Read Panasonic VL-GD001RU Service Manual online
6.4. Receiving the Call Button on the Doorphone
(A) When the doorphone Call button is pressed, the bell can not be heard through the handset;
Note:
(*1) Refer to Check IC2 (P.20)
0 V
0 V
5 V
Short P1 and P2.
TPB
(Q1 Base)
TPC
(Q1 Collector)
Pin 20 of IC2
<Fig. 102>
17
VL-GD001RU
Click on the first or last page to see other VL-GD001RU service manuals if exist.