WJ-AV20 - Panasonic Provideo Service Manual (repair manual). Page 2

WJ-AV20

This service information is designed for experienced repair technicians only and is not designed for use by the
general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to
service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any
attempt to service or repair the product or products dealt with in this service information by anyone else could
result in serious injury or death.

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, 
DO NOT REMOVE COVER (OR BACK). NO USER 
SERVICEABLE PARTS INSIDE.
REFER SERVICEING TO QUALIFIED SERVICE
PERSONNEL.

This symbol warns the user that uninsuland voltage within the  
unit may have sufficient magnitude to cause electric shock. 
Therefore, it is dangerous to make any kind of contact with 
any inside part of this unit.

This symbol alerts the user that impotant literature concerning 
the operation and maintenance of this has been included.
Therefore,  it  should  be  read  carefully  in  order  to avoid 
any problems.

T

here are special components used in this equipment which are important for safety. These parts are indicated 

by the "  " mark on the schematic diagram and  the replacement parts list. It is essential that these critical 

parts should be replaced with manufacturer's specified parts to prevent x-radiation, shock, fire, or other hazards.

Do not modify the original design without permission of manufacture.

●

Remote control connector :

Rear: RJ-11 modular port, front: mini-DIN 5-conductor jack

ISDN terminating switch :

100 

Ω

termination ON/OFF

Host port, data port

RS-485 terminating SW :

ON/OFF (Set with dip switches on the rear)

Data port RS485 line changeover SW :

Straight/crossover (Set with dip switches on the rear)

Note 1: Mutual connections with Codec by other firms are not guaranteed.
Note 2: In case of no ISDN, contract additional proceedings for subscription are required. This unit does not include the DSU

(Digital Service Unit). The DSU is needed separately. The DSU to be used should be qualified as an electric communica-
tions terminal unit.

Weight and dimensions indicated are approximate.
Specifications are subject to change without notice.

Switch protector  ................................................................................... 1
Rack mount bracket  ............................................................................. 2
Mounting bracket screw (M3)  .............................................................. 6
Power cord (2.5 m) ............................................................................... 2
8-conductor modular cable (for ISDN network) (3 m)  .......................... 1
6-conductor modular cable (for host RS-485 data port) (3 m)  ............. 1

* The figures given in the quantity column are per AV Codec.