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Model
HMD-A420
Pages
44
Size
1.09 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hmd-a420.pdf
Date
PREV: Sony HMD-A200 (serv.man2) Service Manual

Sony HMD-A420 Service Manual ▷ View online

5-3
5-4
B-SS3545<AEP>-BD2-EPS05
CN902
1
+5V
IC903
RESET
IN
OUT
19
20
PD0/V SYNCO
34
PA6
PD4/ITB
ABL/O
H_RETURN
24
17
18
19
16
14
8
HDRV
5
OUT
3
FLYBACK
13
VOUT1
12
IC401
V OUT
VOUT2
15
USBDM
14
USBVCC
16
USBDP
1
HFLB
11
EWDRV
5
BIN
6
BDRV
3
BOP
32
FOCUS
32
OSCOUT
33
X901
24MHz
OSCIN
X7000
6MHz
23
PD3/ITA/VFBACK
BOP CONT
Q510, Q513
D517
+12V
1
3
SWITCHING 
Q501
B DRIVE
Q515,516
H DRIVE
Q520,521
BUFF
Q526
H DRIVE
OUT
Q502
H DRIVE 
Q523,527
H OUT
Q503
T503
L505
IC 501
DEFLECTION
CONTROL
IC901 CPU
H CENT
Q519
OVP
Q525, 534
H CENT
DRIVE
 Q517,518
S CAP CHANGE 
Q505, Q506-Q509,
Q524, Q536, Q537
TILT DRIVE
Q541, Q542
IC504 (1/2)
AMP
IC607
+12V REG
+12V
6
PS5/PWM5
8
PC7/PWM7
7
TEST
5
SDA
6
SCL
4
PC3/PWM3
9
PB7/AIN3/PWM1
31
PA7/BLANKOUT
35
PA5
10
PB6/AIN2/PWM0
HSYNCI
Reset
1
H DY(+)
CN501
2
H DY(+)
3
H DY(–)
4
H DY(–)
5
V DY(–)
6
V DY(+)
ROTATION+
µ
-COM, DEFLECTION CONTROL,
DEFLECTION, HV, POWER SUPPLY,
H.DF, V.DF, USB CONTROL
CN505
TILT(ROTATION)
COIL
ROTATION-
1
2
7 +V IN
1
HV
12
11
14
13
15
4
FV1
FV2
10
8
7
6
3
9
FV1 TO CRT
HV
TO CRT ANODE CAP
H.DY
V.DY
FV2 TO CRT
1 -V IN
VSYNC
21
PD1/H SYNCO
15 HSYNC
CLBL
HUNLOCK
SCL
SDA
VSYNCI
PD6/CLAMPOUT
PB1/SDAD
PB0/SCLD
26
28
22
27
PD2/C SYNCI
25 PD5/HFBACK
11 PB5/AIN1
PC0/HSYNCDIV
1
PB3/SDAI
IC902
EEP ROM
PB2/SCU
+81V
+200V
+16V
+12V
+5V
-12V
+5V
D601
AC RECT
TH601
LF601
LFT
RY601
RELAY DRIVE
Q615
A
G
K
IC606
SW
Q601
D610
D609
IC601
PWM CONTROL
8
7
Vcc
6
3
11
10
12
13
16
9
1
SWITCHING
Q602
IC602
VOLTAGE
FEED BACK
IC603
VOLTAGE
FEED BACK
3
V AEF
4
OSC
OUT
I SENSE
1
COMP
2
FB
FB603
D626
D623
D604
D612
D613
D628
D631
D615
+16V SW
Q609
+6.3V SW
Q607
IC6000
T603 PIT
D616
D617
TH602
PA3
37
PA2/TD0
38
PS6/PWM6
7
PA1/RDI
39
PA0/OCMP
42
PB4/AIN0
12
3
4
5
6
C SYNC BUFF
Q901
H SYNC BUFF
Q902
H-IN
V-IN
PCDET
SDA
SCL
DGC
AC-SOCKET
CN602
CN601
F601
1
NC
2
DGC
DGC
3
40
3
1
18
30
29
D
R
K
A
SW601
POWER
L606
D627
T601
IN
OUT
TO A BOARD
CN303
C
5
1
3
4
6
CN603
ABL
+81V
+12V
HERTER
+5V
5
1
3
4
6
+6.3V SW
CONT
Q608
ABL CONT
