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SECTION 4
TEST MODE
SECTION 5
MECHANICAL ADJUSTMENT
1. HOW TO ENTER THE TEST MODE
Turn on the main power. While the machine is in the CD STOP
state, short-circuit JW824 and JW825 on the SWITCH board once.
(Turn off the main power to exit the test mode.)
state, short-circuit JW824 and JW825 on the SWITCH board once.
(Turn off the main power to exit the test mode.)
[SWITCH Board]
– Soldering Side –
2. RF Level and Jitter Check
• Measurement Point
MAIN board (see page 9)
Vref (JW126) and RF Signal (JW135)
(Confirm by oscilloscope)
MAIN board (see page 9)
Vref (JW126) and RF Signal (JW135)
(Confirm by oscilloscope)
• Procedure
(1) Press the CD key
(1) Press the CD key
→
Press the DISPLAY ENTER MEMORY
key.
(2) Confirm that display on LCD changes as follows.
88 88
(Indication that automatic adjustment is completed)
(3) Press the EDIT key. (APC OFF)
The display ALL disappears.
(4) Confirm that jitter is 9.0 ns or less. Confirm also that the
RF level is from 0.9 to 1.3 Vp-p.
88 88
F–
–F
CHECK
CHECK
ALL
3. Traverse Signal Check
• Measurement Point:
MAIN board (see page 9)
Vref (JW126) and TE Signal (IC701 pin
Vref (JW126) and TE Signal (IC701 pin
$¶)
(Confirm by oscilloscope)
• Procedure
(1) Press the = or + key.
(2) Check that the traverse level is from 0.3 to 0.5 Vp-p.
(1) Press the = or + key.
(2) Check that the traverse level is from 0.3 to 0.5 Vp-p.
PRECAUTION
1.
Clean the following parts with a denatured-alchool-moistened
swab:
swab:
record/playback head
pinch roller
erase head
rubber belts
capstans
2.
Do not use a magnetized screwdriver for the adjustments.
3.
After the adjustments, apply suitable locking compound to the
parts adjusted.
parts adjusted.
4.
The adjustments should be performed with the raged power
supply voltage unless otherwise noted.
supply voltage unless otherwise noted.
Torque Measurement
Tape Tension Measurement
Meter Reading
36 to 61 g
•
cm
(0.504 to 0.854 oz
•
inch)
2 to 6 g
•
cm
(0.028 to 0.084 oz
•
inch)
36 to 61 g
•
cm
(0.504 to 0.854 oz
•
inch)
2 to 6 g
•
cm
(0.028 to 0.084 oz
•
inch)
61 to 143 g
•
cm
(0.854 to 2.002 oz
•
inch)
Mode
FWD
FWD
back tension
REV
REW
back tension
FF • REW
Torque Meter
CQ-102C
CQ-102RC
CQ-201B
Meter Reading
more than 100 g
•
cm
(more than 1.38 oz • inch)
more than 100 g
•
cm
(more than 1.38 oz • inch)
Mode
FWD
REV
Torque Meter
CQ-403A
CQ-403R
JW825 JW824
0.9 to 1.3 Vp-p
0V
A=B
A+B=
0.3 to 0.5 Vp-p
A+B=
0.3 to 0.5 Vp-p
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