Page 1
repair guide for the philips plasma power supply 3104-328-42741 or 3104-328-42742.
used in a lot of 42in philips plasmaʼs.
fault symptoms, relays click, red and green standby lights come on then goʼs off with
green light flashing once long two short.
checks, first check to see what supplyʼs come up, Vs, Va, Vcc, Vs_unsw (70-90v), Bias
supply.
Circuit Diagrams and PWB Layouts
35LC4.9E AA 7.
PDP FHP Supply: LLC Supply
IN OUT
ADJ
18V6
PDP AUDIO
35V(4V)
I030 E5
I031 E4
I093 F12
I094 F12
I095 H6
I096 H7
I043 B7
I044 B8
I283 F14
I284 E15
I285 A4
I286 A4
I053 E7
I054 E7
I055 E8
I289 A5
I290 G11
F298 H12
I065 C9
I066 C8
I067 C8
I070 B11
I295 D6
I296 F6
I297 E7
I298 C7
I299 B11
I061 A10
I011 D1
I012 D4
I080 G10
I081 F7
I082 F7
I083 F8
I062 B10
I063 B10
I064 B8
I073 F10
I074 F11
I021 E1
I022 F2
I023 F3
I089 E12
I090 E13
I075 C13
I077 F11
I078 C13
I079 C13
I088 E13
7021 D8
I032 E5
I033 F4
I034 F5
I035 F5
I098 H8
I282 D1
I038 C8
I039 D6
I041 B8
I042 B7
F005 C9
F006 D8
I045 C6
I046 C7
I047 D7
I048 D7
I287 A4
I288 B5
I051 E7
COLD GROUND
I052 D7
1V9(0V7)
VRS
I056 A2
I057 D7
I291 H11
I292 H10
I293 H11
I294 D13
F297 H12
I001 A2
I002 A3
I003 A5
I004 A5
I071 F10
I072 D11
I007 C2
I008 C2
I009 C2
I010 D2
7002 B9
7003 A9
I013 D2
I014 E1
I015 D2
I016 E2
I084 F8
I085 E12
I019 E1
I020 E3
VSND_POS
I024 F3
I025 F2
I091 E14
I092 F13
I028 G3
I029 G3
7020 C8
7042 C13
7090 A2
7091 A3
7092 A3
I036 F5
I037 C8
F001 A6
F002 C7
F003 C5
F004 C5
6010 F4
6011 F4 F007 F3
F008 D5
F009 D6
F014 E12
I049 D8
I050 D8
F040 B14
Vs_unsw
6032 D2
6033 E1
6034 D2
F290 H12
F292 H12
I059 E8
I060 A10
F295 H12
F296 G13
STANDBY ( . . . )
6042 C13
6044 C11
6045 F11
I005 B2
I006 B4
6095 A5
6291 H11
6292 H11
7001 B3
3098 F15
3100 F14
7005 B8
7006 E8
7007 C7
7008 E7
I017 E2
I018 E2
7011 F13
6003 A3
6004 D6
6005 D5
15V9
I026 F1
I027 C2
7017 F3
7018 F3
3064 F3
PR02
7093 A4
9007 A3
6007 C7
6008 D7
6009 F4
3073 D7
3075 B8
6012 B11
6018 C8
6019 E7
6021 F11 F016 B13
F017 C11
6028 E7
6029 B11
6031 D2
3092 A3
3093 B2
3094 A3
6035 D2
F293 G12
F294 H12
COLD
3049 D3
NFR25
VR25
T2,5A/250V
6075 B8
6077 D8
16V2(4V7)
3096 A5
3097 B5
3292 H10
5001 C6
5002 C9
5004 E9
7009 E4
7010 E12
5292 H12
5293 G12
6002 A4
6006 D7
7012 D7
7013 A3
3061 D8
3039 C14 3065 E4
3066 F2
3067 F5
3069 E1
3071 F2
3072 B13
5V1(4V2)
3076 C8
3077 E8
3078 E8
3080 C12
6023 E13
6027 C7
3089 A4
3090 A2
3091 B2
NORMAL . .
