Sony HCD-GX25 / HCD-RG220 / MHC-GX25 / MHC-RG220 Service Manual ▷ View online
17
HCD-GX25/RG220
2-14. MOTOR (TB) BOARD
4
Remove the two solderings of motor.
3
MOTOR (TB) board
5
table motor assy (M741)
claw
claw
2
two screws
(+BTTP (M2.6))
1
2-15. MOTOR (LD) BOARD
4
Remove the two solderings of motor.
3
MOTOR (LD) board
1
belt (loading)
5
loading motor assy (M751)
2
two screws
(+BTTP (M2.6))
18
HCD-GX25/RG220
2-16. BD BOARD (BU-K6BD71A, BU-K6BD72)
4
BD board
5
CN708 (flat type)
base unit
1
screw
(+BTP 2.6
×
8)
2
Remove the two solderings of motor.
3
Remove the two solderings of motor.
19
HCD-GX25/RG220
SECTION 3
TEST MODE
[COLD RESET]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning the
set to the customer.
set to the customer.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GROOVE] and [POWER] simultaneously.
3. The message “COLD RESET” is displayed on the fluorescent
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GROOVE] and [POWER] simultaneously.
3. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
[TUNER STEP CHANGE-OVER]
(Except AEP and UK models)
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [TUNER BAND] key to select “AM”.
3. Press the [POWER] key to turn the power OFF.
4. Press two keys of [TUNER/BAND] and [POWER] simultaneously.
5. The message “9K STEP” or “10K STEP” is displayed on the
1. Press the [POWER] key to turn the power ON.
2. Press the [TUNER BAND] key to select “AM”.
3. Press the [POWER] key to turn the power OFF.
4. Press two keys of [TUNER/BAND] and [POWER] simultaneously.
5. The message “9K STEP” or “10K STEP” is displayed on the
fluorescent indicator tube, and thus the channel step is changed
over.
over.
[CD SHIP MODE]
• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
after repair.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press two keys of [CD] and [POWER] simultaneously.
4. The message “LOCK” is displayed on the fluorescent indicator
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press two keys of [CD] and [POWER] simultaneously.
4. The message “LOCK” is displayed on the fluorescent indicator
tube, and the CD ship mode is set.
[CD TRAY LOCK MODE]
• This mode is used to unable to take sample disc out of tray in the
shop.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Set disc on the tray.
4. While pressing the x key, press the Z key for 5 seconds.
5. The message “LOCKED” is displayed on the fluorescent
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Set disc on the tray.
4. While pressing the x key, press the Z key for 5 seconds.
5. The message “LOCKED” is displayed on the fluorescent
indicator tube and the tray is locked. (Even if pressing
the Z key, the message “LOCKED” is displayed on the
fluorescent indicator tube and the tray is locked)
the Z key, the message “LOCKED” is displayed on the
fluorescent indicator tube and the tray is locked)
6. To release from this mode, while pressing the x key, press
the Z key for 5 seconds.
7. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the tray is unlocked.
[AMP TEST MODE]
• This mode is used to set the parameter of AMP IC for adjustment
of tone quality and VACS level and display VACS status.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GAME EQ] and [EFFECT ON/OFF]
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GAME EQ] and [EFFECT ON/OFF]
simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST” is displayed on the fluorescent indicator tube
momentarily.
momentarily.
4. Press two keys of [GAME EQ] and [DISC 2] simultaneously, mode
is changed over to parameter setting of AMP IC and display of
VACS status.
VACS status.
5. When the VACS status, the message VACS level, VACS signal
level, and VACS signal hold level is displayed on the fluorescent
indicator tube.
indicator tube.
6. Press the [GROOVE] key, DBFB ON/OFF is changed over.
7. Press the [GAME MIXING] key, surround ON/OFF is changed
7. Press the [GAME MIXING] key, surround ON/OFF is changed
over.
8. To release from this mode, press two keys of [GAME EQ] and
[MOVIE EQ] simultaneously.
20
HCD-GX25/RG220
[AGING MODE]
• This mode can be used for operation check of CD section and
tape deck section.
CD section and tape deck section work in parallel.
CD section and tape deck section work in parallel.
If an error occurred:
The aging operation stops only an error occurred sections and
display then status.
display then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Set disc on the tray and set tape into the deck.
4. Set the “ALL DISCS” mode and “REV OFF” mode.
5. Press three keys of x , [GAME EQ] and [DISC SKIP/EX-CHANGE]
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Set disc on the tray and set tape into the deck.
4. Set the “ALL DISCS” mode and “REV OFF” mode.
5. Press three keys of x , [GAME EQ] and [DISC SKIP/EX-CHANGE]
simultaneously.
6. The message “AGING” is displayed on the fluorescent
indicator tube momentarily, then aging operations of CD and
tape are started at the same time.
tape are started at the same time.
7. To release from this mode, operate the “COLD RESET”.
1. Display at the Aging Mode
Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.
alternately.
If an error occurred, stop display which that section.
2. CD Section
The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.
Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
3. Tape Deck Section
The sequence during the aging mode is following as below.
If an error occurred, stop display that step.
If an error occurred, stop display that step.
Aging mode sequence (tape deck section) :
Rewind the tape A and B
“AAG-1 or 2”
Shut off
FWD play the tape A
“AAG-3”
2 minutes
Fast forward the tape A
“AAG-4”
Shut off or 20 seconds
REV play the tape A
“AAG-5”
2 minutes
Rewind the tape A
“AAG-6”
Shut off
FWD play the tape B
“BAG-3”
2 minutes
Fast forward the tape B
“BAG-4”
Shut off or 20 seconds
REV play the tape B
“BAG-5”
2 minutes
Rewind the tape B
“BAG-6”
Shut off
Note:
“
*
AG-
*
” is display of each step.
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