JVC AV-36F702/Y, AV-36F802/Y Service Manual
®
PRELIMINARY
SERVICE MANUAL
COLOUR TELEVISION
AV-36F802
AV-36F702
BASIC CHASSIS
RM-C303G
[AV-36F702]
AV-36F802
AV-36F702
RM-C301G
[AV-36F802]
/Y
/Y
AC
CONTENTS
! SAFETY PRECAUTIONS
! SERVICE ADJUSTMENTS
★ OPERATING INSTRUCTIONS (APPENDED)
★ STANDARD CIRCUIT DIAGRAM (APPENDED)
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
No. 51907
Oct. 2001
GOOD
EARTH
GROUND
0.15 µF AC-TYPE
AC VOLTMETER
(HAVING 1000Ø/V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500Ø 10W
A V
This mark shows a fast
POWER CORD
REPLACEMENT WARNING
Connecting thr white line side of
power cord to “WHT” character side.
operating fuse, the
letters indicated below
show the rating.
PWB
WHT
PW
White line side
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many circuits
and components specially for safety purposes. For continued protection, no changes should be made to the original design unless
authorized in writing by the manufacturer. Replacement parts must
be identical to those used in the original circuits. Service should be
performed by qualified personnel only.
2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special
safety-related characteristics. These characteristics are often not
evident from visual inspection nor can the protection afforded by
them necessarily be obtained by using replacement components
rated for higher voltage, wattage, etc. Replacement parts which have
these special safety characteristics are identified in the parts list of
Service manual. Electrical components having such features are
identified by shading on the schematics and by ( ) on the
parts list in Service manual. The use of a substitute replacement
which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual
may cause shock, fire, or other hazards.
4. Use isolation transformer when hot chassis.
The chassis and any sub-chassis contained in some products are
connected to one side of the AC power line. An isolation transf ormer
of adequate capacity should be inserted between the product and
the AC power supply point while perfor ming any service on some
products when the HOT chassis is exposed.
5. Don't short between the LIVE side ground and ISOLA TED (NEU-
TRAL) side ground or EARTH side ground when repairing.
Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the
ISOLATED(NEUTRAL) : ( ) side GND and EARTH : (
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and never
measure with a measuring apparatus (oscilloscope etc.) the LIVE
side GND and ISOLATED(NEUTRAL) side GND or EARTH side
GND at the same time.
If above note will not be kept, a fuse or any parts will be broken.
6. If any repair has been made to the chassis, it is recommended that
the B1 setting should be checked or adjusted (See ADJUSTMENT
OF B1 POWER SUPPLY).
7. The high voltage applied to the picture tube must conform with that
specified in Service manual. Excessive high voltage can cause an
increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions
should be kept to a minimum, or should be prevented. If severe
arcing occurs, remove the AC power immediately and determine
the cause by visual inspection (incorrect installation, cracked or
melted high voltage harness, poor soldering, etc.). To maintain the
proper minimum level of soft X-Ray emission, components in the
high voltage circuitry including the picture tube must be the exact
replacements or alternatives approved by the manufacturer of the
complete product.
8. Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the picture
tube before attempting meter connection, by connecting a clip lead
to the ground frame and connecting the other end of the lead through
a 10kØ 2W resistor to the anode button.
9. When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the high
voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced.
Always use the manufacturer's replacement components.
) side
No. 51907 2
AV-36F702
AV-36F802
10.Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an isolation check
on the exposed metal parts of the cabinet (antenna terminals, video/
audio input and output terminals, Control knobs, metal cabinet,
screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.
(1)Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any exposed metal part having a
return path to the chassis should withstand a voltage of 1100V AC
(r.m.s.) for a period of one second.
(. . . . Withstand a v oltage of 1100V AC (r .m.s .) to an appliance rated
up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or
more, for a period of one second.)
This method of test requires a test equipment not generally found in
the service trade.
(2)Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Using a “Leakage Current
Tester”, measure the leakage current from each exposed metal part
of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground (water pipe, etc.).
Any leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).
Alternate Check Method
•
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner.
Connect a 1500Ø 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the A C voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and repeat each
measurement. Any voltage measured must not exceed 0.75V AC
(r.m.s.). This corresponds to 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC (r.m.s.).
This corresponds to 0.2mA AC (r.m.s .).
