Philips AZ1050 Service Manual

CD Stereo Radio Recorder

AZ1050 AZ1055

all versions

TABLE OF CONTENTS

chapter

Handling chip components and safety 1 - 1 Technical Specification & Service Tools 2 - 1 Service Measurement 2 - 2 Connections & Controls Instructions for use Disassembly Diagram 4 - 1 CD Service Test Program 4 - 2 to 4 - 3

Block Diagram Wiring Diagram 5 - 2

TUNER BOARD

circuit diagram layout diagram

COMBI BOARD

circuit diagram layout diagram

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3 - 1

3 - 2 to 3 - 5

5 - 1

6 - 1 6 - 2

7 - 1, 7 - 3, 7 - 5

7 - 2, 7 - 6

FRONT BOARD

circuit diagram layout diagram

EXPLODED VIEWS DIAGRAM

cabinet tape deck

Mechanical partslist Electrical partslist

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chapter

7 - 4 7 - 4

8 - 1 8 - 2

8 - 2

9 - 1 to 9 - 4

Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

Printed in The Netherlands Copyright reserved Subject to modification

PCS 107 205

CLASS 1

LASER PRODUCT

3140 785 22620Published by SS 0105 Service Audio

TECHNICAL SPECIFICATIONS

2-1

GENERAL

Mains voltage

Mains frequency-/00/05/10/14 : 50 Hz

Battery mains : 9 V (R20 x 6) Power consumption : 5 W

Dimension (W x H x D) : 435 x 252 x 170 mm Weight : 3.4 Kg

-/00/05/10/14

-/01/11 : 120 / 230 V

-/01/11 : 50 / 60 Hz

Remote : 3V (R6 x 2)

: 230 V

-/17 : 120 V

-/17 : 60 Hz

AMPLIFIER

Output power mains : 2 x 1.4 W

battery : 2 x 1.6 W Speaker impedance : 2 x 4 ohm Frequency response : 100 Hz - 10 kHz (±3dB)

TUNER - FM SECTION

Tuning range : 87.5 - 108 MHz IF frequency : 10.7 MHz ± 0.2 MHz Sensitivity : 14 dBf at 26dB S/N Selectivity : 45 dB at 300kHz IF rejection : 65 dB Image rejection : 26 dB

TUNER - AM SECTION

Tuning range MW : 522 - 1607 kHz

-/17 : 520 - 1730 kHz IF frequency : 468 kHz ± 3 kHz Sensitivity MW : 1500 µV/m at 26dB S/N Selectivity MW : 20 dB IF rejection MW : 60 dB Image rejection MW : 32 dB

AUDIO CASSETTE RECORDER

Number of tracks : 2 stereo Tape speed : 4.76 cm/sec ± 3% Wow & flutter : < 0.48 JIS UWTD Fast wind/rewind C60 : < 120 sec. Frequency response P/B : 125 - 8000 Hz S/N ratio :

≥ 40 dB

COMPACT DISC

Frequency response : 100 Hz - 10 kHz S/N ratio : 60 dB Channel difference 1 kHz : < 3 dB Channel crosstalk 1 kHz : 40 dB Laser wavelength : 780 ± 20 nm Laser light power : < 0.5 mW

SERVICE TOOLS

TORX T10 screwdriver with shaftlength 150mm.........................................4822 395 50423

TORX screwdriver set SBC 163...............................................................4822 295 50145

Audio signal disc SBC 429........

Playability test disc SBC 444...................................................................4822 397 30245

Test disc 5 (disc without errors ) + Test disc 5A (disc with dropout errors, black spots and fingerprints)

SBC 426/426A.....................................................................4822 397 30096

Burn in test disc (65 min. 1kHz signal at -30 dB level without “pause”)

Universal test cassette Fe SBC 420

..............................................................4822 397 30184

.....4822 397 30155

........................................................4822 397 30071

PCS 107 206

DISASSEMBLY DIAGRAM

A. To remove Handle B. To remove Top Panel C. To remove Front Cabinet Assy D. To remove Tape Deck E. To remove Front Panel F. To remove Tuner Board

4-1 4-1

PCS 104 241

SERVICE TESTPROGRAM

4-2 4-2

NEXT button

pressed?

