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BRC Thorn Chassis Guide

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BRC Thorn Chassis Guide 1This article aims to provide brief details of all the TV receiver models marketed by Thorn under the brand-names, Ferguson, HMV, Marconiphone and Ultra. Hopefully it will help you identify the chassis fitted in your set and offer the screen size. Remember the  first letter of the model denotes the  brand. For example 3713  (3) being Ferguson.

 

If you have model information that is missing from this guide and would like to help make it complete, submit your model info via the contact page here.


Chassis – First A Visual Guide

Sometimes it helps to have an idea on what the particular chassis looked like, so lets start with a quick visual guide before we get onto actual model data.

BRC Thorn Chassis Guide 2

BRC Thorn Chassis Guide 3

BRC Thorn Chassis Guide 4

BRC Thorn Chassis Guide 5

BRC Thorn Chassis Guide 6

BRC Thorn Chassis Guide 7

BRC Thorn Chassis Guide 8

BRC Thorn Chassis Guide 9

BRC Thorn Chassis Guide 10

BRC Thorn Chassis Guide 11

BRC Thorn Chassis Guide 12

BRC Thorn Chassis Guide 13 BRC Thorn Chassis Guide 14 BRC Thorn Chassis Guide 15 BRC Thorn Chassis Guide 16 BRC Thorn Chassis Guide 17 BRC Thorn Chassis Guide 18 BRC Thorn Chassis Guide 19

Model Guide

MonoChrome Chassis – Dual Standard

Model

Screen Size

Chassis

705

19

700 Phase II Convertible

707

23

700 Phase II Convertible

719

23

700 Phase II Convertible

726

19

700 Phase II Convertible

727

23

700 Phase II Convertible

1100

19

700 Phase II Convertible

1105

19

700 Phase II Convertible

1110

23

700 Phase II Convertible

1921

19

700 Phase II Convertible

1922

19

700 Phase II Convertible

1923

23

700 Phase II Convertible

1924

23

700 Phase II Convertible

Model

Screen Size

Chassis

2600

19

800 Phase II

2601

19

800 Phase II

2602

23

800 Phase II

2603

19

850 Phase II Convertible

2604

23

800 Phase II

2605B

19

800 Phase II

2605

19

700 Phase II Convertible

2606

19

800

2607

19

800

2609

19

850

2610

23

800

2611

19

800

2613

19

850 Phase II Convertible

2614

23

850 (Includes FM Radio)

2616

23

850

Model

Screen Size

Chassis

2618

19

850

2619

19

850

2620

19

900

2621

19

900

2623

23

900

2624

23

900  (Includes FM Radio)

2625

19

850 (Wired Distribution)

2627

19

950

2629

23

950

2631

23

950

2633

16

960

2635

19

950 MKII

2636

19

970

2637

23

950 MKII

Model

Screen Size

Chassis

2638

16

960

2639

19

1400

2640

23

1400

2641

19

950 MKII

2642

23 MKII (20kV)

979

2645

16

1416

2646

19

1400

2647

23

1400

2648

23

1400

2649

20

1400

2650

20

1400

2659

24

1400

2660

20

1400

2661

17

1417

Model

Screen Size

Chassis

2662

24

1400

2668

24

1400

3600

19

800 Phase II

3601

19

800 Phase II

3602

19

800 Phase II

3603

23

800 Phase II

3604

23

800 Phase II

3605

19

800 Phase II

3605

19

800 Phase II

3606

19

800

3607

19

800

3608

19

800

3609

23

800

3610

23

800

3611

19

850 Phase II Convertible

Model

Screen Size

Chassis

3612

19

850 Phase II Convertible

3614

23

850 Phase II Convertible

3617

19

850

3618

19

850

3619

19

850

3620

23

850

3621

23

850

3622

19

850

3623

23

900

3624

19

900

3625

19

900 (Includes FM Radio)

3626

23

900

3627

23

900

Model

Screen Size

Chassis

3628

19

850 (Wired Distribution)

