Components Description; Synthesizer Unit (X14-694X-Xx) - Kenwood GX-201KEF2 Service Manual

GX-201KEF2/LEF2/REF2/SEF2
QQ
3 7 63 1515 0

SYNTHESIZER UNIT (X14-694x-xx)

Ref. No.
IC1 Cassette mechanism sub-motor IC
IC11 FM diversity IC
IC12 AM noise canceller IC
IC13 2-piece ope-amp
IC14 RDS demodulation IC
IC21 Ope-amp with switch
IC22 Electronic volume
IC23 Ope-amp with switch
IC24 2-piece ope-amp
IC31~34 4-piece ope-amp
IC35 2-piece ope-amp
IC41 Power amp
System µ-com
IC81
IC82 Reset IC
IC83 I2C BUS IC
IC84 2-piece NOR circuit
TE
L 13942296513
IC85 EEPROM
IC86,87 Inverter circuit
Q1,2 Cassette mechanism main motor power supply switch
Q101 Diversity switch
Q102,103 FM power supply switch
Q104,105 AM power supply switch
Q106 IF count detection
Q107 RDS data buffer
Q108 S-meter buffer
Q151,152 Noise amp
Q153 Noise amp
Q202 Mute switch
Q401,402 NAVI mute
Q403 SVR switch
Q404 SVR switch
Q601,602 Audio DC/DC power supply switch
Q604,605 Heater DC/DC power supply switch
www
Q606,607 DC/DC control switch
Q650 Audio DC/DC power supply switch
Q651 Heater DC/DC power supply switch
.
Q801 Buzzer switch
4

COMPONENTS DESCRIPTION

Application / Function
x ao u163
y
i
2 9
8
Operation / Condition / Compatibility
Cassette sub-motor power supply
FM diversity switching (Only for GX-201KEF2)
AM noise canceller
RDS noise amp (Only for GX-201LEF2/REF2)
RDS demodulation (Only for GX-201LEF2/REF2)
CD/Cassette switching
BASS/MID/TRE, MPX, Mute, Electronic volume
Audio/NAVI switching
CD isolation amp, LPF
FIX-EQ
1/2 VCC output
4ch power amp
System control
System reset detection
F-BUS communication
For hard muting
Q Q
3 6 7 1 3 1 5
Bug counter-measure
F-BUS control
For cassette mechanism main motor
When turned ON, turns diversity OFF (Only for GX-201KEF2)
When FM, 8V output
When AM, 8V output
When detecting IF count, Lo output
RDS data buffer output (Only for GX-201LEF2/REF2)
S-meter voltage output
Noise detection constant switching (Only for GX-201LEF2/REF2)
Noise detection output buffer (Only for GX-201LEF2/REF2)
For muting within electronic volume
For NAVI muting at interruption
For SVR discharging
For SVR discharging at over voltage
For DC/DC audio
For DC/DC heater
For switching internal frequency
For DC/DC audio
co
For DC/DC heater
.
For buzzer
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9