Component Description - Kenwood KRC-509S Service Manual

QQ
3 7 63 1515 0
SYNTHESIZER UNIT (X14-xxxx-xx)
REF
No.
Q1-4 PREOUT MUTE SW
Q17,20 AUDIO 8V AVR
Q18 PANEL 5V SW
Q21,22 B.U. 5V AVR
Q23 SW 5V
Q24 BACK-UP DETECTION
Q25 ACC DETECTION
Q26,27 P-ANT SW
Q28-31 P-CON SW
Q32 DIMMER SW
Q33,34 ILLUMINATION AVR
Q35,36 SW 14V
Q37,38 MOTOR DRIVER POWER SUPPLY
Q39 EXTERNAL AMPLIFIER CONTROL
Q40 ILLUMINATION AVR
Q41,42 MOTOR SW
Q44 ILLUMINATION AVR
Q45 PANEL 5V SW
Q71 PREOUT MUTE DRIVER
Q72 E-VOL MUTE SW
Q73 NOISE BUFFER
TE
L 13942296513
Q86,88 AM+B SW
Q87,89 FM+B SW
Q90 COMPOSITE OUTPUT BUFFER
Q92 IFC BUFFER
Q95 MSTC SW
IC1 SYSTEM u-COM
IC2 E-VOL / NOISE CHANCELLOR / MPX
IC4 POWER IC
IC10 MUTE LOGIC
IC11 RDS DECODER
IC13 MOTOR DRIVER
IC15 RESET
IC16 DOLBY
SWITCH UNIT (X13-9960-13)
REF.
No.
Q1 KEY DETECTION SW
Q5 LCD REFERENCE VOLTAGE SUPPLY
Q6 REMOTE IC POWER SUPPLY
www
Q7 DIMMER SW
IC1 LCD DRIVER
IC2 REMOTE SENSOR
.

COMPONENT DESCRIPTION

FUNCTION
FUNCTION
x ao u163
y
i
KRC-509S/689
2 9
8
OPERATION
Preouts are muted when the base level goes "H".
Q20 is turned on when Q17's base level goes "H".
Q45 is turned on when Q18's base level goes "H".
Q22 is turned on when Q21's base level goes "H".
ON when the base level goes "L".
ON when the base level goes "H" during the back-up works.
ON when the base level goes "H" during the ACC works.
Q26 is turned on when Q27's base level goes "H".
Q28 is turned on when Q31's base level goes "H".
ON when the base level goes "H" while vehicle small lamps turn on.
ON when Q44's base level goes "H".
Q36 is turned on when Q35's base level goes "H".
Q38 is turned on when Q37's base level goes "H".
ON when the base level goes "L".
ON when Q44's base level goes "H".
Q42 is turned on when Q41's base level goes "H".
ON when Q44's base level goes "H".
Q45 is turned on when Q18's base level goes "H".
ON when the base level goes "L".
ON when the base level goes "H".
Q Q
3 6 7 1 3 1 5
Q88 is turned on when Q86's base level goes "H".
Q89 is turned on when Q87's base level goes "H".
Q95 is turned on when MS mode level goes "H".
OPERATION
Starts key scan.
Stabilises voltage circuit.
Remote controller works when the base level goes "L".
Usually the base level is "H". During the dimmer on, the base level
goes "H" and "L" repeatedly in a moment.
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
3