Agilent Technologies 7683 User manual

Agilent 7683 Automatic Liquid Sampler
Service Manual

Agilent 7683 Automatic Liquid Sampler
Service Manual
Table of Contents
MAR 2000 i
Chapter System Overview
Modules ................................................................................................................ 2
Compatibility ....................................................................................................... 2
Sa ety .................................................................................................................... 3
Caution ......................................................................................................... 3
Warnings ....................................................................................................... 3
Chapter 2 Installation
Tray (7683 Installation Guide).................................................................
Injector (7683 Installation Guide)............................................................
Bar code reader (7683 Installation Guide)...............................................
Chapter 3 Configuration and Cabling
Connecting cabling (7683 Installation Guide) ..............................................
Cabling pinouts, 6890 GC (6890 Service Manual).........................................
Pinouts ................................................................................................................. 8
Tray connector P1, to 6850/6890 GC ......................................................... 8
Tray connector P9, to the bar code reader .............................................. 9
Tray connector J1, auxiliary ...................................................................... 9
Chapter 4 Diagnostics
Theory o operation ............................................................................................ 12
G2612A ALS Inter ace board ...................................................................... 12
6850 GC ......................................................................................................... 12
G2613A Injector ........................................................................................... 12
G2614A Tray ................................................................................................. 13

Contents
ii MAR 2000
Correcting syringe problems (7683 Installation Guide).......................
Correcting vial delivery problems (7683 Installation Guide) ..............
Fault lights (7683 Installation Guide).....................................................
Error messages (7683 Installation Guide) .............................................
Chapter 5 Replacement Procedures
Replacing the mounting post ............................................................................ 16
Replacing the G2614A Tray ............................................................................... 17
Replacing the G2613A Injector ......................................................................... 19
Replacing the G1926A Bar Code Reader ......................................................... 21
Adjusting the bar code reader position .................................................... 22
Replacing the ALS inter ace board, 6890 GC
(6890 Service Manual)...................................................................................
Replacing the needle support assembly
(7683 Installation Guide) .............................................................................
Replacing the needle guide in the support oot
(7683 Installation Guide) .............................................................................
Removing the turret (7683 Installation Guide).............................................
Turret alignment (7683 Installation Guide) ..................................................
Making a trial run ............................................................................................... 23
Chapter 6 Illustrated Parts Breakdown
ALS Inter ace Board, part no. G2612A...............................................................
Injector, part no. G2613A ................................................................................... 26
Tray, part no. G2614A ........................................................................................ 28

1
System Overview
Modules......................................................................................2
Compatibility.............................................................................2
Sa ety..........................................................................................3

2MAR 2000
Chapter
System Overview
Modules
The 7683 Automatic Liquid Sampler system, shown in Figure 1, can include:
• One G2612A ALS inter ace board (required on 6890 GC, not used on 6850 GC)
• One or two G2613A injector module(s)
• One G2614A 100 vial tray (optional, 6890 GC only)
• One G1926A Bar Code Reader (optional, 6890 GC only)–requires INET
integrator or ChemStation
Figure The 7683 Automatic Liquid Sampler system
Compatibility
A 6890 GC without the ALS inter ace board can use only the 7673 ALS.
A 6890 GC with the ALS inter ace board can use only the 7683 ALS.
The 6850 GC uses only the 7683 ALS.
Sample tray quadrant
Open injector door here
Turret
G2613A Injector
G261 A Tray

System Overview
Safety
MAR 2000 3
Safety
Be ore servicing the various components o the GC, observe the ollowing sa ety
precautions.
Caution
Follow the precautions below when servicing the instrument to avoid data loss
or damage to the instrument.
Printed circuit boards
When storing printed circuit boards (PCBs), always place them in static control
envelopes or enclosures.
Always make sure you are properly grounded (e.g., wearing an ESD strap) be ore
handling electrostatic sensitive components such as printed circuit boards.
Voltage carrying components
When disconnecting plugs, pull on the plug, not its wires. Pulling on the wires
may cause breakage.
Warnings
The ollowing are potential hazards that can cause personal injury.
Heated components
Parts o the injector may become hot. Turn o the GC oven and inlet/detector
heated zones and allow them su icient time to cool be ore servicing those areas.
I you must per orm service on components that have not ully cooled, wear
protective gloves.
Voltage carrying components
Whenever possible, disconnect the G2613A Injector and G2614A Tray rom the
GC be ore working on them.