3629

11

900

3630

19

950

3631

19

950

3632

19

950

3633

19 MKI (16kV)

979

3634

19

950

3636

23

950

3637

23

950

3638

16

960

3640

19

950 MKII

3641

23

950 MKII

3642

19

950 MKII

3643

16

960

3644

23 MKII (20kV)

979

Model

Screen Size

Chassis

3645

16

1400

3646

19

1400

3647

23

1400

3648

19

950 MKII

3640

19

950 MKII

3641

23

950 MKII

3646

19

950 MKII

3647

23

950 MKII

3652

19

1400

3653

19

1400

3654

23

1400

3655

23

1400

3656

19 MKII (20kV)

979

3656

19 MKII (20kV)

979

3658

20

1400

Model

Screen Size

Chassis

3659

24

1400

3660

20

1400

3661

17

1417

3667

20

1400

3668

24

1400

3670

24

1400

3673

20

1400

4601

23

800 Phase II

4602

19

700 Phase II Convertible

4602B

19

800 Phase II

4603

19

850 Phase II Convertible

4609

19

850

4610

23

850

4611

19

900

4612

23

900

Model

Screen Size

Chassis

4613

19

950

4614

23

950

4615

19

950 MKII

4616

23

950 MKII

4617

23

950

4619

19

950 MKII

4619B

19

1400

4620

23

950 MKII

4620B

23

1400

4623

19

1400

4624

23

1400

4626

23

1400

4649

20

1400

4659

24

1400

4661

17

1417

Model

Screen Size

Chassis

4668

24

1400

4673

20

1400

VT172

23

700 Phase II Convertible

5600

19

800 Phase II

5601

19

800 Phase II

5602

23

800 Phase II

5605

19

700 Phase II Convertible

5605B

19

800 Phase II

5605C

19

800 Phase II

5606

19

800

5607

19

800

6600

19

800 Phase II

6601

19

800 Phase II

6604

19

800 Phase II

6606

19

800

Model

Screen Size

Chassis

6607

19

800

6608

23

800

6610

19

800

6611

23

800

6613

23

850 Phase II Convertible

6614

19

850 Phase II Convertible

6618

19

850

6619

23

850

6620

19

850

6621

23

850 (Includes FM Radio)

6622

19

850

6623

19

850 (Includes FM Radio)

6624

19

850

6625

19

900

6626

19

900

Model

Screen Size

Chassis

6627

19

900 (Includes FM Radio)

6628

23

900

6629

23

900

6630

19

850 (Wired Distribution)

6632

19

950

6634

23

950

6635

19

950 (Includes FM Radio)

