Sony SLV-AV100B / SLV-AV100NP / SLV-AV100UX / SLV-AV100VC Service Manual ▷ View online
8-5
2-3. POWER SUPPLY CHECK
2-3-1. Output Voltage Check 1 (PS-379 Board)
Mode
E-E
Measuring
Digital voltmeter
instrument
+ FV check
Measurement
CN202 pin4 (GND : pin1)
point
Specified
4.3±1.0Vdc
value
- 30V check
Measurement
CN202 pin2
point
Specified
– 30±3Vdc
value
- 8V check
Measurement
CN202 pin5
point
Specified
– 13.5±2.0Vdc
value
D 6V check
Measurement
CN202 pin6, CN203 pin7
point
Specified
5.9±0.5Vdc
value
SW 12V check
Measurement
CN202 pin8, CN203 pin9
point
Specified
11.9±0.5Vdc
value
13V check
Measurement
CN202 pin!™, CN203 pin!º!¡
point
Specified
13±1Vdc
value
38V check
Measurement
CN202 pin!£
point
Specified
38±3Vdc
value
SW 5V check
Measurement
CN202 pin!¢, CN203 pin5
point
Specified
5.2±1.0Vdc
value
MTR 12V check
Measurement
CN203 pin12
point
Specified
12.1±1.0Vdc
value
[Check Method]
1) Check that each voltage satisfied the specified value.
1) Check that each voltage satisfied the specified value.
Note :
AC input voltage = 230±5Vac (AC-106 board)
2-3-2. Output Voltage Check 2 (MP-43 Board)
Mode
E-E
Measuring
Digital voltmeter
instrument
40V check
Measurement
CN602 pin4
point
Specified
42±3Vdc
value
- 40V check
Measurement
CN602 pin5
point
Specified
– 42±3Vdc
value
+ UNREG check
Measurement
CN802 pin9
point
Specified
19±1.5Vdc
value
- UNREG check
Measurement
CN802 pin8
point
Specified
– 19±1.5Vdc
value
24V check
Measurement
CN704 pin2
point
Specified
24±2Vdc
value
8-6
2-4. SERVO SYSTEM ADJUSTMENT
2-4-1. RF Switching Position Adjustment (RP-213 Board)
[Adjustment Object]
To adjust the link of the Ach and Bch of the tape playback outputs.
If this specification is not satisfied, the noise will increase and cracking
sounds will be produced.
To adjust the link of the Ach and Bch of the tape playback outputs.
If this specification is not satisfied, the noise will increase and cracking
sounds will be produced.
Mode
Playback
Signal
Alignment tape : Color bar portion
Measurement
CH1 : CN502 pin2 (RF MONI)(RP-213 board)
point
CH2 : CN502 pin3 (RF SWP)(RP-213 board)
Measuring
Oscilloscope
instrument
Adjustment
PROGRAM +/– button
element
Specified
No dropouts in the RF signal
value
[Adjusting Method]
1) Playback the alignment tape. short the adjustment land JL207
1) Playback the alignment tape. short the adjustment land JL207
(MA-283 board) to the ground for 300 msec or more to enter the
RF SWP adjustment mode.
RF SWP adjustment mode.
2) Verify that "AD RF xx (xx : data value)" are indicated on the
display tube.
3) Use PROGRAM +/– buttons to adjust so that the portion A is
minimized.
4) Press PAUSE and write the data.
2-5. SYSTEM CONTROL/TIMER SYSTEM CHECK
2-5-1. Clock Check (MA-283 Board)
[Check Object]
To raise the accuracy of the clock.
If the clock is not accurate, its error difference will gradually increase.
To raise the accuracy of the clock.
If the clock is not accurate, its error difference will gradually increase.
Measurement
IC151 pin7 (BUZZER OUT)
point
Measuring
Frequency counter
instrument
(Interval counter mode)
Specified
0.1249995±0.0000005sec
value
[Check Method]
1) Connect the LANC jig and the adjusting remote commander.
2) Release the protect.
1) Connect the LANC jig and the adjusting remote commander.
2) Release the protect.
Page : 1, Address : 00, Data : 80.
3) Page : 2, Address : 00, Data : 02.
4) Page : 2, Address : 01, Data : 01.
5) After verification, turn the power off once to reset.
4) Page : 2, Address : 01, Data : 01.
5) After verification, turn the power off once to reset.
Fig. 8-2-5.
RF signal dropout (Should be minimized)
A
A
CH1
CN502 pin
CN502 pin
2
CH2
CN502 pin
CN502 pin
3
(RF SWP)
OK
NG
0.1249995±0.0000005sec
(32768.00±0.13Hz) x1/2
Fig. 8-2-6.
