DOWNLOAD Sony HCD-DX10 / HCD-RG20 / HCD-RG30T / HCD-RG4SR / MHC-DX10 / MHC-RG20 / MHC-RG30T / MHC-RG4SR Service Manual ↓ Size: 4.84 MB | Pages: 52 in PDF or view online for FREE

Model
HCD-DX10 HCD-RG20 HCD-RG30T HCD-RG4SR MHC-DX10 MHC-RG20 MHC-RG30T MHC-RG4SR
Pages
52
Size
4.84 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-dx10-hcd-rg20-hcd-rg30t-hcd-rg4sr-mhc-dx10-mhc.pdf
Date

Sony HCD-DX10 / HCD-RG20 / HCD-RG30T / HCD-RG4SR / MHC-DX10 / MHC-RG20 / MHC-RG30T / MHC-RG4SR Service Manual ▷ View online

10
HCD-DX10/RG4SR/RG20/RG30T
2-8. CD BOARD, DRIVER BOARD, MOTOR BOARD AND ADDRESS SENSOR BOARD
9
 Pull-out the Table.
4
Two
 screws (+BVTP 2.6 
×
 8)
q;
Screw (+PTPWH 2.6
 
×
 8)
qa
Tray
1
Screw (+BVTP 2.6
 
×
 8)
qs
Screw (+BVTP 2.6
 
×
 8)
6
Flat type wire (8 core)
3
Flat type wire 
    (8 core)
8
MOTOR board
qd
ADDRESS SENSOR board
qf
Flat type wire (16 core)
qh
CD board
2
DRIVER board
5
Remove two solderings of turn motor (M721).
7
Connector
qg
Four screws
     (+BVTP 2.6
 
