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SLV-ED212/ED717/ED818/ED919/LF1
6-1E
SECTION 6
ERROR CODE
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.
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
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.
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 FRAME BY FRAME (FWD SLOW)
20
STILL (MECHA RVS)
21
RVS FRAME BY FRAME (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
ADJUSTMENT VI.
ADJUSTMENT 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.
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, delay
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz, delay
mode, as provided.
3) NTSC pattern generator
4) Digital voltmeter
5) Audio level meter
6) Audio noise meter
7) Audio generator
8) Attenuator
9) Alignment tape
4) Digital voltmeter
5) Audio level meter
6) Audio noise meter
7) Audio generator
8) Attenuator
9) Alignment tape
Part Code: 8-192-605-32 KRV-51N2
2-1-2.
Connection
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
instruments as shown in the following diagram.
Fig. 7-2-1
During the adjustment, see the Parts Arrangement
Diagram for Adjustments on Page 7-6.
Diagram for Adjustments on Page 7-6.
Fig. 7-2-2
2-1-4.
Alingment Tapes
[Alignment Tape (KRV-51N2/KRV-51P)]
2-1-3.
Set-up of Adjustment
In this adjustment, NTSC pattern generator is connected with LINE
input signal terminal. When checking with 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.
input signal terminal. When checking with 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.
NTSC
2-1-5.
Specified I/O Level and Impedance
Input/output terminal
Video inputs
Video inputs
LINE IN
: phono jack
1 Vp-p, 75
Ω, 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
More than 10 kW, –4 dBs
Video outputs
LINE OUT : phono jack
1 Vp-p, 75
1 Vp-p, 75
Ω, unbalanced, sync negative
Audio outputs
LINE OUT : phono jacks
–7.5 dBs at load impedance 47 k
–7.5 dBs at load impedance 47 k
Ω
Output impedance : less than 10
Ω
SLV-ED212/ED717/ED818/ED919/LF1
Video output
(75
Ω)
Pattern generator
VCR
VIDEO LINE IN
Monitor TV
VIDEO LINE OUT
Approx. 1 Vp-p
Approx. 5 Vp-p
V
enlargement
CH2
CH1
CH2
CH1
Vertical sync. signal
6.5 ± 0.5 H
(410 ± 32 µsec) NTSC
(410 ± 32 µsec) NTSC
7-2
2-1-6.
Adjusting Sequence
Make the electrical adjustment in the following sequence.
2-3.
SERVO SYSTEM ADJUSTMENT
2-3-1.
RF Switching Position Adjustment
(MA-402 BOARD)
(MA-402 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, the interval appears on the screen, the screen
is disturbed.
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, the interval appears on the screen, the screen
is disturbed.
Mode
PB
Signal
Alignment tape SP mode
color bar
color bar
Measurement Point
CH1: Pin 2 of CN202
CH2: Pin 3 of CN202
(RF SWP)
CH2: Pin 3 of CN202
(RF SWP)
Measuring Instrument
Oscilloscope
Specified Value
6.5 ± 0.5 H (410 ± 32 µsec)
NTSC
Adjusting Method:
1) Connect MA-402 board JS401 to the GND for about 1 second
1) Connect MA-402 board JS401 to the GND for about 1 second
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.
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
+F, –F check
Measurement Point
Between JL 615 (IF) and JL 614 (-F)
Specified Value
3.0 ± 1.0 V
–13 V check
Measurement Point
JL 625
Specified Value
–11.0 ± 1.5 V
+6 V check
Measurement Point
JL 611
Specified Value
5.95 ± 0.3 V
+13 V check
Measurement Point
JL 604
Specified Value
13.5 ± 1.0 V
+38 V check
Measurement Point
JL 618
Specified Value
32.0 ± 4.0 V
2-2.
POWER SUPPLY ADJUSTMENT
2-2-1.
Power Supply Check
Checking Method:
1) Confirm that each voltage meets its specified value.
1) Confirm that each voltage meets its specified value.
Power supply adjustment
Servo system adjustment
Audio system
adjustment
Tuner system
adjustment
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-ED818/ED919/LF1)
(SLV-ED818/ED919/LF1)
• Set switches and knobs to the following positions to make
adjustment unless otherwise specified.
INPUT SELECT switch ................... LINE
AUDIO MONITOR .......................... STEREO
INPUT SELECT switch ................... LINE
AUDIO MONITOR .......................... STEREO
[Adjustment Sequence]
1. AF Switching Position Adjustment
2. Frequency Response Check
3. Overall Level Characteristic and Distortion Factor
1. AF Switching Position Adjustment
2. Frequency Response Check
3. Overall Level Characteristic and Distortion Factor
Check
4. Overall S/N Check
1.
AF Switching Position Adjustment
(MA-402 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.
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
color bar
Measurement point
CH1: Pin 3 of CN202
CH2: Pin 1 of CN202
CH2: Pin 1 of CN202
Measuring Instrument
Oscilloscope
Specified Value
Fig. 7-2-5
Adjusting Method:
1) Connect MA-402 board JS401 to the GND for about 1 second
1) Connect MA-402 board JS401 to the GND for about 1 second
to activate the RF switching position adjustment mode.
2) Press the PLAY 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 portion.
4) Using the channels + and – buttons, minimize a chipped portion.
At this time, confirm that a noisy sound is not heard.
5) Press the pause button.
Fig. 7-2-5.
2.
Frequency Response Check
Purpose:
Confirm that the frequency characteristic is within the specification.
Confirm that the frequency characteristic is within the specification.
Mode
REC and PB (SP, EP mode)
Signal
400 Hz, –17.5 dBs
20 Hz, –17.5 dBs
20 kHz, –17.5 dBs
20 Hz, –17.5 dBs
20 kHz, –17.5 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, –17.5 dBs to both L and R channels
1) Supply a signal of 400 Hz, –17.5 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 indicate
3) Adjust the attenuator so that the audio level meter will indicate
–17.5 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
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.
CH2
CH1
RF SWP
RF SWP
OK
NG
Audio
generator
generator
Attenuator
600
Ω
47 k
Ω
VCR
Audio level meter or
distortion meter
AUDIO LINE OUT
AUDIO LINE IN
Feed signal both
channelssimultaneously.
Feed signal both
channelssimultaneously.
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