Arcam T51 Service Manual

Service Manual

DiVA T51
AM/FM Tuner

T51

Issue 1.0

ARCAM

Contents List

!

Contents list

!

Circuit description

!

Circuit diagrams

!

Component overlays

!

Circuit board parts list

!

General assembly parts list

T51 Tuner Circuit Description

Power Supply

Mains voltage selection is made by placing a fuse, of
appropriate value, in the 115V or 230V position.
The single secondary is rectified and regulated and
supplies four regulat ors.

Z7 is always powered when the mains is connected and
keeps the pr eset memory of the micro controller intact.
The high-value capaci tor (C84) will keep this data sa fe, for
a limited time, in case of mains power failure.

Z5 provides the main 12V supply rail for the RF and audio
circuits. This is always connected, except for the supply to
the FM front end, which is di sabled by Q2 when t he unit is
turned 'off'.

Z4 powers the LED back light on the display PCB.

Z6 is the 5V digital supply for the micro controller.

FM Tuner & IF

The FM aerial input is mixed in the front end FE1 which
provides a 10.7MH z IF output. This is filtered and
amplified by ceramic filters CF1 & CF2 and the circuit
based around Q9 & Q10. A third filter CF3 can be put in
circuit by fitting jumpers JP1 & JP2 across pins 2 & 4 and
1 & 3 of SK6 respectively. This effectively narrows the IF
band to improve selectivity. Transistors Q17 and Q21 are
part of the AGC circuit. The po sition of the jumper link
JP7 to either SK10 or SK11 determines from which point
the AGC circuit is triggered. The default is for the jumper
to be fitted to SK10 which minimizes cross modulation
and prevents the IF amp becoming saturated.

The LA1266 (Z9) demodulates the IF at pin 1 into an
audio output at pin 12. The quadrature coil is a
double-tuned device for best distortion perform ance.

When a station is tuned correctly the 'On Tune' signal goes
low and drives a green LED on the display PCB. This
signal is also used by the auto-stop detection and muting
circuits.

AM Tuner & IF

The LA1266 (Z9) contains the AM RF amplifier, oscillator
and mixer circuitry.

Switching between FM and AM modes is controlled by the
'FM' signal from the micro controller which disables the
AM circuitry of Z9 and switches th e path of the audio
signal throug h Z8.

MW/LW switching is performed by switching transistors
Q12, Q14 & Q15.
Each band has its own oscillator and aerial tuning coils,
tuned by a varica p diode all contained within the AM
module L5.

The 450kHz IF signal is fi ltered by coil and ceramic filter
combination T5.

Birdie Filter

The ‘Birdie Filter’ (L2) is a four pole low pass filter, flat to
about 53kHz, then with a very steep roll off from then on..
This is designed to reduce co-channel interference in FM
Stereo and cut down on irritating ‘birdie’ noises.

Stereo Decoder

Stereo decoding is performed by LA3401 (Z8). The 38kHz
reference signal is accurately created by ceramic resonator
X3 and does not require adjus t ment.
Stereo sepa ration is adjusted for maximum by preset RV1.
This IC also contains FM/AM audio switching and muting
functions.

Audio Filter s & Output

The left and righ t channel audio out puts from Z8 are
filtered by the de-emphasis network of R1, C1 etc. The
correct de-emphasis network is selected by the position of
jumpers JP3 & JP4 on the pins of SK8. C2 & C102
(220pF) are selected for 50us and C3 & C103 (560pF) for
75us de-emph a sis .

The final filter, based on Z3, is a two-pole low-pass circuit
with a cut-off frequency of around 20kHz. Also included
is a 19kHz notch filter, L1 & C4, that removes most of the
residual pilot to ne.

Muting

When the power switch is turned off Q5 is switched off,
enabling the mute circuitr y of the stereo decoder (Z8) via
diode D9. This rem oves the need for output muting
transistors and elimin ates switchin g clicks and pops .
At switch-on the mute is enabled while C21 is charged via
Z8.

In normal use the mute inside Z8 is enabled in three other
ways:

The AMUTE signal from the mic r o controller is active at
power-on and for a short t ime when a preset is changed.
When the band is changed the output is muted by charging
C52.
The audio outpu t must be muted whenever the tuner is in
stereo mode and is also off-tune. This is to eliminate no ise
during tuning and is provided by Q8 and the MONO and
OFF TUNE control signals.
In Mono mode this mute is disabled so that weak stations
can be heard, despite the noise.

Micro controller

Control of the DiVA T51 tuner is performed by a single
micro controller Z10, LA7230. This also provides keypad
input and drives a LCD directly.

At power-on a matrix of diodes is scanned to set-up the
controller for the correc t options:

D7 selects the correct frequency ran ges.

D10 enables the use of Auto tuning as well as manual
tuning.

D8 allows the Auto-tuning mode to use the ‘IF Count’
method of search ing.

The position of jumpers JP 5 & JP6 fitted to SK9 are used
to disable or enable LW and also whether the AM band
steps are 9 kHz (UK) or 10 kHz (USA).

Z10 provides cont rol s ignal outputs for the following
functions:

MONO - To defeat the stereo decoder

AMUTE - Turns on the mute circuit when a button is
pressed & during tuning.

FM, MW & LW - Only one output active low at any one
time. Used to switch on specific parts of the RF circuitry as
appropriate.

The micro controller incl udes a Phase-Locked-Loop (PLL)
circuit which compares the tuner local oscillator signals
(FMIN & AMIN) with a reference frequency. B ased on
this information and the required tuned frequency the
controller varies the tuni ng voltage to the FM and AM
front ends.

