Sony HCD-GX25 / HCD-RG220 / MHC-GX25 / MHC-RG220 Service Manual ▷ View online
21
HCD-GX25/RG220
[GC TEST MODE]
• This mode is used to check the fluorescent indicator tube, LED
and key.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GAME EQ] and [DISC 2] simultaneously.
3. Fluorescent indicator tube and LEDs are all turned ON.
4. Press two keys of [GAME EQ] and [DISC 2] simultaneously, mode
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GAME EQ] and [DISC 2] simultaneously.
3. Fluorescent indicator tube and LEDs are all turned ON.
4. Press two keys of [GAME EQ] and [DISC 2] simultaneously, mode
is changed over.
5. In the key check mode, press each key, the defined key number
of every each key list is displayed on the fluorescent indicator
tube.
tube.
6. In the key count check mode, “KEYCNT 0” is displayed on the
fluorescent indicator tube. Each time a key is pressed,
“KEYCNT” value increases. However, once a key is pressed, it
is no longer taken into account.
“KEYCNT” value increases. However, once a key is pressed, it
is no longer taken into account.
7. In the headphone input check mode, connect the headphone,
the message “H_P ON” is displayed on the fluorescent
indicator tube, and disconnect the headphone, the message “H_P
OFF” is displayed on the fluorescent indicator tube.
indicator tube, and disconnect the headphone, the message “H_P
OFF” is displayed on the fluorescent indicator tube.
8. In the volume check mode, turn the [VOLUME] knob, the
display on the fluorescent indicator tube is changed over to
“VOLUME UP”, “VOLUME FLAT” or “VOLUME DOWN”
“VOLUME UP”, “VOLUME FLAT” or “VOLUME DOWN”
[MC TEST MODE]
• This mode is used to check operations of Amplifier.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GAME EQ] and [DISC 3] simultaneously.
3. When the MC test mode is activated, the message “TEST
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of x , [GAME EQ] and [DISC 3] simultaneously.
3. When the MC test mode is activated, the message “TEST
MODE” is displayed on the fluorescent indicator tube
momentarily, then VACS level is displayed on the fluorescent
indicator tube.
momentarily, then VACS level is displayed on the fluorescent
indicator tube.
4. Press the [MUSIC EQ] key, the display on the fluorescent
indicator tube is changed over to “GEQ MAX”, press the
[EFFECT ON/OFF] key, the display on the fluorescent indicator
tube is changed over to “GEQ FLAT”, press the [MOVIE EQ]
key, the display on the fluorescent indicator tube is changed
over to “GEQ MIN”,
[EFFECT ON/OFF] key, the display on the fluorescent indicator
tube is changed over to “GEQ FLAT”, press the [MOVIE EQ]
key, the display on the fluorescent indicator tube is changed
over to “GEQ MIN”,
5. Turn the [VOLUME] knob, the display on the fluorescent
indicator tube is changed over to “VOLUME MAX”, “VOLUME
16” or “VOLUME MIN”
16” or “VOLUME MIN”
6. Press the [GROOVE] key, VACS ON/OFF is changed over.
7. When the [REC PAUSE/START] key is pressed with a tape set in
7. When the [REC PAUSE/START] key is pressed with a tape set in
the deck-B, the function is switched “MD” or “VIDEO” and
recording starts. When the m or M key is pressed during
recording, the tape is rewound back to the beginning of
recording, the function is switched to “TAPE B”, then playback
starts.
recording starts. When the m or M key is pressed during
recording, the tape is rewound back to the beginning of
recording, the function is switched to “TAPE B”, then playback
starts.
8. When the [CD SYNC] key is pressed with the test tape (AMS-
100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
9. To release from this mode, press the [POWER] key.
[MODEL, DESTINATION AND VERSION DISPLAY]
• This mode is used to check the model, destination and software
version.
Procedure:
1. Set to the standby state.
2. Press three keys of x , [GAME EQ] and [MOVIE EQ]
1. Set to the standby state.
2. Press three keys of x , [GAME EQ] and [MOVIE EQ]
simultaneously.
3. When the model, destination and version display mode is
activated, the model an destination is displayed on the
fluorescent indicator tube.
fluorescent indicator tube.
4. Press two keys of [GAME EQ] and [DISC 2] simultaneously, mode
is changed over to model and destination display mode and
version display mode.
version display mode.
5. To release from this mode, press the two keys of [GAME EQ]
and [MOVIE EQ] simultaneously.
[CD ERROR CODE DISPLAY]
• This mode can be used for error display of CD section.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and [DISC 1] simultaneously.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and [DISC 1] simultaneously.
Note:
Error code is not displayed on the fluorescent indicator tube.
[CD SERVICE MODE]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and Z simultaneously.
4. When the CD service mode is activated, the message
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and Z simultaneously.
4. When the CD service mode is activated, the message
“TRAVERS ON” is displayed on the fluorescent indicator tube.
