Error ROM • RAM Chip No.
Example (for HC-64)
No.1 (M
1
) out of the ROM
have "read" error.
No. 0 (M
3
) and No.1 (M
4
)
out of the C-MOS RAMs
(6264) have "read" error.
Indicate memory error.
LINK SELECT Switches set
to select No. 15
Fig. 1
Error ROM•RAM Chip No
Example (for HC-62)
No.1 (M
2
) out of the ROM
have "read" error.
No. 0 (M
3
) and No.1 (M
4
)
out of the C-MOS RAMs
(6264) have "read" error.
Indicate memory error.
LINK SELECT Switches set
to select No.15
Fig. 2
3. TROUBLE SHOOTING
3-1 Check of ROM & CMOS-RAM - No calls on the system.
1. HC-64 (when EX-630 is used)
(1) Set the "LINK SELECT" switches of the HC to F (between E and 0)
and switch on the AC power of the exchange.
(2) If there is no error, the indication lamps will not light.
(3) In the event of a memory error, the lamps may light as shown in the example
of Fig. 1.
(4) The error indications will remain on until you use Link No. 15 for com-
munications.
2. HC-62 (when EX-610 or EX-620 is used)
(1) Lift 4 Link Select switches (Link No. 15 Select) and then set the exchange
power switch to ON.
(2) The indicators remain lit if there is no error.
(3) The indicators light as shown in Fig. 2 if there is a memory error.
(4) The indicators remain lit till the link No. 15 is used for conversation.
3-2 Confirming of the CP normal working
If the CP, OC and HC are working normally, the HC's indication lamps of LINE
BUSY, LINE ADDRESS and SIGNAL CODE go out.
When any of the lamps remains lit, it is possible that any of the CIP, OC or HC
is faulty.
Check first that the CLOCK lamp of the HC is lighting, then confirm that the
CP is working normally by hearing the clicking sound of the PI unit's relay which
is produced when the relay is activated through dial operation of the paging.
If the CP is found working normally, chances are that the HC is faulty, followed
by the OC.
3-3 Check of CMOS-RAM (Programmed data memory)
You hear calling tone instead of confirmation tone, if there is CMOS memory
error at the time of initial programming and registration using station No. 200,
or at the time of registration to Single Digit Number or Personal Number or
Remote Number.
3-4 The order of link usage.
After power is on, links are used in numerical order for each communication.
Remember this to help you when problems are found with specific links.
Remarks:
1. Be sure to avoid mistake at the time of DIP switch installation and No. 200
Programming since such mistake can lead to later troubles.
2. Be sure to make "No. 200 Programming" after "Programming Data Table"
(attached to this manual) is filled out. Keep the finished "Programming Data
Table" (Initial Checking Sheet for the System) as a part of complete draw-
ings for each installation.
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