HCD-RG11, MHC-RG11 — Sony Audio Service Manual (repair manual). Page 11

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11
HCD-RG11
[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.
+
+
12
HCD-RG11
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 
13
HCD-RG11
CN732
CN733
CN731
TP connected to pin 
q;
 (IC751)
            C746A
Adjustment Location: CD board
[CD BOARD] (Component Side)
CD SECTION
RF Level Check
Procedure :
1. Connect oscilloscope to pin q; (IC751).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
IC751 pin 
q; 
GND
CD board
oscilloscope
Note :
Clear RF signal waveform means that the shape “ 
◊ ” can be clearly
distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.4 to 2.1 Vp-p
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
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.
14
HCD-RG11
SECTION 5
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
• Indication of transistor.
A
: B+ Line.
B
: B– Line.
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : FM
<
 
 
> :  CD
[
] : TAPE
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
Note: The components identified by mark 
0
 or dotted line
with mark 
0
 are critical for safety.
Replace only with part number specified.
5-1. Circuit Board Location
MOTOR board
ADDRESS SENSOR board
DRIVER board
TRANS board
VIDEO OUT board
SPDL board
SUB TRANS board 
MAIN board
POWER board
PANEL board
CD board
15
15
HCD-RG11
5-2. Block Diagrams
– Tuner/CD Section –
: FM
: CD
• Signal Path
• R-CH is omitted due to same as L-CH
FM 75
G
AM
JK101
FND1
ANT IN
1
7
IF OUT
8
OSC OUT
5
VT
+B
TU+12V
Q102
FM
10
FM OSC
15
VT1 IN
18
VT1
17
PD1
19
PLL
IC102
12
FM/AM IF
7
FM
14
AM OSC
2
VCO STOP
8
IF REQ
6
DO
4
DI
5
CL
3
CE
XIN
1
XOUT
24
CX101
4.5MHz
RF IF
AMP
Q101
CF101
CF102
DI
DO
CLK
CE
1
13
3
4
5
5
12
2
14
15
11
6
7
9
RB101
19
AM MIX OUT
IF OUT
9
AM/IF
12
AM OSC
24
VCO STOP
13
IF REQ MUTE
8
AM RF IN
20
AM OSC
22
V REG
23
FM IF
1
AM/FM IF MPX
IC101
11
L OUT
10
R OUT
MUTE
Q106
18
AM IF IN
IFT101
T101
R-CH
A
MAIN
SECTION
6
TUNED
7
STEREO
3
FM SD ADJ
5
FMDET
RV101
TUNER MUTE OUT
77
LC72131 CE
93
CLK
97
LC72131 DI
96
LC72131 BU2114 DO
95
TU STEREO
9
TUNED
10
MASTER CONTROL
IC601(1/2)
DO
CLK
CE
DI
L-CH
COIN
98
SQCK
100
CD RWC
2
CD DRF
8
CD SL+
5
CD SL-
4
TBL ADDRESS
SENSOR
68
IC711
69
CD PIC UP/DOWN SW
70
CD TRAY OPEN SW
71
CD TRAY CLOSE SW
73
CD MOTOR +
OPEN/CLOSE
S701
BU UP/
DOWN
S711
74
MOTOR
DRIVE
9
7
4
2
M
IC701
TURN
MOTOR
M721
OPTICAL PICK-UP
BLOCK
(KSM-213D)
LD
DRIVER
Q731
+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC781
FCS/TRK COIL
SL/SP MOTOR
DRIVER
ASP
IC731
1
2
27
26
VR
PD
11
12
18
17
3
CH1 INA
7
MUTE
CH1 OUTA
M
M
MOTOR
SLED
MOTOR
SPINDLE
S01
LIMIT
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FIN 1
FIN 2
E
3
F
4
LDD
62
LDS
63
FD
16
TO
15
SLD
29
SPD
27
52
DATA
50
CLK
51
CL
53
CE
34
TGL
54
DRF
39
CV-
40
CV+
30
SL-
Q775
31
SL+
35
TOFF
44
SLI
49
DEF
36
TES
37
HFL
33
JP+
32
JP-
DSP
IC751
EFMI
10
EFMO
9
DEF
1
TES
16
HFL
15
JP+
19
JP-
20
COIN
56
4.2M
61
CQCK
57
RWC
54
TGL
18
TOFF
17
CLV+
12
CLV-
13
45
XI
44
XO
X701
16.9344M
37
L CH
40
R CH
R CH
B
MAIN
SECTION
CD-L
2
1
38
SLOF
VP
14
MUTE
Q771,773
CH1 OUTB
CH4 OUTA
CH4 OUTB
CH21 OUTB
CH2 OUTA
CH3 OUTB
CH3 OUTA
4
CH1 INB
25
CH4 INA
9
CH2 INB
20
CH3 INB
SHUTER IN/OUT
28
D MUTE
26
LIMIT SW
27
3
PDO
58
RESET
D732
35
L MUTE
D733
D735
C
MAIN
SECTION
DO,CLK
53
WRQE
55
SQ0UT
CD A MUTE
6
CD WRQ
7
SQOUT
99
CD RESET OUT
3
CD MOTOR-
CD NUMBER SENSOR
NULL
AM IF
FM TUNED
LEVEL
+6.8V
Ver 1.1  2003.11

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