MEASURED DC-VOLTAGES
3095 A5
(24V)
1%
1%
3048 D1
3023 E12
3050 F7
3052 E12
3054 D6
3056 E4
18V(22V5)
FEEDBACK
5290 G10
5291 H12
LOW SIDE
BIAS SUPPLY
3059 D8
3060 C8
3038 C13
3012 F3
3040 E13
3041 F13
3042 D1
3043 D1 3070 E5
2V5
CONTROL
F1A/250V
CONTROL
3081 A4
3082 B5
SOFTSTART
3046 E1
3047 E2
3022 C12
2090 B2
3024 E13
3025 F13
3027 F2
3028 F13
3057 D12
CURRENT
PROTECTION
DRIVE
1%
3002 C6
3003 C1
3004 C1
3030 F12
3031 F13
HIGH SIDE
3034 F13
3037 C13
3011 E5
2035 F1
3013 F4
3014 C7
3015 C7
3016 C7
3044 D1
34V(4V)
19V3
VS-CONTROLLER
LLC SUPPLY
2046 C8
2047 E1
2048 F6
3045 E2
3020 F5
3021 F5
2071 C7
C
2290 H10
2291 G11
2292 H11
2293 H11
3029 E13
VSND_NEG
2295 G11
2296 H11
3001 E6
2025 E13
2026 F3
2027 E2
3005 C2
3006 D2
3032 F14
3033 D8
3009 F1
3010 E4
2034 E1
2036 D2
2037 E2
2038 C13
2039 D7
3017 D7
1%
TO 1MO2
18V6
(22V1)
2043 D13
2044 D11
2045 F11
2049 C1
2052 B3
3018 D7
3019 E7
2062 A4
2070 E7
B
2011 E9
D
E
F
G
2294 H11
(0V)
T2,5A/250V
34
2017 C9
35V(4V)
2022 E11
2023 E14
2024 E12
14 15
2028 C11
2029 G11
3007 E2
3008 E2
2032 D2
2033 D1
2040 D7
DRIVE
U13 E9
2041 D8
2042 D9
GND_SND
HOT GROUND
1001 G7
1002 H14
1006 G8
2053 B5
2060 F6
A
2010 F51009 G8
1082 F11
1083 F11
1084 G10
2000 G9
H
12
2005 C1
2006 C2
2007 F1
2012 D9
2013 C9
2014 F6
2018 C1
2020 C11
11 12 13
(0V6)
2015 F5
2016 E6
5
2030 F12
2031 F15
2
6 7 8 9 10
86V(6V)
19382
19382
HOT
U14 E6
0204 H9
1000 G6
2008 F3
2009 E51008 G9
1
4
3
2070
1n0
TCET1102(G)
7002
BAS316
6005
I020
I018
4K7
3012
6R8
3021
F293
I059
50V
2024
3n3
3043
4K7
6034
BAS316
3005
27K
I074
F004
I079
2016
50V2u2
100n
2047
6044
STTH2003C
1
3
2
200V
2028
220p
47p
2037
F295
GND4
F292
F007
F290
I039
3059
56K
3070
10K
6010
BAS316
50V
2010
10n
10K
3013
9007
BCP56
7013
6003
BZX384-C33
50V
2006
1n0
GND4 GND4
3
3072
4K7
5290
BD15403
2
1
4
3004
15K
6029
BZX384-C6V8
BY328/20
6045
3028
7K5
1K0
3081
2u2 50V
GND4
2062
10K
3089
GND4
470R
3002
400V_HOT
I007
I075
I078
6006
BAS316
2039
2n2
27p
2040
2041
100p
2042
330p
3020
56K
10n
2008
50V
3064
10K
EMC HOLE
1008
BAS316
6027
GND3
SW25V_HOT
6012
BZX384-C5V6
I096
3033
180K
BAS316
6018
I295
I043
BZG03-C270
6077
I027
100p
2049
50V
100K
I015
3003
10R
3018
5M6
3046
6002
I285
BAS316
I065
I284
I282
6291
STPS745F
I057
2023
100n
1m0
2294
GND4
1
4
3
2
25V_HOT
7003
TCET1102(G)
16V
2027
15n
I296
2290
10n50V
STPS745F
6292
I294
1000V
2034
47p
50V 1u0
2043
I299
6028
BAS316
GND4
I008
I014
I006
1K0
3045
I001
I042
F014
I054
2071
VTUN
1n0
470p
2000
250V
4
5
6
7
16V
2030
100n
