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13

3

connector
(CN1107)

1

connector (CN1110)

2

connector (CN1106)

5

digital board

4

two connectors
(CN402, 403)

8

SP-B board

0

SP-A board

6

STAY4 board

3

STAY3 board

qs

S-video board

5

connector (CN451)

4

connector (CN450)

7

two connectors (CN412, 413)

9

two connectors (CN410, 411)

qa

connector (CN408)

qg

connector (CN406)

ql

AU-IN board

qh

video-AU board

qj

harness (CN132)

qk

connector (CN404, 405)

2

connector (CN447)

1

connector (CN104)

qd

connector (CN407)

qf

video board

14

9

heatsink block

0

main board

8

twelve screws

2

two connectors
 (DA1000ES: CN2701, 2703/
DB790: CN2704, 2705)

1

six connectors (CN421, 401, 601, 651, 501, 420)

3

connector (CN951)

5

connector (CN423)

6

connector (CN416)

7

connector (CN409)

4

A-class board

15

All fluorescent segments are tested. When this test is activated, all
segments turn on at the same time, then each segment turns on one
after another.
Procedure:
1. While pressing the 

[DISPLAY]

 and 

[MEMORY/ENTER]

 but-

tons, press the

/1

button to turn on the main power.

2. All segments and 

[MULTI CHANNEL DECODING]

 indicator

LED turn on.

3. Turn the 

[INPUT SELECTOR]

 dial.

4. Half of segments turn on and 

[MULTI CHANNEL DECOD-

ING]

 indicator LED turn off.

5. Turn the 

[INPUT SELECTOR]

 dial once again.

6. Others half of segments and 

[MULTI CHANNEL DECODING]

indicator LED turn on.

7. Turn the 

[INPUT SELECTOR]

 dial once again.

8. All segments and 

[MULTI CHANNEL DECODING]

 indicator

LED turn off.

When this mode is used, the destination and the software version
number are displayed.
Procedure:
1. While pressing the 

[MAIN MENU]

 and 

[DISPLAY]

 buttons,

press the

/1

button to turn on the main power.

2. The message “REST 14” appears.
3. Every pressing of any button other than the

/1

button counts

down the buttons. The buttons which are already counted once
are not counted again.

4. When all buttons are pressed, the message “REST 00” appears.

All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
1. While pressing the  

[TUNING +]

 and 

[MUSIC]

 buttons, press

the

/1

button to turn ton the main power.

2. The memories are reset to the default values and the main power

turn off automatically after seven minutes.

All preset contents are reset to the default setting.
Procedure:
1. While pressing the 

[SURR BACK DECODING]

  and 

[PRE-

SET TUNING --]

 buttons, press the

/1

button to turn on the

main power.

2. The message “FACTORY” appears and the present contents

are reset to the default values.

Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Press the

/1

button to turn on the main power.

2. Turn the 

[INPUT SELECTOR]

 dial to select the “AM”

3. Press the

/1

button to turn off the main power.

4. While pressing the 

[PRESET TUNING +]

 or 

[TUNING +]

 but-

ton, press the  

/1

button to turn on the main power.

5. Either the message “9 K STEP” or “10 K STEP” appears. Se-

lect the desired step.

Procedure:
1. While pressing the 

[MEMORY/ENTER]

  button, press the

 

/1

button to turn on the main power.

2. The message “AUTO-BETICAL SELECT” appears and scans

and stores all the FM and FM RDS stations in the broadcast
area.

3. When done, the message “FINISH” appears.

The preset sound field is cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
1. While pressing the 

[MUSIC]

 button, press the

/1

button to

turn on the main power.

2. The message “SF. CLR.” appears and initialization is

performed.

All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
1. While pressing the 

[INPUT MODE]

 and 

[MEMORY/ENTER]

buttons, press the

/1

button or press the

/1

button for more

than five seconds to turn on the main power.

2. The message “INITIAL” appears and the memories are reset

to the default values.

Procedure:
1. Enter the swap mode. (Refer to the “DSP TEST MODE” (see

page16))

2. Press the  

[DISPLAY]

 button.

3. The massage “–oodB” appears. (Volume level is “MIN”)
4. Press the  

[DISPLAY]

 button once again.

5. The message “–58.0dB” appears. (Volume level is “MID”)
6. Press the  

[DISPLAY]

 button once again.

7. The massage “0.0dB” appears. (Volume level is “MAX”)

16

Procedure:
1. Press the 

/1

button to turn on the main power, then while pressing the  

[MEMORY/ENTER]

 button, press the 

[SURR BACK DE-

CODING]

 button.

2. The message “SPECIAL” appears.
3. Each time the 

[MENU]

 dial is turned clockwise, the item is switched in order as follows .

Items

Display

Remark

Destination and software

****

 XXX

****

: destination, XXX: software version

Model name

DA1000 or DB790

Never change (IF changed, INITIALIZE works every AC on)

Destination change

DES. XXXX

XXXX: destination

Command mode change

C.MODE.AV1 or C.MODE.AV2

Volgate limiter working level

V.LIM. > XX

Never change

Power control after protector on

PROT.EVER or PROT.OFF

When PROTECTOR works, system power is automatically
down after 5 sec for safety (Set “Ever On” for the servicing)

SWAP

SWP. XXXX

Switching with 

[--/+]

 dial

Bass management

BM. XXXX

AUTO, OFF, 1 to 28 (switching with 

[--/+]

 dial)

Co-ef. Read address

RA.12XXX

Turn the 

[--/+]

 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 

[--/+]

 dial to switch the write data address

Co-ef. Write data

WD.XXXXXX xx

Turn the 

[--/+]

 dial to set the write data

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

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

Not used for the servicing
When EEPROM initialization is required, perform the “all clear
mode” (see page 15)