Sony TC-TX101 Service Manual ▷ View online
– 13 –
4-15. BRACKET (HEAD UNIT)
1
2
3
bracket (head unit)
– 14 –
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback/erase head
pinch roller
rubber belts
capstan
idlers
2. Demagnetize the record/playback/erase head with a head
demagnetizer. (Do not bring the head demagnetizer close to the
erase head.)
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Check
Mode
Torque Meter
Meter Reading
35 – 80 g • cm
FWD
CQ-102C
(0.49 – 1.11 oz • inch)
FWD
1 – 7 g • cm
Back tension
(0.014 – 0.097 oz • inch)
35 – 80 g • cm
REV
CQ-102RC
(0.49 – 1.11 oz • inch)
REV
1 – 7 g • cm
Back tension
(0.014 – 0.097 oz • inch)
more than 40 g • cm
FF, REW
CQ-201B
(more than 0.56 oz • inch)
SECTION 6
ELECTRICAL ADJUSTMENTS
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1. The adjustment should be performed in the publication.
(Be sure to male playback adjustment at first.)
2. The adjustments and measurement should be performed for both
L-CH and R-CH.
• Switch position
• Switch position
DOLBY NR switch : OFF
DIRECTION switch : A
DIRECTION switch : A
Standard Input Level
Input terminal
TAPE IN
source impedance
10 k
Ω
input signal level
0.49 V (– 4 dB)
Standard Output Level
Output terminal
TAPE OUT (L-CH)
load impedance
47 k
Ω
output signal level
0.49 V (– 4 dB)
Test Tape
Type
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
P-4-L300
315 Hz, 0 dB
PB Level Adjustment
WS-48A
3 kHz, 0 dB
Tape Speed Adjustment
0 dB = 0.775 V
– 15 –
TAPE OUT L-CH : CN05 pin
2
(MAIN board) R-CH : CN05 pin
4
TAPE OUT L-CH : CN05 pin
2
(MAIN board) R-CH : CN05 pin
4
Record Bias Adjustment
Setting : Set to the TEST mode. (See page 5.)
Procedure :
1. Connection for recording :
Procedure :
1. Connection for recording :
speed checker
or
frequency counter
47 k
Ω
set
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
Tape Speed Adjustment
Procedure :
1. Connect the speed checker or frequency counter as shown below
1. Connect the speed checker or frequency counter as shown below
and set FWD playback mode.
2. Adjust the capstan motor (M1) volume so that the reading on the
speed checker or frequency counter falls within the following
adjustment value.
adjustment value.
Adjustment Value : normal speed
Speed checker
Frequency counter
– 3 to + 3 %
2,910 to 3,090 Hz
Confirm that the deviation between tape top and tape end is within
3%.
3%.
Adjustment Location : Capstan motor (M1) volume (See page 16.)
Sample Value of Wow and flutter
W. RMS (JIS) within 0.3%
(test tape : WS-48A)
(test tape : WS-48A)
Playback Level Adjustment
Procedure :
1. Connect the speed checker of frequency counter as shown below
1. Connect the speed checker of frequency counter as shown below
and set FWD playback mode.
2. Adjust SFR03 (L-CH) and SFR04 (R-CH) on AMPLIFIER board
so that the reading on the level meter falls within the following
adjustment value.
adjustment value.
Adjustment Value :
TAPE OUT level
Level difference
between channels
– 4
±
2 dB (0.39 to 0.62 V)
within 2 dB
Confirm that the TAPE OUT level does not change even if Playback
and Stop operation is repeated several times.
and Stop operation is repeated several times.
Adjustment Location : AMPLIFIER board (See page 16.)
level meter
47 k
Ω
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
2. Connection for playback :
3. In the connection of item 2, playback the signal recorded in the
connection of item 1, confirm that the reading on the level meter
falls within the following adjustment value.
falls within the following adjustment value.
4. If these levels do not adjustment value, adjust SFR01 (L-CH)
and SFR02 (R-CH) on AMPLIFIER board to repeat items 1
and 2.
and 2.
Adjustment Value :Difference of playback output of 10 kHz to
playback output of 315 Hz : 0
±
0.5 dB
Adjustment Location : AMPLIFIER board (See page 16.)
Record Level Adjustment
Setting : Set to the TEST mode. (See page 5.)
Procedure :
1. Connection for recording :
Procedure :
1. Connection for recording :
2. Connection for playback :
3. In the connection of item 2, playback the signal recorded in the
connection of item 1, confirm that the reading on the level meter
falls within the following adjustment value.
falls within the following adjustment value.
4. If these levels do not adjustment value, adjust SFR11 (L-CH)
and SFR12 (R-CH) on MAIN board to repeat items 1 and 2.
Adjustment Value :Playback output level of 315 Hz :
– 4
±
2 dB (0.39 to 0.62 V)
Adjustment Location : MAIN board (See page 16.)
level meter
47 k
Ω
set
recorded portion
AF OSC
attenuator
10 k
Ω
set
600
Ω
blank tape
CS-123
CS-123
AF OSC
attenuator
10 k
Ω
set
600
Ω
blank tape
CS-123
CS-123
level meter
47 k
Ω
set
recorded portion
TAPE IN L-CH : CN05 pin
1
(MAIN board) R-CH : CN05 pin
5
1) 315 Hz
2) 10 kHz
2) 10 kHz
43.6 mV (– 25 dB)
TAPE OUT L-CH : CN05 pin
2
(MAIN board) R-CH : CN05 pin
4
TAPE IN L-CH : CN05 pin
1
(MAIN board) R-CH : CN05 pin
5
315 Hz, 0.49 V (– 4 dB)
TAPE OUT L-CH : CN05 pin
2
(MAIN board) R-CH : CN05 pin
4
– 16 –
IC02
IC03
CN05
TP1
TEST MODE
TEST MODE
TAPE OUT (L-CH : pin
2
, R-CH : pin
4
)
TAPE IN (L-CH : pin
1
, R-CH : pin
5
)
SFR04
PLAYBACK
LEVEL ADJ
LEVEL ADJ
(R-CH)
SFR03
PLAYBACK
LEVEL ADJ
LEVEL ADJ
(L-CH)
SFR01
RECORD BIAS
ADJ (L-CH)
SFR12
RECORD LEVEL
ADJ (R-CH)
SFR11
RECORD LEVEL
ADJ (L-CH)
SFR02
RECORD BIAS
ADJ (R-CH)
M1
CAPSTAN
/ REEL
MOTOR
TAPE
SPEED
ADJ
M2
LOADING
MOTOR
MECHANISM
DECK
Adjustment Location :
– MAIN board (component side) –
– AMPLIFIER board (component side) –
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