1002
1
2
3
I292
I293
I291
470p
2295
470p
2296
7017
BC857BW
3076
100K
I081
GND4
F298
22u
5292
22u
5293
I061
I062
GND4
F009
F008
BZX384-C47
6033
2022
1m0
2012
2000V
50V
2000V
2013
330p330p
I064
150K
3024
I034
I028
I010
15n
2017
1600V
I094
BAS316
6095
3006
10K
BAS316
6009
50V
2015
10n
3065
1K0
3049
12K
I283
3029
4K7
3022
680R
33K
3041
GND4
I004
I003
1K0
3100
3037
10K
I089
50V
I070
470p
2293
BZX384-C5V6
6032
3044
1K0
3042
470R
PMST5401
7042
1m0
2052
150K
3047
35V
F001
+30V
3017
33R
7008
BC327-25
200V
220p
100K
3078
3
K
1
R2
2029
TS2431
7011
A
10K
3031
3077
4K7
3048
1M0
I045
I005
F296
I067
F040
I002
F294
3056
330R
I056
3071
47K
BAS316
6011
3090
100R
7012
BC847BW
1K0
3008
100n
2007
16V
GND4
I051
470R
3069
10n
2031
3054
470R
1009
EMC HOLE
I035
3016
1K0
BAS316
6007
3023
47K
I095
3095
470R
2090
4u7 35V
2000V
2014
1n5
7093
LM317T
1
32
2053
22u 35V
100p
2005
50V
200V
2044
220p
22u
5291
F006
2020
3m3 100V
I049
220p
2045
200V
I052
I047 I050
1006
EMC HOLE
GND4
I077
3027
47K
3092
1K0
50V
2018
100p
I029
1M0
I098
3073
220n
2060
I063
2048
220n
F297
1083
1082
I060
I088
I091
6
7
9
3001
470R
10
2
3
4
5001
S13932-04
I289
7021
BC517
I288
I286 I287
I046
3066
10K
I048
50V
2026
2n2
3039
1M0
18K
3061
I037
1K0
3082
I038
I036
3080
680R
220R
3034
I298
6004
BAS316
3
I073
0204
HEATSINK
12
I044
F002
3R9
3050
BY328/20
6021
I024 I033
1
OSCCC
3
OSCR
2
PGND
13
SOST
11
VCC
15
VREF
5
25V
2036
22n
FI
10
GND
4
7
In
Ip
8
OA
14
OB
12
OS
16
OSCC
7001
MC34067P
EAO
6
EN|UA
9
3
6
9
10
11
12
14
16
12
14
16
BS42315-02
5004
BS42315-02
5002
3
6
9
10
11
I071
I009
I021
+5V_INT_SW
EMC HOLE
1000
I016
50V
2035
1n0
33p
2046
220K
3060
16V
2033
100n
6031
BZX384-C5V6
2025
1u0
3040
100K
50V
F005
I072
15n
2011
1600V
6042
BZX384-C47
33R
3014
3015
10R
F003
7091
BC857BW
7009
BC847BW
BC847BW
7018
I019
70-90V
I017
6075
BZG03-C270
1K0
3019
I084I082 I083
BC807-25W
7092
3025
1K8
BAS316
6023
I053
10K
3032
7010
TS2431
A
3
K
1
R2
3007
4K7
1K0
3009
U14 U13
470p 50V
2291
VS
3038
100K
I012
1001
EMC HOLE
I025
3011
560R
50V
7090
BC857BW
GND4
1n0
2038
I290
560R
3292
1084
19370
2009
2u2 50V
BAS316
6019
I055
F016
F017
I092
VB
3091
1K0
I090
I093
I085
25V
2032
22n
2292
1m0
7006
STP15NK50ZFP
I011
3057
100R
I013
3030
18K
BAS316
6035
7020
3093
1K0
BC517
3075
1M0
3096
5K6
3097
820R
I031
I023
I030
3067
15K
6008
BAS316
I066
1K0
3094
150K
3052
I080
I026
I032
3010
15K
I297
7005
STP15NK50ZFP
1K0
3098
I022
I041
7007
BC327-25
LATCH
VRS
DC_PROT
3104 313 6128.1
A6
A6
E_16040_034.eps
271005
36LC4.9E AA 7.
