Philips FR975 Service Manual page 59

10-6
1251 A1 1260 B3 2256 C6 2266 H3 2273 K4 2279 K5 3254 J3 3265 E5 3273 K6 3294
1252 A1 1261 C3 2257 J5 2267 J6 2274 J7 2281 H5 3256 M3 3266 F7 3274 K7 3295
1253 H1 1266 G9 2259 D7 2268 I4 2275 K4 2282 H7 3257 L3 3268 E5 3275 L7 4253
1254 L1 2251 B3 2260 B7 2269 I4 2276 M5 2287 K4 3258 M3 3269 E6 3291 G4 6251
1255 F1 2253 B4 2262 C7 2270 I5 2277 M7 2290 H5 3261 K5 3270 F7 3292 H7 6253
1257 K9 2254 C4 2264 C7 2271 I7 2278 M2 2295 H6 3262 K6 3271 F8 3293 H6 6255
1 2 3 4 5 6
MONOBOARD SUPPLY FR975
1251 1252
A
1 1
1260
2 2
6,3A
2251 2253
B
100n 47n
3 3 6251 6253
78V ~ 48V ~
D5SBA20 D5SBA20
A 2254 2256
1261 100n 47n
4 4
C 6,3A
5 5
To 1073/1074
Mains trafo
D
4253
–41V
7257 7258
3265 BC327-25 BC327-25
E 6276
9260
–41,6V
BZX79/
3268 3269
–52V C5V6
3k3 3k3 –32,5V
6280
–30V CIRCUIT
BZX79/C10
6281
1255
BZX79/C22
F
S
1
f1
4,6V ~
2
f2
+4V
amp 3
prot
G
7910
4
3291
BD242BFP
–31V
10E
S
To 1072 2281
3293 –14V
Mains trafo
100n
2290 3294 2295
10k
REF
1253 µ
H 10 10n
REF
–22V
1 7908
BC857B
6260
6258 6259
6257 2266 L7812GP
REF
1N4003GP 100n
2 4x +24 +24V 1 3
21V ~
1N4003GP
6261 2268 2270 2271
I
2
1N4003GP 6262 6263 100n 100n 470n
3
REF REF
REF
2269
+0,1V
6255
To 1071
4700µ
Mains trafo
3254 7251 1N4148
BD242BFP
J
S
2257
2267
10n 6264
+11V
47µ BZX79/
C5V6
+12V
3261 3262 +1V
2287 +9,5V
2273
K
µ 3273 3274
3300 100n 7252 +0,6V
6268 +0,1V BC847B
+0,6V
REF
1N4003GP
2275
2279
3257 7254
3275
1000µ
100n
BC847B
1254
S REF REF REF REF
3 +V +11V
L
+5V +5V
6267
+5D +5D L7805
+11V 1 3
3258 3256
2276
2 MFD 0V 2
100n
M
POWER DOWN
REF REF
2278
4 7253
CIRCUIT
µ
2 2 BC847B
S S S
1 Relay +3,6V
N .....V - Voltage measured during normal operation
To 1057
- Source position : Tuner FM
Mains part
- No special features ON
Monoboard Supply FR975
.....V Stand by
3104 217 06430
1 2 3 4 5 6
PCS 105 729
H6 6256 J7 6262 I3 6280 F6 7257 E5
1 2
I7 6257 H3 6263 I4 6281 F6 7258 E6
D5 6258 H3 6264 J7 7251 J5 7908 H6
LEFT & RIGHT & CENTER AMPLIFIER FR760 - FR975
B4 6259 H4 6267 L6 7252 K5 7910 G6
B5 6260 H6 6268 K2 7253 M3 9260 E5
J7 6261 I3 6276 E7 7254 L6 A
Left in
from Left out
7 8 9 10
Right in
from Right out
From
Volume Center in
Control from Center out
Part
A
B Surround Right in
from Surround Right out
Surround Left in
