Sony HCD-D690 / HCD-D990 / HCD-XB6 / HCD-XB600 / LBT-D690 / LBT-XB6 / LBT-XB600 Service Manual ▷ View online
– 33 –
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)
+
–
–
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
1. Mode: Playback (FWD)
2. Turn the adjustment screw and check output peaks. If the peaks
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.
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
– 34 –
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
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
Procedure:
+
–
–
set
recorded
portion
portion
CN207 (Pin
1
: L-CH)
(Pin
3
: R-CH)
level meter
1. Mode: record
2. Mode: Playback
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.
Adjustable limits:
2. Mode: Playback
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.
Adjustable limits:
CN207 PB level: 47.3 to 53.1 mV (–24.3 to –23.3 dB)
Adjustment Location: main board
attenuator
set
Pin
6
(L-CH) of IC1501 on the main board.
Pin
#¶
(R-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
Adjustment Location:
[MAIN BOARD] (Component 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
RV1501
IC1501
CN205
CN207
RV1551
RECORD LEVEL
IC301
IC201
Record bias Current Adjustment
DECK B
Procedure:
1. Mode: record
1. Mode: record
[AUDIO BOARD] (Conductor Side)
– 35 –
TUNER SECTION
0dB=1µV
AM Tuned Level Adjustment
Band: AM or MW
Procedure:
1. Set the output of SSG so that the input level of the set be-
Procedure:
1. Set the output of SSG so that the input level of the set be-
comes 55 dB.
2. Tune the set to 1,050 kHz (US, CND models), 999 kHz (other
models).
3. Adjust RV41 (AEP, UK, EE, CIS models), RV42 (other mod-
els) to the point (moment) when the TUNED indicator will
change from going off to going on.
change from 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 termi-
Procedure:
1. Supply a 25dBµ 98 MHz signal from the ANTENNA termi-
nal.
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV42 (AEP, UK,
3. If the TUNED indicator does not light, adjust RV42 (AEP, UK,
EE, CIS models), RV41 (other models) to the point (moment)
when the TUNED indicator will change from going off to go-
ing on.
when the TUNED indicator will change from going off to go-
ing on.
Adjustment Location: TCB board
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.
Other models
[TCB BOARD] (Component Side)
[TCB BOARD] (Component Side)
RV42
IC41
RV41
TM1
FE1
RV41
IC2
RV42
TM1
FE1
Adjustment Location:
AEP, UK model : (EE, CIS models next page)
[TCB B OARD] (Component Side)
[TCB B OARD] (Component Side)
Note: As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
AM Section Adjustment
Setting:
• Abbreviation
CND: Canadian model
EE:
EE:
East European model
– 36 –
RV41
IC1701
RV42
RV1701
CT1701
TP1702
(VCO)
(VCO)
(FILTER) TP1701
TM1
FE1
+
–
–
FREQUENCY COUNTER
+
–
–
LEVEL METER
IC41
L1701
RV1702
FM Polar Adjustment (EE, CIS models only)
Connection 1:
Carrier frequency : 69 MHz
Output level
Output level
: 1mV (60dBµ) (at 75 open)
Modulation
: AUDIO 1 kHZ, 10kHz deviation
Connection 2:
Carrier frequency : 69 MHz
Output level
Output level
: 1mV (60dBµ) (at 75 open)
Modulation
: AUDIO 31.25 kHZ, 10kHz deviation
(EXTERNAL MODULATION)
Adjustment Location :
EE, CIS models :
EE, CIS models :
[TCB BOARD] (Component Side)
• Abbreviation
EE: East European model
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
deviation according to "Connection 1".
2. Tune the set to 69 MHZ.
3. Adjust the RV1702 so that the reading of frequency counter
3. Adjust the RV1702 so that the reading of frequency counter
connected to TP1702 becomes within 31.25 kHz ± 0.05
kHz.(VCO adjustment)
kHz.(VCO adjustment)
4. Then record the reading of the level meter connected to TP1701
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
kHz deviation according to "Connection 2".
6. Tune the set to 69 MHz.
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter con-
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter con-
nected to TP1701 become maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 becomes maximum.(SUB CARRIER
PEAK Adjustment)
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 becomes maximum.(SUB CARRIER
PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes
14dB higher value than the level recorded in step 4.(SUB
CARRIER LEVEL Adjustment)
CARRIER LEVEL Adjustment)
FM ANTENNA terminal
(75
(75
Ω
)
75
Ω
coaxial
set
FM RF SSG
FM ANTENNA terminal
(75
(75
Ω
)
75
Ω
coaxial
set
FM RF SSG
AF OSC
Audio 31.25 kHz
external
modulation
terminal
modulation
terminal
RV41
AM tuned level
Adjustment
AM tuned level
Adjustment
RV1701,TP1701
Sub carrier level
Adjustment
Sub carrier level
Adjustment
CT1701,L1701,TP1701
Sub carrier peak
Adjustment
Sub carrier peak
Adjustment
RV1702,TP1702
VCO Adjustment
VCO Adjustment
RV42
FM tuned level
Adjustment
FM tuned level
Adjustment
Click on the first or last page to see other HCD-D690 / HCD-D990 / HCD-XB6 / HCD-XB600 / LBT-D690 / LBT-XB6 / LBT-XB600 service manuals if exist.