Circuit Diagrams and PWB Layouts
PDP FHP Supply: AUX Supply
COM
OUTIN
CTRL
DEM
ISENSE
GND
DRAIN
HVS
DRIVER
VCC
+T
SYNC
COMP
OUTVCC
V5.1
VFB
OSC
BOOT
GND
INH
SS
CTRL
DEM
ISENSE
GND
DRAIN
HVS
DRIVER
VCC
1%
VA
6114 B9
2235 I12
2236 H12
2237 H13
2260 A6
3084 I1
3085 I1
3086 I1
3087 I1
6050 G3
6054 E1
6055 E1
6061 I3
6202 I4
6204 F4
6205 I5
6206 F5
6062 H6
6086 I1
6111 D1
6112 E1
3224 G11
6133 B5
MP200
Vs_unsw
MEASURED DC-VOLTAGES
RES
CN42
TO
RES
7134 D10
7140-1 D5
7140-2 D6
7142 D6
6117 C3
6120 D4
6123 D8
2234 I11
2138 D6
2203 I4
B
2261 A6
2262 A6
2263 B6
2112 D1
2113 E1
2121 E11
VCC
RES
CONTROL
3106 C1
1%
2122 D8
2123 D7
2054 C1
2055 E2
2056 C1
2057 E3
3088 I1
3101 D9
6142 G4
6201 B8
0V
NC
I112 D3
6211 I6
6213 H7
5121 C5
(DISPLAY)
VCC
NC
7202 H5
7130 E8
2218 G9
2219 I7
2222 G10
7200 G6
2050 G3
2051 H6
NC
SFR16
NC
C
D
E
F
G
1%
T5A/250V
I108 D4
I109 C2
I110 D3
I111 C5
1200 G4
1260 A5
VCC
0323 E13
3V3
(0V3)
2231 I12
2232 I10
2233 H13
3112 D1
3113 D2
3114 D2
2223 F10
2058 G2
2059 I1
2061 I2
2111 D1
2229 H10
VS
1%
I113 D1
1M10 C13
1M46 B13
2126 E8
2133 E9
2205 I5
2210 I6
1%
2021 I4
2212 G6
2213 I4
2214 I4
2215 I6
2217 H8
3141 E6
3142 E6
3143 E5
2264 B8
2211 I6
A
2269 A10
2270 B7
2273 D12
1%
PDP
I125 D9
VCC
TO
NC
RES
VA
2230 I10
0342 G12
0352 G13
3107 C1
3108 C2
3109 C2
3110 C2
3111 C5
3203 I4
3204 I5
3205 I5
3115 D3
2225 H10
2226 G11
2227 G11
2228 H12
RES
RES
VCC-SUPPLY
87V
3126 E7
3128 E8
3130 D8
3131 D9
3132 E7
3133 C8
3134 D10
3135 E10
3136 E10
3138 D5
3139 D6
3140 E6
3218 I9
3219 I7
3220 I9
3145 C6
2265 A9
2266 B8
2267 B9
2268 B9
2274 D10
3058 G2
3062 H2
3063 D10
3079 D9
3083 H2
3149 G8
3150 D7
3151 B10
3152 B11
3153 B11
3154 C11
3155 C11
3156 B11
3157 D11
3158 D11
3200 G5
3202 H5
3265 B8
3268 B10
3269 A10
3206 F6
3116 D3
3121 D7
3122 D8
3123 D8
3124 D8
3125 E8
3207 F6
3208 F7
3209 F7
3210 H11
