Note: � All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. � All resistors are in � and 1/4 W or less unless otherwise specified. � C : panel designation. � U : B+ Line. � Power voltage is dc 15 V and fed with regulated dc power supply from external power voltage jack. � Voltage is dc with respect to ground under no-signal condition. � Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. � Signal path. F : AUDIO
� IC Block Diagram IC1 LA4663
RIPPLE FILTER/ STARTING TIME 1 IN1 2 PRE GND 3 INPUT AMP + � OUTPUT AMP
IN2 4 STANDBY 5
+ � INPUT AMP
OUTPUT AMP
� Semiconductor Location
Ref. No. D1 D2 D3 D4 IC1 Q1 Q2 Location D-2 D-3 F-2 F-2 D-2 E-3 E-3 Note: � X : parts extracted from the component side. � Y : parts extracted from the conductor side. � b : Pattern from the side which enables seeing.
SIGNAL MUTE VCC1 VCC2 +OUT2 POWER GND2 �OUT2 �OUT1 POWER GND1 +OUT1
