Sony KV-27V42 Service Manual ▷ View online
— 17 —
KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
4-1.
R584 CONFIRMATION METHOD
(HV HOLD-DOWN CONFIRMATION)
AND READJUSTMENTS
AND READJUSTMENTS
The following adjustments should always be performed when
replacing the following components which are marked with
replacing the following components which are marked with
on the schematic diagram.
DY, C511, C573, C574, C575, D572, D573, D574,
R582, R583, R585, R586, R578, R625, R626, T504, IC301,
IC521, IC602, C507, C508, C505, C509, C515, C520, L591,
L501
R582, R583, R585, R586, R578, R625, R626, T504, IC301,
IC521, IC602, C507, C508, C505, C509, C515, C520, L591,
L501
Preparation Before Confirmation
1. Using a Variac, apply AC input voltage: 120 ± 2 VAC
(or 120-220 ± 2 VAC for KV-29SL42K).
2. Turn the POWER switch ON.
3. Input an entirely white signal and set the PICTURE and
BRIGHTNESS controls to maximum.
4. Confirm that the voltage between C574 (+) or TP503
and ground is more than 105 VDC.
Hold-down Operation Confirmation
1. Connect the current meter between Pin 11 of the FBT
(T504) and the PCB land where Pin 11 would normally
attach. (See Figure 1 on the following page.)
attach. (See Figure 1 on the following page.)
2. Input a dot signal and set PICTURE and BRIGHTNESS
to minimum: IABL = 100 + 100/-95
mA.
3. Confirm the voltage of A Board TP-600 is
135 ± 3 VDC.
4. Connect the digital voltmeter and the DC power supply
via diode 1SS119 to C574 (+) and ground.
(See Figure 1 on the following page.)
(See Figure 1 on the following page.)
5. Increase the DC power voltage gradually until the picture
blanks out.
6. Read the digital voltmeter indication.
(standard: less than or equal to 141.3 VDC).
7. Turn DC power source off immediately
8. Input a white signal and set PICTURE and BRIGHTNESS
to maximum.
9. Repeat steps 4 to 7.
SECTION 4
SAFETY RELATED ADJUSTMENTS
Hold-down Readjustment
If the setting indicated in step 2 of Hold-down Operation
Confirmation cannot be met, readjustment should be performed
by altering the resistance value of R584, a component marked
with
Confirmation cannot be met, readjustment should be performed
by altering the resistance value of R584, a component marked
with
.
+
I ABL
ABL
FBT
Range
-
Ammeter
3.0 mA DC
A
4-2. B+ VOLTAGE CONFIRMATION AND
ADJUSTMENT
Note: The following adjustments should always be performed
when replacing the following components, which are marked
with on the schematic diagram.
when replacing the following components, which are marked
with on the schematic diagram.
IC601, IC602
1. Using a Variac, apply AC input voltage: 130 ± 2 VAC
(or 120-220 ± 2 VAC for KV-29SL42K).
2. Input a dot signal.
3. Set the PICTURE and BRIGHTNESS controls to minimum.
4. Set to Service Adjustment Mode.
5. Select PADJ with
and
.
6. Adjust with
to the 0 level.
7. Confirm the voltage of A board TP-600 is less than
138 VDC.
8. If step 7 is not satisifed, replace the components and repeat
the above steps.
9. Supply 120 ± 2 VAC (or 120-220 ± 2 VAC for KV-
29SL42K) to the set with a variable auto transformer.
10. Adjust with
and
for 135 ± 3 VDC.
11. Press
then
to save into the memory.
T504
— 18 —
KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
Figure 1
TP600
Ammeter
3mA DC Range
T504
FBT
ABL11
C574
+
–
–
A
Digital
Multimeter
+
–
–
R584
+
–
Power
Supply
1SS119
Digital
Multimeter
+
–
–
— 19 —
KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
5-1. Setting the Service Adjustment Mode
1. Standby mode (power off).
2.
Display
Channel 5
Sound volume
Power ON
+
on the Remote Commander (press each button within
a second).
a second).
