Sony CDX-GT720 / CDX-GT72W / CDX-GT770 Service Manual ▷ View online
CDX-GT72W/GT720/GT770
17
3-9. CHASSIS (OP) ASSY
3-10. CHUCKING ARM SUB ASSY
coil spring (damper) (natural)
coil spring (damper) (green)
chassis (OP) assy
tension spring (KF)
gear (LE1)
lever (D)
slider (R)
chucking arm sub assy
spring
Note: Have this portion receive the chassis.
Note: Have this portion receive the chassis.
Note: Be careful not to touch the turn table.
CDX-GT72W/GT720/GT770
18
3-11. SLED MOTOR ASSY
sled mtor assy
sled mtor assy
spring
spring
stand
stand
turn table
three serration screws
(M
2
× 3)
three serration screws
(M
2
× 3)
Note: Place the stand with care not to touch the turn table.
Note:
Never remove these parts since they were adjusted.
Never remove these parts since they were adjusted.
Note for Assembly
Note: Take care to prevent the chassis from being bent
when tightening the three machine screws.
CDX-GT72W/GT720/GT770
19
3-12. OPTICAL PICK-UP SECTION
3-13. OPTICAL PICK-UP
optical pick-up section
Note: Be careful not to touch the lens and hologram
terminal when removing the optical pick-up section.
There is space at the end of the
leaf spring (sub guide) to avoid
contact with the slide.
leaf spring (sub guide) to avoid
contact with the slide.
pan tapping screw
(M
1.4
× 2.5)
leaf spring (sub guide)
leaf spring (OP)
optical pick-up
lead screw assy
Notes for Assembly
Prevent the end of the
leaf spring (sub guide) from being
in contact with the OP slide base.
leaf spring (sub guide) from being
in contact with the OP slide base.
Prevent the end of the
leaf spring (sub guide) from being
in contact with the OP slide base.
leaf spring (sub guide) from being
in contact with the OP slide base.
CDX-GT72W/GT720/GT770
20
SECTION 4
DIAGNOSIS FUNCTION
Description of the Diagnostics function:
1. Setting the Diag display mode
With the power off, press the [4] button, [5] button, and [4] but-
ton on the remote control (for more than 2 seconds) in turn.
ton on the remote control (for more than 2 seconds) in turn.
2. Canceling the Diag display mode
During the Diag function mode, press the [OFF] button.
3. Initial display in the Diag display mode.
Just when the Diag mode is entered, “reset count” is displayed.
The display mode is switched by each rotation of [
M >
] or
[
. m
] keys.
4. Contents of each display mode
4-1. Reset count display mode
4-2. Reset count by watchdog timer display mode
4-3. Number of connected units display mode
The display mode is switched by each rotation of [+] or [–] keys
during the number of connected units display mode.
during the number of connected units display mode.
99
99
999
9999
99
99999
Reset count display
OFFSET/FAILURE error display
CD error information display
Operating hours display
Number of connected units display
Reset count by watchdog timer display
DIAG
DIAG
DIAG
DIAG
DIAG
DIAG
99
Reset count
(in hexadecimal format)
(in hexadecimal format)
Diag code
01: Reset count
01: Reset count
DIAG
99
Reset count
(in hexadecimal format)
(in hexadecimal format)
Diag code
02: Number of resets by watchdog timer
02: Number of resets by watchdog timer
DIAG
999
Show the number of connected units for
CD-C, MD-C and XM respectively from
the leftmost (in hexadecimal format).
CD-C, MD-C and XM respectively from
the leftmost (in hexadecimal format).
Recency of information
1-3: 1 represents the latest.
1-3: 1 represents the latest.
Diag code
03: Number of connected unit.
03: Number of connected unit.
DIAG
999
999
999
DIAG
DIAG
DIAG
No. of connected units history 1 (latest) display
No. of connected units history 3 display
No. of connected units history 2 display
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