POWER AMPLIFIER
KAC-PS520/X520
SERVICE MANUAL
© 2002-3 PRINTED IN KOREA
B51-7934-00 (K) 3547
30
30
ON
OFF
INFRASONIC
FILTER
LPF
OFF
HPF
B.M.S.
+12dB
OFF
REMOTE
OPERATION
MONO(L ch)
STEREO
GND
LINE OUT
EXT.AMP.CONT.
LINE IN
L
R
L
R
LEFT
BRIDGED
SPEAKER
OUTPUT
RIGHT
POWERIN
P.CON
BATT.
GN
D
FU
SE
(30Ax2
)
KAC-PS520/X520
2
MICROCOMPUTER'S TERMINAL DESCRIPTION
(X09-) IC11 : u-COM
PORT
No.
PORT NAME
I/O
FUNCTION
OPERATING CONDITION
1
+5V SW
O
Controls small-amount current.
"L" : SW 5V on.
2-
-
-
-
3
FAN
O
Controls fan rotation.
"H" : Fan on.
4-
-
-
-
5
D VOLTAGE
I
Detects class-D over-voltage.
"L" : Over-voltage detection.
6
V DOWN
I
Detects momentary power down.
"H" : Momentary power-down detection.
7
D CURRENT
I
Detects class-D over-current.
"L" (Class-D power on) : Over-current detection.
8
AB VOLTAGE
I
Detects class-AB over-voltage.
"L" : Over-voltage detection.
9
AB CURRENT
I
Detects class-AB over-current.
"H" : Over-current detection.
10
BLUE
O
Controls BLUE of variable illumination.
"H" : Illumination on.
11
GREEN
O
Controls GREEN of variable illumination.
"H" : Illumination on.
12
RED
O
Controls RED of variable illumination.
"H" : Illumination on.
13
TEST
-
-
-
14
RESET
-
Resets.
"L" : Reset.
15
XIN
-
-
-
16
XOUT
-
-
-
17
VSS
-
-
-
18
VAREF
-
A/D reference.
-
19
ADIN 1
I
Detects temperature.
"H" : Unusual temperature detection.
20
ADIN 2
I
Detects temperature.
"H" : Unusual temperature detection.
21
ADIN 3
I
Detects temperature.
"H" : Unusual temperature detection.
22
ADIN 4
I
Detects temperature.
"H" : Unusual temperature detection.
23
--
-
-
24
BASS 12dB
I
Stabilizes BMS +12dB.
"H" : BMS +12dB stabilization.
25
BASS REMO
I
Being remote-controlled from BMS head unit.
"H" : remote control available.
26
BASS OFF
I
Releases boost.
"H" : Boost off.
27
D POWER
O
Controls class-D amplifier.
"H" : Class-D amplifier on.
28,29
-
-
-
-
30
POWER
O
Controls power amplifier.
"H" : SW 14.4V on.
31
COM HU
I
Measures the head unit pulse.
-
32
OFFSET CON
O
Controls bass boost frequency offset.
"H" : Offset on.
33
BASS CON A
O
Controls bass boost frequency offset.
-
34
BASS CON B
O
Controls bass boost frequency offset.
-
35,36
--
-
-
37
STAND-BY
I
Cancels stop mode by P.CON on.
"L" : P.CON on or BACK-UP over-voltage detection.
38,39
--
-
-
40
VDD
-
VDD.
-
41
TACT SW
I
Switches color.
"H" : SW on.
42
MUTE 2
O
Controls driver stages.
"L" : Mute on.
43
MUTE 1
O
Controls amplifier input mute.
"L" : Mute on.
44
--
-
-
KAC-PS520/X520
3
ADJUSTMENT (KAC-PS520/X520)
No.
ITEM
INPUT
SETTINGS
OUTPUT
SETTINGS
RECEIVER
SETTINGS
ALIGNMENT
POINTS
ALIGN
FOR
FIG.
Connect a cassette receiver or other receiver.
1
IDEL
CURRENT
-
Connect a DC
voltmeter
between emitter
terminals of
Q35/Q36 (L/R)
and J2 (SP.OUT,
L+/R-).
VOLUME : 0
VR1 (L ch)
VR2 (R ch)
(X09-)
2.5mV
(a)
KAC-PS520/X520
4
ADJUSTMENT
(L) VR1
(R) VR2
J2
DC Voltmeter
(a)2.5mV
DC Voltmeter
(a)2.5mV
L
Q35
Q36
R
5
AC
E
BD
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD
Component side view
Foil side view
CN1
CN2
CN3
S1
X08-4090-10 (J74-1362-11)
X08-4090-10 (J74-1362-11)
CN1
S1
CN2
CN3
VR1
VR2
VR3
LPF
BMS
SENS
VR4
BRF(X810D)
HPF(X520)
1
61
1
66
VR2
VR1
BMS
SENS
16
VR3
LPF
HPF(X520)
BRF(X810D)
VR4
11
6
6