System Overview
Safety
MAR 2000
Whenever possible, disconnect the GC rom its power source be ore working on
or near voltage carrying components o the GC.
The ollowing components carry voltage when the GC is plugged in even i the
power switch is o :
• The AC power cord
• The AC power supply
When the power to the GC is turned on, potentially dangerous voltages exist on
these additional components:
• The power trans ormer
• All electronics boards
• All internal wires and cables connected to these boards
• The injector, tray, and bar code reader cables that connect to the GC
• All internal wires, cables, and boards in the injector, tray, and bar code
reader

2
Installation
Tray .......................................................................................
Injector..................................................................................
Bar code reader ...................................................................

6MAR 2000

3
Con iguration and Cabling
Connecting cabling (7683 Installation Guide)................
Cabling pinouts, 6890 GC (6890 Service Manual)...........
Pinouts .................................................................................. 8

8MAR 2000
Chapter 3
Configuration and Cabling
Pinouts
Tray connector P , to 6850/6890 GC
Pin Signal
A1 TXD
A2 RTS
A3 DTR
A MRESET
A5 GND
A6 VAC1
A7 GND
A8 VAC2
B1 RXD
B2 CTS
B3 DSR
B GND
B5 GND
B6 VAC1
B7 GND
B8 VAC2

Configuration and Cabling
Pinouts
MAR 2000 9
Tray connector P9, to the bar code reader
Tray connector J , auxiliary
Pin Signal
1+5 VDC
2NC
3NC
RRD0 (motor)
5RRD1 (motor)
6
7GND
8RR5V
PMH1 GND
PMH2 GND
Pin Signal
1CD
2RXD
3TXD
DTR
5GND
6DSR
7RTS
8CTS
9RI
PMH1 GND
PMH2 GND

Configuration and Cabling
Pinouts
10 MAR 2000

4
Diagnostics
Theory o operation............................................................. 12
Correcting syringe problems
(7683 Installation Guide)..................................
Correcting vial delivery problems
(7683 Installation Guide)..................................
Fault lights (7683 Installation Guide)..............................
Error messages (7683 Installation Guide) ......................

12 MAR 2000
Chapter 4
Diagnostics
Theory of operation
G26 2A ALS Interface board
The ALS Inter ace board routes messages between the GC main board and the
components o the automatic liquid sampler system, and transmits power to the
injector(s) and the tray. Errors detected by the injector or the tray are routed to
this board, which then displays the error message on the 6890 GC or at the
ChemStation.
Power rom the trans ormer enters the board at J5. This voltage is partially
recti ied through hal a diode bridge be ore being transmitted to the tray and the
injector(s) at approximately 33 VAC. The other hal o the diode bridge resides
within the injector and the tray.
The ALS Inter ace board runs on +5 VDC rom the main board through P5.
One use is located on this board at F1 to protect the trans ormer rom
overvoltage.
6850 GC
The 6850 GC directly controls and powers the injector and tray. The power
circuitry is identical to that on the ALS inter ace board.
G26 3A Injector
The G2613A Injector completes the recti ication o power delivered by the ALS
Inter ace board (6890 only) or the 6850, and interprets all commands received
into the motions required to make an injection. Sensors and encoders are used

Diagnostics
Theory of operation
MAR 2000 13
on the syringe carriage, plunger, and turret to locate the position o these parts
and to control injection speed. Any errors detected are reported to the ALS
inter ace board/GC main board, which displays the error on the GC.
G26 4A Tray
The G2614A Tray consists o a platen which holds the sample vial quadrants, a
bracket, a control board, and a robotic arm assembly that manipulates and moves
the sample vials to the injector.
Hal -recti ied power to the assembly arrives through the cable to the ALS
inter ace board, along with control signals. The board within the tray completes
recti ication o the 33 VAC power input, interprets all commands, and drives the
robotic arm motors and the bar code reader.
Sensors are located within the tray and robotic arm assemblies to allow the tray
board to determine the location o the gripper and to determine whether or not
the gripper is carrying a vial.

Diagnostics
Theory of operation
1 MAR 2000

5
Replacement Procedures
Replacing the mounting post ............................................. 16
Replacing the G2614A Tray................................................ 17
Replacing the G2613A Injector .......................................... 19
Replacing the G1926A Bar Code Reader .......................... 21
Replacing the ALS Inter ace board
(6890 Service Manual)...................................................
Replacing the needle support assembly
(7683 Installation Guide) .............................................
Replacing the needle guide in the support oot
(7683 Installation Guide) .............................................
Removing the turret (7683 Installation Guide) ..............
Turret alignment (7683 Installation Guide)....................
Making a trial run ................................................................ 23

16 MAR 2000
Chapter 5
Replacement Procedures
Replacing the mounting post
The 6890 GC mounting post locations are shown below.
Figure 2 Mounting post locations
There is only one post location or the 6850 GC.
Back injector
Front post location
Front injector
Back post location