Sony HCD-EC55, HCD-EC77, HCD-GX99 Service Manual
HCD-EC55/EC77/GX99
US Model
HCD-EC55/EC77/GX99
Canadian Model
SERVICE MANUAL
Ver. 1.1 2007.04
SUPPLEMENT-1
Australian Model
Subject: Board changed to suffix -13 from suffix -12.
Parts number of printed wiring board changed to suffix-13 from suffix-12.
It has any difference between suffix-12 and suffix-13.
This supplement-1 describes printed wiring boards, schematic diagrams and
electrical parts list about printed wiring boards suffix-13.
Refer to original service manual (9-887-532-0[]) for other information.
HCD-EC77/GX99
AEP Model
HCD-EC55/EC77
UK Model
HCD-EC55
E Model
HCD-EC55/EC77
HCD-EC55/EC77
• How to distinguish
Location of parts number on changed wiring board
MAIN BOARD
(COMPONENT SIDE)
Before change: 1-872-059-12
After change: 1-872-059-13
REG BOARD
(COMPONENT SIDE)
Before change: 1-872-060-12
After change: 1-872-060-13
PT BOARD
(COMPONENT SIDE)
(COMPONENT SIDE)
Before change: 1-872-063-12
After change: 1-872-063-13
PANEL BOARD
(COMPONENT SIDE)
Before change: 1-872-055-12
After change: 1-872-055-13
KEY-LEFT BOARD
(COMPONENT SIDE)
Before change: 1-872-056-12
After change: 1-872-056-13
KEY-RIGHT BOARD
Before change: 1-872-057-12
After change: 1-872-057-13
HI-AMP BOARD
(COMPONENT SIDE)
LOW-AMP BOARD
(COMPONENT SIDE)
KEY-CD BOARD
(COMPONENT SIDE)
Before change: 1-872-058-12
After change: 1-872-058-13
JACK BOARD
(COMPONENT SIDE)
Before change: 1-872-062-12
After change: 1-872-062-13
Before change: 1-872-064-12
After change: 1-872-064-13
DECK BOARD
(COMPONENT SIDE)
Before change: 1-872-065-12
After change: 1-872-065-13
Before change: 1-872-061-12
After change: 1-872-061-13
9-887-532-81
HCD-EC55/EC77/GX99
B
These are omitted.
CE
Q
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except f or electrolytics and
tantalums.
• All resistors are in Ω and
specified.
• f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note:
The components identified by mark 0 or dotted line with mark 0 are
critical for safety.
Replace only with part
number specified.
• H : adjustment for repair.
• A : B+ Line.
• B : B– Line.
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
– HI-AMP/LOW-AMP Section –
No mark: CD STOP
– DECK Section –
No mark: TAPE PLAY or TAPE REC
– Other Section –
No mark: CD PLAY
• Circled numbers refer to waveforms.
• Signal path.
F : TUNER (FM)
J : TUNER (AM)
f : CD
d : AUDIO
E : PB (TAPE)
a : REC (TAPE)
•Abbreviation
AR : Argentine model
AUS: Australian model
CND : Canadian model
E2 : 120 V AC area in E model
E3 : 240 V AC area in E model
E51 : Chilean and Peruvian models
KR : Korean model
MX : Mexican model
RU : Russian model
SP : Singapore model
1
4
/
W or less unless otherwise
Note:
Les composants identifiés
par une marque 0 sont critiques pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• f : internal component.
•
• Indication of transistor.
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
C
Q
B
E
These are omitted.
•Waveforms
1
IC801 w; (XOUT)
500 mV/DIV, 4
2
13.3 µs
µ
s/DIV
1.5 Vp-p
– PANEL Board –– MAIN Board –
1
IC301 qd (X0A)
500 mV/DIV, 10
30.5 µs
µ
s/DIV
2.1 Vp-p
2
IC301 od (X0)
198 ns
1 V/DIV, 100 ns/DIV
2.5 Vp-p
HCD-EC55/EC77/GX99
PRINTED WIRING BOARDS — MAIN SECTION —
12
A
MAIN BOARD
B
GX99
CN801
ANTENNA
FM/AM
FM
AM
CN801
D806
D805
J601
SUBWOOFER
OUT
C
EC77/GX99
R712
TB601
C603
JW720
EC77/GX99
L601
C605
C606
R631
D
SPEAKER
HIGH FREQ.
IMPEDANCE
Ω
: USE 8
L
R
E
JW751
JW746
JW745
F
G
EC55
SPEAKER
IMPEDANCE
Ω
: USE 6
EC77/GX99
SPEAKER
LOW FREQ.
IMPEDANCE
Ω
: USE 8
TB602
L
R
C609
C610
R615
JW602
JW601
GX99
JW603
JW752
JW757
R711
L603
L604
C618
H
• :Uses unleaded solder.
