Philips FR-975, Service Manual

Page: 59 / 75

PCS 105 729
10-6 10-7 10-7
3104 217 06430
Monoboard Supply FR975
3
2
1
100n
1N4003GP
4x
100n 1N4003GP
1N4003GP
0E33
1
4
2
3
1
2
Front Part
To 1426
amp stdby
amp pd
1
4
3
2
BC847B
2
10k 82k
+5D
L7805
REF
100n
1
REF
2
3
+5D
S DIG
f1
f2
+V
Relay
MFD
+24
amp
prot
S
amp
prot
S S
+5D
S
470n
REF
S
REF
REF REF
100n
3
2
1
470n
L7812GP
+12
1N4003GP
REF
100n
+6
µ
3300
1000
µ
0E33
S
15k
15k 10k
10n
100n
REF
10k
BC857B
BD242BFP
10E
–12
3
4
5
6
f2
7
f1
8
+5D
+5
–30 –30
+5D
+5
DIG
Left & Right
To
A
3
8
7
2
1 +VH
–VH
–VH
+VH
& Center
Amplifier
A
REF
470n
REF
10
REF
µ
REF
To 1072
Mains trafo
To 1071
Mains trafo
To 1903
Surround
amplifier
To 1057
Mains part
4
2
µ
BD242BFP
10n
390E
150E
REF REF REF REF
100n
270E
10k
270E
BZX79/ 47
µ
C5V6
BC847B
470n
REF
BC847B
6
5
–VL
–VL
+VL
+VL
A
4700
µ
D5SBA20
100n
100n 4700
µ
µ
4700
+VH
–VH
4
5
3
2
1
D5SBA20
47n
47n
+VL
–VL
4700
µ
4700
µ
–30
BC327-25 BC327-25
3k3
BZX79/C10
22k
BZX79/
C5V6
5
4
3
2
1
47E 47E
47E
3k3
BZX79/C22
A
A
A
A
A
S
S
Mains trafo
To 1073/1074
6,3A
6,3A
1N4148 1N4148
+5
MONOBOARD SUPPLY FR975
POWER DOWN
CIRCUIT
–30V CIRCUIT
LEU0172/0015
4253
2269
2290
2282
1266
3291
7910
7908
3294
2281
2295
3293 3292
3295
3257
2275
2287
2273
6268
6260
2271
2270
2277
6267
2276
3258
7253
2278
3256
1254
1257
1255
3254
6261
6263 6262
6259 6258
6257 2266
2268
1253
7251
2257
3261
3275
2279
3274
3262
3273
6264
2267
7254
2274
7252
6281
6251
2251
2254
2264
2262
1252 1251
6253
2256
2253
2259
2260
7257 7258
3269
6280
3266
6276
3270 3271
3265
3268
9260
1260
1261
6255 6256
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
A A
B B
C C
D D
E E
F F
G G
H H
I I
J J
K K
L L
M M
N N
1251 A1
1252 A1
1253 H1
1254 L1
1255 F1
1257 K9
1260 B3
1261 C3
1266 G9
2251 B3
2253 B4
2254 C4
2256 C6
2257 J5
2259 D7
2260 B7
2262 C7
2264 C7
2266 H3
2267 J6
2268 I4
2269 I4
2270 I5
2271 I7
2273 K4
2274 J7
2275 K4
2276 M5
2277 M7
2278 M2
2279 K5
2281 H5
2282 H7
2287 K4
2290 H5
2295 H6
3254 J3
3256 M3
3257 L3
3258 M3
3261 K5
3262 K6
3265 E5
3266 F7
3268 E5
3269 E6
3270 F7
3271 F8
3273 K6
3274 K7
3275 L7
3291 G4
3292 H7
3293 H6
3294 H6
3295 I7
4253 D5
6251 B4
6253 B5
6255 J7
6256 J7
6257 H3
6258 H3
6259 H4
6260 H6
6261 I3
6262 I3
6263 I4
6264 J7
6267 L6
6268 K2
6276 E7
6280 F6
6281 F6
7251 J5
7252 K5
7253 M3
7254 L6
7257 E5
7258 E6
7908 H6
7910 G6
9260 E5
+11V
+12V
+24V
+4V
0V
+5V
