Alpine CDM-7874RB User manual

MUALPINE
_
SERVICE
MANUAL
FM/AM
Compact
Disc
Receiver
DIGITAL AUDIO
CDM-7874RB/CDM-7872RB/
CDM-787
1R/CDM-787
1RIiM/
CDE-78S60R

<Cautions for Safe Repair Work>
The
following
cautions
will
prevent
accidents
in
the
workplace
and
will
ensure
safe
products.
@The
symbols
indicate
caution
is
needed
to
prevent
injuries
and
damage
to
property.
The symbols and their meanings follow.
Ww
:
If
you
ignore
this
symbol
and
handle
the
product
incorrectly
or
unsafely,
arming
serious
injury
or
death
may
result.
Cauti
on
If
you
ignore
this
symbol
and
handle
the
product
incorrectly
or
unsafely,
injury
or
only
material
damage
may
result.
@
The
following
symbols
indicate
two
levels
of
cautions.
coming from the pickup.
loose you sight.
Do
not
look
squarely
into
the
laser
light
Fuse
Caution
VAN
@
Always
use
a
designated
fuse.
You
ma’
Use
of
an
incorrect
fuse
may
result
in
a
fire.
Battery Caution
Use the designated battery.
Confirm the correct polarity and seat of the battery.
An incorrect battery or an improperly connected or
seated battery may result in a fire.
Do not allow wiring to be caught in the
screw/chassis.
If wiring is caught in the screw/chassis, it may cause
a short circuit, resulting in a fire.
Designated Parts Caution
QO Look up the part list and ensure that only designated
High Temperature Caution
Touching the heat sink may cause severe burns.
parts are used to prevent problems or accidents.
Wiring Caution
Ensure that the wiring is correct when rewiring to
prevent problems with ignition/breakdown.
Reverse Power Supply Connections or
AN
VAIS
AN
Reverse power supply connections or misconnections
ignition problems and smoke may result.
Wear Gloves
Wear gloves to prevent electrical shocks or injury
Soldering Caution
Hot solder from solder splash may cause severe
burns.
from
the
end
face
of
the
metal.

CDM-7874RB/CDM-7872RB/CDM-7871R
CDM-7871RM/CDE-7860R
Contents
Packing
Assembly
Parts
List
.....:ssssscsssssesessesessessereseseesesnesacsrensassenansnensevansneessnensensareseseneaesennas
4
Packing
Method
View
...c.sssssssssessseseresscsssesteesseneeeseesseseesscsesnscseessnensvavsnsacsesusueenseneaescsusneneneosicasnensiegs
4
Specifications
.....esscsssessseeseseseseeseseseseeceneeeensstenssssesssssessonseasessereesneesesseesenseneneseensnesnseneenaneerenegnes
5,6
Adjustment
Procedures
—....s.scsseesessseseseeeeecsneeeeeesessassesensesasenseessensscsasasesesnsenassnenessnesenssansorsnsaenons
7,8
Extension
Gable
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9
Block
Diagram
..ceeesseesesssssssesssesesesseeseseesesencateceesesesenesasacasaescanecensasssssecesenenessscesasenesnenansereneaentaeny
10
Parts
Layout
on
P.W.Boards
and
Wiring
Diagram
0...
esssssesesssessetesesreseesereessseseenenesecenennens
11~20
Schematic
Diagram
....cecssssssssesccesssererssseersnencsesessenseeeeneeenenseaes
sda
Vesbdeesalecses
adv
uds
cweGunedeateut
dees
21~36
Terminal
Voltage
Of
IC/TR
........ssssesssssessesserssesssenserseesecsesnsereesscnenerassesenseaceeeeotsesesanenenansaensnegees
27~32
Description
of
IC
Termimal
oo...
:sesssceseeeseneeeeerseneseneseesseesesessesessennesersnsnenenassseanseneeeesenseseneees
33~35
Electrical
Parts
List.
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36~43
Cabinet
Assembly
Parts
List
..........cscssscsesesssrerserssesssesssssssnsenessssssenerssneeasecscsasensscasvassueneessen
44
Exploded
View
(Cabinet)
....c.sssssssscssssssseneseerensesneetseesserensesenesesensnserssereecssesseessnecssesesasseseaeas
45,
46
Exploded
View
(CD
Deck
Mechanism)
(DP23S2A0)
—
....s.ssssssessseereseseeseseseeseenesteneentenententanes
47,
48
CD
Deck
Mechanism
Assembly
Parts
List
..........ccsssccssssssereessessssseseseessnsneneesessenereseesenssneoneenan
49
NOTE
:
Due
to
continuing
product
improvement,
specifications
and
designs
are
subject
to
change
without
notice.

