Kenwood KAC-PS4D/X4R User manual

B53-0520-00 (N)426

KAC-PS4D

KAC-X4R

KAC-PS4D

KAC-X4R

Dressing Panel

(A21-6578-01) : KAC-X4R

(A21-6579-01) : KAC-PS4D

Screw & Wrench Key set

(N99-1795-05)

Fuse (25A)

(F52-0014-05)

Compact disc

(W01-1701-05)

KAC-PS4D/X4R

POWER AMPLIFIER

SERVICE MANUAL

This product uses Lead Free solder.

This product complies with the RoHS directive for the European market.

KAC-PS4D/X4R

BLOCK DIAGRAM

ISO ARCA IN AL VR AMP SE to DIF

ADC Ach

SE to DIFISO A AMPVR

SE to DIF

ISO A

AMP

ADC Bch

RCA IN AR

RCA IN BR

RCA IN BL

DSP

IC1IC307

15V 15V 15V 5V,3.3V

DRIVER PWR FET FILTER

DRIVER

PWR FET

FILTER

FEEDBACK, DPSC, ADCS

OVERCURRENT DETECTION

SP OUT AL

SP OUT AR

SP OUT BL

SP OUT BR

HV, 15V

12V,5V,3.3V,1.8V

L/R

DAC

12V REG

E2PROM

CURRENT

DETECTOR

DETECTOR-1

VOLTAGE

TEMPERATURE

DETECTOR

OUTPUT DC

5V-3V

INTERFACE

RCA OUT

L/R

ROTARY

ENCODER

DETECTOR

PCON

RESET IC

REG

3.3V SW

P/S FDFWD

DAC

ADC

DSP

USB

ANTI PUMP

FEED BACK

SPDIF

REG

1.8V SW

DSP

A5V REG

D5V REG

DAC

ADC

P/S FDFWD

FEED BACK

SPDIF

ANTI PUMP

FINAL

FEED BACK

ANTI PUMP

+HV REG

HV REG

CONTROL

PWM

FILTER

FUSE

GND

BATT14.4V

REG

BU5V

SWITCH

SLIDE

DRIVER FL

P/S FDFWD

FEED BACK

SE to DIF

ISO AMP

FINAL

ANTI PUMP

MICRO

VOLTAGE

DETECTOR-2 COMPUTER

MICRO

REG

+14.5V SW

5V, 3.3V

IC900

15V REG

IC310

IC511

IC510

IC503

IC500

IC512

IC705

Q911

IC101,102,201,202

ON/OFF CONTROL

TRANSFORMER*2

KAC-PS4D/X4R

COMPONENTS DESCRIPTION

●PREAMPLIFIER UNIT (X08-4350-10)

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

IC1 AR/BRch 8dB buffer-amp

IC2 AL/BLch 8dB buffer-amp

IC100 FL driver and Key Matrix Communicate with microcomputer (on X09 unit).

●AUDIO UNIT (X09-8620-10)

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

IC1 DSP (digital ampliﬁer processor)

IC3 reset detect 3.3V VDD for DSP etc

IC100,200,604 buffer

IC101,102,201,202 MOS FET driver

IC301,302,401,402 Isolation amp to reduce common mode noise

IC303,304,403,404 Amp for differential input of AD converter

IC306 Buffer amp for common voltage of AD converter

IC307 4ch AD converter for analog input

IC309 Low pass ﬁlter for Line out

IC310 DAC for pre-out

IC500 Error Amp for +/-16V regulator

IC502 SW power supply control IC

IC503 12V voltage regulator

IC507 buffer for sync clk

IC509 14.5V SW regulator

IC510,511 dcdc converter for 3.3V and 1.8V

IC512 5V voltage regulator

IC601 Amp for differential input of AD converter

IC602 Buffer amp for common voltage of AD converter

IC603,704,804 AD Converter for feedback

IC605 FET driver for (Q601,602) (Anti-pump circuit)

IC701,702,801,802 Amp for differential input of AD converter

IC703 Buffer amp for common voltage of AD converter

IC705 5V voltage regulator

IC900 system micro

IC901 control line 3.3V ↔ 5V translation buffer

IC902 E2PROM for installer memory, error log.

IC904 Amp for sensing GND voltage

Q101~104,201~204 SW transistor for SP output line

Q105~108,205~208 Current protection detect

Q109,110,209,210 on/off SW of N_HB_ERR (SP out over current det.)

Q111,112,114,115,

Q211,212,214,215 Speaker mute TR

KAC-PS4D/X4R

COMPONENTS DESCRIPTION

Pin No. Application / Function Operation / Condition / Compatibility

Q113,116,213,216 SP Mute driver

Q301,401 Mute circuit of Line out

Q302 Mete driver of Line out

Q303 AND circuit of SW5V & Preout Mute

Q503~508 Driver of SW power supply

Q509~516 SW transistor for SW regulator

Q517 AVR of +16V

Q520 AVR of -16V

Q521~523 AVR on/off control (1.8V → 3.3V on)

Q524 Interception circuit of VFL

Q525 Secondarily stage of Darlington AVR of VFL and FIL+

Q526 primary stage of Darlington AVR of VFL and FIL+

Q527~529 Secondarily stage of Darlington AVR of FIL+

Q530 primary stage of Darlington AVR of FIL+

Q531 Interception circuit of VFL

Q533 ﬁxed current supply of +/-16V

Q601,602 SW transistor for Anti-pump circuit

Q603,604 current detect for Anti-Pump circuit

Q605 on/off SW of N_PSCURR (Anti-pump over current det.)

