,0 A
T 2,0 A
T 1,0 A
Output transformer 30 W
Potentiometer A152
Potentiometer R376
Transistor C485 NPN
Transistor D673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Power-transistor 2SD718(0)
Pre-amplifier integrated circuit OQ 0703
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode D 1502
Diode BAW 62
Diode 1N4148
Diode P600D
Front panel
Handgrip (2pcs. incl. screws)
Knob (Ø 18)
Knob (Ø 14)
Jack plug
5P DIN
Phone Jack
Made-and-lock 6 pol.

5322 214 11213
5322 214 11212
5322 214 11218
5322 140 60291
5322 277 11136
5322 265 30876
5322 116 30414
5322 265 30875
5322 253 40055
4822 070 32002
4822 070 31002
5322 146 10327
5322 101 11139
5322 101 11138
5322 130 62667
4822 130 41412
5322 130 62961
5322 130 43371
5322 130 62673
5322 130 62836
5322 209 63972
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
5322 130 82533
4822 130 30613
4822 130 30621
5322 130 82746
5322 447 50144
5322 498 50319
5322 414 30152
5322 414 30183
5322 265 20515
5322 267 10272
5322 267 10273
5322 267 40995

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
- 12 -

Supply Centre Breda

6.2.6

SQ 20 Amplifiers

SPARE-PARTS LBB 1232/00 SQ-20 60 W MIXING AMPLIFIER
PCB assy. Main 60W
(SQ20-1)
PCB assy. Pre-input
(SQ20-7)
PCB assy. Power supply (SQ20-2)
Mains transformer 60 W
Mains switch
Mains inlet
Battery conn. incl. fuse
Thermistor SDT 09
Fuses: F 8,0 A
T 3,15 A
T 1,6 A
Output transformer 60 W
Potentiometer A152
Potentiometer R376
Transistor C485 NPN
Transistor A673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Pre-amplifier integrated circuit OQ 0703
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode D 1502
Diode BAW 62
Diode 1 N4148
Diode P600D
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Knob (Ø 14)
Jack plug
Phone JACK
SP DIN
Made-and-lock 6 pol.

5322 214 11214
5322 214 11212
5322 214 11219
5322 146 10332
5322 277 11136
5322 265 30876
5322 265 30875
5322 116 30414
5322 253 40034
4822 070 33152
4822 070 31602
5322 146 10333
5322 101 11139
5322 101 11138
5322 130 62667
4822 130 41412
5322 130 62691
4822 130 43371
5322 130 62673
5322 209 63972
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
5322 130 82533
4822 130 30613
4822 130 30621
5322 130 82746
5322 447 50144
5322 498 50319
5322 414 30152
5322 414 30183
5322 265 20515
5322 267 10273
5322 267 10272
5322 267 40995

Service documentation 4822 733 24416

14 February 1994
- 13 -

SQ 20 Amplifiers

6.2.7

Supply Centre Breda

SPARE-PARTS LBB 1233/00 SQ-20 120 W MIXING AMPLIFIER
PCB assy. Main 120W
(SQ20-1)
PCB assy. Pre-input
(SQ20-7)
PCB assy. Power supply (SQ20-2)
Mains transformer 120 W
Mains switch
Mains inlet
Thermistor SDT 09
Battery conn. incl. fuse
Fuses: F 10 A
T 5,0 A
T 2,5 A
Output transformer 120 W
Fan-motor
Potentiometer A152
Potentiometer R376
Transistor C485 NPN
Transistor A673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Pre-amplifier integrated circuit OQ 0703
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode D 1502
Diode BAW 62
Diode 1 N4148
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Knob (Ø 14)
Jack plug
Phone jack
5P DIN
Made-and-lock 6 pol.

5322 214 11215
5322 214 11212
5322 214 11221
5322 146 10334
5322 277 11136
5322 265 30876
5322 116 30414
5322 265 30875
4822 070 61003
4822 070 35002
4822 070 32502
5322 140 60332
5322 361 10598
5322 101 11139
5322 101 11138
5322 130 62667
4822 130 41412
5322 130 62961
4822 130 43371
5322 130 62673
5322 209 63972
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
5322 130 82533
4822 130 30613
4822 130 30621
5322 447 50144
5322 498 50319
5322 414 30152
5322 414 30183
5322 265 20515
5322 267 10273
5322 267 10272
5322 267 40995

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
- 14 -

Supply Centre Breda

6.2.8

SQ 20 Amplifiers

SPARE-PARTS LBB 1234/00 SQ-20 60 W BOOSTER AMPLIFIER
PCB assy. Main 60W
(SQ20-1)
PCB assy. Power supply (SQ20-2)
Mains transformer 60 W
Mains switch
Mains inlet
Thermistor SDT 09
Battery connector. incl. fuse
Fuses: F 8,0 A
T 3,15 A
T 1,6 A
Output transformer 60 W
Potentiometer
Transistor C485 NPN
Transistor A673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode D 1502
Diode BAW 62
Diode 1 N4148
Diode P600D
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Jack-plug
Phone Jack
5P DIN
Made-and-lock 6 pol.

