Cd Test Mode - Yamaha GX-900 Service Manual

GX-900

CD TEST MODE

When CD TEST MODE is set through SYSTEM TEST MODE, "00STM100: 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
21
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 2
Cancel adjust pass
Auto adjustment mode 1
Tracking Offset, Focus Offset,
Focus Gain
Auto adjustment mode 2
Tracking Balance, Tracking Gain
Auto adjustment mode 3
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 - "
MODE 5
adjustment and disappears at
the end of the adjustment.
*2 When the mode is reset to the
Production Mode after the servo
coefficients are renewed by this
operation, auto adjustment is not
available unless the auto
adjustment pass function is
cancelled.
MODE 3
*2
*1
*1
*1
l i g h t s d u r i n g t h e