16
5V
Buffer
AMP
Divider
(1/256)
(1/256)
Frequency
counter
7
IC151
MA-283 board
High
impedance
probe
IC151 7
2048Hz
2048Hz
5V
0V
10
8
Q8
RST
VSS
CLOCK
13
11
8Hz
interval
counter
interval
counter
TC4020 or eluivalent
8-7
2-6. VIDEO SYSTEM ADJUSTMENTS
For the video system adjustment, follow the adjustment procedures
given below as a rule. The color bar video signal supplied from the
pattern generator is used as the video input signal for the video system
adjustment of the recording mode. Check that the signal satisfies the
specified value designated in the "Check of input signal (Fig. 8-2-2).
[Adjustment Sequence]
1) X'tal OSC Check
2) SYNC AGC Check
3) White Clip/Dark Clip Check
4) REC Y Level Check
5) REC Chrome Level Check
6) Playback Level Check
given below as a rule. The color bar video signal supplied from the
pattern generator is used as the video input signal for the video system
adjustment of the recording mode. Check that the signal satisfies the
specified value designated in the "Check of input signal (Fig. 8-2-2).
[Adjustment Sequence]
1) X'tal OSC Check
2) SYNC AGC Check
3) White Clip/Dark Clip Check
4) REC Y Level Check
5) REC Chrome Level Check
6) Playback Level Check
2-6-1. X'tal OSC Check (MA-283 Board)
Mode
Playback
Signal
Alignment tape : Color bar portion
Measurement
IC301 pin@£
point
Measuring
Oscilloscope and Frequency counter
instrument
Specified
PAL : 4,433619±96Hz
value
Note :
A frequency counter should be connected through a buffer
ampifier (oscilloscope, etc.) having a high impedance and a
low capacitance.
ampifier (oscilloscope, etc.) having a high impedance and a
low capacitance.
[Check Method]
1) Check that the oscillation frequency satisfies the specified value
1) Check that the oscillation frequency satisfies the specified value
and that the oscillation voltage is 450±200mVp-p.
2-6-2. SYNC AGC Check (MA-283 Board)
Mode
E-E
Signal
Color bar
Measurement
Video monitor video output terminal
point
Measuring
Oscilloscope
instrument
Specified
A=2.02±0.14Vp-p
value
[Check Method]
1) Check that the SYNC AGC level (A) satisfies the specified value.
1) Check that the SYNC AGC level (A) satisfies the specified value.
2-6-3. White Clip/Dark Clip Check (MA-283 Board)
Mode
E-E
Signal
Color bar
Measurement
IC301 pin#™
point
Measuring
Oscilloscope
instrument
Specified
White clip : A=190±15%
value
Dark clip : B=52±10%
[Check Method]
1) Check that the white clip level A is 190±15% to the white (100%)
1) Check that the white clip level A is 190±15% to the white (100%)
level.
2) Check that the dark clip level B is 52±10% to the white (100%)
level.
Fig. 8-2-8.
Fig. 8-2-9.
450±200mV
4,433619±96Hz (PAL)
Fig. 8-2-7.
White (100%)
H
A
White (100%)
100%
B
A
H
8-8
2-6-4. REC Y Level Check (MA-283 Board)
Mode
E-E
Signal
Color bar
Measurement
Q352E
point
Measuring
Oscilloscope
instrument
Specified
A=950±100mVp-p
value
[Check Method]
1) Check that the record Y level satisfies the specified value.
1) Check that the record Y level satisfies the specified value.
2-6-5. REC Chroma Level Check (MA-283 Board)
Mode
E-E
Signal
Color bar
Measurement
IC301 pin#º
point
Measuring
Oscilloscope
instrument
Specified
A=160±23mVp-p
value
[Adjusting Method]
1) Check that the record chroma level satisfies the specified value.
1) Check that the record chroma level satisfies the specified value.
2-6-6. Playback Level Check (MA-283 Board)
Mode
Playback
Signal
Alignment tape : Color bar portion
Measurement
Video monitor video output terminal
point
Measuring
Oscilloscope
instrument
Specified
A=1.97±0.18Vp-p
value
[Check Method]
1) Check that the playback level satisfies the specified value.
1) Check that the playback level satisfies the specified value.
Fig. 8-2-10.
H
A
H
Fig. 8-2-11.
H
A
Fig. 8-2-12.
White (100%)
White (100%)
A
Click on the first or last page to see other SLV-AV100B / SLV-AV100NP / SLV-AV100UX / SLV-AV100VC service manuals if exist.