Panasonic KX-MB772CX - Page 57

KX-MB262CX/KX-MB772CXKX-MB262CX/KX-MB772CX
12.3.14.2.12.3.14.2.
DEFECTIVE ITS (IntegrDEFECTIVE ITS (Integr
ated Tated T
elephone Systemelephone System
) SECTION) SECTION
1. No handset and speakerphone transmission / reception1. No handset and speakerphone transmission / reception
Perform a signal test in thePerform a signal test in the
ITS or the NCU sectionITS or the NCU section
and locate a defective point (where the signal disappears) on each routeand locate a defective point (where the signal disappears) on each route
between the handset microphone and telephone line (sending), or between the telephone lbetween the handset microphone and telephone line (sending), or between the telephone l
ine and the handset speaker (receiv-ine and the handset speaker (receiv-
ing), or between the microphone and the telephone line (sending), or between the telephone line and the speaker (receiving).ing), or between the microphone and the telephone line (sending), or between the telephone line and the speaker (receiving).
Check the components at that point.Check the components at that point.
CHECK SHEETCHECK SHEET
(P(P
.152) is .152) is
useful for useful for
this investigation.this investigation.
2. No pulse dialing2. No pulse dialing
3. No ring tone (or No bell)3. No ring tone (or No bell)
CROSS REFERENCE:CROSS REFERENCE:
CHECK SHEETCHECK SHEET
(P.152)(P.152)
NCU SECTION (KX-MB772CX ONLY)NCU SECTION (KX-MB772CX ONLY)
(P.25)(P.25)