Sony HCD-D290 / HCD-G3300 / HCD-XB3 / HCD-XB30 / LBT-D290 / LBT-G3300 / LBT-XB3 / LBT-XB3S Service Manual ▷ View online
– 33 –
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
so that outputs match within 1dB of peak.
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
3. Mode: Playback (FWD)
4. Repeat steps 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
5. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Record/Playback Head (Deck A and B)
and main board.
reverse
forward
Tape Speed Adjustment
DECK A
Note: Start the Tape Speed adjustment as below after setting to the
test mode.
In the test mode, the tape speed is high during pressing the
H. SPEED DUBB button.
In the test mode, the tape speed is high during pressing the
H. SPEED DUBB button.
Procedure:
1. Turn the power switch on.
2. Press the GROOVE button, ENTER/NEXT button and
1. Turn the power switch on.
2. Press the GROOVE button, ENTER/NEXT button and
DISC 4 button simultaneously.
To exit from the test mode, press the POWER button.
Mode: Playback (FWD)
Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301 (L-
CH) and RV401 (R-CH) so that adjustment within adjustment level
as follows.
Adjustment Level:
CH) and RV401 (R-CH) so that adjustment within adjustment level
as follows.
Adjustment Level:
CN207 PB level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level
difference between the channels: within ±0.5 dB
difference between the channels: within ±0.5 dB
Adjustment Location: AUDIO and main boards
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
main board
CN207 (Pin
CN207 (Pin
1
: L-CH)
(Pin
3
:R-CH)
frequency counter
1. Insert the WS-48B into the deck A and the blank tape into the
deck B.
2. Press the REC button and
· button on the deck B. Then
the deck B is at recording mode.
3. Set the deck A to playback mode.
4. Keep pressing the H. SPEED DUBB button in playback mode.
4. Keep pressing the H. SPEED DUBB button in playback mode.
Then at HIGH speed mode.
5. Adjust RV652 on the AUDIO board do that frequency counter
reads 6,000 ± 60 Hz.
6. Take off the H. SPEED DUBB button.
Then at NORMAL speed mode.
7. Adjust RV651 on the AUDIO board so that frequency counter
reads 3,000 Hz.
8. Frequency difference between deck A and deck B the begin-
ning of the tape should be within ± 1.5%.
Adjustment Location: AUDIO board
Playback level Adjustment
DECK A
DECK B
Procedure:
Mode: Playback (FWD)
Mode: Playback (FWD)
+ 30
– 10
– 10
+
–
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
main board
CN207 (Pin
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
main
board
CN207
set
board
CN207
set
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
pin
3
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
pin
2
pin
1
L
R
– 34 –
Record bias Current Adjustment
DECK B
Procedure:
1. Mode: record
1. Mode: record
2. Mode: Playback
+
–
–
set
recorded
portion
portion
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 1 and 2.
Adjustable limits: Playback output of 315 Hz to playback output
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 1 and 2.
Adjustable limits: Playback output of 315 Hz to playback output
of 10kHz: 0±0.5 dB
Adjustment Location: AUDIO and main boards
Record Level Adjustment DECK B
Procedure:
1. Mode: record
1. Mode: record
Adjustable limits:
CN207 PB level: 47.3 to 53.1 mV (–24.3 to –23.3 dB)
Adjustment Location: main board
[MAIN BOARD] (Component Side)
[AUDIO BOARD] (Conductor Side)
RECORD
BAIS
TAPE SPEED
(NORMAL)
RV651
®
(HIGH)
RV652
®
RV311
L
®
RV411
R
®
PB
LEVEL
RV441 RV341
RV301
®
L
RV401
®
R
R
L
– DECK B –
– DECK A –
PB LEVEL
attenuator
set
Pin
6
(L-CH) of IC1501 on the main board.
Pin
#¶
(L-CH) of IC1501 on the main board.
1) 315 Hz
2) 10 kHz
2) 10 kHz
50 mV (–23.8 dB)
Pin
2
(GND) of ICN207 on the main board.
600
Ω
blank tape
CN-123
CN-123
AF OSC
set
Pin
6
(L-CH) of IC1501 on the main board.