The tuning voltages (FMVt & AMVt) have to be filtered
from the PLL by the circuitry around Q7 & Q13.

Display PCB

The display PCB holds the keypad, LCD display, LED
back light modu le and On-Tune indicator.

The remote control receiver consists of the receiver RX1
and the PIC micro controller, Z1, which is used to decode
the incoming remote control codes from RC5 format to
Sanyo type commands. This is because the Sanyo micro
controller, Z10, can only respond to Sanyo remote control
commands.

Jumper Settings

Jumper Option 1 Option 2

JP1 Best sensitivity Best sound
JP2 Best sensitivity Best sound
JP3 De-emphasis 50uS De-emphasis

75uS

JP4 De-emphasis 50uS De-emphasis

75uS
JP5 LW & MW MW only
JP6 AM spacing 9KHz AM spacing

10KHz
JP7 Less X-MOD Less De-sense

USA / Rest of the World

If the T51 is transferred from or to the USA the
following jumper settings will require changing.

Jumper Rest of the

World

JP3 50uS 75uS De-emphasis
JP4 50uS 75uS De-emphasis
JP6 9KHz 10KHz AM spacing

USA Action

87654321

D

LK22

LK23

LK24

LK25

LK26

LK27

LK31

LK32

LK33

LK34

LK35

LK36

LK37

LK41

LK43

LK44

LK45

LK46

LK47

LK51

LK52

LK53

LK54

D

LK55

LK56

LK57

C

FM/AM IF Demodulator
L892C2_1_2.SCH

Stereo decoder and Audio
L892C3_1_2.SCH

LK18

LK19

LK20

LK28

LK29

LK30

LK38

LK39

LK40

LK48

LK49

LK50

LK58

LK59

LK60

C

B

LCTR
HCTR
IFCNT
LO

SD
AMIN
SCAN

AMVt
FMVt

Microprocessor and PLL
L892C4_1_2.SCH

FMVt
AMVt

SCAN
AMIN
SD

LO
IFCNT
HCTR
LCTR

OFF TUNE

Power Mute

AM Audio
FM Audio

FM

LW

ON TUNE

ON TUNE

LW

FM

MW

PICMUTE

STEREO

MONO

AMUTE

AM Audio
FM Audio

Power Mute
FM

AMUTEOFF TUNE

MONO

STEREO

PICMUTE

Tooling & Fixing Holes

Tooling Holes

PD1

TOOLING

PD2

TOOLING

PD3

TOOLING

PD4

TOOLING

EL1

Update Box

UPDATE_BOX

Main PCB Fixing Holes

FIX1 FIX2 FIX3 FIX4FIX5

FIX6 FIX7 FIX8

PS

Photo Strip

PHOTO_STRIP

Photo Block

PHOTO_BLOCK

DD4

PCB MATERIAL

CEM1, 2 OZ Cu

CEM1_20Z

B

A

DRAWING TITLE

T51 Tuner

PCB

F3

T100MASP

L892PB_1

PCB

EL10

Cable

Tie

CABLE_TIE

DD1

Drilling

Detail

DRILL_DWG

Kit Mask
Exclude 'NF' parts from kit mask, i.e. Not Fitted.

This applies to R4 and R104

DD2

A2 Vertical

Paper Marker

DD_A2V

DD3

A2 Horizontal

Paper Marker

DD_A2H

A

Circuit Diagram

Notes:

00_1078

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

1 2 3 4 5 6 7 8

Filename

G:\DATA\ECO\ECO AGENDA\00_1078 L892 T51 TUNER\L892_1\L892_1.ddb - L892c1_1_2.prj

ECO No. DESCRIPTION OF CHANGE

Date Printed

CL 12/09/00 R93 WAS 220R NOW 1K0

CL 17/7/00 PRODUCTION RELEASE00-1044

INITIALS

12-Sep-2000

DATE

Drawn by:

CL

1 4Sheet of

DRAWING NO.

1.2

1

ISSUE

L892CT

P12V

87654321

D

AMVt

A_AMVT

6A
5A
4A

R29

10K MF

L5
AM_MODULE

1A
2A
3A

C27
100N PC

13

Q3
BC557B

R53

100K MF

6C

2

4C

1C
2C
3C

C34
10P CD

68K MF

C47
47N CD

T5 AM_IFT

R44

A_AMSIG2

C22
10U EL

+

R38

4K7 MF

R37

4K7 MF

Low = AM

F

C54

1U0 EL

+

A_AMSIG3

R16

22K MF

C50

47N CD

R78

22K MF

C49

47N CD

+

C53
1U0 EL

C48
47N CD

Q11

BC547B

R58
100K MF

R40
100K MF

FM

D

C

B

SK7

FMAMANT2

AM
Gnd

FM

A_AMRF

A_AMGND

6B

A_AMSIG1

P5V

R68

4K7 MF

LW

A_FMRF

1B
2B
3B4B

Q15

BC547B

A_LW

1

5

C75
1N0 CD

Ant

V Tune

88995566447

Cans

7

R24

2K7 MF

3D 4D
2D
1D

Q10
BC557B

R15
390R MF

FE1

6

MITSUMI_FE

Vcc

IF Out

LO Out

5D
6D

P12V

R87
4K7 MF

Q14
BC547B

R43

R51
10K MF

7

A_IFOUT

8

2K7 MF

AGC

R88

4K7 MF

D24

Q12

BC547B

Q17
ZVNL120

1N4148

R28
2K7 MF

C85

10N CD

R19

AMIN

SCAN

R72

Fit JP7 to SK10 for less cross-mod,
Fit JP7 to SK11 for less de-sensing.

