Sony HCD-EC68W / MHC-EC68W Service Manual ▷ View online
HCD-EC68W
HCD-EC68W
29
29
7-7. SCHEMATIC DIAGRAM - MAIN Board (2/2) -
• See page 23 for Waveforms. • See page 34 for IC Block Diagrams.
DECK
BOARD
K
PANEL
BOARD
CN304
L
CD
BOARD
CN201
M
MAIN
1
BOARD
(1/2)
21
IC B/D
IC B/D
2.9
1.2
1.4
0
2.9
0
2.2
0
1.7
0
2.3
1.6
2.3
1.8
0
1.8
3.6
3
3.7
2.2
4.2
2.2
4.8
4.8
4.7
4.8
4.7
4.7
2.4
2.2
0.9
2.2
AM FREQUENCY
FM TRACKING
COVERAGE
COVERAGE
FM FREQUENCY
AM TRACKING
FM DETECTOR
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
7.4
3.3
3.3
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
0
8.8
2.9
4.8
6.9
3.4
5.5
0
0.7
0.7
3.8
3.8
0
3.2
7.2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
21P
CN608
AVDD (3.3V)
R-OUT
DACGND
L-OUT
AGND
RST
BUS0
BUS1
BUS2
BUS3
BUCK
CCE
REQ
SBSY
DGND
D-OUT
DVDD (3.3V)
VM (7V)
MGND
CD DRIVE MUTE
ZDET/LRCKIN
1N4002B
D619
1N4002B
D620
10V
220
C669
100
R722
1k
R716
2SC3052F-T1-LF
Q622
22k
R720
16V
100
C667
100
R715
50V
1
C663
50V
1
C664
220
R707
220
R706
50V
10
C661
50V
1
C676
50V
1
C675
1
C658
1
C656
C654
1
C652
1
1
C650
1
C648
C651
220p
2200p
C647
1k
R697
C653
220p
2200p
C657
1k
R709
C635
0.1
C643
0.1
2SC3052
Q617
2SC3052
Q616
R679
4.7k
R680
4.7k
R682
10k
R694
10k
50V
1
1
C644
50V
1
1
C636
50V
1
C646
50V
1
C665
TP637
TP639
TP641
TP642
TP643
TP644
TP645
TP646
TP647
TP648
TP649
TP651
TP652
TP654
TP656
TP657
TP658
TP659
TP660
TP661
TP662
TP663
TP664
TP665
TP666
TP667
TP668
TP669
TP670
TP672
TP673
TP674
TP676
TP677
TP679
TP680
4.7k
R700
4.7k
R704
10k
R696
10k
R708
C649
220p
1
2
3
4
5
6
7
8
9
9P
CN606
9V
PB-Lch
PB-Rch
A-GND
REC-Lch
REC-Rch
M-GND
9V
I-TP-STATE
0.1
C679
0.1
C691
0.1
C693
0.1
C694
2200p
C683
2200p
C690
470p
C689
0.01
C692
2200p
C680
2200p
C682
2200p
C681
100
R732
100
R731
MAZ8039GHLS0
D618
0.047
C638
0.047
C637
0.047
C634
0.047
C633
22k
R684
22k
R681
0.022
C674
5.6k
R751
5.6k
R753
4.7k
R749
4.7k
R750
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
27P
CN607
16V
C671
100
C838
1000p
C827 0.047
C820
5p
C816
0.01
22
R804
TP688
R841
10k
10V
220
C833
R809
100
R824
470
R831 2.2k
R810
4.7k
C822
22
50V
TP684
R811
100k
R823
10k
JW802
R844
2.2k
R845
0
R838
22k
22
R808
R830
3.3k
C815
4700p
R802
22