21V
~
+5V
4,6V
~
5V
–32V
+5V
+5V
+5V
+0,5V
–31V
–22V
–14V
5V
+5V
0V
+6,8V
0V
+12V
0V
–13,5V
–52V
+52V
5V +5V
+5V 0V
–32V
0V
–52V
+52V
+3,6V
–32V
–32V
+32V
+32V
0V
0V
- Voltage measured during normal operation
- Source position : Tuner FM
- No special features ON
.....V
.....V
Stand by
78V
~
–52V
–41,6V
–32,5V
–26V
–26V
–26V
–32V
0V
0V
–52V
0V
+52V
0V
0V
48V
~
+32V
–32V
+5V
0V
0V
LEU0172R/0015
–41V
+0,1V
+11V
+0,1V
+0,6V
+0,6V
+1V
+11V
+9,5V
LEU0175/0015
3104 217 06410 / 06430
LEFT & RIGHT & CENTER & SURROUND AMPLIFIER FR760 - FR975
100k
From 1266
Monoboard
–VH
7
4
47E
22
µ
+VH
3
1
10
µ
47E
22
µ
BC846B
10k 33k
220E
1000
µ
–VH
–VH1
56k
470p
1k8
+VH1
+VH
220p
1
4
R
220n
4n7
3
2
L
IN_S
IN_S
IN_S IN_S 4E7
µ
1
4E7
220n
A
4E7
1
µ
A
220n
220n
4E7
47k
A
4n7
A
SURROUND
47k
10
µ
A A
A A
A
IN_S
1k8
IN_S
220p
56k
IN_S IN_S
470p
A
100p
100p
chassis
1k8
IN_C
56k
IN_C
23 NF3
IN_C
220p
IN3
CCC
IN_C
470p
24
20
–VP
16
–VP
IN_LR
56k
IN_LR
1k8
STK496-630
IN1
NF1
IN_LR
19
18
470p
IN_LR
220p
+VP
17
+VP
25
–VC3 –VC2
11
56k
OUT3 26
10p
PTC
PTC1
12
PTC2
13
OUT1 14
NF2
IN2
supply Part
–VC1
10
4E7
1
µ
A
220n
220n
4E7
10p
56k
10p
10p
56k
10p
10p
+VL +VH
+VH
4
+VL
1
CONTROL
22
21
9
–VH
7
–VL
8
–V0 –VL –VH
0E33 0E33
1k8
1k5
0E33
BC846B
1k5
0E33 0E33
BC846B
0E33
1k8
0E33 0E33 0E33
1k8
1k5
BC846B
CONTROL
OUT2 15 56k
IN_LR IN_LR
470p
10
µ
BZX79
6k8
5 +ZD
220n
220n
A
4E7
1
µ
4E7
220n
220n
A
4E7
1
µ
4E7
GND 2
/C9V1
–ZD
/C9V1
BZX79
6k8
10
µ
6
AA
A
A
A
A
A
hst
1k8
IN_LR
220p
IN_LR
A
A
10
47E
µ
A
µ
22
–VP
47E
µ
22
+VP
+VL
+VL
–VL
+VL
+VH
10
µ
A
–VH
–VL –VL
22n
A IN_S
22n
BC856B
BZX284/
BAS216
47k
A
A
10n
C3V3
–VP –VP
BC846B
10k
100k
AA
33k
220E
1000
–VP
22k
+VH
µ
BC847B
39k
+5D
REF
BC847B
REF
1N4148
REF
100k
REF
+5D
680E
47k
+5D
BZX79/
100
µ
REF
BC857B
1N4148
680E
+5D
47k
47k
47k
2
1
L
5
6
4
3
1
2
A
A
A
5
4
3
1
2
6
5
R
8
C
4
7
4n7
100p
100p
4n7
100p
4n7
3 6
6k8
Part
Right in
from Right out
from Left out
Left in
Control
Volume
From
from Center out
Center in
Surround Left in
from Surround Left out
from Surround Right out
Surround Right in
Control
Volume
Part
To/From
amp prot
amp lr on
Supply
Part
Monoboard
From
prot
amp
1520
+VH
–VH
–VH1 –VH1 –VH1
1k
BC847B
–VP
10k
100k
–VP
10k
100k
BC847B
1k
BAS216
–VH1 –VH1
1N4148
1k
1k
BAS216
22n
1k
REF
22k
REF
BC846B
100k
100k
BAS216
–VH –VH –VH
REF
BC856B
µ
10
fmute
–V0
BAS216
470E
470E
470E
470E
470E
5
3
nc
10
µ
µ