R71

330R MF

6K8 MF

C41 10N CD

Q9
BC549B

R81

D25

C65 1N0 CD

A_AMLO

TP7

Mount Close to L3

1K2 MF

D27

1N4148

R83
1K0 MF

C30

10N CD

330R MF

1N4148

C24

10U EL

2
1

CF1
SFE10.7MLA

24

Z9
LA1266

AM Osc

FM I/P

1

A_FMIN

!

R47

+

10R FU

JP7

SK10

JUMPER

2WVERTJUMPER

2
1

21

22

23

Reg

Osc

AM I/P

GND4Quad 1

2

3

47N CD

C46

C45 47N CD

SK11

2WVERTJUMPER

20

IF out

5

B

19

AGC

A

18

Can

Can

IF in

Quad 2

6

3

4
6

1

17

AM adj

2

L3

L4

2

R56
5K6 MF

Q21
J112

R79
5K1 MF

Vcc

7

16

43

R52

TP6

R55

A_SMETER

16

S meter

On Tune8AFC9FM IF10AM IF11FM O/P

QUAD_COIL_A

QUAD_COIL_B

Link 1&3, 2&4 for best sound quality,
Link 3&5, 4&6 for best selectivity.

C67

JP2

1 2

JUMPER

3 4
5 6

15

AM O/P

C14

10N CD

47P CD

JP1

22R MF

22K MF

14

JUMPER

13

STRQ

12

+

C10
100U EL

IFCNT

R77

15K MF

!

R46

10R FU

10K MF

A_AMAUD

TP9

FMCENTRE

+

C23
10U EL

A_FMAUD

P12V

P12V

Q2
BC557B

R10

R69

18K MF

C71

1N3 PP

R75

1K2 MF

C86

100P PP

A_ONTUNE

R85

C31

+

10U EL

3K3 MF

R17
10K MF

C66

1

680P PP

2

3

Birdie Filter

L2

8

BIRDIE

+

C55
1U0 EL

R84

47K MF

4

R92

4K7 MF

5

7

C26

+

1U0 EL

6

P5V

R80

1K0 MF

AM Audio

C25

+

10U EL

C70

C69

A_FMBIRD

100P CD

100P CD

Q19

BC557B

C

FM Audio

LCTR

B

HCTR

SD

A

A_FMGND

FMVt

R94

4K7 MF

A_FMVT

C39

100N PC

C76

1N0 CD

Gnd

2

Gnd

3

Gnd

4

Case

A_FMLO

R89
10R MF

C42

22P CD

R66

220R MF

LO

C28

10N CD

R67

820R MF

R70

C38

68R MF

D26

10N CD

1N4148

R73 1M0 MF

CF2

SFE10.7MLA

C43 10N CD

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

R76

330R MF

R57

DRAWING TITLE

T51 Tuner

Filename

G:\DATA\ECO\ECO AGENDA\00_1078 L892 T51 TUNER\L892_1\L892_1.ddb - L892C2_1_2.SCH

C63

220R MF

Circuit Diagram

SK6 DIL6 VPLG

10N CD

CF3
SFE10.7MLA

Q6
BC547B

00_1078

+

C73

R20

100U EL

10K MF

CL 12/09/00 R93 WAS 220R NOW 1K0

R25

Power Mute

10K MF

00_1044 MGM 31/7/00 INITIAL RELEASE

ECO No. DESCRIPTION OF CHANGE

INITIALS

Date Printed

12-Sep-2000

DATE

Drawn by:

CAH/SJB

2 4Sheet of

DRAWING NO.

OFF TUNE

R93
1K0 MF

To 'On-Tune' LED on display

ON TUNE

A

1.2
1

ISSUE

L892CT

1 2 3 4 5 6 7 8

D

C

D16
1N4148

10K MF

D15
1N4148

OFF TUNE

D12
1N4148

PICMUTE

A_PMUTE

SK5

N L

34

IEC2

1

A_NEUT

T2
CM_CHOKE

R13

A_LIVE

P5V

R14
4K7 MF

D9
1N4148

!

AMUTE

Q8

BC547B

STEREO

A_230V

C74

100U EL

D13

D14

1N4148

P5V

4

+

1N4148

R86

4K7 MF

FM

AM Audio

FM Audio

R91
10K MF

A_STEREO

X3

CSB456

C11

10U EL

10N CD

+

A_FM

R11
82K MF

1

2

13

470K PSET

C29

R12
82K MF

22

AM I/P

FM I/P

ST LED

X in

21

RV1

C

C16

10U EL

Vcc

10

FM/AM

Sep Adj

4

R34 47K MF

+

R27

4K7 MF

15

Mute I/P

Comp O/P

3

C56
1N0 PP

C36

470N PE

C35

470N PE

20

PLL

18

C57

R41

5K6 MF

19

Vee

12

100N PE

17

Band mute

14

+

C52 2U2 EL

Q1

BC557B

R30

4K7 MF

+

16

Power Mute

9

+

C21 10U EL

R31
4K7 MF

C51
1U0 EL

Z8

LA3401

Mute O/P

11

L Out

L F/B

R F/B

R Out

R33
4K7 MF

Q4
BC547B

R49
22K MF

R1

91K MF

5

6

JP4 JUMPER
SK8 DIL6 VPLG
JP3 JUMPER

7

8

R101

91K MF

Q5

BC547B

C1

330P PP

C101

330P PP

P5V6

R36
4K7 MF

R26
4K7 MF

Q18

BC547B

C2
220P PP

50us 75us

1 2

3 4

5 6

C102

220P PP

De-emphasis selection.
Link 1&3 and 2&4 for 50us.
Link 3&5 and 4&6 for 75us.

