Sony TRINITRON HMD-A420 Service Manual page 28

a a b b c c d d e e f f
a a , b b , c b c c , d d , e d e , f e f f ) Board
(3) Schematic Diagrams of D (a
3
1 2
D
-a
A
(µ-COM,DEFLECTIONÅ CONTROL)
ad1
B
C902 2.2
R902 1k
C903 2.2
R903 1k
C C904 2.2
R904 100
C905 2.2
R905 1k
R948 R914
33.2
H-DRIVER 1.4k R906 1k
R915 C906
2.2
30.1k
1N4148
ac1
R949
51k
ABL/O
R950
C924
510k 4.7
MENU
D
C909
D911
470p
1N4148
CN904
3P
FB902 0.45µH
USB DM 1
USB DP 2
FB903 0.45µH
GND 3
+5V
C912 C913
TO D-f BOARD 22p 22p
P7000
R921
1k
CN903
E
4P
C930
MENU
220p
MENU 1
ORANGE/LED
ORANGE/LED 2
GREEN/LED
GREEN/LED
3 VSYNC/O
GND 4
HSYNC/O
TO H BOARD
P701
Q902
H2N3904
H SYNC BUFF
C915
100p
D901
R919 0.5 HZ5C1
F
4.7k
CN902 R920
10k
7P
H-IN 1
D902
GND MTZJ5.1A
2
V-IN 3
PCDET 4
R952 47
SDA
5
SCL 6
R947 47
PC+5V(NC) 7
C926 C927
TO A BOARD
100p 100p
G
CN305
CN901
10P
SCL/I
1
SDA/I 2
CLAMP 3
GND
4
G1 5
V_RTN 6
H_RTN 7
GND 8
H
SOG 9
Auto-Size(NC) 10
TO A BOARD
CN302
I • 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.
a b 1
Ref. No.
Circuit diagram division code
4
5 6
+5V
R900
15k
IC901
ST72754
CPU +5V
TH602
C900 R939
10k 0.1 10k
PC0/
PA0/OCMP
HSYNCDIV
R907 R942
IC903
47
1k R940
M51951B
10k
PC1/VA TEST/Vpp RESET
5.0
5.0
PC2/PWM2 Reset 3 OUT IN 1
1.2 R938 GND
2.0 10k
2
C923
PA1/RDI
PC3/PWM3 2.2
R941
1 47
PC4/PWM4 PA2/TDO
R954
0 4.7k
R953
PS5/PWM5 PA3
10k
4.9
PS6/PWM6 PA4
2.5
2
4.9
PC7/PWM7 PA5
C928
+5V
D910 0.1 0.1
PB7/AIN3/
PA6
R908 10k PWM1
3.1 R936 X901 C922
2.2 1M 24MHz 22p 50V
R909 1k
PB6/AIN2/
OSCIN
C928 PWM0
5 C921
0.1
2.3 22p 50V
R911 1k R937 47
PB5/AIN1 OSCOUT
R912 10k C925
0.1
0.1
PA7/
PB4/AIN0
BLANKOUT
4.9
FB901 2µH
4.9
VDD PB3/SDAI
C908
0.1
5.0
USBVCC PB2/SCU
R916
+5V
1.5k 0.7-4.0
USBDM PB1/SDAD
D908
R935
10k 1SS119
4.1
USBDP PB0/SCLD
C911 C910 C907
R946
0.1 0.1
10 5.0 100
VSS PD6/CLAMPOUT
R913 +5V
0.5
3
1.7 1k
HSYNCI PD5/HFBACK
R951
R943 R926
4.2 4 4.7k
1k 0.2 100
VSYNCI PD4/ITB
R925
0
10k
-0.6
PD0/ PD3/ITA/
VSYNCO VFBACK
0.4
4.6
PD1/ PD2/
H_RETURN
HSYNCO CSYNCI