from Surround Left out
+VL
+32V
2260
0V
4700µ
To/From
B C
A
amp lr on
1520
Volume
+VH
Control
+52V amp prot
Part
2264
0V
4700µ
A
C D
–VH
–52V
2262 0V
4700 µ
A
–VL
–32V
2259
0V D E
4700µ
A
–30
–32V
0V E F
–26V
3266 To
Left & Right
3270 3271
& Center
S
Amplifier
G
F
–26V
–26V
amp
prot
G H
1266
–12
–13,5V 1 +VH
+VH
2282 0V +52V
+52V
3292
470n 0V
+VL 2
+VL
REF +32V
+32V
H I
0V
3
+0,5V
4
3295
+12 5
+12V
A
0V
I J
–VL 6 –VL
–32V
–32V
0V
–VH 7
–VH
–52V
–52V
6256
+5
0V
8
+5V
1N4148
2301 2357
+6 A
J K
To 1903
+6,8V
Surround 22n 100n
0V amplifier
2274
IN_LR A IN_C
470n
REF amp
REF
prot
K L
A S DIG 9309
+VL
+32V
2306
10µ
1257
A
8
f1
3301
7 +VH
L M From
47E
f2
Monoboard +52V
Supply 2305 2303
–30 6 –30
µ
Part 10µ 22
–32V –32V
+5D A A
0V
5
+5V 9310
–VL
2277 5V DIG –32V
2349
+5D 4 +5D
470n
+5V +5V 5V M N
10µ
REF
A
+5 3 +5
+5V +5V 0V
5V +5V
2 3328
amp pd
–VH
47E
–52V
1
2354 2353
amp stdby
µ µ
10 22
O
N
To 1426 A A
Front Part
LEFT & RIGHT & CENTER & SURROUND AMPLIFIER FR760 - FR975
LEU0172/0015
3104 217 06410 / 06430
LEU0172R/0015
1 2
7 8 9 10
10-7
3 4 5 6 7 8 9
2313
3310
220p
100µ 2315 IN_LR
µ
47
2310 3361 IN_LR
18
470E
10µ
2311
+52V
3308
+VH 470p
3302
IN_LR IN_LR
AMP ON/OFF
1E
19
3357
CIRCUIT
A AA
+3V
7309
BC856B
6304 7304 –48V 2316 3362
22
6305 3327 3358
BC846B 470E
+4,9V +4,4V BZX284/ –51V –48V
3329 220E 1k µ
A C3V3 10
BAS216 2319
100k
3314
–50V
2365 470p
2350
3356 3330 3326
µ IN_LR IN_LR
1000
10n
21
A AA
–VP –VP –VP
–50V 20
–51V –51V –51V
2334 3363
–51V 24
470E
3359
–50V
7310
100k 10µ
BC847B 2337
7261 3322
470p
6290
fmute –50V BC856B 3360
3943 IN_C IN_C
0V
BAS216
22k
23
–VP –VP
2299 2298
3251 –51V –51V
2341
10 µ 22n
3323
220p
REF REF REF
+3,2V
100 µ
3252 2346 IN_C
47µ
100k
IN_C
6289
–51V 7260
3253
BAS216 BC846B
–VH –VH –VH
–52V –52V –52V
2325
+12V +5V +5V
3315
+12 +5D +5D 220p
3320 6303
µ
100
HST & DC 2330 IN_LR 1k
6266
47µ 1N4148
BZX79/ 3259 3260
PROTECTION
+5V
C15
IN_LR
+5D
CIRCUIT 0V
7255 +5V
3276 BC857B
6270
3272
+4,2V 3351 3345
BZX79/
6271
C6V8
0V
+5V
0V 0V
1N4148
+5D
2280
7259 7256 3264
100µ
BC847B BC847B
3263 REF REF REF REF
3267
+4,2V
6k8
6279
1N4148
SURROUND AMPLIFIER FR760 - FR975
REF
4904
–50,7V –50V
6904 3936
7909
100k
BC847B 2905
BAS216 µ
10
3937 IN_S
3946
470E
–VH1 –VH1
–51,2V –51,2V
AMP ON/OFF CIRCUIT
7902
3918 3935