Power Mute

+

R50

10K MF

C37

100U EL

R45 10R FU

R48
10K MF

C3
470P PP

R2
82K MF

R102
82K MF

C103

470P PP

R35
100K MF

!

R32
10K MF

NOT FITTED

NOT FITTED

A_MUTE

P12V

A_MONO

R3
12K MF

R4

R103
12K MF

R104

SW1C

9

12

8

11

MONO

7

10

L1

15MH_VAR

C4

4N7 PP

L101

15MH_VAR

C104

4N7 PP

D

R5
12K MF

C5

680P PP

E

R105
12K MF

C6

680P PP

C106

680P PP

C105
680P PP

R6
4K7 MF

3
2

R7
10K MF

+

C7
10U EL

R106
4K7 MF

5
6

R107
10K MF

+

C107
10U EL

Z3A

NJM2114

Z3B

NJM2114

87654321

P12V

84

C44
47N CD

C8

1

7

+

10U EL

R8
22K MF

C108

+

10U EL

R9

120R MF

R109

120R MF

R108
22K MF

A_LEFT

C9

100P CD

A_RIGHT

C109
100P CD

A_AUDGND

Z3C
NJM2114

1

SK4A

F

N

PHONO4

D

SK4B

4

F

EMC

N

PHONO4

C

C91
10N CD

B

2

F1

T100MA

!

F2

T160MA115V

230V

A_115V

115V

*

SW1D

A_SECA

12

5

6
7

T1
A52T_MAINS_TX

10

pin14
pin8
pin2
pin1

Not connected

A_SECB

UF4003

C61

C59

UF4003

D20

1N0 CD

1N0 CD

D18

UF4003

UF4003

C62

C60

D21

1N0 CD

D19

1N0 CD

TP1

C58

3M3 EL

P12V

SW1A

O

P5V

+

Digital
Power
Supply

C18
100U EL

I

VBL

Z5 7812

I

+

TO220HS30

HS1

Vin

Vout

GND

G

O

Audio &
RF
Power
Supply

TP2 TP3 TP4 TP5

+

C72
100U EL

A_SWA

A_P12V

3

6

SW1B

1

2

4

5

I

A_SWB

TO220HS30REG

Z4 7812

Vin

HS2A

GND

G

Vout

O

Backlight
Power
Supply

A_VBL A_P5V A_P5V6

+

C20
100U EL

I

+

C32
1U0 EL

Z6 7805

Vin

Vout

GND

G

Z7
7805

Vin

GND

G

D22
1N4003F

Vout

O

P5V6

+

Back-up
Power
Supply

C68
100U EL

B

A

A_GND

C40
10N CD

DRAWING TITLE

T51Tuner

A & R Cambridge Ltd.

00_1078

Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

Filename

G:\DATA\ECO\ECO AGENDA\00_1078 L892 T51 TUNER\L892_1\L892_1.ddb - L892C3_1_2.SCH

1 2 3 4 5 6 7 8

Circuit Diagram

ECO No. DESCRIPTION OF CHANGE

CL 12/09/00 R93 WAS 220R NOW 1K0

INITIAL RELEASE00-1044 MGM 31/7/00

INITIALS

Date Printed

12-Sep-2000

DATE

Drawn by:

CAH/SJB

3 4Sheet of

DRAWING NO.

A

1.2

1

ISSUE

L892CT

87654321

P12V

!

D

C

B

FMVt

AMVt

Q16

BC547B

P5V

R42
15K MF

BC547B

R60

100K MF

R61

100K MF

TP8

Q13

R22

4K7 MF

Default = Low

C19 15N PE

R21
2K7 MF

Q7

BC547B

SK3

P5V

1
2
3
4
5
6
7
8
9
10

To Remote Control PCB

FFC10V

STEREO

FM

MW

LW

MONO

IFCNT

AMUTE

JP6 JUMPER
SK9 DIL6 VPLG
JP5 JUMPER

C33

10N CD

C17

+

1U0 EL

A_REMIN

PICMUTE

A_AMUTE

AMute

Link 1&3 for LW and MW.
Link 3&5 for MW only (AM).
Link 2&4 for 9KHz AM spacing.
Link 4&6 for 10KHz AM spacing.

D11

9kHz 10kHz

LW AM

1 2

3 4

5 6

D23
1N4148

B0

'LW'

