Kenwood KDCMP 442 U Service Manual

Page 4

KDC-MP442U/MP6043U
/W5544U/W5644UY/X493

COMPONENTS DESCRIPTION

0 ELECTRIC UNIT (X34-630x-xx)

Ref. No. Application / Function Operation / Condition / Compatibility

IC1O Audio 8V REF / Power Supply Outputs 1.27V.

IC7O Digital AVR for Panel & USB Switching regulator for USB&VBUS and FDC (5V).

|C150 Power Control SW USB power control switch with over current detection and protection.

|0200 Power IC Amplifies front L/Fl and rear L/R.

|0241 E2P Memory DSP setting memory.
Selects analog source & full source volume. Analog source: AM/FM, CH, AUX.

ICZGO Source Selector & EVOL :5;::;?:;:i§csjz::fj5;;Z;S:::pfi:tDe/:Jt:? (This function consists of
lC260 and l6200)

IC301 System u-COM Reset Control Outputs Lo (system u-COM reset) when detection voltage goes below 3.6V.

IC302 System u-COM 3:221 (93:2:2;13:31:22:Imanagement, panel control, AM/FM/CH/SOC

IC303 Mute Logic Controls logic for muting.

ICSOO RDS & RBDS Decoder

010~12 Audio 8V AVR During active time, POWER is ON.

030,31 SW5V During active time, POWER is ON.

032,33 BU5V AVR During active time, POWER is ON.

040~43 Servo AVR During active time, POWER is ON.

050~53 ILLUMI AVR During active time, POWER is ON.

080 Overcurrent Protection When the base goes Hi, 4V preout AVR is OFF.

081~83 4V Preout AVR During active time, POWER is ON.

090 BU DET SW Detects the backup voltage. If the backup is detected, it is ON.

092 ACC DET SW Detects ACC voltage. If A00 is detected, it is ON.

093 Surge DET SW Detects over-input voltage. If surge is detected, it is ON.

0110413 Power Cntrol Output When the base of 0110 goes Hi, power control output is ON. During active time,
audio source IS active.

0114,115 Power ANT SW During active time, tuner source is active.

0130 Small Lamp DET SW Detects small lamp. If small lamp is detected, it in ON.

0440 Preout Mute SW Non-fader Lch

0441 Preout Mute Driver (Non-fader) When this transistor is ON, mute is active.

0442 Preout Mute SW Non-fader Rch

0450 Preout Mute SW Front Lch

0451 Preout Mute SW Front Rch

0460 Preout Mute SW Rear Lch

0461 Preout Mute Driver (F/R) When this transistor is ON, mute is active.

0462 Preout Mute SW Rear Rch

0480,481 AM+B SW During active time, AM source is active.

0520 PAN5V SW When the base goes Lo, PAN5V is ON.

0 SWITCH UNIT (X16-6500-10)
Ref. No. Application / Function Operation / Condition / Compatibility

ICZ Remote Controller Remote control receiver.

05 PAN5V When the base goes Hi, PAN5V is supplied for [02.

020 Key Scan Timing Adjustment When the base goes Hi, key scan starts.