Fluke PM6690 - Page 61

Troubleshooting 6-17
JTAG
RESET
+1.8 V
+2.5 V
+3.3 VD
X33
32 kHz
mP
B3
FLASH
SDRAM
SDRAM
ADDRESS
CONTROL
U14
U116
U13
DISPLAY PCB
FPGA
DATA LCD BUS
LCD
VOLT
U17
U15
U16
U4
U1
U2
LCD
I/O
U3
KEYBOARD
U11
TEMP
U39
IC
2
I/O
U40
INT
INT
RELAYS ETC.
INITN
DONE
PROGN
mPCLK
mPCLK
LOAD
FPGA
CLK
X29
+3.3 VD
+2.5 V
+3.3 VD
+1.8 V
+3.3 VD
+3.3 VD
+3.3 VD
22
16
16
16
32
DIN
Figure 6-20 Microprocessor, memories - startup.