34567 9
HI-AMP
C
BOARD
SUPPLEMENT-1
(
Page 9
(
8
CN101
DC FAN
R607
C604
1
6
R606
R611
R612
C848
CF801
C616
C615
R710
C617
R647
2
L602
R608
C607
C608
R846
C846
FL803
T801
3
4
JW725
CN602
JW711
JW749
R610
R609
EXCEPT AEP,UK,RU,KR
RY602
JW609
R658
R662
W611
JW743
C847
JW729
JW728
R832
JR602
E
Q803
JW604
D804
L804
JW739
JW726
R853
JW727
JW608
JW605
R842
RY601
JW744
R850
R851
C685
CN603
R847
4
3
JW742
JW741
R838
D801
R843
C836
L801
C835
C841
1
6
JW737
JW738
C844
R844
R845
C845
JR601
C843
R852
FL802
FL801
C849
R849
JW723
R848
JW755
C684
EC55:
C670
EXCEPT AEP,UK,RU,KR
JW712
R633
R632
D601
JW618
C698
R639
R640
JW607
JW606
R660
R663
L805
5
2
2
JW722
JW719
JW709
JW710
R635
6
1
C837
R837
C834
C819
3
4
JW724
JW713
D603
R636
C699
C700
C820
R839
IC801
JW730
C830
C833
LP001
JW717
EC77/GX99
D604
EC77
R661
R664
R826
R827
JW736
R829
JW801
R830
JW803
JW740
D803
C826
JW735
C829
R642
E
R634
R638
R641
D802
JW802
C832
JW718
R643
Q604
R841
JW804
C831
Q603
JW708
EC55
C840
C828
R819
R818
R817
C807
R836
JW707
R831
C838
L803
R840
C824
R823
C806
C827
C821
C805
C822
X801
C817
JW721
C816
1
2
6
L802
C614
R630
R629
E
JW714
EC77:US,CND/GX99
R645
D605
R644
R727
R728
JW706
C626
EC77/GX99
JW610
R801
R806
R822
C823
R825
C808
R815
C815
3
4
R604
JW715
R648
R650
C678
JW611
R824
C804
C602
JW716
C696
JW704
JW705
JW612
JW731
C814
R651
R814
R605
Q606
R649
JW613
R803
Q801
R805
R816
R820
R821
CN601
E
R652
R614
C803
R811
R812
EC55
E
C809
R603
C620
R813
JW732
C811
C601
R646
C622
R809
JW748
Q605
D602
R613
D606
R810
R807
JW733
JW734
C810
E
D610
D608
EC77/GX99
R808
C802
Q802
E
EXCEPT
AEP,UK,RU,KR
C686
JW698
Q601
R626
D622
R601
C613
C695
R621
C612
R618
R619
R617
R616
C611
R620
C677
E
R627
D621
JW690
R726
JW703
R624
R625
R623
JW614
R804
JW696
JW697
C850
Q602
R622
JW615
JW689
JW699
R725
E
JW700
D609
D607
JW633
R802
C663
C664
JW691
R724
JW702
C623
C621
C628
C627
JW685
EXCEPT
R715
AEP,UK,RU,KR
JW756
JW686
C688
JW687
JW688
C665
C667
C666
R709
R708
C656
C658
C655
JW693
JW694
R704
JW750
R667
R666
D614
E
Q608
JW701
C630
C668
EC55:
EXCEPT AEP,UK,RU,KR
CN604
JW634
C642
Q619
R692
R691
R693
D617
JW628
D615
EXCEPT
AEP,UK,RU,KR
C662
C650
C649
JW692
R700
JW747
R686
JW631
R729
E
C632
R685
JW616
W609
C648
JW695
JW668
JW667
JW666
D612
R677
C687
IC602
R687
R676
C661
C659
R697
JW665
C641
R689
Q618
E
R678
D616
JW617
C660
C646
D611
C645
JW629
C643
R694
R696
EXCEPT
JW654
R688
FB601
R707
R706
C640
R695
JW657
JW656
JW655
JW630
C639
R684
C636
C644
Q616
US,CND
R655
JW632
JW619
EC77/GX99
C638
C704
C654
C652
C702
C634
JW684
C701
C633
E
Q617
R683
R679
C631
C703
E
JW664
JW660
W612
C637
C635
JW672
JW659
JW658
JW648
JW625
JW624
JW623
JW622
JW620
R680
C676
C675
JW627
JW626
JW621
EXCEPT
US,CND
R682
JW669
JW653
JW683
C653
C651
R681
JW673
JW670
JW663
JW678
JW677
JW676
JW675
JW674
JW662
JR603
D623
JW661
C680
JW645
US,CND
JW671
C694
JW635
JW681
JW682
JW680
JW679
R702
R701
CN606
CN607
CN608
C689
JR604
C682
JW646
R718
R717
JW642
JW641
JW640
R674
R668
JW636
1-872-059-
JW652
JW651
C691
R719
R671
R675
C693
C692
C690
C683
C681
C679
JW650
JW649
JW644
JW643
(13)
JW754
JW753
C673
E
Q624
JW637
13
JW638
JW647
C671
CN605
B
SUPPLEMENT-1
(
Page 13
D620
D619
R716
R722
Q622
D618
C669
JW639
REG
BOARD
EXCEPT
DECK BOARD
FFC502
R720
E
1
3
2
US,CND
(
10
(
I
PANEL BOARD
CN301
SUPPLEMENT-1
(
Page 6
A
BD90 BOARD
CN201
(Page 33)
EXCEPT EC55 : US,CND
E
PT BOARD
CN051
EC55 : US,CND
K
PT(U) BOARD
(Page 47)
CN051
J
JACK BOARD
FFC404
SUPPLEMENT-1
Page 13
C629
13
W610
IC601
1-872-060-
(13)
11
• Semiconductor
Location
Ref. No.
D601 E-3
D602 E-5
D603 E-3
D604 F-4
D605 E-4
D606 E-5
D607 F-5
D608 E-5
D609 F-5
D610 E-5
D611 F-6
D612 E-6
D614 D-6
D615 G-6
D616 C-7
D617 C-7
D618 E-8
D619 E-8
D620 E-8
D621 D-5
D622 D-5
(
D623 C-7
D801 B-3
D802 B-4
D803 B-4
D804 B-3
D805 B-2
D806 B-2
IC601 H-9
IC602 B-6
IC801 C-4
Q601 D-5
Q602 D-5
Q603 D-4
SUPPLEMENT-1
(
Page 14
(
Q604 E-4
Q605 E-5
Q606 E-5
Q608 E-6
Q618 F-6
Q619 F-6
Q622 F-8
Q624 E-8
Q801 B-5
Q802 B-5
Q803 D-3
Location
(
I
HCD-EC55/EC77/GX99
D
EC77/GX99
LOW-AMP BOARD
CN101
SUPPLEMENT-1
(
Page 11
L
EC55
HI-AMP BOARD
CN101
SUPPLEMENT-1
(
(
Page 9
(
33
HCD-EC55/EC77/GX99
SCHEMATIC DIAGRAM — MAIN SECTION (1/2) —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
A
RY601
D622
0
*
(1/2)
9.2 16.9
KTA1266GR-AT
5.3
2SC3052F-T1-LF
MAIN BOARD
B
DC
FAN
C
D
E
EC77/GX99
C
HI-AMP BOARD
CN101
SUPPLEMENT-1
(
Page 10
PROTECT
(
VDD+
GND
VDD+
IN-R
A-GND
AMP-ON
PA-GND
OUT-R
OUT-L
IN-L
+VH
-VH
TP601
1
2
3
CN601
3P
EC77 :
US,CND/GX99
R605
15
TP603
10
TP604
9
TP605
8
TP606
7
TP607
6
TP608
5
TP609
4
TP610
3
TP611
2
TP612
1
CN602
10P
C601
47
25V
TP602
D622
*
EC55/EC77 :
UDZW-TE17-8.2B
GX99 : MAZ8082GMLS0
R603
*
4.7 EC77 : US,CND/GX99
5.6 EXCEPT EC77 : US,CND/GX99
R604
100k
R603
C602
22
*
50V
F
C604
R606
TB601
G
SPEAKER
HIGH FREQ.
