Philips AZ1550 Service Manual

From week 0135 onwards, the Conrol Board and the Keyboard are changed because a
new Microprocessor IC (7405) is used.

For servicing, please refer to the attached pages.

Wiring Diagram......................................................................6 - 2

Control board - circuit & layout diagram......................9 - 3 ..9 - 4

Keyboard - circuit & layout diagram ....................................12 - 2

Electrical partslist.....................................................16 - 7..16 - 8

Note :
Code number of new boards : 3140 113 3254x Key board

3140 113 3256x Control board

Service Information

SSeerrvviiccee
SSeerrvviiccee

Service

Product Service Group CE Audio

AZ 1550

A01-556

© 3140 785 22850

2001-09-28

Already published Service Informations: A01-552 3140 785 22780

INTENTIONAL LEFT BLANK

6 - 26 - 2

WIRING DIAGRAM

TAPE DECK

+

71

ECO-MTF-MS

ATM 5

(For AZ1550)

LEAF DOOR SWITCH

73

FE-ST-VK-N

+TAPE

REC_INFO

+MOTOR

HYRW

ATM5 2B

8110

L

GND

R

+TUNER

+FM

FE-ST-VK-N

FE-ST-VK-N

LI

RI

GND

LO

RO

EH-S

GND

+1

1725

1702

ATM5 3B

8110

L

GND
R

+TUNER

+FM
+LW

8626
180mm

8802

140mm

8625

180mm

8105
400mm

1821

EH-B

FE-ST-VK-N

1251

LO
RO
GND
LI

1625

+B
RI

FE-ST-VK-N

L
GND
R

+TUNER

+FM

+LW

CD99 DA11

L

GND

R

L

R

GND

1800

+CD

8800
280mm

FE-ST-VK-N1801

+CD

CD-DRIVE

DA11

15

1

1823

+A

GND

FE-ST-VK-N

+A

GND

Feature Board

CLK

MONO_ST

DATA

61

FE-ST-VK-N

SILD
SICL

DATA

GND

/PORE

DOOR_SW

+TUNER

ENABLE

2

1

1801

IS

3

1824

DBB

4

8400

FE-ST-VK-N

KEY_IS

KEY_DBB

1500

EH-S

5

6

8550

8801

180mm

J1

KEY_EQ

7

220MM

140mm

1400

GND

GND

+A_ON

GND

GND

MUTE

ALC

FE-ST-VK-N

1420

KEY1

GND

REC_INFO

GND

Supply

REC_INFO

KEY2
GND

FE-ST-VK-N

KEY1
KEY2
GND

+B

1406
FE-ST-VK-N

1005

EH-B
+B

GND

1007
PH-B

1013

1405

8402
AD

80mm

8250

400mm

8803

180mm

(For AZ1565 only)

VERSION

/00/05/10/13/14

Copper foil

/01/11/11H

/17

1014

EH-B
Supply

GND

0001
0002
0003

ITEM

0001

RED

BLUE

BLUE

Power
Board

1

2

Transformer

1009
XH-B

0002

ORANGE

1015

DC

GND

PH-B

0003

RED

BLACK

BLUE

8251
180mm

+

Battery

Keyboard

FE-ST-VK-N

1407

SILD
SICL

DATA
GND
/PORE
DOOR_SW

KEY_IS

IS

DBB

ENABLE

DATA

CLK

8500

+TUNER

180mm

MONO_ST

J2

1550

+A

+1

+B

FE-ST-VK-N

R

L

KEY_DBB

FE-ST-VK-N

J1

KEY_EQ

MUTE

+A_ON

GND

1

2

3

4

5

6

7

1006
EH-B

LCD

1402

GND

FE-BT-VK-N

1000

ALC

L

GND

R

+B

GND

+1

+A

1004

REC_INFO

J2

EH-B

+1

FE-ST-VK-N

+MOTOR

GND

SCL/Search_mute

Control
Board

SDA/PWM

+A

GND

8401

140mm

+A

GND

SDA/PWM

SCL/Search_mute

AF Board

1003
EH-B

-

3.8M
8103

8104
280mm

8501

480mm

4 OHM

80mm80mm

Tweeter

8 OHM

2129
4u7

8502
220mm

80mm

80mm

4 OHM 8 OHM

Tweeter

LeftRight

2130
4u7