CD changer LEXUS SC300 1991 Service Repair Manual
[x] Cancel search | Manufacturer: LEXUS, Model Year: 1991, Model line: SC300, Model: LEXUS SC300 1991Pages: 4087, PDF Size: 75.75 MB
Page 583 of 4087
MAINTENANCE OF TAPE PLAYER
Head Cleaning
Using a moist±type cleaning tape, clean the head surface, pinch rolle\
rs and capstans.
COMPACT DISC PLAYER
Compact Disc (hereafter called ºCDº) players use a laser beam pick±up\
to read the digital signals recorded
on the CD and reproduce analog signals of the music, etc. There are 4.7 in\
. (12 cm) and 3.2 in. (8 cm) CD
available, but it is recommended that you do not use 3.2 in. (8 cm) discs in the\
CD auto changer.
HINT: Never attempt to disassemble or oil any part of the player unit. Do not\
insert any object other than
a disc into the magagine.
NOTICE: CD players use on invisible laser laser beam which could cause hazardou\
s radiation expo-
sure. Be sure to operate the player correctly as instructed.
±
BODY ELECTRICAL SYSTEM Audio SystemBE±197
WhereEverybodyKnowsYourName
Page 594 of 4087
(With CD player)
Check forTester connectionConditionSpecified value
VoltageA4±GroundConstantBattery voltage
A3±GroundIgnition switch positionACC or ONBattery voltageg
LOCKNo voltage
A2±GroundLight control switchTAIL or HEADBattery voltageg
positionOFFNo voltage
If circuit is not as specified, refer to BE±201, 203 wiring dia-
grams and inspect the circuits connected to other parts.
HINT: Check the wire harness between radio receiver assem-
bly and the CD auto changer, between radio receiver assem-
bly and power amplifier, in accordance with the wiring dia-
grams in BE±201, 203.
(Front Door Speaker)
REMOVAL AND INSTALLATION OF
FRONT DOOR SPEAKER
(See page BO±35)
(Tweeter)
REMOVAL AND INSTALLATION OF
TWEETER
(See page BO±34)
(Rear Speaker)
REMOVAL AND INSTALLATION OF
REAR SPEAKER
1. REMOVE REAR SPEAKER
(a) Remove the package tray trim.
HINT: (See page BO±124)
(b) Remove eight bolts.
(c) Disconnect connectors and remove the rear speaker.
2. INSTALL REAR SPEAKER For installation, follow the removal procedure in reverse.
BE±208
±
BODY ELECTRICAL SYSTEM Audio System
WhereEverybodyKnowsYourName
Page 596 of 4087
(c) Disconnect the connector and remove the wooferamplifier.
2. INSTALL WOOFER AMPLIFIER For installation, follow the removal procedure in reverse.
INSPECTION OF WOOFER AMPLIFIER
INSPECT WOOFER AMPLIFIER
(Circuit)
Disconnect the connector from woofer amplifier and inspect
the connector on the wire harness side as shown.
Check forTester connectionConditionSpecified value
Continuity7±GroundConstantContinuity
Voltage3±GroundConstantBattery voltage
4±GroundIgnition switch positionACC or ONBattery voltage
6±Ground
g
LOCKNo voltage
If circuit is not as specified, refer to BE±201 wiring diagrams
and inspect the circuits connected to other parts.
(Power Amplifier)
REMOVAL AND INSTALLATION OF
POWER AMPLIFIER
(Pioneer)
1. REMOVE POWER AMPLIFIER (a) Remove the RH side cover.
(b) Remove the CD auto changer (See page BE±212).
(c) Disconnect two connectors and remove three nuts and the power amplifier with the bracket.
(d) Remove four bolts and the power amplifier.
2. INSTALL POWER AMPLIFIER For installation, follow the removal procedure in reverse.
BE±210
±
BODY ELECTRICAL SYSTEM Audio System
WhereEverybodyKnowsYourName
Page 597 of 4087
(Nakamichi)
1. REMOVE POWER AMPLIFIER
(a) Remove the RH side cover.
(b) Remove the CD auto changer (See page BE±212).
(c) Disconnect three connectors and remove three nuts and the power amplifier with the bracket.