5322 214 11223
5322 214 11219
5322 146 10332
5322 277 11136
5322 265 30876
5322 116 30414
5322 265 30875
5322 253 40034
4822 070 33152
4822 070 31602
5322 146 10333
5322 101 11138
5322 130 62667
4822 130 41412
5322 130 62961
5322 130 43371
5322 130 62673
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
5322 130 82533
4822 130 30613
4822 130 30621
5322 130 82746
5322 447 50143
5322 498 50319
5322 414 30152
5322 265 20515
5322 267 10273
5322 267 10272
5322 267 40995

Service documentation 4822 733 24416

14 February 1994
- 15 -

SQ 20 Amplifiers

6.2.9

Supply Centre Breda

SPARE-PARTS LBB 1235/00 SQ-20 120 W BOOSTER AMPLIFIER
PCB assy. Main 120W (SQ20-1)
PCB assy. Power supply (SQ20-2)
Mains transformer 120 W
Main switch
Mains inlet
Thermistor SDT 09
Battery conn. incl. fuse
Fuses: F 10 A
T 5,0 A
T 2,5 A
Fan-motor
Output transformer 120 W
Potentiometer
Transistor C485 NPN
Transistor A673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Operational amplifier LF 353
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode D 1502
Diode BAW 62
Diode 1 N4148
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Jack-plug
Phone Jack
5P DIN
Made-and-lock 6 pol.

5322 214 11222
5322 214 11221
5322 146 10334
5322 277 11136
5322 265 30876
5322 116 30414
5322 265 30875
4822 070 61003
4822 070 35002
4822 070 32502
5322 361 10598
5322 140 60332
5322 101 11138
5322 130 62667
4822 130 41412
5322 130 62691
5322 130 43371
5322 130 62673
5322 209 81395
4822 209 73037
5322 209 72458
4822 130 80562
5322 130 82533
4822 130 30613
4822 130 30621
5322 447 50143
5322 498 50319
5322 414 30152
5322 265 20515
5322 267 10273
5322 267 10272
5322 267 40995

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
- 16 -

Supply Centre Breda

SQ 20 Amplifiers

6.2.10 SPARE-PARTS LBB 1236/00 SQ-20 SYSTEM PRE-AMPLIFIER
PCB assy. (36-1)
PCB assy. (36-2 or 36-6)
PCB assy. (36-3)
PCB assy. (36-4)
PCB assy. (36-5)
PCB assy. (36-7)
PCB assy. (36-8)
PCB assy. (36-9)
PCB assy. (36-10)
PCB assy. (36-11)
PCB assy. (36-12)
Mains transformer (PT-SQ20-PS)
Mains switch
Mains inlet
Switch ( zone)
Tuner channel-selector switch
Knob (volume)
Knob (tone control)
Knob (Zl....Z6)
Handgrip (2 pcs. incl. screws)

5322 214 11169
5322 214 11171
5322 214 11172
5322 214 11173
5322 214 11174
5322 214 11175
5322 214 11176
5322 214 11177
5322 214 11178
5322 214 11179
5322 214 11181
5322 148 20024
5322 277 11136
5322 265 30876
5322 276 20512
5322 210 10424
5322 414 30152
5322 414 30183
5322 414 20393
5322 498 50319

Service documentation 4822 733 24416

14 February 1994
- 17 -

SQ 20 Amplifiers

Supply Centre Breda

6.2.11 SPARE-PARTS LBB 1237/00 SQ-20 60 W SYSTEM AMPLIFIER
PCB assy. Main 60W
(SQ20-1)
PCB assy. Power supply (SQ20-2)
PCB assy. System 60W
(SQ20-8 & 9)
Tuner PCB assy (module), (incl. conn.)
Aerial plug assy (incl. filling pcs.)
Mains transformer 60 W
Mains switch
Mains inlet
Thermistor SDT 09
Battery conn. (incl. fuse)
Fuses: F 8,0 A
T 3,15 A
T 1,6 A
Output transformer 60 W
Tuner channel-selector switch
Tuner-meter
Zone switch 2 channel
Switch tuner/tape
Relais 2 pol.
Relais 4 pol.
Potentiometer A152
Potentiometer A376
Transistor C485 NPN
Transistor A673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Pre-amplifier integrated circuit OQ 0703
Operational amplifier LF 353
Operational amplifier LM 324
Integrated circuit BA 6144
Integrated circuit NJM 386 D
Diode 1 N 60 Germanium
Diode D 810
Diode D 1502
Diode BAW 62
Diode 1 N4148
Diode P600D
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Knob (Ø 14)
Knob 10 x 7
Phone Jack