Q533
VR501
HV
ADJ
CN901
TO A BOARD
CN302
TO A BOARD
CN305
3
B
9
7
6
2
1
5
CLAMP
SOG
H_RTN
V_RTN
SDA/I
SCL/I
G1
CN903
MENU
ORANGE/LED
GREEN/LED
1
2
3
D
TO H BOARD
P701
3
1
2
–
+
T502
1
5
9
6
5
10
8
2
1
6
F
TO A BOARD
CN304
3
4
1
2
CN502
CS0
CS1
CS2
CS3
RY501
RELAY DRIVE
Q540
SW
Q511
E
TO A BOARD
CN309
1
CN504
1.2kV
SW
Q401
Q531
Q532,535
BOP CONT
Q532,535
5
PC4/PWM4
ABL CONT
Q528, 529
A
T504
T501
FBT
5
11
7
DF AMP
Q514, Q543, Q544,
Q547-Q549
DF AMP
Q504, Q530
IC502
PWM CONT
8
6
3
V REF
4
OSC
OUT
I SENSE
1
COMP
2
FB
SYNC BUFF
Q538, 539
D509
D521
D511
D512
Q522
T6000
5
6
4
2
PH6000
PH6001
D6000
D6005
D620
K
G
A
IC6001
Q6000
13
AO2
14
15
AO3
AO4
IC4000
2 SCL
3 SDA
IC504 (2/2)
AMP
3
1
2
–
+
IC4002
AMP
3
1
2
–
+
IC4001
AMP
3
1
2
–
+
+12V
+15V
CN506
1
2
CN4001
1
2
3
4
V.CONV DRIVE
Q4003, Q4004
H.CONV DRIVE
Q4001, Q4002
CN904
1
2
USB DM
SDA
SCL
SDA
SCL
USB DP
P7000
1
2
USB DM
USB DP
2
V1
P8D1
6
M1
5
P1
1
V2
4
M2
3
P2
IC7000
USB CONT
28 DM0
29 DP0
20 XTAL2
19 XTAL1
23 INDV/SCL
22 OPTION/SDA
USB BLOCK
USB DB_A BLOCK
USB DB_B BLOCK
2
6
5
1
4
3
V1
P7D1
M1
P1
V2
M2
P2
CN2903
1
2
3
CN2903
1
2
3
CN2903
1
2
3
CN2903
1
2
3
IC7001
2
8
FLGA
1
ENA
4
ENB
3
7
32
2
8
FLGB
OC1_N
PSW1
PSW2
OC2_N
27
26
31
30
DP1
DM1
DP2
DM2
5
4
13
12
DP3
DM3
DP4
DM4
OUTA
5
OUTB
IC7002
2
8
FLGA
1
ENA
4
ENB
3
9
16
17
10
FLGB
OC3_N
PSW3
PSW4
OC4_N
OUTA
5
OUTB
5
2
1
4
6
7
V3
P8D2
M3
P3
V4
M4
P4
V3
P7D2
M3
P3
V4
M4
P4
5
2
1
4
6
7
5-5
5-6
5-2. FRAME  SCHEMATIC  DIAGRAM
5-3. CIRCUIT  BOARDS  LOCATION
A 
D
H 
DGC
A
D
HV
H
USER
CONTROL
DEFLECTION,HV,POWER SUPLLY,
H.DF, V.DF, USB CONTROL
V DY
H DY
RGB OUT
VIDEO,
µ-COM,DEFLECTION CONTROL,
B-SS3545<AEP>-KESSENZU-EPS05
1
2
3
4
5
6
7
8
9
CN301
6P
RGND
RED
GGND
GREEN
BGND
BLUE
H-IN
V-IN
GND
1.2kV
CN309
1P
1
1
2
3
4
CS1
CS0
CS3
CS2
CN304
4P
H
G1 G2
HG
RGB
PICTURE
TUBE
1
2
3
4
5
6
7
CN902
7P
H-IN
GND
V-IN
PCDET
SDA
SCL
PC+5V(NC)
CN505
2P
COIL
TILT(ROTATION)
ROTATION-
ROTATION+
1
2
CN506
2P
1
2
6
V DY+
V DY-
H DY-
H DY-
H DY+
H DY+
5
4
3
2
1
CN502
CS2
CS3
CS0
CS1
1
2
3
4
4P
CN501
6P
4
3
2
1
CN4001
6P
1.2kV
CN504
1P
1
1
2
3
4
P701
7P
MENU
GND
ORG LED
GRN LED
1
2
3
CN602
3P
DGC
NC
DGC
L
G
N
CN601
AC-SOCKET
1
2
3
4
CN903
4P
MENU
ORANGE/LED
GREEN/LED
GND
1
2
3
4
5
6
7
8
9
CN302
9P
SOG
GND
H_RTN
