Cd Test Mode - Yamaha GX-505 Service Manual

GX-505/GX-505VCD

CD TEST MODE

When the CD TEST MODE is set through the SYSTEM TEST MODE, "00 TM1 00: 00" appears on the FL display.
The CD TEST MODE is enabled. Each button operates as follows for each mode. The MODE No. is increased by
pushing +10 button.
" "
Button
" 0 "
Open/close the tray
" 1 " Clamp up/down
" 2 "
DISC change
" 3 " Mechanism home process
" 4 " Jump to test mode 4
" 5 "
Tray close, Clamp down
" 6 " —
" 7 " Enter normal operation
(without mecha. INIT.)
" 8 " Enter normal operation
" 9 " Start TEST REPEAT
(Do not use this function as
it is not for servicing.)
Button
" 0 " Feed forward (outer direction)
" 1 "
Feed backward (inner direction)
" 2 " Rotate the disc motor
" 3 " Retard the disc motor
port TBLL ← Low,
" 4 "
port TBLR ← High
" 5 " port TSLW High/Low alternate
" 6 " Tray port control (open/close)
" 7 "
Line mute on/off
" 8 " —
" 9 " Jump to Test mode 1
The following button functions are not changed in the test mode No.
OPEN/CLOSE Open/close the tray
DISC CHANGE Clamp up/down
a
(STOP) Controls for the tray, the disc table and clamping stop. STANDBY command for the servo system.
w / d
Play (PLL)
(PLAY/PAUSE)
y Feed forward (outer direction)
t
Feed backward (inner direction)
DISC 1 Tray close, clamper down
[VCD Module condition check]
If the VCD module is in a good condition, the blue background appears on the monitor screen when in the CD test mode.
If the blue background does not appear, the possibility is that the VCD module has failed.
NOTE: None of the components of the VCD module can be supplied separately. Only a VCD module unit (VZ150200) is available.
17
MODE 1
Focus search
Play (PLL)
Play (without PLL)
Focus on, Tracking off, Feed off
+10 track kick
–10 track kick
+1 track kick
–1 track kick
+30 track kick
–30 track kick
MODE 4 MODE 5 (GX-505VCD only)
CD-ROM module load
CD-G module load
Decoder play command
Decoder pause command
Decoder abort command
Decoder soft reset
Decoder hard reset
—
—
—
MODE 2
Cancel adjust pass
Auto adjustment mode 1 *1
Tracking Offset, Focus Offset,
Focus Gain
Auto adjustment mode 2
Tracking Balance, Tracking Gain
Auto adjustment mode 3 *1
Focus Gain, Tracking Gain,
Focus Balance
Read and display the servo
coefficient
Displayed servo coefficient
address up
Displayed servo coefficient
address down
Displayed servo coefficient
increment
Displayed servo coefficient
decrement
Send the displayed servo
coefficient *2
*1 " A d j - "
adjustment and disappears at
the end of the adjustment.
*2 When the mode is reset to the
normal operating mode after the
servo coefficients are reset by
this operation, auto adjustment
is not available unless the auto
adjustment pass function is
cancelled.
MODE 3
*2
*1
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