11. High voltage hold down circuit check.
After repair of the high voltage hold down circuit, this circuit shall be
checked to operate correctly.
See item “How to check the high volta ge hold down circuit”.
AV-36F702
AV-36F802
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. Y ou can make the necessary adjustments f or this unit with either the remote control unit or with the adjustment equipment and parts
as given below.
2. Adjustment with the remote control unit is made on the basis of the initial setting values, however , the new setting values which set the
screen to its optimum condition may differ from the initial settings.
3. Make sure that AC power is turned on correctly.
4. Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts, which are not specified in the list for this adjustment-variable resistors, transformers, capacitors, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
User mode setting position
•
VIDEO STATUS STA NDARD
HYPER SURROUND OFF
BASS, TREBLE, BALANCE CENTER
TINT, COLOR, PICTURE,
BRIGHT, DETAIL
CENTER
MEASURING INSTRUMENT
1. DC voltmeter(or digital voltmeter)
2. Oscilloscope
3. Signal generator ( Pattern generator ) [NTSC]
4. Remote control unit
5. TV audio multiplex signal generator
6. Frequency counter
7. Resistor (1MØ)
ADJUSTMENT ITEMS
Check of B1 POWER SUPPLY
•
RF AGC adjustment
•
FOCUS adjustment
•
WHITE BALANCE adjustment
•
WHITE BALANCE (Low Light) adjustment
WHITE BALANCE (High Light) adjustment
PIP HIGH LIGHT WHITE BALANCE Adjustment [Only for A V36F802]
BRIGHT adjustment
•
SUB BRIGHT adjustment
CONTRAST adjustment
•
SUB CONTRAST adjustment
DEFLECTION adjustment
•
V CENTER and TRAPEZIUM adjustment
V SIZE and V LINEARITY adjustment
H SIZE and H POSITION adjustment
SIDE PIN and CORNER PIN adjustment
PIP DISPLAY POSITION adjustment [Only for AV-36F802]
CHROMA adjustment
•
SUB COLOR adjustment
SUB TINT adjustment
MTS circuit adjustment
•
INPUT LEVEL check
STEREO VCO adjustment
SAP VCO adjustment
FILTER check
SEPARATION adjustment
PURITY and CONVERGENCE adjustments
•
PURITY adjustment
STATIC CONVERGENCE adjustment
DYNAIC CONVERGENCE adjustment
No. 51907 3
AV-36F702
AV-36F802
ADJUSTMENT LOCATIONS
FRONT
LINE FILTER
PWB
P
E3
F901
125V 5A
E1
PW
MAIN PWB
CN006
SS
CN002 CN001
POWER SW PWB FRONT CONTROL PWB
D101
S701
CN007
IC701 CPU
3D Y/C MODULE PWB
CN004
CN003
J601
J602
R027
IC101
IC702
B CN007
MPX
S706
E1
C
S705 S703
S702S704
P
K
CN008CN009
CN005
S1
FRONT
S702 : MENU
S703 : CHANNEL–
CN006B
S704 : CHANNEL+
S705 : VOLUME–
S706 : VOLUME+
FRONT
DEG
DAF PWB
Q
K
Q511
Heatsink
HV
CP
Q
R507
DAF
FRONT
DAFCP
AV SELECTOR PWB
J502
J501
(Only for AV-36F802)
FRONT
TOP
CN001
CN002
J504 J503
TU001
TU001
PIP PWB
TU001
(Only for AV-36F802)
FRONT
TOP
CN003
UPPER : H
MIDDLE : FOCUS
LOWER : SCREEN
CRT SOCKET PWB
TP-G
CN004
(SOLDER SIDE)
TP-E1
CN005
TOP
E2
4 No. 51907
BASIC OPERATION OF SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
2. SERVICE MENU ITEMS
In general, basic setting (adjustments) items or verifications are performed in the SERVICE MENU.
PICTURE ............................... This sets the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION circuits.
•
SOUND.................................. This sets the setting values (adjustment values) of the AUDIO circuit.
•
THEATER .............................. This is used when the THEATER MODE is adjusted.
•
OTHERS................................ This is used when the OTHERS MODE is adjustment.