3212 G6
3213 I7
3214 H7
3215 I7
3216 H7
3217 H8
7260 A8
9000 A12
9001 A12
6113 D2
1%
1%
87V
3051 G2
3053 H3
3055 B1
T2A/250V
3146 C6
3147 D9
3148 E7
2W 1%
3225 H11
3226 G11
3228 F12
3229 F10
3260 A6
3261 A6
3262 A6
3263 A6
3264 A9
SSB
TO
7061 C11
PDP
3117 D3
3118 C4
3120 D7
NC
CN23
(8V4)
0V1(8V)
5220 G9
5225 G11
5229 H10
5260 A5
5268 A10
7212 G7
7217 G8
7220 F9
7227 H12
7230 I11
D
(DISPLAY)
VS
9002 C6
CN52
SEQUENCE
PDP
RES
(0V5)
600V
105V
F115 A12
F116 I12
RES
64V (0V5)
I126 D8
I127 D7
I128 D8
(0V)
F119 E12
F120 F12
F121 E13
NC
7110 C2
7112 C2
7117 C3
7120 B5
7121 D7
F131 D12
F132 E13
2V5
TO
PROTECTION
S
Adj.
CONTROL
1%
1%
I231 F11
I233 F10
I234 G11
F133 E12
F138 H12
F139 H12
F140 G12
VA
F107 G13
F110 A1
F111 D9
F113 G4
F114 I12
I106 C3
I107 C4
RES
1%
1%
TO
1%
10V4(0V7)
104V(0V)
I177 B11
I178 B11
I180 B11
12V6(ON)
F118 E12
I203 I1
I204 I2
I207 I1
F122 B12
F126 E11
F127 E11
F128 E11
F129 E12
F130 D12
I217 H7
5V2(0V)
I218 H7
I219 H8
I220 H4
I221 H7
I222 I4
I223 I7
I224 I7
I225 I1
I230 F11
7052 I3
7058 I1
7059 I2
7060-1 B11
F134 F12
F135 F12
F136 G12
F137 G13
I240 H9
I164 C1
I165 E3
F260 A5
9009 A11
F102 D12
F106 E13
I101 B2
I102 B3
I103 A7
I104 A6
I105 B1
I175 A10
I176 B10
DISCHARGE
+12V-SUPPLY
11V5(0V7)
FROM
AUX SUPPLY
STANDBY (. . . )
AMBI LIGHT
I179 B11
RES
I155 D6
I156 D6
I181 C11
I131 E7
I132 E9
I133 B9
I208 H5
F123 E13
F124 B12
F125 E10
I212 F6
I213 G5
I214 G7
I215 G6
I216 G8
6225 G10
6230 I10
6260 A5
6267 B9
6268 A9
6269 H8
6270 I8
6271 B10
7050 G3
13
I159 E1
I161 G2
I162 C2
I163 C1
I200 G3
I201 H3
I202 I3
I166 F6
F264 A12
F265 A5
F380 B13
I170 H10
I171 H11
I172 A6
I173 A6
I174 D9
I147 C2
I148 H9
I152 C9
I153 D6
I154 D6
35V(4V)
G
I158 C1
RES
2
NC
I157 E6
I247 B9
I248 C4
I249 C5
2114 E2
2117 D3
2118 C4
1110 B1
I209 H9
I210 G5
I211 F5
2V5(0V3)
RES
3 4 5 6 7 8 9 10 11 12
I124 D7
NORMAL . . .