(d) Remove four bolts and the power amplifier.
2. INSTALL WOOFER AMPLIFIER For installation follow the removal procedure in reverse.
POWER AMPLIFIER INSPECTION
INSPECT POWER AMPLIFIER
(Circuit)
Disconnect the connector from power amplifier and inspect
the connector on the wire harness side as shown.
(Produced by PIONEER)
Check for Tester connection Condition Specified value
Continuity B7±Ground Constant Continuity
Voltage B10±Ground Constant Battery positive voltage
A14±Ground
A6 G d
Ignition switch position ACC or ON Battery positive voltage A6±Ground LOCK No voltage
If circuit is not as specified, refer to BE±201 wiring diagrams
and inspect the circuits connected to other parts.
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEMBE±211
WhereEverybodyKnowsYourName
Page 598 of 4087
(Produced by NAKAMICHI)
Check for Tester connection Condition Specified value
Continuity
B7±Ground
C7±Ground
Constant
Continuity
Voltage
B10±Ground
C3±Ground
Constant
Battery positive voltage
A6±Ground
A14±Ground
Ignition switchposition
ACC or ON
Battery positive voltage
C4±Ground
C6±Ground
Ignition switch position
LOCK
No voltage
If circuit is not as specified, refer to
BE±203 wiring diagrams
and inspect the circuits connected to other parts.
CD AUTO CHANGER
CD AUTO CHANGER REMOVAL AND
INSTALLATION
1. REMOVE CD AUTO CHANGER (a) Remove RH side cover.
(b) Disconnect two connectors.
(c) Remove three bolts, one nut and the CD auto changer.
CD AUTO CHANGER INSPECTION
INSPECT CD AUTO CHANGER(Circuit)
Disconnect connectors from CD auto changer and inspect
the connector on the wire harness side as shown.
BE±212
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEM
WhereEverybodyKnowsYourName
Page 599 of 4087
Check for Tester connection Condition Specified value
Voltage A4±Ground Constant Battery positive voltage
A3±Ground
Ignition switch
iti
ACC or ON Battery positive voltage
A3±Ground position LOCK No voltage
Continuity
A7±Ground
Luggage compartment
d t it h
Push (OFF) No continuity A7±Ground door courtesy switch Free (ON) Continuity
If circuit is not as specified, refer to BE±201, 203 wiring dia-
grams and inspect the circuits connected to other parts.
HINT:
w Check the wire harness between the radio receiver
assembly and the CD auto changer in accordance with
the wiring diagrams in BE±201, 203.
w Since the signals to and from the CDL+, CDL, CDR+,
CDR, TXM+, TXM, TXS+ and TXS terminals are serial
signals, they cannot ordinarily be measured with a
tester.
LUGGAGE COMPARTMENT DOOR
COURTESY SWITCH
(See page BE±82)
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEMBE±213
WhereEverybodyKnowsYourName
Page 605 of 4087
\
\
Problem No.
\
\
Radio not operating when power switch turned to ºONº 1
\
\
\
Display indicates when power switch turned to ºONº, but no sound (\
including ºnoiseº)
is produced (except woofer).
2
\
\
Noise present, but AM±FM not operating 3
Radio
\
\
Any speaker does not work (except woofer). 4
Radio\
\
Volume faint (except woofer). 5 \
\
Woofer does not work. 6
\
\
\
Woofer volume faint.
7
\
\
Reception poor. 8
\
\
Preset memory disappears. 9
\
\
Volume remains at maximum level. 10
\
\
Cassette tape cannot be inserted. 11
\
\
Cassette tape will not eject. 12
\
\
Display indicates, but no sound is produced (except woofer). 13 \
\
Any speaker does not work (except woofer). 14
Tape player
\
\
\
Volume faint (except woofer).
15
\
\
Woofer does not work. 16
\
\
Woofer volume faint. 17
\
\
Sound quality poor. 18
\
\
Volume remains at maximum level. 19
\
\
Magazine cannot be inserted into auto changer. 20
\
\
Magazine is inserted, but display does not indicate ºCDº. 21 \
\
Display indicates, but no sound is produced (except woofer). 22
\
\
\
Any speaker does not work (except woofer).