•
PIP ......................................... This sets the setting values (adjustment values) of the PIP circuit. [Only for AV-36F802]
•
LOW LIGHT ........................... This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
•
HIGH LIGHT .......................... This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
•
RF AFC .................................. This is used when the RF AFC MODE is verfifed.
•
RF AFC1 ................................ This is used when the RF AFC1 MODE is verified. [Do not adjust/Only for AV-36F802]
•
RF AFC2 ................................ This is used when the RF AFC2 MODE is verified. [Do not adjust/Only for AV-36F802]
•
VCO (CW).............................. This is not used for service.
•
I2C BUS CTRL ...................... This is used when ON/OFF of the I2C BUS CTRL is set. [Fixed ON]
•
3. Basic Operations of the SERVICE MENU
(1) How to enter the SERVICE MENU.
Press SLEEP TIMER key and, while the indication of “SLEEP TIMER 0 MIN.” is being displayed, press DISPLAY key and VIDEO STATUS
key on the remote control unit simultaneously to enter the SERVICE MENU screen 1 shown in the next figure page.
[Do not adjust/Only for
AV-36F702
]
AV-36F702
AV-36F802
(2) SERVICE MENU screen selection
Press the UP / DOWN key of the MENU to select any of the following items.
(The letters of the selected items are displayed in yellow.)
[AV-36F702]
PICTURE
•
THEATER
•
LOW LIGHT
•
RF AFC
•
VCO(CW)
•
(3) Enter the any setting ( adjustment ) mode
[AV-36F702]
PICTURE, SOUND and OTHERS mode
•
1) If select an y of PICTURE, SOUND or OTHERS items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN MENU ), the
screen 2 will be displayed as shown in figure page later.
2) Then the UP / DOWN key is pressed, the PICTURE mode screen 3 or the SOUND mode screen 4 or the OTHER mode screen 5 is
displayed, and the PICTURE, SOUND or OTHERS setting can be performed.
[AV-36F802]
PICTURE, SOUND, OTHERS and 3-D Y/C mode
•
1) If select any of PICTURE, SOUND, OTHERS or 3-D Y/C items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN
MENU ), the screen 2 will be displayed as shown in figure page later.
2) Then the UP / DOWN key is pressed, the PICTURE mode screen 3 or the SOUND mode screen 4 or the OTHER mode screen 5 or
the 3-D Y/C mode screen 6 is displayed, and the PICTURE, SOUND, OTHERS or 3-D Y/C setting can be performed.
PIP mode [Only for AV-36F802]
•
1) If select the PIP item, and the LEFT/RIGHT key is pressed from SERVICE MENU (MAIN MENU), the screen 6 will be displayed as shown
in figure page later.
2) Then the UP/DOWN key is pressed, the PIP mode screen 7 is displayed, and the PIP setting can be performed.
[AV-36F702]
THEATER, LOW LIGHT, HIGH LIGHT, RF AFC, VCO(CW) and I2C BUS CTRL mode
•
1) If select any of THEATER / LOW LIGHT / HIGH LIGHT / RF AFC / VCO (CW) / I2C BUS CTRL items, and the LEFT / RIGHT key is pressed
from SERVICE MENU ( MAIN MENU ), the screens 9 10 11 12 15 16 will be displayed as shown in figure page later.
2) Then the settings or verifications can be performed.
[AV-36F802]
THEATER, LOW LIGHT, HIGH LIGHT, RF AFC1, RF AFC2, VCO(CW) and I2C BUS CTRL mode
•
1) If select any of THEA TER / LOW LIGHT / HIGH LIGHT / RF AFC1 / RF AFC2 / VCO (CW) / I2C BUS CTRL items, and the LEFT / RIGHT
key is pressed from SERVICE MENU ( MAIN MENU ), the screens 9 10 11 13 14 15 16 will be displayed as shown in figure page
later.
2) Then the settings or verifications can be performed.