1%
1%
I160 E2
I237 H11
I238 G10
I129 E10
I130 A9
I137 B13
I167 F7
I168 F7
I169 H8
I245 I8
I246 B6
H
I
I134 B10
I135 C6
I136 B10
1M10
I235 G11
I236 G9
19382
39812
VA
1
I138 A9
I139 A7
I140 B8
I141 A8
6216 H8
I142 A6
(0V5)
1J01
I114 E2
I115 D2
I116 D2
I117 D3
7060-2 B11
(0V5)
(DISPLAY)
RES
I118 D4
I120 D8
I121 D7
I122 D10
I123 D9
I221
19382
NFR25
I243 I11
I244 I3
0R51
3145
BZX384-C18
6061
BYW29EX-200
6120
3062
1K0
+12V
10K
3147
+12V
1K0
3142
50V
2227
100p
3220
33R
I114
470p
2211
I200
2u2
2205
50V
2133
22u 50V
63V
2122
1u0
6206
BAS316
6202
BAS316
F133
3123
18K
I238
F130
I230
3264
560R
2261
50V
1m0
I237
I219
+30V
VA
70-90V
16V
2126
100n
2K7
3106
1K0
3110
F107
F265
I112
I113
3107
2K7
2236
10u
16V
100V
2200u
2121
2210
47u 16V
6050
BZX384-C18
F106
F113
+30V
I211
6204
BZX384-C5V6
33K
3213
3122
75K
F102
I123
3261
1K0
F125
F119
680R
3079
1u0
2058
250V
3116
1K0
3
50V
2222
100p
9001
6225
STPS20L40CFP
I233
F115
4R7
3149
2262
220n
22n
2050
50V
4
3
2
BSN20
7202
TCET1102(G)
7120
1
3120
1K8
PMST5401
7142
F110
0R051
3118
3210
1K0
3150
1M0
5
3
4
16V
2203
100n
7140-2
BC857BS
2
13
2021
3m3 100V
7230
L4940P
11
12
13
14
4
5
78
+30V
5220
BS29238-00
1
4K7
3143
10K
3131
3063
1K0
3224
12K
I156
100n
2059
16V
F116
3132
220R
3133
100R
F132
4n7
2267
BZX384-C18
BAS316
6213
2215
6062
470p
3130
12K
F122
I135
F126
I243
70-90V
I115
100u
5268
I207
I172
I140
I136
I235
BAS321
6054
3263
10K
F140
BZX384-C5V6
6201
2114
220n
F114
330p
2265
1u0
2235
BAS316
6112
3212
1K0
A
3
K
1
R
2
TS2431
7227
3228
150R
2226
100n 16V
I165
I246
I164
I162I163
I244
1K0
3203
1600V
2218
3n3
3125
7K5
I224
F264
I209
I132
25V
47u
2270
F380
3226
10K
2051
100n
I231
I216
I249
I248
F118
6055
BAS321
1M0
3058
I134
1K0
3216
50V
2112
1n0
F129
9000
I103
+12V_OVP
I102
R
2
I124
TS2431
7130
A
3
K
1
F134
I155
I204
I152
I203
I167
+5V_INT_SW
2273
100n
I218
2K7
3108
6111
BAS316
I247
2263
2n7
680R
3134
4
3
TCET1102(G)
7220
I148
I128
VS
3200
220K
+9V_STBY_SW
3204
100K
F121
I169
I213
BC847BW
7058
33K
3128
4u7
2266
2268
220n
2274
10n
I175
I174
I166
I173
I217
6268
SS14
I212
BAS316
6133
3055
10K
1110
I122
2214
4n7
I220
I126
47K
3121
PSMN035
7117
I161
I153
F123
2234
1u0
1
16V
47u
2231
BC857BS
7140-1
2
6
232266293
3053
10R
100K
3205
BSH114
7200
3117
10K
Φ
SMPS CONTROL
3
4
8
6
2
7
5
1
TEA1507P
7212
2219
10p
3219
I223
I120
10K
3086
47K
6.3V10u
2233
I202
16V10u
2237
1n5
2055
50V
75K
3140
+8V6
0R051
3218
6230
SS34
F136
SS14
6211
100p
2232
50V
I101
I111
I127
3209
2K7
3214
120K
F139
5229
220u
I108
34
I171
5121
BD21232
21
I138
470n
2264
I240
F131
47K
3136
3135
47K
I168
I107
I125
SB540
6267
47K
3088
47K
3087
3083
1K0
10K
BAS316
6123
PSMN070
7217
3111
2113
220u
25V
+5V_STBY_SW
PMST5401
7110
3229
560R
I158
2056
220p
