MIRCOM TECHNOLOGIES LIMITED, 9500 Series: No Subscriber Line Page 51
TROUBLESHOOTING
1. PROBLEM: NO CHARACTERS DISPLAYED ON DISPLAY
ACTION: Open the door and locate the contrast control and ribbon cable on the Keypad/Display board.
Check the connecting ribbon cable. Push or plug-in into the J1 socket if necessary. Adjust the
contrast using a Phillips screw driver until the characters appear distinct.
2. PROBLEM: DOOR RELEASE NOT WORKING
ACTION: Check the door strike fuse and the power supply transformer connections . Please refer
to FIG. 18 for fuse location and FIG. 7 for wiring scheme. Check programmed keyless entry
code and door-open period.
3. PROBLEM: DIALLING THE DIGIT "9" DOES NOT RELEASE THE DOOR
ACTION: Please refer to System Adjustments, Pulse Sensitivity Adjust section for complete information.
In some older rotary "PULSE" phone, dialling the digit "0" may solve the problem.
4. PROBLEM: SYSTEM LATCHED-UP
ACTION: Reset the system by removing the power and powering it back on again (on newer boards
there is a switch to do this, located just above the terminal block, bottom right hand corner of
the 9501A and the 9502A). This action should initialize the system to normal mode. No
programmed information will be lost since the system uses a non-volatile memory that will
hold the information even. Please note: the system must be Earth Grounded properly to avoid
latch-up.
5. PROBLEM: RELAY CARD TEL. LINE NOT RESPONDING
ACTION: Check the jumper setting on the Relay Cabinet's Decoder/Mother board. Refer to FIG. 6 for
complete details. Check the power supply transformer connection and voltage on the terminal
block. Check the communication link wiring, refer to FIG. 5 for wiring information. If
necessary, repair or replace relay card.
CAUTION! Do not unplug or install any cards while the power is “on”.
Note: For further help, please call or fax:
Application Engineering Department
Tel.: (888) 660-4655
Fax: (888) 660-4113
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