Panasonic SA-PM23P / SA-PM23PC Service Manual ▷ View online
8 Self diagnosis and special mode setting
This unit is equipped with features of self-diagnostic & special mode setting for checking the functions & reliability.
8.1. Special Mode Table
Below is the various special modes for checking:-
Item
FL Display
Key Operation
Mode Name
Description
Front Key
Self -Diagnostic
Mode
To
enter
into
self
diagnostic checking for
main unit.
main unit.
1.
Select [
] for CD mode (Ensure no
tape or CD inserted).
2.
Press and hold [
]button for 2
seconds follow by [
].
To exit, press
button on main
unit or remote control.
Doctor Mode
To enter into Doctor
Mode for checking of
various items and
displaying EEPROM and
firmware version.
(For more information,
refer to section 8.1.2)
Mode for checking of
various items and
displaying EEPROM and
firmware version.
(For more information,
refer to section 8.1.2)
Note: The micro-
processor version as
shown is an example. It
will be revise when there
is an updates.
processor version as
shown is an example. It
will be revise when there
is an updates.
1.
2.
The Check Sum of EEPROM and firmware
version will be display for 1 sec.
version will be display for 1 sec.
* ROM correction
** Firmware version No:
** Firmware version No:
In any mode:
1.
1.
Press [
] button on main unit follow
by [4] and [7] on remote control.
To exit, press
button on main
unit or remote control.
FL Display Test To
check
the
FL
segments
display
(All
segments will light up)
In doctor mode:
1.
1.
Press [DIMMER] button on remote control.
To exit, press
button on main
unit or remote control.
CD to Tape
Recording Test
Mode
To Inspect the recording
process from CD to
TAPE for the unit.
(For more information,
refer to section 8.1.3)
In doctor mode:
1.
1.
Press [4] button on remote control.
To exit, press
button on main
unit or remote control.
Tape Recording
and Playing
To Inspect the Tape
recording and playing is
process for unit.
(For more information,
refer to section 8.1.4)
In doctor mode:
1.
1.
Press [5] button on remote control.
To exit, press
button on main
unit or remote control.
Tape Eject test
To check on the tape
eject function.
In doctor mode:
1.
1.
Press [6] button on remote control.
To exit, press
button on main
unit or remote control.
Volume Setting To Forced Volume
Setting.
1.
2.
3.
In doctor mode:
1.
1.
Press [7] button on remote control.
2.
Press [8] button on remote control.
3.
Press [9] button on remote control.
To exit, press
button on main
unit or remote control.
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SA-PM23P / SA-PM23PC
Item
FL Display
Key Operation
Mode Name
Description
Front Key
Traverse Test
To
determine
the
reliability of CD unit.
In doctor Mode:
1.
1.
Press [
], [1], [2] button on remote
control.
To exit, press
button on main
unit or remote control.
TPS
To check FF TPS for
deck.
(For more information,
refer to section 8.1.5)
deck.
(For more information,
refer to section 8.1.5)
In doctor mode:
1.
1.
Press [
] button on remote
control.
To exit, press
button on main
unit or remote control.
Cold Start
To activate cold start ipon
next AC power up.
next AC power up.
In doctor mode:
1.
1.
Press [SLEEP] button on remote control.
To exit, press
button on main
unit or remote control.
8.1.1. Cassette Mechanism Self-Diagnostic Mode
Below is information of the checking of cassette deck mechanism
No.
Operation Procedures
Micon operation & processing
1
C-mecha Abnormal Detection shall be
executed for DECK.
executed for DECK.
Check that all DECK mechanism leaf SW is in OFF state.
2
[
] key is pressed, after loading in a
NORMAL type cassette with the recording tab
on the left side removed.
on the left side removed.
FF shall be executed for 2 sec, after which STOP.
Check the following.
{ F.REC INH SW } is OFF
{ HALF SW } is ON
Reel pulse toggles between H & L.
Check the following.
{ F.REC INH SW } is OFF
{ HALF SW } is ON
Reel pulse toggles between H & L.