C837
10p
C824
1
C845
0.22
R819 33k
C817
0.01
R837
100k
C803
1
C847
0.1
R816 1k
C835 0.047
R829 4.7k
6
2
1
3
4
AM IF
T801
R820
4.7k
31
32
33
34
35
36
1
2
3
4
5
6
30
29
28
27
26
8
7
9
10
11
21
22
23
24
25
12
13
14
15
20
19
16
17
18
LV23003VA
IC801
AM RF-IN
REG
FM-MIX
GND1
AM-MIX
VCC1
AM IF-IN
FM IF-IN
P-DET
P-COMP
FM-DET
L-OUT
R-OUT
VSS
CE
DI
CL
DO
XIN
XOUT
VDD
MPX-IN
FM DET-OUT
AM DET-OU
AGC
PD
LP-IN
LP-OUT
BO1
BO2
AM-OSC
FM-OSC
VCC2
FM RF-OUT
GND
FM RF-IN
R827 100k
R840
0
C819
470p
R812
47k
R821
4.7k
C841
1000p
C823
220
10V
R805
470k
16V
100
C802
C830
2p
TP687
1
6
2
3
4
5
L805
C831
0.47
R813
470k
CF
G
I
O
FL801
TP690
1
2
3
4
6
L801
C814
4700p
L803
C832
0.47
R842
0
TP686
L804
C848
0.1
R817
47k
R826
1k
R836
6.8k
C844
0.1
SV230-TB-E
D804
C808
18p
C828
100p
2SC3052F-T1-LF
Q801
R814
22k
R807
22k
R815
10k
R806
47k
R825
4.7k
R832 1M
C840
0.1
JW801
C826
1000p
BPF
G
G
I
O
FL803
C829 0.47
R839
10
C804
18p
CF801
C806
470p
R846
10
1
3
4
6
2
L802
TP689
TP683
TP685
C836 0.022
R818 10k
R843
100k
JW804
C805
0.47
SV230-TB-E
D803
2SC3052F-T1-LF
Q802
C846
0.01
C843
0.1
R801
100
C807
1
R803
2.2k
JW803
C821
2200p
C834
10p
R822
100
R847
0
1
2
3
3P
CN801
AM
GND
FM
X801 75MHz
SVC347A-TL-E
D801
R660 0
68
R717
68
R718
68
R719
KTC3203Y-AT
Q624
C645
1000p
C655
220p
C666
1000p
R683
2.7k
R695
2.7k
1000p
C662
0.1
C850
470p
C713
C809
1000p
C810
1000p
C811
1000p
28
27
26
25
24
23
22
7
6
5
4
3
2
1
21
20
16
17
18
19
13
12
11
10
8
9
15
14
BD3499FV-E2
IC602
TC/DMP-R
TC/DMP-L
TUNER-R
TUNER-L
CD-R
CD-L
AUDIO-R
AUDIO-L
SEL-L
SEL-R
VOL-R
VOL-L
TRE-L
TRE-R
BASSB-L
BASSA-L
BASSA-R
BASSB-R
OUT-L
SB-L
SURR
SB-R
OUT-R
VCC
SCLK
SDATA
GND
FIL
2200p
C640
2200p
C639
R788
15k
R787 15k
470p
C704
0.068
C684
0.068
C686
0.068
C685
0.068
C687
5.6k
R752
5.6k
R754
2200p
C703
0.015
C789
0.015
C788
1PS226-115
D802
1PS226-115
D805
1PS226-115
D806
CD-R
CD-L
AUDIO-L
AUDIO-R
CD-R
CD-L
TU-DO
TUNER-R
TUNER-L
I/O-BUS2
I/O-BUS0
TUNER-R
PB-L
PB-R
REC-L
REC-R
O-CD-M-MUTE
O-CD-BUCK
TU-CE
TU-CLK
TU-ANSD
TU-DO
I2C-DATA
I2C-CLK
5V-ON/TP-REC-MUTE
O-POWER
O-CD-M-MUTE
AMP-ON
O-CD-SBSY
O-CD-REQ
O-CD-CCE
O-CD-BUCK
I/O-BUS2
I/O-BUS0
I-P-MONI
O-CD-ON
TU-ANSD
PB-L
DMP-DET/USB-RST
TU-DI
O-CD-SBSY
O-CD-CCE
I/O-BUS3