6637

23

950

6638

25

950

6640

16

960

6642

25

950 MKII

6642B

19

950 MKII

6643

23

950 MKII

6645

19

970

6647

25

950 MKII

Model

Screen Size

Chassis

6640

16

960

6648

19

1400

6649

23

1400

6650

23 MKII (20kV)

979

6652

16

1400

6654

19

1400

6654B

19

950 MKII

6655

25

1400

6656

19

1400

6657

23

1400

6658

20

1400

6659

24

1400

6660

20

1400

6661

17

1417

MonoChrome Chassis – Single Standard

Model

Screen Size

Chassis

2634

12

980

2643

16

981

2644

12

980

2800

20

1500

2801

24

1500

2802

20

1500

2803

17

1500

2804

24

1500

2807

20

1500

2808

24

1500

2809

20

1525

2813

20

1500

2815

24

1525

2818

14

1591

2818B

14

1591

Model

Screen Size

Chassis

2841

14

1593

3639

12

980

3649

16

981

3650

12

980

3800

20

1500

3801

24

1500

3802

20

1500

3803

17

1500

3805

12

1580

3806

20

1579

3807

20

1500

3808

24

1500

3809

20

1500

3810

24

1500

3811

24

1500

3812

14

1579

Model

Screen Size

Chassis

3813

20

1500

3815

20

1500

3816

12

1590

3820

24

1525

3821

20

1500

3830

12

1612

3831

17

1600

3834

24

1525

3838

12

1613A

3839

14

1613B

3840

14

1691

3845

12

1690

3847

14

1691

3848

12

1690

3850

20

1615A

3852

24

1615B

Model

Screen Size

Chassis

3853

12

1692

3854

12

1692

3857

12

1694

3858

12

1694

3870

14

1697

3871

14

1697

38000

12

1696

38010

12

1696

38020

12

1790

38030

12

1790

38500

20

1615

38520

25

1615

38710

14

1697

4618

12

980

4621

12

980

4800

20

1500

4801

24

1500

4803

17

1500

4805

12

1580

4807

20

1500

4808

24

1500

4816

12

1590

4821

20

1500

4830

12

1612

Model

Screen Size

Chassis

4831

17

1600

4834

24

1525

4838

12

1613A

6641

12

980

6651

12

980

6653

16

981

6800

20

1500

6801

24

1500

6803

17

1500

6805

12

1580

6806

20

1500

6807

20

1500

6808

24

1500

6809

20

1500

6810

24

1525

6811

17

1500

Model

Screen Size

Chassis

6813

20

1500

6814

17

1500

6816

12

1590

6818

14

1591

6818B

14

1591

6820

24

1525

6821

20

1500

6823

20

1525

6830

12

1612

6831

17

1600

6835

24

1525

6838

12

1613A

6839

14

1613B

6840

14

1691

6844

24

1525

6845

12

1690

6850

20

1615A

6851

12

1690

6852

20

1615B

8827

20

1500

TX250 Chassis

Model

Description

3538

20″

Colour Chassis – Dual Standard(*) & Single Standard

BRC Thorn Chassis Guide 20

Model

Screen Size

Chassis

2700

25

2000 *

2701

19

2000 *

2703

19

3000

2704

22

3000

2705

25

3000

2711

26

3500

2712

17

8000

2714

22

3500

2715

22

3500`

2725

22

8800

2726

26

4000

3700

25

2000 *

3701

19

2000 *

3703

19

3000

3705

25

3000

Model

Screen Size

Chassis

3706

25

3000

3707

19

3000

3710

26

3500

3711

26

3500

3712

17

8000

3713

19

8500

3717

26

3500

3722

20

9000

3727

17

8000

3731

26

4000

3732

20

9000

3734

22

9600

3736

26

9600

3737

26

9600

3738

22

8800

Model

Screen Size

Chassis

3740

20

9000

3742

20

9000

3743

22

9600

3745

26

9800

3747

22

9600

3748

22

8800

3749

22

9800

3751

20

9000

3757

20

9800

3758

20

9900

3759

26

9600

3762

22

9600

3763

22

9600

3764

26

9600

3782

26

9650

Model