SOUND
•
OTHERS
•
HIGH LIGHT
•
I2C BUS CTRL
•
No. 51907 5
[AV-36F802]
PICTURE
•
THEATER
•
PIP
•
LOW LIGHT
•
RF AFC1
•
VCO(CW) •I2C BUS CTRL
•
SOUND
•
OTHERS
•
3-D Y/C
•
HIGH LIGHT
•
RF AFC2
•
AV-36F702
AV-36F802
1
SERVICE MENU (MAIN MENU)
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
LOW LIGHT HIGH LIGHT
RF AFC
VCO(CW) I2C BUS CTRL
SELECT BY
OPERATE BY
[AV-36F702]
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
PIP 3D Y/C
LOW LIGHT HIGH LIGHT
RF AFC1 RF AFC2
VCO(CW) I2C BUS CTRL
SELECT BY
OPERATE BY
[AV-36F802]
13
RF AFC1 MODE
[DO NOT ADJUST]
(Only for AV-36F802)
EXIT BY
EXIT BY
2
SCREEN PICTURE MODE
EX
IT
EX
IT
SELECT BY
4
SOUND MODE OTHERS MODE
1. NOISE DET.
STATUS
7
SCREEN PIP MODE
EXIT BY
999
99999999
EX
IT
1. BRIGHT
STATUS
1. OSD POS.
8
3
5
(Only for AV-36F802)
999
99999999
999
6
3-D Y/C MODE
(Only for AV-36F802)
1. YC 001
STATUS
999
99999999
TOO HIGH GOOD TOO LOW
RF AFC1 ON
FINE
SELECT BY
OPERATE BY
14
RF AFC2 MODE
[DO NOT ADJUST]
TOO HIGH GOOD TOO LOW
RF AFC2 ON
FINE
SELECT BY
OPERATE BY
15
VCO (CW) MODE
[DO NOT USE]
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
EXIT BY
(Only for AV-36F802)
EXIT BY
999
999
EX
IT
EX
IT
SELECT BY
9
THEA TER MODE (1/2) THEA TER MODE (2/2)
TINT
999
999
999
999
999
999
999
999
B CUT.
R DRIVE
B DRIVE
DC REST.
BLK ST.
GMM PNT
COLOR
PICTURE
BRIGHT
DETAIL
R CUT.
G CUT.
SELECT BY
OPERATE BY
10
LOW LIGHT MODE
BRIGHT
999 999
EXIT BY
EXIT BY
999
999
999
999
999
999
PAGE 1/2
999
EX
IT
EX
IT
1. PIP BR
STATUS
CD MAT.
99
RY GAIN
99
GY PHASE
99
CORING
99
SELECT BY
OPERATE BY
11
HIGH LIGHT MODE
99999999
CMP CD M
CMP RY G
CMP GY P
CMP COR
EXIT BY
999
PAGE 2/2
99
99
99
99
EX
IT
16
I2C BUS CTRL MODE
[FIXED ON]
I2C BUS ON
SELECT BY
OPERATE BY
EXIT BY
EX
IT
12
RF AFC MODE (Only for AV-36F702
[DO NOT ADJUST]
TOO HIGH GOOD TOO LOW
RF AFC ON
FINE
SELECT BY
OPERATE BY
EXIT BY
999
)
EX
IT
6 No. 51907
HIGH LIGHT
999 999
(4) Setting method
1. BRIGHT
STATUS
999
99999999
SETTING ITEM
INITIAL
SETTING VALUE
(Adjust)
SETTING VALUE
PICTURE MODE
1) UP / DOWN key of the MENU
Select the SETTING ITEM.
2) LEFT / RIGHT key of the MENU
Setting (adjust) the SETTING VALUE of the SETTING ITEM.
When the key is released the SETTING V ALUE will be stored (memorized).
3) EXIT key
Returns to the previous screen.
(5) Releasing SERVICE MENU
1) After returning to the SERVICE MENU upon completion of the setting (adjustment) work, press the EXIT key again.
AV-36F702
AV-36F802
¤ The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE BAL-
ANCE page of ADJUSTMENT.
No. 51907 7
AV-36F702
AV-36F802
INITIAL SETTING VALUE OF SERVICE MENU
1. Adjustment of the SERVICE MENU is made on the basis of the initial setting values; however, the new setting values which set the
screen in its optimum condition may differ from the initial setting.
2. Do not change the initial setting values of the setting (Adjustment) items not listed in “ADJUSTMENT”.
PICTURE MODE
•
The four setting items in the video mode No.6 EXT BRI., No.7 EXT PIC., No.8 EXT COL. and No.9 EXT TINT are linked to the items in the TV
MODE No.1 BRIGHT, No.2 PICTURE, No.3 COLOR and No.4 TINT, respectively. When the setting items in the TV mode are adjusted, the
values in the setting items in the video mode are revised automatically to the same values in the TV mode.(The initial setting values given in ( )
are off-set values.)