V_RTN
G1
GND
CLAMP
SDA/I
SCL/I
1
2
3
4
5
6
7
8
9
10
CN901
10P
SCL/I
SDA/I
CLAMP
GND
G1
V_RTN
H_RTN
GND
SOG
Auto-Size(NC)
1
2
3
4
5
6
7
CN603
7P
+81V
+12V
ABL
GND
+5V
+6.3V
GND
1
2
3
4
5
6
7
CN303
7P
+81V
GND
GND
+6.3V
+12V
ABL
+5V
VIDEO CABLE
1
2
3
4
CN301
6P
PCDET
+5V
DDC SCL
DDC SDA
VIDEO CABLE
1
2
3
4
5
6
CN902
7P
H-IN
GND
V-IN
PCDET
SDA
SCL
HV Regulator
Circuit Check
HV Hold-down
Circuit Check
Beam Current
Protector Circuit
Check
Part Replaced (
]
)
D board IC502, R515,
T501 (FBT)
•
 Mounted D board
D board D538, IC901, Q534,
R521, R551, R552,
R598, R599,
T501 (FBT)
•
 Mounted D board
D board IC901, R911, R949,
R950, T501 (FBT)
•
 Mounted D board
5-7
5-8
5-4. SCHEMATIC  DIAGRAMS  AND  PRINTED
WIRING  BOARDS
Note:
•
All capacitors are in µF unless otherwise noted. (pF:  µµF)
Capacitors without voltage indication are all 50 V.
•
Indication of resistance, which does not have one for rating
electrical power, is as follows.
Pitch: 5 mm
Rating electrical power 1/4 W (CHIP : 1/10 W)
• All resistors are in ohms.
•
f
: nonflammable resistor.
•
F
: fusible resistor.
•
f
: internal component.
•
p
: panel designation, and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
•
e
: earth-ground.
•
E
: earth-chassis.
• All voltages are in V.
• Readings are taken with a 10 M  digital multimeter.
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal production
tolerances.
•
*
: Can not be measured.
• Circled numbers are waveform references.
•
s
: B + bus.
•
S
: B – bus.
• When replacing components identified by 
]
, make the
necessary adjustments indicated. (See page 3-1)
• When replacing the part in below table, be sure to perform the
related adjustment.
•
Divided circuit diagram
One sheet of D board circuit diagram is divided into six
sheets, each having the code D-
a
 to D-
f
. For example, the
destination ab1 on the D- a  sheet is connected to ab1 on the
D-
b
 sheet.
b
1
a
Ref. No.
Circuit diagram division code
Note: The components identified by shading and mark
0
 are critical for safety. Replace only with part
number specified.
Note: Les composants identifiés par un tramé et une
marque 
0
 sont critiques pour la sécurité. Ne les
remplacer que par une pièce portant le numéro
spécifié.