×
 8)
11
HCD-DX10/RG4SR/RG20/RG30T
SECTION 3
TEST MODE
[Change-over of AM Tuner Step between 9 kHz and
10 kHz]
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press  TUNER/BAND
button to select the BAND “AM”.
3. Press ?/1 button to turn the set OFF.
4. Press  TUNER/BAND  and ?/1 buttons simultaneously, and
the display of  fluorescent indicator tube changes to “AM 9 k
STEP” or “AM 10 k STEP”, and thus the channel step is changed
over.
[Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press three buttons x  ,  DISPLAY , and ?/1 simultaneously.
2. The fluorescent indicator tube displays “COLD RESET” and
the set is reset.
[Aging Mode]
This mode can be used for operation check of CD section and tape
deck section.
• If an error occurred:
The aging operation stops and is displayed 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 three discs in tray.  Select ALL DISCS, and REPEAT OFF.
2) Load the tapes recording use into both decks.
3) Press three buttons x ,  DISPLAY ,  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 [Cold Reset].
2.
Aging mode in CD section
1) Operation during aging mode
• In the agining mode ,the program is excuted in the following
sequence.
(1) The disc tray opens and closes.
(2) The disc tray turns to select a disc 3.
(3) The pickup accesses to the first track, and plays 3 seconds.
(4) The pickup accesses to the last track, and plays 3 seconds.
(5) The disc tray opens and closes.
(6) The disc tray turns to select a disc 1.
(7) The same operation starts like step (3).
(8) After a disc 1 aging operation, a disc 2 is selected.
(9) When an aging operation of a disc 3 is completed, the display
“AGING 
∗∗∗∗
” value increases.
(10) If no error occurs, the aging operation continues repeatedly.
2) Error display
Step
1
2
3
4
5
6
7
8
9
10
11
12
Operation
Rewind the TAPE A
Rewind the TAPE B
Play the TAPE A (1 minute)
Stop the TAPE A (1 second)
Play the TAPE A (3 minutes)
Rewind(AMS) the TAPE A
F.F.(AMS) the TAPE A
Play the TAPE B (1 minute)
Stop the TAPE B (1 second)
Record the TAPE B (3 minutes)
Rewind(AMS) the TAPE B
F.F.(AMS) the TAPE B
Display
TAPE
AAG-1
TAPE
BAG-2
TAPE
AAG-2
TAPE
AAG-3
TAPE
AAG-4
TAPE
AAG-5
TAPE
AAG-6
TAPE
BAG-2
TAPE
BAG-3
TAPE
BAG-4
TAPE
BAG-5
TAPE
BAG-6
Disc error
Display
Error
E00D01022
Focus error (No disc)
E00D02022
Sub Q error (Focus is good)
E00D02023
TOC reading error
E00D02014
Access error (Unable within regular time)
Mechanism error
Display
Error
E00M__E_0
Error during opening tray
E00M__C_2
EX-CHANGE disc error
E00M__D_0
Error during closing tray
E00M__F_3
EX-OPEN error
E00M__D_5
EX-CLOSE error
E00M__C_2
Chuck-up error
E00M__C_3
Unchucking error
3.
Aging mode in Tape Deck section
1) Operation during aging mode
• In the agining mode, the program is excuted in the following
sequence.
2) Error display
• If error occurred, the display remains like “TAPE BAG-2”.
4.
Exiting from the aging mode
• Be sure to perform Cold Reset to exit from the aging mode.
12
HCD-DX10/RG4SR/RG20/RG30T
[VACS ON/OFF Mode]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
1. Press  ?/1  button to turn the set ON.
2. To enter the test mode, press the three buttons x ,  DISPLAY
and  GROOVE  simultaneously.
3. Press  CD SYNC  button while pressing  DISPLAY  button.
The message “VACS OFF” or “VACS ON” appears.
4. To exit from this mode, press  ?/1  button to turn the set OFF.
[Equalizer Test  Mode]
• This mode is used to test the function of the equalizer.
Procedure:
1. Press  ?/1  button to turn the set ON.
2. To enter the test mode, press the three buttons  x ,  DISPLAY
and  GROOVE  simultaneously.
3. Press  
m
  button while pressing  DISPLAY  button. The message
“BASS + 0” is displayed.
4. The value increases like + 2, + 4 ... if pressing  >  button
while  DISPLAY  button is still depressed, or it decreases like -
2, - 4 ... if pressing  . button.
5. Press   
M
   button while pressing DISPLAY button. The message
“TRE  + 0” is displayed.
6. The value increases like + 2, + 4 ... if pressing  >  button
while  DISPLAY  button is still depressed, or it decreases like
- 2, - 4 ... if pressing  . button.
7. To exit from this mode, press  ?/1  button to turn the set OFF.
[CD Ship Mode (No Memory Clear) ]
• This mode moves the pickup to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press  CD  button and  ?/1   button simultaneously.
3. The "STANDBY" display blinks instantaneously, and the CD
ship mode is set.
[FL Tube Test  Mode]
• All fluorecent segments and LEDs are tested.
Procedure:
1. Press  ?/1  button to turn the set ON.
2. To enter the test mode, press the three buttons  x ,  DISPLAY
and  GROOVE  simultaneously.
3. Press DISPLAY and DISC SKIP/EX-CHANGE buttons
simultaneously.
4. All segments and LEDs (without STANDBY LED) are turned
on.
5. To exit from this mode, press  ?/1  button to turn the set OFF.
[Version and Destination Display Mode]
• The version or destination is displayed.
Procedure:
1. Press  ?/1  button to turn the set ON.
2. To enter the test mode, press the three buttons  x ,  DISPLAY
and  GROOVE  simultaneously.
3. Press  DISPLAY  and  DISC 1  buttons simultaneously.
4. The version is displayed.
5. Press  DISPLAY  and  DISC 2  buttons simultaneously.
6. The destination is displayed.
7. To exit from this mode, press  ?/1  button to turn the set OFF.
[Key Check Mode]
• Keyboard check.
Procedure:
1. Press  ?/1  button to turn the set ON.
2. To enter the test mode, press the three buttons  x ,  DISPLAY
and  GROOVE  simultaneously.
3. Press  DISPLAY  and  DISC 3  buttons simultaneously, and the
key check mode is activated.
4. In the key check mode, the fluorecent indicator displays “KEY
0 VOL 0”. Each time a button is pressed, “KEY 0” value
increases. However, once a button is pressed, it is no longer
taken into account.
“VOL 0” value increases like 1, 2, 3 ... if rotating  VOLUME
knob clockwise, or it decreases like 0, 9, 8, ... if rotating counter-
clockwise.
5. To exit from this mode, press  ?/1  button to turn the set OFF.
[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. To enter the test mode, press three buttons x ,  DISPLAY , and
GROOVE  simultaneously.
4. Press  DISPLAY  and  OPEN/CLOSE  buttons simultaneously.
5. The CD service mode is selected.
6. With the CD in stop status, press 
M
 button  to move the pickup
to outside track, or press 
m
 button to inside track.
7. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press  ?/1  button to turn the set OFF.
Note:
 • Always move the pickup to most inside track when exiting from
this mode.  Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be
chipped.
+
+
13
HCD-DX10/RG4SR/RG20/RG30T
SECTION 4
ELECTRICAL ADJUSTMENTS
FM Tuned Level Adjustment
Procedure:
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.
Adjustment Location: MAIN board
Null Adjustment
Procedure:
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 until the voltage becomes 0 V.
Adjustment Location: MAIN board
[MAIN BOARD]   Component side
FM RF Signal generator
75 
 coaxial
Carrier frequency : 98 MHz
Modulation           : AUDIO 1 kHz, 75 kHz
                              deviation (100%)
Output level          : 30 dB  (at 75 
 open)
FM ANTENNA terminal
(JK101)
set
FM RF Signal generator
75 
 coaxial
Carrier frequency : 98 MHz
Modulation           : AUDIO 1 kHz, 75 kHz
                              deviation (100%)
Output level          : 60 dB  (at 75 
 open)
FM ANTENNA terminal
(JK101)
set
T101
RV101
IFT101 : AM IF
T101:NULL
RV101:FM TUNED LEVEL
AM RF Signal generator
30% amplitude
modulation by
400Hz signal
output level : as low as possible
AM ANTENNA terminal
(JK101)
set
AM IF Adjustment
TUNER SECTION
Procedure:
1.
Set the frequency of the AM RF signal generator to 1000 kHz
(at 10 kHz step) or 999 kHz (at 9 kHz step).
2.
Tune the set to AM 1000 kHz (at 10 kHz step) or 999 kHz (at 9
kHz step).
3.
Adjust IFT101 so that the reading on level meter becomes in
maximum.
headphones jack (JK601)
level meter
set
16 
Page of 52
Display

Click on the first or last page to see other HCD-DX10 / HCD-RG20 / HCD-RG30T / HCD-RG4SR / MHC-DX10 / MHC-RG20 / MHC-RG30T / MHC-RG4SR service manuals if exist.