Philips FW-C798/21/37 Service Manual page 61

LEFT/RIGHT AMPLIFIER & SUPPLY BOARD - CIRCUIT DIAGRAM (PART 1)
1 2
EH-B EH-B
1250 1251
1
A1
2
B1
3
GND_D
A
4
GND_D
5 27.5V
B2
6
A2
7
+D
8
GND
9
+D2
*
B
12.5V
7251 0V
BC547B
GND_M
+11V Reg
C
7254
BDW94C
3258
22K
D
3259
GND
470K
7255
BC547B
7256
BC547B
E
CDR ONLY
FE-BT-VK-N
1252
1
-Vkk
2
F1
F
3
F2
4
PD
5
NTC
3265
6
LSTBY
2K2
7
LPS
* : PROVISION
Note : Some values may varies, see respective parts list for correct value.
1 2
11-5
3 4
B1
BZX79-C15
+11V_A
+11V_M
2250
100u
/50V
7250
3290
*
BDX53BFP 11.8V
STP16NE06
7240
0R33
9960
12.9V
GND_M
*
BC547B
7252
*
2252
7242
12.8V
BC547B
3n3
7253 0.6V
BC547B
0V
GND_M GND_M
CDR only
9252
NON CDR
9253
CDR ONLY
7257
L7805
13V
1 3 5.7V
IN OUT
GND
2
0.6V
GND
NON-CDR
3269 6256
+5V6
+11V_M
6K8 1N4148
GND GND
6257
1N4148
7301
*
7259 BC547B
BC337-25
0V
6258
3272
0.6V
5K6
BZX79-B5V6
0V
GND GND
3 4
5 6
6250
3257
10K
9962 +11V_cdr 3273
5.7V
+5V6
680R
BC557B
7261
0.3V
VCD_ON
B1
4.8V
7260
BC547B
3275
0.3V
33K
0V
7241
GND GND GND
BC547B
SAT
GND_M
* 6262
*
*
+5V6 1N4148
* *
GND GND
LPS
0V GND
0.6V
7262 3281
BC547B
39K
0V
GND GND
+11V_M
11.7V
*
BC327-25
3405
* 7300
120K
EH-B
1300
9964
11.6V
9965 1
3407
*
2
120K
To fan
gnd_f gnd_f
Heatsink NTC
5 6
11-5
7 8 9
+5V6
FFC FFC
1259 1260
AMP_LR_DC
6259
5.7V
BZX79-C6V8
6260
1N4148
GND GND
To AF
NTC
+5V6
To AF
3282
+5V
3K9
EH-B
1262
LPS
GND
5V
5V
7263
BC547B
To AF
4.5V
GND
BD438
7264
+5V6
VCD_ON
7265
BC547B
1322_A
gnd_al gnd_ar
GND GND GND
VCD 5V GND GND_D
3139 118 55340...for 91570...3472 pt1 dd wk0151
7 8 9
1250 A1 7242 B4
1251 A1 7250 A2
1252 F1 7251 B2
1259 A9 7252 B3
1260 A9 7253 B3
1261 A9 7254 C1
1262 C9 7255 E1
1263 C9 7256 E1
1264 E9 7257 C3
1280 B1 7259 F3
FFC
1300 F7 7260 A6
1261
1322_A F9 7261 A6
1 1323_A F9 7262 D6
AF_left
A
2250 A3 7263 D7
2251 A3 7264 E7
2
GND_pa
2252 B3 7265 F7
2253 A4 7300 F6
3
AF_right
2254 E1 7301 F4
2255 D1 9250 C1
4
NTC 2256 D2 9251 C1
2257 D3 9252 C4
5
2258 D3 9253 C4
LPC
2259 D4 9960 A3
6
PD 2260 B6 9962 A5
2261 B7 9964 F5
7
2262 C6 9965 F5
CLIP
2263 C7
8
2265 F8
AMP_ON
2300 F6
9
-Vkk
3250 A2
B
3251 B2
10
3252 B2
F1
3253 B2
11 3254 B3
F2
3255 B3
12 3256 B3
AMP_CS_DC
3257 A5
13
3258 D1
CDR ON
3259 D1
or
3260 D1
To AF VCD_ON
3261 D1
3262 D2
3263 E2
3264 D4
VCD sets only
3265 F2
EH-B
C
3268 E3
1263
3269 E3
1
LPS
3270 E4
3271 F3
2
+11V_A 3272 F4
3273 A6
3
3274 B6
GND_A
3275 A7
4
3276 A7
+11V_M
3277 B7
5
3278 C6
GND_M
3279 D6
6
3280 D6
+5V6
3281 D7
7 D
3282 C7
GND_D
3283 C7
8
3284 D7
5V_VCD
3285 D7
3286 F7
To AF
3287 F7
3288 F8
3289 F8
3290 A3
3292 F4
3295 C7
CDR sets only
3300 F5
EH-B
3301 F5
1264
3302 E6
1
+11V_cdr 3303 F6
E
3304 E6
2
3305 F6
GND_M
3306 F6
3
3400 A4
GND_D
3401 A4
4
3402 B5
GND_D
3403 B5
5
3405 F5
5V_CDR
3406 E4
6 3407 F5
5V_CDR
3409 B4
6250 A5
To CDR 6251 A3
6252 D2
F 6253 D3
1323_A 6254 D4
6256 E4
6257 E3
6258 F4
6259 A7
6260 A7
6261 C6
6262 C6
6263 C7
gnd_f
GND_A GND_M
6264 F7
6265 D6
7240 A4
7241 B5