Sony CMT-SX2D / HCD-SX2D Service Manual ▷ View online
41
41
HCD-SX2D
HCD-SX2D
7-21. SCHEMATIC DIAGRAM — POWER SECTION (EXCEPT KR) —
MAIN
BOARD(3/3)
CN301
(Page 29)
FW901
D
*
*
Not replaceable : Built in transformer
POWER TRANS FORMER (MAIN)
POWER TRANS FORMER (SUB)
VOLTAGE SELECTOR
AC IN
POWER BOARD
JW906
JW905
JW911
F901
T1AL/250V
3
1
4
5
6
2
1
2
3
4
5
6
7
8
9
1
2
JW907
V
JW910
JW912
TH
TH
E3,SP
(EXCEPT KR)
Ver. 1.2
42
42
HCD-SX2D
HCD-SX2D
• Waveforms
– MPEG Board –
– MPEG Board –
– MAIN Board –
1
U2
<zbm
(RFP)
4
U2
<zv,
(CVBS/G/Y)
5
U2
<zbc
(C/B/U)
6
U2
<zbz
(Y/R/V)
2
U2
<zvv
(GCLX)
3
U2
<zb/
(CVBS/C)
200 mV/DIV, 100 ns/DIV
1 V/DIV, 20
µ
s/DIV
500 mV/DIV, 20
µ
s/DIV
500 mV/DIV, 20
µ
s/DIV
1 V/DIV, 20 ns/DIV
500 mV/DIV, 20
µ
s/DIV
1000 mVp-p
H
2 Vp-p
H
1.1 Vp-p
H
0.9 Vp-p
37 ns
4.1 Vp-p
H
2 Vp-p
7
IC501
ej
(XT2)
30.5
µ
s
4.1 Vp-p
1 V/DIV, 10
µ
s/DIV
8
IC501
r;
(X2)
119 ns
3.6 Vp-p
1 V/DIV, 50 ns/DIV
9
Q344 (collector)(TAPE REC)
11.8
µ
s
10.9 Vp-p
20 V/DIV, 5
µ
s/DIV
– AMP Board –
SUB
Bias Circuit
Pre Driver
CH1
Pre Driver
CH2
3
2
1
4
6
5
8
7
13
10
11 12
9
14 15
CH2_IN
CH2_NF
ST_BY
CH1_NF
CH1_IN
GND
SUB
+PRE
CH2_OUT2
CH2_OUT1
CH1_OUT2
CH1_OUT1
+VCC
-VCC
-PRE
IC103 STK433-070
IC302 BD3881FV
•
IC Block Diagrams
– MAIN Board –
28
RECO-L
27
NF-L
26
NF-R
25
RECO-R
24
TU-R
23
TU-L
22
CD-R
21
CD-L
20
AUX-R
19
AUX-L
18
OUT-L
17
BASS-L
16
OUT-R
15
BASS-R
BASS
BASS
13
CONT
14
VEE
12
VDD
11
TRE-R
10
TRE-L
TREBLE
TREBLE
7
VOLI-L
8
VOLI-R
9
GND
VOLUME
VOLUME
6
PBO-L
LOGIC
CONTROL
5
PBO-R
4
NF-R
1
NF-L
2
TA-L
3
TA-R
43
HCD-SX2D
IC651 uPD16315GB-3BS
– 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
44
HCD-SX2D
• IC Pin Function Description
MAIN BOARD IC501 uPD780078 (SYSTEM CONTROLLER)
MAIN BOARD IC501 uPD780078 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
MUTE1
O
Muting signal output to the VIDEO AMP (not used)
2
MUTE2
O
Muting signal output to the VIDEO AMP (not used)
3
RPHD
O
REC/PLAY control signal output
4
BIAS
O
BIAS ON/OFF control signal output
5
TSOL
O
Tape solenoid control signal output
6
TMOT
O
Tape motor control signal output
7
TCNT
O
Tape control signal output
8
VIDEO SW
I
RGB/COMPONENT select SW signal input (not used)
9
GND
—
Ground terminal
10
VDD
—
Power supply terminal (+5V)
11
STE
I
Stereo signal input
12
TUCE
O
Chip enable signal output to the tuner
13
VIDS
O
INT/PRO signal output (not used)
14
TOP
I
DVD/CD tray open SW signal input
15
VEDA
O
Chip select output to the FL driver
16
VFCK
O
Clock output to the FL driver
17
VFSTB
O
Data output to the FL driver
18
TUDI
O
Data output to the tuner
19
TUDO
I
Data input from the tuner
20
TUCK
O
Clock output to the tuner
21
RDDA
O
Strobe signal output to the tuner (not used)
22
VUP
I
Volume up input (VR601)
23
FPON
O
FL power supply control signal output
24
VDD1
—
Power supply terminal (+5V)
25
GND
—
Ground terminal
26
KEY1
I
Function key input
27
KEY2
I
Function key input
28
KEY3
I
Function key input
29
SFTY
I
AC cut detect signal input
30
HDPN
I
Tape SW (PACK, HDPLY) signal input
31
REPT
I
Tape SW (RECF, RECR) signal input
32
VER
I
Destination version setting
33
VDWN
I
Volume down input (VR601)
34
AVR
I
Reference voltage terminal
35
TCL
I
DVD/CD tray close SW signal input
36
RST
I
System reset signal input
37
XT2
I
Subclock input (36.768KHz)
38
XT1
O
Subclock output (36.768KHz)
39
IC
—
Not used
40
X2
I
Main system clock input (8.38MHz)
41
X1
O
Main system clock output (8.38MHz)
42
GND
—
Ground terminal
43
U-SENS
O
USB SENS signal output (not used)
44
INH
I
Power down detect signal input
45
REM
I
SIRES signal input from the remote control receiver
46
RDCK
O
RDCK signal output to the tuner (not used)
47
MRST
O
MPEG reset signal output
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