Fluke PM6690 Service Manual page 187

5
X50
R449
10K
R584
2 OFFCTRL
U29A
47
X22
OF F
2 5
D Q
3
X23 CLK
ON 6
Q
X24
D
R472
LVC74A
2 ONCTRL
47
C389
R478
100NF
1M
X51
R479
+5VU
220
C197
R480
100NF U29C
470
LVC74A
+5VA
+5VA
1,4,5,6 +5VA
X21 X38
-15VU
C
C488
C489
22UF-35V
100NF
- 15V
J17
6
F ROM AC/ DC
X9 X39
5
P OWE R
4
S UP P L Y +5V
3
2
+5VU
1
C490
640445-6 C491
22UF-35V
+15V 100NF
X26 X40
+15VU
C492
C493
22UF-35V
100NF
B
R616 X62 X63
820
-5.2VI
C411
R617
100NF C412
6.8K
10n
U35A
R619
2 -
Q51
1
3 + BCP51
1K
LM358
R618 R620 R621 R622 R625 R626
10K 120 120 120 120 120
-12VA
2 FANCTRL
A
+15VU
U30B U35B
6 - 6 -
U30C U35C
7 7
LM358 LM358
5 5
+ +
LM358 LM358
-12VA
5
4
+5VU
+5VU
R593
1K
R466 R453
1K 1K
R592
Q58
BC847B
1K
-15VU
Q47
BC847B
-15VU
+5VU
R570 R571
100 100
R579 R575 R576
1.5K 100 100
R580
Q56
BC807-25
3.3K R581
47
R582
10K
X2 X56
+5VU
L19
C257
4.3UH
U118
100UF-6.3V 9 8
REG
IN LX
1 4
PWM FB
R372 C258
6 10
SHDN POK
68K 22UF-6.3V
5 7
COMP PGND
R373 3 2
REF GND
MAX1927
33K
R374
C262 C263 C264
47K
680PF
220PF 100NF
R627
120
U29B
12 9
C26 D Q
11
10n
CLK
8
Q
LVC74A
4
3 2
+5VU
C393
100uF-6.3V
R594 R598 R602 R454 R455 R456 R457 R458
10 10 10 10 10 10 10 10
R595 R599 R603 R461 R462 R463 R464 R465
10 10 10 10 10 10 10 10
R596 R600 R604 R467 R468 R469 R470 R471
10 10 10 10 10 10 10 10
R597 R601 R605 R473 R474 R475 R476 R477
10 10 10 10 10 10 10 10
R450 R451
-12VA
1K 330
U123
2 4
ON/OFF GND
R459
C385 C386
2.2K
22UF-35V REG 1 22UF-35V
ADJ
6
IN/TAB
3 5
IN OUT
+5VU
LM2991S
C395
100NF
R572 R573 R574
100 100 NOT USED
R577 R578
100 100 +5VU
Q57
BCP54 C397
C405
100UF-6.3V U128
10N
9
PVIN
16
PVIN2 SW2
1
SVIN SW3
REG SW4
6
S/M
7
SHDN/SS
5
RT PGOOD
3
ITH
R488
PGND
8
SGND PGND2
R489
330K 15K
LTC3412
C400 C401
1N 100P
+15VU
Q49
BCP51
+1.8V
R498
R497
1K
10
R499
R500 10
1K R501
R503 10
Q50 R502
BC847B
2.2K
10
R504
10
+15VU
R491
2.2K
U30A
R492
2 R493
-
Q48
1
10K BCP51
3 +
2.2K
C402
C403 R494
100NF LM358
4.7UF-35V 1M R495
33K
R496 C404
10K 220UF-35V
3 2
Supply Voltages,
1
X12 X41
U126
8 1
+3.3VA 6,8
IN OUT
2
SENSE
3 6
SHDN VTAP
R482 R483
7
FB C396
REG 3.3K 3.3K
C394
10N
5 100uF-6.3V
ERROR
4
GND
LP2951CM
R486
1K
-5.2VI -5.2VI 5
R452
1K
U124
C387
22UF-35V 2 4
ON/OFF GND
R460 C388 X8 X42
3.3K 22UF-35V
REG 1
ADJ
6
IN/TAB
3 5
IN OUT -5.2VA 6
LM2991S
X10 X43
-12VA 1,4,6,8
-12VA 1,4,6,8
R446
+5VU STBYLED 2
470
R447
Q46
BC847B
2.2K
R448
680
X11 X44
U127
7 8
IN OUT
5 6
IN OUT +5VD 1,2,5,6,8
1 2
CTL FLG
4 3
GATE GND +5VD 1,2,5,6,8
MIC2505
POWERON
+1.8V +1.8V 5
+5VA
+5VA 1,4,5,6
X14 X45
L28
10
SW +3.3VD 1,2,5,6,8
11
4.3UH
14
+3.3VD 1,2,5,6,8
15
C565
R487 C398
C399
22pF
4 470K 100uF-6.3V 220UF-10V
FB
2
12
13
R490
150K
X15 X46
+15VD 5,8
X16 X47
U129
1 3
IN OUT +12VA 1,4,5,6
REG
+12VA 1,4,5,6
C406 2 4 C407
GND GND
4.7UF-35V 220UF-10V
LM2940CS-12
+15VU 1
+15VU +15VU 1
X17 X48
U130
1 3
IN OUT +12VU 6
REG
C408 2 4 C409
GND GND
4.7UF-35V 220UF-10V
LM2940CS-12
X49
J28
1
F AN
2
CONNE CT OR
176125-2
J19
F095
1
PCB 1, sheet 6(7)
D
C
B
A
Schematic Diagrams 9-41