Sony HCD-ZT4, Руководство по обслуживанию

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HCD-ZT4
20
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demag-
netizer. (Do not bring the head magnetizer close to the erase
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, appiy 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
FWD CQ-102AS
2.0 – 8.0 mN • m
(20 to 80 g • cm)
(0.28 – 1.12 oz • inch)
FWD
Back Tension
CQ-102C
0.15 – 0.6 mN • m
(1.5 to 6 g • cm)
(0.021 – 0.083 oz • inch)
FF CQ-201AS
5 – 17.7 mN • m
(50 to 177 g • cm)
(0.7 – 2.48 oz • inch)
REV CQ-201B
5 – 17.7 mN • m
(50 to 177 g • cm)
(0.7 – 2.48 oz • inch)
• Tape Tension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 80 g
(more than 2.82 oz)
VACS DISPLAY
This mode is used to check the VACS level.
Procedure:
1. Press [
?/1
] button to turn on the system.
2. Press [ERASE] button, [
x
] button and [ENTER] button si-
multaneously.
3. The fl uorescent indicator tube displays “VACSA”. “A” repre-
sents Conventional VACS (Triggered by signal level)
4. To release from this mode, do the step 2 again.
METER SWITCH TOUCH COUNT DISPLAY
This mode is used to display the total count of meter pointer touch
initial switch and max switch.
Procedure:
1. Press [
?/1
] button to turn on the system.
2. Press [
x
] button, [ENTER] button and [DISPLAY] button si-
multaneously.
3. The fl uorescent indicator tube displays “IxxxxxMyyyyy”.
“I” represents the Initial Switch touch.
“xxxxx” represents the total count of Initial Switch touch.
(Maximum Value of “xxxxx” = 65535)
“M” represents the Max Switch touch.
“yyyyy” represents the total count of Max Switch touch.
(Maximum Value of “yyyyy” = 65535)
4. To release from this mode, do the step 2 again. The fl uorescent
indicator tube displays “MODE OUT”.
METER TEST MODE
This mode is used to check the meter device.
Procedure:
1. Press [
?/1
] button to turn on the system.
2. Press [
x
] button, [ENTER] button and [METER MODE] but-
ton simultaneously and the message “TST MODE IN” appears
on the
fl uorescent indicator tube.
3. Meter Backlight LEDs, Meter Pointer LEDs, Power Illumina-
tor LEDs and fl uorescent indicator tube are lighted up.
4. When you want to perform count total step from Initial Switch
to Max Switch operation mode, press [
M
] button. The me-
ter pointer will move from Initial Switch to Max Switch and
fi nally move back to the middle position. The total step count
information appears on the fl uorescent indicator tube. “xxx
STP yy” is shown.
“xxx” represents the total step.
(Value of “xxx” should between 430 steps to 470 steps)
“yy” represents the status of total step count.
(If total step between 430 steps to 470 steps, “yy” is OK, Else
“yy” is NG)
5. When you want to perform count total step from Max Switch
to Initial Switch operation mode, press [
m
] button. The me-
ter pointer will move from Max Switch to Initial Switch and
fi nally move back to the middle position. The total step count
information appears on the fl uorescent indicator tube. “xxx
STP yy” is shown.
“xxx” represents the total step.
(Value of “xxx” should between 430 steps to 470 steps)
“yy” represents the status of total step count.
(If total step between 430 steps to 470 steps, “yy” is OK, else
“yy” is NG).
6. To release from this mode, do the step 2 again. The fl uorescent
indicator tube displays “TST MODE OUT”.