IMPEDANCE
: USE 8
H
1
MAIN
BOARD
I
(2/2)
SUPPLEMENT-1
(
Page 5
+
L
-
-
R
Ω
+
1
2
3
4
5
6
7
8
(
10
4P
TP613
L601
C603
0.01
0.01
C606
R608
10
TP614
L602
C605
R607
0.1
0.1
R631
10
• See page 2 for Waveform.
R724,R725,R726
*
15 EC77 : US,CND/GX99
22 EXCEPT EC77 : US,CND/GX99
Q601
FAN POWER
Q603
FAN MONITOR
D603
MA111-TX
R632
100k
R633
100k
C615
0.1
C616
0.1
10
R601
R626
16.2
470
R726
*
10k
R627
4.7k
*
Q602
2SC3052F-T1-LF
FAN CONTROLLER
0.7
C613
10
50V
D621
R63447R636
R724R725
*
R629
4.7k
C614
*
R635
47
AM FREQUENCY
COVERAGE
R825
4.7k
1
R823
10k
R829
4.7k
PD
FM-DET
R836
L802
2
0
LP-IN
P-COMP
6.8k
C828
R830
100p
3.3k
C831
0.47
1
6
4
6
9
JW804
12.5
LP-OUT
P-DET
C829
0.47
JW803
5.5
L801
TP687
BO1
FM IF-IN
8791011
C830
3
2
1
R826
1k
R827
100k
C826
1000p
C838
1PS226-115
3
5
3029282726
BO2
2.2
2p
CF801
C819
470p
D802
2
TP688
R831
2.2k
AM IF-IN
AM IFT
C820 5p
D803
SVC230-TB-E
1000p
1
R839
10
5
5
31 32 33 34 35 36
AM-OSC
VCC1
5
5
R8321M
C843 0.1
C833
220
10V
JW750
5.5
D621
*
UDZW-TE17-4.3B
EC55/EC77 :
GX99 : MAZ8043GMLS0
FAN
PROTECT
4.7
47k
R630
50V
AMP-R
A-GND
AMP-L
AMP-STBY
R806
C803
47k
1
R805
470k
47
R802
R803
R807
22
2.2k
22k
R801
100
R811
100k
R80422R808
22
R810
TU-ANSD
Q801
2SC3052F-T1-LF
+3V REG
9
R812
47k
Q802
2SC3052F-T1-LF
+5V REG
7.835
4.7k
TU-DO
TU-CLK
TU-DI
TU-CE
TUNER-R
TUNER-L
5.7
R809
100
C802
100
16V
3.6
R813
470k
C807
1
R815
R816
C814,C815
4700P : EXCEPT US,CND
0.01 : US,CND
R820
4.7k
R821
4.7k
18p
C804
X801
75kHz
C808
18p
10k
31.3
1k
R814
22k
JW801
15
R817
R818
47k
10k
1.532.201.200
21 22 23 24 25
2019
XIN
VDD
XOUT
1
DI
CL
DO
161718
0
0
0
C811 100p
C810 100p
C809 100p
0.01
***
C816
C815
C814
C805
0.47
R819
33k
MPX-IN
CE
0.01
C817
TP686
R822
R824
100
C823
220
10V
JW802
7.5
C806
470p
C821
2200p
C822
C827
22
0.047
50V
AGC
AM DET-OU
FM DET-OUT
VSS
L-OUT
R-OUT
12131415
2.3
2.353.742.2
C832
470
C824
0.47
3
4
FM DETECTOR
C834 10p
3
TP689
FM
FREQUENCY
COVERAGE
L803
5
FM-OSC
AM-MIX
4
6
SVC347A-TL-E
R837
100k
2
1
C844
0.1
5
VCC2
GND1
2.5
C845 0.22
FL801
0.01
T801
D801
R841
10k
C840
0.1
R840
0
FM RF-OUT
FM-MIX
2.2
3
2
1
REG
C835
0.047
GND
C848
R842
1000p
0.1
0
C841
R843
100k
0
123456
2.2
C836
0.022
FM RF-IN
AM RF-IN
Q803
2SC5477
-T122-1
IF-AMP
R838
22k
SVC230-TB-E
3
TP690
L804
FM TRACKING
R844
IC801
LV23003VA
AM/FM DET.OSC
MIX.PLL.IFAMP
R847 0
R848
100
R849
220
R850
100
3.3
0.1
R851
22
D804
3
C837
10p
1
2
C847
0.1
R846
10
C846
0.01
2.2k
C849
0.01
R852
2.2K
0.8
R853
680
D805
1PS226-115
D806
1PS226-115
FL803
BPF
G
4
IO
FL802
O
G
5
CF
No mark : CD PLAY
220uH
AM TRACKING
6
SW-OUT
PB-L
PB-R
REC-L
REC-R
R655 0
TU-CE
TU-DI
TU-CLK
TU-ANSD
TU-DO
O-FUNC-DATA
O-FUNC-CLK
TP-REC-MUTE
O-POWER
I
I-P-MONI
O-CD-ON
I-CD-ZDET
O-CD-M-MUTE
O-CD-SBSY
O-CD-REQ
O-CD-CCE
O-CD-BUCK
I/O-BUS3
I/O-BUS2
I/O-BUS1
I/O-BUS0
O-CD-RST
C679
0.1
C681
2200p
CN801
PLUG CONNECTOR (2.5MM)
TP681
TP682
TP672
TP656
C683
C690
C692
2200p
2200p
0.01
3P
TP683
TP684
TP685
J601
JACK,PIN1P
CN606
TP673
TP674
TP675
TP676
TP677
TP678
TP679
TP680
CN607
TP657
TP658
TP659
TP660
TP661
TP662
TP663
TP664
TP665
TP666
TP667
TP668
TP669
TP670
TP671
9P
1
2
3
1
2
3
4
5
6
7
8
9
27P
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
AM
GND
FM
SUBWOOFER
9V
PB-Lch
PB-Rch
A-GND
REC-Lch
REC-Rch
M-GND
9V
I-TP-STATE
O-TU-CE
O-TU-DI
O-TU-CLK
I-TU-ANSD
I-TU-DO
O-FUNC-DATA
I-TP-STATE
O-FUNC-CLK
O-TP-REC-MUTE
O-POWER
I-CD-ZDET
O-CD-M-MUTE
O-AMP-ON
O-CD-SBSY
O-CD-REQ
O-CD-CCE
O-CD-BUCK
I/O-BUS3
I/O-BUS2
I/O-BUS1
I/O-BUS0
O-CD-RST
I-P-MONI
O-CD-ON
D-GND
V-STBY
M-GND
OUT
ANTENNA
FM/AM
GX99
EXCEPT US,CND
DECK BOARD
FFC502
SUPPLEMENT-1
(
Page 13
PANEL BOARD
SUPPLEMENT-1
(
Page 7
B
(
I
CN301
(
L805
1
2
J
HCD-EC55/EC77/GX99
12
10 11
MAIN BOARD (2/2)
2
SUPPLEMENT-1
(
Page 5
1314 15 16 17 18
9
(
44
SCHEMATIC DIAGRAM — MAIN SECTION (2/2) —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
A
MAIN BOARD (1/2)
SUPPLEMENT-1
1
(
Page 4
(
MAIN BOARD (1/2)
SUPPLEMENT-1
2
(
Page 4
(
1234 5 6 7 8 910 11 121314 15 16 17 18
HCD-EC55/EC77/GX99
B
EC77/GX99
C
LOW-AMP BOARD
SUPPLEMENT-1
(
Page 12
D
HI-AMP BOARD
SUPPLEMENT-1
(
Page 10
E
F
G
H
EC55 : US
PT (U) BOARD
I
CN051
(Page 47)
EXCEPT
EC55 : US
J
PT BOARD
CN051
SUPPLEMENT-1
(
Page 14
D
CN101
L
EC55
CN101
EC55
SPEAKER
IMPEDANCE :
USE 6
K
E
Ω
(
(
EC77/GX99
SPEAKER
LOW FREQ.
