Sony CMT-SV2D / HCD-SV2D Service Manual ▷ View online
37
37
HCD-SV2D
HCD-SV2D
7-14. SCHEMATIC DIAGRAM — POWER SECTION (E3, SP, TH MODEL) —
MAIN
BOARD
CN301
(Page 28)
FW901
D
*
*
Not replaceable : Built in transformer
POWER TRANS FORMER (MAIN)
POWER TRANS FORMER (SUB)
VOLTAGE SELECTOR
AC IN
POWER BOARD
(E3,SP,TH MODEL)
Ver. 1.1
38
38
HCD-SV2D
HCD-SV2D
7-15. SCHEMATIC DIAGRAM — POWER SECTION (US MODEL) —
MAIN
BOARD
CN301
(Page 28)
D
FW901
*
*
Not replaceable : Built in transformer
POWER TRANS FORMER (MAIN)
POWER TRANS FORMER (SUB)
JW903
R902 3.3M
POWER BOARD
(US MODEL)
AC IN
1.6A / 250V
Ver. 1.1
39
HCD-SV2D
• Waveforms
– MAIN Board –
– MAIN Board –
– MPEG Board –
1
IC501
ej
(XT2)
30.5
µ
s
5.3 Vp-p
1 V/DIV, 10
µ
s/DIV
2
IC501
r;
(X2)
120 ns
5.0 Vp-p
1 V/DIV, 50 ns/DIV
3
Q212 (collector)(TAPE REC)
10.7
µ
s
91.2 Vp-p
20 V/DIV, 5
µ
s/DIV
4
U707
<zcv
(XIN)
58.9 ns
3.9 Vp-p
1 V/DIV, 25 ns/DIV
5
UD705
<zn/
(XO)
37 ns
3.5 Vp-p
1 V/DIV, 10 ns/DIV
6
UD705
<zm/
(CVBS/C)
H
950 mVp-p
500 mV/DIV, 10
µ
s/DIV
40
HCD-SV2D
IC651 uPD16315GB-3BS
•
IC Block Diagrams
– KEY Board –
1
2
3
4
5
4-bit latch
24-bit output latch
12-bit shift register
Data selector
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
Serial
interface
OSC
Timing generator
key scan
Display memory
24 bits x 12 words
Key data memory
(2 x 16 bits)
Command decoder
segment driver
Grid driver
Multiplexed driver
39
40
41
42
43
44
LED1
LED2
LED3
LED4
OSC
DOUT
DIN
CLK
STB
KEY1
KEY2
VSS
VDD
SEG1/KS1
SEG2/KS2
SEG3/KS3
SEG4/KS4
SEG5/KS5
SEG6/KS6
SEG7/KS7
SEG8/KS8
SEG9/KS9
SEG10/KS10
SEG20/GRID9
SEG21/GRID8
SEG22/GRID7
SEG23/GRID6
SEG24/GRID5
GRID4
GRID3
GRID2
GRID1
VDD
VSS
SEG11/KS11
SEG12/KS12
SEG13/KS13
SEG14/KS14
SEG15/KS15
SEG16/KS16
VEE
SEG17/GRID12
SEG18/GRID11
SEG19/GRID10
Ver. 1.1
Click on the first or last page to see other CMT-SV2D / HCD-SV2D service manuals if exist.