Table of Contents
Advertisement
t
KX-_-izo_
8-2. DOES NOT RECORD
I Does a voice signal appear
at pin 3 of CN9 ?
1.°
I Does a voice signal appear
at pin 1 of IC14 ?
J.o
I
heck MIC or NCU section.
(See page 125.)
Check Digital TAM UNIT.
(IC701 ~ IC703)
Check IC5, IC8 and pin 55 of
ICI.
I
8-3. DOES NOT PLAYBACK
I
oes a voice signal appear
at pin 5 of CN9 ?
YES
I Does a voice signal appear
at pin 1 of IC20 ?
YES
I Check IC12 and Speaker.
t
Check Digital TAM UNIT.
(IC701 -IC703)
Check IC20, IC21, Q18,
IC10 and IC1.
8-4. ICM CONTINUES TO RECORD AFTER THE CALLER ON-HOOK
When the caller on-hook, this unit can detect the following 4 signal types.
A. CPC pulse
B. Dial tone or other continuous tones
C. Silence
D. Cyclic signals
A. Check CPC DETECTION CIRCUIT.
B. C.,D.
Check VOX DETECTION
CIRCUIT.
8-5. REMOTE CONTROL DOES NOT WORK/RESPONSE
IS POOR
The following are considered as the cause of no remote reception:
A. Is the ID code the same as set on the unit ?
B. The send signal interferes with the remote signal, causing the remote signal at the line output from circuit to be distored.
C. Excessive loss in telephone line.
A. Check the ID code of the unit.
B. Check NCU section.
C. Test on known telephone line to be working properly.
• If all of the above check are N.G., check the remote signal detection circuit.
-61 -
Advertisement
Chapters
Table of Contents
