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SERVICE MANUAL
DOUBLE CASSETTE DECK
TD-W254BK
TD-W254
DOUBLE CASSETTE DECK
AUTO REVERSE
A
PLAYBACK
POWER
DOLBY B NR
B
OFF C
STANDBY / ON
ON
OFF
The transformer and the circuit board have already been changed
in issued model TD-W254BK (No.4363).
Please confirm this SCHEMATIC DIAGRAMS (No.4363BSCH) to the schematic diagram
and the circuit board.
Please refer to TD-W254BK (No.4363) for the content of the text.
Supplement
STANDBY
INPUT LEVEL
INPUT LEVEL
5
5
COUNTER RESET
COUNTER RESET
4
4
6
6
3
3
7
2
2
8
1
1
9
PLAY
PLAY
MIN
MIN
MAX
MAX
PHONES
REVERSE MODE
AUTO TAPE SELECTOR / CONTINUOUS PLAY
DOLBY B-C NR HX PRO
AUTO REVERSE
B
REC/PLAYBACK
A B SYNCHRO DUBBING
REC/REC MUTE PAUSE
NORM SPEED HIGH SPEED
Area suffix
J
C
EN
Northern Europe
U
Other Areas
TD-W254BK
U.S.A
Canada

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Table of Contents

   Related Manuals for JVC TD-W254BK

   Summary of Contents for JVC TD-W254BK

  • Page 1 The transformer and the circuit board have already been changed in issued model TD-W254BK (No.4363). Please confirm this SCHEMATIC DIAGRAMS (No.4363BSCH) to the schematic diagram and the circuit board. Please refer to TD-W254BK (No.4363) for the content of the text.
  • Page 2 TD-W254BK VICTOR COMPANY OF JAPAN, LIMITED PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200107 (No.4363B)
  • Page 3 TD-W254BK PB O PB OUT REC IN LINE OUT IC851 VOL.CONTROL LINE IN & DD RP IC835 DOLBY NR HEADPHONES VR601 Input Level PB IN PB IN DECK A J8601 PB HEAD AMP IC861 H.P.JACK IC811 IC818 PB SIGNAL Q1101...
  • Page 4 TD-W254BK < M E M O >...
  • Page 5 TD-W254BK Standard schematic diagrams Equalizer & headphone amp circuit Parts are safety assurance parts. When replacing those parts make sure to use the specified one. IC861 IC811 BA15218N AN6557F Recording signal C1106 R1110 J8601 Q8101 R1601 QNS0092-001 4.7/50 Indicator signal...
  • Page 6 TD-W254BK TD-W254BK Dolby circuit & power circuit QQR0879-001 R2261 5.6K C2360 R2265 5.6K L2351 4.7/25 C2261 0.0082 0.0068 IC825 C2265 R2251 QVP0004-203Z BA15218N BA15218N Q8351 R2254 C2252 D8351 C2355 C2266 R2262 R2266 4.7K C2262 0.0022 L2252 0.0047 6.8K 0.033 6.8K R2258 0.027...
  • Page 7 TD-W254BK Display & Mecha control circuit DN6851A DN6851A QGB1219J1-15S QGB1219J1-08S QGB1219J1-15S QGB1219J1-08S CN722 CN721 CN712 CN711 QGB1219K1-15S QGB1219K1-08S QGB1219K1-15S QGB1219K1-08S DI701 R718 D717 D716 D715 Q712 D718 R765 FW701 D709 D741 SLR-56VC-T12 POFF R783 R784 BMETAL Q710 Q708 R751 R742...
  • Page 8 TD-W254BK TD-W254BK Printed circuit boards Main board U ver. only Main board CN801 C2101 Z906 Z905 C2108 R8151 R2102 C1101 Q8163 C2107 R1102 C1107 IC816 C1102 R1101 PBLEVELADJ. C2102 C1108 R1109 R2109 IC861 R2101 R2602 C2153 C1153 R2604 C2151 C1151...
  • Page 9 TD-W254BK Sub board Key switch board for deck A R605 Head phone jack board R606 R608 R610 R609 Key switch for deck B CN614 R621 HS.DUB NS.DUB B.DIR B.REC R627 B.KEYSWPWB R628 B.PAUSE S629 S621 S622 S628 S626 S625 Standby indicator board...
  • Page 10: Parts List

    TD-W254BK PARTS LIST [ TD-W254BK ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix U.S.A Canada Northern Europe Other Areas - Contents - Electrical parts list (Block No.01~02)
  • Page 11 TD-W254BK Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area C 900 QCZ9105-472 CER.CAPACITOR 4700PF C1354 QENC1EM-475Z NP E.CAPA I.M 4.7MF 20% 25V C 901 QCF31HZ-103Z C CAPACITOR .010MF +80:-20%...
  • Page 12 TD-W254BK (Main board) Electrical parts list Block No. 01 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area C2501 QENC1EM-475Z NP E.CAPA I.M 4.7MF 20% 25V D8481 1SS133-T2 SI DIODE IM C2511 QETN1EM-106Z E CAPACITOR...
  • Page 13 TD-W254BK Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area Q8352 KRA103M-T TRANSISTOR * R1264 QRE141J-222Y C RESISTOR 2.2K 5% 1/4W Q8353 KRA103M-T TRANSISTOR * R1265 QRE141J-562Y C RESISTOR 5.6K 5% 1/4W...
  • Page 14 TD-W254BK Electrical parts list (Main board) Block No. 01 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area R2264 QRE141J-222Y C RESISTOR 2.2K 5% 1/4W R8485 QRE141J-471Y C RESISTOR 470 5% 1/4W R2265 QRE141J-562Y C RESISTOR 5.6K 5% 1/4W...
  • Page 15 TD-W254BK (Sub board) Electrical parts list Block No. 02 Item Parts number Parts name Remarks Area Item Remarks Parts number Parts name Area C 701 QETN1AM-107Z E CAPACITOR 100MF 20% 10V Q 743 2SA1175/HFE/-T TRANSISTOR C 702 QCBB1HK-471Y C CAPACITOR...
  • Page 16 TD-W254BK (Sub board) Electrical parts list Block No. 02 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area R 732 QRE141J-103Y C RESISTOR 10K 5% 1/4W VR702 QVP0077-203Z SEMI.V.RESISTOR A.HIGH SPEED AD R 733 QRE141J-182Y C RESISTOR 1.8K 5% 1/4W...

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