Display shows all

segments and flags

for checking open circuits.

see figure 1

NEXT button

pressed?

Display shows figure 2.

All alternate pins (2, 4, ..)

of the display are activated

for checking shortcircuits.

STOP button

pressed?

REPEAT ALL

fig. 1

fig. 2

To enter Service

Testprogram hold

PLAY & STOP buttons

depressed while switching

CD mode on.

Display shows version number of the µP - software.

Slide servo, Radial servo, Focus servo, Disc motor and Laser are switched off. Mute is switched on via decoder IC.

DISPLAY TEST CD SERVO TEST

SHUFFLE

PROGRAM

SHUFFLEREPEAT

FOCUS search

automatic

adjustment of

TRACK BALANCE

PLAY button

pressed?

Display shows

N N N N

PLAY button

pressed?

Display shows

objective moves up&down disc motor for 160ms "on"

FOCUS found?

Display shows

disc motor turns.

PLAY button

pressed?

Display shows

STOP button pressed in any step returns to begin of Service Testprogram.

To leave Service Testprogram switch

CD mode off. Door switch is ignored Æ CD door can be opened.

SLIDE test DISC MOTOR test

NEXT button

pressed?

Y Y Y

Slide moves

outside as long as

button is hold

depressed.

To check Focus over the whole disc area Slide - and Discmotor can also be activated in FOCUS - test.

PREV. button

pressed?

Slide moves inside

as long as button is hold depressed

or until

inner-switch

is activated.

while autom. track balance adjustment is active as soon as track balance adjustment finished.

(1 - 6) indicates the actual setting.

MODE button

pressed?

Disc motor turns

clockwise

as long as button

is hold depressed.

(accelerate )

CD PLAY TEST

The CD PLAY TEST is intended to be used for continuously playing a disc in order to detect intermittend or not reproducible failures. The error code indicates where the failure can be found.

MODE button

pressed?

CD is in normal

PLAY mode.

In case of failures

error codes acc. table 1

will be indicated

on the display.

POWER

switched off?

Exit Service Testprogram

CD ERROR codes

Error number Error type

E0 Focus Error

Triggered when the focus is lost for more than 250ms during playing the CD.

E2 Slide-in error

Generated when the inner-switch did not close within approx. 4s when the pick up is moved inside. Inner-switch or slide motor problems.

E3 Slide-out error

Generated when the inner-switch did not open within approx. 250ms when the pick up is moved from the inner position outside. Inner-switch or slide motor problems.

E5 Jump error.

Triggered when the servo processor counts too less tracks in a defined time during JUMPS. This can be caused by a disturbed HF-signal (the tracks cannot be recognized exactly), slide motor problems, track servo problems or scratched discs.

E6 Subcode Error

No valid subcode for 300ms during PLAY.

E7 PLL lock error

When the PLL did not lock after 10 retries then this warning message is generated and the servo is stopped and restarted (as if the user would have pressed STOP and then PLAY immediately) to recover.

F0 Focus Search Error

Triggered when the focus could not be found within 3s when starting up the CD.

F2 Fatal Subcode Error

No valid subcode for more than 4s during PLAY.

Error type:

W = Warning Æ

F = Fatal Error

set continues operation, message remains on the display until next error occurs or any key is pressed.

Æ set stops operation, message remains on the display.

(The set can only be operated again via a reset)

Error description

table 1

servtest EVA, 030398

MODE button

pressed?

automatic

adjustment of

FOCUS GAIN

MODE button

pressed?

automatic

adjustment of

TRACK GAIN

MODE button

pressed?

RADIAL test

NEXT button

pressed?

CUE - mode jumps in steps of 16 tracks forward

PLAY button

pressed?

Display shows

PLAY button

pressed?

Display shows

track servo switched on

PLAY button

pressed?

Display shows

Æ Play mode

MUTE is switched off

PREV button

pressed?

REVIEW - mode jumps in steps of

16 tracks backwards

while autom. focus gain adjustment is active as soon as focus gain adjustment finished.

(1 - 6) indicates the actual setting.

while autom. track gain adjustment is active as soon as track gain adjustment finished.