IMPEDANCE :
USE 8
(
Ω
RELAY ON/OFF
AC DETECT
A-GND
AMP-ON
PROTECT
PA-GND
OUT-R
OUT-L
V STBY
VH(AC)
VL(AC)
VL(AC)
VH(AC)
IN-R
IN-L
+VH
-VH
+
L
-
-
R
+
GND
MAIN BOARD
TP615
TP616
TP617
TP618
TP619
TP620
TP621
TP622
TP623
TP624
MC2838-T112-1
10R611
R619
C609
C610
TP627
TP628
TP629
AEP,UK,RU,KR
D601
4.7k
4.7k
R610
R609
10R612
1uHL603
0.01
0.01
CN603
10P
10
9
8
7
6
5
4
3
2
1
TB602
TP625
TP626
R616,
*
3.9K : EC55
10K : EC77: E51,E2,E3,MX,AR.AUS
15K : EC77 : US,CND/GX99
8.2K : EC77 : AEP,RU
CN604
8P
1
2
3
4
5
6
7
8
C698
1000p
R638
47
Q604
SP RELAY
DRIVER
0.7
D605
EXCEPT EC55
FB601
0uH
R641
47
R645
*
R643
4.7k
C696
1
C611 0.22
R620 4.7k
C612 0.22
R621 4.7k
C677
3300
63V
C678
3300
A-GND
AMP-R
A-GND
AMP-L
AMP-STBY
AMP-STBY
OUT-R
OUT-L
FAN
R642
47
SP-RELAY
R644
1k
GX99
R710
33k
R711
33k
5.35.3
0
63V
C627
C628
1000
2200
25V
25V
SW-OUT
R712
PROTECT
OUT-R
820
OUT-L
(CHASSIS)
2.2
O-POWER
TP-REC-MUTE
R658
100
1/2W
R662
100
1/2W
W612
Q608
2SC3052F-T1-LF
AMP CONTROLLER
17
2.8
EC55:EXCEPT
AEP,UK,RU,KR
C670
100p
C686
*
10p : EC55:EXCEPT AEP,UK,RU,KR
22p : EC77:EXCEPT AEP,RU
No Mount AEP,UK,RU,KR
C685
*
10p : AEP,UK,RU,KR
22p : EC77:EXCEPT AEP,RU/GX99
470p : EC55:EXCEPT AEP,UK,RU,KR
R660
R661
100
100
1/2W
1/2W
R663
R664
100
100
1/2W
1/2W
1
IN
2
GND
3
OUT
C668
0.1
W609
3P
EXCEPT US,CND
R679
R680
R668
100
1/2W
R674
R675
R671
100
1/2W
1N4002BD615
16V100
C631
D614
MA111-TX
R667
47k
R666
1k
C630
47
10V
C684
*
47
47
HP-R
HP-L
4.7k
4.7k
C685
*
C684
*
470p : EC55:EXCEPT AEP,UK,RU,KR
Q616
2SC3052F-T1-LF
REC MUTE-L
0
C686
*
C687
C688
EC77/GX99
C703
D616
MA111-TX
R676
10k
R677
10k
10p : AEP,UK,RU,KR
22p : EC77:EXCEPT AEP,RU/GX99
0
Q617
2SC3052F-T1-LF
REC MUTE-R
0
EXCEPT
1000p
AEP,UK,RU,KR
1000p
0.01
C701
EC77/GX99
14
15
C638
EC77/GX99
3.9 3.9
0.068
R684
C637
0.068
8.2k
5.6
5.6
R729
100k
C633
3.9
13 12 11 1089
BASS-R
BASS-LBASS-L
NC
1PS226-115
0.01
C704
CD-AVR
R687
220k
2SA1235TP-1EF
CD MONITOR
1.9
56k
R686
8.2kR681
0.01
R678
47k
C632
4.7
50V
*
IN
1
GND
2
OUT
3
W610
3P
REG BOARD
0
C634
0.068
0.01
0.068
C702
3.9
3.9
BASS-R
NC
3.9
C639
4700p
D623
I-P-
Q618
R688
10k
C641
*
C641
2.2/50V EXCEPT AEP,UK,RU
3.3/50V AEP,UK,RU
C629
0.1 25V
EC77/GX99
C636
1
50V
VOL-R
TRE-L
C640
MONI
R690
2.2k
R689
27k
17
9
REC-R
10kR682
1
C635
3.9
OUT-R
TRE-R
3.9
C659
220p
4700p
C660
220p
R685
47k
2SC3052F-T1-LF
POWER RELAY
DRIVE
1
3
2
2.7kR683
1
50V
C644
3.9
VOL-L
D-GND
Q619
REC-L
CD-L
10kR694
2.7kR695
1
C643
C646
1
50V
3.9
3.9
76
OUT-L
CLK
2120161718 19
3.9
3.9
C661
220
R706
O-FUNC-CLK
O-FUNC-DATA
PROTECT
0
IC601
TA7809S
+9V REG
No mark : CD PLAY
1k
R697
R700
10kR696
TUNER-L
