Sony PMC-R30L Service Manual ▷ View online
– 13 –
FM FREQUENCY COVERAGE
CHECK
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.8 ± 0.2 V
5.6 ± 0.2 V
Adjustment Part
<confirmation> <confirmation>
FM TRACKING CHECK
Adjust for a maximum reading on level meter.
<confirmation>
<confirmation>
87.5 MHz
108 MHz
MW FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
531 kHz
1,611 kHz
Reading on Digital voltmeter
0.9 ± 0.1 V
5.6 ± 0.2 V
Adjustment Part
L5
CT4
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT2
621 kHz
1,404 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1
450 kHz
LW FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
153 kHz
279 kHz
Reading on Digital voltmeter
0.6 ± 0.1 V
5.3 ± 0.2 V
Adjustment Part
CT3
<confirmation>
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT1
162 kHz
261 kHz
Adjustment Location: MAIN board (See page 14.)
TUNER SECTION 0 dB = 1 µV
Precautions in Repairing
Note : As a tuner unit (TU1) is difficult to repair if faulty,
replace it with new one.
• FM Section
Setting:
BAND button: FM
BAND button: FM
22.5 kHz frequency
deviation by 400 Hz signal
output level : as low as possible
deviation by 400 Hz signal
output level : as low as possible
• MW/LW Section
Setting:
BAND button: MW or LW
BAND button: MW or LW
30% amplitude
modulation by 400 Hz signal
output level : as low as possible
modulation by 400 Hz signal
output level : as low as possible
• Connecting Level Meter (FM, MW and LW)
• Connecting Digital Voltmeter (FM, MW and LW)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
FM terminal
(CNP2)
(CNP2)
FM RF signal
generator
generator
0.01
µ
F
set
Put the lead-wire
antenna close to
the supplied
MW/LW loop aerial.
antenna close to
the supplied
MW/LW loop aerial.
AM RF signal
generator
generator
phones jack (J302)
set
32
Ω
level meter
(range: 0.5-5 V ac)
(range: 0.5-5 V ac)
digital
voltmeter
voltmeter
tuner board
TP (VT)
TP (VT)
– 14 –
C706
C711
C712
CNP701
C723
C709
R704
1
16
R701
R706
R721
R720
R725
R726
R715
R717
R740
JW705
JW703
JW713
1
52
13
14
26
27
39
40
C705
C724
C717
C721
C715
C707
C737
C738
IC701
TP (RF)
– CD board (conduction side) –
Adjustment Location:
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC701 pin #£ (TP RF) and
GND on CD board.
2. Set the Test Disc YEDS-18 (CD). (Part No. : 3-702-101-01)
3. Press the
3. Press the
^ (CD) button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
π
Test Point:
RF level :
1.2
1.2
±
0.1 Vp-p
VOLT/DIV : 200 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
and raise vertical sensitivity.
L4
CT1
LW
TRACKING
ADJUSTMENT
CFT1
AM IF
ADJUSTMENT
IC1
TU1
TP (VT) (conductor side)
CNP2
CT4
L5
MW
FREQUENCY
COVERAGE
ADJUSTMENT
CT3
LW
FREQUENCY
COVERAGE
ADJUSTMENT
L3
CT2
MW
TRACKING
ADJUSTMENT
– MAIN board (component side) –
– 15 –
– 16 –
6-2. CIRCUIT BOARDS LOCATION
Pin No.
Pin Name
I/O
Pin Description
77 – 88
SEG20 – 31
O
LCD segment signal output terminal
89
VDD
—
Power supply (+ 5V)
90
NC
—
Connected to VDD.
91
VSS
—
Ground
92
TX
O
Crystal connection for clock oscillation. (32.768 kHz)
93
TEX
I
Crystal connection for clock oscillation. (32.768 kHz)
94 – 98
SEG32 – 36
O
LCD segment signal output terminal
99
REC
I
Tape REC detection signal input (from SW301)
100
PLAY
I
Tape PLAY detection signal input (from S302)
MAIN board
CD board
CD MOTOR board
POWER board
HEADPHONE board
REC SW board
KEY board
CONTROL board
BACK LIGHT board
6-1. IC PIN DESCRIPTION
• IC801 CXP83232A-015Q (SYSTEM CONTROL)
• IC801 CXP83232A-015Q (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
REG
I
AC check input
2
C-SCOR
I
CD-SCOR input
3
RMC
I
SIRCS receiver input
4, 5
NC
—
Not used.
6
C-SENS
I
CD SENS-1 input
7
C-SENS2
I
CD SENS-2 input
8
RDS-CLK
O
Tuner demodulator clock output
9
RDS-DATA
O
Tuner demodulator data output
10
C-XRST
O
CD system reset output
11
C-SQCK
O
Clock output for CD SUB-Q.
12
C-SQSO
I
CD SUB-Q input
13
A-MUTE
O
Mute signal output for audio.
14
R-ST
I
Stereo detection input
15
R-COUNT
I
Tuner PLL IC count input
16
R-DATA
O
Tuner PLL IC data output
17
R-CLK
O
Tuner PLL IC clock output
18
R-CE
O
Tuner PLL IC chip enable output
19
V-CE
O
Electrical volume chip enable output
20
V-DAT
O
Volume data output
21
V-CLK
O
Volume clock output
22
C-CLK
O
Clock output for CD-DSP command.
