Sony TC-TX333 / TC-TX373 / TC-TX595 Service Manual ▷ View online
– 13 –
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 Measurement
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
(0.012 – 0.097 oz • inch)
35 – 80 g • cm
REV
CQ-102RC
(0.49 – 1.11 oz • inch)
REV
1 – 7 g • cm
Back tension
(0.012 – 0.097 oz • inch)
more than 40 g • cm
FF, REW
CQ-201B
(more than 0.56 oz • inch)
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
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 :
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
load impedance
47 k
Ω
output signal level
0.49 V (– 4 dB)
Test Tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
Tape Speed Adjustment
P-4-L300
315 Hz, 0 dB
PB Level Adjustment
0 dB = 0.775 V
– 14 –
Adjustment Limits : normal speed
Reading on frequency counter
2,910 to 3,090 Hz
Confirm that the deviation between tape top and tape end is within
3%.
3%.
Adjustment Location : Capstan motor volume (See page 15.)
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. Mode: FWD playback
1. Mode: FWD playback
2. Adjust SFR03 (L-CH) and SFR04 (R-CH) on MAIN board
so that the reading on level meter meets the adjustment limits
below.
below.
TAPE IN
315 Hz, 0.49 V (– 4 dB)
315 Hz, 0.49 V (– 4 dB)
TAPE IN
1) 315 Hz
2) 10 kHz
1) 315 Hz
2) 10 kHz
43.6 mV (– 25 dB)
TAPE OUT
Record Bias Adjustment
Setting :
Set to the TEST mode. (See page 4.)
Procedure :
1. Mode: Record
Set to the TEST mode. (See page 4.)
Procedure :
1. Mode: Record
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. Mode: FWD playback
1. Mode: FWD playback
Adjustment Limits :
TAPE OUT level
Level difference
between channels
– 4
±
2 dB (0.39 to 0.62 V)
within 2 dB
Check 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 : MAIN board (See page 15.)
TAPE OUT
level meter
47 k
Ω
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjust SFR01 (L-CH)
and SFR02 (R-CH) on REC board to repeat step 1 and 2.
Adjustment Level : Difference of playback output of 10 kHz to
playback output of 315 Hz : 0
±
0.5 dB
Adjustment Location : REC board (See page 15.)
Record Level Adjustment
Setting :
Set to the TEST mode. (See page 4.)
Procedure :
1. Mode: Record
Set to the TEST mode. (See page 4.)
Procedure :
1. Mode: Record
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become
adjustment level as follows.
4. If these levels do not adjustment level, adjust SFR11 (L-CH)
and SFR12 (R-CH) on REC board to repeat step 1 and 2.
Adjustment Level : Playback output level of 315 Hz :
– 4
±
2 dB (0.39 to 0.62 V)
Adjustment Location : REC board (See page 15.)
TAPE OUT
TAPE OUT
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
– 15 –
IC02
CN03
CN11_
CN03_
CN10
CN05
SFR04
PLAYBACK
LEVEL
ADJ
(R-CH)
PLAYBACK
LEVEL
ADJ
(R-CH)
SFR03
PLAYBACK
LEVEL
ADJ
(L-CH)
PLAYBACK
LEVEL
ADJ
(L-CH)
SFR11
RECORD
LEVEL
ADJ
(L-CH)
RECORD
LEVEL
ADJ
(L-CH)
SFR12
RECORD
LEVEL
ADJ
(R-CH)
RECORD
LEVEL
ADJ
(R-CH)
M1
CAPSTAN
/REEL
MOTOR
CN09
TEST MODE
TAPE
SPEED
ADJ
M2
LOADING
MOTOR
MECHANISM
DECK
SFR02
RECORD
BIAS
ADJ
(R-CH)
RECORD
BIAS
ADJ
(R-CH)
SFR01
RECORD
BIAS
ADJ
(L-CH)
RECORD
BIAS
ADJ
(L-CH)
Adjustment Location :
– MAIN board (component side) –
– LOW-VOLTAGE board
(component side) –
(component side) –
– REC board
(component side) –
(component side) –
– 16 –
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
TRANSFORMER board
SLIDE SW board (Singapore, Malaysia,
Hong Kong model)
LOW-VOLTAGE board
AMS board
REC board
MAIN board
MOTOR board
FRONT board
DECK board
POWER board
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