220p
C645
1
C648
3.9
CD-L
TUNER-L
REF
DATA
3.9
10
50V
220
R707
D617
MC2838-T112-1
0.7
R691
10k
4.7k
AUDIO-L
220p
C649
1
C650
3.9
5
7.8
C642
0.022
US,CND
AUDIO-L
VCC
C662
0.1
R692
*
PB-L
R701 0
100p
C651
1
3.9
4
25242322
TAPE-L
A-GND
R732
O-POWER
PB-R
AUDIO-R
TUNER-R
4.7k
R704
0
R702
100p
220p
C655
C653
EXCEPT US,CND
1C658
1C656
C6541C652
3.9
3.9
3.9
1
2
3
TAPE-R
AUDIO-R
L-OUT
R-OUT
28
2726
3.9
3.9
3.9
50V1
50V1
C664
C663
R731
*
*
AMP-L
AMP-R
R732
R731,
*
0 EXCEPT AEP,UK,RU,KR
100 AEP,UK,RU,KR
2.2k
R693
R692
*
4.7k:EXCEPT US,CND,AEP,UK,RU
10k:US,CND,AEP,UK,RU
(CHASSIS)
CD-R
TUNER-R
CD-R
C665
1
50V
W611
C850
0.1
1kR709
10k
R708
220p
C666
C667
100
16V
A-GND
100
R715
IC602
R2S15904SP
AUDIO SELECTOR
TONE CONTROLLER
Q622
2SC3052F-T1-LF
CD POWER
SWITCH
R717
R718
1kR716
R719
3.9
0
R720
22k
O-CD-ON
D618
*
EC55/EC77:UDZW-TE17-3.9B
GX99:MAZ8039GHLS0
O-CD-RST
I/O-BUS0
I/O-BUS1
I/O-BUS2
I/O-BUS3
O-CD-BUCK
O-CD-CCE
O-CD-REQ
O-CD-SBSY
C693
O-CD-M-MUTE
I-CD-ZDET
TP630
C675
50V1
C676
50V1
C689
470p
C691
0.1
0.1
TP631
TP632
TP633
TP634
TP635
CD-R
3.36.2
C671
100
10V
D618
*
D620
1N4002B
CD-L
C673
470
10V
Q624
KTC3203Y-AT
+3.3V REG
68
68
68
CD-AVR
220
10V
C669
D619
1N4002B
3.9
R722
100
C680
C682
2200p
2200p
C694
0.1
AUDIO-L
AUDIO-R
HP-L
HP-R
AMP-ON
No mark : CD PLAY
TP636
TP637
TP638
TP639
TP640
TP641
TP642
TP643
TP644
TP645
TP646
TP647
TP648
TP649
TP650
TP651
TP652
TP653
TP654
TP655
AVDD
1
R-OUT
2
DAC-GND
3
L-OUT
4
A-GND
5
RST
6
BUS0
7
BUS1
8
BUS2
9
BUS3
10
BUCK
11
CCE
12
REQ
13
SBSY
14
D-GND
15
D-OUT
16
DVDD
17
VM7V
18
M-GND
19
M-MUTE
20
ZDET
21
CN608
21P
AUDIO-L
1
A-GND
2
AUDIO-R
3
HP-GND
4
HP-L
5
HP-R
6
AMP-ON
7
SP-RELAY
8
GND
9
CN605
9P
A
BD90 BOARD
CN201
(Page 34)
J
JACK BOARD
FFC404
SUPPLEMENT-1
(
Page 13
(
(2/2)
C699C700
1000P1000P
RY602
Relay
0.1
C607
1uH
L604
R622
R623
0.1
C608
10
R615
R648
47k
C620
100
10V
R614
10k
R613
10k
R616
33k
*
10k
10k
R617
R624 10k
R625
33k
D604
MA111-TX
R640
100k
R639
100k
0.1
C617
0.1
C618
10
R647
R650
4.7k
R651
4.7k
R649
2.2k
Q605
2SC3052F-T1-LF
R646
100
C695
1
MC2838-T112-1
R618
10k
R619
*
C621
0.1
100V
C623
0.1
100V
R727
4.7k
R728
4.7k
0
D602
D607
1N5402-F46
D608
1N5402-F46
D609
1N5402-F46
D610
1N5402-F46
PROTECT
1.3
R645
*
2.2k EC77:MX
4.7k EC55/EC77:EXCEPT MX/GX99
EC55
C622
2200
50V
C626
2200
50V
D611
1N4002B
D612
1N4002B
EXCEPT AEP,UK,RU,KR
2SC3052F-T1-LF
MA111-TX
Q606
2SC3052F-T1-LF
Q605,Q606
AC MONITOR
R652
100
D606
MC2836
HCD-EC55/EC77/GX99
55
HCD-EC55/EC77/GX99
PRINTED WIRING BOARD — PANEL SECTION —
12
A
B
C
D
E
(
H
KEY-RIGHT
BOARD
CN403
SUPPLEMENT-1
Page 8
F
• :Uses unleaded solder.