10
10
µ
100
µ
µ
10
µ
10
µ
100
amp off
100k
C6V8
BZX79/
C15
+12
8
A
–VL –VL
6
2
+VL +VL
Only in FR975
4n7
100p
4n7
100p
4n7
100p
Only in FR760
5
6
3
4
1
2
2
1
7
C
4
3
6
5
R
L
0E33 0E33
–VH1
–VH1
16
22
21
20
19
18
+VH1
IN2
NF2
CCC
NF1
IN1
+VH1
STK496-430 17
/C9V1
BZX284
BZX284
/C9V1
–VH
8
–VH
BC846B
BC846B
0E33
1k8
1k5
–VC1 –VC2
11 10
–VL
–V01
9
–VL
7
1k8
1k5
0E33 0E33 0E33
A
+VH +VL nc
+VL
3 4
+VH
1
PTC2 PTC1
OUT1
+ZD
GND
OUT2
–ZD
CONTROL
PTC
6k8
6
15
A
6k8
A
5
2
14
12 13
–VL
+VL
–V01
hst
10p
56k
10p
56k
10p
10p
µ
A
10
µ
A
10
1E
A AA
IN_C
100n
A IN_LR
Only FR760
Only FR975
µ
47
µ
47
µ
47
100
µ
µ
100
47
µ
µ
100
47
µ
SURROUND AMPLIFIER FR760 - FR975
SOAR PROTECTION
CIRCUIT
AMP ON/OFF
PROTECTION
CIRCUIT
LEFT & RIGHT & CENTER AMPLIFIER FR760 - FR975
HST & DC
AMP ON/OFF CIRCUIT
SOAR PROTECTION
2357
3302
2299
7261
6289
3253
3252
7260
3943
3251
2298
6901 3934
3320 6303
6904
3935
7909
3936
3937
7310
3359
3360
3358
4904
3267
2373
2376
2372
2375
2374
2371
1301 1305 1302
3306
3305
3307
3263
6271
7255
2280
6270
3260 3259
3264
6279
7256
3272
7259
3357
7309
2350
3327
3326 3330
3329
2365
3356
6305
6304
7304
2301
2911
9310
2305
9309
2303
3301
2353 2354
3328
2325
3315
2330
6302
2349
3325
5305
3316
3354
2333
2360
5303
3311
3353
2321
2359
3303
6301
2306
9303
9305
2319
3314
2316
7307
3336
3343
3344 3345 3351 3350
7306
3341
3335
3342
3340
7305
3337
3339
3338
3334
3349
9307
2326
2327
3319
2308
2309
3304
2345
3352
2314
2358
5301
3309
2348
3324
7302
2313
2311
2315
3310
3308
2310
2337
2341
3322
3323
2346
2334
2931
9906
2930
2914
3911
2918
2919
3913
2944
3903
2917
3919
2920
2916
3910
5902
9904
2908
3916
3905
3920
3915
2945
2943
3901
2942
7902
3925 3917
3918
2925
2913
3906
2906
3908
2912
2910
1901
2921
3904
2909
5901
1903
6290
3361
3362
3363
2905
3946
3947
3276
6266
2317
2322
2328
2331
2335
2339
1303 1304
3926 3932
7905
7904
3921
3928
3927
9926
7903
9928
3922
3930
3929
3931
3909
6903
3907
6905
3933
3902
2938
2939
3914
2940
2941
2924
2902
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
A A
B B
C C
D D
E E
F F
G G
H H
I I
J J
K K
L L
M M
N N
O O
1301 B20
1302 B18
1303 F18
1304 F20
1305 B18
1901 K19
1903 L4
2280 H6
2298 E5
2299 E4
2301 K1
2303 M2
2305 M2
2306 L2
2308 A16
2309 A16
2310 B8
2311 B9
2313 A9
2314 C17
2315 A8
2316 C8
2317 G19
2319 C9
2321 D17
2322 G19
2325 G8
2326 E16
2327 E16
2328 H19
2330 G7
2331 H19
2333 E17
2334 D8
2335 I19
