HT-DDW1600, STR-K1600 - Sony Audio Service Manual (repair manual). Page 13

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(1) Turn on the set.
(2) Input the following signal from Signal Generator to FM

antenna input directly.

* Carrier Frequency: A=87.5 MHz, B=98 MHz, C=108 MHz
Deviation

: 75 kHz

Modulation : 1 kHz
ANT input : 35 dBu (EMF)

Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.

(3) Set to FM tuner function and scan the input FM signal with

automatic scanning.

(4) Confirm that input Frequency of A, B and C are detected and

automatic scanning stops.

The stop of automatic scanning means “The station signal is
received in good condition.”

After press the [TUNING MODE], 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 t D1501 or R1530 problem
x=2 t D1502 problem
x=3 t D1503 problem

Connect front left speaker of the receiver and AUTO CAL micro-
phone. Turn [MASTER VOLUME] jog, there will be test tone sound
output from front left speaker, and the display will change accord-
ingly.

“AD[]-[]xxx”

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