Service Adjustment Mode On
1. The CRT displays the item being adjusted.
SERVICE HSIZ 0
Disp.
(Item)
Item
Data
2. Press
or
on the Remote Commander to select
an item.
3. Press
or
on the Remote Commander to change
the data.
4. Press
then
to save into the memory.
Service Adjustment Mode Memory
SERVICE WRITE
Green
Red
MUTING
ENTER
1. Press
then
on the Remote Commander to
initialize.
SERVICE RESET
2. Turn set off then on to exit service adjustment mode.
SECTION 5
CIRCUIT ADJUSTMENTS
Carry out step 1 when adjusting
IDs 0–4 and when replacing
and adjusting IC003.
IDs 0–4 and when replacing
and adjusting IC003.
Electrical Adjustment by Remote Commander
Use the Remote Commander (RM-Y165, RM-Y167 or RM-Y149A) to perform the circuit adjustments in this section.
NOTE: Test Equipment Required:
• Pattern generator
• Frequency counter
• Digital multimeter
• Audio oscillator
• Frequency counter
• Digital multimeter
• Audio oscillator
RM-Y165
5-2. Memory Write Confirmation Method
1. After adjustment, remove the power plug from the AC
outlet, then plug it in again.
2. Turn the power switch ON and set to service mode.
3. Call the adjusted items again to confirm they were adjusted.
5-3. Adjust Buttons and Indicators
— 20 —
KV-27V42/27V66/29SL42K/29SL42T/29VL42T/29XL42T
SERVICE ID0 25
Notes:
No. 1–122 show the order that each adjustment mode may be selected while in service mode.
Data Range shows the range of possible settings for each adjustment mode.
Initial Data shows the standard settings for each adjustment mode.
Adjustment Items
Service
Data
Item
Name
Name
Range
1
HSIZ
A_HSIZE
0-63
31
42
2
HPOS
A_HPOS
0-63
31
22
3
VBOW
A_AFCB
0-15
7
6
4
VANG
A_AFCB
0-15
7
6
5
TRAP
A_TRAP
0-15
7
7
6
PAMP
A_PAMP
0-63
31
16
7
CPIN
A_CPIN
0-63
31
34
8
VSIZ
A_VSIZ
0-63
31
33
9
VPOS
A_VPOS
0-63
31
38
10
VLIN
A_SCOR
0-15
7
6
11
SCOR
A_SCOR
0-15
7
7
12
VZOM
A_SCROLL
0-1
0
0
13
EHT
A_TRAP
0-15
7
4
14
ASP
A_ASPECT
0-63
63
48
15
SCRL
A_SCROLL
0-63
31
31
16
HBLK
A_ASPECT
0-1
0
1
17
LBLK
A_HBLK
0-15
7
15
18
RBLK
A_HBLK
0-15
7
3
19
VUSN
A_ASPECT
0-1
0
0
20
HDW
A_PON
0-1
0
0
21
EWDC
A_HSIZE
0-1
0
0
22
LVLN
A_VLIN
0-15
0
0
23
UVLN
A_VLIN
0-15
0
0
24
RDRV
A_RDRIVE
0-63
31
14
25
GDRV
A_GDRIVE
0-63
31
10
26
BDRV
A_BDRIVE
0-63
31
8
27
RCUT
A_RCUT
0-15
7
8
28
GCUT
A_GCUT