I/O-BUS1
O-CD-RST
O-CD-RST
I/O-BUS1
I/O-BUS3
O-CD-REQ
REC-R
REC-L
DMP-DET/USB-RST
TU-CE
TU-DI
TU-CLK
5V-ON/TP-REC-MUTE
O-CD-ON
I2C-DATA
I2C-CLK
AMP-R
AMP-L
TUNER-L
PB-R
CD-AVR
USB5V-ON
VSTBY
1
3
2
MAIN BOARD (2/2)
I/O-I2C-DATA
I-TU-DO
I-TU-ANSD
O-TU-CLK
O-TU-DI
O-TU-CE
V-STBY
D-GND
O-CD-ON
I-P-MONI
O-CD-RST
I/O-BUS3
O-CD-BUCK
I/O-BUS0
O-CD-CCE
I/O-BUS1
O-CD-REQ
O-CD-SBSY
I/O-BUS2
O-AMP-ON
M-GND
O-CD-M-MUTE
I-DMP-DET/O-USB-RST
O-POWER
5V-ON/TP-REC-MUTE
I/O-I2C-CLK
O-SW-ON/I-TP-STATE
Q616, 617
MUTING
INPUT SELECTOR,
IC602
ELECTRICAL VOLUME
AM/FM-DET, OSC,
IC801
MIX, PLL, IF AMP
Q622, 624
+3.3V
REGULATOR
ANTENNA
FM/AM
+3V REGULATOR
+5V REGULATOR
7
11
D
B
6
9
10
F
5
15
L
K
3
G
1
12
C
E
H
8
J
4
13
A
14
2
I
(Page
28)
(Page
25)
(Page
31)
(Page
26)
HCD-EC68W
HCD-EC68W
30
30
IC301
IC302
1
100
30 31
8180
50
51
B E
B E
B E
B E
B
E
B E
B E
B E
B
E
B E
B
E
B
E
B
E
B
E
B
E
B E
R400
R401
R402
R405
R406
R412
R413
R414
R415
R416
R417
R418
R419
R420
R421
R422
R426
R428
R446
R447
Q301
Q303
Q304
Q305
Q306
Q307
Q308
Q310
Q311
Q312
Q313
Q314
Q315
Q316
Q317
Q318
FB301
R301 R302
R303
R304
R305
R306
R307
R308
R309
R310
R312
R313
R314
R315
R316
R317
R318
R319
R320
R321
R321
R322
R323
R324
R325
R326
R327
R328
R329
R330
R331
R332
R333
R334
R335
R336
R337
R338
R339
C301
R340
C304
R341
R342
R343
R344
C308
R345
R346
R347
R348
R349
C310
C311
C312
C313
R350
C314
R351
C315
R352
C316
R353
C317
R354
R355
C319
R356
R357
R358
R359
C320
C321
R360
R361
R362
R363
R364
C328
R365
R366
R367
R368
R369
C330
C332
R370
R371
R372
R373
R374
C338
R375
R376
R377
R378
R379
C340
C341
C342
R380
C344
R381
C345
R382
C346
R383
R384
R385
R386
R387
R389
C354
R390
C355
R391
C356
R392
R396
D301
D302
D303
D304
D305
JR301
JR302
JR303
JR304
JR305
JR307
JR309
JR310
JR311
JR313
JR315
B
E
E
B
1
37
1
2
27
26
1
2
12
13
3
2
1
11
2
1
2
JW370
JW371
JW372
JW373
JW374
JW375
JW376
JW377
JW378
JW379
JW380
JW381
JW382
JW383
JW384
JW385
JW386
JW387
JW388
JW389
JW390
JW391
JW392
JW393
JW394
JW395
JW396
JW398
JW397
JW399
JW400
JW401
JW402
JW403
JW404
JW405
JW406
Q302
Q309
LED301
SW303
SW303
SW304
SW305
TUNING +
W301
3
1
SW311
SW312
SW313
SW314
SW315
SW316
SW317
SW318
SW319
CN304
CN302
CN303
CN306
C302
C303
C305