When the four items (No.6, 7, 8 and 9) are adjusted in the video mode, the setting values in each item are revised independently.
No. Setting (Adjustment) item Variable range Initial setting value Remark
1 BRIGHT 000 — 127 063
2 PICTURE 000 — 127 070
3 COLOR 000 — 127 072
4 TINT 000 — 127 063
5 TV DETAIL 000 — 063 050 AV-36F702
TV DETAIL 000 — 063 045 AV-36F802
6 EXT BRIGHT ±025 ±000
7 EXT PICT. ±025 +002
8 EXT COLOR ±025 ±000
9 EXT TINT ±025 ±000
10 EXT DETAIL 000 — 063 050 AV-36F702
EXT DETAIL 000 — 063 045 AV-36F802
11 CMP BRIGHT ±025 ±000
12 CMP PICT. ±025 ±000
13 CMP COLOR 000 — 127 068
14 CMP TINT 000 — 127 068
15 CMP DETAIL 000 — 063 050
16 CMP R CUT ±025 –011
17 CMP G CUT ±025 ±000
18 CMP B CUT ±025 –001
19 CMP R DRV ±025 ±000
20 CMP B DRV ±025 ±000
21 WPL 000 / 001 001
22 B. B. SW 000 / 001 000
23 C TRAP 000 / 001 000
24 CORING 000 / 001 000 AV-36F702
CORING 000 / 001 001 AV-36F802
25 CMP CORING 000 / 001 001
26 TV SHARPF 000 / 001 001
27 EXT SHARPF 000 / 001 001
28 CMP SHARPF 000 / 001 001
29 RGB CONT 000 — 063 031
30 TV ID SENS 000 / 001 000
31 EXT ID SEN 000 / 001 001
32 F ID 000 / 001 000
33 Y MUTE 000 / 001 000
34 AUDIO ATT 000 — 127 127
35 SUB CONT 000 — 015 008
8 No. 51907
No. Setting (Adjustment) item Variable range Initial setting value Remark
36 R Y GAIN 000 / 001 001
37 CMP R Y GA 000 / 001 001
38 G Y PHASE 000 / 001 000
39 CMP G Y PH 000 / 001 000
40 CD MATRIX 000 — 003 003
41 CMP CD MAT 000 — 003 002
42 BLACK ST 000 — 003 001
43 DC REST 000 — 003 001
44 COLOR GMM 000 / 001 000
45 UV/CBCR 000 / 001 001
46 AT FLESH 000 / 001 000
47 ABL GAIN 000 — 003 000
48 ABL ST PNT 000 — 003 003
49 RGB ABCL 000 / 001 001
50 TV BPF TOF 000 / 001 000
51 EXT BPF TOF 000 / 001 000
52 GMM PNT 000 — 003 003
53 SVM GAIN 000 — 003 002
54 CMP SVM GA 000 — 003 002
55 SVM PHASE 000 / 001 000
56 AUDIO SW 000 / 001 000
57 BUZZ 000 / 001 000
58 IF FREQ 000 / 001 000
59 RF AGC 000 — 063 045
60 AFT MUTE 000 / 001 000
61 AFT SENS 000 / 001 001
62 R/G DRV SW 000 / 001 001
63 BLK SW 000 / 001 000
64 V S COR 000 — 015 010
65 V LIN 000 — 015 005
66 V SIZE 000 — 127 063
67 V AGC 000 / 001 000
68 V CENTER 000 — 063 052
69 TV AFC 000 — 003 000
70 EXT AFC 000 — 003 002
71 V POSI 000 — 007 000
72 H POSI 000 — 031 020
73 H SIZE 000 — 063 028
74 TV V FREQ 000 — 003 000
75 EXT V FREQ 000 — 003 003
76 SIDE PIN 000 — 063 025
77 STAND BY 000 / 001 000
78 TRAPEZ 000 — 063 035
79 V RAMP REF 000 / 001 001
80 V 48HZ 000 / 001 000
81 V EHT 000 — 007 000
82 TOP PIN 000 — 031 012
AV-36F702
AV-36F802
No. 51907 9
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