Panasonic PV-4601 A Service Manual page 29

To identify Pin 1 of the Flat Cable, a different Color Identification Line is used.
To locate Pin 1 on the Trap Connector, find the pin 1 indicator on the C.B.A.
Plug No.
P2505-P1541Unit
P3504-FE Head Unit
Location of Trap
Connectors
A/C Head
FE Head Unit
Fig. 12-1
29
Type
A
B