C306
C309
X301
X302
S301
C343
JW301
JW302
JW303
JW304
JW305
JW306
JW307
JW308
JW309
JW310
JW311
JW312
JW313
JW314
JW315
JW316
JW317
JW318
JW319
JW320
JW321
JW322
JW323
JW324
JW325
JW326
JW328
JW329
JW330
JW331
JW332
JW333
JW334
JW335
JW336
JW337
JW338
JW339
JW340
JW341
JW342
JW343
JW344
JW345
JW346
JW347
JW348
JW349
JW350
JW351
JW352
JW353
JW354
JW355
JW356
JW357
JW358
JW359
JW360
JW361
JW362
JW363
JW364
JW365
JW366
JW367
JW368
JW369
+
–
DSGX
.-
PLAY MODE/
TUNING MODE
FUNCTION
VOLUME
ROTARY
ENCODER
ENCODER
DISPLAY
EQ
-TUNING
/
CD
SW311
LCD301
LIQDID CRYSTAL DISPLAY
9
Y
.-
L
MAIN
BOARD
CN607
B
KEY
POWER
BOARD
W401
STANDBY
1-875-490-
14
(14)
A
KEY CD
BOARD
CD MECHANISM
DECK
A
B
C
D
E
F
G
1
2
3
4
5
6
(CHASSIS)
PANEL BOARD
7-8. PRINTED WIRING BOARD - PANEL Board -
•
: Uses unleaded solder.
• See page 23 for Circuit Boards Location.
(Page 32)
(Page 27)
(Page 32)
Ref. No. Location
• Semiconductor
Location
D301
D-4
D302
D-2
D303
D-3
D304
C-4
D305
E-5
IC301
B-3
IC302
A-5
LED301 A-1
Q301
B-1
Q302
D-4
Q303
D-4
Q304
D-3
Q305
D-2
Q306
D-2
Q307
E-5
Q308
E-5
Q309
E-5
Q310
E-5
Q311
F-5
Q312
F-5
Q313
F-4
Q314
F-4
Q315
F-5
Q316
F-4
Q317
F-4
Q318
F-4
HCD-EC68W
HCD-EC68W
31
31
7-9. SCHEMATIC DIAGRAM - PANEL Board -
• See page 23 for Waveforms. • See page 35 for IC Pin Function Description.
B
A
L
(2/2)
CN607
BOARD
MAIN
BOARD
W401
KEY
POWER
CD
KEY
BOARD
31
32
1.3
3.1
1.3
0
3.3
2.9
3
1.5
3.3
3.3
0.9
3.3
3.3
0
3
2.8
1
3.3
3.3
1.3
3.1
3.1
0
3.3
0
0
3.1
0
0
1
1.4
3.1
0
0
0
0
0
3.3
0
0
3.1
3.1
3.1
3.1
3.1
1.3
1.3
1.3
1.3
1.3
1.3
2.6
0
0
0
3.1
3.1
3.1
0
3.9
0.7
8.1
4.5
0
0
0.7
0.1
5.7
0
3.1
3.3
3.9
7.5
4.9
4.9
4.8
4.8
4.8
4.9
4.9
0
0
0
0
0
5.1
7.1
7.1
8.1
4.9
5.1
7.7
4.9
0
4.8
4.8
4.8
4.8
4.8
4.8
4.8
4.8
4.8
3.1
3.1
0 (1.3) <<3.1>> [0]
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.1
1.3
1.3
1.3
1.3
1.3
1.3
1.3
2SC3052F-T1-LF
Q304
2SC3052F-T1-LF
Q303
R332
10k
C301
0.1
2SC3052F-T1-LF
Q305
Q306
RT1N441C-TP-1
R337
220
R338
2.2
R339
2.2
R340
4.7k
R342 220k
C308
0.1
R343 470k
Q308
RT1N441C
Q310
2SC3052
C309
50V
22
R346
47k
R347
470
R354
47k
R348
47k
R349
470
R350
47k
R351
470
R352
47k
R353
470
R358
47k
R361
47k
R357
47k
R362
22k
R364
22k
R363
22k
R367
22k
