Sony HCD-RG66 / MHC-RG66 Service Manual ▷ View online
17
HCD-RG66
CN731
TP731:
TP connected to pin
TP connected to pin
q;
(IC751)
IC751
CN733
IC731
Adjustment Location: BD board
[BD BOARD] (Component Side)
CD SECTION
RF Level Check
Procedure :
1. Connect an oscilloscope to pin q; (IC751).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RF signal
1. Connect an oscilloscope to pin q; (IC751).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
IC751 pin
q;
GND
BD 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
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
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.
18
HCD-RG66
SECTION 5
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
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
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : FM
<
tion tolerances.
no mark : FM
<
> : CD
[
] : TAPE
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
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
c
: DIGITAL OUT
• Abbreviation
AUS
: Australian model.
SP
: Singapore model.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(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.
19
19
HCD-RG66
5-1. Circuit Boards Location
• Waveforms
KEYBOARD board
PANEL board
SUB TRANS board
MAIN board
BD board
MIC board
SENSOR board
TRANS board
VIDEO OUT board
POWER board
DRIVER board
MOTOR board
SPDL MOTOR board
ADDRESS SENSOR board
REM board
SURROUND board
5
Q223 Collector
(TAPE REC mode)
(TAPE REC mode)
2
IC801
qd
(XT2)
1
IC751
rf
(XOUT)
4
IC102
ws
(XOUT)
2 V/DIV, 100 ns/DIV
5 V/DIV, 4 s/DIV
2 V/DIV, 10 s/DIV
2 V/DIV, 20 ns/DIV
3
IC801
qh
(CF2)
2 V/DIV, 40 ns/DIV
5.2 Vp-p
5.6 Vp-p
59 ns
222 ns
30.5 s
4.9 Vp-p
100 ns
5.0 Vp-p
15 Vp-p
13 s
20
20
HCD-RG66
5-2. Block Diagrams –TUNER Section–
: FM
: CD
• Signal Path
: DIGITAL OUT
• R-CH is omitted due to same as L-CH.
A
MAIN
SECTION
D
MAIN
SECTION
C
SECTION
B
MAIN
SECTION
MAIN
SECTION
E
RDS DATA
10
RDS CLK
29
CE
93
CLK
97
DATA
95
DATA IN
96
STEREO
81
TUNED
82
MASTER CONTROL
IC801(1/3)
DO
CL
CE
DI
L-CH
TBL ADDRESS
SENSOR
79
CD SENSOR
IC711
80
PIC UP/DOWN SW
88
OPEN SW
4
CLOSE SW
(OPEN/CLOSE)
S701
(UP/DOWN)
S711
FM 75
Ω
G
AM
JK101
ANT IN
1
7
IF OUT
8
OSC OUT
5
VT
FE101
EXCEPT AEP,UK
ANT IN
1
7
IF OUT
8
OSC OUT
5
VT
FE101
AEP,UK
+B
TU+12V
Q102
FM
10
FM OSC
16
A OUT
20
A IN
19
PD
18
PLL
IC102
7
FM
12
FM/AM IF
8
IF REQ
6
DO
4
DI
5
CL
3
CE
XIN
1
XOUT
22
X101
4.5MHz
RF IF
AMP
AMP
Q101
CF101
CF102
DO
DI
CL
CE
2
1
5
10
7
6
11
12
RB101
2
AM MIX OUT
AM/FM
11
IF REQ MUTE
10
AM RF IN
21
AM OSC
23
REQ
3
FM IF
1
AM/FM IF MPX
IC101
13
L OUT
14
R OUT
MUTE
Q103
4
AM IF IN
IFT101
R-CH
6
TUNED
7
STEREO
24
OSC FM SD
SFR101
DI
JR111
Q105
MUX
4
XO
14
XI
13
2
DATA
16
INT
RDS
IC103
AEP,UK
X102
4.332MHz
3
9
TU+12V
4
AFC
22
18
DECODER OUT
17
PLL IN
JR609
OPTICAL PICK-UP
BLOCK
LD
DRIVER
Q731
+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC781
FCS/TRK COIL
SL/SP MOTOR
SL/SP MOTOR
DRIVER
SLED/SPINDLE SERVO
RF AMP
IC731
1
25
2
27
26
VR
PD
11
12
18
17
3
CH1IN A
9
20
7
MUTE
CH1OUT A
M
M
(SLED)
(SPINDOL)
S01
(LIMIT)
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FOCUS/TRACKING/
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+
Q775
30
SL-
31
SL+
35
TOFF
44
SLI
49
DEF
36
TES
37
HFL
33
JP+
32
JP-
DIGITAL SIGNAL
PROCESSOR
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
SHUTER I/O
28
CLV+
12
CLV-
13
LIMIT SW
27
53
WRQ
55
SQOUT
3
PDO
45
XI
44
XO
X701
16.9344M
37
L CH
40
R CH
R-CH
58
RESET
D732
IC701
MOTOR
DRIVER
DRIVER
7
9
M
4
2
CD-L
2
1
38
SLOF
RF GAIN
24
4
D MUTE
26
Q774
Q771
MUTE
22
CD MOTOR+
21
CD MOTOR-
M721
(TURN)
CH1OUT B
CH4OUT A
CH4OUT B
CH2OUT B
CH2OUT A
CH3OUT B
CH3OUT A
CH1IN B
CH4IN A
CH2IN A
CH3IN A
31
D OUT
DIGITAL
OUT
(OPTICAL)
PH671
MUTE
18
IC804
MOTOR DRIVE
26
DI1
SL+
19
SL-
20
CD RESET
23
3
CLK
4
LATCH
16
DI2
15
DO1
14
CLK
13
LATCH
DI2
DO1
CLK
LATCH
LED601,602.604-608
6
12
MAIN
TU MUTE
WRQ
6
SQOUT
99
COIN
SQCK
100
CD RWC
5
CD DRF
8
DI2,DO1,CLK,LATCH
LATCH
91
CLOCK
94
DATA
CLOCK
98
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