–47,8V BC846B –51V
220E 1k
3920
amp off
100k 2913 3947
470E
2925
µ
+VH 3925 3917 10
+VL
1903 1000µ
+52V
+32V
3901
+VH 1 +VH1 A
47E –VH1 –VH1 –VH1
+52V +32V
–51,2V –51,2V –51,2V
2943 2942
+VH
10µ 22µ
+52V
A A
+VL 2 +VL
+VP
+32V +32V
+51V
3
2902
10 µ
4
A IN_S
5
–VL
–32V
A
–VL 6 –VL
3934 6901
–32V –32V
1k
2924 –VH
BAS216
µ
–VH 10
–52V
–52V 3915
–VH 7 A –VH1
47E 2911
–VP –52V –51,2V
8
–51V 2944 2945
22n
10µ 22µ
IN_S A
A A A
From 1266
Monoboard
supply Part
3 4 5 6 7 8 9
10 11 12 13 14 15
+51V +32V +52V
2308
+VP +VL +VH
AA
7302
10p
STK496-630 3304
17 3 4 1 12 0V 13
2309
+VP nc +VL +VH PTC1 PTC2
10p
hst
IN1
PTC
OUT1 14
NF1 6301
+ZD 5 +VL
+23,4V +32V
BZX79
CONTROL
/C9V1
GND 2
IN2
3303
A A
OUT2 15
NF2 6302
–ZD 6 –VL
CCC –23,4V –32V
BZX79
CONTROL
/C9V1
IN3
3325
A
OUT3 26
NF3
2345 2326
–VP –VC3 –VC2 –VC1 –V0 –VL –VH
10p 10p
3324 3319
16 25 11 10 9 7 8
2348 2327
9303 10p 10p
–VP –VH
–51V 9305 –52V
–VL
–32V
SOAR PROTECTION
+3V
7306
3336 7307 3334 3335
–31V –31V –31V –31V
BC846B
1k8 BC846B 1k8 1k8
7305
BC846B
3343 3339 9307 3340
3344 3349 3337 3338 3341 3342 3350
–V0
–31V
hst
+51,2V +32V +52V
2910
3908 +VH1 +VL +VH
220p
7905 2938
STK496-430 17 3 4 1 12 13
2912 IN_S 0V 10p
3902
100µ +VH1 nc +VL +VH PTC1 PTC2 2939
µ
47 10p
18 IN1 PTC
2906
3906
OUT1 14
470p
IN_S IN_S 6905
+ZD 5
+VL
19 NF1
+32V
+23V
BZX284
/C9V1
–50V 20 CCC GND 2
3907
CONTROL
A A
22 IN2
6903
–ZD 6 –VL
–23V –32V
2914 BZX284
3911
/C9V1
470p
3909
IN_S IN_S
A
21 NF2 OUT2 15
2918
3913 2941
220p –VH1 –VC2 –VC1 –V01 –VL –VH
10p
3914
2919 IN_S 16 11 10 9 7 8 2940
100 µ
10p
–VH1 –VL –VH
µ
47
–51,2V –32V –52V
SOAR PROTECTION
9928
+3V
+3V
3921 7904 3922
–32V –32V –32V –32V
BC846B
1k8 1k8
7903
Only FR760 BC846B
9926 3928 3929
3932 3926 3927 3930 3931 3933
Only FR975
–V01
–32V
10 11 12 13 14 15
10-7
16 17 18 19 20
1301 B20 3336 G10
1302 B18 3337 H11
1303 F18 3338 H12
1304 F20 3339 H12
A
1305 B18 3340 H14
1901 K19 3341 H14
1903 L4 3342 H15
2280 H6 3343 H10
2298 E5 3344 H10
2299 E4 3345 H9
2301 K1 3349 H10
1302 1305 1301
5301 2303 M2 3350 H15
B 2305 M2 3351 H8
1µ
2 2 1
3309 2306 L2 3352 C17
2308 A16 3353 D17
4E7
2371
2309 A16 3354 E17
3306 L
4n7
3352 2310 B8 3356 D3
1 1 2
2311 B9 3357 C4
2358
2313 A9 3358 C6
220n A
2374
2314 C17 3359 D6
2314
100p C 2315 A8 3360 E6
5303 220n
2316 C8 3361 B8
