Philips 900 Series Service Manual

CIRCUIT DESCRIPTION 2
3 CIRCUIT DESCRIPTION
Preface
This
circuit
description
is
an
add-on
to
the
DCC
Basics
System
description,
Chapter
7
Introduction
©0002.
teeters
5
inthe
Audio:
Training
Kit
1993:
1
GENERAL
493
5x
ool
oe4
balnaact
een
ade
hea
uies
doe
bes
teow
9
In
this
publication
the
third
generation
DCC-chip
set
and
mechanics
are
described.
11
DCC
recorders
third
generation.
.....-..
0600
c
cence
cee
eee
nee
eee
9
As
reference
set
has
been
chosen:
DCC951;
but
the
heart
of
this
set,
the
Digital
1.2
Block
diagram
of
the
DCC
Digital
Unit
Module
(DDU)
...........6+-+05
+
12
compact
cassette
Deck
Unit
Is
an
application
which
will
be
implemented
in
a
lot
of
1.3
Block
diagram
DCC951
ww.
cence
tenet
ents
13
other
Audio
Systems.
1.3.1
Operation
Modes
....
2.02.
cee
enn
en
teen
n
eres
13
This
description
is
Intended
to
be
used
by
service
trainers,
service
techniclans
and
1.3.1.1
Data
playback,
Aux
playback
.........
++.
e
reece
erect
nee
eens
13
others
who
are
interested
in
the
applied
technologies
and
it
explains
in
a
more
1.3.1.2
Data
record,
AUX
reCOrd
6.0
e
ete
eee
14
extended
way,
a
number
of
short
instructions
as
those
are
laid
down
in
the
Service
1.3.1.3
Data
playback,
Aux
record
......
+++
s
seer
eee
rere
eres
eee
eee
nea
nnes
ed
Manuals.
Reference
is
made
to
Service
Manual
drawings
and
in
steps
the
most
;
1.3.1.4
ACC
playback
6.0.0.6...
ccc
cece
cette
erent
tenant
ents
14
jpertant
sotlors
diva
appbed
teciinolagy
are
er
pialved:
2
TAPE
DRIVE
PART
MECHANICAL
...
0...
0.000
c
ccc
e
cece
ence
eee
tenes
17
weston AUN ahd, ol Sd va oe Denar aha: &: 4 sale eae e toed e cectig 9 Acetate epee 17
Atter
the
study
of
this
description
the
service
technician
will
be
able
to
analyze
the
ss
ae
scat
ASI
edn
RA
eget
Ne,
tee
ene,
Te
ah
inn
lane
ca
17
related
to
DCC
occurring
faults,
which
results
in
a
quick
diagnosing.
So,
via
this
22
Command
gearwheel
.....
0.600
c
cece
cence
enter
cent
tebe
n
tances
19
publication,
the
reduction
of
the
repair
time
can
be
realized.
22.1
Moving
headsupport
.....-0
00sec
c
cece
ete
ere
tenet
eee
nett
anes
19
2.2.2
Stop
POSITION
2...
eect
eee
erate
enna
19
To
get
familiar
with
set
OCC951
the
commercial
leaflet
has
been
included
in
the
2.2.3
Play
Forward
position
......
0.00
cece
cece
eee
nee
e
eee
n
enn
n
nas
19
introduction
chapter.
After
that
the
technical
description
starts.
2.2.4
Play
Reverse
position
2.0.0...
000
c
ce
ccc
eee
nee
e
nent
tee
20
2.2.5 Search “A" head position 6.0.0... ccc cece ce ete eee tees 20
2.2.6
Search
"B"
head
position
1.0.0.6
0
ccc
ene
bene
renee
e
ened
20
2.3 Azimuth adjustment «2.2.0.6 2c e cece eee eee eee e ene 21
2.4 Write current adjustment. 2.6.06 6 cece nner e nena 23
3 TAPE DRIVE PART ELECTRICAL
3.1 Read/Write board ......6. eee eeeeee
3.1.1 Block diagrams of the Read/Writ ......6.60 002 ee eee eee
3.1.2 Write IC TDAIBI9T 2... cece cee ee eee Siders so heed Sale ale wise ae Vinal borate
3.1.2.1 decoder part 0.0... cece eet tate eens
3.1.2.2 current amplifier... 0.0.6 ec eee teen e eet ene n ene
3.1.2.3 Voltage reference ..... 6... c eee eee eet e teens
3.1.2.4 outputs .........-606- Seas CHU a oar nice Ota I
3.1.25 clamp circult 1.0.00. c cece erence teeta eneee
3.1.26 standby mode. ...... 02sec ees e cence rene neenee 38
3.1.2.7 Protection ...... ccc cece nee e reece te neneeee ;
be
3.1.2.8
Adjustment
......-
6c
cece
ceca
rece
r
enn
ee
ne
teees
z 3.1.2.9 Block diagram and pin configuration TDA1319T
3.1.3 Read IC TDA1317 2... ccc ccc cece cence net ena ene rererevensrene
3.1.3.1 digital pre-amplifierS .. 0... ccc ce eee tenet teeter enna
3.1.3.2 multiplexer .... 06. eee te eee enter n nea
3.1.3.3 analog pre-amplifiers 6.0... ce cece eee ee eee e ene teens
3.1.3.4 feedback amplifier... 0.0.6.6 ccc eee rece reer e ence ene ee eennee
3.1.3.5 Block dlagram and pin configuration TDAI317 «0.66 cee ene
! 3.1.4 Pin configuration of the Read/Write board connectors
3.1.5 Circuit diagram of the Read/Write board ... 2... -6 6c c eee eee nene
3.2 Digital board 0... cece cece cece eet een ene teenie eee t tee nenanes
3.2.1 Block diagram... 6c nec eee entree nent eenes
. 3.2.2 Operation modes of the Digital Board... 2.2.0... eee e cee cece nee
3.2.3 Digital Board UP... 0. cee ence nee nen tne nse nents eeennes
3.2.4 Pin configurations of Digital Board Connectors ....-.. 0660s cere cee eeee
.
:
3.2.5
DCC
ICs
on
Digital
Board
«01...
ccc
ee
ene
ent
nee
ee
tenaee
3.2.5.1 Digital Equalizer & Tape Formatting and Error coding unit (DAP) IC ......... 38
3.2.5.2 Sub-band filter and PASC encoder/decoder (SFC3) IC SAA2003...........665 47
3.2.5.3 Adaptive Allocation and Scalefactor processor (ADAS3) IC SAA2013 ........ 43
3.2.5.4 Digital Audio Input/Output circult (DAIO) IC TDA1315 ... 6.6.0.6 eee eee 45
3.2.5.5 Digital/Analog Converter ......6..6. 0000 cece cece cnn cent een tae 47
3.2.5.6 Analog/Digital Converter ...... 60-01 cee ete e nner ee nae 49
3.2.6 Digital Board Circult diagram ......0 662 e eter eee nen teens 51
PCS 83 502 PHILIPS SOUND & VISION, BG AUDIO - Service Training
PHILIPS SOUND & VISION, BG AUDIO - Service Training PCS 83 503

Philips 900 Series Specifications

General

Brand	Philips
Model	900 Series
Category	Cassette Player
Language	English