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Portable compact disc player
TABLE OF CONTENTS
Technical specification ......................................................1-1
Feature overview ...............................................................1-1
Connections and controls ..................................................1-2
Accessories .......................................................................1-3
Safety & Warnings.............................................................1-4
Repair positions ............................................................2-1
Dismantling CD-door .....................................................2-1
CD-drive cleaning & lubrication .....................................2-2
CD-drive lens cleaning ..................................................2-2
Handling chip components............................................2-3
Service tools..................................................................2-3
Pin description of ICs ................................................3-1...3-3
Start-up procedure.............................................................3-4
Blockdiagram .....................................................................3-5
©
Copyright 1999 Philips Consumer Electronics B.V. Eindhoven, The Netherlands
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.
Published by PW 9951 Service Audio
CS 46 638
Printed in The Netherlands
Subject to modification
Circuit diagrams
Part1 (supply, control and servo part) ...........................4-1
Part2 (signal processing and audio part) ......................4-2
Printed circuit board
Componentside view .....................................................4-3
Copperside view............................................................4-4
Exploded view ...................................................................5-1
Mechanical partslist ...........................................................5-1
Electrical partslist ......................................................6-1...6-2
AZ7900
AZ7901
all versions
PRODUCT FAMILY DORIS1 - PB1
CLASS 1
LASER PRODUCT
© 3103 785 25000
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Summary of Contents for Philips AZ7900
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Page 1: Table Of Contents
LASER PRODUCT © Copyright 1999 Philips Consumer Electronics B.V. Eindhoven, The Netherlands 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. -
Page 2: Technical Specification
TECHNICAL SPECIFICATION General Headphone out (measured with 16Ω load, DBB off) Dimensions (WxHxD) : 128x28x139mm Output power (THD=10%) Weight without batteries : 220g /17 version only : 2x6mW (+1/-3dB) all other versions : 2x3mW (+1/-3dB) Frequency response (1mW) : 100Hz-20kHz within 6dB : ≥80dB (81dB typ.) Power supply modes S/N ratio (unwght) -
Page 3: Connections And Controls
CONNECTIONS AND CONTROLS 4 , 5 • • H L IN U T / VOL . 1 9 ......stops CD play, clears a program or switches the 9 RESUME ..stores the last position of a CD track played player off HOLD ....locks all buttons OFF ....switches RESUME and HOLD off 2 DBB ....DIGITAL DYNAMIC BASS BOOST switches the... -
Page 4: Accessories
ACCESSORIES “ – ” i l p → e i l a l i CS 46 641... -
Page 5: Safety & Warnings
SAFETY & WARNINGS © ñ WARNING WAARSCHUWING All ICs and many other semiconductors are susceptible to Alle IC´s en vele andere halfgeleiders zijn gevoelig voor electrostatic discharges (ESD). Careless handling during electrostatische ontladingen (ESD). repair can reduce life drastically. Onzorgvuldig behandelen tijdens reparatie kan de levensduur When repairing, make sure that you are connected with the drastisch doen vermindern. -
Page 6: Service Hints
SERVICE HINTS REPAIR POSITION COPPERSIDE REPAIR POSITION COMPONENTSIDE To get access to the copperside of the To get access to the componentside of the printed board assembly proceed as follows: printed board assembly proceed as follows: 1. Remove the bottom screws (6x) 1. - Page 7 VAM2103 – DRIVE CLEANING & LUBRICATION VAM2103 – LENS CLEANING Lubrication of the CD-drive is only necessary in case Before touching the lens it is advised to clean the of symptom “skipping tracks”. surface of the lens by blowing clean air over it in The reason can be dirt which sticks to the grease or order to avoid that little particles make scratches on the grease is getting aged.
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Page 8: Handling Chip Components
HANDLING CHIP COMPONENTS SERVICE TOOLS Audio signal disc SBC429 4822 397 30184 Playability test disc SBC444 4822 397 30245 Test disc 5 (disc without errors) + Test disc 5A (disc with dropout errors, black spots and fingerprints) SBC426/SBC426A 4822 397 30096 ESD PROTECTION EQUIPMENT Anti-static table mat large 1200x650x1.25mm 4822 466 10953... - Page 9 PIN DESCRIPTION OF INTEGRATED CIRCUITS TDA1300T – HF-PREAMPLIFIER AND LASER SUPPLY CIRCUIT (part of CD-drive VAM2103) Name Direction Description ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– HF-preamp → CD10 output of current amplifier 4 HF-preamp → CD10 output of current amplifier 6 HF-preamp → CD10 output of current amplifier 3 HF-preamp →...
