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MC-70
A02 - 155
Service
Service
Service Product Service Group CE Audio
Service Information
Already published Service Informations: A01-165 3139 785 30024
CHANGES DURING PRODUCTION 3DTC MODULE
FRONT CONTROL BOARD * From production wk205 onwards a new pc board pt. 5 is
introduced due to the addition of a HF detection circuitry
* From production wk204 onwards the following changes for other set application. Because the existing module
are made to improve brightness & reliability of the Blue has dedicated circuit diagram for this set, no changes is
LED. required on the circuit. Enclosed is the new pt.5 layout.
3601 change to 33R 5% 0,062W 4822 051 30339
3602 change to 33R 5% 0,062W 4822 051 30339 REGULATOR BOARD
ETF TAPE MODULE * From production wk212 onwards a new pc board pt. 4 to
improve MW/LW sensitivity & noise for other application
* From production wk209 onwards a new ETF8 SD Tape
sharing the pc board. Added on the board are compo-
Module was introduced replacing the existing ETF6-LE
nents 2417 and 2420.
Tape Module. Due to this change the undermentioned
The silkscreen printing on the pc board is later changed
changes needs to be implemented together:
to pt. 5 to correct item 3433 & 3434 interchange error.
The new pt.5 layout & circuitry is enclosed for reference.
On the Front Board
7102 is change to 9965 000 11077 TMP88PU74YF.
This is the OTP version of new IC which can be recog-
nized by the "MC50S52881" printed on the body of the IC.
On the Center Unit (Refer to Set Exploded view)
Pos 198 is change to 3139 114 73930 Door Cassette
A new Chapter of the ETF8 Tape Module is enclosed. It
can be recognized by the the printing mark
3139_113_34552_01 on the pc board.
2002 - 04 - 26 3139 785 30062
REGULATOR BOARD
REGULATOR CIRCUIT
1171 C2 7410 D7
1 2 3 4 5 6 7 8 9 1400 B9 7411 E6
1401 A1 7412 E7
1402 A1 7413 D3
1403 E1 7414 F3
2400 B5 7415 F3
+12V_M
2402 A7 7417 D5
+12V_A
+A 2403 C5 7419 F1
11.3V
9401 2404 C5 7420 E1
29V 11.3V
7403 2405 B7 7421 F2
A BDX53BFI A 2406 B8 9172 D2
2407 B8 9174 D2
EH-B 2408 D5 9401 A6
270R
3403
3405
EH-B 7405
1K
1401 1402 FOR NON-LPS VERSION ONLY 2409 E4 9404 D3
1 1 BD438
2402
2410 E5 9405 D4
47u
12.4V
330R
3419
3421
5R6
27.3V 27.9V 2411 C3 9406 E1
2 2 +12V_A GND_A LPC 2400
7402 2412 F3
2413 E3
3412
3413
3414
3 3 LPC 7401 11V
BC557B
1K
1K
1K
2405 BZX79-B10
2u2 GND_M GND_A 3411 7409
3407
BC327-25 2415 E7
15K
BC547B
4 4 +12V_M +A 2416 D8
470R 10.35V 2417 D6
6405
5 5 +A 5V 3406 6406
2420 E6
B 4.2V B 3403 A4
3420
6 6 BZX79-C3V9 6.34V
2322640
10u
1K 1400
3404
7407 3404 B4
3418
+5V6
2K2
9.91V
BZX79-C15
1K
t
5V6_GND
3410
7 7 3405 A4
10K
+A/2 BC547B 1
120R
3416
7408
6402
5.7V 3406 B5
2406
100u
2407
100u
8 8 BC547B
1N4148 1N4148
1.4V 2 3407 B5
6400
9 9 +5V6 3415 3409 C5
0.65V EH-B 3410 B6
7406
VCD_GND 68R
2411
10 5V_VCD 47u For Fan 3411 B8
1N4148
BC547B
120R
3409
3417
6401
6404
2403
2404
100n
VCD_GND
3K3
4u7
3412 B6
11 VCD_ON VCD_ON 3413 B6
3414 B6
C TO COMBI 14.5V
5V6_GND GND_A
C 3415 B7
3416 B7
3417 C7
T1A * T2A5 for CDR
3418 B8
3419 A8
1171 3420 B8
TO CDR MODULE +5V6 3421 A8
5V_VCD
3422 D3
3423 D2
3422
9405
9404
10K
6 3424 E2
9172
3430
7410 3425 E3
10K
~ ~
5 7417
3426 E3
1N4148
GND_M BD438
D D
6412
120R BZX79-B3V9
4 ~ 14.1V 5.7V
3427 E4
9174 1 3
3428 F4
6413
VCD_GND 3423
IN GND OUT
3430 D6
180R
180R
3431
3432
3
2416
47u
L7805 2 3431 D6
2408
100n
22K
3433
2 7413 0.7V 3432 D6
10K
5V_VCD
BDW94C 3433 D7
2417
3434
2415
1
3 2
10u
1N4148
3434 E7
6409
2409
2410
100n
10u
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