5322 214 11217
5322 214 11219
5322 214 11224
5322 214 11157
5322 264 30317
5322 146 10332
5322 277 11136
5322 265 30876
5322 116 30414
5322 265 30875
5322 253 40034
4822 070 33152
4822 070 31602
5322 146 10333
5322 210 10424
5322 344 50118
5322 276 20512
5322 277 21507
5322 280 20483
5322 280 20484
5322 101 11139
5322 101 11144
5322 130 62667
4822 130 41412
5322 130 62961
5322 130 43371
5322 130 62673
5322 209 63972
5322 209 81395
4822 209 80587
4822 209 73037
5322 209 72458
4822 130 80562
5322 130 82564
5322 130 82533
4822 130 30613
4822 130 30621
5322 130 82746
5322 447 50145
5322 498 50319
5322 414 30152
5322 414 30183
5322 414 20393
5322 267 10273

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
- 18 -

Supply Centre Breda

SQ 20 Amplifiers

SPARE-PARTS LBB 1237/00 SQ-20 60 W SYSTEM AMPLIFIER (Cont’d)
Jack-plug 2 pol.
Jack 4 pol.
DIN 5 pol.
DIN 6 pol.
Made-and-lock 9 pol.
Made-and-lock 12 pol.

5322 265 20515
5322 265 20517
5322 267 10272
5322 267 10275
5322 267 40999
5322 267 41001

6.2.12 SPARE-PARTS LBB 1238/00 SQ-20 120 W SYSTEM AMPLIFIER
PCB assy. Main 120W
(SQ20-1)
PCB assy. Power supply (SQ20-2)
PCB assy. System 120W (SQ20-8 & 9)
Tuner PCB assy., (incl. conn.)
Aerial plug assy (incl. filling pcs.)
Mains transformer 120 W
Mains switch
Mains inlet
Thermistor SDT 09
Battery conn. (incl. fuse)
Fuses: F 10 A
T 5,0 A
T 2,5 A
Fan-motor
Output transformer 120 W
Tuner-meter
Tuner channel-selector switch
Zone switch
2 channel Switch tuner/tape
Relais 2 pol.
Relais 4 pol.
Potentiometer A152
Potentiometer A376
Transistor C485 NPN
Transistor A673 PNP
Transistor D613E NPN
Transistor D667 NPN
Power-transistor C3281
Pre-amplifier integrated circuit OQ 0703
Operational amplifier LF 353
Operational amplifier LM 324
Integrated circuit BA 6144
Integrated circuit NJM 386 D

5322 214 11216
5322 214 11221
5322 214 11225
5322 214 11157
5322 264 30317
5322 146 10334
5322 277 11136
5322 265 30876
5322 116 30414
5322 265 30875
4822 070 61003
4822 070 35002
4822 070 32502
5322 361 10598
5322 140 60332
5322 344 50118
5322 210 10424
5322 276 20512
5322 277 21507
5322 280 20483
5322 280 20484
5322 101 11139
5322 101 11144
5322 130 62667
4822 130 41412
5322 130 62961
4822 130 43371
5322 130 62673
5322 209 63972
5322 209 81395
4822 209 80587
4822 209 73037
5322 209 72458

Service documentation 4822 733 24416

14 February 1994
- 19 -

SQ 20 Amplifiers

Supply Centre Breda

SPARE-PARTS LBB 1238/00 SQ-20 120 W SYSTEM AMPLIFIER
(Cont’d)
Diode 1 N 60 Germanium
Diode D 810
Diode D 1502
Diode BAW 62
Diode 1 N4148
Front panel
Handgrip (2 pcs. incl. screws)
Knob (Ø 18)
Knob (Ø 14)
Knob 10 x 7
Jack-plug
Jack
Phone jack
DIN 5 pol.
DIN 6 pol.
Made-and-lock 9 pol.
Made-and-lock 12 pol.

4822 130 80562
5322 130 82564
5322 130 82533
4822 130 30613
4822 130 30621
5322 447 50145
5322 498 50319
5322 414 30152
5322 414 30183
5322 414 20393
5322 265 20515
5322 265 20517
5322 267 10273
5322 267 10272
5322 267 10275
5322 267 40999
5322 267 41001

6.2.13 SPARE-PARTS LBB 1240/00 SQ-20 240 W BOOSTER AMPLIFIER
PCB assy. (240-1)
PCB assy. (240-2)
PCB assy. (240-3)
Mains transformer 120W
Mains switch
Mains inlet
Output transformer 240W
Fan motor
Power transistor C3281
Handgrip
Knob (Ø 18)

5322 214 11197
5322 214 11198
5322 214 11199
5322 146 10334
5322 277 11136
5322 265 30876
5322 140 10481
5322 361 10598
5322 130 62673
5322 498 10466
5322 414 30152

SERVICE DOCUMENTATION 4822 733 24416

14 February 1994
- 20 -