DOWNLOAD Sony HCD-V8800 / LBT-V8800AV Service Manual ↓ Size: 10.44 MB | Pages: 89 in PDF or view online for FREE

Model
HCD-V8800 LBT-V8800AV
Pages
89
Size
10.44 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-v8800-lbt-v8800av.pdf
Date

Sony HCD-V8800 / LBT-V8800AV Service Manual ▷ View online

— 5 —
2.
Aging Mode in Tape Deck Section
2-1.  Operating procedure of Aging Mode
1. Load a commercially available 10-minute tape into the decks
A and B respectively.
(If a 10-minute tape is not available, another tape may be
used but a cycle time will be longer.)
2. Select the function “TAPE”.
3. Rewind tapes in advance by pressing  
0  button respec-
tively on decks A and B.
4. Press three buttons  SPECTRUM ANALYZER  ,  ENTER  ,
and  KARAOKE PON/MPX  simultaneously.
5. Press  
·  button on deck A.  (This button triggers the aging
mode.)
6. The aging mode is activated if “AGING A” is displayed on
the fluorescent indicator tube.
7. In the aging mode, the aging is executed in a sequence given
in “2-2.  Operation during Aging Mode”.
The aging continues unless an alarm occurred.
8. To exit from the aging mode, press  POWER  button to turn
the set OFF.
2-2.  Operation during Aging Mode
In the aging mode, the program is executed in the following se-
quence.
1. A tape on FWD side is played for one minute.
2. PAUSE STOP is made.
3. Recording is made for 3 minutes. (For the deck not having
the record function, the play is executed.)
4. FF is executed up to the end of tape.
5. A tape is reversed, and the tape on REV side is played for
one minute.
6. PAUSE STOP is made.
7. Recording is made for 3 minutes.  (For the deck not having
the record function, the play is executed.)
8. FF is executed up to the end of tape.
9. Steps 1 through 8 are executed for the other deck.
10. Steps 1 through 9 are repeated unless an alarm occurred.
2-3.  Deck Selection Sequence
• During the aging mode, decks are selected in the following se-
quence:
Deck A (FWD) 
 Deck A (REV)
Deck B (REV) 
 Deck B (FWD)
SELF-DIAGNOSIS
This model has the self-diagnosis function for the VIDEO and
AUDIO decoder sections.
Immediately after the power on, the self-diagnosis function searches
each operation of IC’s around the mechanism control microcom-
puter (IC701).
The results can be checked by connecting an oscilloscope to TP709
(LED) of the VIDEO board.
Oscilloscope (Waveform)
Symptom
H
L
Light
H
L
1 time blinking
H
L
3 time blinking
No error
DRAM (IC251) error
H
L
2 time blinking
External SRAM (IC751)
error
MPEG decoder (IC201)
error
oscilloscope
VIDEO board
TP709 (LED)
+
Note: The LED for check (D701) is mounted to some sets
(FORMER TYPE). In this case, confirm the lighting condi-
tion of LED.
[VIDEO BOARD] (SIDE A)
[VIDEO BOARD] (SIDE B)
X901
TP709 (LED)
IC751
IC251
D701
IC771
— 6 —
SECTION  2
GENERAL
Front Panel
1
2 3
4
5 6
7
8
@™
9
0
!•
!∞


!™
#∞
#™
#º @ª @•
@¶ @§

@∞
#•


$™
$∞
%™

%∞
%• %ª
^™
&™



^•
^∞


$•
— 7 —
SECTION  3
DISASSEMBLY
Note:
 Follow the disassembly procedure in the numerical order given.
3-1. FRONT PANEL
1
 Three flat type wires
(CN401, CN402, CN701)
3
 Front panel
2
 Four screws (BVTP3x8)
LOCATION OF PARTS AND CONTROLS
1 POWER button
2 DISPLAY/DEMO button
3 SPECTRUM ANALYZER button
4 Display Window
5 ENTER/NEXT button
6 TUNER MEMORY button
7 TUNING MODE button
8 TUNER/BAND button
9 TUNING (+/–) button
!º STEREO/MONO button
!¡ SLEEP button
!™ DAILY 2 button
!£ DAILY 1 button
!¢ t/CLOCK SET button
!∞ REC button
!§ WAVE button
!¶ DSP button
!• Equalizer indicators
!ª PRO LOGIC button
@º EFFECT button
@¡ GROOVE button
@™ FUNCTION button
@£ VOLUME control
@¢ SUPER WOOFER button
@∞ SUPER W MODE button
@§ GEQ control buttons
@¶ GEQ CONTROL button
@• ENTER button
@ª P FILE MEMORY button
#º # button
#¡ KEY CONTROL indicator
#™ ˜ button
#£ KARAOKE PON/MPX button
#¢ PHONES jack
#∞ ECHO LEVEL knob
#§ MIC 1, MIC 2 jacks
#¶ MIC LEVEL knob
#• Deck B ª, · button
#ª Deck B 0, ) button
$º Deck B r REC button
$¡ Deck B P button
$™ CD SYNC button
$£ Deck B 6 EJECT button
$¢ H SPEED DUB button
$∞ Deck B p button
$§ Deck A 0, ) button
$¶ Deck A 6 EJECT button
$• DOLBY NR button
$ª DIRECTION button
%º Deck A p button
%¡ Deck A ª, · button
%™ 6 OPEN button
%£ CD · button
%¢ CD p button
%∞ CD P button
%§ DISC SKIP button
%¶ CD FLASH button
%• 1/ALL DISCS button
%ª PLAY MODE button
^º CD 0, ) button
^¡ REPEAT button
^™ ≠ AMS ± dial
^£ EDIT button
^¢ NEXT button
^∞ AUTO PBC indicator
^§ PREV button
^¶ PBC indicator
^• ˆ RETURN button
^ª VCD indicator
&º CD LOOP button
&¡ CD NON-STOP button
&™ DISC1-DISC5 buttons
— 8 —
3-2. MAIN BOARD
3
 Three screws 
(BVTP2.6x8)
2
 Open the cassette lids.
1
 Push the two buttons.
4
 Three screws (BVTP2.6x8)
5
 Remove the tape mechanism deck
section to direction of the arrow 
A
.
A
3-3. TAPE MECHANISM DECK
9
 Connector 
(CN601)
4
 Power cord
5
 Back panel
3
 Seven screws (BVTP3x8)
2
 Eleven screws
     (BVTP3x8)
1
 Flat type wire (CN1)
 MAIN board
6
 Connector 
(CN961)
Wire clamp
Ferrite core
Bushing cord
Power transformer  
8
 Connector 
(CN830)
!™
 Connector 
(CN901)
 Two screws 
(BVTP3x8)
0
 Connector 
(CN9001)
7
 Flat type wire 
(CN801)
Installing the power cord for the 
Chinese model.
Page of 89
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