Pioneer SX-255R Service Manual page 7

@NOTE FOR FUSE REPLACEMENT
CAUT[ON-FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE AND RATINGS ONLY.
TRANS ASSY
(AWZ8 097 : SX-255R/KUXJ, KCXJ
SX-205/KUXJ)
(AWZ8378 : SX-255R/YPWXJ
SX-205/SDXJ)
(=> SCH-4)
FU3 REK1075— SX-255R/KUXd, KCXJ
FU4 125V 1A 9 SX-205/KUXJ, SDXJ ONLY
pt ae |
FU3 SX-255R/YPWXJ ONLY
FU4
AEK1053—
TS0OmA L 250V
A A,
Jt
AKT1085—
(ATS 7114! SX-255R/K UXJ = :
SX-205/KUXu) HQGO@OOOOOOD
(ATS 7115 :SX—255R/KCXJ)
(ATS 7120 : SX-255R/YPWX J)
(ATS7117:SX-205/SDXv)
DYY1 2-—300-2651
OAMOOOOOOOOD
J
AKT1085—
YJGHW6—-40-35/35
O J34 eo
| POWER SW. ASSY
O C) (AWZ8095)
J35
Y JGHW8—40-35/35 (mm SCH-4)
SX-205/KUXJ, SDXJ ONLY
QOAHOOOOO®
J2
AKT 1 023—-
VOL. ASSY
(AWZ8092 :SX-2S55R/KUXJ
KCXJ, YPWXJ)
(AWZ8093 : SX—-205/KUXJ
SDXJ)
015A12-150-2651
(e> SCH-S)
SX-255R, SX-205
SX-255R/YPWXd
SX-205/SDXJU ONLY
NOTE FOR SCHEMATIC DIAGRAMS
1. When ordering service parts, be sure to refer to
"PARTS LIST of EXPLODED VIEWS" or "PCB
PARTS LIST"
. Since these are basic circuits, some parts of them or the
values of some components may be changed for improve-
ment.
_ 3. RESISTORS:
Unit: k:kQ, M:MQ, or Q unless otherwise noted.
Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise
noted.
Tolerance: (F): 1%, (G): 2%, (K): 10%, (M): +20% or 5% un-
less otherwise noted.
4. CAPACITORS:
Unit: p:pF or pF unless otherwise noted.
Ratings: capacitor (uF) / voltage (V) unless otherwise noted.
Rated voltage: 50V except for electolytic capacitors.
5. COILS:
Unit: m:mH or nH unless otherwise noted.
. VOLTAGE AND CURRENT:
(--V]_ : SIGNAL voltage at rated output.
VT or +V:
DC voltage (V) at no input signal unless otherwise noted.
Value in{ ) is DC voltage at rated power.
<= mA or —mA:
DC current at no input signal unless otherwise noted.
7. OTHERS:
© @ or @ : Adjusting point.
o <q : Measurement point.
eThe A\ mark found on some components parts indicates the im-
portance of the safety factor of the parts. Therefore, when re-
placing, be sure to use parts of identical designation.
8. SCH-C) ON THE SCHEMATIC DIAGRAM:
e SCH-O indicates the drawing number of the schematic dia-
gram. (SCH stands for schematic diagram.)
. SWITCHES (Underline indicates switch position):
Voltage Selector (SX-205/SDXJ only)
AC110V/120—-127V/230V/240V
(TYPE 1A)
MOTHER Assy
$401 9k/10k (SX-205/SDXJ only)
FL AND UCOM ASSY
$826 STATION UP
$827 STATION DOWN
$828 CLASS
$829 MPX MODE
$830 FREQUENCY UP
$831 FREQUENCY DOWN
$832 BAND
$833. PHONO
$834 TAPE 2
$835 TAPE 1/VCR
$836 S. BASS
S837 MEMORY
$838 CD
$839 LD/DVD
$840 TUNER
POWER SW. Assy
S876 POWER STANDBY/ON (for SX-255R)
$401 POWER (for SX-205)
SP SW. AND HP. Assy
$701 SPEAKER A ON/OFF
$702. SPEAKER B ON/OFF
SCH-1
OVERALL SCHEMATIC DIAGRAM