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Circuit Diagrams and PWB Layouts
SSB: DC-DC Converter
1
2
DC-DC CONVERTER
SUPPLY
3251
I264
1251
F251
1
1R0
2
F252
4251
3
F253
RES
+12V
4
A
5
NC
F254
6
F255
+5V
7
8
NC
9
F257
10
11
NC
1252
+9V_STBY_PDP
1
2
3
for ITV only
B
C
+12VUNREG
D
3139 123 5867.2
1
2
LC4.6U AA
7.
3
4
+8V6
5251
+12VUNREG
F258
5252
TO/FROM 1M20 OF HERCULES
+5V2
4255
A3
+5V2_RELAIS_IO2
(PDP)
A3
2255
5257
10p
5258
(LCD)
(PDP)
(LCD)
I251
5259
(PDP)
I252
I253
6259
2262
3259
3260
2261
47u 16V
SS14
10K
6K8
RES
5262
6262
10u
I254
SS24
7262
L5973D
2263
2264
10u
10u
3
2
NC
SupplyGnd
SupplyGnd
SupplyGnd
3
4
37
5
6
+12VUNREG
6270
BZX384-C8V2
+12VSW
I261
3270
2K2
I262
3271
2271
820R
10n
7260
LF33CPT
1
5
IN
OUT
2
4
CTRL NC
NC
COM
I255
NC
Φ
VCC
VREF
5267
I256
1
OUT
INH
I257
33u
5
FB
6267
SYNC
I258
SS36
4
COMP
GND GND_HS
SupplyGnd
2265
2266
220p
22n
I259
SupplyGnd
SupplyGnd
SupplyGnd
3266
4K7
SupplyGnd
SupplyGnd
5
6
7
8
+3V3STBY
3273
3274
220K
22K
F259
POWER_DOWN
A2
A5
7272
A7
I263
BC847BW
7271
BC847BW
F260
+3V3STBY
5268
I260
10u
3267
2268
2269
16V
16V
5K6
470u
470u
1%
SupplyGnd
3268
3K3
1%
E_14710_077.eps
7
8
1251 A1
I258 D5
1252 B1
I259 D5
2251 A2
I260 D7
2252 A2
I261 A6
2253 A3
I262 A6
2254 A2
I263 A6
2255 B2
I264 A2
2261 C4
2262 C4
2263 D3
2264 D4
2265 D5
A
2266 D5
2268 D7
2269 D7
2271 B6
3251 A2
3259 C2
3260 C3
3266 D5
3267 D6
3268 D6
3270 A6
3271 B6
3273 A7
B
3274 A7
4251 A2
4255 B2
5251 A2
5252 A2
5257 B3
5258 B3
5259 B3
5262 C3
5267 D6
5268 D7
6259 C3
C
6262 C3
6267 D6
6270 A6
7260 B4
7262 C4
7271 B7
7272 A7
F251 A1
F252 A1
F253 A1
F254 A1
F255 A1
F257 A1
D
F258 A4
F259 A7
F260 B7
I251 B3
I252 B4
I253 C4
I254 C3
I255 C4
I256 D5
I257 D5
130804
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