Sony HCD-RG30 / MHC-DX20 / MHC-RG30 Service Manual ▷ View online
15
HCD-DX20/RG30
[Aging Mode]
This mode can be used for operation check of CD section and tape deck section.
• If an error occurred:
This mode can be used for operation check of CD section and tape deck section.
• If an error occurred:
The aging operation stops and display status.
• If no error occurs:
The aging operation continues repeatedly.
1.
Operating method of Aging Mode
Turn on the main power and select “CD” of the function.
1) Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF.
2) Load the tapes recording use into the decks A and B respectively.
3) Press three buttons x , ENTER , and
1) Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF.
2) Load the tapes recording use into the decks A and B respectively.
3) Press three buttons x , ENTER , and
DISC SKIP EX-CHANGE simultaneously.
4) Aging operations of CD and tape are started at the same time.
5) To exit the aging mode, perform [MC Cold Reset].
5) To exit the aging mode, perform [MC Cold Reset].
3. Aging Mode in CD section
1) Display state
• No error occurs
1) Display state
• No error occurs
Note:
[*][*][*][*] : Number of aging operations
[*][*][*][*] : Number of aging operations
Error display
E
** s ## $$ %%
1 2 3 4 5
1 2 3 4 5
• When the buttons x , ENTER and DISC 1 are pressed simultaneously, number of time of the mechanism error and the NO DISC error
can be checked.
Display:
Display:
EMC**EDC**
**:
Number of times of error (Maximum three times)
EMC: Mechanism error
EDC: NO DISC error
EDC: NO DISC error
• When aging operation is complete, be sure to perform the MC Cold Reset to reset the error history.
D: No disc error
01: FOCUS ERROR
02: GFS ERROR
03: SETUP ERROR
02: GFS ERROR
03: SETUP ERROR
01: NO DISC judgment without chucking retry
02: NO DISC judgment after chucking retry
02: NO DISC judgment after chucking retry
Status at the time of NO DISC judgment
(High order digits only)
1:
(High order digits only)
1:
STOP
2:
SETUP
3:
TOC READ
4:
ACCESS
5:
PLAY BACK
6:
PAUSE
7:
MANUAL SEARCH (PLAY)
8:
MANUAL SEARCH (PAUSE)
AGING[*][*][*][*]
1
**
2
s
3
##
4
$$
5
%%
M: Mechanism error
Don’t care
High order digits only
D: Stopped during closing due to problems other than mechanism.
E: Stopped during opening due to problems other than mechanism.
C: Stopped during chucking due to problems other than mechanism.
F: Stopped during EX-opening due to problems other than mechanism.
D: Stopped during closing due to problems other than mechanism.
E: Stopped during opening due to problems other than mechanism.
C: Stopped during chucking due to problems other than mechanism.
F: Stopped during EX-opening due to problems other than mechanism.
Emergency related errors (High order digits only)
1:
1:
Stopped during chuck-up
2:
Stopped during chuck-down
3:
Time out by EX-OPEN
5:
Time out by EX-CLOSE
The error No. 00 indicates the newest error. As the error No. increases, it means the older error.
When you want to retrieve the error history, press the PLAY MODE button in the case of mechanism error.
Or press the REPEAT button in the case of NO DISC error.
When you want to retrieve the error history, press the PLAY MODE button in the case of mechanism error.
Or press the REPEAT button in the case of NO DISC error.
Display
16
HCD-DX20/RG30
2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1)
In the aging mode, the program is executed in the following
sequence.
(1)
The disc tray opens and closes.
(2)
The mechanism accesses DISC 2 and makes an attempt to
read TOC. However, since there are no discs, a message
“CD2 NO DISC” appears.
read TOC. However, since there are no discs, a message
“CD2 NO DISC” appears.
(3)
The mechanism accesses DISC 3 and a message “CD3 NO
DISC” appears.
DISC” appears.
(4)
The disc tray turns to select a disc1.
(5)
A disc is chucked.
(6)
TOC of disc is read.
(7)
The pickup accesses to the track 1, and playing 2 seconds.
(8)
The pickup accesses to the last track, and playing 2 seconds.
(9)
Every time when an aging operation of step 1 to step 8 is
complete, the display “AGING[*][*][*][*]” value increases
as the number of aging operations is counted up.
complete, the display “AGING[*][*][*][*]” value increases
as the number of aging operations is counted up.
(10) Returns to step 1.
3. Aging Mode in Tape Deck section
1) Display state
• No error occurs
1) Display state
• No error occurs
Display action now
• Error occurred
Display action last time
2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) Rewind is executed up to the top of tape A and B.
(2) A tape on FWD side is played for 2 minutes.
(3) FF is executed up to either made for 20 second or the end of
In the aging mode, the program is executed in the following
sequence.
(1) Rewind is executed up to the top of tape A and B.
(2) A tape on FWD side is played for 2 minutes.
(3) FF is executed up to either made for 20 second or the end of
tape.