R365
22k
C320 22p
C321
0.1
R327
100
R326
100
R325
10
Q301
2SC3052F-T1-LF
R328
10k
R381
10k
C313
0.22
R380
470
R384
10k
R383
10k
R402
100k
C338 1000p
100
R301
R302 100
R303 100
R304 100
R305 100
R306 100
R307 100
R308 100
R309
100
R310 100
R312 100
R313 100
R314 100
R315 100
R316 100
R317 100
R318 100
R319 100
R320 100
R321 100
R322 100
R323 100
C310
0.1
C311
0.1
C312
0.1
C330
0.1
1L0341Y23E0CA602
LED301
Q309
KTA1273
R341
33k
Q317
2SC6053-
T112-1F
Q315
2SC6053-
T112-1F
Q318
2SC6053-
T112-1F
Q316
2SC6053-
T112-1F
Q313
2SA2166-
T112-1W
Q311
2SA2166-
T112-1W
Q314
2SA2166-
T112-1W
Q312
2SA2166-
T112-1W
KTA1271Y-AT
Q302
R334
10k
R331
100k
C302
10
50V
C341
0.1
R345
4.7k
R344
2.7k
R324 100
R333
100k
R336
10k
C305
10
50V
C303
10
50V
C317
1000p
R369
1k
R370
1k
R371
1k
R372
1k
R374
1k
R385
1k
R386
1k
R387
1k
33k
R419
100k
R420
R390
10k
R392
10k
R389
47k
R391
100k
TP301
TP302
TP303
TP304
TP305
TP306
TP307
TP308
TP309
TP310
TP312
TP313
TP314
TP315
TP316
TP317
TP318
TP319
TP320
TP321
TP322
TP323
TP324
TP325
TP326
TP327
TP328
TP329
TP330
TP331
TP333
TP334
TP335
TP336
TP337
TP38
TP339
TP340
TP341
TP343
R329
2.2k
1
2
3
4
5
6
7
8
9
10
11
12
13
13P
CN302
M2-
M2+
M1-
M1+
SW-COM
SW3
SW1
I-CHACK
SW2
I-CLOSE
I-STOCK
I-OPEN
NC
R330
680
R421
10k
50V
C343
22
C314 0.047
C315 0.047
C316 0.047
C328
0.047
MAZ8043GMLS0
D301
R414
2.2k
R376
10k
R377
10k
R379
68k
R382
10k
4.7k
R422
C344
0.047
R335
22k
TP348
R368
10k
R426
100k
R366
10k
R428
47k
1.2k
R405
1.5k
R406
C345
0.047
R375
0
R373
0
1.2k
R412
1.5k
R413
R415
2.7k
R416
3.9k
R417
6.8k
R418
15k
0.047
C346
Q307
ISA1235
C304
0.1
R360
1k
R359
1k
R356
1k
R355
1k
C306
6.3V
470
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
27P
CN304
R400
1k
R401
1k
C332 0.01
R378
33k
MC2836
D303
1
7
8
9 10 11 12
5
6
14
19
18
17
13
16
20
15
23 24
27
21
28
26
25
22
31
33
35
30
32
36
34
29
2
3
4
37
LCD301
4.7k
R446
4.7k
R447
VCC
OUT
GND
NJL24H400A
IC302
1
3
2
MA2J1110GLS0
D305
MA2J1110GLS0
D302
MA2J1110GLS0
D304
FB301
0
C342
1000p
4700p
C354
4700p
C355
C356
0.1
32.768kHz
X301
C319
18p
R396
330k
S301
2
3
1
6MHz
X302
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
MB90803PF-G-135E1
IC301
SEG32
O-AMP-ON
O-POWER
O-CD-ON
