STR-DE400 - Sony Audio Service Manual (repair manual). Page 11

11

1. While depressing the   PRESET TUNING –  and the  A.F.D.

buttons simultaneously, press the power  ?/1  button to turn
on the main power.

2. “SWP.ALL” appears. (No change while displayed.)

ADCC Factory Test mode have two stages:

1. ADCC DSP Data Line Checking
2. ADCC AUTO CAL MIC board Checking

1. When power off :

Press the three buttons   <  +  DISPLAY  +  ?/1  .
(If it doesn’t operate, please press  DISPLAY  again afetr 2
seconds.)
Afterward, press the  DIMMER  to start DCAC factory test
mode.

After press the  DIMMER  , DCAC Factory test mode will start,
below display will show:

“DCAC[][][]x”      x = 1, 2, 3
If there is error happen, below display will show:

“ERR[]SD0x”

x = 1 

→ D1112 or R1198 or C1523 problem

x = 2 

→ D1113 problem

x = 3 

→ D1114 problem

Connect front left speaker of the receiver and AUTO CAL
microphone. Turn  MASTER VOLUME  jog, there will be test tone
sound output from front left speaker, and the display will change
accordingly.

“AD[]-[]xxx”

xxx = 0 to 255 (depends on loudness of test tone)

DSP Data Line

Check

Start

Pass

Pass

Auto Cal Mic

Check

END

SPK Front Left

ADCC MIC

Receiver