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13

5.2.

Disc Information

14

6 Self Diagnostic and Doctor Mode Setting

This unit is equiped with features of self diagnostic & doctor mode setting for checking the functions & reliability.

6.1.

Self Diagnostic Mode

6.1.1.

Self Diagnostic Table

6.1.2.

Self Diagnostic Error Code 1 (For CD)

6.1.3.

Self Diagnostic Error Code 2 (For Power Supply)

Self Diagnostic Mode

To enter into self diagnostic 
checking

1. Select CD mode
    (Ensure no CD inserted).

2. Press and hold [    ] for 
    2 seconds follow by [      /+] on
    main unit.

   To exit, press [TAPE/OFF] on 
   main uint.

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Error code information

Error code will display

Example:

System will perform a check on
any unusual/error code from the 
memory

1. In self diagnosis mode.

2. Press [STOP] for on main unit.

   To exit, press [TAPE/OFF] on 
   main uint.

H15

CD Open SW 
Abnormal

During normal operation CD OPEN 
SW On fail to be detected with 4 
sec. Error No. shall be clear by 
force or during cold start.

F15

CD REST SW 
Abnormal

CD traverse position intial setting 
operation failsafe counter (1000 
ms) waiting  for REST SW to turn 
on.  Error No. shall be clear by 
force or during cold start.

F26

Communication 
between CD servo 
LSI and micro-p 
abnormal.

CD function DTMS command, after 
system setting, If SENSE = 'L' 
cannot be detected. Memory shall 
contain F26 code. After Power on, 
CD function shall continue, error 
display shall be "NO DISC".
Error No. shall be clear by force or 
cold start.

For CD Mechanism Unit 
(DLS6F) (For Traverse).
Press [    ] on main unit 
for next error

For CD Mechanism Unit 
(DLS6F) (For Traverse).
Press [    ] on main unit 
for next error

For CD Mechanism Unit 
(DLS6F) (For Traverse).
Press [    ] on main unit 
for next error

U01

Battery Low

Detect the Battery when Battery is 
Low.

F76

Abnormality in the 
output voltage of 
stabilized power 
supply

In normal operation when DCDET1 
is detected "L" (Low) for two 
consecutive times, F76 is 
displayed on FL for 1 second and 
after that PCONT will be turned to 
"L" (Low). This is due to any of the 
DC voltages (+9V, +7V, -7V, +5V, 
+5.3V etc.) not available.

For Power.
Press [    ] on main unit 
for next error

For Power.
Press [    ] on main unit 
for next error

15

6.2.

Doctor Mode 

6.2.1.

Doctor Mode Table 1

To enter into Doctor Mode for 
checking of various items and 
displaying EEPROM and firmware 
version.

Note: The micro-processor 
version as shown is an example. 
It will be revise when there is an 
updates.

FL Display sequence 
Display 1 > 2

Doctor Mode

In any mode:
1. Press and hold [    ] on main
    unit follow by [4] and [7] on
    remote control.

   To exit, press [TAPE/OFF] on 
   main uint.

(Display 1)

Version Display

(DEC)

Checksum

(HEX)

(a) If there is NO EEPROM header 
string OR
(b) If there is no EEPROM ( no data is 
received by micro-processor) [NO] is 
displayed.

If the version of the EEPROM does not 
match or not working properly [NG] is 
display.

(Display 2)

Checksum : (Condition 1)

Version Display

(DEC)

Check sum

(HEX)

Checksum : (Condition 2)

If the EEPROM version matches, 
checksum [YYYY] is displayed.

The Checksum of EEPROM and 
firmware version will be display for 2 
sec.

Checksum : (Condition 3)

16

6.2.2.

Doctor Mode Table 2

The counter will increment by one.

When reach 9999999 will change to 

0000000

To check the FL segments display 
(All segments will light up)

FL Display Test

In Doctor Mode:
1. Press [AUTO OFF] on remote 
    control.
To cancel, press [0] on remote 
    control.
To exit, press [TAPE/OFF] on main 
uint.

To check for volume setting during 
this mode, Bass & treble is set to 
0dB & EQ is switch off.

Volume Setting

In Doctor Mode:
1. Press [7] on remote control.
To exit, press [TAPE/OFF] on main 
uint.

In Doctor Mode:
1. Press [8] on remote control.
To exit, press [TAPE/OFF] on main 
uint.

In Doctor Mode:
1. Press [9] on remote control.
To exit, press [TAPE/OFF] on main 
uint.

To determine the reliability of CD 
Loading unit.
To check for the Open/Close 
operation for the CD loading unit. 
It fails when there is abnormality 
in opening or closing.

CD Loading Test Mode 
(DLS6F)

In Doctor Mode:
1. Press [  10], [1], [1] on remote 
    control.
To exit, press [TAPE/OFF] on main 
uint.
(Refer to section 6.2.3. for more 
information).

To activate cold start upon next 
AC power up.

Cold Start

In Doctor Mode:
1. Press [SLEEP] on remote 
    control.
To exit, press [TAPE/OFF] on main 
uint.

The counter will increment by one.

When reach 9999999 will change to 

0000000

The counter will increment by one.

When reach 9999999 will change to 

0000000

To check for the traverse unit 
operation. In this mode, the first & 
last track is access & read. (TOC). 
It fails when TOC is not completed 
by IOS or the traverse is out of 
focus.

CD Traverse Unit Test 
Mode (DLS6F)

In Doctor Mode:
1. Press [  10], [1], [2] on remote 
    control.
To exit, press [TAPE/OFF] on main 
uint.
(Refer to section 6.2.4. for more 
information).

A combination of CD loading & 
traverse unit test.

CD Combination Test 
Mode (DLS6F)

In Doctor Mode:
1. Press [  10], [1], [3] on remote 
    control.
To exit, press [TAPE/OFF] on main 
uint.
(Refer to section 6.2.5. for more 
information).

The following shall be displayed 
for 2.5 secs. The result shall 
correspond to the condition met 
as shown.

Display of auto adjustment result

CD Self-Adjustment 
(AJST) Result Display

In Doctor Mode:
1. Press [  10], [1], [4] on remote 
    control.
To exit, press [TAPE/OFF] on main 
uint.