Kenwood-KACX520 caramp.pdf

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KAC-PS520/X520
POWER AMPLIFIER
KAC-PS520/X520
SERVICE MANUAL
© 2002-3 PRINTED IN KOREA
B51-7934-00 (K) 3547
OFF
INFRASONIC
B.M.S.
+12dB
OFF
REMOTE
FILTER
LPF
OPERATION
MONO(L ch)
LINE IN
LINE OUT EXT.AMP.CONT.
OFF
HPF
ON
STEREO
GND
L
L
R
R
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KAC-PS520/X520
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
-
- -
-
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KAC-PS520/X520
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)
3
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KAC-PS520/X520
ADJUSTMENT
Q35
(L) VR1
(a)2.5mV
DC Voltmeter
(a)2.5mV
L
R
(R) VR2
DC Voltmeter
J2
Q36
708538324.033.png 708538324.034.png
A
B
C
D
E
PC BOARD
1
Component side view
X08-4090-10 (J74-1362-11)
2
6
1
6
1
6
1
CN1
CN2
CN3
3
S1
VR1
VR2
VR3
LPF
VR4
BRF(X810D)
HPF(X520)
SENS
BMS
4
Foil side view
X08-4090-10 (J74-1362-11)
5
1
6
1
6
1
6
CN3
CN2
CN1
6
S1
VR4
VR3
LPF
VR2
VR1
BRF(X810D)
BMS
SENS
HPF(X520)
7
Refer to the schematic diagram for the value of resistors and capacitors.
5
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