(1 - 6) indicates the actual setting.

Purpose of RADIAL test:

To check if the Audio signal is reproduced. Subcode info is ignored during this test Æ If the CD player functions well in this testmode, but not in the normal Play mode check quality of the eye-pattern signal.

If the margin settings 0 or 7 are displayed the required setting is possibly out of the adjustment range. Æ check disc drive and/or electronic circuitry

PCS 99 154

mp Æ

mp ´

mp Æ

CD STARTUP PROCEDURE

BEGIN

+A(CD)

supplied to

CD part?

Decoder delivers CLOCK -

frequ. 4.23MHz to µP.

µP-RESET line Æ high

µP init. Decoder 7801.

Init. 7801 for ext. DAC Init. 7801 for int. DAC

µP moves slide inside

µP moves slide outside

(0,2s time-out starts)

Disc motor 100ms on

µP initializes Decoder and Servo IC:

-start turntable

-adj. track bal. and gain

-read subcode (TOC)

Level on

pin23

(CD-RESET)

after 100µs?

(4s time-out starts)

inner switch

closed?

Y Y

inner switch open?

Y Y

slide off

Door closed?

Laser on

FOCUS search on

focus found? 3s time-out over?

TOC

found?

display shows max. trackno.

STOP MODE STARTUP FAILED

CD switched on

(mode switch)

HIGHLOW

4s time-out over?

0,2s time-out over?

Display shows

4-3 4-3

Abbreviations and Pin-descriptions of CD ICs

SERVO PROCESSOR M62475FP

Remark: To check focus servo, slide servo, track servo and turntable use service test program

- Battery empty?

- check +A,

- mode switch o.k.? check: - +A(CD), +B(CD), +LASER, +M,

- time constant of reset circuit

- Pin 32 of µP 7800 HIGH ?

- Pin 30 of µP 7800, if 4.23 MHz o.k.

check: - door switch

startup proc.

stopped,

display shows

check: - Laser light on ?

Check pin 38 of 7803 and LASER CONTROL circuit

- Focus Servo

check: - Motor control pin 27 of Decoder 7801 and

Disc Motor driver 7805

- HF Signal by using service testprogram

CDstartup EVA, 080997

Pin Name Direction Description

1-3

A, B, C

4-5

E, F 6 SGT 7 TE - - Inverting input of track error amplifier 8 TEGain - Gain control pin of track error amplifier 9 TG1 - Track Gain 1 - switch: controls the gain of the track servo amplifier

10 TE out - Track Error amplifier output 11 TC/Shock - Track Cross/Shock detector input 12 TS + - Non inverting input of track servo amplifier 13 TG2 not connected Track Gain 2 - switch: controls the gain of the track servo amplifier 14 TS - - Inverting input of side servo amplifier 15 TS out 16 SS + - Non inverting input of slide servo amplifier 17 SS - - Inverting input of slide servo amplifier 18 Slide out 19 DET. FILTER 20 BIAS 21 GND - Ground connection pin (negative supply) 22 MLA/DIS 23 JP1/SG 24 MCK 25 MSD 26 D

out

27 C

LPF

28 I

REF

29 V

30 FS

OUT

31 FS - - Inverting input of focus serco amplifier 32 FEGain - Gain control pin of focus error amplifier 33 FE - - Inverting input of focus error amplifier 34 SGF 35 C

FSR

36 ALPC + - Non inverting input of Automatic Laser Power amplifier 37 ALPC - - Inverting input of Automatic Laser Power Control amplifier 38 ALPC 39 MRC - Connection pin for capacitor of Mirror detector

OUT

40 HF 41 HFI - Inverting input of HF amplifier 42 ABC - Sum output of amplified A, B and C input (central photo diode signal input)

SERVO PROCESSOR M65824FP

Pin Name Direction Description

1 Anal. V 2 ADJCLK not connected Clock output for servo adjustment; f=88.2kHz 3 LOCK not connected Lock monitor / low disc rotation output 4 CKSEL - System clock selection. Low=8.4672MHz, high=16.9344MHz 5 RESET 6 C423 7 C846 not connected 8.4672MHz clock output 8 XI 9 DVSS - Digital system ground

