Pioneer SC-27 Service Manual page 153

5
Supply for
POWER AMP GATE DRIVER
!
CN7241
-B+10V
1
2
-B
KM200NA2
!
P7241
NM
JV7241
+12.5V !
IC7271
NJM78M05FA
3 IN 1
OUT
GND
2
!
3
2
COM
1
IN OUT
IC7272
NJM79M05FA
-12.7V
D7211
D7205
1SR154-400
1SS352
!
Q7211
2SD1763A(DE)
D7213
HZU7R5(B1)
D7214
HZU7R5(B1)
Q7212
2SB1186A(DE)
D7212
1SR154-400
!
+20V
IC7251
NJM78M12FA
OUT
IN
3
1
COM
2
GND_DF
!
3
2 1
COM
IN OUT
IC7252
-20V
NJM79M12FA
5
6
The mark found on some component parts should be replaced with
same parts (safety regulation authorized) of identical designation.
Q
1/5
CN4901
Power Supply for
ICEPOWER AMP MODURATOR
V+5_MD
GND_MD
V-5_MD
FANCTLH
FANCTLL
D7215
1SR154-400
Q7222
LTA143EUB
D7216
1SR154-400
Q7221
LTC124EUB
!
V+12_DF
R7255
0
R7253
NM
R7256
0
R7254
NM
V-12_DF
6
7
• NOTE FOR FUSE REPLACEMENT
CAUTION - FOR CONTINUED PROTECTION AGAINST
RISK OF FIRE, REPLACE WITH SAME TYPE AND
RATINGS OF FUSE.
NOTE
1. RESISTORS
Unit: k-kΩ, M-MΩ or Ω unless otherwise noted.
Rated Power: 1/16W unless otherwise noted.
Toleranee: (J) ±5% unless otherwise noted.
MUF : RD1/4MUF
2. CAPACITORS
Unit: p-pF or u-uF unless otherwise noted.
Ratings: Capacity(F)/Voltage(V) unless otherwise noted.
CH : CCSRCH , CFTLA : CFTLA,
NO MARKED : CKSRYB or CEAT
3. NM: No Mount
CN7271
1
V+5_MD
Q
1/5
2 GND_MD
3 V-5_MD
CN4902
R7271
4 GND_MD(S)
0
KM200NA4
XFANERR
R7221 D7221
NM
22k
Power Supply for
ICEPOWER AMP INPUT STAGE & SP RELAY
CN7251
V+12_DF
1
GND_DF
2
Q
V-12_DF 1/5
3
R7251
GND_DF(S)
4
CN4903
0
V+12_RY
5
V-12_RY
6
V-12_RY
7
KM200NA7
GND_DF
SC-27
7
W
ICE_REG ASSY
(AWX9448)
Power Supply for
COOLING FAN
CN7302
XFANERR
1
FANCTLL
2 I
FANCTLH
3
V+FAN
4
CN7701
V-FAN
5
LOCK DET
6
C7222
KM200NA6
1000p/50
FAN V+FAN
OFF 0V
LOW -0.7V
HIGH +6.5V
8
A
B
C
D
V-FAN
0V
-6.5V
E
-6.5V
F
W
153
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