+

C15
100U EL

R18

10K MF

1N4148

R23

100R FU

SD

D7

D8

D10

C80

33P CD
C82

33P CD

Shift

1N4148

IFCNT

1N4148

AMAN

1N4148

Q_1

Q_2

Q_3

Q_5
Q_6
Q_7
Q_8

Q_9

Q_11
Q_12
Q_13

X1

4.500MHZ

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

HCTR
LCTR
LO
AMIN

80

XIN

XOUT

TEST 1
REMO
STEREO
K5
K4
VOL
FM
MW
LW
SW1/VU
SW2/VD
MO/ST
MUTE
CE
DO
CLK
IFCNT
NARROW
PWROUT
AMUTE
STB
T7
T6

T525T426T327T228T129T030Vdd31K332K233K134K035S2836S2737S2638S2539S24

Q_14

79

78

EO2

TEST 2

77

EO1

76

75

Vss

74

73

FMIN

AMIN

D5

D4

D3

D2

71

72

Vdd

SNS

1N4148

1N4148

1N4148

1N4148

69

70

LCTR

HCTR

68

SD

67

RES

A_T0

A_T1

A_T2

A_T3

65

66

COM1

INT

HOLD

COM2

40

R39 10K MF

Z10

LC7230

S1
S2
S3
S4
S5
S6
S7
S8

S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23

64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41

+

C84
0F1 EL

C13
10N CD

Q_15

R215

R216 1K0 MF

C12 10N CD

R214

A K0

P5V

VBL

D17

1N4003F

1K0 MF

1K0 MF

A_K1

A_K2

R54 220R 1W CF

R59

P5V6

L201

33UH AX

+

C78

100U EL

A_K3

220R 1W CF

P5V

R205 1K0 MF
R206 1K0 MF

R207 1K0 MF
R208 1K0 MF

R209 1K0 MF
R210 1K0 MF
R211

R212 1K0 MF

R213 1K0 MF

SK2

FFC22V

1K0 MF

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22

SK1

FFC22V

D28

ON TUNE

A_COM1
A_COM2
A_S1
A_S2
A_S3
A_S4
A_S5
A_S6
A_S7
A_S9
A_S10
A_S11
A_S12
A_S13
A_S14
A_S15
A_S16
A_S17
A_S18
A_S19
A_S20

A_S21
A_S22
A_S23
A_S24
A_S25
A_S26
A_S27
A_S28

AMute

1N4148

R74

R82

C64

4M7 MF

330R MF

47N CD

SCAN

Q22
ZVNL120

D

Q20
ZVNL120

D29
1N4148

C

B

A

R62

10K MF

R65

10K MF

D1

D6

A_T4

1N4148

A T5

1N4148

R63

220R 1W CF

R64

220R 1W CF

DRAWING TITLE

T51 Tuner

A & R Cambridge Ltd.

00_1078

Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

Filename

G:\DATA\ECO\ECO AGENDA\00_1078 L892 T51 TUNER\L892_1\L892_1.ddb - L892C4_1_2.SCH

1 2 3 4 5 6 7 8

Circuit Diagram

ECO No. DESCRIPTION OF CHANGE

CL 12/09/00 R93 WAS 220R NOW 1K0

INITIAL RELEASE00_1044 MGM 31/7/00

INITIALS

Date Printed

12-Sep-2000

DATE

Drawn by:

CAH/SJB

4 4Sheet of

DRAWING NO.

A

1.2

1

ISSUE

L892CT

D

D_TUNE

LED2

LED GREEN3.1MM

SK201
FFC22H

21

22

1

20

2

19

18

17

5

16

11

15

14

21

13

12

7

11

8

10

9

9

10

8

12

7

13

6

14

5

15

4

16

3

17

2

18

1

19

22

23

24

25

26

27

28

29

D_K0
D_K1
D_K2
D_K3
D_T0
D_T1

D_T3

30

D_T4

D_T5

SK202

22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

VBL1

P5V1

D_P5V

MONO AUTO DOWN UP STORE BAND 1-9 2-10 3-11 4-12 5-13 6-14 7-15 8-16

SW206
TACTSW2

SW214
TACTSW2

SW213
TACTSW2

SW212
TACTSW2

SW211

TACTSW2

SW205

TACTSW2

SW204

SW203

TACTSW A1508

SW202

TACTSW A1508

SW210

TACTSW A1508

TACTSW A1508

SW209

SW208

TACTSW A1508

SW201

TACTSW A1508

TACTSW A1508

SW207

87654321

D

TACTSW A1508

C

EL2

LCD

Chair

E875PM

EL3

DISP1
A52T LCD

SEG13SEG24SEG3

COM1

COM2

MONO STEREO AUTO NBIF STORE

FM
AM

LW

BL1

SEG4

188.8 18

SEG76SEG9

SEG520SEG6

SEG10

SEG11

SEG12

SEG13

SEG14

SEG15

8

SEG16

SEG17

SEG18

kHz
MHz

SEG19

SEG20

SEG21

SEG22

SEG23

SEG24

SEG25

SEG26

SEG27

SEG28

N/C

K

A

FFC22H

VBL1

D_VBL

D_GND

R204

220R MF

P5V1

C

LED1
LED GREEN3.1MM

B

LCD

Chair

E875PM

MCD_BACKLIGHT

FIX1 FIX2 FIX3 FIX4

FIX5 FIX6

FIX7 FIX8 FIX9

P5V

R3

3R3 FU

C3

10U EL

SK1

1

MUTE O/P

Remote O/P

FM/AM

3

GND

1

+5V

Case

O/P

2

RX1
SBX1610-52

+

FFC10H X1

2
3
4
5
6
7
8
9
10

P5V

330R MF

1
2
3
4
5
6
7
8
9

R1

Z1

RA2
RA3
RTCC
MCLR
VSS
RB0
RB1
RB2
RB3

RA1

RA0
OSC1
OSC2

VDD

RB7

RB6

RB5

RB4

18
17
16
15
14
13
12
11
10

CST4.00

10U EL

1N4148

+C4

D1

C2

10N CD

R2

10K MF

+

C1
10U EL

B

A

EL1

Update Box

UPDATE_BOX

PCB1

PCB

L893PB_2

DD3

A2 Horizontal

Paper Marker

DD_A2H

DD4

PCB MATERIAL

FR4, 1 OZ Cu

FR4_1OZ

DD2

A2 Vertical

Paper Marker

DD_A2V

EL4

Layout by

CLOGO

Cliff

DD1

Drilling

Detail

DRILL_DWG

PS1

Photo Strip

PHOTO_STRIP

A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB

DRAWING TITLE

T51 DISPLAY BOARD

Circuit Diagram

Filename

G:\DATA\ECO\ECO AGENDA\00_1081 L893 T51 TUNER DISPLAY\L893_1\L893_1.ddb - L893c1_2.sch

PIC16C54

00_1081

MECHANICAL MODSCL 13/09/00

PRODUCTION RELEASECL 31/7/00

ECO No. DESCRIPTION OF CHANGE

INITIALS

Date Printed

15-Sep-2000

DATE

Drawn by:

CL

1 1Sheet of

DRAWING NO.

