Main
SERVICE MANUAL
CHASSIS
(VF21M77 ONLY)
COLOR VIDEO TV
TRINITRON
SPECIFICATIONS
Receivable channels and channel display
Page
1. OUTLINE
2. DIAGNOSTIC TEST INDICATORS
SELF DIAGNOSTIC FUNCTION
4. SELF-DIAGNOSTIC SCREEN DISPLAY
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
3. DISPLAY OF STANDBY LIGHT FLASH COUNT
6. SELF-DIAGNOSTIC CIRCUIT
[+Bovercurrent]
standard pulse which detect cathode current, or which become low almost.
become LOW and OFF RY601.
[+Bovervoltage]
Step 1: Preparation
Check the supplied accessories
Insert the batteries into the remote control
Step 2: Installing the video TV
Secure the video TV
Step 3: Connecting the antenna
7
Connecting an outdoor antenna
To connect a VHF antenna or a combination VHF/UHF antenna75-ohm coaxial cable (round)
To connect both VHF and UHF antennas
Step 5: Setting the clock
You need to set the clock to use timer recording, Quick-Timer recording and on-timer functions.
CLOCK SET , then press
Press ENTER. The day section turns red.
Press M or m to set the day, then press ,. The month section turns
Step 6: Setting the channels
Presetting channels automatically
Make sure TV SET UP is selected, then press
12
Step 6: Setting the channels (continued)
Presetting channels automatically using the TUNER PRESET ON/OFF button on the video TV
t
14
Basic Operations
15
Watching the TV
Selecting the picture mode
Displaying on-screen information
Basic Operations
16
Playing a tape
17
Press PLAY N. Playback starts. On-screen information is displayed for a few seconds.
Protecting your cassette against accidental erasure
18
Recording TV programs
Recording TV programs
20
To stop recording
21
To pause recording
Recording with the TV off
Recording using QUICK-TIMER
23
Before you begin
24
25
Changing or canceling the Quick Timer settings
Press QUICK TIMER. The QUICK TIMER display appears.
26
Recording TV programs using the timer
27
Setting the timer
If you have made a mistake during timer setting
Daily/weekly recording
Adjusting the TV
Adjusting the volume INTELLIGENT VOL
Additional Operations
Presetting channels manually
Skipping program positions
Adjusting the TV system
Adjusting the color system
Changing the PICTURE MODE setting
36
Adjusting the alignment of the picture
37
Tape options
Adjusting the tracking
Adjusting the tracking automatically
Adjusting the tracking manually
38
Adjusting with Adaptive Picture Control (APC)
39
To change the setting
Playing a tape repeatedly
Adjusting the picture for rental tapes
When connecting to a Sony VCR
42
Setting the color system
43
Switching off
SLEEP
To cancel the timer
44
Switching on
45
ON TIMER
To cancel the on-timer function
46
Searching using the index function
To connect a VCR
47
To stop searching
Connecting optional equipment
48
Connecting optional equipment (continued) To watch the video input signal
t 2/GAME IN 9
GAME
GAME
Self-diagnosis function
Check that the 1 indicator flashes red once or more in intervals of 3 seconds.
Count the number of times the indicator flashes.
Press ?/1 to turn off your video TV.
t
Identifying parts and controls
Refer to the pages indicated in parentheses ( ) for details.
Front panel
14 2 3 5 6
56
Identifying parts and controls (continued)
57
Remote control
1-2. KV-VF21M77
Step 1: Preparation
Check the supplied accessories
B
A
Insert the batteries into the remote control
Step 3: Connecting the antenna
7
Connecting an outdoor antenna
To connect a VHF antenna or a combination VHF/UHF antenna75-ohm coaxial cable (round)
To connect both VHF and UHF antennas
Step 5: Setting the clock
You need to set the clock to use timer recording, Quick-Timer recording and on-timer functions.
CLOCK SET , then press
Press ENTER. The day section turns red.
Press M or m to set the day, then press ,. The month section turns
Step 6: Setting the channels
Presetting channels automatically
Make sure TV SET UP is selected, then press
12
Step 6: Setting the channels (continued)
Presetting channels automatically using the TUNER PRESET ON/OFF button on the video TV
t
14
Basic Operations
15
Watching the TV
Selecting the picture mode
Displaying on-screen information
Basic Operations
16
Playing a tape
17
Press PLAY N. Playback starts. On-screen information is displayed for a few seconds.
Protecting your cassette against accidental erasure
18
Recording TV programs
Recording TV programs
20
To stop recording
21
To pause recording
Recording with the TV off
Recording using QUICK-TIMER
23
Before you begin
24
25
Changing or canceling the Quick Timer settings
Press QUICK TIMER. The QUICK TIMER display appears.