CDM-7874RB/CDM-7872RB/CDM-7871R
CDM-7871RM/CDE-7860R
Packing
Assembly
Parts
List
Symbol
Part
No.
Description
Symbol
Part
No.
Description
No.
No.
a
03.
:
$72235F
13
SCR,MCH
M5X8
FLAT
ASSY,WIRE
PWR
7874R
01T15394Y02
ASSY,WIRE
PWR
7874R
36A11113W01
ASSY,WIRE
PWR
7871R
03A11112W01
ASSY,WIRE
PWR
7871R
15D00529K02
ASSY,WIRE
PWR
7871R
ANT,JASO-ISO
CAP, RUBBER(A)
BOLT,HEX.MS(A)
CASE, INNER
15D01798K01
CARRYING,CASE O/M AOEU AODN
NOTE
:
©:
For
CDM-7874RB
Model
Only,
@
:
For
CDM-7872RB
Model
Only,
A
:
For
CDM-7871R
Model
Only,
4:
For
CDM-7871RM
Mode!
Only,
(-]
:
For
CDE-7860R
Model
Only,
Others
:
Common.
Packing Method View

CDM-7874RB/CDM-7872RB/CDM-7871R
merare
CDM-7872RM/CDE-7860R
Specifications
<FM
RADIO>
Intermediate
Frequency
—.....eessesssssssssssnesnesssesreseeatsssessseassnensenssscnesnenesecasenssassaccasacessectennenssaesnanenacessngnags
10.740.1MHz
Frequency
RANGE
—
...s-ssssesseecsssessessneessnneersnesssssancanasessntesnaseranerssnesssscaveceansnnanescgassecenscgnaaeansennseennsssasst2ess
87.5~108MHz
Usable
Sensitivity
(Mono,
30dB
S/N,
at
98.1
MHZ)
esecesscssceecesececcssseeeesesesnsseseseneneseseseseneratsesesenscsnsvaraaesnanegeneas
20.2dBf
-3dB
Limiting
Sensitivity
(at
98.1MHZ)
...--..-.-essessecsesssseenesseesteenesnnsntsnnernnesasesneecectansnssnnacencaseanannennnannagaanenssgnes
20.2dBf
Residual
Noise
(Ref.
400Hz
(WID),
at
98.1MHZ)
........--sessessesssesseseecesesssssnessnesntentenesssenscnsesnaennsennacanenannnagscs
25+10dB
S/N
Ratio
(at
98.1MHZ)
—
--ssssesssecssssssssssesensssecesnenseenneesssnssnsctsnnececsansacnsnssenseanassssaqnnnssqennasenensnsesgssreeeessse
Stereo
:
50dB
Mono
:
55dB
Image
Rejection
(at
106.1MHZ)
—.-ssessscssseserssessssseesssenssnnstsrnnsecansensnnesennssesssvececctssnnenssensnnscranazennaneeasassecsssenenss
seats
40dB
IF
Rejection
(at
90.1MHZ)
.sssssssssssessssseessesesssesssnssesnseenssssessnnseccnnsecnaneceassenssuscrccenisensnsscnanagnaratanasagnassenegnssesess220e3)
60dB
Distortion
(Input
GOABp,
at
9B.AMHZ)
.......-sss-sseeseessesssessssneenssneeenessneensensenesnssessnccesstansenecescenscnnscennnnnecqasenenseasssessess
1%
Frequency
Response
(Ref.
400Hz,
at
98.1
MHZ)
.neeeecceceseessesccessscersensceseenessesssseesecrsnseenenersensecneereneneanss
100Hz
:
0+3dB
10kHz
:
-12+3dB
Stereo
Separation
(1kHZ,
at
9B.1MHZ)
.....---essescssesssssessnesseessseneenneenersesensennennnessssesstssseanenseassasenscesstansenaananenses
see
20dB
PS
Sensitivity
(at
98.1MHZ)
-..sscsssssssssssssessssensessseesensesstsssesessssanennessecsnscnscsnneranscneranecasanssassascansnansesanasceasssesstcs
36.2dBf
<MW
