Service manual

RC2000 Service Manual Chapter 3 Acceptance Test Procedure 21
Research Concepts, Inc; 10679 Widmer; Lenexa, Kansas; USA 66215 WWW.RESEARCHCONCEPTS.COM
Chapter 3 ACCEPTANCE TEST PROCEDURE
This test procedure is followed by test personnel at the factory.
1. Turn on test bench power supplies and voltmeters. Install EPROM, EPLD, and clock devices as
specified for the particular model being tested. Verify the orientations of all installed ICs.
2. Place the input voltage switch of the 2000 into the 115V position. Plug in the unit.
3. Turn on the RC2000 using the front panel circuit-breaker/power switch. Adjust the “LCD Contrast”
pot, located on the digital board near the ribbon connector J2, to obtain a readable front panel
display.
4. Install the coincell battery [Duracell DL2450] in the battery holder on the digital board.
5. Attach the ground leads from the voltmeter and power supply to the RC2000 chassis.
6. Adjust pot P2, labeled “VREF TRIM” located in the front, left corner of the digital board while
measuring the voltage at the test point labeled “VREF”. Set the voltage at 5.000 VDC.
7. On the drive board, set both the AZ_TP and EL_TP test points for voltage readings of 3.25V using
trim pots P1 AZ_CL and P2 EL_CL, respectively.
8. Set SS1 offset voltage at wiper of OFF1 pot P3 (digital board--junction with 10K Resistor R41) to
0.50 VDC using the OFF1 pot P3.
9. Set SS2 offset voltage at wiper of OFF2 pot P5 (digital board--junction with 20K Resistor R37) to
0.75 VDC using the OFF2 pot P5.
10. Adjust the power supply to 0.30V and hookup to the SS1 input (digital board--pin 1 on connector
J1). Adjust the gain pot G1 (pot P4) to obtain 3.75V at the SS_1 test point. If testing the “B” or “C”
version, go to the limits mode and note the SS1 reading. (should be about 800)
11. Adjust the power supply to 2.5V and hookup to the SS2 input (digital board--pin 2 on connector J1).
Adjust the gain pot G2 (pot P4) to obtain 3.75V at the SS_2 test point. If testing the “B” or “C”
version, go to the limits mode and note the SS2 reading. (should be about 800)
12. Verify the +12V supply (+12V +1V) on the digital board by measuring the +12V test point located in
the front-left corner of the board
Verify the +5.7V supply (+5.8V +0.5V) on the digital board by measuring the +5.7V test point
located in the back-left corner of the board.
Verify the CL circuit supply (+11.8V +0.5V) on the drive board by measuring the metal case of VR1
located in the front-right quadrant of the board near the large electrolytic capacitor.
Verify the +5V supply (+5V +0.1V) on the digital board by measuring the +5V test point located in
the front-left corner of the board.
13. Turn off the RC2000 and attach the cables to the test mount at connectors J1 and J2.
14. Turn the unit on. It should come up in limits mode. Toggle the mode key to bring up CONFIG
mode. Scroll up to RESET SYSTEM DATA” and then enter the 41758 code. IF RESET SYSTEM
DATA does not appear during the scrolling, then expert access mode must be turned on with the
41758 code. After a successful system data rest the unit should return to limits mode.
15. In limits mode press any key to continue. Set the east limit by pressing the “E” key and verifying
that the AZ count value is decreasing. Then press 7 to set the east limit. The AZ count should now