26
Recording TV programs using the G-CODE
27
Setting up the G-CODE system
28
Recording TV programs using the G-CODE system
29
If you make a mistake entering the G-CODE number
To use the video TV before timer recording starts
Recording TV programs using the timer
31
Setting the timer
If you have made a mistake during timer setting
Daily/weekly recording
Adjusting the TV
Adjusting the volume INTELLIGENT VOL
Additional Operations
Presetting channels manually
Skipping program positions
Adjusting the TV system
Adjusting the color system
Changing the PICTURE MODE setting
40
Adjusting the alignment of the picture
41
Tape options
Adjusting the tracking
Adjusting the tracking automatically
Adjusting the tracking manually
42
Adjusting with Adaptive Picture Control (APC)
43
To change the setting
Playing a tape repeatedly
Adjusting the picture for rental tapes
When connecting to a Sony VCR
46
Setting the color system
47
Selecting a bilingual program
48
Switching off
49
SLEEP
To cancel the timer
Switching on
Searching using the index function
To stop searching
52
Connecting optional equipment
53
To connect a VCR
Watching and recording the picture input from optional equipment
To connect a video camera
Self-diagnosis function
Troubleshooting
58
Symptoms caused by contaminated video heads
59
Normal picture Rough picture Unclear picture No picture (or black & white screen appears)
t
Identifying parts and controls
Front panel
14 2 3 5 6
62
Identifying parts and controls (continued)
Remote control
SECTION 2 DISASSEMBLY
2-1. REAR COVER REMOVAL 2-2. CHASSIS ASSY REMOVAL
Claw
2 Claw
3 A board
CV board
VM coil
F board
Tuner
FBT
Removal of anode-cap
removing procedures
2-6. PICTURE TUBE REMOVAL
how to handle an anode-cap
SECTION 3 SET-UP ADJUSTMENTS
3-1. BEAM LANDING
3-2. CONVERGENCE
3-3. FOCUS ADJUSTMENT
3-4. SCREEN (G2) ADJUSTMENT
3-6. PICTURE DISTORTION ADJUSTMENT
3-5. WHITE BALANCE ADJUSTMENT
CONFIRMATION OF HOLD-DOWN
1. CONFIRMATION OF +B LINE (A BOARD)
2. CONFIRMATION OF HOLD-DOWN (A BOARD)
SECTION 4 SAFETY RELATED ADJUSTMENT
3. CONFIRMATION AFTER EXCHANGED IC607 AND R638
4. CONFIRMATION AFTER EXCHANGED PM601, R614 AND C614
-
A BOARD COMPONENT SIDE
SECTION 5 CIRCUIT ADJUSTMENT
5-1. ADJUSTMENTS WITH COMMANDER
SERVICE MODE DISPLAY
No. DATA
RM-956
5-2. ADJUSTMENT METHOD
RM-955
REMOTE COMMANDER'S FUNCTION IN SERVICE MODE
5-3. SERVICE DATA
Page
5-4. A BOARD ADJUSTMENT
Page
79 80 81 82
SECTION 6 DIAGRAMS
@
1
TV BLOCK
1
A
A(1/2)
(RGB OUT, VM)
A
A BOARD
IC
TRANSISTOR
*
A
TUNER,Y/C/J,HV DEFLECTION, POWER SUPPLY
CN703
TO PICTURE TUBE
TO F BOARD CN902
VIDEO section
CV BOARD
F BOARD
24.0Vp-p (H) 1.4Vp-p (5msec)
F
95
96
SECTION 1 GENERAL
- Bottom Side -
1-1. INTERNAL VIEWS - Top Side -
97
SECTION 2 DISASSEMBLY
2-5. SERVICE POSITION (MA10 BOARD)
2-1. TOP COVER REMOVAL 2-2. VCR BLOCK ASSY REMOVAL
2 Top cover
1 Four screws (+BVTP 3 X 12)
SECTION 3 CIRCUIT ADJUSTMENTS
[ INSTRUMENTS TO BE USED ]
[ CONNECTION ]
[ SPECIFIED INPUT/OUTPUT LEVEL IMPEDANCE ]
[ SET-UP FOR ADJUSTMENT ]
99
Xtal OSC CHECK
SYNC AGC CHECK
CARRIER DEVIATION CHECK
WHITE/DARK CLIP CHECK
100
REC Y LEVEL CHECK
REC CHROMA CHECK
PB Y LEVEL CHECK
SWITCHING LOCATION ADJUSTMENT WHEN CHANGE DRUM
SECTION 4 INTERFACE, IC PIN FUNCTION DESCRIPTION
4-1. -COM PORT FUNCTION DESCRIPTION (MA10 BOARD IC001)
102
4-2. SYSTEM CONTROL-VIDEO BLOCK INTERFACE (MA10 BOARD IC402)
4-3. SYSTEM CONTROL-SERVO PERIPHERAL CIRCUIT INTERFACE (MA10 BOARD IC402)
103
4-4. SYSTEM CONTROL-MECHANISM BLOCK INTERFACE (MA10 BOARD IC402)
*1. 30Hz 50% duty pulse approximately 5 msec. delayed from RF SW P.
4-5. SYSTEM CONTROL-SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA10 BOARD IC402)
4-6. SYSTEM CONTROL-AUDIO BLOCK INTERFACE (MA10 BOARD IC402)
104
4-7. SERVO/SYSTEM CONTROL PORT FUNCTION DESCRIPTION (MA10 BOARD IC402)
105 106 107
SECTION 5 DIAGRAMS
CV
VIDEO BLOCK
5-1. BLOCK DIAGRAMS
FF10
SYSTEM CONTROL,MAIN MICON, VCR SERVO,AUDIO OUT,Y/C PROCESS, AUDIO PROCESS,VIDEOAFM REC/PB AMP
@,,@
MA10 (3/3)
f
E
Terminal name of semiconductors in silk screen printed circuit ( )
*
MA10
CLK CS
SECAM
VM SW
TV Y
MA10
1 2 3 4 5 6 7 8 9 101112131415161718192021
1 2 3 4 5 6
10
12 13 14 15
MA10
SP CH2 F
Q701
SW5V
123456789101112
FF10
(LED,EJECT SW)
A B C D
12345
123
Page
Page
Page
Page
Page
129
SECTION 7 ELECTRICAL PARTS LIST
F A
TV BLOCK
130
131
132
ACV
133
CV
134
VIDEO BLOCK FF10 MA10
135
136
137
138
139
140
KV-VF21M40/VF21M70/VF21M77
9-965-739-01
Quality Assurance Division
Sony Ichinomiya Corporation
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