(4) B tape is reversed, and the tape on REV side is played for 2
minutes.
(5) Rewind is executed up to the top of tape.
(6) Returns to step 2, and repeat steps from 2 to 5.
(6) Returns to step 2, and repeat steps from 2 to 5.
[Function Change Mode]
* elect either VIDEO or MD of the external FUNCTION input.
* elect either VIDEO or MD of the external FUNCTION input.
Procedure:
1.
1.
Turn on the power.
2.
Press the two buttons MD (VIDEO) and ?/1 at the same
time.
The main power is turned on and the other function of the
previous function is selected and displayed. “MD” or
“VIDEO”.
time.
The main power is turned on and the other function of the
previous function is selected and displayed. “MD” or
“VIDEO”.
NO. Display action
Action contents
Final timing
1
TAPE A AG-6
Rewind the TAPE A
The top of tape
TAPE B AG-1
Rewind the TAPE B
2
TAPE A AG-2
FWD play the TAPE A
2 minutes playing
3
TAPE A AG-3
F.F. the TAPE A
20 second FF or the end
of tape
of tape
4
TAPE A AG-4
REV play the TAPE A
2 minutes playing
5
TAPE A AG-5
Rewind the TAPE A
The top of tape
6
TAPE B AG-2
FWD play the TAPE B
2 minutes playing
7
TAPE B AG-3
F.F. the TAPE B
20 second FF or the end
of tape
of tape
8
TAPE B AG-4
REV play the TAPE B
2 minutes playing
9
TAPE B AG-5
Rewind the TAPE B
The top of tape
17
HCD-DX20/RG30
SECTION 5
ELECTRICAL ADJUSTMENTS
FM Tuned Level Adjustment
Procedure:
1.
1.
Supply a 98 MHz signal at 28 dB from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Adjust RV101 to the point (moment) when the TUNED
indicator will change from going off to going on.
indicator will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
Procedure:
1.
1.
Supply a 98 MHz signal at 60 dB from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Measure voltage between pin 21 and pin 23 of IC 101. Adjust
T101 ubtil the voltage becomes 0 V.
T101 ubtil the voltage becomes 0 V.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] Component side
FM RF Signalgenerator
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75
Ω
open)
FM ANTENNA terminal
(TM101)
(TM101)
set
FM RF Signalgenerator
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Ω
open)
FM ANTENNA terminal
(TM101)
(TM101)
set
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M
3. Use an oscilloscope with more than 10M
Ω impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
following checks.
S-Curve Check
Procedure :
1. Connect oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (D GND) by lead wire.
4. Turn Power switch on.
5. Load a disc (YEDS-18) and actuate the focus search. (In
1. Connect oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (D GND) by lead wire.
4. Turn Power switch on.
5. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
6. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 4
within 4
±1 Vp-p.
7. After check, remove the lead wire connected in step 2 and 3.
Note : • Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (D GND) by lead wire.
3. Turned Power switch on.
4. Load a disc (YEDS-18) and playback.
5. Confirm that oscilloscope waveform is clear and check RF signal
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (D GND) by lead wire.
3. Turned Power switch on.
4. Load a disc (YEDS-18) and playback.
5. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
6. After check, remove the lead wire connected in step 2.
BD board
Oscilloscope
TP(FEO)
TP(VC)
TP(VC)
symmetry
S-curve waveform
within 4
±1Vp-p
A
B
TP(RF)
TP(VC)
TP(VC)
BD board
oscilloscope
T101
RV661
RV101
IFT101
T102
RV661:TAPE SPEED
T101:NULL
RV101:FM TUNED LEVEL
18
HCD-DX20/RG30
Note : Clear RF signal waveform means that the shape “
◊ ” can be clearly
distinguished at the center of the waveform.
E-F Balance (1 Track jump) Check
Procedure :
1. Connect oscilloscope to TP (TEO) and TP (VC).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the gG button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
1. Connect oscilloscope to TP (TEO) and TP (VC).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the gG button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
6. After check, remove the lead wire connected in step 1.
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (XPCK) with lead wire.
Procedure :
1. Connect frequency counter to test point (XPCK) with lead wire.
2. Turned Power switch on.
3. Put the disc (YEDS-18) in to play the number five track.
3. Put the disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MHz.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.45
± 0.3Vp-p
TP(TEO)
TP(VC)
TP(VC)
BD board
oscilloscope
level=1.3
±0.6Vp-p
symmetry
A (DC voltage)
center of
waveform
waveform
B
0V
1 track jump waveform
Specified level: ––
× 100=less than ±22%
B
A
BD board
TP (XPCK)
frequency counter
TP
(XPCK)
TP
(TEO)
TP
(FEO)
TP
(FEI)
TP
(RF)
TP
(VC)
TP
(DGND)
TP
(AGCCON)
1
12
24
1
20
21
40
60
80
41
61
IC101
IC103
Adjustment Location:
[BD BOARD] (Conductor Side)
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