Common parts that fail in various older PHI electronic units
This post lists common parts that fail in various PHI electronic units such as electron gun controls, analyzer controls and electron multiplier supplies. The part designations show an example of where a partial part may be used in a control. These are not necessarily the specific parts that fail.
If you need help repairing one of these units RBD provides technical support, factory repair service and loaner units.
Model Number | Part Designation | Part description |
11-010 Electron Gun Control | Q11 | 2n5401 transistor |
C1, C2 | .25MF 2500V capacitor | |
V1, V2 | 8068 Tube | |
Q3, Q5 | TIP30C transistor | |
Q4 | MJE340 transistor | |
Q1 | MJE3055 transistor | |
Q2 | TIP29 transistor | |
Q3 | SPX314-4A opto coupler | |
11-065 Ion Gun Control | U1 Error control board | 308 op amp |
Q4 Error control board | MSP3704 transistor | |
Q3 Error control board | 2N3053 transistor | |
U7 Error control board | AD2700 Voltage reference | |
U6 Getter pump board | 7400 NAND gate IC | |
U9 Raster control card | 1595 multiplier IC | |
Q12 Deflection amp board | MPSU60 transistor | |
Q6 Deflection amp board | MJ205 transistor | |
C1,C4 Deflection amp board | 60 MF 500V capacitor | |
U9 HV board 2 | 4151 VFC | |
U6 HV board 2 | SPX314-1B opto coupler | |
11-500 Analyzer Control | IC1 556 preamp module | 1009 Op amp |
T1 603882 (681) board | Modulation transformer | |
20-070A | C3, C6 Deflection board | 100MF 250V electrolytic cap |
IC3 675 +/- 15V board | 7815 regulator | |
IC4 675 +/- 15V board | 7915 regulator | |
IC3 Video processor board | LF13333 switch IC | |
Q2, 3 Deflection amplifier | MPSU10 transistor | |
Q4, 8 Deflection amplifier | MPSU60 transistor | |
20-805 Analyzer Control | D46,47 | 1N5378 Zener diode |
Q4 | TIP53 transistor | |
V1 | 8068 Tube | |
Q3 | 2n5401 transistor | |
IC8 | 101A op amp | |
IC12, 13 | 7815 regulator | |
20-620/622 Electron Gun Control | C3 | 7500 UF capacitor 75V |
C4 | 13000 UF capacitor 20 V | |
CR1,2,3 | MDA970-2 bridge rectifier | |
U14 Lens control board | DAC 3331C-14-2 | |
U24 Lens control board | AD7541 DAC | |
AR8 Lens control board | 208A op amp | |
Q3 Deflection bd 1 | MJ205 transistor | |
Q5 Deflection bd 1 | MPSu60 transistor | |
C17,C19 Deflection bd 2 | 75 UF 450V capacitor | |
F1,2,3 | 4 amp fuse slow blow pigtail | |
32-095 X-ray source control | VR6 | 3524 regulator |
VR4 | PIC 645 switching regulator | |
32-100 Electron multiplier supply | U7 | AD7541 DAC |
U1 | AM25LS2538 decoder | |
Q20 | 2N 3904 transistor | |
Q19 | 2N5337 transistor | |
32-150 | U5 | 74116 4 bit latch |
U14 | 9331-16 DAC | |
K1 | 5 kilovolt relay | |
DIGIII Ion Gauge Control | VR601 power supply bd | LM 323 regulator |
VR 602 power supply bd | LM 340T regulator | |
VR 603 power supply bd | LM 320 T regulator | |
BR 603 power supply bd | 1000V PIV 1.5amp- bridge rect. | |
C 602 power supply bd | 100uF 25V capacitor | |
C 605, 608 power supply bd | 47uf 25V capacitor | |
C 601 power supply bd | 4700 MF 16C capacitor | |
C 604 | 330 Uf 25V capacitor |
Thanks for the write up–any idea what “F.5__ 3” means on the DIGIII display?
Hello Joey,
I will see if I can find a reference to that error code, it is not listed in the DGC III manual.
PS here is a link on how to bypass the DIG III setpoints so that you can operate the system – http://www.rbdinstruments.com/blog/wp-content/uploads/2012/10/DIGIII-Setpoint-Bypass-Jumper.pdf
Hi Randy,
The correct error code is or was “F.5__E”. I was able to correct it by referring to your RBD TechSpot article “How to test an ion gauge filament”. Performed the ohm out step and discovered the burnt filament.
Thanks for the reply and RBD Techspot blog!
Great help for the problems I have with old PHI electronics!