Pin
#¶
(R-CH) of IC1501 on the main board.
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
CS-123
Pin
2
(GND) of CN207 on the main board.
600
Ω
attenuator
AF OSC
2. Mode: Playback
+
–
–
set
recorded
portion
portion
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
CH) and RV1551 (R-CH) on the main board to repeat steps 1 and 2.
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
CH) and RV1551 (R-CH) on the main board to repeat steps 1 and 2.
RV1501
IC1501
CN205
CN207
RV1551
RECORD LEVEL
IC301
IC201
– 35 –
TUNER SECTION
0dB=1µV
Note: As a front-end (FE1) is difficult to repair if faulty, replace it
with new one.
AM Section Adjustment
Setting:
AM Tuned Level Adjustment
Band: AM or MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
Procedure:
1. Set the output of SSG so that the input level of the set becomes
55 dB.
2. Tune the set to 1,050 kHz (US, CND models), 999 kHz (other
models).
3. Adjust RV41 (AEP, UK models), RV42 (other models) to the
point (moment) when the TUNED indicator will change from
going off to going on.
going off to going on.
Adjustment Location : TCB board
FM Section Adjustment
Note: This adjustment should be performed after the AM Tuned
Level Adjustment due to the same adjustment element.
Setting:
FM Tuned Level Adjustment
Band: FM
Procedure:
1. Supply a 25dBµ 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV42 (AEP, UK
Procedure:
1. Supply a 25dBµ 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV42 (AEP, UK
models), RV41 (other models) to the point (moment) when the
TUNED indicator will change from going off to going on.
TUNED indicator will change from going off to going on.
Adjustment Location: TCB board
Adjustment Location:
AEP, UK model
[TCB BOARD] (Component Side)
[TCB BOARD] (Component Side)
RV42
IC41
RV41
TM1
FE1
Other model
[TCB BOARD] (Component Side)
[TCB BOARD] (Component Side)
RV41
IC2
RV42
TM1
FE1
• Abbreviation
CND: Canadian model
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kH, 75 kHz
deviation (100%)
Modulation : AUDIO 1 kH, 75 kHz
deviation (100%)
FM ANTENNA terminal
(TM1) (75
(TM1) (75
Ω
open)
75
Ω
coaxial
set
FM RF stereo signal
generator
generator
AM RF SSG
loop antenna
set
loop antenna
(Supplied accessories)
60 cm
AM ANTENNA
terminal (TM1)
30% amplitude
modulation by
400 Hz signal
Field strength dB (
µ
V/m) =SSG output level dB (
µ
V/m) –26 dB.
– 36 –
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment.
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 impedance.
4. Clean the object lens by an applicator with neutral detergent
3. Use an oscilloscope with more than 10M impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol-
lowing checks.
lowing checks.
5. Adjust the focus bias adjustment when optical block is replaced.
Focus Bias check
+
–
BD board
TP (FEO)
TP (VC)
TP (VC)
oscilloscope
Procedure:
1. Connect oscilloscope to test point TP (RF). (GND terminal :
1. Connect oscilloscope to test point TP (RF). (GND terminal :
VC)
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that the shape “≈” can be clearly distinguished at the
3. Put disc (YEDS-18) in and playback.
4. Confirm that the shape “≈” can be clearly distinguished at the
center of the waveform and check the RF signal level.
• RF signal
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.3
1.3
±
0.3Vp-p
S Curve Check
+
–
BD board
TP (FEO)
TP (VC)
TP (VC)
oscilloscope
Procedure:
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and turned Power switch on again and
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical be-
tween A and B. And confirm peak to peak level within 3±1 Vp-p.
S-curve waveform
A
B
symmetry
within 3
±
1 Vp-p
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure than the ratio of
Note: • Try to measure several times to make sure than the ratio of
A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the bright-
ness to obtain best waveform.
RF Level Check
+
–
–
BD board
TP (RF)
TP (VC)
TP (VC)
oscilloscope
Procedure:
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note:
Clear RF signal waveform means that the shape “≈” can be
clearly distinguished at the center of the waveform.
clearly distinguished at the center of the waveform.
• RF signal
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.3
1.3
±
0.3Vp-p
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