Schematic diagram
 Board
l
l
l
l
l
H
(1) Schematic Diagram of H Board
1
A
B
C
D
2
7
6
5
4
3
1
2
3
4
P701
7P
MENU
GND
ORANGE/LED
GREEN/LED
R709
15k
1%
R705
6.19k
R702
10.2k
1%
H
(USER CONTROL)
6
3
5
4
2
R706
3.83k
R701
2.15k
1%
1
LED701
LT6463-23-D51
SW701
B-SS3545<AEP>-H..-EPS05
(POWER)
TO D-a BOARD
CN901
MENU
1
A
B
C
D
E
F
G
H
I
2
12
13
11
10
9
8
7
6
5
4
3
14
5-9
(2) Schematic Diagram of A Board
5-10
• A  BOARD  WAVEFORMS
0.75 Vp-p (H)
1
H
1.08 Vp-p (H)
2
0.75 Vp-p (H)
3
4
5
6
43.5 Vp-p (H)
43.5 Vp-p (H)
44.5 Vp-p (H)
H
0.2
0.8
1.1
-0.2
0.1
2.6
0.1
2.9
0.1
0.1
2.6
4.4
0.6
1
2
3
2.0
2.9
1.5
4.4
1.1
2.1
4.7
0.6
2.1
2.9
2.9
5.0
5.0
0.2
0
0
0
0
3.8
5.0
1.3
5.0
5.0
5.0
4
5
6
5.0
0
4.4
0
2.1
2.9 2.0
53.1
41.9
52.7
5.0
1
2
3
4
5
6
7
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
H
G1 G2
HG
HV
RGB
1
2
3
4
5
6
5
6
7
8
1
2
3
4
CN301
D101
D102
D201
D202
D301
D302
C202
C203
C303
C103
R016
C025
R046
C023
R012
R007
R017
D002
2µH
FB002
150µH
FB005
150µH
FB004
CN303
R011
R009
R020
R015
D004
R027
R028
R026
D003
R022
C026
R029
C029
R030
R213
C030
R039
C033
C034
C032
R018
R019
R014
R013
C304
C204
C104
R006
R005
R303
R304
R204
R104
L001
R004
C005
C006
C008
R008
R010
C013
R034
C102
C302
C004
C022
R103
R203
SG001
J001
C043
R313
R113
R301
R201
R101
C014
Q002
C002
IC001
Q003
R021
C042
IC003
IC004
IC002
Q001
9P
1N4148
1N4148
1SS119
1SS119
1SS119
1SS119
10 50V
0.1
50V
0.1
50V
0.1
50V
470
0.1
50V
3k
100
10V
1k
100
100
1N4148
7P
470
1k
4.42k
240
1/4W
1SS119
1k
1k
470
MTZJ5.1B
2.4k
2200p
50V
1.5k
1000p
50V
10k
33
470
16V
2.4k
4700p 50V
0.1
50V
1 50V
100
100
4.7k
4.7k
0.1
50V
0.1
50V
0.1
50V
10k
1k
1k
12
12
12
100µH
100
470
16V
0.1
50V
0.1
50V
2.4k
100
0.1
50V
10k
1/2W
R035
2.2M
1/2W
10 50V
10 50V
0.22
16V
390p
50V
1k
1k
CRT_SOKET
4.7
35V
N.P
33
33
75
75
75
1000p 2kV
2N3904
CLAMP AMP
220
16V
M52743BSP
PRE AMP,OSD MIX
2N3904
H SYNC BUFF
RN1203
Q005
V SYNC
BUFF
10k
12p
50V
M35047
OSD
LM358
AMP
LM2412
RGB OUT
2N3904
CLAMP AMP
RGND
RED
GGND
GREEN
BGND
BLUE
7
8
9
GND
V-IN
H-IN
+81VS
GND
GND
+6.3V
+12V
ABL
+5V
RIN
VCCR
OSDR
GNDR
GIN
SOGI
VCCG
OSDG
GNDG
BIN
VCCB
OSDB
GNDB
ABLIN
NC
VCC
VCC2
ROUT
EXTFB
GOUT
EXTFB
MBRI