23
CDplayer\
\
Volume faint (except woofer). 24
CD player\
\
RH channel or LH channel speaker volume faint. 25
\
\
Woofer does not work. 26
\
\
Woofer volume faint. 27
\
\
Sound quality poor. 28
\
\
Volume remains at maximum level. 29
Noise
\
\
Noise produced by vibration or shock while driving. 30
Noise\
\
\
Noise produced when engine starts.
31
Antenna\
\
Antenna±related. 32
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEMBE±219
WhereEverybodyKnowsYourName
Page 635 of 4087
20CD playerMAGAZINE CANNOT BE INSERTED INTO AUTO
CHANGER
Is radio operating normally?
Is there battery voltage between the following termi-
nals with connector connected?
Radio receiver assembly C5 ± ground
Is there continuity between the following terminals
with connector disconnected?
CD auto changer A4 ± Radio receiver assembly C5
Is there continuity between the following terminals
with connector disconnected?
CD auto changer A9 ± ground
CD auto changer faulty. Wire harness faulty.
Radio receiver assembly faulty.
Go to No. 1.
Is there continuity between the following terminals
with connector disconnected?
CD autochanger A9 ± Radio receiver assembly C4
Wire harness faulty. Radio receiver as-
sembly faulty.
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEMBE±249
WhereEverybodyKnowsYourName
Page 636 of 4087
21CD playerMAGAZINE IS INSERTED, BUT DISPLAY DOES
NOT INDICATE ºCDº
Is radio operating normally?
Is there battery voltage between the following
terminals with connector connected?
Radio receiver assembly C12 ± ground
Wire harness faulty.Radio receiver assembly faulty.
Go to No. 1.
Is there battery voltage between the following
terminals with connector connected?
Radio receiver assembly C12 ± CD auto
changer A3
Is there battery voltage between the following
terminals with connector connected?
Radio receiver assembly C3 ± CD auto changer
B1
Radio receiver assembly C8 ± CD auto changer
B3
Radio receiver assembly C9 ± CD auto changer
B2
Radio receiver assembly C10 ± CD auto changer
B10
Is there battery voltage between the following
terminals with connector disconnected?
Radio receiver assembly C3 ± ground
Radio receiver assembly C8 ± ground
Radio receiver assembly C9 ± ground
Radio receiver assembly C10 ± ground
Temporarily install another CD auto changer.
Functions OK? CD auto changer faulty. Wire harness faulty.
Wire harness faulty.
Radio receiver assembly faulty
BE±250±
BODY ELECTRICAL SYSTEM AUDIO SYSTEM
WhereEverybodyKnowsYourName
Page 637 of 4087
22CD playerDISPLAY INDICATES, BUT NO SOUND IS
PRODUCED (EXCEPT WOOFER)
Is radio operating normally?Wire harness faulty.
Is there battery voltage between the following ter-
minals with connector connected?
Power amplifier A14 ± ground
Power amplifier A10 ± ground
Wire harness faulty.
Is there battery voltage between the following ter-
minals with connector connected?
Power amplifier A6 ± ground
Is there battery voltage between the following ter-
minals with connector connected?
Power amplifier A7 ± ground Is there battery voltage between the following ter-
minals with connector disconnected?
Radio receiver assembly B6 ± Power switch 13.
Is there battery voltage between the following ter-
minals with connector disconnected?
Radio receiver assembly B1±Power switch 14
Radio receiver assembly B3±Power switch 11
Wire harness faulty.
Power switch faulty.
Wire harness faulty.
Radio receiver assem-
bly faulty. Wire harness faulty.
Power switch faulty.
Is resistance value about 50 k between terminals
B3±B6 of radio receiver assembly?
Temporarily install another CD auto changer.
Functions OK? CD auto changer faulty.Is there continuity between the following terminals
with connector disconnected?
Radio receiver assembly A1±Power amplifier A6.
When the volume switch is turned from minimum to
maximum, does resistance between terminals
B1±B3 of radio receiver assembly changer from 0
to 50 k
Radio receiver assembly faulty.
Radio receiver assembly faulty.
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEMBE±251
WhereEverybodyKnowsYourName