Q901 On/off SW of SW5V

Q902 Logo LED driver

Q903 inverter of +40V detect circuit

Q904 Interception circuit of B14V

Q905 On/off SW of Q904

Q906,907 SP DC detect circuit

Q908 Interception circuit of SW5V

Q909 Protect circuit for Vdd5V

Q910 NF control for Vdd5V

Q911 Interception circuit of BU5V

Q912 On/off SW of SW14V

Q913 Interception circuit of SW14V

Q914,915 P-con detector

Q916 BATT14V down detector

Q917 Inverter of FAN CTRL line from µ-con

Q918 On/off SW of FAN+B

Q920 Secondarily stage of Darlington AVR of FAN+B

Q922,923 On/off SW of SP MUTE

Q924 Inverter of OUT_OF_BOOT line

KAC-PS4D/X4R

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM µ-COM 78F0536GK011A (X09-862 : IC900)

Pin No.

Pin Name I/O Application Processing / Operation / Description

1 /P_CON I Clear the stop mode by P-CON ON L: Clear the stop mode (INTP0)

H: (P120)

2~5 NC O Not used Output L ﬁxed

6 /RESET I Reset

7 OVF I ADC overﬂow detection H: When the overﬂow is detected displays on VFD

8 NC O Not used Output L ﬁxed

9 FLASH_W I Used when writing in the ﬂash

10,11 NC O Not used Output L ﬁxed

12 REGC -

13 VSS - Connect to GND

14 EVSS - Connect to GND

15 VDD - Connect to VDD

16 EVDD - Connect to VDD

17 D2_CLK I/O D2 control (75kHz max) I2C BUS

18 D2_DATA I/O D2 control I2C BUS

19 /N-ERROR I Over current detection

L: Enter the protection mode when the over current is

detected. Turn off the ampliﬁer power supply and display the

error (E-03).

Automatically recover in 200msec.

20 NC O Not used Output L ﬁxed

21 /OC_DET I Over current detection

Check current every 1ms, and when “L” is detected 15 times

in succession the over current is detected and enter the over

current protection mode. Turn off the ampliﬁer power supply

and display the error (E-03).

Automatically recover in 200msec.

22 /D2_RESET O Reset TENZING L=RESET

23 /D2_RST_DET I Tenzing reset detection

When Low is detected at pin23 while the pin22 of the µ-com

is High,temporarily turn off the amplifier and reboot the

system.

24,25 NC O Not used Output L ﬁxed

26 /PREOUT_MUTE O Mute the pre-out L: MUTE ON

27 /DSP_MUTE O Mute TENZING L: MUTE ON

28~30 NC O Not used Output L ﬁxed

31 /SP_MUTE O Mute the speaker output L: MUTE ON

32 OUT_OF_BOOT I Receive BOOT completion status from

TENZING L: Tenzing BOOT completion (DSP is in its operation)

33 BOOT_CTRL (Not Used) I DSP BOOT control

(No µ-com control)

L: BOOT from µ-com

H: BOOT from EEPROM

34 ROTARY_CW I Encoder pulse input Detect pulse phase difference

35 ROTARY_CCW I Encoder pulse input Detect pulse phase difference

36 14V_SW O SW14V ON/OFF SW14V ON/OFF

Ampliﬁer power supply ON: H, Initial condition L

KAC-PS4D/X4R

Pin No.

Pin Name I/O Application Processing / Operation / Description

37 5V_SW O SW5V ON/OFF SW5V ON/OFF

Power supply ON: H, Initial condition L

38 VD DOWN I Detection of voltage at momentary

power down

H: Processing to detect voltage at momentary power down

(Enter the stop mode when the P-CON is down.)

39 FAN_CTRL O FAN control H: FAN_ON

40 PON_ILLUM O LOGO LED+B SW H: ON, L: OFF, Initial condition L

41 PON_FL O FL power supply (Grid and Filament)

control H: ON, L: OFF

42 /VFD_INH (/BLK) O Inhibit FL driver display H: Display, L: No display

43 VFD_CE O

44 VFD_DATA_M (FVD.DI) O

45 VFD_DATA_S (FVD.DO) I

46 VFD_CLK O

47 AVREF - DA REF voltage

48 AVSS -

49 AD_V I Detects BU voltage (For display) Displays the voltage and condition.

50 AD_I I Detects primary current (For display) Converts into the current and displays current value.

51 TEMP6 I Temperature detection 6 (at power