Sony TC-WE675 Service Manual ▷ View online
5
TC-WE675
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CASE
2-2. FRONT PANEL ASSY
1
screw
(BVTT 3x6)
2
two screws
(case 3 TP2)
3
two screws
(case 3 TP2)
4
case
qs
screw
(BVTP 3x8)
qf
screw
(BVTP 3x8)
qd
screw
(BVTP 3x8)
qg
two screws
(BVTT 3x6)
qj
claw
qh
claw
qk
front panel assy
8
CN301
7
CN401
2
CN807
1
CN5802
3
CN803
4
CNA806
5
flat type wire
(Deck A)
9
CN002
6
flat type wire
(Deck B)
0
screw
(BVTP 3x8)
qa
wire
Set
Case
Front Panel Assy
Cassette Lid Assy (Deck A/B)
Mechanism Deck Assy (Deck A/B)
• The equipment can be removed using the following procedure.
6
TC-WE675
2-3. CASSETTE LID ASSY (DECK A/B)
2-4. MECHANISM DECK ASSY (DECK A/B)
2
four claws
1
Push the EJECT button.
3
cassette lid assy
1
two screws
(BVTP 2.6x8)
3
mechanism deck assy
2
two screws
(BVTP 2.6x8)
7
TC-WE675
RESET
0
MEMORY
1
RMS/START
2
SET
3
CHECK
4
DISPLAY
5
m (AMS)
6
(AMS) M
7
x/CLEAR
Grid check display (*1)
n/BACK
8
N/FRONT
9
PAUSE X
A
REC MUTING W
b
REC z
C
DIRECTION MODE switch
g
h
s
PLAY
RELAY
H
A deck side
Button
Display
KEY CHECK & DISPLAY CHECK MODE
While pressing the h/BACK (A deck) and REC MUTING W (B deck) buttons with the power off, press the POWER button to turn on
the power.
The fluorescent display tube displays the number or special message corresponding to the button pressed.
The message displayed differs according to the position of the switch.
the power.
The fluorescent display tube displays the number or special message corresponding to the button pressed.
The message displayed differs according to the position of the switch.
SECTION 3
SERVICE MODE
RESET
0
MEMORY
1
DECK A
2
DECK B
3
A+B REC
4
HIGH/NOMAL
5
m (AMS)
6
(AMS) M
7
x
Segment check display (*2)
h
8
H
9
PAUSE X
A
REC MUTING W
b
REC z
C
FADER
d
ARL
E
SYNCHRO
All lit
DOLBY NR switch (*3)
OFF
h
B
PLAY
C
H
B deck side
Button
Display
Grit check display (*1)
Segment check display (*2)
RMS
(*3) The DOLBY NR switch consists of a pair of switches.
B and C are valid only in the ON or ON FILTER state.
8
TC-WE675
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 head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustment.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
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 MODE switch : g
• Standard record position :
Deliver the standard input signal level to input jack and set the
REC LEVEL knob to obtain the standard output signal level
as follows.
REC LEVEL knob to obtain the standard output signal level
as follows.
– Record Mode–
0 dBs = 0.775 V
Standard Input Level
Test Mode
1. While pressing the H/FRONT (DECK A) and REC MUT-
ING W buttons with the power off, press the ! button to turn
on the power. The fluorescent display tube lights up for about
one second, and the test mode is set. The test mode performs the
following two special functions.
• Playback speed switching function
on the power. The fluorescent display tube lights up for about
one second, and the test mode is set. The test mode performs the
following two special functions.
• Playback speed switching function
Pressing the HIGH/NORMAL button switches the playback
speed between standard/double speed.
speed between standard/double speed.
• Counter RESET & MEMORY function
Resets the counter when recording starts. When rewound with
the m (AMS) button after recording, stops at the point where
recording started.
the m (AMS) button after recording, stops at the point where
recording started.
2. To release the test mode, turn OFF the power switch.
Mode
Torque meter
Meter reading
Forward
CQ-102C
30 to 65 g • cm
(0.42 to 0.90 oz • inch)
Forward
back
tension
back
tension
CQ-102C
DECK A : 1 to 6 g • cm
(0.014 to 0.083 oz • inch)
(0.014 to 0.083 oz • inch)
DECK B : 2 to 9 g • cm
(0.028 to 0.125 oz • inch)
Reverse
CQ-102RC
30 to 65 g • cm
(0.42 to 0.90 oz • inch)
Reverse
back
tension
back
tension
CQ-102RC
1 to 6 g • cm
(0.014 to 0.083 oz • inch)
FF/REW
CQ-201B
70 to 120 g • cm
(0.97 to 1.67 oz • inch)
set
–
+
AF OSC
attenuator
10 k
Ω
600
Ω
LINE IN
level meter
LINE OUT
47 k
Ω
Standard Output Level
Test Tape
Input terminal
LINE IN
source impedance
10 k
Ω
input signal level
0.5 V (–3.8 dBs)
Input terminal
LINE IN
source impedance
10 k
Ω
input signal level
0.5 V (–3.8 dBs)
Tape
Contents
Use
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
WS-48B
3 kHz, 0 dB
Tape Speed Adjustment
P-4-L300
315 Hz, 0 dB
PB Level Adjustment
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