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Model
SLV-ED1ME SLV-ED1PS SLV-ED1SG SLV-ED2SA SLV-ED3AF SLV-ED4ME SLV-ED4PS SLV-ED4SG SLV-ED5ME SLV-ED6ME SLV-ED6PS SLV-ED6SG SLV-ED7FS SLV-ED7MI SLV-ED7MN SLV-EZ1AZ SLV-EZ4AZ SLV-EZ7AS SLV-EZ7NZ
Pages
55
Size
1.57 MB
Type
PDF
Document
Service Manual
Brand
Device
VCR
File
slv-ed1me-slv-ed1ps-slv-ed1sg-slv-ed2sa-slv-ed3af-.pdf
Date

Sony SLV-ED1ME / SLV-ED1PS / SLV-ED1SG / SLV-ED2SA / SLV-ED3AF / SLV-ED4ME / SLV-ED4PS / SLV-ED4SG / SLV-ED5ME / SLV-ED6ME / SLV-ED6PS / SLV-ED6SG / SLV-ED7FS / SLV-ED7MI / SLV-ED7MN / SLV-EZ1AZ / SLV-EZ4AZ / SLV-EZ7AS / SLV-EZ7NZ Service Manual ▷ View online

6-1 E
SECTION  6
ERROR  CODES
SLV-ED1/ED2/ED3/ED4/ED5/ED6/ED7/EZ1/EZ4/EZ7
This set displays an error code, and a mode code in case of error
on the display tube, if the operation stopped by error.
The following provides description concerned.
A: Error code ............................................................... Table 6-1
B: Mode code in case of error .................................... Table 6-2
These codes are displayed at lower 5-digit positions of display
tube.
In this case, “ : ” between digits is not displayed.
Table 6-1.
Error Codes
Table 6-2.
Mode Codes in Case of Error
Display tube (lower 5 digits)
A
B
Code
Description
0
NO ERROR
1
CAM ENCODER ERROR, LOAD DIRECTION
2
CAM ENCODER ERROR, UNLOAD DIRECTION
3
T REEL ERROR
4
S REEL ERROR
5
CAPSTAN ERROR
6
DRUM ERROR
7
INITIALIZE ERROR
8
CASSETTE UNLOADING ERROR
9
RESERVED
Code
Description
0
EJECT (POWER ON)
1
EJECT (POWER OFF)
2
UNLOAD STOP
3
STOP (POWER ON)
4
POWER OFF (CASSETTE IN)
5
F. FWD
6
REW
7
LOW SPEED F. FWD
8
LOW SPEED REW
9
STANDBY
10
REC
11
REC (VISS)
12
REC PAUSE
13
PLAY
14
A. DUB
15
A. DUB PAUSE
16
CUE
17
REV
18
STILL (MECHA FWD)
19
FWD FRAM BY FRAM (FWD SLOW)
20
STILL (MECHA RVS)
21
RVS FRAM BY FRAM (RVS SLOW)
7-1
SECTION  7
ADJUSTMENTS
1
2
3
4
Mode
SP
SP
EP
EP
Video signal
Color bar
Monoscope
Color bar
Monoscope
Audio signal
(HiFi/Normal)
400 Hz
Time
Seven minutes
Three minutes
Seven minutes
Three minutes
7-1. MECHANICAL  ADJUSTMENTS
Refer to the SERVICE  MANUAL of VHS MECHANICAL AD-
JUSTMENT VI.
7-2. ELECTRICAL  ADJUSTMENTS
2-1.
PRE-ADJUSTMENT  PREPARATIONS
Necessary items and indications for total adjustment of electric
circuit of this machine will be described in this chapter.
2-1-1.
Instruments to be Used
1) Color TV
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz, de-
lay mode, as provided.
3) NTSC pattern generator
4) PAL pattern generator
5) Digital voltmeter
6) Audio level meter
7) Audio noise meter
8) Audio generator
9) Attenuator
10) Alignment tape
Part Code:  8-192-605-36 KRV-51P (PAL)
Part Code:  8-192-605-32 KRV-51N2 (NTSC)
2-1-2.
Connection
Unless otherwise specified, connect and adjust the measuring in-
struments as shown in the following diagram.
During the adjustment, see the Parts Arrangement
Diagram for Adjustments on Page 7-6.
Fig. 7-2-2
2-1-4.
Alignment Tapes
[Alignment Tape (KRV-51N2 / KRV-51P)]
2-1-3.
Set-up of Adjustment
In this adjustment, PAL or NTSC pattern generator is connected
with LINE input signal terminal. When check to tuner, connected
AERIAL terminal. Check that the amplitudes of video signal SYNC
signal, of picture portions, and of burst signals are flat at
approximately 0.3, 0.7 and 0.3 V, respectively, and that the level
ratio of the burst signal and “red” signal are 0.30: 0.66. Fig. 7-2-2.
shows video signals (color bars) used in adjusting the video section.
PAL
NTSC
Video output
(75 
)
Pattern generator
VCR
VIDEO LINE IN
Monitor TV
VIDEO LINE OUT
SLV-ED1/ED2/ED3/ED4/ED5/ED6/ED7/EZ1/EZ4/EZ7
Fig.  7-2-1
2-1-5.
Specified I/O Level and Impedance
Input/output terminal
Video inputs
LINE IN
: phono jack
1 Vp-p, 75 
, unbalanced, sync negative
Audio inputs
LINE IN
: phono jacks
47 kW, –7.5 dBs (0 dBs = 0.775 Vrms)
More than 10 kW, –4 dBs
Video outputs
LINE OUT : phono jack
1 Vp-p, 75 
, unbalanced, sync negative
Audio outputs
LINE OUT : phono jacks
–7.5 dBs at load impedance 47 k
Output impedance : less than 10 
7-2
2-1-6.