3
[
] key is pressed, after loading a
NORMAL, CrO2, METAL type cassette with
the recording tab on the right side removed.
the recording tab on the right side removed.
REW shall be executed for 2 sec, after which STOP.
Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
Reel pulse toggles between H & L.
Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
Reel pulse toggles between H & L.
4
[TAPE
] Key is pressed, after loading in a
NORMAL, CrO2, METAL type cassette (
cassette for TPS checking purposes and with
both recording tabs intact ).
cassette for TPS checking purposes and with
both recording tabs intact ).
TPS operation is executed. Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
TPS signal changes.
After checking TPS, it shall STOP.
If TPS checking is completed at TAPE END, it is considered as TPS
abnormal.
{ F.REC INH SW } is ON
{ HALF SW } is ON
TPS signal changes.
After checking TPS, it shall STOP.
If TPS checking is completed at TAPE END, it is considered as TPS
abnormal.
5
[REC] key is pressed, after loading in a
NORMAL type cassette ( with both recording
tabs intact )
NORMAL type cassette ( with both recording
tabs intact )
REC operation shall not be executed.
Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
Check the following.
{ F.REC INH SW } is ON
{ HALF SW } is ON
6
Self-diagnostic mode is stopped by pressing
the [n] Key.
the [n] Key.
LCD shall display the abnormality item code, when the STOP key is pressed,
it shall display the abnormality item code in the following sequence.
[ TEST H 0 1] [ TEST H 0 2] [ TEST H 0 3]
it shall display the abnormality item code in the following sequence.
[ TEST H 0 1] [ TEST H 0 2] [ TEST H 0 3]
7
To clear all the abnormalities in the memory,
press the [n] Key for more than 5 Sec while
the self-diagnostic mode is stopped.
press the [n] Key for more than 5 Sec while
the self-diagnostic mode is stopped.
At this time, all the abnormalities item in the memory is cleared and is
displayed on the LCD.[ C L E A R ] display for 1 Sec. then,[ TEST ] is
displayed.
displayed on the LCD.[ C L E A R ] display for 1 Sec. then,[ TEST ] is
displayed.
8
To cancel the self-diagnostic mode press the
Key.
POWER is OFF.At the next POWER ON, normal operation shall be executed.
· If RAM check error occurs during microcomputer reset, COLDSTART shall be executed and all the error memory shall be
cleared during RAM initialization.
8.1.2. EEPROM Checksum (ROM correction)
Purpose : To check for micro-processor firmware version & EEPROM check (ROM correction).
Below is the procedures for this mode.
Step 1: Enter into Doctor mode (For more information refer to section 8.1 on key operation to enter into this mode.
Step 2: Check for firmware version & EEPROM checksum.
· When entering into DOCTOR MODE the firmware version & checksum of EEPROM (if applicable) will appear on FL display.
Below is the procedures for this mode.
Step 1: Enter into Doctor mode (For more information refer to section 8.1 on key operation to enter into this mode.
Step 2: Check for firmware version & EEPROM checksum.
· When entering into DOCTOR MODE the firmware version & checksum of EEPROM (if applicable) will appear on FL display.
Below is information on the EEPROM IC (Rom correction) under 3 examples:
1. When EEPROM IC is detected and there is no ROM correction:
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SA-PM23P / SA-PM23PC
2. When EEPROM IC is detected and has ROM correction:
3. When EEPROM IC is detected and has ROM correction but NG:
Note: Micro-processor firmware version refers to version No. (Eg.MS079_12) for micro-processor IC.
It is subject to change which would update accordingly.
· Rom correction checksum refers to the hex code that is display upon key buttons pressed if an EEPROM is loaded in the unit.
It is subject to change which would update accordingly.
· Rom correction checksum refers to the hex code that is display upon key buttons pressed if an EEPROM is loaded in the unit.
(Main P.C.B)
8.1.3. CD to Tape Recording Inspection
Purpose : To check the recording function from CD to Tape.
Below is the procedures for this mode.
Procedure :
Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)
Step 2: Insert CDT-018 (Ensure TOC is completed) to CD unit before proceeding.