A

2.0

1.0

ISSUE

L893CT

1 2 3 4 5 6 7 8

T51 Main Board L892_ 1. 2

Reference Description Part

C1 PPRO 330P 5% 63V RA 2D133
C2 PPRO 220P 5% 63V RA 2D122
C3,C4 PPRO 470P 63 V 5% RA 2D147N
C5,C6 PPRO 680P 5% 63V RA 2D168
C7,C8 ELST 10U 50V 2N610
C9 CERD 100P 63V 2A110
C10 ELST 100U 25V 2N710
C11 ELST 10U 50V 2N610
C12-C14 CERD 10N 63V -2 0% +80% RA 2A310
C15 ELST 100U 25V 2N710
C16 ELST 10U 50V 2N610
C17 ELST 1U0 50V 2N510
C18 ELST 100U 25V 2N710
C19 PEST 15N 63V 10% 2K315
C20 ELST 100U 25V 2N710
C21-C25 ELST 10U 50V 2N610
C26 ELST 1U0 50V 2N510
C27 PCRB 100N 10 0V 5% RA 5mm 2H410
C28-C30 CERD 10N 63V -2 0% +80% RA 2A310
C31 ELST 10U 50V 2N610
C32 ELST 1U0 50V 2N510
C33 CERD 10N 63V -20% +80% RA 2A310
C34 CERD 10P 63V 20% RA 2A010
C35-C36 PEST 470N 63V 1 0% 2K447
C37 ELST 100U 25V 2N710
C38 CERD 10N 63V -20% +80% RA 2A310
C39 PCRB 100N 10 0V 5% RA 5mm 2H410
C40-C41 CERD 10N 63V -2 0% +80% RA 2A310
C42 CERD 22P 63V 20% RA 2A022
C43 CERD 10N 63V -20% +80% RA 2A310
C44-C50 CERD 47N 63V -2 0% +80% RA 2A347
C51-C55 ELST 1U0 50V 2N510
C56 PPRO 1N0 5% 63V RA 2D210
C57 PEST 100N 63V 10% 2K410
C58 ELST 3M3 25V 2N833
C59-C63 CERD 1N0 63V 2A210
C64 CERD 47N 63V -20% +80% RA 2A347
C65 CERD 1N0 63V 2A210
C66 PPRO 680P 5% 63V RA 2D168
C67 CERD 47P 63V 20% RA 2A047
C68 ELST 100U 25V 2N710
C69-C70 CERD 100P 63V 2A110
C71 PPRO 1N3 63V 5% RA 2D213N
C72-C74 ELST 100U 25V 2N710
C75,C76 CERD 1N0 63V 2A210
C78 ELST 100U 25V 2N710
C80,C82 CERD 33P 63V 20% RA 2A033
C84 ELCAP 0F1 5V MEMORY

BACKUP
C85 CERD 10N 63V -20% +80% RA 2A310
C86 PPRO 100P 63V 5% RA 2D110N
C91 CERD 10N 63V -20% +80% RA 2A310
C101 PPRO 330P 5% 63V RA 2D133
C102 PPRO 220P 5% 63V RA 2D122
C103,C104 PPRO 470P 63V 5% RA 2D147N

C105,C106 PPRO 680P 5% 63V RA 2D168

C107,C108 ELST 10U 50V 2N610

C109 CERD 100P 63V 2A110
CF1-CF3 CER FILT SFE10.7ML-A RED 7M002
D1-D16 SSDIODE 1N4148 75V 3A4148
D17 RECTIFIER 1N4003F 1A 200V 3B4003
D18-D21 ULTRAFAST RECTIFIER

DIODE UF4003 1A

Number

2X010

3B4003F

D22 RECTIFIER 1N4003F 1A 200V 3B4003
D23-D29 SSDIODE 1N4148 75V 3A4148
EL10 CABLE TIE PLT2.5 F042
F1 FUSEHOLDER 20mm PCB 8S004
F1 INS COVER PCB

FUSEHOLDER
F1 SPARE FUSE 20mm 100mA T C11106
F2 INS COVER PCB

FUSEHOLDER
F2 FUSEHOLDER 20mm PCB 8S004
F3 SPARE FUSEHOLDER F062
F3 SPARE FUSE 20mm 100mA T C11106
FE1 TUNER HEAD FM FE417-G02 B007
HS1,HS2 HEATSINK TO220 CLIP 30 F007
JP1-JP7 JUMPER SOCKET 0.1'' 8K004
L1 INDUCTOR VAR 15mH

CLNS35-05148
L2 VARIND BIRDIE A257BLR-

3670N
L3 VARIND QUAD M292MEA-

2399FKG
L4 VARIND QUAD M292MEA-

2198X
L5 VARIND AM TUNING

BLOCK
L101 INDUCTOR VAR 15mH

CLNS35-05148
L201 33UH IND 34-48330 7D033
PCB PRINTED CIRCUIT BOARD L892PB_1
Q1-Q3 TRANS LF SS P BC557B 4A557
Q4-Q8 TRANS LF SS N BC547B 4A547
Q9 TRANS LF SS N BC549B 4A549
Q10 TRANS LF SS P BC557B 4A557
Q11-Q16 TRANS LF SS N BC547B 4A547
Q17 TRANS MOSFET SW