Screen Size

Chassis

3787

14

Special Chassis

3789

26

9650

3793

22

9653

4700

25

2000*

4701

19

2000 *

4702

25

2000*

4703

19

3000

4704

22

3000

4705

25

3000

4711

26

3500

4712

17

8000

4713

19

8500

4714

22

3500

4715

22

3500

4717

26

3500

4722

20

9000

4725

22

8800

Model

Screen Size

Chassis

6700

25

2000 *

6701

19

2000 *

6702

25

2000 *

6703

19

3000

6704

22

3000

6706

25

3000

6710

26

3500

6711

26

3500

6713

19

8500

6714

22

3500

6715

22

3500

6717

26

3500

6722

20

9000

6725

22

8800

6726

22

8800

Model

Screen Size

Chassis

6735

22

9600

6745

26

9800

6748

22

8800

6749

22

9800

6751

20

9000

6770

20

9900

6775

26

9600

720

25

2000

7758

20

4000

7762

26

4000

7773

20

9000

8721

19

8500

8778

20

9000

511

20

9905

TX9 Chassis

Model

Description

3755

14″ Movie Star Portable

3756

14″ Movie Start Portable with ultrasonic remote

3760

18″

3768

20″

3769

20″ with ultrasonic remote

3780

16″ Movie Star Portable

3781

16

3790

14″ Movie Star Portable

3792

22″

6771

14″ Portable

37023

16″ Teletext

37041

14″

37081

22″

37090

20″ Stereo

37093

20″ Stereo & Teletext

37100

20″

37101

20″

37103

20″

37350

20″

37351

20″

37353

20″ Teletext

37360

22″

37361

22″

37493

20″ Stereo & Teletext

37600

18″

37800

16″

37800

16″

37801

16″

6771

14″

16a3

16″

TX10 Chassis

Model

Description

3765

22″

3767

22 with infra-red remote control

3785

26″

3788

26″ with infra-red remote control

3791

22″

3795

22″ with Teletext and infra-red remote control

3796

26″ with Teletext and infra-red remote control

37060

22″ stereo

37063

22″ Stereo & Teletext

37340

22″

37341

22″

37363

22″ Teletext

37371

26″

37463

22″   stereo & Teletext

37850

26″

37953

22″ Teletext

37963

26″ Teletext

22b5

22″

TX90 Chassis

Model

Description

37003

20″ with Teletext and Infra-red remote control

37140

14″

37141

14″

MC01

14″ CTV Monitor

MC05

14″ CTV Monitor Peritel

14c1

14″

14c2

14″

16a1

16″

16a2

16″

20e1

20″

20e2

20″

TX100 Chassis

Model

Description

20a1

20″ 90 degree

20a2

20″ 90 degree

20a3

20″ 90 degree

20c3

20″ 90 degree

20g1

20″ 90 degree

20g3

20″ 90 degree

20h1

20″ 90 degree

20h2

20″ 90 degree

20h3

20″ 90 degree

22b1

22″ 110 degree

22b2

22″ 110 degree

22b3

22″ 110 degree

22b4

22″ 110 degree

22b5

22″ PC1560/PC1561

22d1

22″ 110 degree

22d2

22″ 110 degree

22d3

22″ 110 degree

22g1

22″ 110 degree

22g2

22″ 110 degree

22h1

22″ 110 degree

22h2

22″ 110 degree

26d1

26″ 110 degree

26d2

26″ 110 degree

26d3

26″ 110 degree

26g2

26″ 110 degree

26g3

26″ 110 degree

26h2

26″ 110 degree

26h3

26″ 110 degree

51a0

51cm FST 90 degree,I/R, Frequency Synthesis, FST

51a2

51cm FST 90 degree, I/R, Frequency Synthesis

51a3

51cm, 90 degree, I/R, Frequency Synthesis, teletext, FST

51a4

51cm, 90 degree, I/R, Frequency Synthesis, teletext, FST

51a5

51cm, 90 degree, I/R, Frequency Synthesis, teletext, FST

51a8

51cm, I/R ,90 degree, Sweep tuning, FST

51g2

51cm, I/R, 90 degree,Frequency Synthesis, FST

51g3

51cm, 90 degree, I/R, Frequency Synthesis, Fastext, FST

51h2

51cm, 90 degree, I/R, Sweep Tuning, FST

51h3

51cm, 9 degree,Sweep Tunig, Fastext, FST

