ST-HD501V - Panasonic Audio Service Manual (repair manual). Page 5

This unit is epuipped with a self-diagnostic function which, in
the event of a malfunction, automatically displays a code

indicating the nature of the malfunctions.Use this self-
diagnostic function when servicing the unit.

1. To check for correct insertion of the flat

cables

1 Match each connector with the color

(black/ white) of the connection port 
and insert until you hear a click.

2 Insert the flat cables at the back of the

unit in the order indicated. Make sure 
the white side of the cable is on your 
right side.

2. Breakage of flat cable (Check and

replace as necessary.)

3. If the problem is not corrected by items (1.) and (2.) above, this 

indicates a faulty IC.

U70CD

Check these IC's and replace as necessary.

ST-HD501V:IC701 (M30218MAA103)
SL-HD501V:IC403 (LC66358C4K97)

U70 CD: ........ Automatically displays on the tuner when a mal-

function occurs.

F61 ................ Automatically displays on the tuner when a mal-

function occurs.

Press an any operation button on the tuner.
To re-display the code, switch the power off (POWER STANDBY
button), and then switch power back on again.

If "F61" is displayed, the power will automatically be switched off. 
"F61" will be displayed for 3 seconds, and then the clock will be
displayed.
To re-display the code, switch the power on.  "F61" will be redis-
played, and then after 3 seconds the clock will be displayed and
the power will automatically switch off.

(displayed 
automatically)

A bus-line communications error has
occurred as a result of the flat cables
being inserted incorrectly, thus preventing
the system from operating.

1. If "U70CD" is displayed on the tuner, CD

player cannot be operated by remote
control.

When the power switch is switched on, it
automatically switches back off, making it
impossible to switch power on.

Faulty amplifier (SE-HD501V) output IC (IC501 or 502).
(When a DC voltage is applied to the speaker terminals.)

SPEAKER(L)
(SB-HD501V)

SPEAKER(R)
(SB-HD501V)

Connector

CD PLAYER
(SL-HD501V)

White side

CD PLAYER
(SL-HD501V)

TUNER
(ST-HD501V)

CASSETTE DECK
(RS-HD501V)

AMPLIFIER
(SE-HD501V)

CASSETTE DECK
(RS-HD501V)

TUNER
(ST-HD501V)

AMPLIFIER
(SE-HD501V)

FLAT CABLE

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