ZVNL120A
Q18 TRANS LF SS N BC547B 4A547
Q19 TRANS LF SS P BC557B 4A557
Q20 TRANS MOSFET SW

ZVNL120A
Q21 TRANS JFET N J112 4J112
Q22 TRANS MOSFET SW

ZVNL120A
R1 RES MF W4 1% 91K 1H391
R2 RES MF W4 1% 82K 1H382
R3 RES MF W4 1% 12K 1H312
R4 RES MF W4 1% NOT 1H000
R5 RES MF W4 1% 12K 1H312
R6 RES MF W4 1% 4K7 1H247
R7 RES MF W4 1% 10K 1H310
R8 RES MF W4 1% 22K 1H322
R9 RES MF W4 1% 120R 1H112
R10 RES MF W4 1% 10K 1H310
R11,R12 RES MF W4 1% 82K 1H382
R13 RES MF W4 1% 10K 1H310
R14 RES MF W4 1% 4K7 1H247
R15 RES MF W4 1% 390R 1H139
R16 RES MF W4 1% 22K 1H322
R17,R18 RES MF W4 1% 10K 1H310
R19 RES MF W4 1% 6K8 1H268
R20 RES MF W4 1% 10K 1H310
R21 RES MF W4 1% 2K7 1H227
R22 RES MF W4 1% 4K7 1H247
R23 RES MF FU W3 5% 100R

NFR25
R24 RES MF W4 1% 2K7 1H227
R25 RES MF W4 1% 10K 1H310
R26,R27 RES MF W4 1% 4K7 1H247
R28 RES MF W4 1% 2K7 1H227
R29 RES MF W4 1% 10K 1H310
R30,R31 RES MF W4 1% 4K7 1H247

F022

F022

7E008

7E001

7E002

7E003

7E004

7E008

4K120

4K120

4K120

1G110

R32 RES MF W4 1% 10K 1H310
R33 RES MF W4 1% 4K7 1H247
R34 RES MF W4 1% 47K 1H347
R35 RES MF W4 1% 100K 1H410
R36-R38 RES MF W4 1% 4K7 1H247
R39 RES MF W4 1% 10K 1H310
R40 RES MF W4 1% 100K 1H410
R41 RES MF W4 1% 5K6 1H256
R42 RES MF W4 1% 15K 1H315
R43 RES MF W4 1% 2K7 1H227
R44 RES MF W4 1% 68K 1H368
R45-R47 RES MF FU W3 5% 10R

R48 RES MF W4 1% 10K 1H310
R49 RES MF W4 1% 22K 1H322
R50,R51 RES MF W4 1% 10K 1H310
R52 RES MF W4 1% 22R 1H022
R53 RES MF W4 1% 100K 1H410
R54 RES CF 1W 220R 5% 1E122
R55 RES MF W4 1% 22K 1H322
R56 RES MF W4 1% 5K6 1H256
R57 RES MF W4 1% 220R 1H122
R58 RES MF W4 1% 100K 1H410
R59 RES CF 1W 220R 5% 1E122
R60,R61 RES MF W4 1% 100K 1H410
R62 RES MF W4 1% 10K 1H310
R63,R64 RES CF 1W 220R 5% 1E122
R65 RES MF W4 1% 10K 1H310
R66 RES MF W4 1% 220R 1H122
R67 RES MF W4 820R 1% 1H182
R68 RES MF W4 1% 4K7 1H247
R69 RES MF W4 1% 18K 1H318
R70 RES MF W4 68R 1% 1H068
R71 RES MF W4 1% 330R 1H133
R72 RES MF W4 1% 1K2 1H212
R73 RES MF W4 1% 1M0 1H510
R74 RES MF W4 1% 4M7 1H547
R75 RES MF W4 1% 1K2 1H212
R76 RES MF W4 1% 330R 1H133
R77 RES MF W4 1% 15K 1H315
R78 RES MF W4 1% 22K 1H322
R79 RES MF W4 1% 5K1 1H251
R80 RES MF W4 1% 1K0 1H210
R81 RES MF W4 1% 330R 1H133
R82 RES MF W4 1% 330R 1H133
R83 RES MF W4 1% 1K0 1H210
R84 RES MF W4 1% 47K 1H347
R85 RES MF W4 1% 3K3 1H233
R86-R88 RES MF W4 1% 4K7 1H247
R89 RES MF W4 1% 10R 1H010
R91 RES MF W4 1% 10K 1H310
R92 RES MF W4 1% 4K7 1H247
R93 RES MF W4 1% 1K0 1H210
R94 RES MF W4 1% 4K7 1H247
R101 RES MF W4 1% 91K 1H391
R102 RES MF W4 1% 82 K 1H382
R103 RES MF W4 1% 12 K 1H312
R104 RES MF W4 1% NOT 1H000
R105 RES MF W4 1% 12 K 1H312
R106 RES MF W4 1% 4K7 1H247
R107 RES MF W4 1% 10 K 1H310
R108 RES MF W4 1% 22 K 1H322
R109 RES MF W4 1% 120 R 1H112
R205 RES MF W4 1% 1K0 1H210
R206­R216
RV1 PRES 470K LIN HORIZ 6F447
SK1 22-WAY FFC CONN 8K8022
SK2 22-WAY FFC CONN 8K8022
SK3 10-WAY FFC CONN VERT 8K8010