I-3CD-SW3/O-CDM-CLOSE
I-3CD-SW2/NC
I-3CD-SW1/O-CDM-OPEN
O-3CD-M1+/O-CDM-M1+
I-RMC
O-3CD-M1-/O-CDM-M1-
O-3CD-M2+/NC
O-3CD-M2-/NC
XOA
X1A
VCC
VSS
I/O-CD-BUS0
I/O-CD-BUS1
I/O-CD-BUS2
I/O-CD-BUS3
I-3CD-CHACK
I-3CD-STOCK
O-DR-MUTE
I-REQ
O-CD-BUCK
O-CD-CCE
O-CD-RST
O-LED-STBY
I-USB-TXD/
I-DMP-TXD
I-USB-DO/
I-DMP-5V-DET
I-USB-TXD/
I-DMP-TXD
I-USB-DO/
I-DMP-5V-DET
O-USB-RXD/
O-DMP-RXD
O-DMP-RXD
AVCC
I-TU-DO
O-USB-DI/5V-ON/O-TP-REC-MUTE
AVSS
I-P-MONI
I-KEY1
I-KEY2
I-TU-ANSD
O-USB-SEL1_2/O-SW-ON/I-TP-STATE
I-KEY-WAKE-UP/VOL
I-HOLD
O-CD-SBSY
GND
I-DMP-DET/O-USB-RST
I-MODEL
I-SUFFIX
I-1CD-CLOSE_OPEN/NC
I/O-I2C-DATA
I/O-I2C-CLK
MD2
MD1
MD0
I-RST
O-TU-CE
O-TU-CLK
O-TU-DI
VLCD
COM0
COM1
CMO2
CMO3
SEG0
SEG1
VCC
VSS
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
VCC
VSS
X1
X0
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
C340
0.1
1
2
CN303
2P
KEY-1
GND
1
2
2P
CN306
1
KEY-0
GND
I/O-BUS0
I/O-BUS1
I/O-BUS2
I/O-BUS3
O-CD-BUCK
O-CD-CCE
I-REQ
O-CD-SBSY
O-AMP-ON
O-DR-MUTE
O-POWER
I/O-I2C-CLK
I/O-I2C-DATA
I-TU-DO
I-TU-ANSD
O-TU-CLK
O-TU-DI
O-TU-CE
I-P-MONI
O-CD-RST
I-SW2
I-CHACK
I-SW1/CDM-OPEN
COM1
COM2
COM3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
O-M2-
O-M2+
O-M1-/CDM-M-
I-HOLD
O-AMP-ON
O-CD-ON
O-M2-
LED-STBY
O-CD-BUCK
O-CD-CCE
M2+
M1-
I-REQ
O-DR-MUTE
SEG32
5V-ON/O-TP-REC-MUTE
SEG32
I-CLOSE/OPEN
I-CLOSE/OPEN
I-STOCK
O-CD-RST
I-RST
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM3
COM2
COM1
COM0
O-TU-CLK
O-TU-CE
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
5V-ON/O-TP-REC-MUTE
O-CD-SBSY
O-CD-ON
O-POWER
COM0
I-STOCK
I-CHACK
I/O-BUS0
I/O-BUS1
I/O-BUS2
I/O-BUS3
I-SW1/CDM-OPEN
O-M2+
I-RMC
I-SW2
LED-STBY
O-M1+/CDM-M+
O-SW-ON/I-TP-STATE
M1+
M1-
I-SW3/CDM-CLOSE
I-KEY-WAKE-UP/VOL
M2-
M1+
I-MODEL
I-SUFIX
I-RMC
I-TU-DO
I-KEY1
I-KEY2
I-TU-ANSD
I-KEY-WAKE-UP/VOL
I-HOLD
I-SUFIX
I-MODEL
I/O-I2C-DATA
I/O-I2C-CLK
I-SW3/CDM-CLOSE
M2+
O-TU-DI
I-RST
I-P-MONI
O-DMP-RXD
O-SW-ON/I-TP-STATE
M2-
I-KEY2
I-KEY1
REMOTE CONTROL
IC302
SW311
SW312
SW313
SW314
SW315
SW316
SW317
SW318
SW319
DISPLAY
PANEL BOARD
SYSTEM CONTROLLER
IC301
LIQUID CRYSTAL DISPLAY
W301
O-TU-CE
O-TU-DI
O-TU-CLK
I-TU-ANSD
I-TU-DO
I/O-I2C-DATA
O-SW-ON/I-TP-STATE
I/O-I2C-CLK
