Panasonic RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT Service Manual ▷ View online
4. However, if the EEPROM was not detected, it will not display the EEPROM’s checksum information. The LCD will display micro-
p version number (as shown below) for 1 sec and return to normal Doctor Mode display.
Note:
Within the Doctor Mode display, at any of the test modes, if [STOPn] key at main set is pressed, followed by [4] and [7] key from
the remote control, the micro-p’s version number and EEPROM information will be displayed for 1 sec, and then returned to the
normal doctor mode display.
the remote control, the micro-p’s version number and EEPROM information will be displayed for 1 sec, and then returned to the
normal doctor mode display.
14.2.1. Inspection item list
Test number
Test Item
Operation key
(numeric buttons)
1
Tact SW inspection
CD, [1]
2
TONE inspection
[2],[3]
3
LCD ALL Segment inspection
[4]
4
CD Unit Loading Test
CD,[
10],[1],[0]
5
CD Unit Traverse Test
CD,[
10],[1],[1]
6
CD Unit Combination Test
CD,[
10],[1],[2]
7
CD Unit Adjustment Test
[
10],[2],[0]
8
SG2 Aging Test
TAPE, FF
9
EEPROM Checksum Check
DOCTOR mode key
10
BBD Check
TAPE,[8]
Note:
· If entering Doctor Mode by numeric buttons, PRESET EQ will be set to OFF.
· In case of error, all the segments of LCD will blink (1 sec on and off) and Doctor Mode shall be retained.
· In case of error, all the segments of LCD will blink (1 sec on and off) and Doctor Mode shall be retained.
14.2.2. CD Unit Loading Test (Reliability test 1)
· Putpose : To test CD Unit Loading (OPEN / CLOSE aging test) function.
−
−
−
− The following operation will be carried out.
· Procedures :
1. Enter into doctor mode (Refer to section 14.2)
2. Press [
1. Enter into doctor mode (Refer to section 14.2)
2. Press [
10] followed by [1] & [0] on the remote control.
33
RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
Figure 14-3
3. After a few times, the LCD shall display as below:
Special Note:
Due to certain reasons, when the following conditions occur, the aging will stop but the count value shall be maintained:
· During OPEN operation, after a certain timing, the CD does not open in the Open position. (After REST SW is OFF, the CD
Due to certain reasons, when the following conditions occur, the aging will stop but the count value shall be maintained:
· During OPEN operation, after a certain timing, the CD does not open in the Open position. (After REST SW is OFF, the CD
OPEN SW did not turn ON after 4s.)
— Do the CLOSE operation, stop the aging test at CLOSE condition.
· During CLOSE operation, after a certain timing, the CD does not close in the CLOSE position. (After CLOSE operation, REST
SW was not turned off in 4s.)
— Do the OPEN operation, stop the aging test at OPEN condition
14.2.3. CD Unit Traverse Test (Reliability test 2)
· Purpose : (Access Inner Outer Disc aging test) To test CD Unit traverse reliability.
−
−
−
− The following operation will be carried out.
· Procedures :
1. Enter into doctor mode (Refer to section 14.2)
2. Press [
1. Enter into doctor mode (Refer to section 14.2)
2. Press [
10] followed by [1] & [1] on the remote control.
34
RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
Figure 14-4
3. After a few times, the LCD will display as shown below:
Special Note :
Due to certain reasons, when the following conditions occur, the aging will stop but the count value shall be maintained:
· After 10s, the Disc Access has not yet complete.
· Out of Focus for more than 2s.
Due to certain reasons, when the following conditions occur, the aging will stop but the count value shall be maintained:
· After 10s, the Disc Access has not yet complete.
· Out of Focus for more than 2s.
14.2.4. CD Unit Combination Test (Reliability test 3)
· Purpose : This test is the combination of the CD OPEN/CLOSE operation and the Inner and Outer Disc Access operation aging
test. (Mainly used for CD unit reliability test)
−
−
−
−
− Operation : During Doctor Mode, when the keys [ 10] followed by [1] & [2] are being pressed using the remote control key,
the following operation will be carried out.
· Procedures
1. Enter into doctor mode (Refer to section 14.2)
2. Press [
1. Enter into doctor mode (Refer to section 14.2)
2. Press [
10] followed by [1] & [2] on the remote control key, the following operation will be carried out:
35
RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
Figure 14-5
3. After a few times, the LCD will display as shown below:
Special Note :
Due to certain reason, when the following conditions occur, the aging will stop but the count value shall be maintained:
· During OPEN operation, after a certain timing, the CD does not open in the OPEN position. (After REST SW is OFF, the CD
Due to certain reason, when the following conditions occur, the aging will stop but the count value shall be maintained:
· During OPEN operation, after a certain timing, the CD does not open in the OPEN position. (After REST SW is OFF, the CD
OPEN SW did not turn ON after 4s.)
· During CLOSE operation, after a certain timing, the CD does not close in the CLOSE position. (After CLOSE operation, REST
SW was not turned off in 4s.)
· After 10s, the Disc Access has not yet complete.
· Out of Focus for more than 2s.
· Out of Focus for more than 2s.
14.2.5. Cassette Aging Test (SG2)
· Purpose : To check the reliability of the SG2 mechanism.
−
−
−
− Operation: After entering the doctor mode, press [
/+ /FF] key on the main set for 2sec, it will enter the Aging Test where
the process is as below:
−
−
−
− Stop Operation: Use Stop key (main set). If stop key is pressed, aging test will stop and remain in doctor mode.
· Procedures :
1. Enter into doctor mode (Refer to section 14.2).
2. Press [
1. Enter into doctor mode (Refer to section 14.2).
2. Press [
/+ /FF] on the main unit. it will enter into the casette aging mode.
SG2 Aging Test
36
RX-ES23GC / RX-ES23GS / RX-ES23GN / RX-ES23GT
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