1µ A 2317 G19 3362 C8
4 4 4
3311 2319 C9 3363 D8
4E7 2321 D17 3901 L5
2372
3305 R 2322 G19 3902 J15
4n7
3353
2325 G8 3903 L18
3 3 5
2326 E16 3904 K18
2359
D 2327 E16 3905 K16
220n A
2375
2328 H19 3906 K10
2321
100p
2330 G7 3907 L15
5305 220n
2331 H19 3908 J10
1µ A
6 6 7 2333 E17 3909 L15
3316
2334 D8 3910 M16
4E7
2373 2335 I19 3911 L10
3307 C
2337 D9 3913 M10
4n7
3354
2339 J19 3914 M15
5 5 8 E
2360 2341 E9 3915 N5
220n A 2345 E15 3916 K17
2376
2346 F8 3917 L7
2333 3 6
100p
2348 E15 3918 L7
220n
2349 N2 3919 M17
A
Only in FR975
2350 C6 3920 L6
2353 O2 3921 N12
2354 O2 3922 N15
F
1303 1304 2357 K2 3925 L6
2358 C17 3926 O12
2 5
2359 D17 3927 O12
2360 E17 3928 O13
2317 2365 C4 3929 O14
L
4n7 2371 B19 3930 O15
1 6 2372 D19 3931 O15
2373 E19 3932 O11
G
2322 2374 C19 3933 O16
2375 D19 3934 N9
100p
2376 E19 3935 L8
2902 M5 3936 J7
4 3
2905 J9 3937 J7
2906 K10 3943 E5
2328
2908 L17 3946 J9
R
4n7
2909 K18 3947 L9
H
3 4
2910 J10 4904 J9
0V
2911 O8 5301 B16
2331
2912 J10 5303 C16
100p 2913 L9 5305 D16
2914 L10 5901 K16
2916 N17 5902 L16
6 1
2917 M18 6266 G5
2918 M10 6270 H6
2335 I
C 2919 M10 6271 H6
4n7
2920 M17 6279 I3
5 2
2921 L17 6289 F4
2924 N4 6290 E3
2339
2925 L7 6301 B15
7
100p
2930 L18 6302 D15
2931 L18 6303 G9
Only in FR760 2938 J16 6304 C4
J
2939 J16 6305 C3
2940 M16 6901 N9
2941 M16 6903 L15
2942 M5 6904 J6
2943 M5 6905 K15
1901 SURROUND 2944 O5 7255 G5
5901
2945 O5 7256 H5
µ
1 9904 4
3251 E5 7259 H4
3905
K
3252 F5 7260 F5
4E7
2909 3253 F5 7261 E4
R
3904
4n7 3259 G6 7302 A10
3916
3 3260 G6 7304 C5
2921
3263 H3 7305 G13
A
220n 3264 H6 7306 G13
2930
3267 I5 7307 G10
2908
chassis 100p
3272 H4 7309 C4
220n
L
3276 H5 7310 D7
A
3301 M2 7902 K6
2931 3302 B6 7903 O14
3903
5902 3303 C15 7904 N14
100p
3304 A15 7905 J11
1µ 2
3305 D17 7909 J7
3910
3306 B17 9303 F13
4E7
2917
L 3307 E17 9305 F12
4n7 M 3308 B8 9307 H12
3919
1
3309 B16 9309 L2
2920
3310 A8 9310 N2
220n 3311 C16 9904 K17
9906
2916 3314 C8 9906 N18
3315 G7 9926 O13
220n
3316 E16 9928 N12
A A
3319 E15
N 3320 G9
3322 D8
3323 E8
3324 E14
.....V - Voltage measured during normal operation 3325 D15
- Source position : Tuner FM 3326 D6
- No special features ON 3327 C6
3328 N2
.....V Stand by
3329 C5
O
3330 D5
3334 G12
3335 G14
LEU0175/0015
LEU0175R/0015
16 17 18 19 20