Step 3: Press [4] button on remote control. Enter into CD to Tape Test mode. (During this mode, volume is set to [VOLUME 50],
Bass & Treble is set to 0dB & EQ is switch off).
Note : When in CD to Tape Recording Test mode, the following process is perform :
a) Deck will rewind to start point (point at the start of recording) & Stop.
b) Recording begins (at constant analogue recording speed) for 3 seconds & Stop.
· However, “Error” would be display if there is no tracks to access to, no tape inserted, no test CD inserted or when the tape
Below is the procedures for this mode.
Procedure :
Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)
Step 2: Insert CDT-018 (Ensure TOC is completed) to CD unit before proceeding.
Step 3: Press [4] button on remote control. Enter into CD to Tape Test mode. (During this mode, volume is set to [VOLUME 50],
Bass & Treble is set to 0dB & EQ is switch off).
Note : When in CD to Tape Recording Test mode, the following process is perform :
a) Deck will rewind to start point (point at the start of recording) & Stop.
b) Recording begins (at constant analogue recording speed) for 3 seconds & Stop.
· However, “Error” would be display if there is no tracks to access to, no tape inserted, no test CD inserted or when the tape
erasure prevention tab for FWD side is not suitable for recording.
· When in this mode, if
button is pressed the process will stops automatically.
8.1.4. Tape Recording and Playing
Purpose : To check the Tape function.
Assuming the recording to TAPE has been done in test 3, only playing TAPE is made.
Below is the procedures for this mode.
Procedure :
Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)
Step 2: Press [5] button on remote control. Enter into Tape recording Test mode. (During this mode, Tape function is set to
automatically, volume is set to [VOLUME 50], Bass & Treble is set to 0dB & EQ is switch off).
Step 3: FWD play is made for 3 seconds after setting the above-mentioned, TAPE is stopped 3 seconds later. Tape should open.
Note : When in CD to Tape Recording Test mode, the following process is perform :
a) If the erasure prevention tab for FWD side the tape is broken, it is judged as an error and the recording operation does not start.
b) If tape stops by detecting a tape end while recording, it becomes an error.
Assuming the recording to TAPE has been done in test 3, only playing TAPE is made.
Below is the procedures for this mode.
Procedure :
Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)
Step 2: Press [5] button on remote control. Enter into Tape recording Test mode. (During this mode, Tape function is set to
automatically, volume is set to [VOLUME 50], Bass & Treble is set to 0dB & EQ is switch off).
Step 3: FWD play is made for 3 seconds after setting the above-mentioned, TAPE is stopped 3 seconds later. Tape should open.
Note : When in CD to Tape Recording Test mode, the following process is perform :
a) If the erasure prevention tab for FWD side the tape is broken, it is judged as an error and the recording operation does not start.
b) If tape stops by detecting a tape end while recording, it becomes an error.
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SA-PM23P / SA-PM23PC
c) If STOP key is pressed while recording or playing, the operation shall be terminated by stopping TAPE. In this case, the doctor
mode is not released.
d) DMT is output with the same timing as usual.
mode is not released.
d) DMT is output with the same timing as usual.
8.1.5. TPS Inspection
Purpose : To check the TPS.
Below is the procedures for this mode.
Procedure :
Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)
Step 2: Press [
Below is the procedures for this mode.
Procedure :
Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)
Step 2: Press [
] button on remote control. Enter into TPS Test mode. (During this mode)
· Software will start checking for existence of cassette in Deck.
· If the Deck does not contain any cassette, it shall end the test and displays the result of the test.
· The test will start by playing the Deck in forward direction for 1 sec and then FF TPS.
· If TPS signal is OK, the Deck shall be ejected. Below is information on the TPS under 3 examples.
· If the Deck does not contain any cassette, it shall end the test and displays the result of the test.
· The test will start by playing the Deck in forward direction for 1 sec and then FF TPS.
· If TPS signal is OK, the Deck shall be ejected. Below is information on the TPS under 3 examples.
1. If ERROR Flag is set "ERROR" shall be displayed. TPS check result shall not be shown in this case.
2. If Deck TPS check = OK
3. If Deck TPS check = NG
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SA-PM23P / SA-PM23PC
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