Service manual

CX-JT8
2424
J221
R-CH
PHONES
FRONT
SPEAKER
+
–
–
+
R
L
JK503 (1/2)
R-CH
R-CH
–VL
–VP +VP
–VH
OVER LOAD
DETECT
Q505
OUTPUT LEVEL
DETECT
Q23, 24
DC DETECT
Q5, 6
BIAS
Q507, 509
HOLD
Q7 – 9
THERMAL DETECT
Q10, 11
FEED BACK
SWITCH
Q491
+
FINAL DRIVE
Q501, 503
SWITCHING
Q17, 19, 22
SWITCHING
Q18
R-CH
R-CH
+
+
+
TH501,
502
+
R-CH
R-CH
CASCADE
Q511, 513, 515
PRE DRIVE
Q517, 519
MIC AMP
IC401 (1/2)
MIC AMP
IC401 (2/2)
MUTING
Q525
+
CURRENT
MIRROR
Q521, 523
FREQUENCY
CONTROL
Q314 – 316
BASS BOOST
ON/OFF SWITCH
Q323
R-CH
+
+VL
+VH
OUTPUT LEVEL
DETECT
Q20, 21
1
14
6
9
BASS BOOST ENHANCER
IC303 (SUFFIX-11) IC303 (SUFFIX-13)
INPUT SELECTSWITCH, TONE CONTROL,
ELECTRICAL VOLUME, BASS BOOST AMP
IC301 (SUFFIX-11) IC301 (SUFFIX-13)
BASS BOOST CONTROLLER
IC310 (SUFFIX-11) IC310 (SUFFIX-13)
CTRL1 –
CTRL3
INA
VREF
7
BBE
13
GIN
I-BASS
19
SAOUT
SA
MIC
OUTA
29
TOUT
25
OUT2
VR401
J401
3
DATA
4
CLOCK
LCK
S-MUTE O-POWER HOLD
CLK SO
5
LCK
35
RECB-2
12 – 10
BASS BOOST
CONTROL
Q317 – 320
BB CTRL1 –
BB CTRL4
16 – 13
40
CD-L
MD-L
2
MIC
39
TUNER-L
38
TAPE-L
28
VOLIN2
MIC LEVEL
AGC
Q401
–30V
REGULATOR
Q533 – 536
(AC IN)
SUB POWER
TRANSFORMER
PT902
MAIN POWER
TRANSFORMER
PT901
RECT
D2
+VL
TO
POWER AMP
BLOCK
–VL
VL
VL
VF1
TO
FLUORESCENT
INDICATOR TUBE
VF2
RECT
D1
+VH
–VH
–VFL
EVER+10V
VH
VH
RECT
D902 – 905
+4V
REGULATOR
IC501
+3.3V (SUB)
POWER DOWN
RESET
D504
RESET SIGNAL
GENERATOR
IC502
MIC
MIC MIXING
CD-L
A
D402
TUNER-L
J
TAPE-L, REC-L TAPE-L
REC-L
G
DI, SO, CLK,
MCLK, LCK
K
RESET,
POWER DOWN
C
21
DATA
22
CLOCK
D401
MIC, SA
(Page 23)
E
S-MUTE, O-POWER, HOLD
B
: MIC INPUT
(Page 22)
SP-F,
SURR
H
(Page 23)
HP
F
(Page 23)
(Page 22)
(Page 23)
(Page 23)
(Page 23)
(Page 22)
(Except AEP, UK, CIS)
(Chilean, Peruvian)
AEP, UK, CIS,
Australian
AC VOLTAGE
S901
Except AEP, UK,
CIS, Australian
Except
Chilean, Peruvian
VOLTAGE
SELECTOR
RY901
RY902
RESET SWITCH
Q901
R-CH
SURROUND
SPEAKER
+
–
–
+
R
L
JK503 (2/2)
R-CH
FRONT SPEAKER
ON/OFF RELAY DRIVE
Q304
MUTING CONTROL
SWITCH
Q527
POWER OFF
MUTING DRIVER
Q529, 530
D513
VM+10V
FAN MOTOR
ON/OFF SWITCH
Q327, 328, 372, 373
RY501
RY502
SURROUND SPEAKER
ON/OFF RELAY DRIVE
Q532
M731
(FAN)
M
SP-F
SURR
: TAPE PLAY
: REC
: CD PLAY
: TUNER (FM/AM)
SIGNAL PATH
: MD (VIDEO) IN
R-ch is omitted due to same as L-ch.
R-CH
JK302
L
R
MD (VIDEO)
IN
37
BASS BOOST
CONTROL
Q492
R-CH
BUFFER
IC304
CENTER VOLATAGE
GENERATOR
Q324
VM+10V
MCLK DI
+
+4V
HOLD
Q12
OVER CURRENT
DETECT
Q13
IC304 (SUFFIX-11) IC304 (SUFFIX-13)
O-POWER
VM+9V
VM+10V
RECT
D319 – 322
RECT
D301 – 304
VM
VM
VCC
DECK+9V, M+9V
+10V
REGULATOR
IC313
+9V
REGULATOR
IC308
D102
P+7V
D313 – 315
+9V
REGULATOR
IC305
+4V
REGULATOR
IC306
B+ SWITCH
Q301, 302
RELAY B++9V
+1.8V
(MP3)
+3.3V (MAIN)
+1.8V
REGULATOR
IC803
IC313 (SUFFIX-11) IC313 (SUFFIX-13)
IC308 (SUFFIX-11) IC308 (SUFFIX-13)
IC305 (SUFFIX-11) IC305 (SUFFIX-13)
IC306 (SUFFIX-11) IC306 (SUFFIX-13)
POWER ON/OFF
RELAY DRIVE
Q330, 331
6-3. BLOCK DIAGRAM – AMP/POWER SUPPLY Section –