D906 D905
HZ5C1 HZ5C1
+5V
R918
10k
C914
R944
100p
470
Audio_Mute
+5V
R929 R930
R928
10k 10k 10k
R931
10k
D903 D904
HZ5C1 HZ5C1
+5V
R924
1k
4.6
Q901
H2N3904
C SYNC BUFF
0.2
R922 R923
10k 10k
• D - a BOARD WAVEFORMS
1 2
3.4 Vp-p (H)
3.2 Vp-p (H)
Schematic diagram
5-15
D
-a board
7 8 9
R402 C406
1.82k 3300p
1% 100V
+12V
R5121 C570
10K 10
50V
0.7
C563 2
7
330 + 6
16V
0.7
Q541
C409 1
2SD667 -
4
1000p
R5122 TILT DRIVE
100V
56.2k IC401
-2.0 TDA8172
-1.4
V OUT
IC504(1/2)
LM358
0.3 R5124
AMP
2 8 100
1 C580
3 0.1
100V
4
-2.0
0.3 Q542
2SB647
C571 R5123
TILT DRIVE
0.1 10k
-12V
50V
C572
47
16V
C579
R5125 C581
3300p
0.22 50V
100V 430
R5120
46.4k -12V
Q526
RN1203
R529
BUFF 1k
0.8
0.1
0.2 0.8
HUNLOCK CLBL
+5V
5.0 0.4
SCL HSYNC
R934 4.9 6 0
47 C920
0.1
SDA VSYNC
C5001 C5000
7
33p 33p 2.9
IC902
24LC16 COR VOUT1
EEPROM
8 2.9
VSOMD VOUT2
Vcc A0 C502
0.1
3.2 9 2.8
63V
4.9
VAGC EWDRV
TEST A1
C510 C534
R502
3.1 1000 0.1
22.1k 1%
16V 50V
VREF VCC
SCL A2
C503
2.7
5.0 0.1
VCAP DGND
SDA Vss
5.7
4.9
GNDS HDRV
C504 0.01 100V
10
R932 R503 4.7k
22
HPLL1 PGND
C505 2.4
R933 0.1
22
HBUF BDRV
R505
R504
2.8k R592
732 1.0 5.3
1%
47k
1%
HREF BIN
C919 C918 C506
47p 47p
0.01 2.6 2.5
100V
HCAP BSENS
C507
R507
4.5 1.5
4700p 10k
100V
HPLL2 BOP
5.4 2.5
HSMOD XRAY
6.1
FOCUS HFLB
6.3 0.2
IC501 R501
TDA4841 27k
DEFLECTION
CONTROL
4 5
3
2.8 Vp-p (24MHz)
5.0 Vp-p (H) 4.0 Vp-p (V)
l l l l l
10 11
12 13
ad2
ab1
+17V
D402
R403
1N4002 2.2 1/2W
C404
1000
C408 25V
470
35V
-14.3
ab2
ab3
3
5
0.1
R407 C405
330 0.22
R401 1W 50V
2.05k
C403
0.022
100V
R404 R406
0.75 1.5
2W
C402
470
25V
CN505 2P
1
ROTATION+
2 ROTATION-
TILT(ROTATION)
COIL
ae1
R411 R412
6.81k 6.81k
1% 1%
BLANK OUT
R510 R511
100 100
C512 C513
220p 220p
50V 50V
+12V
L509
150µH
R571
4.7k
R508 R522
13k 4.7k
R513
100
HDRV
R500
43
BDRV
BOP
C531
R596
0.01 150k
C509
3300p
100V
HFLB
D501
R506 C508
10k 100p 1SS119
50V
FOCUS
HUNLOCK
G1/VBLK
ab4
B-SS3545<AEP>-D..-P1-EPS05
6 7 8
5.0 Vp-p (H) 5.0 Vp-p (V) 3.0 Vp-p (V)
5-16
14
9 0
2.0 Vp-p (V) 12.0 Vp-p (H)