Disassembly Procedures - Harman Kardon HD7725 Technical Manual

harman/kardon
Compact Disc Player
Check — Cteae
22 INTRO button
This button puts your compact disc player in and out of INTRO
SCAN mode. When INTRO SCAN is on and you press PLAY,
the unit plays only the first 15 seconds of each track before
moving on to the next. Press the button once to turn on INTRO
SCAN mode; press again to turn it off and stop the scanning.
When the unit is in INTRO SCAN mode, the FUNCTION
indicator (5) will display the word INTRO.
23 SPACE button
This button puts you compact disc player in and out of SPACE
mode. Press the button once to tum on SPACE mode; press
again to tum it off. In SPACE made, the unit inserts 4 seconds
of blank space between tracks. This is particularly useful if you
are recording music from a compact disc onto a tape. Tape
decks with a Music Search feature will be able to use the 4
seconds of space to correctly identify the beginning of each
selection on the tape. When the unit is in SPACE made, the
FUNCTION indicator (5) will display the word SPACE.
24 INDEX buttons
Some discs contain long selections that may be subdivided into
shorter section (for example, operas). Just aS'the tracks are
marked by the track number, these shorter sections may be
marked by index numbers. When you have started playback of
the desired track, you can use the INDEX UP and INDEX
DOWN buttons to jump to a desired index selection. Each time
you press an INDEX button, the INDEX indicator displays the
next higher or lower index number. If you continue pressing the
button until the indicated index number is higher than the actual
number of index selections on the disc, playback will start from
the nearest index selection.
DISASSEMBLY PROCEDURES
[1] CABINET TOP (124) REMOVAL
Remove 7 screws (A) and then remove the Cabinet Top (124).
{2] FRONT PANEL ASSEMBLY (AA)REMOVAL
1. Remove the Cabinet Top (124), referring to the previous
step [1].
2. Disconnect the connector with lead wires (LCN901)} from
connector (CN910) on the motor P. C. Board (PCB-4). Also
Disconnect the connector with lead wires (JL401) from
connectors (CN201) on the Main P. C. Board (PCGB-1).
3. Remove lead wire (W401) from the Main P, C. Board (PCB-1).
4. Disconnect the wires (W-510 and W-511) from the chassis,
by removing two nuts (208 and 209).
5. Remove 6 screws (B) and then remove the Front Panei
Assembly (AA) with the Front P. C. Board (PCB-2) and the
Output Level & Jack P. C. Board (PCB-3).
6. Pull off output level Knob (134). Remove nut (D) and then
remove the Output Level and Jack P. C. Board (PCB-3) from
the Front Panel Assembly (AA).
7. Remove 9 screws (C) and then remove the Front P. C. Board
(PCB-2) from the Front Panel Assembly (AA).
[3] MAIN P. C. BOARD (PCB-1) REMOVAL
1. Remove the Cabinet Top (124), referring to the previous
step [1].
2. Disconnect the connector with lead wires (LCN113, LCN114,
LCN115 and LCN117) from connectors (CN113, CN114,
CN115 and CN117) on the Main P. C. Board (PCB-1).
3. Open the lid of connectors (CN501, CN502 and CN503) on
the Main P. C. Board (PCB-1), then disconnect the lead wires
(W501, W502 and W503). Also Open the lid of connectors
{CN1 and CN2) on the Main P. C. Board (PCB-1), then
disconnect the lead wires (JL1 and JL2).
4. Remove 3 screws from bracket (165) and then remove
bracket (165) from chassis.
5, Remove 11 screws (E), then remove the Main P. C.
Board (PCB-1).
[4] POWER SUPPLY P. C. BOARD (PCB-5) REMOVAL
1. Remove 6 screws (G) and four washers (212).
2. Disconnect lead wires (TM1 and TM2) on the Power Supply
P. C. Board (PCB-5).
3. Open the lid of connectors (CN1 and CN2) on the Main P. C.
Board (PCB-1), then disconnect the lead wires (JL1 and JL2).
4. Slide back the Power Supply P. C. Board (PCB-5) to
disconnect power switch shaft from the Front Panel Assembly
(AA) and remove.