10 XO 11 TEST - Normal / Test selection input. Testmode = high 12 SBCO not connected Subcode serial output 13 SCCK - Shift clock input for subcode data read 14 SYCLK not connected Frame lock status output. Lock = high 15 EFFK not connected EFM frame clock output. Duty = 50% 16 KILLB not connected Digital silence mute output. Digital zero = low 17 EST1 not connected Error monitor output 1 18 EST2 not connected Error monitor output 2 19 HF 20 TLC - Slice level control signal output 21 LPF - PLL loop filter 22 23 DSPS - Digital system power supply 24 SBQS not connected Interrupt signal to read out subcode Q data. Read = low 25 CRCF not connected Subcode Q-channel Cyclic Redundance Check Flag output. CRC o.k. = high level 26 SCAND not connected Subcode sync signal detection. Sync = high 27 PWM 28 DVDD2 - Digital interface power supply 2 29 DVSS2 - Digital system ground 2 30 MCK 31 MSD 32 MLAB 33 EXP1 34 EXP2 35 CGREF 36 AMPREF not connected Op-amp for LPF reference voltage setting 37 LOUT/DO 38 LNEG not connected Charge pump output (left channel) / Ext.DAC mode: Wordclock output 39 ROUT/DSCK 40 RNEG/LRCK 41 IREF - Current reference 42 Anal. V

Dig. V

Diode array Æ Servo processor Diode array Æ Servo processor Servo processor Æ Track error ampl. Input

Servo processor Æ Servo driver

Servo processor Æ Motor driver

Servo processor Æ external electronic

Servo processor Servo processor Servo processor

Servo processor

Servo processor Æ mp

- Reference current input

- Positive supply connection pin (4V - 5.5V) Servo processor Æ Servo driver

Servo processor

Focus error ampl. Input

- Charge capacitor for Focus Search triangle-generator

Servo processor Æ Laser driver

Servo processor Æ Decoder

- Analog system ground

Signal processor

Signal processor Æ mp

X-Tal Æ Signal processor

Signal processor Æ X-Tal

Servo processor Æ Signal processor

- Digital interface power supply

Signal processor Æ Motor driver

Signal processor Signal processor

Signal processor Signal processor Signal processor Signal processor

Signal processor

Signal processor Signal processor

- Analog system power supply

Current input (central photo diode signal input) Current input (satellite photo diode signal input) Signal generator output to track servo, sends 1700Hz for adjustment procedure

Output of track servo amplifier

Output of slide servo amplifier Pin for connection of DETection FILter capacitor of ADJUST LOGIC Reference Voltage output Vcc/2 of internal BIAS-generator

Serial interface Microprocessor Latch control/DIScharge control for adjustment Serial interface Jump control line/Signal Generator input line for adjustment Serial interface Clock input line Serial interface Data input line Serial interface Data output line Pin for connection of Low Pass Filter capacitor of ADJUST LOGIC

Output of focus servo amplifier

Signal generator output to focus servo, sends 1300Hz for adjustment procedure

Output of Automatic Laser Power Control amplifier

Output of HF amplifier

to external ac-coupling capacitor

System reset (low level = active)

4.2336MHz clock output

Crystal oscillator input

Crystal oscillator output

HF signal input

Disc motor driving (Pluse Width Modulation) output

p interface shift Clock input p interface Serial Data I/O line

p interface Latch clock input (internal 22k pull up resistor) Versatile input pin (internal 4.7k pull up resistor) Versatile input pin (internal 4.7k pull up resistor) Charge-pump for LPF reference current input

Audio signal output (left channel) / Ext. DAC mode: Audio serial data output

Audio signal output (right channel) / Ext. DAC mode: Data shift clock output Charge pump output (right channel) / Ext.DAC mode: L/R clock output

PCS 99 155

BLOCK DIAGRAM

5-1 5-1

TELESCOPIC

ANTENNA

TUNER BOARD

FM-Osc.

AM-Osc.