PANEL BOARD
Q301
E
R328
JW378
JW350
R327
R326
R325
C314
C315
C316
FUNCTION
R384
R383
SW313
R354
EEE
2
Q315
W306
1
Q311
R347
R310
R313
R308
R306
R387
JW370
R355
Q316
R346
(BACK LIGHT)
(
LED301
JW362
JW392
JW358
JW308
JW314
TUNING +
M
L
SW303
R386
JW353
R357
R356
JW335
EE
Q312
R348
R349
345678
KEY-LEFT
F
BOARD
CN401
SUPPLEMENT-1
R321
JR315
JW323
JW321
R358
Q317
JW390
E
Q313
R351
JW384
R359
E
JW348
R353
R350
JW311
R320
R319
JW375
JW339
R360
R361
Q318
E
Q314
R352
JW332
C317
JW387
JW372
R372
R365
JR321
R318
JR308
JW382
R413
R370
R363
JW377
JW359
C328
JW373
R374
R367
JW352
R366
R368
R362
R364
JW388
X301
C325
C326
C327
R371
R369
JW310
JW324
X302
C320
JW325
JW342
JW302
JW391
R375
R373
R405
JR302
R412
VOLUME
(LIQUID CRYSTAL DISPLAY)
LCD301
C342
C321
S301
R406
JW345
SW311
JW395
C306
JW301
x
JW369
JW379
R317
JW351
C307
JW337
Q306
R316
C319
R396
TUNER/BAND
SW305
R322
R397
JW322
R336
R337
E
JW397
JW355
IC301
C330
JR305
JR316
R312
JW366
JW328
JW365
JW303
JW356
D303
C304
D302
JW312
C305
C303
R334
E
JW394
JR320
JW331
JW315
R333
Q304
R335
Q305
JW307
C341
US,CND
R309
R305
R420
D304
JR309
JR318
JW333
TUNING –
l m
Q303
R332
D301
E
C309
C310
Q310
C343
R419
R311
JW385
E
JW386
R330
Q308
JW364
R304
R388
JW393
C332
JR310
SW304
JW341
SW312
Q302
E
R421
R401
JW338
R323
R331
R329
E
R402
R400
EXCEPT AEP,UK
JW306
JW357
CD u
JW327
E
C302
Q309
D305
R345
R341
JW381
JW326
JR313
EXCEPT
R392
JR311
R307
JW367
R315
JW346
Q307
R380
JW374
R301
C340
EC55 US
R389
JW336
JW304
C301
E
R343
C308
W304
R382
JW371
R381
C313
R302
R303
JW376
R390
JR301
JW380
JW329
R314
JR304
JR307
JW319
JW313
JW360
JW383
R342
R338
R339
R344
R340
1-872-055-
R385
JW361
13
JW330
R393
EXCEPT US,CND
JW309
JW318
JW334
JW363
JW316
JR314
IC302
JR317
JW354
JR312
R324
R399
JW340
JR303
CN301
JR306
JR319
JW305
JW389
JW368
(
I
SUPPLEMENT-1
(
13
(13)
Page 8
MAIN BOARD
CN607
Page 3
(
(
• Semiconductor
Location
Ref. No.
D301 E-5
D302 F-4
D303 E-4
D304 C-5
D305 E-5
LED301 B-2
IC301 B-4
IC302 B-6
Q301 B-2
Q302 D-5
Q303 D-5
Q304 E-5
Q305 E-5
Q306 F-4
Q307 E-5
Q308 F-5
Q309 E-5
Q310 E-5
Q311 E-2
Q312 E-3
Q313 E-3
Q314 E-3
Q315 E-2
Q316 E-3
Q317 E-3
Q318 E-3
Location
HCD-EC55/EC77/GX99
G
H
CD MECHANISM
DECK
CN302
C312
JW343
JW349
C311
R377
R379
R378
W305
R376
JW320
KEY-CD
G
BOARD
W402
SUPPLEMENT-1
(
Page 8
(
66
HCD-EC55/EC77/GX99
SCHEMATIC DIAGRAM — PANEL SECTION —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
A
PANEL BOARD
TP301
100R301
B
C
D
E
F
G
H
I
J
K
L
I
MAIN BOARD(1/2)
CN607
SUPPLEMENT-1
(
Page 4
CD MECHANISM
DECK
KEY-LEFT
BOARD
CN401
SUPPLEMENT-1
(
Page 8
KEY-CD
BOARD
W402
SUPPLEMENT-1
(
Page 8
KEY-RIGHT
BOARD
CN403
SUPPLEMENT-1
(
Page 8
O-TU-CE
27
TP302
O-TU-DI
26
I-TU-DO
I/O-BUS3
I/O-BUS2
I/O-BUS1
I/O-BUS0
I-P-MONI
O-CD-ON
D-GND
V-STBY
M-GND
CN301
27P
CN302
13P
SW-COM
KEY-0
AVCC
KEY-1
KEY-2
M2-
M2+
M1-
M1+
SW3
SW1
SW7
SW2
SW6
SW5
SW8
GND
GND
GND
NC
TP303
25
TP304
24
TP305
23
TP306
22
TP307
21
TP308
20
TP309
19
TP310
18
TP311
17
TP312
16
TP313
15
TP314
14
TP315
13
TP316
12
TP317
11
TP318
10
TP319
9
TP320
8
TP321
7
TP322
6
TP323
5
TP324
4
TP325
3
TP326
2
TP327
1
Q307
2SA1235TP-1EF
Q307~Q310
CD MOTOR
CONTROLLER
TP328
1
TP329
2
TP330
3
TP331
4
TP332
5
TP333
6
TP334
7
TP335
8
TP336
9
TP337
10
TP38
11
TP339
12
TP340
13
TP341
1
2
3
TP342
4
TP343
1
2
TP344
1
2
O-TU-CLK
I-TU-ANSD
O-FUNC-DATA
I-TP-STATE
O-FUNC-CLK
O-TP-REC-MUTE
O-POWER
I-CD-ZDET
O-CD-M-MUTE
O-AMP-ON
O-CD-SBSY
O-CD-REQ
O-CD-CCE
(
O-CD-BUCK
O-CD-RST
W304 4P
F
(
STBY-LED
W305 2P
G
(
W306 2P
H
(
R302 100
R303 100
R304 100
R305 100
R306 100
R307 100
R308 100
R309 100
R310 100
R311 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
R324 100
C311
C312
SW305
TUNER/BAND
SW313
TUNING +
M
I-TU-ANSD
O-FUNC-DATA
I-TP-STATE
O-FUNC-CLK
O-TP-REC-MUTE
I-CD-ZDET
O-CD-M-MUTE
O-AMP-ON
O-CD-SBSY
O-CD-BUCK
R338
2.2
R339
2.2
R344
2.7k
C308
R340
0.1
4.7k
7.3
R341
33k
0
0
Q308
RT1N441C-TP-1
M2-
0.1
M2+
M1-
0.1
M1+
R406
2.2k
L
R413
2.2k
O-TU-CE
O-TU-DI
O-TU-CLK
I-TU-DO
O-POWER
O-CD-REQ
O-CD-CCE
I/O-BUS3
I/O-BUS2
I/O-BUS1
I/O-BUS0
O-CD-RST
I-P-MONI
O-CD-ON
7.3
R362 22k
SW304
CD u
SW312
TUNING –
L
KTA1273-Y-AT
R342
220k
R343
470k
5.3
R363 22k
M
R405
1k
R412
1k
• See page 2 for Waveforms.