RADIO>
Intermediate
Frequency
—
....-sssssssessesssecsssesseeesesnserssteecnnsensossnenneneenenesnsnssnennnrensaeaneesssnnareseeatenseseeseenstsatae
1st. : 10.7MHz
2nd. :450kHz
Frequency
RANG
—......esssscsesesssscsseseesneessssssnesssersssenscensssenecanscanecaascsassssccnssssssannnsecnnceanccasnnnenanaranannsssesitey
531~1,602kHz
Usable
Sensitivity
(2OdB
S/N,
at
QOQKHZ)
-.....-sessessessssssssesseeseeeeneestentenenssnenesanensecasenenscaanennenarasenncnnneassnenges
st
34dB
S/N
Ratio
(at
Q9QKHZ)
-....--ssssssssssssssnessenseeseessreesessnescusssonssanecasansnensnecnscnnsstnnsersnessarecsrcoassnnaeasannnensasessseneneeetaeeest!
44dB
Image
Rejection
(at
GOSKHZ)
—....--sssesscssssecsseessesssnesesseessansenncenneenanecnsscsanssssnerscassensnsennnnenscenssnnaennssseegssseeesst
ee
s2408
A0dB
IF
Rejection
(at
GOSKHZ)
—.....ssssecssssscsstsseseecssecstssnessneensessenecnnecareranecananssennnesnussssseconscenscnnananaensensneenengnseg
nn
scarce
2008
50dB
Distortion
(at
Q9QKHZ)
—
........-sescssssssnssseesecesseesseenesssnensssnesenscenscsnacsnscenecnsescasscenecsencnssscenannesanscenscenaennsenesseeenssgeeeese
1.5%
Frequency
Response
(Ref.
400HZ,
at
999KHZ)
—
-....-.--sssecssessssessessssestennssesnsesenenrnatennannasensentenassansnenssets
100Hz
:-3=-4dB
<LW RADIO>
Intermediate
FreqUeNCy
—.......ssssscssssesseseessrensesseerentensnsnrenenensasaesnsacasensssaneascosactansenneansanacacnenasaenenneaansets
4kHz : -12+4, -8dB
1st. : 10. 7MHz
2nd. :45O0kHz
Frequency
Range
—.......ssssssesssneessssssssnecsessnssssessnsesnesensessnsecnsensesaseanecenecenscecasenanesassnanacanagnscennananerasscesstes
153-28
1kHz
Usable
Sensitivity
(20dB
S/N,
at
21GKHZ)
.....-....-ssssessesseeseenesntenssetsaseneentenennessnestesssnsennerscnecnsenecnasanannasnnnenseanes
te
38dB
S/N
Patio
(at
216KHZ)
oo...
.ssesssessssecssseseneesenesnssusensesneenennnessuesesesnennsensenasensssasessnssuneenecnncnsenacesnanaconsceaneeaseneana
gates
A5dB
Image
Rejection
(at
27O0KHZ)
—....-sssssessscssesssssessesssnesensesceanecanaccrasenanecsnrsssssssssuncceasnenecensennsecenasennsatensseneantssgese2
20
A0dB
IF
Rejection
(at
162KHZ)
....ssssssscssssssecsnesenssssseessneennscareanensnsesansennnscnareceascssusessnnecenseceneccesnanasegnneesenasenenasnsegeet
et
50adB
Distortion
(at
21GKHZ)
......sessesssessessssssseseneesnesesseesteneenensnsansessenscusensescenceneanesaneanccasssscanensansnscrnaraanensansenensassnseeee
ta
1.5%
Frequency
Response
(Ref.
400HZ,
at
216KHZ)
...--cssssessecseeesssseessssesstessessntesnsennennennncensceeanenaennseenets
100Hz
:-3=+4dB
A4kHz : -12:4, -8dB

