Section 2 Specific Service Instructions - Kenwood DPX-U5130 Service Manual

2.1 COMPONENTS DESCRIPTION
2.1.1 ELECTRIC UNIT (X34-747x-xx)
Ref. No. Application / Function
IC1 Power Supply IC
IC21 1.2V AVR IC
IC51 Switching Regulator
IC61 Switching Regulator
IC71 USB5V AVR IC
IC91 Hi-side SW
IC131 Muting logic IC
IC201 Power IC
IC251 E-Vol
IC301 TUNER IC
IC302 1.2V AVR IC
IC461 Level shift
IC462 Level shift
IC701 DAC3.3V AVR IC
IC801 System u-com
IC831 Flash ROM
IC841 Reset IC
IC851 EEPROM
IC861 iPod Authentication IC
Q131 SERGE Det.
Q132 BU.Det.
Q133 ACC Det.
Q134 ILLUMI Det.
Q231,Q232 Pre-out mute SW
Q233,Q234 Pre-out mute SW
Q235,Q236 Pre-out mute SW
Q237 Mute driver for PRE OUT
Q402 A+5V AVR
Q701,Q702 SW3.3V SW
Q703,Q704 DAC3.3V SW
Q861 iPod3.3V SW
Q901 Panel 3V SW
2.1.2 SWITCH UNIT (X16-743x-xx)
Ref. No. Application / Function
IC601 LCD Driver
IC602 Remote Control Sensor
IC603 LED Driver
IC604 LED Driver
Q601 Variable LED drive
Q602 Variable LED drive
Q603 Variable LED drive
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Output 3.3V×2, 8V, 8.5V,10.5V, P-CON, P-ANT
Power supply for Back up+1.2V(to u-com)
Power supply for D+6V(to Power supply IC/USB5V AVR IC)
Power supply for D+3.3V(to BT/CD/Panel Fil)
Power supply for USB5V(to USB/2DIN Panel/SXM)
Detection of USB Over Current
Controls logic for muting
Amplifies the front L/R and the rear L/R to 50W maximum.
Controls the source, volume, tone.
AM/FM radio receiver.
Power supply for D+1.2V(to Tuner IC)
3.3V to 5V(Communicates with SXM Tuner).
5V to 3.3V(Communicates with SXM Tuner).
Power supply for DAC3.3V(to CD mechanism)
Controls FM/AM tuner, CD mechanism, Panel, volume and tone etc.
For memory of syscom software
''Lo'' when detection voltage goes below 2.8V
For Log memory etc
For Apple authentication.
When Q131's base goes Hi, Serge voltage is detected.
ON when the base goes "Hi"during BU is applied.
ON when the base goes "Hi"during ACC is applied.
When Q105's base goes Hi, Illumi is detected.
When a base goes Hi, Pre-out is muted.
When a base goes Hi, Pre-out is muted.
When a base goes Hi, Pre-out is muted.
ON when the base goes "Lo".
When Q402's base goes Hi, AVR outputs 5V
When Q702's base goes Hi, AVR outputs 3.3V
When Q704's base goes Hi, AVR outputs 3.3V
ON when the base goes "Lo".
ON when the base goes "Lo".
Controls LCD and Key
Output remote signal when IR of Remote controler
LED is controlled. (D602,603,604,605,606,607,609,610,611,608)
LED is controlled. (D608,615)
BLUE of D602,603,604,605,606,607 are turned on when Q601 turn on.
GREEN of D602,603,604,605,606,607 are turned on when Q602 turn on.
RED of D602,603,604,605,606,607 are turned on when Q603 turn on.
(No.WA063<Rev.003>)8/31
Operation / Condition / Compatibility
Operation / Condition / Compatibility