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SERVICE MANUAL
MODEL DN-T645/625
CD/CASSETTE COMBI-DECK
(This illustration shows the DN-T645 model.)
1 Some illustrations using in this service manual are slightly different from the actual set.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
Telephone: 03 (3837) 5321
X-0159 NC 0210
DN-T645/625 2
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to
chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either
side of the power cord is less than 460 kohms, the unit is defective.
2
DN-T645/625 3
DISASSEMBLY
(To reassemble, reverse disassembly)
1. TOP COVER
(1) Remove 6 screws on both sides, and 3 screws on the rear panel.
(2) Pull the Top Cover as shown by the arrow direction.
2. FRONT PANEL
(1) Turn the unit power on, and open Tray of the CD Mecha.
(2) Remove the Loader panel, and switch off the power after closing the Tray.
(3) Remove 2 screws at the top, and 3 screws at the bottom.
(4) Remove 2 screws to free Earth Wire.
(5) Remove the screw to free FFC.
(6) Cut the Clamp band.
(7) Disconnect 2 wire and 6 connectors from the Front Panel, then detach the Front Panel to the arrow direction about 50mm.
(8) Disconnect 2 connectors and the FFC from the Front Panel, then detach the Front Panel to the arrow direction.
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DN-T645/625 4
Method of opening the Tray when the power would not be turned on in trouble.
(1) Please be sure to unplug the cord.
(2) Push the lever indicated in the circled figure below with small bar like a pencil or a ball pointed pen, through the square
opening on the left side of the main chassis.
(3) Push the Tray out to the direction indicated in the figure below.
(4) Detach the Loader Panel by lifting up to the direction indicated bellow.
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DN-T645/625 5
3. DISPLAY & SW UNIT / KEY UNIT / SW UNIT / MIC UNIT /
H/P UNIT / VOLUME UNIT / POWER SW UNIT
(1) Pull out 6 knobs on the front.
(2) Remove 15 screws and 6 screws on the DISPLAY & KEY UNIT.
(3) Remove 2 screw on the MIC UNIT.
(4) Remove the screws on the SW UNIT.
(5) Remove 2 screws on the H/P UNIT & VOLUME UNIT.
(6) remove 2 screws on the POWER SW UNIT.
4. CASSETTE MECHA
(1) Press Eject button and unlock cassette Door.
(2) Remove 4 screws on the Cassette Mecha.
(3) Detach the Cassette Mecha.
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DN-T645/625 6
5. CASSETTE DOOR
(1) Take off the Cassette Window on the front.
(2) Remove the screw to detach the Mini-damper.
(3) Remove the screw to detach the Door Bracket.
(4) With pushing the shaft in the arrow directions, no spring side first, detach the Cassette Door.
6. CD MECHA
(1) Remove 2 screws, then detach the FRONT BRIDGE.
(2) Remove 4 screws.
(3) Pull out the CD Mecha in the arrow direction.
6
DN-T645/625 7
7. XLR UNIT / DECK AMP UNIT
(1) Disconnect the connectors from the DECK AMP UNIT.
(2) Disconnect the FFC and 2 connectors from the MAIN UNIT.
(3) Remove 12 screw, then detach the XLR UNIT to the arrow direction.
(4) Remove 3 screws, then detach the DECK AMP UNIT to the arrow direction.
8. MAIN UNIT / 25P DSUB UNIT
(1) Disconnect the connectors from the TRANS UNIT.
(2) Remove 8 screws.
(3) Remove 4 hexagon screws, then detach the MAIN UNIT and 25P DSUB UNIT to the arrow direction.
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DN-T645/625 8
9. TRANS UNIT
(1) Disconnect the power connector.
(2) Remove 4 screws, then detach the TRANS UNIT to the arrow direction.
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DN-T645/625 9
SERVICE PROGRAM
Required Measuring Implement
Reference disc (TCD784 or CO-74176)
1. What is Service Program
Service program is a special program intended for confirming servo functions etc.
2.