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LEFT/RIGHT AMPLIFIER & SUPPLY BOARD - CIRCUIT DIAGRAM (PART 1)
1
2
EH-B
EH-B
1250
1251
1
A1
2
B1
3
GND_D
4
GND_D
A
5
27.5V
B2
6
A2
7
+D
8
GND
9
+D2
*
12.5V
B
7251
BC547B
0V
GND_M
+11V Reg
C
7254
BDW94C
3258
22K
D
3259
GND
470K
7255
BC547B
7256
BC547B
E
VCD/CDR
FE-BT-VK-N
1252
1
-Vkk
2
F1
3
F2
F
4
PD
5
NTC
3265
LSTBY
6
1K
7
LPS
: PROVISION
*
Note : Some values may varies, see respective parts list for correct value.
1
2
11-5
3
4
B1
6250
BZX79-C15
2250
+11V_A
100u
/50V
+11V_M
7250
3290
*
BDX53BFP
9962
11.8V
0R33
9960
12.9V
*
BC547B
7252
*
2252
3n3
GND_M
12.8V
7253
0V
0.6V
BC547B
0V
CDR only
GND_M
GND_M
9252
NON CDR
9253
VCD/CDR
7257
L7805
13V
1
3
5.7V
IN
OUT
GND
0.6V
2
GND
NON-VCD/-CDR
3269
6256
+5V6
1N4148
6K8
+11V_M
GND
GND
6257
1N4148
7259
0V
BC337-25
6258
3272
0.6V
5K6
BZX79-C6V8
0V
GND
GND
Heatsink thermal NTC
3
4
5
6
3257
10K
3273
5.7V
+5V6
680R
5.7V
BC557B
+11V_cdr
7261
0.3V
STP16NE06
7240
4.8V
7260
VCD_ON
B1
BC547B
3275
0.3V
33K
0V
7241
BC547B
GND
GND
GND
SAT
GND_M
*
*
6262
3282
*
+5V6
1N4148
*
*
GND
GND
LPS
0V
GND
7262
0.6V
3281
BC547B
39K
0V
GND
GND
+5V6
+11V_M
11.7V
11.3V
EH-B
1300
11.3V
1
BC327-25
2
7300
To fan
gnd_f
gnd_f
VCD/CDR
Fan Speed Control
5
6
11-5
7
8
9
+5V6
FFC
FFC
1259
1260
AMP_LR_DC
6259
BZX79-C6V8
6260
1N4148
GND
GND
+5V6
To AF9
NTC
To AF9
+5V
3K9
EH-B
1262
LPS
GND
5V
7263
5V
BC547B
To AF9
4.5V
GND
BD438
7264
VCD_ON
7265
BC547B
1322_A
1323_A
gnd_al
gnd_ar
GND
GND
GND
GND
GND_D
GND_A
3139 118 53720...for 88130...3434 pt3 dd wk0047
7
8
9
1250 A1
7254 C1
1251 A1
7255 E1
1252 F1
7256 E2
1259 A9
7257 C4
1260 A9
7259 F4
1261 A9
7260 A6
1262 C9
7261 A7
1263 C9
7262 D6
1264 E9
7263 D7
FFC
1280 B1
7264 E7
1261
1300 F6
7265 F8
1
1322_A F9
7300 F5
AF_left
1323_A F9
9250 C1
2
A
2250 A3
9251 C1
GND_pa
2251 A3
9252 C4
3
2252 B3
9253 C4
AF_right
2253 A4
9960 A3
4
2254 E1
9962 A4
NTC
2255 D1
5
2256 D2
LPC
2257 D3
2258 D3
6
PD
2259 D4
2260 B6
7
CLIP
2261 B7
2262 C7
8
AMP_ON
2263 C7
2265 F8
9
-Vkk
2300 F5
3250 A2
10
B
F1
3251 A2
3252 A2
11
3253 A2
F2
3254 A3
12
3255 B4
AMP_CS_DC
3256 B4
13
3257 A5
CDR ON
or
3258 D1
VCD_ON
3259 D1
To AF9
3260 D1
3261 D1
3262 D2
VCD sets only
3263 E2
EH-B
3264 D4
1263
3265 F2
C
3268 E3
1
LPS
3269 E4
3270 E4
2
+11V_A
3271 F3
3272 F4
3
GND_A
3273 A6
3274 B6
4
+11V_M
3275 A7
3276 A7
5
GND_M
3277 B7
3278 C6
6
3279 D6
+5V6
3280 D6
7
3281 D7
GND_D
D
3282 C7
8
3283 C7
5V_VCD
3284 D7
To AF9
3285 D7
3286 E7
3287 E7
3288 E8
3289 F8
3290 A3
CDR sets only
3295 C7
EH-B
3300 F5
3301 F5
1264
3302 E5
1
+11V_cdr
3303 F5
3304 E6
2
E
3305 E6
GND_M
3306 E6
3
GND_D
3400 B4
3401 B5
4
3402 B5
GND_D
3403 B5
5
6250 A4
5V_CDR
6251 A4
6
6252 D2
5V_CDR
6253 D3
6254 D4
To CDR
6256 E4
6257 E4
6258 F4
F
6259 A7
6260 A7
6261 C6
6262 C6
6263 C7
6264 F7
6265 D6
7240 A5
gnd_f
7241 B5
GND_M
7250 A2
7251 B2
7252 B3
7253 B3
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