Adjusting Sequence
Make the electrical adjustment in the following sequence.
Checking power supply
Servo system adjustment
Audio system adjustment
2-3.
SERVO  SYSTEM  Adjustment
2-3-1.
RF Switching Position Adjustment
 (MA-323 Board)
Purpose:
Adjust the interval between A ch and B ch of tape playback out-
put.
Improve the interchangeability with other tapes and sets.
When it is out of order, the interval appears on the screen, the
screen is disturbed.
Mode
PB
Signal
Alignment tape SP mode
color bar
Measurement Point
CH1: VIDEO LINE OUT
CH2: Pin 2 of CN501
(RF SWP)
Measuring Instrument
Oscilloscope
Specified Value
6.5 ± 0.5 H (416 ± 32 µsec)
PAL
6.5 ± 0.5 H (410 ± 32 µsec)
NTSC
Adjusting Method:
1) Connect MA-323 board JS140 to the GND for about 1 secont
to activate the RF switching position adjustment mode.
2) Check appear “A P” on FL display.
3) Using the channel + and – buttons, adjust to 6.5 ± 0.5 H.
4) Press the pause button.
Fig. 7-2-3.
Mode
E-E
Measuring Instrument
Digital voltmeter
–10 V check
Measurement Point
Pin 9 of CN600
Specified Value
–10.3 ±0.8 V
+6 V check
Measurement Point
Pin 7, 8 of CN600
Specified Value
5.9 ± 0.2 V
+13 V check
Measurement Point
Pin 2, 3 of CN600
Specified Value
13.3 ± 0.5 V
+35 V check
Measurement Point
Pin 1 of CN600
Specified Value
38.0 ± 3.0 V
2-2.
POWER SUPPLY ADJUSTMENT
2-2-1.
Power Supply Check
  HS-921SF/921SF1 BOARD,
  SR-708/718 BOARD
Checking Method:
1) Confirm that each voltage meets its specified value.
2-2-2.
+6 V Adjustment
  HS-921SF/921SF1 BOARD,
  SR-708/718 BOARD
Approx. 1 Vp-p
Approx. 5 Vp-p
V
enargement
CH2
CH1
CH2
CH1
Vertical sync. signal
6.5 
±
 0.5 H
(416 
±
 32 
µ
sec) PAL
(410 
±
 32 
µ
sec) NTSC
Mode
REC or PB
Measuring Instrument
Digital voltmeter
Measurement Point
Pin 7, 8 of CN201
Adjusting Element
RV201 (HS-921SF/921SF1
BOARD)
VR201 (SR-708/718
BOARD)
Specified Value
5.9 ± 0.2 V
7-3
2-4.
AUDIO  SYSTEM  ADJUSTMENTS
• Adjust both Lch and Rch.
[Connection]
Fig. 7-2-4.
2-4-1.
Hi-Fi Audio System Adjustment
(SLV-ED6/ED7/EZ7)
• Set switches and knobs to the following positions to make ad-
justment unless otherwise specified.
INPUT SELECT switch ................... LINE
AUDIO MONITOR .......................... STEREO
[Adjustment Sequence]
1. AF Switching Position Adjustment
2. Frequency Responce Check
3. Overall Level Characteristic and Distortion Factor
Check
4. Overall S/N Check
1.
AF Switching Position Adjustment (MA-323 Board)
Purpose:
Adjust the interval between A CH and B CH of tape playback
output.  Improve the interchangeability with other tapes and sets.
When it is out of order, noisy sound is increased and big noise is
heard.
Mode
PB
Signal
Alignment tape SP mode
color bar
Measurement point
CH1: Pin 2 of  CN501
CH2: Pin 1 of CN341
Measuring Instrument
Oscilloscope
Specified Value
Fig. 7-2-5
Adjusting Method:
1) Connect MA-323 board JS140 to the GND for about 1 secont
to activate the RF switching position adjustment mode.
2) Press the record button to activate the AF switching position
adjustment mode.
3) Check appear “A H” on FL display.
4) Using the channels + and – buttons, minimize a chipped por-
tion.  At this time, confirm that a noisy sound is not heard.
5) Press the pause button.
Fig. 7-2-5.
2.
Frequency Responce Check
Purpose:
Confirm that the frequency characteristic is within the specifica-
tion.
Mode
REC and PB (SP, LP mode)
Signal
400 Hz, –7.5 dBs
20 Hz, –7.5 dBs
20 kHz, –7.5 dBs
Measurement point
Audio output terminal
Measurement equipment
Audio level meter
Specified value
0 ± 2 dB
Note:
Tape path adjustment must have been completed.
Confirmation Method:
1) Supply a signal of 400 Hz, –7.5 dBs to both L and R channels
of Audio Line Input.
2) Connect the audio level meter to the Audio Line Output.
3) Adjust the attenuator so that the audio level meter will indi-
cate –7.5 dBs.
4) Make recording.
5) Set an audio line input signal to 20 Hz and make recording.
6) Set an audio line input signal to 20 kHz and make recording.
7) Playback a recorded portion, and measure output levels at 400
Hz and 20 Hz and 20 kHz.
8) Confirm that the 20 Hz and 20 kHz playback output level within
a range of the 400 Hz playback output level 0 ± 2 dB.
Audio
generator
Attenuator
600 
47 k
VCR
Audiolevel meter or
distortion meter
AUDIO LINE OUT
AUDIO LINE IN
   Feed signal both 
   channelssimultaneously.
CH2
CH1
RF SWP
OK
NG
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