5V-ON/TP-REC-MUTE
O-POWER
I-DMP-DET/O-USB-RST
O-CD-M-MUTE
O-AMP-ON
O-CD-SBSY
O-CD-REQ
O-CD-CCE
O-CD-BUCK
I/O-BUS3
O-CD-RST
I-P-MONI
O-CD-ON
D-GND
V-STBY
M-GND
I/O-BUS2
I/O-BUS1
I/O-BUS0
STANDBY
/
LED DRIVE
Q302-304
+4V REGULATOR
Q305,306
VOLTAGE DETECT
Q311-318
MOTOR DRIVE
(CHASSIS)
REGULATOR
Q307-310
CD
DECK
MECHANISM
RECEIVER
ROTARY ENCODER
VOLUME
-
TUNING +
SW305
FUNCTION
SW304
SW303
- TUNING
DSGX
EQ
PLAY MODE
TUNING MODE
+
CD
7
11
D
B
16
6
9
17
10
F
5
15
L
K
3
G
1
12
C
E
H
8
J
4
13
A
14
2
I
(Page 29)
(Page 33)
(Page 33)
HCD-EC68W
HCD-EC68W
32
32
1
2
SW306
SW307
SW308
SW309
SW310
1
3
SW301
W401
JW491
1
3
JW614
W610
R407
R408
R409
R410
R411
R491
R492
1
9
C491
C495
C496
C698
1
3 2
IC601
1
8
1
3
CN051
CN053
RY002
JW005
JW006
JW007
JW008
JW010
JW011
JW012
JW013
JW014
JW015
JW016
JW017
JW018
JW019
JW020
C051
D051
D052
D055
IC101
B
E
B E
Q101
Q102
R101
R102
R103
R104
R105
R106
R107
R108
R109
R110
R111
R112
R113
R114
R122
R123
R125
R126
R127
R128
R131
R132
R133
R134
R135 R136
C103
C104
C105
R142
C106
R145
C109
R146
C110
C116
C123
C124
C125
C126
C128
D101
D103
JR132
1
15
4
5
1
2
1
5
CN102
CN104
R129
R130
C101
C102
C107
C108
C119
C120
JW131
JW132
JW133
JW134
JW135
JW136
JW137
A
PANEL
BOARD
CN303
1-875-492-
14
(14)
14
(14)
14
(14)
14
(14)
DISC 1
DISC SKIP/
EX-CHANGE
DISC 2
DISC 3
;
D
MAIN
BOARD
B
PANEL
BOARD
CN306
C
MAIN
BOARD
CN605
1-875-489-
1-875-493-
1-875-491-
STANDBY
J492
J491
PHONES
AUDIO IN
(NC)
KEY CD BOARD
JACK BOARD
KEY POWER BOARD
REG BOARD
∗
NOT REPLACEABLE:
BUILD IN TRANSFORMER
BUILD IN TRANSFORMER
∗
PT002
SUB POWER TRANSFORMER
(AC IN)
PT003
MAIN POWER
TRANSFORMER
J
MAIN
BOARD
CN604
1-875-494-
14
(14)
PT BOARD
A
B
C
D
E
F
1
2
3
4
5
6
7
8
9
10
G
H
MAIN
BOARD
CN603
MAIN
BOARD
CN633
1-875-495-
14
(14)
LOW AMP BOARD
7-10. PRINTED WIRING BOARDS - AUDIO IN/OUT, KEY, POWER SUPPLY Section -
•
: Uses unleaded solder.
• See page 23 for Circuit Boards Location.
(Page 30)
(Page 27)
(Page 30)
(Page 27)
(Page 27)
(Page 27)
(Page 27)
Ref. No. Location
• Semiconductor
Location
D051
D-9
D052
D-9
D053
D-9
D101
E-2
D103
E-4
IC101
F-3
IC601
E-5
Q101
E-2
Q102
E-3
Click on the first or last page to see other HCD-EC68W / MHC-EC68W service manuals if exist.