- Page 10 SAA7324 – DECODER, DIGITAL SERVO IC AND D/A-CONVERTER CD10 (low voltage version) Name Direction Description ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– → CD10 HFREF comparator common mode input → CD10 HFIN comparator signal input CD10 → ISLICE current feedback from data slicer VSSA1 analog ground 1 VDDA1 analog supply voltage 1 CD10 →...
- Page 11 TA2120FN – Stereo Headphone Amplifier Name Direction Description ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– → headphone-amp DBB NF NF of DBB amplifier headphone-amp → ADD OUT output of ADD amplifier → headphone-amp RF IN terminal for ripple filter circuit → headphone-amp center amplifier on/off switch (open = on) →...
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Page 12: Start-Up Procedure
START-UP PROCEDURE – FLOW CHART Start-up procedure for ext.DC supply, POWER OFF no accu inserted, hold-switch in off pos., (stand-by) resume-mode off, CD-door closed. focus search error handler focus PLAY found within pressed ? ~2s ? toggle play mode “normal” ↔ “CD-RW” DC/DC converter release MUTE is switched on... -
Page 13: Blockdiagram
BLOCKDIAGRAM P TMP47C422F LCD DRIVER RESET CLOCK GEN. TIMER/ & TIMING COUNTER 8.4MHz SILD MEMBRANE I/O PORTS KEYBOARD DISC TURNTABLE MOTOR VDDL TRACK TO HEADPHONE AMP. SERVO 8.4MHz PORES FOCUS LDON H=Laser on (FROM µP) (TO SERVO DRIVER) SERVO Vddl LDon LDON MOTO1... - Page 14 1250 A7 1951 E14 2256 B12 2268 C14 2406 F2 2957 E13 2965 H10 2974 G11 3254 A9 3262 B10 3268 C13 3290 C7 3406 B2 3412 F1 3953 E10 3966 H10 5251 A13 6256 A7 7250-C B11 7254 A9 7956-A G2 F255 A14 F404 A3...
- Page 15 1350 G15 2353 H13 2358 I13 2366 F11 2374 G8 2379 I8 2810 B9 2815 F4 2820 E4 2825 F5 2830 F5 3300 F11 3354 I10 3359 G10 3373 I6 3378 G8 3796 A3 3804 B6 3811 A9 3816 A5 3821 C9 3826 E3 3834 C3...
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Page 16: Componentside View
1250 D7 COMPONENTSIDE VIEW 1251 C7 1350 G1 1418 F1 1430 C2 1800 E2 1950 B7 1951 F4 2350 G3 2351 G2 2353 G3 2356 H4 2358 G3 2374 F3 2375 F3 2812 E2 2826 E3 2843 F2 2960 G2 3300 H2 5250 C6 6256 E7... -
Page 17: Copperside View
1403 B4 2825 C6 3356 G5 3820 C2 COPPERSIDE VIEW 2251 D3 2827 C6 3357 F3 3821 C2 2252 A2 2828 C5 3358 G4 3822 E6 2253 D2 2829 D6 3359 G4 3823 D7 3360 H5 3824 E6 2254 A2 2830 C6 2255 B2 2837 C2... -
Page 18: Exploded View
EXPLODED VIEW MECHANICAL PARTSLIST 3103 304 68080 DOOR-BATTERY-2 3103 304 68060 LEVER-OPEN-2 3103 304 68110 SLIDER-RESUME-2 3103 307 97940 SLIDER-OPEN-2-LAC 3103 304 68070 HOLDER-OPEN-2 3103 301 06500 SPRING-SLIDER-OPEN-2 3103 301 06520 SPRING-OPEN-LONG-L-2C45 3103 301 06510 SPRING-OPEN-LONG-R-2C45 3103 304 68090 BRAKE-2 3103 301 45180 SPRING-BATTERY-SHORT-2 9305 022 13208... -
Page 19: Electrical Partslist
ELECTRICAL PARTSLIST CAPACITORS ––––––––––––––––––––––––––––––––––––––––––––––––––––– 2819 © 4822 126 13883 220pF 2820 © 4822 126 13883 220pF MISCELLANEOUS 2821 © 4822 126 13883 220pF ––––––––––––––––––––––––––––––––––––––––––––––––––––– 2822 © 5322 126 11583 10nF 0211 9360 282 30112 LCD PANEL LPH6406-1 2823 © 4822 122 33777 47pF 1250 2422 026 05086... - Page 20 RESISTORS RESISTORS ––––––––––––––––––––––––––––––––––––––––––––––––––––– ––––––––––––––––––––––––––––––––––––––––––––––––––––– 3315 © 4822 117 12971 15Ω 0,06W not for /17 3825 © 4822 051 30103 10kΩ 0,06W 3351 © 4822 117 13632 100kΩ 0,06W 3826 © 4822 051 30103 10kΩ 0,06W 3352 © 4822 051 30333 33kΩ...