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APPENDIX A
Access and Configuration

Internal Access

1. Remove six screws from the back cover (see Figure 9).
2. Remove the top cover.
This provides access to all internal adjustments.
3. For option card installation, slide the circuit board out toward the back to remove it from the bottom cover.
FIGURE 9. Location of screws for disassembly.
FIGURE 10. Locations of internal controls
AUX
J4B
J3B J2B J1B J1A J2A J3A
J4A
AUX
4WIRE SYSTEM 4WIRE SYSTEM
2WIRE SYSTEM
Telex Communications, Inc., Made in U.S.A.
RTN
+5V RTN
+15V -15V
-15V 0.3A
+15V 1.6A
+5V 3A
J5 POWER