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
25
R329
2.2k
D301
C302
10
50V
R330
680
2SC3052F-T1-LF
Q311
2SA1365-T112-1EF
5.1
5.1 5.1
5.1
Q315
0
R355
470
VOLUME
I-MODEL
I-SUFIX
I-KEY1
I-KEY2
Q301
2SC3052F-T1-LF
LED DRIVER
Q309
Q310
2SC3052F
-T1-LF
5.3
R421
10k
D305
MA111-TX
R345
4.7k
R364 22k
R365 22k
SW303
FUNCTION
SW311
x
R325
10
R326
100
R327
100
LED301
1L0341Y23E0CA602
(BACK LIGHT)
0
8.3
8
C343
22
50V
R366 22k
R367 22k
10k
10k
R382
R383
31
3335 303236 34 29
C301
0.7
0.1
R328
10k
O-LED
5.1
8
5.1
C309
C310
22
0.1
50V
R368 22k
R369 1k
R370 1k
R371 1k
R372 1k
R373 1k
R374 1k
R375 1k
10k
R384
R385
1k
R386
1k
R387
1k
D301
*
EC55/EC77:UDZW-TE17-4.3B
GX99:MAZ8043GMLS0
R346
47k
R347
470
M2-
M2+
2SC3440-T12-1F
R354
47k
I-SW3
I-SW1
I-CHACK
I-SW2
I-CLOSE
I-STOCK
I-OPEN
I-KEY-WAKE
STBY_LED
SEG18
SEG19
KTA1271Y-AT
R331
100k
Q303
2SC3052F-T1-LF
+3.6VREG
4.5
*
0.7
Q304
RESET
2SA1365-T112-1EF
5.1
5.1
R376
22k
S301
SEG14
SEG15
SEG16
SEG17
20 15232427 2128 26
22
LCD301
(LIQUID CRYSTAL DISPLAY)
+3.6VREG
Q302
48.4
7.7
R332
10k
6.6
4
R333
100k
0
Q312
R348
47k
Q311~Q318
R349
470
Q316
2SC3440-T12-1F
R356
470
O-M2+
R377
22k
R379 100k
R378 47k
IC302
NJL24H400A
REMOTE
CONTROL
RECEIVER
R389
*
R390
*
SEG11
SEG12
SEG13
16
R334
C303
10k
10
50V
0
Q305
2SC3052F-T1-LF
RESET RESET
R350
47k
MOTOR
DRIVER
R351
470
M1-
M1+
Q317
2SC3440-T12-1F
R358
R357
47k
47k
I-VOL
R389,
*
EC55
EC77
GX99
R392
1
*
*
*
2.2K :
R393
10K :
2
39K :
*
100K :
Not Used : US,CND
SEG9
SEG10
61419 18 17 13
R336
D303
10k
MC2836
R337
03.4
MA111-TX
Q306
RT1N441C-TP-1
5.1
5.15.15.15.1
R380
470
R381
10k
C313
0.22
US
US,CNDEXCEPT
0
3.2
C305
10
50V
SWITCH
Q314
2SA1365-T112-1EF
5.1
Q318
2SC3440-T12-1F
R360
470
O-M1+
I-RMC
R389
R390
22K 100K
10K
4.7K
10K
C306
470
6.3V
R352
47k
R353
470
R361
47k
1K
1K
47K
3.3K
R335
10k
C304
0.1
D302
Q313
2SA1365-T112-1EF
5.1
5.1
5.1 5.1
000
R359
470
O-M1-
3.2
1
3.2
2
3
R390
US
EXCEPT
US,CND
US,CND
1
R392
10K : EXCEPT AEP,UK
Not Used : AEP,UK
R393
2
AEP,UK,RU
1K :
MX
AUS6.8K :
E3,KR,SP
E2
E51,AR
COM0
COM1
COM2
COM3
5
234
1789101112
C314
I-RST
0.047
C315
I-HOLD
0.047
C316
0.047
C307
470
6.3V
C328
0.047
C325
0.047
C326
0.047
C327
0.047
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
C317
1000p
I-SW3
I-SW2
I-SW1
O-M1+
O-M1-
O-M2+
O-M2-
I-CHACK
I-CLOSE
I-STOCK
I-OPEN
O-POWER
O-AMP-ON
O-FUNC-CLK
O-FUNC-DATA
I-RMC
C319 22p
C320
22p
I/O-BUS0
I/O-BUS1
I/O-BUS2
I/O-BUS3
O-CD-BUCK
O-CD-CCE
O-CD-RST
STBY_LED
I-CD-ZDET
O-CD-M-MUTE
R396 0
X301
32.768kHz
R397
470
X302
5MHz
C342
SEG30
SEG29
SEG28
1.4
SEG31
O-CD-REQ
3.433.2
SEG30
AVCC
1.4
SEG29
1
I-TU-DO
I-TU-DO
SEG27
1.4
1.4
979899
SEG28
SEG27
AVSS
O-TP-REC-MUTE
R419
O-TP-REC-MUTE
R420
100k
SEG31
1.4
100
3.2
12345678
O-POWER
3.2
O-AMP-ON
0
O-FUNC-CLK
0
O-FUNC-DATA
3.4
I-CD-SW3
0
I-CD-SW2
0
I-CD-SW1
0
O-CD-M1+
3.2
91011121314151617181920
I-RMC
0
O-CD-M1-
0
O-CD-M2+
0
O-CD-M2-
1.3
XOA
1.2
X1A
3.2
C321
0.1
VCC
VSS
0
I/O-CD-BUS0
0
I/O-CD-BUS1
0
I/O-CD-BUS2
0
I/O-CD-BUS3
0
21 22 23
I-CD-CHACK
0
I-CD-CLOSE
3.4
I-CD-STOCK
3.4
24 25 26 27 28 29 30
I-CD-OPEN
3
O-CD-BUCK
3
O-CD-CCE
3.2
O-CD-RST
3.2
O-LED-STBY
0
I-CD-ZDET
3.2
O-CD-M-MUTE
31323334353637383940414243444546474849
0
C330 0.1
O-CD-REQ
SEG26
1.4
SEG26
I-P-MONI
1.6
22k
I-P-MONI
SEG25
1.2
1.4
SEG25
I-KEY1
3.4
3.4
D304
MA111-TX
I-KEY1
I-KEY2
C332
0.01
0.1
1.3
3.2
X1
X0
VSS
2
IC301
IC MB90803PF-G-129E1
SYSTEM CONTROLLER
I-TP-STATE
I-KEY2