2337 D9
2339 J19
2341 E9
2345 E15
2346 F8
2348 E15
2349 N2
2350 C6
2353 O2
2354 O2
2357 K2
2358 C17
2359 D17
2360 E17
2365 C4
2371 B19
2372 D19
2373 E19
2374 C19
2375 D19
2376 E19
2902 M5
2905 J9
2906 K10
2908 L17
2909 K18
2910 J10
2911 O8
2912 J10
2913 L9
2914 L10
2916 N17
2917 M18
2918 M10
2919 M10
2920 M17
2921 L17
2924 N4
2925 L7
2930 L18
2931 L18
2938 J16
2939 J16
2940 M16
2941 M16
2942 M5
2943 M5
2944 O5
2945 O5
3251 E5
3252 F5
3253 F5
3259 G6
3260 G6
3263 H3
3264 H6
3267 I5
3272 H4
3276 H5
3301 M2
3302 B6
3303 C15
3304 A15
3305 D17
3306 B17
3307 E17
3308 B8
3309 B16
3310 A8
3311 C16
3314 C8
3315 G7
3316 E16
3319 E15
3320 G9
3322 D8
3323 E8
3324 E14
3325 D15
3326 D6
3327 C6
3328 N2
3329 C5
3330 D5
3334 G12
3335 G14
3336 G10
3337 H11
3338 H12
3339 H12
3340 H14
3341 H14
3342 H15
3343 H10
3344 H10
3345 H9
3349 H10
3350 H15
3351 H8
3352 C17
3353 D17
3354 E17
3356 D3
3357 C4
3358 C6
3359 D6
3360 E6
3361 B8
3362 C8
3363 D8
3901 L5
3902 J15
3903 L18
3904 K18
3905 K16
3906 K10
3907 L15
3908 J10
3909 L15
3910 M16
3911 L10
3913 M10
3914 M15
3915 N5
3916 K17
3917 L7
3918 L7
3919 M17
3920 L6
3921 N12
3922 N15
3925 L6
3926 O12
3927 O12
3928 O13
3929 O14
3930 O15
3931 O15
3932 O11
3933 O16
3934 N9
3935 L8
3936 J7
3937 J7
3943 E5
3946 J9
3947 L9
4904 J9
5301 B16
5303 C16
5305 D16
5901 K16
5902 L16
6266 G5
6270 H6
6271 H6
6279 I3
6289 F4
6290 E3
6301 B15
6302 D15
6303 G9
6304 C4
6305 C3
6901 N9
6903 L15
6904 J6
6905 K15
7255 G5
7256 H5
7259 H4
7260 F5
7261 E4
7302 A10
7304 C5
7305 G13
7306 G13
7307 G10
7309 C4
7310 D7
7902 K6
7903 O14
7904 N14
7905 J11
7909 J7
9303 F13
9305 F12
9307 H12
9309 L2
9310 N2
9904 K17
9906 N18
9926 O13
9928 N12
LEU0175R/0015
–32V
–52V –51V
–52V
–32V
+52V
+32V
+51V
+52V
+32V
+5V
–52V –51,2V
–52V
+3V
–51,2V
–51,2V
+52V
–51,2V
+52V
+32V
–51,2V
–47,8V –51V
–51,2V
0V
–50V
–50V
+4,4V
–51V –51V
+5V
+4,2V
+5V
–52V –52V
+5V
+5V
–52V
+3,2V
–48V
–51V –51V
+3V
–51V
–51V
–50V
–31V
–51V
+52V
+51V
- Voltage measured during normal operation
- Source position : Tuner FM
- No special features ON
.....V Stand by
.....V
–52V
–31V
+3V
–32V
–31V –31V
–23,4V
+23,4V
–32V
+32V
+32V +52V
0V
+12V
0V
–32V –32V
+32V +32V
–51,2V
+51,2V
–52V
–32V
+3V
–32V
–32V –32V
+32V +52V
–23V
+23V
0V
–32V
+32V
–31V
0V
+4,9V
–50V
–48V
–50V
–51V
–51V
0V
–50V
0V
+4,2V
0V
–50,7V
–32V
–32V
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