Sony HCD-D890AV / HCD-XB55AV / HCD-XB80AV / HCD-XB88AV / LBT-D890AV / LBT-XB55AV / LBT-XB80AV Service Manual ▷ View online
– 13 –
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
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 1 dB of peak.
that outputs match within 1 dB of peak.
3. Mode: Playback
Tape Speed Adjustment (Deck A)
Note: Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the tape will move at double speed or normal
speed each time the H SPEED DUB. button is pressed.
In the test mode, the tape will move at double speed or normal
speed each time the H SPEED DUB. button is pressed.
Procedure :
With the power turned ON, press the SPECTRUM ANALYZER
button, ENTER button, and EFFECT button simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the 1/u button.
With the power turned ON, press the SPECTRUM ANALYZER
button, ENTER button, and EFFECT button simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the 1/u button.
1. Load WS-48B into deck B.
2. Play deck B.
3. Press the H SPEED DUB. button and play the tape at double
2. Play deck B.
3. Press the H SPEED DUB. button and play the tape at double
speed.
4. Adjust RV652 of the AUDIO board so that the reading of the
frequency counter becomes 6000 ± 180 Hz.
5. Press the H SPEED DUB. button and play the tape at normal
speed.
6. Adjust RV651 of the AUDIO board so that the reading of the
frequency counter becomes 3000 ± 90 Hz.
Adjustment Location: AUDIO board
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
Playback Level Adjustment (Deck A, Deck B)
Procedure:
Mode: Playback
Mode: Playback
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
Adjustment level:
CN403 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board
CN403 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
output
level
level
within
1 dB
1 dB
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
within 1dB
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
oscilloscope
set
L
R
Waveform of oscilloscope
in phase
45
°
90
°
135
°
180
°
good
wrong
main board
CN403
Pin
CN403
Pin
3
(L-CH)
Pin
2
(GND)
Pin
1
(R-CH)
reverse
forward
test tape
P-4-L300
(315Hz, 0dB)
P-4-L300
(315Hz, 0dB)
level meter
set
main board
CN403
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
– 14 –
Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
When set to the test mode performed in
Tape Speed Adjust-
ment
,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the r REC button.
3. Mode: Record
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
When set to the test mode performed in
Tape Speed Adjust-
ment
, when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will au-
tomatically switch to VIDEO.
set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will au-
tomatically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the r REC button.
3. Mode: Record
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
Adjustment Location
[AUDIO BOARD] (Conductor Side)
[AUDIO BOARD] (Conductor Side)
AF OSC
VIDEO/MD (AUDIO) IN
1) 315 Hz
2) 10 kHz
1) 315 Hz
2) 10 kHz
blank tape
CS-123
CS-123
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
recorded
position
position
level meter
set
main board
CN403
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
recorded
position
position
level meter
set
main board
CN403
CN403
Pin
3
(L-CH)
Pin
1
(R-CH)
[MAIN BOARD] (Component Side)
CN403
IC401
1
3
RV351
Record Level
(R CH)
Record Level
(R CH)
RV301
Record Level (L CH)
Record Level (L CH)
RV341(Lch),RV441(Rch)
Record Bias
Record Bias
RV301
RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
Playback Level (Deck B)
RV651 (Normal Speed)
RV652 (High Speed)
Tape Speed
RV652 (High Speed)
Tape Speed
RV651
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
Playback Level (Deck A)
RV652
RV311
RV411
AF OSC
VIDEO/MD (AUDIO) IN
1) 315 Hz
2) 10 kHz
1) 315 Hz
2) 10 kHz
blank tape
CS-123
CS-123
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
– 15 –
Procedure:
1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 to the point (moment) when the TUNED indicator
1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
TUNER SECTION
0dB=1
µ
V
Note 1:
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
it with new one.
Note 2:
No adjustment is needed due to a tuner pack for except
AEP, UK, East European, CIS models.
AEP, UK, East European, CIS models.
AM Tuned Level Adjustment
(AEP, UK, East European, CIS model only)
(AEP, UK, East European, CIS model only)
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
Band: MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
1. Set the output of SSG so that the input level of the set becomes
55 dB.
2. Tune the set to 999 kHz.
3. Adjust RV41 to the point (moment) when the TUNED indicator
3. Adjust RV41 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
FM Tuned Level Adjustment
(AEP, UK, East European, CIS model only)
(AEP, UK, East European, CIS model only)
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
Band: FM
Band: FM
Adjustment Location
[TCB BOARD] (Component Side)
[TCB BOARD] (Component Side)
loop antenna
AM RF SSG
loop antenna
(Supplied accessories)
(Supplied accessories)
30% amplitude
modulation by
400Hz signal
modulation by
400Hz signal
Modulation: 999 kHz
60cm
AM antenna
terminal (TM1)
terminal (TM1)
set
Field strength dB (
µ
V/m) = SSG output level dB (
µ
V/m) –26dB.
FM ANTENNA terminal (TM1)
FM RF SSG
75
Ω
coaxial
Carrier frequency: 98MHz
Modulation:
Modulation:
AUDIO 1kHz, 75kHz
deviation (100%)
deviation (100%)
Output level:
25dB (at 75
Ω
open)
set
RV41
AM Tuner Level
AM Tuner Level
TM1
RV42
FM Tuned
Level
IC21
– 16 –
FM Polar Adjustment (East European, CIS model only)
Connection 1 :
Connection 2 :
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
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 con-
3. Adjust the RV1702 so that the reading of frequency counter con-
nected to TP1702 (VCO) becomes within 31.25 kHz ± 0.05 kHz.
(VCO adjustment)
(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 (FILTER) becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB CAR-
RIER PEAK Adjustment)
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB CAR-
RIER PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes 14
dB higher value than the level recorded in step 4. (SUB CAR-
RIER LEVEL Adjustment)
RIER LEVEL Adjustment)
[TCB BOARD] (Component Side)
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Conductor Side)
FM antenna
terminal (75
terminal (75
Ω
)
FM RF SSG
75
Ω
coaxial
Carrier frequency: 69 MHz
Output level:
Output level:
1 mV (60 dB
µ
) (at 75
Ω
open)
Modulation:
AUDIO 1 kHz, 10 kHz deviation
set
FM antenna
terminal (75
terminal (75
Ω
)
Audio 31.25 kHz
external
modulation
terminal
modulation
terminal
FM RF SSG
AF OSC
75
Ω
coaxial
Carrier frequency: 69 MHz
Output level:
Output level:
1 mV (60 dB
µ
) (at 75
Ω
open)
Modulation:
AUDIO 31.25 kHz, 10 kHz deviation
(EXTERNAL MODULATION)
(EXTERNAL MODULATION)
set
frequency counter
level meter
TP1701
(FILTER)
(FILTER)
TP1702
(VCO)
(VCO)
IC1701
L1701
CT1701
Sub Carrier Peak
RV1701
Sub Carrier
Level
Sub Carrier
Level
IC1701
RV1702
VCO
VCO
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