Sony HCD-EC55 Service Manual page 22

HCD-EC55/EC77/GX99
[CD SERVO TEST MODE]
This mode can check the servo system operations of the optical
pick-up system (= optical unit + BD board).
Note1: Do not enter the [CD SERVO TEST MODE] while any other test
mode is in progress.
Note2: Do not enter any other test mode while the [CD SERVO TEST
MODE] is in progress.
How to Enter the CD Servo Test Mode
Procedure:
1. Press the @/1 button to turn the power on.
2. Press the FUNCTION button to select CD function.
3. Press three buttons of CD u , PLAY MODE/TUNING MODE
and DISPLAY simultaneously.
4. It enters the CD servo test mode and displays "BDT S CU".
How to Exit from the CD Servo Test Mode
Procedure:
1. Press three buttons of CD u , PLAY MODE/TUNING MODE
and DISPLAY simultaneously.
2. It exits from the CD Servo Test Mode and returns to the
ordinary CD function.
Key Operation:
+ , – : Use these keys to move between the five modes
contained in the CD Servo Test Mode, that are the
S-Curve Mode, the RAM Read Mode, the RAM
Write Mode, the Command Out Mode and the Error
Rate Mode as described below. Also, use these keys
to move between the menus within the respective
five modes. When
advances to the next menu or to the next mode. When
– is pressed, the screen returns back to the
previous menu or to the previous mode. Use these
keys also to increase or decrease the numeric value
when changing the numeric value. Pressing
increases the value and pressing
value.
DSGX , EQ :Use these keys to move between the different layers
of the hierarchy of the CD Servo Test Mode shown
below. Press DSGX to move down to the lower
layer, and press EQ to move up to the higher layer.
TUNING+ML , lm –TUNING :
Use these keys to move the cursor to the right digit
or to the left digit in the six-digit number, when
changing the numeric value.
Press TUNING+ML to move the cursor to
the right, and press lm –TUNING to return
the cursor to the left.
FUNCTION :Use this key to execute Command Out in the
Command Out Mode.
22
+ is pressed, the screen
+
– decreases the
CD Servo Test Mode Tree:
Higher layer
S Curve Mode LD ON
(BDT S CU) (LD ON)
RAM Read Mode Disc Type
(BDTRAM R) (DISCTYPE)
Gain Index
(GAININDX)
RFO GAIN
(RFO_GAIN)
FEO GAIN
(FEO_GAIN)
SBAD GAIN
(SBAD_GAI)
TEO GAIN
(TEO_GAIN)
Disc Size
(DISCSIZE)
Op ABRAKE Error
(OPABRKER)
SBBT Data
(SBBT DAT)
FEOOCD
(FEOOCD)
RAM Write Mode SPG Mask
(BDTRAM W) (00 SPG)
Fix RF Gain
(00 FIX)
TMAX ON
(00 TMA)
Driver Mute OFF
(00 D_M)
Command Out Mode COMOUT6X
(BDT COMO) (COMOUT6X)
READ2X
(READ2X)
REG READ
(REG_READ)
FEBC?
(FEBC?)
FGADD?
(FGADD?)
TEBC?
(TEBC?)
TGADD?
(TGADD?)
RFGC?
(RFGC?)
FEOF?
(FEOF?)
TEOF?
(TEOF?)
TEIOCD1?
(TEIOCD1?)
TEIOCD2?
(TEIOCD2?)
TEIOCD3?
(TEIOCD3?)
TEOOCD?
(TEOOCD?)
FEOOCD?
(FEOOCD?)
MONITOR
(MONITOR)
Error Rate Mode
(BDT ERR)
Lower layer of menu hierarchy
value indication
(0000)
value indication
(0001)
value indication
(0009)
value indication
(0005)
value indication
(0007)
value indication
(0000)
value indication
(0000)
value indication
(0000)
value indication
(006B)
value indication
(F780)
value edit
(Non mask:00, Mask:01)
value edit
(Non Fix:00, AL Fix:01, RW Fix:02)
value edit
value edit
(Normal:00, Forced OFF:01)
value edit command out
(000000) (OK)
value edit command out
(60) (50)
value edit command out
(00) (0000)
command out
(00)
command out
(10)
command out
(00)
command out
(00)
command out
(00)
command out
(FFC0)
command out
(FFC0)
command out
(FE80)
command out
(FF40)
command out
(FFC0)
command out
(FD00)
command out
(F780)
value edit command out
(570A00) (OK)
Error rate indication
(00000000)