Read Sony HCD-N555AVK / LBT-N555AVK Service Manual online
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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 (FWD)
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
main board
CN403
Pin
CN403
Pin
3
Pin
2
L
R
Pin
1
oscilloscope
Waveform of oscilloscope
good
wrong
in phase
45°
90°
135°
180°
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
parts adjusted.
Adjustment Location : Record/Playback Head (Deck A and B)
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 ad-
justment level.
CH) and RV401 (R-CH) so that adjustment within the following ad-
justment level.
Adjustment level :
CN403 PB level : 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels : within ± 0.5 dB
level difference between the channels : within ± 0.5 dB
Adjustment Location : MD board
L-CH
peak
peak
screw
position
position
R-CH
peak
peak
within
1dB
1dB
output
level
level
R-CH
peak
peak
L-CH
peak
peak
within 1dB
screw
position
position
set
FWD side
REV side
Adjustment screw
frequency counter
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
level meter
set
test tape
P-4-L300
(315Hz, 0dB)
P-4-L300
(315Hz, 0dB)
main board
CN403 (Pin
CN403 (Pin
3
: L-CH)
(Pin
1
: R-CH)
Tape Speed Adjustment
DECK A
Note : Start the tape speed adjustment as bellow after setting the
test mode. The tape speed can be changed with the HIGH
SPEED DUBBING button during the test mode.
SPEED DUBBING button during the test mode.
Method :
1. Turn the power switch on.
2. Press the DISPLAY/DEMO button, MENU 1 button and TUNER/
1. Turn the power switch on.
2. Press the DISPLAY/DEMO button, MENU 1 button and TUNER/
BAND button simulateously.
Procedure :
Mode : Playback (FWD)
Mode : Playback (FWD)
1. Insert the WS-48B into the deck A to playback.
2. Press the HIGH SPEED DUBBING button. Then at HIGH
2. Press the HIGH SPEED DUBBING button. Then at HIGH
SPEED mode.
3. Adjust RV652 on the MD board so that the frequency counter
reading becomes 6,000 ± 30 Hz.
4. Press the HIGH SPEED DUBBING button again to be set the
NORMAL SPEED mode.
5. Set to the playback mode.
6. Adjust RV651 on the MD board so that the frequency counter
6. Adjust RV651 on the MD board so that the frequency counter
reading becomes 3,000 ± 15 Hz.
Frequency difference between deck A and deck B the beginning of
the tape should be within ± 1.5%.
Adjustment Location : MD board
the tape should be within ± 1.5%.
Adjustment Location : MD board
Playback Level Adjustment
DECK A
DECK B
Procedure :
Mode : Playback (FWD)
Mode : Playback (FWD)
main board
CN403 (Pin
CN403 (Pin
3
: L-CH)
(Pin
1
: R-CH)
set
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