SONY RMAV2100B
Manual de Servicio

RM-AV2100B

2. S-RAM (Learning Function) Operation Check
Connection Method :
Regulated power supply (+6V constant voltage output)

CHANNEL� VOLUME�

set

+ �

1) While pressing the VOLUME � key and the CHANNEL� key, ture ON the main power of the regulated power supply (DC +6V). (Refer to Fig. 2-1.) 2) When LEARN and 1 of the LCD display appear, remove hands from pressing the above mentioned keys. (Refer to Fig. 2-2.) 3) The display appears when the S-RAM is not defective. (The diaplay NG appears when the S-RAM is defective.) (Refer to Fig. 2-2.) 4) The display status as descrived in step 3) continues until any key is pressed. � S-RAM (IC3) is diagnosed to be free from defects when the above steps from 1) to 4) are performed correctly.

CHANNEL

VOLUME

Turn ON the regulated power supply (DC +6V)

While pressing both keys at the same time;

Fig. 2-1

LEARN

1

After a while

LEARN

NG

(NG)

(OK)

Fig. 2-2

6