Philips rc 948 service manual

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PCS 88 570

CD Car Radio 22R0948/oo

Service
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SerVIce

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[filU§@ For repair information of the CD player, see Service
Manual No 4822 725 24095 of CD mechanism CDM9

DIGITAL AUDIO

Contents page 12 V 9",

Technical data ..............................................

Controls - Connexions
lnit mode .....................
Checks and alignment
Power supply organization
CDSP description
CDSP pinning...
Block diagram...
Front schematic diagram part 1..
Front schematic diagram part 2
Front PWB layout
Front partsiist....
Tuner parts schematic diagram
Power supply part 00 schematic diagram
Power supply part 01 schematic diagram
Power supply part 02 schematic diagram
Power supply part 03 schematic diagram
Main PWB layout - top side view ..............
Sound process part 00 schematic diagram ..
Sound process part 01 schematic diagram ..
Microcontroller part 00 schematic diagram ..
Microcontroller part 01 schematic diagram ..
Main PWB layout - bottom side view..
Tape part schematic diagram .............
Power amplifier part schematic diagram ..
Opening the front ..........................................
Mechanical panelist - Technicians remarks.
Exploded view ..............................................
Electrical partslist .................................................................................... 30 - 30a - 31 ~ 32

Publishedby PhilipsCarSystems Printed in the Netherlands ©Copyright reserved Subject to modillcation - 5 4822 725 24400
g I H I L I I S

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TECHNICAL DATA

GENERAL

Power supply

Dimensions

Front

Security code

Blinking LED

Quiescent current (at 12.6V)
Illumination color

RADIO

LW

MW (Europe)

MW ( USA)

SW

FM (x3)

IF-AM (1/2)

lF-FM (1/2)
Sensivity 26dB S/N

Limitation a-SdB

CD

CD mechanism
Frequency response
Crosstalk L-Ft at 1KHz

AMPLIFIER
Output power
Treble control
Bass control

:10 to 16V DC

:180x160x51 mm

: Full etachable

: No

: Yes

: <3mA (with clock and blinking LED)
: Orange/ Green

: 144-288 KHz - steps Manual / Search : 1 KHz

: 531-1629 KHz - steps Manual / Search : 1 l9 KHz
: 530-1710 KHz - steps Manual / Search : 1 / 10 KHz
: 5.85-6.25 MHz - steps Manual / Search : 1 KHz

: 875-108 MHz - steps Manual / Search : 50/ 100 KHz
: 10.7 MHz / 450 KHz

: 72.2 MHz / 10.7 MHz

: 38 pV (LW) (limit)

: 30 av (MW) (limit)

: 25 (N (SW) (limit)

: 4 uV (FM) (limit)

: 5 to 20 [N

: CDM9-3A
: 30 - 16000Hz
: >30 dB

:4x19W/4Q(THD = 10%)
:+10/-10 at 10kHz
:+12/-12 atBOHz

Balance control : 70dB
Fader : 70dB
ESD
IA ESD eguipment available in Service:
Anti-static table mat large 100X650X1.25mm
small 600X650X1.25mm
WARNING Connection box (1 Mohm)

All le and many other semi-conductors are
susceptible to electrostatic discharges (ESD)
Careless handling during repair can reduce its
drastically.

When repairing, make sure that you are
connected with the same potential as the mass
of the set via a wrist wrap with resistance.
Keep components and tools also at this
potential.

Extendible cable (to connect wrist band
to connection box)

Connecting cable (to connect table mat
to connection box)

Earth cable (to connect any product to
mat or box)

Complete kit ESD3 (combining all above
products)

wristband tester

4822 466 10953
4822 466 10958
4822 395 10223
4822 320 11307
4822 320 11305
4822 320 11308
4822 310 10671

4822 344 13999

22 R0948/OO