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Schematic Diagrams
8
8-5
Figure 8-1. A1 Main PCA (2620A/2625A) (cont)
TP3
TP4
TP6
MMBT3904
Q6
MMBT3904
Q5
C10
180PF
BAS16
CR4
VR1
1N5232
TP14
CR5
MBR140
470
C12
R12
47K
R11
47K
Q1
MMBT3906
R6
3.32K
R13
20
LM317
U6
IN OUT
ADJ
R10
4.7K
R4
10K
R14
10K
R9
4.7K
MMBT3906
Q3
MMBT3904
Q4
VR2
1N5233
Q2
MMBT3906
C9
180PF
R5
1.00K
10
C6
J3
1.0
C5
TP30
1.0
C4
BAW56
CR7
TP31
TP32
U31
LM358DT
GND VC
VIN
VSW
FB
U9
LT1170
U31
LM358DT
220
C18
220
C20
.033
C2
CR2
1N5397
CR3
1N5397
HCU04
HCU04
100
R26
D
HC74
CL
Q
Q
PR
45.3K
R30
11.0K
R31
T2
47
C26
MBRD360
CR10
4.02K
R46
LM393DT
U24
D
HC74
CL
Q
Q
PR
10K
R47
2200
C14
VCC
CR11
BAS16
R28
470
TP2
TP10
Q7
CR12
BAS16
R34
470
1000PF
C35
TP9
Q8
5.1K
R40
.1
C21
10000
C7
S1
MBRD360
CR1
C59
180PF
RT1
RXE065
TL317
U19
IN OUT
ADJ
1.30K
R44
1.0
C34
TP7
10K
R48
.047
C39
HCU04
VR4
LM385
R39
63.4K
11.0K
R41
LM393DT
U24
39K
R43
HCU04 HCU04 HCU04
R45
1.0M
10K
R42
VCC
CR13
MMBD7000
47
C31
U18
79L05
GND
OUTIN
1.0
C32
47
C30
0.02
R38
T1
CR6
MBR140
MMBD7000
CR8
CR9
MMBD7000
470
C13
TP5
R15
33
47K
R22
TP1
VEE
1N5235B
VR3
2.2
C17
INGUARD SUPPLIES
+5.6V
SH3
UNUSED
SH3
SH3
SH3
SH3
SH3
SH3
OUTGUARD SUPPLIES
INVERTER
POWER FAIL DETECTION
5VAC
SH4
SH4
SH3
SWITCHER
RAW SUPPLY
T401
1/8A SB
250V
L
N
EG
UNUSED
-5.6V
+5.2V
-5.0V
-30V
SH3
+5.1V
U22
50VU22
1%
VLOAD
50V6.8V
50V
DCHDCH
35V
25V
1%
10V
IBIAS
PFAIL*
FIL1
FIL2
1%
U23
U23
16V
U23U23U23U23
5.6V
VDD
COM
VSS
16V
COM
6.0V
SHLD
PFAIL*
1%
1%
1%
1.23V
1%
35V
DCL
DCL
50V
50V
50V
63V
VDDR
1%1%
35V
100V
1
2
3
4
5
6
7
8
10
11
12
3
2
1
8
9
10
11
12
13
1
2
3
4
5
6
1011
1213
123456 89
C1
C2
O1
O2
P1
P2
2
4
79
1
2
3
4
8
4
5
6
7
8
4
5
6
7
8
1
2
3
4
8
1
2
3
4
5
D
G
S
D
G
S
2620A-1001
(2 of 4)
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