Bosch Appliances LTC, 8500 21.3Video Monitor Display Checkout, 21.5No Alarm Response

Calibrate]. If using the LTC 8555 Series keyboard, refer to the User Function 1 procedure. (See Chapter 14, “User Information,” on page 38).

21.3Video Monitor Display Checkout

1.No video display on any monitor: Verify proper CPU operation as described above under Main Bay Checkout Section.

2.No video display on some monitors: Verify operational camera is selected on suspect monitors. Confirm monitor is operational. Check monitor coax connec- tions. Verify coax connection to correct monitor output on rear of main bay.

Replace video output module.

3.Poor video on monitor: Check monitor for proper termination. Check opera- tion of known good camera directly to monitor.

4.Partial or no on-screen alphanumeric display: Check user selectable bright- ness feature (via USER 5 keyboard function) and then verify alphanumeric dis- play has been enabled (via USER 6 keyboard function). Position the overlay with USER 4 function.

5.Time and Date portion of the on-screen display alternates with “?? ?? ??”, and the LED on the front panel indicates a low battery condition: Replace CPU batteries.

21.4Remote Receiver/Driver Functions Inoperative

1.All receiver / drivers and functions inoperative: Verify power LED indica- tor on Signal Distribution Unit is lit. If not, check fuses on front of main CPU bay power supply. Verify the Code LED indicator flickers when control is acti- vated by the keyboard. If not, replace Signal Distribution Unit.

2.Individual receiver/driver non-operative: Check green LED indicator on fuse bracket in receiver/driver box. This signifies that AC power is applied by the keyboard. If not, check shielded-twisted-pair cable between Signal Distribu- tion Unit and receiver/driver box. Confirm camera address setting in receiver/ driver corresponds to same camera number as selected by the keyboard. Per- form internal receiver/driver local test to verify operation of receiver/driver cir- cuitry and pan/tilt/zoom wiring.

3.AutoDome series dome cameras are not operating in a variable speed fashion: Verify CPU DIP switch 7 is selected for variable speed mode.

21.5No Alarm Response

1.No system alarms operative: Verify power LED indicator on Alarm Interface Unit is lit. If not, check fuses on front of main CPU bay power supply. Verify the Alarm LED indicator lights and the audible buzzer sounds (if enabled) only when an 'alarm' is applied to the unit. If not, replace Alarm Interface unit.

2.Individual cameras/monitors not responding when alarmed: Ensure desired cameras are properly armed on the appropriate armed monitors in the system. Verify alarming device and cable to Alarm Interface unit intact.

EN 74 Bosch Security Systems December 13, 2005