Pioneer KEX-900 Service Manual page 53

8. SCHEMATIC CIRCUIT DIAGRAM (KEX-900SDK/WG)
DISPLAY UNIT
FL TUBE : CAWION
Ind «SOK SK
Ora)
TN
&)
Dex
Q)
NOTE:
—c=o-— Indicates a chipresistor.
——-#— _ Indicates a chip capacitor.
a
=~w— Indicates a printed resistor.
Consists of
Dolby NR. P.C. Board
G.E. P.C. Board
C. Switch P.C. Board
Connection is viewed from
the direction of the arrow.
71 CH @ SEEK = =
(Tt MS BS SCAN (=) 1S Ep SS St =r
GEG/0pSL.SH bat tot tet fet ii I! 11
60
yt p e p aaal
: salad
= HEAD
401: HEAD UNIT
CXAI214
El
1K 3.5K 10K 25 250 500
P2
BSSEERRLEERE
EJ Pe
a
icgo1 PD40S1
$901~911 ; CSG-255
0901~903 : BG4524K
0904~907 ; BGS724K-P
MOTOR
(HEAD)
CXM-452
CXM-351
MOTOR
(CAPSTAN)
CXM-161
SWITCH P.C.BOARD
SENSE
P.C.BOARD (B)
SENSE
P.C.BOARD (A)
P.C.BOARD UNIT (1/2)
CONTROL UNIT DOLBY NR P.C.BOARD
VR251, 252 + CCP-315
PRE_AMP UNIT (CWW1033;) Dolby NR 1C601 : TA7555es
253
REOS REIG
307 " 1208 ces
Rees ceor, Reo? V1 Resa $o0710)
0 = 4.7/38 22k rr cabs, + } RS15 (] coer
5
= 3 | 750 3
S80, OD
c
! Bes Ea @s
————_——— ono
(1) DATA
1 R642 601 REI2 Li] 40) cx
REOG ©630 R636 =
R-CH ie + a> (5)
<= aie — C604 (| "2508 AD)
a as
+ 3 R618
U Us) TUNER-R > |
e Y~ | 0251: 181555 or
[3° © a ust040 OC, sie ® ®)
Oo Grane) eee Gnas CS
Doge S_] 9
Q722 : DTA143ES or UN4122
0720 : °
5 gees 0723 ; DTCI14TS or UN4215 Ble = OTAI43ES or | 28D1055F
DATA | ILLUMI +8 4 ILLUM! +8 UN4122 DTS:
[| —>— < Stk >—{4) | US1040M, 18$176
ei ce 1-2) —<ACC +B > or 1SS133.
Pare 28 tra : ROGR2JSB2 or HZS6R2U82 9720 8.5V
C2 is.4v
R746 ] (|e?
12k Wk
R778
: oe 22k [TT cre
Kan) 100/16 F
1c737 Tore "ev (} []Bzn°
hoor16
|| DC-DC Converter 0722 : ERAIS-O2VH —H eT +8 PtH [| riiaa [|
———< AUX-L ><
=a
S or UN4215 site
a el Lore: wzsccenzaLcs or mrzioua | ||
ry 4 AUX-R ——> 796 : HZ9L.C2, HZ9LC3 or MTZIOUA 4
Q716 | C715
cet Ke} Q715, 716: Laois [|
<OOLBY NR ON/OFF cI
Nos 2SC2458 or 2SC1740S ig DOLBY NR B/C
V LOAD 2)
auc sk Q712, 713:
[ {|
FL oT (B) DTCH4TS or UN4215
< FL G3) —#-< 7046S — 70,
a __| | [_| ee
st Ko)
ST
[| eat
ee
i
aa 2) pied sk L
4 SCK > i DyO8. 709:
———{ DATA } ep US1040M, 1SS176
a Ks)
or 188133
PESET Ks)
Ves
apw ey io
BEEP Key CT BEEP =>
voo (2)
ocean 139) R737, co
—< LeEDY > Ko ORIVER_ UNIT _(CWW1032} oan
Lepe K2) R738, @ Q726 e~ Ox (0720
—{ LED3 (14) (4
a 0) 470 (2w) (|
P x3
SEC Ko} Deck Driver
MRO Koy
wre iS Gy) 9701, 731:
(3) 2SC2458 or} 28C1740S 27
8 =a =
z
(6)
[2s |
< M1> {Go} + @) (9) fee |
—{ MC > Kay (7) (5) 23
we Pt EGP en een Eo TT) os Stems ee
(6) | | =. [2
[> DOLBY B/C
[cows qT tf rao
—a
ona
®) Nes vos Fe
0.047x2 19 AUX LEVEL MH O, (8) - pot 17 R795
ae
ome .
X701:
K4
Te nee
MG Ks) css-042 18 R797,
A 14 R798
% 3
u 12
a u
2) -——————« 1nu 10
a {a) 9 R721
R-INT
7_R72:
P.C.BOARD UNIT (2/2)
3
X)
Yor So
XN
aX)
©@O®
Poe o8) -——
j_~_] etme niga |
ile
€)
€)
> bal
sw4
C748
220
"16
AUX +B >———_—
RLLUMI +8
cE2
SEC
0702 ;
HZS6R2UB2
0702
ROGR2USB2 or
CWW-247
Q703, 704:
OTCIN4TS of UN4215
CEQ)
SEC
R7Z
22