Sony HCD-GX8000 / HCD-RG77 Service Manual ▷ View online
HCD-GX8000/RG77
16
1) Display of total error
EMC**: The number of mechanical error.
EDC**: The number of no disc error after chucking the disc.
EDC**: The number of no disc error after chucking the disc.
2) Display of mechanical errors
M*: The number of mechanical error (“00” is latest one)
(Press the
.
or
>
button to changes next error display)
$$: Not used
%%: Loading error (Second figure is not used)
%%: Loading error (Second figure is not used)
D: The error in the midst of close at the except mechanical
trouble.
E: The error in the midst of open at the except mechanical
trouble.
C: The error in the midst of chucking up at the except
mechanical trouble.
F: The error in the midst of chucking down at the except
mechanical trouble.
&&: Loading error
01: The error in the midst of chucking up.
02: The error in the midst of chucking down.
03: Time-out of EX-open.
05: Time-out of EX-close.
02: The error in the midst of chucking down.
03: Time-out of EX-open.
05: Time-out of EX-close.
##: Not used
3) Display of no disc errors
D*: The number of mechanical error(“00” is latest one)
(Press the
.
or
>
button to changes next error display)
$$: Error type
01: Focus error
02: GFS error
03: Set up error
02: GFS error
03: Set up error
%%: Not used
&&:
&&:
00: No disc judgment without chucking retry.
01: No disc judgment after chucking retry.
01: No disc judgment after chucking retry.
##: The state when judged no disc error
01: Stop
02: Set up
03: TOC read
04: Access
05: Play
06: Pause
07: Manual search (Play)
08: Manual search (Pause)
02: Set up
03: TOC read
04: Access
05: Play
06: Pause
07: Manual search (Play)
08: Manual search (Pause)
Display
EMC**EDC**
Display
M*$$%%&&##00
Display
D*$$%%&&##00
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
“TAPE A AG-1”
Shut off
FWD play the tape A
“TAPE A AG-2”
2 minutes
Fast forward the tape A
“TAPE A AG-3”
Shut off or 20 seconds
REV play the tape A
“TAPE A AG-4”
2 minutes
Rewind the tape A
“TAPE A AG-5”
Shut off
FWD play the tape B
“TAPE B AG-2”
2 minutes
Fast forward the tape B
“TAPE B AG-3”
Shut off or 20 seconds
REV play the tape B
“TAPE B AG-4”
2 minutes
Rewind the tape B
“TAPE B AG-5”
Shut off
Note:
“TAPE
*
AG-
*
” is display of each step.
[CD REPEAT 5 LIMIT OFF MODE]
Number of repeat for CD playback is 5 times when the repeat mode
is “REPEAT”. This mode enables CD to repeat playback for limitless
times.
Procedure:
1. Press the
is “REPEAT”. This mode enables CD to repeat playback for limitless
times.
Procedure:
1. Press the
?/1
button to turn the power on, and press the
[CD]
button to select the function “CD”.
2. Press three buttons of
x
,
[REPEAT]
, and
[CD]
simultaneously
to enter the CD repeat 5 limit off mode and display “REPEAT
OFF”.
OFF”.
3. To release this mode, operate the cold reset. (Refer to the “MC
COLD RESET”)
HCD-GX8000/RG77
17
[CD SHIP MODE (MEMORY CLEAR) ]
• 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. Set to the standby state.
2. Press three buttons
1. Set to the standby state.
2. Press three buttons
x
,
[ENTER]
and
[GAME]
simultaneously.
3. After the “STANDBY” display blinks, a message “LOCK” is
displayed on the fluorescent indicator tube, and the CD ship
mode is set.
mode is set.
[CD SHIP MODE (NO MEMORY CLEAR) ]
• 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. Set to the standby state.
2. Press the
1. Set to the standby state.
2. Press the
[CD]
and
?/1
buttons simultaneously.
3. After the “STANDBY” display blinks, a message “LOCK” is
displayed on the fluorescent indicator tube, and the CD ship
mode is set.
mode is set.
18
HCD-GX8000/RG77
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
0 dB=0.775 V
DECK SECTION
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
should be completed before performing recording circuit
adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
• Test Tape
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
DECK A DECK B
Note:
Perform this adjustments for both decks
Procedure:
1. Mode: Playback
1. Mode: Playback
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
set
MAIN board
CN301
Pin
CN301
Pin
1
(L-CH)
Pin
3
(R-CH)
MAIN board
CN301
Pin
CN301
Pin
2
(GND)
+
–
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
WS-48B
3 kHz, 0 dB
Tape Speed Adjustment
19
HCD-GX8000/RG77
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
so that outputs match within 1dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
TAPE SPEED ADJUSTMENT
DECK B
Note:
Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the
mode.
In the test mode, the tape speed is high during pressing the
[CD SYNC HI-DUB]
button.
Procedure:
1. Press
1. Press
?/1
button to turn the set ON.
2. Press three buttons
x
,
[ENTER]
and
[DISC 3]
simultaneously.
To release from the test mode, press the
?/1
button.
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the hH button on the deck B.
3. Press the
2. Press the hH button on the deck B.
3. Press the
[CD SYNC HI-DUB]
button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the SW board so that frequency counter reads
6,000
±
180 Hz.
5. Press the
[CD SYNC HI-DUB]
button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the SW board so that frequency counter reads
3,000
±
90 Hz.
Adjustment Location: SW board
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
MAIN
board
CN301
set
board
CN301
set
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
pin
3
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
pin
2
pin
1
L
R
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
MAIN board
CN301 Pin
CN301 Pin
2
(GND)
MAIN board
CN301
Pin
CN301
Pin
1
(L-CH)
Pin
3
(R-CH)
frequency counter
forward
reverse
Click on the first or last page to see other HCD-GX8000 / HCD-RG77 service manuals if exist.