NFR25

RES MF W4 1% 1K0 1H210

1G010

SK4 PHONO SKT 4-WAY EMC 8D224
SK5 IEC MAINS 2-PIN PCB 8A014
SK5 COPPER RIVET TCP/D48 BS HP007
SK6 6-WAY VERT DIL PIN

SK7 FM/AM PCB COAX & CLIPS 8H116
SK8,SK9 6-WAY VERT DIL PIN

SK10,SK11 2WAY MOLEX VERT MALE

SW1 SW PUSH 4PCO PBT A1014
T1 ALPHA 5.2 TUNER MAINS

T2 Mains common mode choke 7E030
T5 FILTER CERAMIC AM IF 7M008
X1 CRYSTAL 4.500MHz

X3 CER RESON CSB456 456kHz 7W003
Z3 IC OPAMP DUAL NJM2 114D 5B2114
Z4,Z5 IC VREG POS 7812 5D7812
Z6,Z7 IC VREG POS 7805 5D7805
Z8 IC RADIO LA3401 5C3401
Z9 IC RADIO LA1266 5C1266
Z10 IC TUNER LC7230 5C7230

HEADER

HEADER

CONNECTOR

TRANSFORMER

PARALLEL

T51 Display Board L893_2

Reference Description Part

BL1 MCD BACKLIGHT L802ML
C1 ELST 10U 50V 2N610
C2 CERD 10N 100V 20% 2A310
C3 ELST 10U 50V 2N610
C4 ELST 10U 50V 2N610
D1 SSDIODE 1N4148 75V 3A4148
DISP1 ALPHA 5.2 TUNER LCD E802MC
EL2 LCD chair support E875PM
EL3 LCD chair support E875PM
LED1 LED GRE EN 3 1MM SLR-

LED2 LED GRE EN 3 1MM SLR-

PCB1 PRINTED CIRCIUT BOARD L893PB_2
R1 RES MF W4 1% 330R 1H133
R2 RES MF W4 1% 10K 1H310
R3 RES MF FU W3 5% 3R3

R204 RES MF W4 1% 220 R 1H122
RX1 REMOTE RX SBX1610-52

SK1 10-WAY FFC CONN HORIZ 8K8110
SK201 22-WAY FFC C ONN HORIZ 8K8122
SK202 22-WAY FFC C ONN HORIZ 8K8122
SW201­204

SW205 TACT SWITCH 2-PIN LOW

SW206 TACT SWITCH 2-PIN LOW

SW207­210

SW211­214
X1 CER RESON 4.00MHz 7W005
Z1 IC SOCKET 18 PIN 0.3'' 8S018
Z1 IC CMOS MICRO

37MG3F

37MG3F

NFR25

38KHZ

TACT SWITCH 2-PIN LOW

PROF 9.5mm ACTUATOR

SKHVPH

PROF

PROF

TACT SWITCH 2-PIN LOW

PROF 9.5mm ACTUATOR

SKHVPH

TACT SWITCH 2-PIN LOW

PROF

PIC16C54XT/P

8K6306

8K6306

8K6201

L807TX

7X017

Number

3D007

3D007

1G833

B2103

A1508

A1504

A1504

A1508

A1504

5H16C54
X

T51 General Assembly Parts List

ITEM 230V

11

12

13

16

17

18

19

25

26
27
28
30
40
41
42

A

B

C

D

1

2

3

7

9

L813RC

8H014

8H012

8H015

E907RP

E814SP

E810CH

5H16C54X

E870PM

E879PM

C11106
100mA AS

F022

WT51U 1A

WT51U 2A

L831CA

L819CA

H006

K1004

L807TX

HE6V06B

HF4V09B

HA3V10A

115V

C11166
160mAS

L807TX

100V

SILVER

E828CP

E971AY

BLACK

E827CP

E988AY

DESCRIPTION

REMOTE CONTROL

COAXIAL AREAL ADAPTER

FM AERIAL

AM AERIAL LOOP

REAR PANEL

SUB PANEL

CHASSIS

COVER PLATE

FASCIA ASSEMBLY

IC CMOS MICRO PIC16C54XT/P + L809SW

MAINS BUTTON

FOOT

MAINS FUSE

FUSEHOLDER COVER

T51 MOTHER PCB ASSEMBLY L892AY

T51 DISPLAY PCB ASSEMBLY L893AY

22-WAY FLEX-FOIL

10-WAY FLEXFOIL

SNAP IN SPACER

COPPER ADHESIVE TAPE

TRANSFORMER

No. 6 x 6mm SCREW

No. 4 x 9mm SCREW

M3 x 10mm SCREW

WHERE USED QTY

DISPLAY PCB

REMOTE PCB

CUT FROM ROLL

1

1

1

1

1

1

1

1

1

1

1

4

2

2

1

1

2

1

1

50MM

1

6

17

7

T51 General Assembly Parts List

ITEM 230V

43
44

49
52
55

57
58

59

66
69
70
71

HA3V06A

E82801

F042

E806MI

E807BG

F163

K5408

F062

E879SL

E859PM

HL4AF

115V

100V

SILVER

HA4V06S

BLACK

HA4V06B

DESCRIPTION

M4 X 6mm SCREW

M3 x 6mm SCREW

FOAM PAD

CABLE TIE

MAINS INSULATOR

DISPLAY WINDOW GASKET

DAMPING TAPE

LIGHT PIPE SLEEVING (6mm)

FUSE CLIP

CONFIGURA TION LABEL

TUNER TACT S WITCH LENS BUTTON

RED FIBRE WASHER

WHERE USED QTY

INSIDE LID ABOVE FLEX CABLE

TRANSFORMER TO PCB

4

9

2

1

1

1

.02RE
EL

1

2

1

8

2