0-15
7
4
29
BCUT
A_GCUT
0-15
7
5
30
DCOL
A_GDRIVE
0-1
0
1
31
SHUE
A1_SUBHUE
0-31
14
9
32
SCOL
A1_SUBCOL
0-31
14
23
33
SBRT
A1_SUBBRT
0-31
14
10
34
RON
A_VIDSEL
0-1
0
1
35
GON
A_VIDSEL
0-1
0
1
36
BON
A_VIDSEL
0-1
0
1
37
AXPL
A_PON
0-1
0
0
38
AXNT
A_SHPF0
0-1
0
0
39
CBPF
A_XTAL
0-1
0
1
40
CTRP
A_XTAL
0-1
0
1
41
COFF
A_COFF
0-1
0
0
42
KOFF
A_COFF
0-1
0
0
43
SSHP
A1_SUBSHP
0-15
8
6
44
SHPF
A_SHPF0
0-1
0 / 0 *2
1
45
PREL
A_DCTRAN
0-1
0
1
46
Y-DC
A_DCTRAN
0-1
0
1
47
GAMM
A_BDRIVE
0-3
0
0
48
ABLM
A_RDRIVE
0-1
1
1
49
VTH
A_RDRIVE
0-1
0
1
50
YDEL
A_HOSC
0-15
7
7
51
NCOL
A_PIC
0-1
0
1
52
FSC
A_PIC
0-1
0
1
53
K-ID
A_KID
0-1
0
0
54
HOSC
A_HOSC
0-15
7
7
55
VSS
A_FFREQ
0-1
0
0
56
HSS
A_FFREQ
0-1
0
0
57
HMSK
A_VSIZ
0-1
0
1
58
VTMS
A_TVOFF
0-3
0
0
59
CDMD
A_FFREQ
0-3
0 / 1 *2
0
60
AFC
A_VPOS
0-3
0 / 0 *2
0
61
FIFR
A_FFREQ
0-3
0
3
Initial Value Average Data
*2: TV/VIDEO
Service
Data
Name
Name
Range
62
SBAS
0-15
7
8
63
STRE
0-15
7
9
64
SBAL
A1_SUBBAL
0-31
14
13
65
DISP
A_OSDPOS
0-127
0
11
66
PADJ
A_PADJ
0-63
3
51
67
HCHM
A6_HCHM
0-255
69
69
68
HCLM
A6_HCLM
0-255
16
16
69
HCHS
0-255
69
69
70
HCLS
0-255
16
16
71
PFRN
0-1
0
0
72
PRVS
0-1
0
0
73
PCON
0-127
32
70
74
PUCO
0-127
75
63
75
PVCO
0-127
40
63
76
PHUE
0-31
15
15
77
PKIL
0-1
0
0
78
PSEP
0-3
2
2
79
PDCO
0-3
0
0
80
PEXP
0-3
2
2
81
PBGS
0-63
14
14
82
PYDL
0-15
3
7
83
PBRT
0-31
0
25
84
PVPE
0-16
0
0
85
PUPE
0-16
0
0
86
PACS
0-1
0
1
87
PSDL
0-3
0
0
88
PMVP
0-3
0
0
89
PCGA
0-1
0
1
90
PBIT
0-1
0
0
91
PAFC
0-1
0
0
92
PACC
0-63
21
20
93
PBUR
0-1
0
0
94
PEVE
0-1
0
0
95
PINW
0-1
0
0
96
PINR
0-1
0
0
97
PREF
0-1
0
0
98
PARE
0-1
1
1
99
PAVE
0-1
0
0
100 PFRA
0-15
0
0
101 PPAL
0-255
0
0
102 PHPO
0-31
31
2
103 PVPO
0-31
21
22
104 PHTI
0-15
10
10
105 PHAJ
0-15
2
2
106 PBGY
0-15
0
0
107 PCRO
0-1
0
0
108 PPAR
0-63
2
2
109 PHPF
0-1
0
1
110 PVCH
0-1
0
0
111 PVON
0-1
0
1
112 PVLN
0-31
17
17
113 PVSB
0-255
64
64
114 PVLV
0-255
130
130
115 ID0
A_NVMID0
0-255
23
See ID map
116 ID1
A_NVMID1
0-255
3
See ID map
117 ID2
A_NVMID2
0-255
11
See ID map
118 ID3
A_NVMID3
0-255
1
See ID map
119 ID4
A_NVMID4
0-255
23
See ID map
120 ID5
A_NVMID5
0-255
0
See ID map
121 ID6
A6_NVMID6
0-255
0
See ID map
122 ID7
A6_NVMID7
0-255
64
See ID map
Initial Value Average Data
Item
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