70 Diagrams
Table 6-2. Signal Name Mnemonics
Mnemonic
Description
Mnemonic
Description
A(0)--A(15)
Address lines
MSRQ
Microprocessor service request
AD (O)--AD(7)
Address bus
NDAC
Not data accepted (GPIB)
AMB_SENSE
Ambient temperature sense
NEG_IMON
Negative current monitor
ANA(0)--ANA(7)
Analog Signal readback bus
NRFD
Not ready or data (GPIB)
ATN
Attention (GPIB)
OV
Overvoltage
BIAS_OK
15V bias supplies have stabilized
OV_CLR
Overvoltage clear
BOVPROG
BuFfered OV programming
OVCMP
Overvoltage comparator
BSTX
BuFfered secondary transmit
OVP_BIAS
Overvoltage protection bias
cc
Constant current status
OVPROG
Overvoltage programming
CCPROG
Constant current programming
OVSCR
Overvoltage SCR (crowbar)
cv
Constant voltage status
PCLR
Primary power clear
CVPROG
Constant voltage programming
PREF
Primary reference voltage (2.53V)
D(0)_D(7)
Data lines
PREF_2
Primary reference voltage (1.0V)
D101--Dl08
Data lines (GPIB)
PREN
Primary remote enable
DAV
Data valid (GPIB)
PRX
Primary receive serial data
DFI
Discrete fault indicator
PTX
Primary transmit serial data
DFI-EN
Discrete fault indicator enable
PWM_EN
Pulse width modulator enable
DPS
Downprogramming shunt
RAM
Random access memory
DN_PGM
Down programming
RDY
Ready
DRIVE_A/B
FET drive signals
REF_PWM
Reference pulse width modulator
EOI
End or identify (GPIB)
REN
Remote enable
FAC_CAL
Factory calibration
RI
Remote inhibit
FAN_PWM
Fan pulse width modulation
ROM
Read only memory
FPRX
Front panel receive serial data
SPCLR
Secondary power clear
FPTX
Front panel transmit serial data
RX
Receive serial data
FS
Fast sense
RxD
Receive Serial Data
HSRQ
GPIB service request
SA
Signature analysis
IFC
Interface clear (GPIB)
SRQ
Service request (GPIB)
IMON
Current monitor
SRX
Secondary receive serial data
INH_CAL
Inhibit calibration
STX
Secondary transmit serial data
IP
External current programming
TxD
Transmit Serial Data
IPROG
Current programming
UART
Universal asynchronous receive/transmit
ISEN
Current sense
VMON
Voltage monitor
ISRQ
Interface service request
VPROG
Voltage programming
KO(0)-KO(5)
Keypad output data bus
WR
Write
KI(0)--KI(5)
Keypad input data bus
Table 6-3. Test Points
TEST POINT No. & Loc.
Signal Tested
Measurement and Conditions
A2 GPIB BOARD
J106-4
Primary/chassis ground
Connect meter or scope common here. Make
measurements at test points 2 through 8.
U101- 1
+ 5V primary bias
+ 5V + 0.2V
U101-6
PCLR
Goes high for approximately 40 ms at power on,
then goes low.
U101-8
PCLR*
Held low for approximately 40 ms at power on,
then goes high.
U110-3
STX
Toggles between 0 and +5V.
U111-6
SRX
Toggles between 0 and +5V.
U119-4
FPRX
Toggles between 0 and +5V.
U119-18
FPTX
Toggles between 0 and +5V.
Содержание 669 A Series
Страница 2: ...Service Manual Keysight Series 669xA GPIB DC Power Supplies ...
Страница 3: ......
Страница 27: ......
Страница 56: ...Troubleshooting 53 Figure 3 15 3 Inch Front Panel Frame Assembly ...
Страница 57: ...54 Troubleshooting Figure 3 16 Assembly A10 Exploded View ...
Страница 58: ...Troubleshooting 55 Figure 3 17 Assembly A10 Exploded View 6690A ...
Страница 59: ...56 Troubleshooting Figure 3 18 Assembly A10 Exploded View 6691A 6692A ...
Страница 60: ...Troubleshooting 57 Figure 3 19 Three Phase Line Choke Subchassis Wiring ...
Страница 61: ...58 Troubleshooting Figure 3 20 24 Volt Fan Transformer ...
Страница 77: ...74 Diagrams Figure 6 1 Test Point Waveforms for Table 6 3 sheet 2 of 2 ...
Страница 79: ...Figure 6 3 A1 Front Panel Board Assembly Diagram ...
Страница 81: ...Figure 6 5 A2 GPIB Board Component Location ...
Страница 83: ...Figure 6 7 A3 FET Board Component and Test Point Location ...
Страница 87: ...Figure 6 11 A4 AC Input Board Component and Test Point Location 12 9 10 11 ...
Страница 89: ...Figure 6 13 A5 DC Rail Board Component and Test Point Location 13 14 ...
Страница 91: ...Figure 6 15 A6 Bias Board Component and Test Point Location 15 16 17 18 19 19 20 22 ...
Страница 94: ...Figure 6 17 Power Mesh Schematic Diagram All Models ...
Страница 103: ......