Mechanical Adjustments - Sony HCD-GTX888 Service Manual

[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 button to turn on the system.
2. Press x button, [ENTER] button and [DISPLAY] button
simultaneously.
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 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 button to turn on the system.
2. Press x button, [ENTER] button and [METER MODE] button
simultaneously.
3. Meter Backlight LEDs, Meter Pointer LEDs, Power Illuminator
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 [>>] button. The meter
pointer will move from Initial Switch to Max Switch and fi nally
move back to the middle position. The total step count informa-
tion 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 [<<] button. The meter
pointer will move from Max Switch to Initial Switch and fi nally
move back to the middle position. The total step count informa-
tion 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 step (2) again.
The fl uorescent indicator tube displays "TST MODE OUT".
HCD-GTX777/GTX787/GTX888
SECTION 4

MECHANICAL ADJUSTMENTS

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. 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
FWD CQ-102C
FWD
back tension CQ-102C
REV CQ-102RC
REV
CQ-102RC
back tension
FF/REW CQ-201B
Meter reading
2.9m N • m to 6.9m N • m
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
0.15m N • m to 0.59m N • m
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
2.9m N • m to 6.9m N • m
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
0.15m N • m to 0.59m N • m
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
4.8m N • m to 16.7m N • m
49 to 170 g • cm
(0.68 – 2.36 oz • inch)
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