51h4

51cm, I/R, Frequency Synthesis, Fastext, FST

51h5

51cm, I/R, Frequency Synthesis, Fastext, FST

51h8

51cm, I/R, Sweep Tuning, FST

59b2

59cm, I/R, 110 degree,Frequency Synthesis, FST

59b3

59cm, I/R,110 degree, I/R, Frequency Synthesis, teletext, FST

59b4

59cm, I/R, 110 degree, I/R, Frequency Synthesis, teletext, FST, Stereo

59b5

59cm, I/R, 110 degree, I/R, Frequency Synthesis, teletext, FST, Stereo

59b8

59cm, I/R, Sweep tuning, FST

59d2

59cm, I/R,Frequency Synthesis, FST

59d3

59cm,I/R,Frequency Synthesis, Teletext, FST

59g2

59cm,I/R,Frequency Synthesis, Fastext, FST

59g3

59cm, I/R, Frequency Synthesis, Fastext, FST

59h2

59cm,I/R, Sweep Tuning, FST

59h3

59cm,I/R,Sweep Tuning, Fastext, FST

59h4

59cm, I/R, Frequency Synthesis, Fastext, FST

59h4p

59cm, I/R, Frequency Synthesis, Fastext, FST, Peritel

59h5

59cm,, I/R, Frequency Synthesis, Fastext, FST

59j7

59cm,I/R,Sweep Tuning, Fastext, FST

66b2

66cm, I/R, Frequency Synthesis, FST

66b3

66cm, I/R, Frequency Synthesis, FST

66b5

66cm, I/R, Frequency Synthesis, FST

66b8

66cm,I/R, Sweep Tuning, FST

66h2

66cm,I/R,

66h3

66cm,I/R, Sweep Tuning, Fastext, FST

66h4

66cm, I/R, Frequency Synthesis, Fastext, FST

66h4p

66cm, I/R, Frequency Synthesis, Fastext, FST

66h5

66cm, I/R, Frequency Synthesis, Fastext, FST

TX85 Chassis

Model

Description

14d1

14″

14d2

14″ Sweep Tuning

14j1

14″

14j2

14″ Sweep Tuning

14j9

14″

MC09

14″ Monitor

TX86 Chassis

Model

Description

14l1

14″

14l2

14″ Sweep Tuning

14l9

14″

14m1

14″

14m9

14″

TX89 Chassis

Model

Description

14m2

14″ Frequency Synthesis, FST

36k2

36cm Frequency Synthesis, FST

TX90 Chassis

Model

Description

14c1

14″

14c2

14″ I/R, Sweep Tuning

16a1

16″

16a2

16″ I/R, Sweep Tuning

20e1

16″

20e2

20″ I/R, Sweep Tuning

37140

37141

I/R, Sweep Tuning

MC01

14″ Monitor

MC05

14″ Monitor, Peritel socket

37149

TX98 Chassis

Model

Description

36k3

36cm Frequency Synthesis, Fastext, FST

51p7

51cm Frequency Synthesis, Fastext, FST

TX99 Chassis

Model

Description

41h2

41cm I/R, Sweep Tuning, FST

41h3

41cm I/R, Sweep Tuning, Fastext, FST

51j7

51cm I/R, Sweep Tuning, Fastext, FST

51j8

51cm I/R,Sweep Tuning, FST

51k2

51cm I/R,Sweep Tuning, FST

51kc

51cm I/R, Sweep Tuning, Fastext, FST

ICC5 Chassis

Model

Description

51k4

51cm, Frequency Synthesis, Fastext, FST, Nicam,OSG,Peritel,
tune by remote, Child LCK,VCR by remote

51k4q

51cm, Frequency Synthesis, Fastext, FST, Nicam,OSG,Peritel,
tune by remote, Child LCK,VCR by remote,SVHS

51k5

51cm, Frequency Synthesis, Fastext, FST, Nicam,OSG,Peritel,
tune by remote, Child LCK,VCR by remote

51k7

51cm, Frequency Synthesis, Fastext, FST, OSG,Peritel,
tune by remote, Child LCK,VCR by remote

51l3

51cm, Frequency Synthesis, Fastext, FST, OSG,Peritel,
tune by remote, Child LCK,VCR by remote

51l7

51cm, Frequency Synthesis, Fastext, FST, OSG,Peritel,
tune by remote, Child LCK,VCR by remote

59l3

59cm, Frequency Synthesis, Fastext, FST, OSG,Peritel,
tune by remote, Child LCK,VCR by remote

59k4

59cm, Frequency Synthesis, Fastext, FST, Nicam,OSG,Peritel,
tune by remote, Child LCK,VCR by remote

59k4q

59cm, Frequency Synthesis, Fastext, FST, Nicam,OSG,Peritel,
tune by remote, Child LCK,VCR by remote,SVHS

