Sony CFD-G500 / CFD-G500L Service Manual ▷ View online
13
CFD-G500/G500L
digital
voltmeter
voltmeter
100 k
Ω
TP (VT)
i
jack (J321)
set
32
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
30% amplitude
modulation by
400 Hz signal
modulation by
400 Hz signal
TP (FM IN)
FM RF signal
generator
generator
0.01
µ
F
set
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
deviation by 1 kHz signal
output level : as low as possible
TUNER SECTION 0 dB = 1 µV
• AM Section
Setting:
RADIO BAND•AUTO PRESET button: AM, MW or LW
RADIO BAND•AUTO PRESET button: AM, MW or LW
• Connecting Level Meter (FM, AM or MW and LW)
• Connecting Digital Voltmeter (FM, AM or 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.
the frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
AEP, UK, East European, Russian Models
MW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
MW FREQUENCY COVERAGE CHECK
Frequency Display
531 kHz
1,611 kHz
Reading on Digital voltmeter
1.0 ± 0.5 V
5.2 ± 0.6 V
Adjustment Part
<confirmation>
<confirmation>
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3-1
CT3
621 kHz
1,404 kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
153 kHz
279 kHz
Reading on Digital voltmeter
0.6 ± 0.3 V
5.0 ± 0.1 V
Adjustment Part
<confirmation>
L4
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3-2
CT5
162 kHz
261 kHz
US, Canadian, E, Singapore, Australian Models
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
530 kHz
1,710 kHz
Reading on Digital voltmeter
1.0 ± 0.05 V
5.3 ± 0.7 V
Adjustment Part
L4
<confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
620 kHz
1,400 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.3 ± 0.3 V
3.0 ± 0.2 V
Adjustment Part
<confirmation>
L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
87.5 MHz
108 MHz
Adjustment Location: See page 14.
• FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
RADIO BAND•AUTO PRESET button: FM
14
CFD-G500/G500L
IC701
R729
C704
R708
C711
C709
C736
C734
R709
C705
R710
R701
C703
C731
R706
R723
C708
JC703
C743
C742
C707
C739
R735
R733
R734
R736
R711
R713
C732
JW706
JW707
JW709
JW725
JW726
JW708
– CD board (conductor side) –
TP
(RF)
TP
(VREF)
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 4 and pin qa
(or TP (RF) and TP (VREF)).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the NX (CD) button.
4. Confirm that the oscilloscope waveform is as shown in the
3. Press the NX (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)
Test Point:
RF level :
0.85
0.85
±
0.2 Vp-p
VOLT/DIV : 50 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
TP (FM IN)
(CONDUCTOR SIDE)
CT1
IC1
IC2
CT3
CT5
L1
L2
T2
T1
L3-2
L3-1
– MAIN board (component side) –
TP (VT)
(CONDUCTOR SIDE)
15
15
CFD-G500/G500L
SECTION 6
DIAGRAMS
• Circuit Boards Location
For Schematic Diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF.
50 WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 12 V and fed with regulated dc power
• Power voltage is dc 12 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: PB
a
: REC
J
: CD
d
: LINE IN
• Abbreviation
AUS
: Australian model.
CND
: Canadian model.
SP
: Singapore model.
CET
: East European and Russian models.
For Printed Wiring Boards.
Note:
•
Note:
•
X
: parts extracted from the component side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
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.)
Note:
The components identi-
fied by mark
fied by mark
0
or dot-
ted line with mark
0
are
critical for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés
par une marque
par une marque
0
sont cri-
tiques pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
BAT 2 board
CONTROL 3 board
POWER board
TRANS board
BAT 1 board
LCD board
CONTROL 1 board
H/P board
TC board
TUNER board
MAIN board
CD board
CONTROL 2 board
16
16
CFD-G500/G500L
6-1. BLOCK DIAGRAMS — MAIN SECTION —
: FM
: CD
• Signal Path
• R-CH is omitted due to same as L-CH.
: PB
: REC
: LINE IN
20
B
A
TUNER/CD
SECTION
L OUT
L-CH
R-CH
R-CH
HEAD
R-CH
R-CH
(MAGNET)
L-CH
BIAS
OSC
Q301
PRE AMP
IC301
24
22
5
4
15
21
REC
TAPE
L.L IN
RADIO
PB AMP
26dB
L.LD
TAPE
TAPE
T301
12
MUTE
Q171
AMP
Q321
INV
Q953
SW
Q951
BASS AGC
Q351
3
8
STBY
POWER AMP
IC371
R-CH
R-CH
J391
SPEAKER (L-CH)
SPEAKER (R-CH)
FUNCTION
SWITCH
S409-416
LED DRIVE
Q809
64
V-CLOCK
65
V-DATA
34
A-MUTE
67
TAPE
39
REC
IC801(2/2)
SYSTEM CONTROL
70
71
74
75
X802
32.768kHz
X801
4.19MHz
XT1
XT2
X1
X2
S301
REC PB
REC AMP
AMP
BUFFER
7dB
17
LINE
51
TC-PLAY
M
+9V
M971
CAPSTAN/REEL
MOTOR
S972
MOTOR
S971
PLAY
TUNER/CD
SECTION
6
REF
66
P-CON
KEY-1
43
WP
50
KEY-2
44
W-LED1
79
LED DRIVE
Q810
W-LED2
80
S401-408
SCL
35
SDA
36
6
5
EEP ROM
IC803
77
CD
VIN1
1
A1
5
B1
7
SEL1
4
SOUND/VOLUME
IC321
SI
14
SC
13
17
OUT1
AGC
Q354
VDD(SW)
VDD(SW)
12
13
3
10
11
5
8
STBY
WOOFER
POWER AMP
IC351
30
WOOFER ON/OFF
31
WOOFER 1/2
LCD891
LIQUID CRYSTAL
DISPLAY PANEL
27
10
SEG17
SEG0
9
6
COM3
COM0
SP191
SP291
SP393
WOOFER
T901
RECT
D901-904
+6V REG
Q954
+9V REG
Q971
CD +6V REG
Q972
+3.3V REG
Q956
CD/RADIO +6V
CD +3.3V
VDD(SW)
EXCEPT
US, E
US, E
US, E
POWER
SWITCH
Q952
2
3
+3.3V
REG
IC802
2
1
RESET
IC805
µ
COM VDD
D807
D806
1
REMOTE
CONTROL
IC891
76
RESET
49
REG CHK
D893
AU 6V
Q955
PB
REC
CD 3.3V
LPF
Q322
GAIN
CONTROL
Q323
FUNCTION
SWITCH
FUNCTION
SWITCH
KEY-3
45
TEST-A
D401-408
VDD(SW)
2
AU +6V
48
RMC
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
8PCS, 12V
POWER AMP +12V
+9V
J381
LINE IN
POWER DRIVE
WOOFER
OPR/BATT
(AC IN)
CNJ901
L.IN
L.RD
SWITCH
SWITCH
Q302
Q303
32
ISS1
33
ISS2
AEP, UK, CET
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