FERRITE

ANTENNA

AM-RF

Stab

ext. DAC

only

+Laser

1350

DBB

SHUFFLE

PROGRAM

CD-reset

Inner Switch

PWM

42 23

22 28

+A(CD)

1820

reset

frontend

1814

1812

watchdog

30 in

DATA INTERFACE

motor control

PLL

VDD analog VDD logic

VDD 1 VDD 2

reset

door

VOLUME

to 1201

RESET

7801

DECODER

M65824

audio

processor

digital

PLL

1 29

3300

+B(CD)

4.23MHz

soft

on/off

Clock

Generator

l/r clk

left data

DAC

right

flags error

control

EFM

demod.

POWER STAGE

+A(on)

TA8227P

on/off

40 37

39 18

7300

6 8

5803

8.46MHz

L/R CLK

DSCK

left, right out

ext. DAC (opt.)

TDA1311A/N2

2 3

data

interface

EVA Blockdiagr., 160398

1809 1808

D/A

HEADPHONE

1302

1301

LEFT

RIGHT

1807

door

switch

Left

4Ω

Right

4Ω

1900

A V

Stab

Osc.

FM-IF 1 FM-IF 2

10,7 MHz 10,7 MHz

AM/FM Indicat.

AFC

1514 10 20

AM-IF 1 AM-IF 2

FM-RF

frontend

Mixer

Frontend

Mixer

STABILIZER

625

Vcc

A V

Stab

DISC

FLEX WIRE

Inner

switch

pick up

unit

CD-drive

CD 97 DA11

CD94V5T1

Stab

Discr.

LF filter

Det.

285 29

9 27

7111321

Det.

IF2

IF1

AM IF

AGC

AFC

AGC/AFC

468kHz468kHz

Stab

DISC

MOTOR

TRACK SERVO

FOCUS SERVO

DAB

(for /01/11 only)

1007

Laser diode

Monitor diode

VOLTAGE

SELECTOR

PHOTO DIODE

ARRAY

1006

MAINS-SOCKET

SLIDE

SERVO

5 4 3

AM/FM

switch

7102

VCO

left

Stereo

right

Decoder

stereo

tuning indicator

7101

RADIO IC

TEA 5711T

Th. 115˚C

BATTERY COMPARTMENT

(R20)

6 x 1.5V

stereo stereomono

left

right

Vcc

152kHz, 50mV

FLEX WIRE

Focus search Service step 2

0.3s

2 3

TAPE TRANSPORT

right

PLAY

permanent

magnet

erase head

MOTOR

5001

(Tuner) (FM)

left

on /off

1101

N S

COMBI BOARD

1201

Tuner L

Tuner R

(Tuner)

(FM)

1810

Disc Disc +

Inner Switch Inner Switch Slide +

Slide -

1811

+Laser

E F

B+D

A+C

Monitor

Laser Track Focus +

1601

1204

1202

1203

Track + Focus -

+A (TAPE)

6250

6251 6252

+Battery

CD Synchro

Bias Oscillator

CD Synchro

Rec

4x 1N4002

to/from

source switch

MOTOR DRIVER

SERVO DRIVER

Rec

6253

1901

CD - PART

PWM

DISC

SLIDE

FOCUS

TRACK

+Laser

7854

REC/PB - AMPLIFIER

16261626

4 5

7625

Rec/Pb

Amplifier

AN7318S

Feedback

SLIDE

FOCUS

TRACK

E - F

ALPC

1626

Rec

7803

SERVO PROCESSOR

M62475

A+B+C+D

Vcc

21 29

+B(CD)

Rec

+B (TAPE)

ALC

+B (TAPE)

1626

Rec

KEY +B (CD) GND

RC5 RC5'

Vcc

SERIAL DATA INTERFACE

FRONT BOARD

MODE

REF

Tuner

PLAY

CD Synchro

DISC MOTOR

PWM

eye-pattern

+A(CD)

SOURCE

SWITCH

1250

Tape

STOP

key in

12 1, 35-40

TB 2us/Div

TB=0,5 us/DIV

Rec

Tape

REPEAT ALL

VDD

VSS

+A(on) +B(Tape) +A(FM) +A(Tuner)

MICRO PROCESSOR

TMP47C422F

+B(CD)

7800

PCS 104 242

+ 15 hidden pages