CDM-7874RB/CDM-7872RB/CDM-7871R
CDM-7872RM/CDE-7860R
<CD SECTION>
SYStOM
—
oeeeesesececsesssstsscssscsesenseseeneccersneacsnacsneasacessennesanesusinseacesssesuessenseanenessnaesnenssceaee®
Optical
(Compact
Disc
System)
Quantizing
Bit
NUMbEr
oo...
eee
eeeceeeeeeceeeenteceeeeetenesesaesneneeteesensanarecseeseensasseeeterenenenens
deidebeesiteued
16bit
Linear
system
Channels
>
cceesesccezedeiies
coscescteceecdacnes
aceasta
sevpecttle
Setaate
doseeieeenes
a
daehe
tna
toda
heb
vcusaiy
SeadUseotne
aes
vtvudeusenaseccvacuesspeeseens
2
Channels
Channel
Balance
(1KHZ,
TCD-782)
...ssscsecssssesesesssscecensncecesessenencenaeseeesneneneeserscesssisneaenensceacecsnsnenavevensnsnsesacuaneeas
0+3dB
Distortion
(1KHZ,
TVD-782)
...s.sesssecscsesssssesceesseseeecsesnsensensrassnseneneesssesnearereeacsnssssseesesssssensoasassasensecsanennsanenncananeeas
0.1%
17Hz : 023dB
127Hz : 022dB
10.007kHz : 0+2dB
19.997kHz : 0+4dB
Frequency Response (Ref. 1kHz, TCD-782)
SIN
Ratio
(TCD-782)
o...e.esessscsseesssesesssssnenenenesesenenenesnecsseeseneneasacenenseenesesenssterssnsseasecserssstasacarasesusaseceecaeseseensanaenens
95dB
Separation
(1KHZ,
TCD-782)
....sssecsessssesesseeseseeneseeneenensesessessssnsesencsneatsansassssecsnseuanesssseenesneascaseanenscusenennenreerenenieas
55dB
De-Emphasis
(Ref.
1KHz,
TCD-782)
—
....--sssssssesessssseessesneesseneessesseneessonseneeneeneensensnasnnsensnneonsanecanennecaseys
4kHz
:
-2043dB
16kHz : -20+3dB
<Pickup>
Wave
Length
—
...cecseesssseeeessseseneseseessnssesseenseeseneseconasscacanensusnenssssssnssessaaesussesauacscseseneatsseesesegeavasssaranensaeneneneaeee
ses
795nm
PASOr
POWER.
clissleiilesevewcavhseccessdsSocceccosthece’
sled
Jesehdc
aacuectvcakeceenslsttvsusocesc'sencevnisevsccadetesscecesrosdosescwaseossebiteeesaa’
CLASS
I
<GENERAL>
Power
SUPDIY
—
...s.csesesesseseeseceeesessssssnsenercessenenesscnesesteessssseceseaeoestseesassssececeeensenseanerseatasssssssuevensnsaseresseaneneseneats
DC14.4V
Power
Output
(Ref.
FM
Mode/SP-OUT,
T.H.D.
10%)
/IMpedance
—
.......
ee
eesecessesesseserensenessensenereeaseees
16W/ch/40hm
Pre Output (TCD-782 (0dB, 1kHz), T.H.D. 1%,
SUB-W
OFF
Mode
:
Rear
Pre-Out
Mode)
/Impedance
oc
ccccesseeesreeseseeteencees
2V+2.5dBV/ch/10kohm
SUB-W Output (TCD-782 (0dB, 1kHz), T.H.D. 1%,
SUB-W
STEP+15)
/Impedance
—
.......sssesecesseesesseeseneeeseeeeessnseneneeterers
4V+2,.5dBV/ch/10kohm
(O)
Dimensions
(WXHXD)
ou...
.ssssesesesseseneensesesseneseeneceeeneneeeesseecsneraterasenenenenesesseenereeerenssens
Chassis
:
178X50X
158mm
Nose : 188X58X24.4mm (QO)
Nose : 188X58X20.6mm (@A_4())
Weight
n.eseccssecsessssessesessenecsensesseseeeeseanensnessnssssennessacsesseensesersucsnsosseaneseassasserssncassanenscgsaesssaconeauenennenenneeneniseseaesess
1.5kg
NOTES
:
Due
to
Continuing
product
improvement,
specifications
and
designs
are
subject
to
change
without
noice.
©
:
For
CDM-7874RB
Mode!
Only,
@
:
For
CDM-7872RB
Model
Only,
A
:
For
CDM-7871R
Model
Only,
4
:
For
CDM-7871RM
Model
Only,
(J
:
For
CDE-7860R
Model
Only,
Others
:
Common.

