Kenwood KAC859 free download

File name Kenwood-KAC859 caramp.pdf

POWER AMPLIFIER KAC-859 SERVICE MANUAL © 2000-5 PRINTED IN KOREA B51-7626-00 (K) 3547 HEAT SINK (F01-1629-01) DRESSING PANEL (A21-4015-02) DC CORD ASSY (E30-4341-05) (J type only) LEAD TERMINAL SET (W01-1530-05) (E type only) FUSE (25Ax2) POWER IN GND P.CON BATT SPEAKER OUTPUT A BRIDGED LEFT RIGHT SUB SPEAKER LEVEL INPUT LEFT RIGHT A SPEAKER LEVEL INPUT A B B L R B FUSE SCREW TERMINAL SCREW TERMINAL SCREW TERMINAL BOARD (E52-0014-05) BOARD BOARD (E70-0821-05) (E70-0828-05) (E70-0829-05) SCREW SET (N99-1587-05) GND L 1 0.5 2 3 150Hz 0.3 4 80Hz OFF (MIN)5 0.2(MAX) 1 0.5 2 3 150Hz 0.3 4 80Hz OFF (MIN)5 0.2(MAX) 1 0.5 2 3 0.3 4 (MIN)5 0.2(MAX) 100 80 150 170 50 200 25 A.CH INPUT A.ch HPF SENSITIVITY(V) 25 R SUB TERMINAL COVER SET (W01-1515-05) STEREO MONO(Lch) OPERATION A B SUB 70 5/4/3 CHANNEL POWER AMPLIFIER B.ch HPF B.CH INPUT SENSITIVITY(V) A A B A INPUT SELECTOR B SUB SUB.CH INPUT SENSITIVITY(V) LINE IN SUB.CH LPF INPUT FREQUENCY(Hz) SELECTOR PIN JACK (E63-0849-05) 40% KAC-859 LEVEL S3 ST/MONO S4 AB/A B LEVEL LEVEL L SUB R IC3 (2/4) IC3 (3/4) LPF S5 SUB/AB 50Hz-200Hz (18dB/oct) IC3 (4/4) INFRA 15Hz (18dB/oct) 120mV 21.9V MUTE Q307 120W (4 ) SUB INPUT IC3 (1/4) KAC-859 LEVEL VOL. 2 5 CH AMP. BLOCK DIAGRAM SP-P-CON SP IC1 FILTER 80,150,OFF S1-1 (12dB/oct) 320mV L P-CON L Q101,102 40W (4 ) R 11.8V +LB -LB +HB -HB HPF IC4 (1/4) T1,T2 Q1-6 A DC/DC CONVERTER BATT A 200mV IC4 (2/4) HPF R S1-2 SP IC5 (1/4) -1 MUTE BLOCK DIAGRAM SP L IC2 80,150,OFF S2-1 HPF IC4 (3/4) IC5 (2/4) -1 [ LEVEL DIAGRAM ] dB 50 L Q201,202 40W (4 ) R 40 MONO AMP MUTE B 30 20 4ch AMP 10 0 -10 ISOLATION & FILTER POWER IC4 (4/4) HPF R SP IC5 (3/4) IC5 -1 (4/4) S2-2 KAC-859 CIRCUIT DESCRIPTION SP P-CON Switching Circuit When the SP output from the head unit is connected to SP IN, the power can be switched ON/OFF based on the DC voltage of the SP output. However, As certain head unit models output DC permanently or generate a click during switching OFF, it is required to provide the capability of previous P-CON switching. A circuit which can perform the switching without using a switch is described below. This circuit performs switching by inhibiting the operation of the S-P-CON circuit when a voltage is applied to the P-CON pin. Circuit operation description When the head unit is connected to SP-INN, the DC component in the SP output turns Q2 ON through D8 and R16. When a voltage is applied to the P-CON pin under this condition, Q13 is turned ON via R44, positive feedback is applied by combination of Q13 and Q14, Q13 and Q14 are held at ON, so the voltage at point (A) is almost 0V and the SP-P-CON circuit is not activated. This circuit holds the ON status while the DC voltage from SP is present. Therefore, in this condition, the P-CON circuit continues functioning. To cancel the functioning, the voltage at the SP-IN pin should go 0V. D11 7.5v to P-CON terminal D8 from SP-P-CON Q14 100k R44 A R16 10u 35 4.7k