Sony STR-DB780 Service Manual

12
STR-DA1ES/DB780
DSP TEST MODE
Procedure:
1. While pressing the [2CH ST] and [CINEMA STUDIO EX C] buttons, press the I/1 button to turn on the main power or press the
I/1 button to turn on the main power, then press three buttons of [ENTER], [2CH ST] and [CINEMA STUDIO EX C] simultaneously.
2. The message “DSP TEST” appears, then change into “SWP. XXXX”.
3. Each time the [>] button is pressed, the item is switched in order as follows .
Items Display Remark
SWAP SWP. XXXX NORM, ALL, C SW, SLSR (switching with jog dial)
DSP communication DSP OK or DSP ERROR
When DSP ERROR is displayed, press the
[ENTER] key will clear
error
Bass management BM. XXXX AUTO, OFF, 1 to 15 (switching with jog dial)
Main speaker cut off frequency MAIN XXX 80 Hz to 200 Hz (switching with jog dial by 10 Hz)
LFE cut off frequency LFE XXX 80 Hz to 200 Hz (switching with jog dial by 10 Hz)
Co-ef. Read address RA.12XXX Turn the jog dial to switch the read data address
Co-ef. Read data RD.XXXXXX xx Value is read data
Co-ef. Write address WA.12XXX Turn the jog dial to switch the write data address
Co-ef. Write data WD.XXXXXX xx Turn the jog dial to set the write data
SRAM RAMC XXXX OFF, EXE, NG, PASS
Total operation time TTL-XXXX xx
4 large character is hour, 2 small character is minutes
Longest power on time LNG-XXXX XX
Volume I – 50 dB time display V50-XXXX XX
Volume I – 40 dB time display V40-XXXX XX
Volume I – 30 dB time display V30-XXXX XX
Volume I – 20 dB time display V20-XXXX XX
Volume I – 10 dB time display V10-XXXX XX
Volume I 0 dB time display V00-XXXX XX
Protector count value PROT XXX 0 to 255
Fuse open count value FUSE XXX 0 to 255
EEPROM condition E-XXXXX
S RST (super reset, first time use EEPROM, test pattern corrupted)
FAIL (EEPROM read/write with microprocessor have problem)
V CHG (software version change)
D CHG (destination/model change)
CLEAR (back up data initialize)
NORM (normal AC on)
EEPROM read E-XXX-XX
First four hex code is EEPROM address
Last two hex code is EEPROM data
EEPROM super reset S.RST-YES or S.RST-NO
When S.RST-YES is displayed, press the
[ENTER] key will clear all
EEPROM data

Sony STR-DB780 Specifications

General

Type	Stereo Receiver
Total Harmonic Distortion	0.09 %
Digital inputs	2 Optical, 1 Coaxial
Weight	10.5 kg
Video inputs	composite
Video outputs	1 composite, 1 S-Video
Output Power	100 Watts (8 Ohms, 20 Hz - 20 kHz, 0.09% THD)
Signal-to-Noise Ratio	96 dB (Line in)
Input Sensitivity	150 mV (Line in)