Service manual

CDX-GT65UIW
CDX-GT65UIW
2222
• Waveforms
– MAIN Board –
2.9 Vp-p
3.5 Vp-p
1 V/DIV, 20 ȝsec/DIV
2 V/DIV, 50 nsec/DIV
1 IC501 qa (XOUT)
2 IC501 qd (OSCOUT)
0.05 Vp-p
0.05 V/DIV, 50 nsec/DIV
3 IC001 qh (XTAL1)
30.5 Ps
126 ns
250 ns
• IC Block Diagrams
– MAIN Board –
IC001 TEF6617T/V1/S470, 518
AMRFIN
1
AMRFDEC
2
FMIN2
3
FMIN1
4
LOUT
8
ROUT
9
MPXOUT
13
RSSI
14
XTAL2
15
XTAL1
16
GNDAUD
10
GNDRF
5
VCC+8.5V
6
A
MRFAGC
7
AMIFAGC
11
MPXIN
12
AMOUT2
32
AMOUT1
31
AMIFAGC1
30
AMSELIN2
29
VCOLOOP
25
VCCVCO
24
VREF+4V
20
SDA
19
SCL
18
GNDDIG
17
GNDANA
23
AMSELIN1
28
TESTCT
27
VCOREF
26
VCC+8.5V
22
GREGSUP
21
AM
TUNER
FM
TUNER
OUTPUT
PLL
TUNING
SYSTEM
I2C BUS
POWER
SUPPLY
STEREO DECODER
HIGH CUT
SOFT MUTE
NOISE BLANKER
SIGNAL
IMPROVEMENT
CONTROL
BANDWIDTH
CONTROL
IC301 TDF8556AJ/N5
MUTE
MUTE
ENABLE
LOGIC
STANDBY/
MUTE
CHIP DETECT/
DIAGNOSTIC
PROTECTION/
DIAGNOSTIC
SWITCH
REGULATOR
SWITCH
REFERENCE
VOLTAGE
LOAD DUMP
PROTECTION
TEMPERATURE
PROTECTION
BACK-UP
SWITCH
REGULATOR
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
TAB
OUT-FL–
OUT-FL+
OUT-RL–
OUT-RL+
IN-RL
S-GND
IN-RR
OUT-RR+
OUT-RR–
OUT-FR+
OUT-FR–
DIAG
ANT-REM
AMP-REM
SERVO+3.3V
MECHA+6V
VP
BU+B
I2C_SIO
I2C_SCK
VP2
P-GND1
SVR
IN-FL
IN-FR
BEEP
P-GND3
VP1
STB
P-GND4
RST
CRES
AUDIO+B
(8.5V)
GND
PANEL+B
CBU
FL
RL
RR
VP
FR
I
2
C BUS