Panasonic KX-TG6551CAM Service Manual page 40

KX-TG6551CAM/KX-TGA650RUM/KX-TGA651RUM
9.1.10. Bell Reception
9.1.10.1. Base Unit
When bell signal is coming, is there bell sound
signal at BBIC (IC501: 59)?
YES
When bell signal is coming, is there bell sound
signal at IC501 (29, 31)?
9.1.10.2. Handset
When bell signal coming, is there bell sound signal
at BBIC (IC1: 31, 29)?
YES
When bell signal coming, is there bell sound signal
at SP+, SP- ?
YES
Does the bell sound from SPEAKER?
Cross Reference:
Telephone Line Interface (P.12)
Check Link (P.31)
How to Check the Handset Speaker or Receiver (P.63)
NO
Check around R111, R112, R113, R114, Q111,
D113, C111, C112,
NO
Check around L474, L475.
NO
Check around SP+, SP- .
NO
Check cable of SPEAKER and resistance value
of SPEAKER.
40