3207
2K7
7050
PSMN035
560K
3114
I210
+5V_INT_SW
I201
I236
+8V6
3109
2K7
I137
F124
1K0
3112
I118
I106
16V
2061
100n
1
2
3
4
1M10
B4B-PH-K
8K2
3051
3265
1K0
10K
3217
330n
2217
16V
I129
3260
1K0
A
3
K
1
R
2
I109
7121
TS2431
I215
I110
I142
3126
2K2
VCC
7052
IRFR18N15D
6113
BAS316
I208
9009
I104
1K0
3268
I116
3141
1200
75K
F137
2057
1n5
I159
F111
220K
3115
3084
10K
2m2
2225
3148
5K6
VCC
I170
25V
50V
2123
3n3
2K7
3208
2
3
17
18
16
7
8
12
9
11
456
131415
10
1
REGULATOR
Φ
L4973V3.3
7260
I222
470u
2229
I139
I117
16V
I141
5260
100u
I133
220p
2054
50V
2269
2m2
VA
2213
4n7
6114
BZX384-C6V8
6
7
F120
0342
B7B-PH-K
1
2
3
4
5
I147
I130
1u0
2260
VTUN
2228
10u
I214
6.3V
7059
PMST5550
3
4
8
6
2
7
5
1
TEA1507P
7112
Φ
SMPS CONTROL
7K5
3124
I131
I105
I121
3269
2K7
BAS316
6086
I160
3139
220R
3138
220R
I245
6270
BYG10
4u7
5225
3085
47K
4
5
6
7
8
9
7134
BC847BW
1
10
11
2
3
10K
3262
1M46
B11B-PH-K
I234
F128
6142
S3J
3113
470K
2
3
4
5
6
7
8
9
B10P-VH
0323
1
10
220p
2111
50V
2138
1u0 10V
16V
470u
2230
3206
2K7
3101
1K0
BT151X-500R
6260
220n
2212
16V
16V
2117
330n
1000V1n0
2118
3146
0R51
F138
BYG10
6269
I154
100p
2223
50V
3215
270K
I157
VB
6117
BZX384-C18
F127
6205
BZX384-C18
3202
47R
1260
9002
F135
F260
10K
3225
6216
BZX384-C18
+9V_STBY
I225
1
2
3
4
5
6
7
B7B-PH-K
0352
VRA
VSA_CONTROL
POK
IAKS
VCC_GO
3104 313 6128.1
A7 A7
E_16040_035.eps
271005
www.andyselectronicstuff.co.uk
andrew richards
Digitally signed by andrew richards
DN: cn=andrew richards, o=andys electronic stuff, ou,
[email protected], c=GB
Date: 2010.05.22 00:07:22 +01'00'
Page 2
faults and cures,
if the Vs_unsw (70-90v) is missing should be about 62v, check Vcc supply to ic 7001 if
low suspect ic 7001 or the 7093 17v regulator. this ic can go short internally between vcc
pin 15 and gnd pin4, should read over 1k if good, if faulty reads about 50ohms, i found
replacing ic restored the Vs_unsw supply.
if the Va supply is missing then Vs will also missing as it uses the Va supply, first check
if you have drive out on pin 6 of ic 7112 (TEA1507P), if missing suspect 7112, 7117, 3118,
i found R3118 to be high about 250ohms re-soldering it along with 7117, and 7112
restored Va and Vs supplyʼs, but best to replace all three for long term reliability.
its also a good idea to check all the smd capacitors in this power supply for poor esr
these oneʼs in particular...
c2231, c2210, = 47uF/16v
c2508, c2540, c2465, c2541, c2387 = 100uF/16v
c2016, c2009, c2062 = 2.2uF/50v
tip, the easy way to remove the smd caps without damaging the print is with a hot air
reflow station (set to 370c).
location of parts to check,
www.andyselectronicstuff.co.uk
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