I-TU-ANSD
0.903.4
I-TU-ANSD
I-KEY-WAKE
I-TP-STATE
SEG24
SEG23
1.4
1.4
VCC
SEG24
I-HOLD
I-KEY-WAKE
3.403.2
I-HOLD
O-CD-SBSY
SEG22
1.4
SEG22
SEG23
O-CD-SBSY
GND
R388
SEG21
1.4
O-LED
0
SEG21
O-LED
SEG20
1.4
SEG20
I-MODEL
0.9
I-MODEL
US,CND
SEG19
SEG18
1.4
1.4
SEG19
I-SUFFIX
3.420
I-VOL
I-SUFIX
SEG17
1.4
828384858687888990919293949596
SEG18
I-RE-VOL
O-CD-ON
SEG16
1.4
SEG17
O-CD-ON
81
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
O-TU-DI
O-TU-CLK
O-TU-CE
RESET
NC
50
R399
CMO3
CMO2
COM1
COM0
VLCD
1.4
SEG15
1.4
SEG14
2.1
SEG13
2.1
SEG12
2.1
SEG11
1.4
SEG10
1.4
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
VSS
VCC
6465666768697071727374757677787980
SEG1
SEG0
MD0
MD1
51525354555657585960616263
MD2
10k
SEG9
1.4
SEG8
1.4
SEG7
1.4
SEG6
1.4
SEG5
1.4
SEG4
1.4
SEG3
1.4
SEG2
C341 0.1
3.2
1.4
SEG1
SEG0
1.4
1.4
COM3
COM2
1.4
1.4
COM1
COM0
1.4
100k
2.7
R402
0
O-TU-DI
0
O-TU-CLK
0
O-TU-CE
3.2
I-RST
3.2
MD0
3.2
0
R400
0
R401
MD2
0
C340
0.047
No mark:
CD PLAY
HCD-EC55/EC77/GX99
77
HCD-EC55/EC77/GX99
PRINTED WIRING BOARDS — KEY SECTION —
34567
DISPLAY
SW302
A
B
12
KEY-LEFT BOARD
C
KEY-RIGHT BOARD
KEY-RIGHT BOARD
SW316
D
SW318
SW318
R418 R417 R416 R415 R414
R418 R417 R416 R415 R414
EQ
SW317
DSGX
E
• :Uses unleaded solder.
STANDBY
LED302
SW301
R404
–
1
1-872-056-
SW315
+
CN403
13
(13)
CN401
(
F
PANEL BOARD
W304
SUPPLEMENT-1
Page 6
TUNING MODE
TUNING MODE
1-872-057-
(
PLAY MODE/
PLAY MODE/
SW314
SW314
13
(13)
SCHEMATIC DIAGRAM — KEY SECTION —
1 2 3 45
A
B
KEY-RIGHT BOARD
C
SW318
EQ
KEY-LEFT BOARD
R404
1k
DISPLAY
SLR-325VCT31P
DSGX
R417
22k
R418
47k
SW301SW302
LED302
STANDBY
R416
10k
D
T P409
T P410
T P411
T P412
R415
4.7k
SW314SW315SW316SW317
PLAY MODE
/TUNING MODE
R414
2.2k
1
2
3
4
KEY- 0
GND
AVCC
STBY-LED
CN401
TP415
TP416
F
PANEL
4P
1
KEY- 2
2
GND
BOARD
W304
SUPPLEMENT-1
(
Page 7
2PCN403
(
H
PANEL
BOARD
W306
SUPPLEMENT-1
(
Page 7
(
F
G
H
KEY-CD BOARD
SW309
SW308
DISC 3
DISC 3
R410
R410
R409
R409
R407
R407
R408
R408
W402
R411
R411
SW307
DISC 2
DISC 2
PANEL BOARD
G
SUPPLEMENT-1
(
W305
Page 6
PANEL BOARD
H
W306
SUPPLEMENT-1
(
Page 6
(
(
E
SW310
SW310
DISC SKIP/
EX-CHANGE
SW306
DISC 1
DISC 1
1-872-058-1-872-058-
13
(13)
KEY-CD BOARD
R411
47k
DISK SKIP/
EX-CHANGE
SW309SW310
R410
22k
SW308
DISC 3
R409
10k
SW307
DISC 2
R408
4.7k
SW306
DISC 1
R407
2.2k
TP413
TP414
KEY- 1
1
GND
2
2PW 402
(
G
PANEL
BOARD
W305
SUPPLEMENT-1
Page 7
(
HCD-EC55/EC77/GX99
88
HCD-EC55/EC77/GX99
PRINTED WIRING BOARD — HI-AMP SECTION —
12
A
HI-AMP BOARD
IC101
C104
R106
R130
C116
JW119
15
C106
R105
JW101
B
EC55:AEP,UK,KR
EC77:AEP,RU
EC55:EXCEPT
AEP,UK,KR
EC77:EXCEPT
AEP,RU/GX99
C
D
C153
R129
JW120
A001
• :Uses unleaded solder.
345678910
EC55-EC77:
EXCEPT US,CND
C105
C103
C111
E
Q152
R168
R119
R120
C155
D151
IC102
R152
JW116
JW117
JW118
C152
E
R160
Q151
D152
R167
R162
EC77:US,CND/GX99
1
R151
C151
R161
R159
C154
R166
C101
R109
C107
R121
R122
R156
R165
R107
R155
R108
JW114
R110
C102
C113
C108
C109
R111
JW113
R112
C110
JW112
R124
JW110
R123
JW111
EC55
C118
Q101
R103
R104
E
D121
R125
R127
R126
R101
R102
C115
R128
C119
C120
E
Q102
CN101
1-872-062-
13
(13)
EC77/GX99
MAIN BOARD
C
CN602
SUPPLEMENT-1
(
Page 3
EC55
L
MAIN BOARD
CN603
SUPPLEMENT-1
(
Page 3
(
(
HCD-EC55/EC77/GX99
• Semiconductor
Location
Ref. No.
D121 C-6
D151 D-3
D152 C-3
IC101 B-2
IC102 B-3
Q101 C-6
Q102 C-7
Q151 C-3
Q152 C-2
Location
99
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