DOWNLOAD Sony SLV-L44AR / SLV-L66HFAR Service Manual ↓ Size: 6.28 MB | Pages: 68 in PDF or view online for FREE

Model
SLV-L44AR SLV-L66HFAR
Pages
68
Size
6.28 MB
Type
PDF
Document
Service Manual
Brand
Device
VCR
File
slv-l44ar-slv-l66hfar.pdf
Date

Sony SLV-L44AR / SLV-L66HFAR Service Manual ▷ View online

6-1
SECTION 6
ELECTRICAL ADJUSTMENTS
CIRCUIT BOARDS LOCATION
CP-1 PWB Assembly
VP-1 PWB Assembly
3 in 1 Tuner
(Tuner / IF / RF Conv.)
TM-1 PWB
TM-2 PWB
SLV-L44AR/L66HFAR
6-2
SELF-DIAGNOSIS DISPLAY
This unit displays the diagnosis contents of abnormalities and the mechanism mode on its display panel in 2-digit numbers.
These display shows the outline of the problems. Use it as a reference when servicing the unit.
1. Self-Diagnosis Contents and Mechanism Mode Display
• When the STOP button on the remote control is pressed for about 10 seconds continuously, the self- diagnosis number
will be displayed on the reception channel display of the display panel and number indicating the failed mechanism mode
(changed mode when being shifted) on the tape counter “seconds” display for 10 seconds each.
• During self-diagnosis display, displays other than the diagnosis number/mechanism mode number will be turned off and
when displays end, the normal display will be returned automatically.
• Refer to “Self-Diagnosis Contents” for the self-diagnosis numbers and the “Mechanism Mode Display Contents” for the
mechanism mode numbers.
• When the “0” button on the remote control unit is pressed during display, and clearing the self-diagnosis display and
mechanism mode display.
Display panel
Self-Diagnosis number
(Reception channel display)
Mechanism mode number
(Tape counter “Seconds” display)
No.
Problem
Main Possible Cause
Mechanism Operations and
State After Occurrence
00 There is no abnormality in the mechanism.
The cylinder motor does not rotate.
• The cylinder motor is faulty.
Shifts to the STOP mode.
01
• The control of the cylinder motor is
   faulty.
• The tape winds around the cylinder.
The take-up reel does not rotate.
• The take-up reel is caught.
Shifts to the STOP mode.
02
• The reel belt is faulty.
• The take-up torque has decreased.
The capstan motor does not rotate.
• The capstan motor is faulty.
Shifts to the STOP mode.
03
• The control of the capstan motor is
   fauIty .
The tape cannot be loaded with the
• Error in the operations of the tape
Unloads, shifts to the INITIAL mode,
cassette inserted.
  loading mechanism.
and the power goes off.
(But unloading can be performed.)
• Foreign particles in the tape
04
   loading mechanism.
• The tape end sensor is faulty.
• The reel brake of the tape cassette
   has not been released.
Tape loading and unloading cannot
• The tape guide is caught.
The power is forcibly turned off with
05
be performed with the cassette
• The loading motor is faulty.
 the mechanism at its current position.
inserted.
• The control of the loading motor is
   faulty.
Self-Diagnosis Contents
6-3
No.
Problem
Main Possible Cause
Mechanism Operations and
State After Occurrence
Front unloading cannot be performed • The cassette drive mechanism is
Front loads and shifts to the STOP or
when ejecting the cassette.
   faulty .
INITIAL mode.
(Front loading can be performed.)
• The front door is caught.
• When the power switch is turned on
  before eject operations: Shifts to the
06
  STOP mode.
• When the power switch is turned off
  before eject operations: Shifts to the
  INITIAL mode and the power goes
  off.
Front loading and front unloading
• The tape cassette is caught in the
The power is forcibly turned off with
cannot be performed when ejecting
  cassette drive mechanism.
the mechanism at its current position.
the cassette.
• The main cam and front rack gear of
07
  the front loading mechanism have
  not engaged properly.
• The gears of the front loading drive
  mechanism have not engaged
  properly.
The mechanism becomes 1(REVIEW)
• The mechanism mode switch
The power is forcibly turned off with
08
while moving from 2 (IDLER),
  contact is faulty.
the mechanism at its current position.
3 (STILL), 4 (BRAKE), and to
5 (STOP).
The mechanism becomes 7 (INITIAL)
• The mechanism mode switch
Carries out tape take-up operations,
09
while moving from 1 (REVIEW),
  contact is faulty.
shifts to the INITIAL mode,
2 (IDLER), 3(STILL), 4 (BRAKE),
and the power goes off.
and to 5 (STOP).
Capstan will not turn during
Capstan is defective
01 (ST-BY)
10 cassette insertion
The capstan will not rotate when
Cylinder is defective
01 (ST-BY)
the cassette is inserted.
11 If neither the capstan or cylinder will
rotate, a “ 10 “ appears on the self-
diagnosis message.
Note: 
For details of mechanism operations corresponding to the mechanism positions of the self-diagnosis numbers 08
and 09 above, refer to the separate volume on the V95 I mechanism manual.
These manual reference numbers are shown in the cover.
Mechanism Mode Display Contents
Mode No.
Mechanism Mode
Mode No.
Mechanism Mode
Mode No.
Mechanism Mode
00
CASSETTE OUT
08
PLAY
16
VIDEO INSERT
01
STANDBY
09
REC
17
VIDEO INSERT – PAUSE
02
STOP
10
AUDIO DUBBING
18
AUDIO/VIDEO INSERT
03
STILL
11
X2 SPEED PLAY
19
REVERSE X2 SPEED PLAY
04
REC-PAUSE
12
CUE
05
AUDIO DUBBING – PAUSE
13
REVIEW
06
FRAME ADVANCE
14
FAST FORWARD
07
SLOW
15
REWIND
99
OTHERS
6-4
2. ELECTRICAL ADJUSTMENT
VCR PRESETTING
This VCR need three basic presetting by using the menus displayed on-screen. After all connection have been made, then
follow steps 1 to 3 to preset the VCR.
The three presetting steps will be displayed in sequence on TV screen. The setting are entered with the remote control.
Turn on the VCR
1. Adjusting the TV receiver to the video channel: The AUTO SET-UP screen will appear. When the video channel has
been preset, press the OK button on the remote control.
2. Country selection: Using the numeric button, select the country of use.
3. Language selection: When the desired language has been select, press the MENU / TV button directly before prevent
auto tuning will start.
When steps 1 to 3 have been finish, ready to operate the all operating mode.
2-1. SERVO CIRCUIT ADJUSTMENT
• These adjustments should be done upon completion of the tape transport adjustments.
• If the tape transport adjustments (except the tilt adjustment) are done after these adjustments, follow the procedures
again in section 2-1-3, “Switching position adj.”
• When a cassette tape is loaded, auto-tracking will be set immediately after starting the first playback. To adjust servo
circuit, set back to the manual tracking condition, and set the tracking to the center position.
2-1-1 . TEST EQUIPMENT AND STANDARDS REQUIRED
Oscilloscope
Vertical sensitivity
: 5 mV/DIV, external trigger
Bandwidth
: more than 10 MHz
Alignment Tape
MH-2 (H-7099-052-H)
: SP mode, monoscope. 6 KHz
Blank Tape
VHS-type cassette tape
Monitor TV
2-1-2. LOCATION OF ADJUSTMENT POINTS
CP-1 PWB (Foil side)
VR351
TP101
Fig. 2-1-1
Page of 68
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