CDM-7874RB/CDN-7872RB/CDN-7871R
CDM-7871RM/CDE-7860R
Adjustment
Procedures
1. FM/AM SECTION
(1) Dummy Antenna Circuit
+ 10ohm = 450hm |
Input 60ohm Output
eee erin ened
For 50 ohm FM Signal Generator Figure 1
| 300hm 15pFo
Input 65pF ‘Output
att ieacieue eae:
For 50 ohm AM Signal Generator Figure 2
(2) Connections
Antenna Receptacle AC VTVM
FM Dummy
Antenna
xX Figure 3
GND short for 0.5 sec. ~
Antenna Receptacle AC VTVM
AM Dummy
Antenna
AM
Signal
Generator
Unit
Under
Test
‘ Figure 4
GND short for 0.5 sec.
(3) Control Settings
Power
SWItCH
.....eseseesesseeceeseeeeecseeeeessneeeenee
ON
Band
Switch
©...
eee
FM/AM
(MW/LW)
Fader
Control
........ccseeeeeeeseeeeeees
Center
Position
LOUD/SUB-W
oiv.iccccceeessesseerecneeeecesnereene
OFF
Balance
Control
ou...
eseeseeeceenes
Center
Position
OURGIS)
«202
oicei
cen
died
atadtesdeasdevsezes
teteeteveeeets
OFF

CDM-7874RB/CDM-7872RB/CDN-7871R
CDM-7871RM/CDE-7860R
(4) Adjustment Procedures
Test Point /
Step Description Connection | Signal Generator | Dial Control} P.W.Board Adjustment
Coordinates.
Auto Adjustment :
FM
Seek
Stop
After
setting
up
of
Signal
Genarator,
1
|
Auto
Figure
3
67.5MHz,
2606y
87.5MHz
short
GND
and
TP608
(Pull-Down)
, (Mod. OFF)
Adjustment
for
1
seconds.
(SPEC) 1.520.1V
Auto Adjustment :
MM
Seek
Stop
After
setting
up
of
Signal
Genarator,
2
|
Auto
Figure
4
aoc
short
GND
and
TP608
(Pull-Down)
Adjustment
:
for
1
seconds.
(SPEC) 1.0+0.1V
Auto Adjustment :
LM
Seek
Stop
After
setting
up
of
Signal
Genarator,
1-C
3
|
Auto
Figure
4
LORE
216kKHz
ee
short
GND
and
TP608
(Pull-Down)
Adjustment : for 1 seconds.
(4-B) (SPEC) 1.0+0.1V

CDM-7874RB/CDM-7872RB/CDM-7871R
CDM-7871RM/CDE-7860R
Extension Cable
@
When
repairing
or
measuring
the
voltage
of
this
unit,
connect
with
the
Extension
Cable
as
shown
in
below.
CD Deck Mechanism
PS Extension Cable
(01E29154S01)

CDN-7874RB/CDM-7872RB/CDM-7871R/
CDN-7871RM/CDE-7860R
Block Diagram
Agdsiq ‘Besy)
407 80)puy
t ' 1
H
sosueg
(ANd
E/$)
G07
I
foqueg
aeeid
10v007
|
veo
‘
t
4oauq
4
!
Aey/G01
H
' t t
1
108a0
||
=
if,
ian
f————!
ae
ao
te9yro
(AL)
@+ OMNES
—_————_————
deoy
CD Mechanism
DP23S2A0
Ol 4emog
4OJOOUUSH
JOMOg
(ZZ200NPEN)
oem
yun
aeun
Lozr
LJ
M-{NS/BOYOTV®
+
48040
£
M-8ns
th
°
$013
_____
OA
XA"
YN
=
dSVO
1 ! '
' t t t t '
!
t ' ' t t t ' t ' 1 ' 1
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t '
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ANOUS
1
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{3
301380
'
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t 1 1
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' 1 1 I ' t
' ' ' 1 1 ‘ 1 1 1 I
t
H
NSN
MW
i
i}
t t ' ' - 1 i}
t
1
(Loove1s)
[
™
|
yaqo030
WOU-de
3
sau
Det
f=
ser
Ret
: For CDM-7872RB Model Only, A : For CDM-7871R Model dsily,
: For CDE-7860R Model Only,
: For CDM-7874RB Mode! Only, @
:O
NOTE
> Common. Others
A . For CDM-7871RM Model Only, 0
LAGS