23
C-XLAT
O
CD-DSP command latch output
24
C-DATA
O
CD-DSP command data output
25
PA-CON
O
Power on/off control output
26
REG-CON
O
Regulator on/off control output. LED (STANDBY) control signal output.
27
C-MUTE
O
Mute signal output for CD.
28
BACKLIGHT-ON
O
Not used.
29
RDS-IND
O
Not used.
30 – 32
KEY1 – 3
I
Key return signal input
33
VER
I
Mode setting terminal
34
C-DOOR
I
CD lid open/close detection input
35
NC
—
Not used.
36
9/10K
I
Not used.
37
SHIFT-CLK
O
Shift clock on/off output
38
RST
I
Reset signal input
39
EXTAL
I
Clock oscillation input (8 MHz)
40
XTAL
O
Clock oscillation output (8 MHz)
41
VSS
—
Ground (for A/D converter)
42, 43
NC
—
Not used.
44
AVREF
I
Reference voltage input (for A/D convereter)
45
AVSS
—
Ground (for A/D converter)
46
VL
O
LCD bias resistor current control terminal (Cut off at standby)
47 – 49
VLC3 – 1
—
LCD bias power supply terminal
50 – 53
COM0 – 3
O
LCD common signal output terminal
54 – 73
SEG0 – 19
O
LCD segment signal output terminal
74
RADIO
O
Regulator on/off control output for radio block.
75
TAPE
O
Regulator on/off control output for tape block.
76
CD
O
Regulator on/off control output for CD block.
SECTION 6
DIAGRAMS
PMC-R30L
6-3. BLOCK DIAGRAM — CD SECTION —
– 17 –
– 18 –
A
5
CNP701
CNB703
7
6
4
10
12
3
8
14
15
13
16
C
B
E
F
D
LD
PD
LD ON
SWITCH
Q701
LASER
DIODE
CONTROL
PD1
PD2
LD
PD
E
F
VC
RF AMP
SERIAL/
PARALLEL
CONVERTER
DECODER
COMMAND
FE AMP
VREF
TTL
IIL
XRST
CLK
XLT
DATA
SENS2
SENS1
C. OUT
FOK
RF O
IIL
TTL
42
41
51
13
36
39
37
23
20
21
22
26
25
24
33
27
38
RF AMP & SYSTEM SERVO PROCESSOR
IC701
TRACKING
PHASE
FOCUS
PHASE
PHASE
6
16
TAO
FEO
SLO
19
17
18
TRACKING
COIL
DRIVE
25
7
FOCUS
COIL
DRIVE
TIN
FIN
3
SLED
MOTOR
DRIVE
SLIN
15
SPINDLE
MOTOR
DRIVE
SPI
MUTE
T+
T–
26
27
F+
F–
2
1
SL+
SL–
12
11
SP+
SP–
TRACKING
COIL
FOCUS
COIL
OPTICAL PICK-UP
BLOCK
(KSS-213C)
M
M
M702
SLED
MOTOR
M701
SPINDLE
MOTOR
SLED/SPINDLE
MOTOR DRIVE
TRACKING/FOCUS
COIL DRIVE
IC702
S701
(LIMIT)
RF
FOK
CNIN
SEIN
DATO
XLTO
CLKO
XRST
SERVO
AUT
SEQ.
D/A
INTERFACE
SUB CODE
PROCESSOR
EFM DEMODULATOR
DIGITAL
CLV
CPU INTERFACE
MDP
XLON
SENS
SQSO
SCOR
SPOA
SQCK
DATA
XLAT
CLOK
SYSM
XTAI
XTAO
SERIAL
INTERFACE
DIGITAL
FILTER
&
D/A
CONVERTER
AOUT1
LOUT1
AOUT2
LOUT2
PWM
AMP
PWM
AMP
CD L-CH
R-CH
MAIN
SECTION
1
35
18
11
10
12
13
14
79
21
15 17
6 5
57
4
7 8 9 62
70•71
65
67
76
74
DIGITAL SIGNAL PROCESSOR, D/A CONVERTER
IC703
10
74
34
6
7
12 11
24 23 22 27
2
X701
16.9344MHz
XRST
SENS2
SENS1
SQSO
SQCK
SCOR
DATA
XLAT
CLK
MUTE
C-DOOR
CD
RADIO
76
CD
SYSTEM CONTROL
IC801 (1/2)
RADIO ON
SWITCH
Q306
CD ON
SWITCH
Q302,307
COM
5V
5V
RA5V
COM
5V
5V
CD5V
SW701
(CD DOOR)
04
• Signal path
: CD
R-ch : same as L-ch.
4
3
6
5
2
1
CNP705
1
2
CD BOARD
MAIN BOARD
(1/2)
(1/2)
CONTROL BOARD (1/2)
3
CNP704
1
9
CNP303
11
9
CNP805
11
CNP806
11
10
9
8
5
3
6
7
1
2
4
CNP702
1
2
3
4
7
9
6
5
11
10
8
(Page 19)
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