Sony CX-LEM400 / XR-EM400 Service Manual ▷ View online
9
CX-LEM400
3-4. CONTROL BOARD, SUB CONTROL BOARD
3-5. TAPE MECHANISM DECK
5
four screws
(+BTP3
(+BTP3
×
10)
1
knob volume
6
CONTROL board
4
SUB CONTROL board
3
two screws
(+BVTP3
(+BVTP3
×
10)
2
wire (flat type)
(19core) (CN807)
1
wire (flat type) (7core) (CN101)
2
four screws
(+BVTP3
(+BVTP3
×
10)
3
tape mechanism deck
10
CX-LEM400
3-6. CASSETTE DOOR ASSY
3-7. POWER BOARD, MAIN BOARD
1
Open the cassette door assy.
3
cassette door assy
2
two claws
2
1
connector
(AC IN)
(AC IN)
2
connector
(CN901)
(CN901)
5
screw
(+BVTP3
(+BVTP3
×
10)
6
screw
(+BVTP3
(+BVTP3
×
10)
3
four screws
(+BVTP4
(+BVTP4
×
12)
7
MAIN board
4
POWER board
11
CX-LEM400
3-8. BD BOARD, OPTICAL PICK-UP (A-MAX. D)
1
Remove two
solders.
solders.
5
BD board
2
Remove two solders.
4
6
optical pick-up(A-MAX.D)
3
wire (flat type) (16 core)
(CN101)
12
CX-LEM400
SECTION 4
MECHANICAL ADJUSTMENTS
•
TAPE MECHANISM DECK SECTION
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
2.94 mN • m to 7.84 mN • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.14 mN • m to 0.59 mN • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.86 mN • m to 17.64 mN • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
more than 0.98 N • m
100 g or more
(3.53 oz or more)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-201B
CQ-403A
Meter reading
FWD
FWD
back tension
back tension
FF/REW
FWD tension
SECTION 5
ELECTRICAL ADJUSTMENTS
Precaution
1. Demagnetize the record/playback head with a head demagne-
tizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in
this service manual. (As a general rule, playback circuit ad-
justment should be completed before performing recording
circuit adjustment.)
justment should be completed before performing recording
circuit adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless other-
wise specified.
• Test Tape
Tape
Signal
Used for
P-4-A100
10 kHz, – 10 dB
Azimuth Adjustment
WS-48B
3 kHz, 0 dB
Tape Speed Check
0 dB = 0.775 V
DECK SECTION
Click on the first or last page to see other CX-LEM400 / XR-EM400 service manuals if exist.