Kenwood XXV-02A - 25th Anniversary Products... User manual

© 2005-4 PRINTED IN JAPAN
B53-0283-00 (N)1553
POWER AMPLIFIER
XXV-02A
SERVICE MANUAL
* Depends on the destination. Refer to the parts list.
0
1
2
3
4
5
6
7
8
9
30
30
FUSE(30A 2) POWER IN RESETREMOTETO H/UID NUMBER
VOLTFAN
CURRTEMP
MENU
Heat sink
(F01-1796-01)
Screw & Wrench key set
(N99-1770-15)
Screw set
(N99-1577-15)
Accessory
(W01-1606-05)
Screw
(N07-0003-08) Screw (N09-4214-08)
Fuse (30A)
(F52-0015-05)
channel Power Amplifier 432
channel
Power
Amplifier
432
* Cover
(F07-xxxx-xx)
"eXcelon" is not printed
on European Model
"eXcelon" is not printed
on European Model
* Dressing plate
(A21-xxxx-xx)
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0 9 9
2
8 9
4 2
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T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

XXV-02A
2
BLOCK DIAGRAM
●PREAMPLIFIER UNIT (X08-4240-10)
Ref. No Application / Function Operation / Condition / Compatibility
IC1 (1/4, 2/4) : Ach HPF, (2/4) :ALch buffer, (3/4) :BRch invert buffer
IC2 Bch infrasonic filter
IC4 (1/4, 2/4) : Bch HPF, (3/4, 4/4) : Bch LPF
IC5 Bch buffer
IC6 (1/2) : BLch buffer, (2/2) : BRch invert buffer
IC7 LCD driver, key scan
IC8 Bch E-VOL IC When AMP-CON SW ON, from H/U (via Lx-Bus) change
sound by AMP-CONTROL
COMPONENTS DESCRIPTION
(X09-5940-10) (X08-4240-10)
ISOLATION
HIGH
AMPLIFIER
R
L BUFFER
VR3
IC3
Q42
Q41
MUTE1 DIFFERENTIAL
STAGE
Q305,307,311
Q306,308,312
IC1
Q320,322
STAGE
B-CLASS
Q323,325
R
LIC3
VR5
IFS
IC2 Q405,407,411 Q43 Q423,425
Q406,408,412
Q44 Q424,426
DC DETECTOR
OVER LOAD
Q56,57,60,61
Q30,31
CIRCUIT
P. CON
OVER VOLTAGE
CIRCUIT
I DETECTOR
BU DETECTOR
P-SW
SW5V
BU5V
Q25
DC/DC
CONVERTER
Q17,18,26
AVR
POP NOISE CIRCUIT
MUTE2
Q22
901,902
Q50-53
FAN
RST IC
E2PROM
I2C COMMUNICATION
to AMP
5L COMMUNICATION
to H/U
LOGO LED
DIP SW
DISPLAY
LCD DRIVER IC LCD KEY LED+B
MUTE1 DIFFERENTIAL
STAGE STAGE
B-CLASS
MUTE1 DIFFERENTIAL
STAGE STAGE
B-CLASS
MUTE1 DIFFERENTIAL
STAGE STAGE
B-CLASS
VR1
VR1
PASS
BUFFER
AMPLIFIER
ISOLATION
AMPLIFIER
ISOLATION
AMPLIFIER
ISOLATION
PASS
HIGH
HIGH
PASS
LOW
PASS
HIGH
PASS
PASS
LOW
BUFFER
BUFFER
VR2
IFS
CONTROL
AMP
IC SW5
RCA IN
RCA IN
RCA IN
RCA IN
ACH
BCH
VR4
IC1
IC1
IC1 IC2 IC3
VR2
VR5
VR4
SW5
VR3
IC3
SP
OUT
OUT
SP
OUT
SP
OUT
SP
THERMAL
PROTECTION
DETECTOR
DETECTOR
V-DOWN
Q11-16,
u-COM
BU
PCON
VCC
15V/-15V
COMMUNICATION I2C
V
V
6db 6db 27db
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4 2
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T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

XXV-02A
3
COMPONENTS DESCRIPTION
●AUDIO UNIT (X09-5940-10)
Ref. No Application / Function Operation / Condition / Compatibility
IC1,2 Input isolation amplifier
IC3 Microprocessor
IC4 Microprocessor reset IC
IC6 Current detection circuit voltage amplification
IC8 LX communication LX-CLK, LX-DATA-M comparator
IC9 AMP I2C communication signal level converter
IC10 Switching regulator
Q1 14V power supply for LX communication circuit and AMP communication IC
Q2 VDD 5V AVR
Q7~10 FET drive
Q11~16 DC/DC converter
Q17,26 +15.6V AVR
Q18,27 -15.6V AVR
Q20,21 Switching regulator power switch
Q22,24 VDD 5V AVR
Q25 SW5V
Q30,31 Standby, P-CON
Q41~44 Mute driver
Q50~53 Shock noise prevention
Q54 Mute
Q56,57 Output DC abnormal voltage detection
Q58 Logo LED power supply
Q59 LCD illumination power supply
Q61 Over current detection and protection
Q62~67 Fan operation circuit
Q73,77 BU over voltage detection
Q74,75 FET drive low start switch
Q80~83 LX communication input signal level converter
Q84 LX communication circuit power supply and AMP communication IC1 power switch
Q85,86,90,92~96,98 LX communication output signal level converter
Q91 14V power supply for LX communication circuit and AMP communication IC
Q210 Ach first stage differential amplifier
Q212,311,411,412 Temperature compensation bias
Q301~309,312 Ach first stage differential amplifier
Q314,319,321
Q315~318,415~418 Over current detection and protection
Q320,322,323,325 Ach final current amplifier
Q401~410 Bch first stage differential amplifier
Q423-426 Bch final current amplifier
Q901,902 DC/DC converter
Q905,906,945,946,967 1dB attenuation circuit
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7
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1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

