1991 LEXUS SC400 Service Repair Manual

Page 617 of 4087

LEXUS SC400 1991  Service Repair Manual 
7RadioWOOFER VOLUME FAINT
A. without CD player type
Wire harness faulty.Wire harness faulty.
Radio receiver assembly faulty.
Is tape player operating normally?
Is there continuity between the followi

Page 618 of 4087

LEXUS SC400 1991  Service Repair Manual 
8RadioRECEPTION POOR
Antenna cord faulty.Poor signals, poor location.
Problem with radio wave signals or location?
Go to No. 32. Check if antenna cord is OK?
Radio receiver assembly faulty.
9RadioPRE

Page 619 of 4087

LEXUS SC400 1991  Service Repair Manual 
10RadioVOLUME REMAINS AT MAXIMUM LEVEL
A. without CD player type
Wire harness faulty.Radio receiver assembly faulty.
Is tape player operating normally?
Is there continuity between the following termi

Page 620 of 4087

LEXUS SC400 1991  Service Repair Manual 
11Tape playerCASSETTE TAPE CANNOT BE INSERTED
A. without CD player type
Wire harness faulty. Radio receiver assembly faulty.
Is there continuity between the following terminals
with connector connect

Page 621 of 4087

LEXUS SC400 1991  Service Repair Manual 
B. with CD player type
Wire harness faulty. Radio receiver assembly faulty.
Is there continuity between the following terminals
with connector connected?
  Radio receiver amplifier A3 ± ground
  R

Page 622 of 4087

LEXUS SC400 1991  Service Repair Manual 
12Tape playerCASSETTE TAPE WILL NOT EJECT
A. without CD player type
Is there battery voltage between the following ter-
minals with connector connected?
 Radio receiver amplifier A3 ± ground
  Rad

Page 623 of 4087

LEXUS SC400 1991  Service Repair Manual 
B. with CD player
Is there battery voltage between the following ter-
minals with connector connected?
 Radio receiver amplifier A3 ± ground
  Radio receiver amplifier A4 ± ground Replace fuse.
W

Page 624 of 4087

LEXUS SC400 1991  Service Repair Manual 
13Tape playerDISPLAY INDICATES, BUT NO SOUND IS 
PRODUCED (EXCEPT WOOFER)
A. without CD player type
Is radio operating normally?Radio receiver assembly faulty.
Radio receiver assembly faulty. Is ther