5. Press the M key, optical pick-up move to outside track and
the message “SLED OUT” is displayed on the fluorescent
indicator tube.
indicator tube.
6. Press the m key, optical pick-up move to inside track and
the message “SLED IN” is displayed on the fluorescent
indicator tube..
indicator tube..
7. Press the [MOVIE EQ] key, traverse ON/OFF is changed over.
[5 REPEAT LIMIT CANCEL]
• Number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode is used to enables CD to repeat
playback for limitless times.
playback for limitless times.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and G simultaneously.
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and G simultaneously.
22
HCD-GX25/RG220
SECTION 4
ELECTRICAL ADJUSTMENTS
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MW impedance.
4. Clean the object lens by an applicator with neutral detergent
3. Use an oscilloscope with more than 10MW impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
following checks.
S-CURVE CHECK
Procedure :
1. Connect an oscilloscope to TP (FE) and TP (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and actuate the focus search. (In
1. Connect an oscilloscope to TP (FE) and TP (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 3 ± 0.5 Vp-p.
within 3 ± 0.5 Vp-p.
Note:
• Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF LEVEL CHECK
Procedure :
1. Connect an oscilloscope to TP (RF) and TP (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
1. Connect an oscilloscope to TP (RF) and TP (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
Note:
Clear RF signal waveform means that the shape “
◊ ” can be
clearly distinguished at the center of the waveform.
Connecting Location: BD board
BD board
Oscilloscope
TP(FE)
TP(VC)
TP(VC)
symmetry
S-curve waveform
within 3
±
0.5Vp-p
A
B
TP(RF)
BD board
oscilloscope
TP(VC)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.3
±
0.3Vp-p
TP (VC)
TP (RF)
TP (FE)
IC721
– BD Board (Conductor side) –
TP (TE)
TP (VC)
TP (RF)
TP (FE)
IC721
– BD Board (Conductor side) –
• HCD-GX25/RG220: Except AEP, UK, Russia Model
• HCD-RG220: AEP, UK, Russia Model
23
HCD-GX25/RG220
SECTION 5
DIAGRAMS
5-1. IC PIN DESCRIPTIONS
• IC309 BU2099FV (MULTI CONTROLLER) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
VSS
—
Ground pin
2
NC
—
Not used. (Open)
3
DATA
I
Serial data input from the tape mechanism controller
4
CLOCK
I
Serial data transfer clock signal input from the system controller
5
LCK
I
Serial data latch pulse clock signal input from the system controller
6
REC
O
Recording on/off control signal output “L”: recording
7
BIAS
O
Recording bias on/off control signal output “L”: bias on
8
A/B
O
Deck-A/B selection signal output to the deck-A/B select switch
“L”: deck-B, “H”: deck-A
9
PB MUTE
O
Playback muting on/off control signal output to the recording/playback equalizer
amplifier “H”: muting on
10
REC MUTE
O
Recording muting on/off control signal output to the recording/playback equalizer
amplifier “L”: muting on
11
TUNER MUTE
O
Tuner muting on/off control signal output to the tuner unit “H”: muting on
12
LM-R (CD)
O
Loading motor drive signal output
13
LM-L (CD)
O
Loading motor drive signal output
14
TM-R (CD)
O
Table motor drive signal output
15
TM-L (CD)
O
Table motor drive signal output
16
SP RELAY
O
Front speaker on/off relay drive control signal output “L”: front speaker on
17
LINK/MATRIX
O
Surround speaker on/off relay drive control signal output “H”: surround speaker on
18
SO
O
Serial data output to the bass boost controller
19
OE
—
Not used. (Connect to ground.)
20
VDD
—
Power supply pin (+3.3 V)
24
HCD-GX25/RG220
• IC310 BU2099FV (BASS BOOST CONTROLLER) (MAIN BOARD) (HCD-RG220: AEP, UK, RUSSIA MODEL)
Pin No.
Pin Name
I/O
Pin Description
1
VSS
—
Ground pin
2
NC
—
Not used. (Open)
3
DATA
I
Serial data input from the multi controller
4
CLOCK
I
Serial data transfer clock signal input from the system controller
5
LCK
I
Serial data latch pulse clock signal input from the system controller
6 to 8
NC
—
Not used. (Open)
9
MOTOR VCC
O
Motor power control signal output “L”: motor power on
10
SOL A
O
SOL-A control signal output
11
SOL B
O
SOL-B control signal output
12
LINE OUT MUTE
O
Line out mute signal output terminal “H”: mute on Not used in this set. (Open)
13
CD MUTE
O
CD mute signal output terminal “H”: mute on Not used in this set. (Open)
14 to 16
CONT 1 to 3
O
Bass boost control signal output “H”: bass boost Not used in this set. (Open)
17
NC
—
Not used. (Open)
18
SO
O
Serial data output Not used. (Open)
19
OE
—
Not used. (Connect to ground.)
20
VDD
—
Power supply pin (+3.3 V)
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