XXV-02A
4
AMP_SCL LX_REQ_M
LX_REQ_S
LX_DATA_M
LX_DATA_S
LX_CLK
LX_RST
HU_BU
AD-I
AD-V
TEMP1
TEMP2
TEMP3
TEMP4
TEMP5
TEMP6
COMM-SW
D-PWER
POWER-ON
5VSW
V_DOWN
PCON
LX_CON
L_DATA_L
L_DATA_A
L_CLK
L_CE
FAN1
FAN2
AMP_SDA
AUDIO_SCL
AUDIO_SDA
AUDIO_MUTE
E2P_SCL
E2P_SDA
LCD-ILL
WHITE-LED
MUTE1
MUTE2
DIP-SW1
DIP-SW2
DIP-SW3
DIP-SW4
MODEL1
MODEL2
DC-DET
D-CUR
AB-CUR
ATT1
ATT2
ATT3
AMP µ-com
784224YGC117
Audio control
AMP communication I/F LX BUS I/F
Display data monitor
Power supply control
LCD driver I/F
Fan control
Destination, AMP ID
Protection control
Illumination control
Mute control
E2PROM I2C
communication
●MICROPROCESSOR : 784224YGC117 (X09 : IC3)
◊Block Digram
◊Terminal Function
Pin No. Pin Name I/O Function Processing Operation Description
1~3 TEMP4~TEMP6 I Temperature detection 4~6
4AVSS - GND
5L_CE O CE output to LCD driver H : LCD driver CE
6 LX_REQ_S O Data transmit request to H/U H : OFF, L : ON
7AVREF1 - DA reference voltage
8L_DATA_L I Data input from LCD driver
9L_DATA_A O Data output to LCD driver
10 L_CLK O CLK output to LCD driver
11 LX_DATA_M I Data input from H/U
12 LX_DATA_S O Data output to H/U
13 LX_CLK I CLK input from H/U
14 LX_BU I LX BUS communication, H/U connect detection H : Not connect (Except master amplifier), L : Connect
15 NC O Not used
16 SDA_AMP I/O Data input/output AMP communication
17 NC O Not used
MICROCOMPUTER’STERMINAL DESCRIPTION
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

XXV-02A
5
Pin No. Pin Name I/O Function Processing Operation Description
18 SCL_AMP I/O CLK input/output AMP communication
19 AUDIO_SCL I/O CLK input/output with audio chip
20 AUDIO_SDA I/O Data input/output with audio chip
21 AUDIO_MUTE O Mute output to audio chip H : Mute OFF, L : Mute ON
22 E2P_SCL I/O CLK input/output with E2PROM
23 E2P_SDA I/O Data input/output with E2PROM
24 NC O Not used
25~28 DIP-SW1~DIP-SW4 IAMP address setting
29 MODEL1 I Model setting 1
30 MODEL2 I Model setting 2
31,32 NC O Not used
33 VSS1 - GND
34~37 NC O Not used
38 LCD-ILL O LCD backlight switch H : ON, L : OFF
39 WHITE-LED O Triangle illumination switch H : ON, L : OFF
40 NC O Not used
41~43 ATT1~ATT3 O Output attenuate due to rise in temperature 1~3 H : Attenuate, L : Not attenuate
44,45 NC O Not used
46 COMM-SW O Communication IC power switch H : ON, L : OFF
47~50 NC O Not used
51 D-PWER O D class amplifier power supply control H : ON, L : OFF (2ch/4ch L fixed)
52 DC-DET I Speaker output DC voltage detection H : Normal, L : Abnormal
53 NC O Not used
54 POWER-ON O Amplifier power supply control H : ON (D/AB class), L : OFF
55 5VSW O 5VSW H : OFF, L : ON
56 MUTE1 O Amplifier section input stage mute control H :OFF, L : ON
57 MUTE2 O Driver stage pop-noise mute control H : OFF, L : ON
58 FAN1 O Fan rotation control H : Operate, L : Stop
59 FAN2 O Fan speed control H : Low speed, L : High speed
60 RESET - Hard reset H : Normal, L : Reset
61 PCON I Amplifier power control H : OFF, L : ON
62 LX_CON I LX-BUS communication control H : OFF, L : ON
63 LX_REQ_M I Data receive request from H/U H : ON, L : OFF
64 NC O Not used
65 V_DOWN I Momentary power down detection H :ON (Power down detection), L : OFF (L fixed)
66 NC O Not used
67 VSS0 - GND
68 VD1 - VDD
69 X2 - Main clock input 1
70 X1 - Main clock input 2
MICROCOMPUTER’STERMINAL DESCRIPTION
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299