BOUT
EXTFB
BLK
DA1
DA2
DA3
DA4
GND5
SDA
SCL
CLAMP
SOG OUT
OSD BLKIN
VDD2
P4
P3/G
P2
P1/R
P0/BK0
VSS
CPOUT
VIR
CS
SCK
SIN
TCK
VDD1
P7
+IN.B
-IN.B
OUT.B
Vcc
Vee
+IN.A
-IN.A
OUT,A
AC
VERT
HOR
P5/B
P6
GNDA
+5V
+5V
+5V +12V
+12V
+12V
+5V
+5V
+5V
+5V
+5V
+80VF
+6.3V
+5VF
+12V
+12VF
+6.3V
+12V
8
9
10
7
6
1
2
3
4
5
11
12
13
14
15
SIGNAL IN
HD15
PIG-TAIL
PICTURE
TUBE
V901
TO
D BOARD FBT
+12V
+5V
C017
0.1
100V
B-SS3545<AEP>-A..-EPS05
1.2kV
L101
0.1µH
L201
0.1µH
L301
0.1µH
R042
100
2
3
4
5
6
VCC
G VOUT3
GND2
R VOUT2
GND1
1
B VOUT1
7
8
9
10
11
B VIN1
VBB
R VIN2
G VIN3
GND
+12VF
C010
C009
0.1
50V
47
16V
FB006
3µH
+80VF
C019
C011
0.1
100V
C012
0.1
100V
10
100V
R108
20k
R208
20k
R308
20k
1/2W
C045
10000P
3kV
D017
ER106
1
2
3
4
5
6
7
8
9
CN302
9P
SOG
GND
H_RTN
V_RTN
G1
GND
CLAMP
SDA/I
SCL/I
CN309
1P
1
C035
100
10V
A
(VIDEO,RGB OUT)
1
2
3
4
CS1
CS0
CS3
CS2
R001
100
R037
100
R036
100
R002
100
R024
150k
+12V
+12V
R023
1M
C015
0.47
16V
C039
100
16V
C016
1000p
R033
220k
C028
330p
R031
22M
R032
1K
C037
0.22
16V
Q004
2SC4634
G2 CONT
R025
2.2k
+12V
D001
1SS119
C038
47
16V
FB001
0.45µH
R215
100
1/2W
R115
56
1/2W
R315
56
1/2W
Q301
2SC1921
B CUT-OFF
R309
470
R307
5.1k
+80VF
C307
0.1
D305
HSS82
D304
HSS82
D303
HSS82
R311
47k
C306
0.1
100V
L302
0.1µH
Q201
2SC1921
R209
470
R207
5.1k
+80VF
C207
0.1
100V
C040
0.01
D205
HSS82
D204
HSS82
D203
HSS82
R211
47k
C206
0.1
100V
L202
0.1µH
Q101
2SC1921
R109
470
R107
5.1k
+80VF
C107
0.1
D105
HSS82
D104
HSS82
D103
HSS82
R111
47k
C106
0.1
100V
L102
0.1µH
G CUT-OFF
R CUT-OFF
R112
100
1/2W
R212
100
1/2W
R312
100
1/2W
SG101
SG201
SG301
CN304
4P
TO D-a BOARD
CN901
TO D-d BOARD
CN603
TO D-b BOARD
CN504
TO D-b BOARD
CN502
C020
47
16V
C105
0.1
C105
0.1
C120
0.1
JW035
3µH
C053
2200p
C055
33p
C052
330p
C056
33p
C054
0.1
R302
4
3
2
1
PCDET
DDSDA
DDSCL
+5V
CN306
4P
1
2
3
4
5
6
CN305
6P
H-IN
GND
PCDET
V-IN
DDSDA
DDSCL
TO D-a BOARD
CN902
FB008
R106
47
R120
47
R105
47
5
6
7
8
4
3
2
1
24C21
IC005
DDC
SDA
SCL
VCLK
VCC
VSS
/WP
NC
/TEST
D013
1N4148
R102
4.7k
D012
1SS119
FB010
FB009
D008
1SS119
D010
1SS119
D009
1SS119
D011
1SS119
C109
220p
C041
220p
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