59k5

59cm, Frequency Synthesis, Fastext, Nicam,OSG,Peritel
, tune by remote, Child LCK,VCR by remote,Super Planar Tube

59k7

59cm, Frequency Synthesis, Fastext, OSG,Peritel,
tune by remote, Child LCK,VCR by remote,Super Planar Tube

59l7

59cm, Frequency Synthesis, Fastext, OSG,Peritel,
tune by remote, Child LCK,VCR by remote, Super Planar Tube

59m2

59cm, Frequency Synthesis,  FST, Peritel
, tune by remote, Child LCK,VCR by remote

59p7a

59cm, Frequency Synthesis, Fastext, FST, OSG,Peritel,
tune by remote, Child LCK,VCR by remote

66m3

66cm, Frequency Synthesis, Fastext, FST, OSG,Peritel,
tune by remote, Child LCK,VCR by remote

68k4

68cm, Frequency Synthesis, Fastext, Nicam,OSG,Peritel,
tune by remote, VCR by remote,Super Planar Tube

68k4bq

68cm, Frequency Synthesis, Fastext, Nicam,OSG,Peritel,
tune by remote, Child LCK,VCR by remote,SVHS,Super Planar Tube

78m5

78cm, Frequency Synthesis, Fastext, FST, Nicam,OSG,Peritel,
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Red_to_Black
Guest
2 years ago

Thanks for taking the time to do this Chris.
model 3787 was made by Nordmende, the FV1 chassis I believe, although I could be wrong about the chassis designation it was definitely made by Nordmende, introduced as an interim model just before the TX9 to fill a gap as Thorn didn’t yet have a colour portable ready to sell, it was replaced by the TX9.

Red_to_Black
Guest
2 years ago

The differences between the ICC7 and ICC8 are superficially minimal! The chassis visually looked identical, no major step change here!
Basically Thomson updated the microprocessor, updated the firmware, catered for 16:9 switching and better S-Video inputs, altered the auto grey scale circuit, changed the tube base to use a single IC instead of discrete components amongst a few other changes, probably to cheapen production costs.
Few pcbs were compatible with the earlier chassis, in actual fact the main PCB along with PSU, line, field timebase remained basically the same.

It was more of an ICC7 mk2.

There were significant differences “behind the scenes” but I am still not sure whether it merited a whole new chassis number? , as it wasn’t a total redesign.
Whether this was a marketing decision ? who knows?
This is why I usually I refer to them together as “ICC7/8”

No doubt Thomson had a rethink partway through and tried to catch up with Philips ? again who knows?

Red_to_Black
Guest
2 years ago

Thomson pulled the same trick again before selling out to the Chinese!
We were just getting to grips with the ICC20 when they brought out the ETC210 Chassis.

Now for anyone getting to grips with Thomson nomenclature, this how it goes: ICC-X = international colour chassis MK-X, IKC-X = international kit chassis MK-X, ETC-X = European Television Chassis MK-X. They had a few LCD chassis with similar nomenclature, as well as a few Plasma sets along with a few vcr/tv combis which deviated a bit from normal naming convention.

Anyway the spinoff from the ‘normal’ ICC20/21 was a totally updated ‘small signal’ chipset to cater for HDMI inputs, but also completely redesigned the operating system end.

Not a bad thing in itself I might add, and a welcome improvement, it did have massive improvements over the previous system and was easier to navigate, however the basic chassis was still an ICC20/21 with a different front customer facing end but stilt he same basic chassis! Again I am not sure how this a completely different chassis ?

To be fair to Thomson they did physically separate the small signal stages from the power and line stages on separate pcbs, so it was half an update at best! ICC21.5 anyone ?

Tywyn-workshop
Member
3 months ago

Great to see these layouts again from the service manuals. My time was between the 800 Chassis and th 1400 Chassis, don’t think I touched the 1500. I remember that the 900/950 chassis had a buzzing noise and Thorn produced an ‘Anti Buzz Kit’. Basicaly a thick cardboard cut out to go between the mains transformer and the chassis.

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