Kenwood DP-1100 B User Manual

COMPACT DISC PLAYER
NOTE: Please replace this service manual with the old DP-1100's manual (B51-1592-00). This manual
has all descriptions for DP-1100 and DP-110011.
Photo is DP-110011
'Refer to Parts List on page 191,
TRIO-KENWOOD Corp. certifies this
equipment conforms to DHHS Regula-
tions No. 21 CFR 1040.10, Chapter I,
Subchapter J.
DANGER: Laser radiation when open
and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM.
KENWOOD
DP-1100 B
DP-1100II
Photo is DP-1100B
•Refer to Parts List on page 177.

Kenwood DP-1100 B Specifications

Summary

II. FUNDAMENTALS

2 CODE ERROR

3-3 SERVO CIRCUIT

3-3-1 Focus Servo Circuit

Explains the focus servo's role in maintaining the laser spot on the disc surface.

3-3-2 Tracking Servo Circuit

Describes the tracking servo's function to follow the disc's signal track.

3-3-3 CLV Servo Circuit

Details the CLV servo's function in maintaining constant linear velocity.

4 SEMICONDUCTOR LASER (LASER DIODE)

5 PICK-UP (PU) AND PU SERVO

5-2 FOCUS ERROR AND TRACKING ERROR

Explains the detection methods for focus and tracking errors.

5-2-1 Focus Error Detection

Details focus error detection using critical angle prism and reflection ratio.

5-2-2 Tracking Error Detection

Explains tracking error detection using the heterodyne system.

1. CIRCUIT DESCRIPTION

1-1-1 Focus balance and SVC operation circuit (Q103)

1-1-2 Focus error signal generation circuit (Q101 and Q104)

1-1-3 SVC circuit operation (Q102)

1-1-4 APC (laser power control) circuit (Q105, Q106 and Q107)

1-2 Servo circuits

1-2-1 Focus servo circuit

Explains how the focus servo loop maintains focus on the disc.

1-2-2 Tracking servo circuit

Describes the tracking servo's function to follow the disc's signal track.

1-3-1 EFM signal demodulation

1-3-2 CLV servo control in IC8 (TC9178F)

1-5-1 RESET OPERATION

Explains the power-on and power-off reset sequence.

1-5-2 TRAY OPERATION

1-5-3 LASER ON OPERATION

1-5-4 FOCUS SEARCH OPERATION

Details the process of searching for the correct focus point.

1-5-5 DISC DETECTION OPERATION & REVERSE-REVOLUTION PREVENTION CIRCUIT FOR DISC MOTOR

Describes disc detection and prevention of reverse motor rotation.

1-5-6 FG & DISC MOTOR DRIVE AND STOP OPERATIONS

1-5-7 FOCUS SERVO OPERATION

Details the focus servo operation including feedback and compensation.

1-5-8 TRACKING SERVO OPERATION

Explains tracking servo operation, including error signal processing.

1-5-9 TRACKING ERROR GENERATION AND KICK OPERATION

Describes generation of tracking error and kick operation control.

1-5-10. SEARCH AND LOCK-IN CIRCUIT OPERATION DURING KICK MODE

1-5-11. PU DRIVE OPERATION

1-5-12. FOCUS SERVO CONTROL SIGNAL OPERATION

Explains control signals for focus servo operation.

1-5-14. SERVO CONTROL CIRCUIT OPERATION

1-5-15. DROPOUT DETECTION OPERATION AND PUFF, KICK OPERATION

Explains dropout detection and PUFF/KICK operations.

2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION

2-1-1 Q10 3 (TA7731P) head amp

2-2-2 IC15 (TC15G008AP) semi-custom IC

2-3-1 IC15 (TMP4740N-5909, 5914) Main microprocessor

Details the TMP4740N main microprocessor IC.

2-3-3 IC8 (TC9178F) E.F.M decoder Pin Description

2-3-4 IC6 (TC9179F) Error correction

2-3-5 IC12 (MB88201-115K) SVC microprocessor

Describes the MB88201 SVC microprocessor IC.

2-4-1 IC1 (TMP47C41N) display microprocessor

Details the TMP47C41N display microprocessor IC.

3. OPERATION OF MAIN MICROPROCESSOR

3-1 OPERATION OF CPU 1 (IC15)

3-1-1 Tray close operation

Describes the flowchart for closing the disc tray.

3-1-2 Disc presence/absence detection

Explains how disc presence is detected using DOK and FSRCH signals.

3-1-3 Disc surface/rear judgement

Describes the flowchart for judging disc surface/rear condition.

3-1-4 Lead-in data reading section

3-1-5 Address data (data Q, time data) reading

3-1-6 FF/REV mode

Explains fast forward/backward pickup operations.

3-1-7 Search operation

Details dynamic and kick search systems for locating music.

3-1-8 Pause operation

Explains the pause operation using the search system.

4. TROUBLESHOOTING

4-1 Checking flow chart of the start operation from the moment power is switched on until operation is enabled.

Flowchart for checking initial power-on and operation status.

4-2 FOCUS SERVO

Troubleshooting guide for focus servo issues.

4.3 TRACKING SERVO

Troubleshooting guide for tracking servo problems.

4-4. Pickup feed motor circuit

Troubleshooting steps for the pickup feed motor circuit.

4-5. DROPOUT CONTROL (DCON)

Troubleshooting for dropout control circuit, especially with scratched discs.

4-6. KICK CIRCUIT

Troubleshooting for kick circuit operations and related signals.

4-7. TRAY

Troubleshooting steps for tray mechanism issues.

4-8. AGC

4-9. SLICE LEVEL CONTROL

4-10. CLV (constant linear verocity)

Troubleshooting guide for CLV operation issues.

4-11. BIT SYNCHRONIZATION

Troubleshooting for bit synchronization problems.

4-12. SIGNAL PROCESSING

Troubleshooting for signal processing circuits.

4-13. D/ACONVERTER

Troubleshooting steps for D/A converter issues like distortion or no sound.

4-14. DISPLAY PCB

Troubleshooting for the display PCB and its components.

5. MECHANISM OPERATION

5-1-1 Pickup slide mechanism

(1) Operation

Explains how the pickup moves linearly via gears and rack.

5-1-2 Eject and loading mechanism

(1) Operation during power ON

Explains tray eject/load sequence when power is on.

5-1-3 Tray section mechanism

(1) Tray operation

Explains how the tray operates during disc loading and ejection.

5-2-1 Pickup slide mechanism

(1) Operation (See Fig. M1.)

5-2-2 Eject and loading mechanism

(1) Operation at power ON

5-2-3 Tray section mechanism

(2) Tray operation

5-3 REPLACEMENT AND REMOVAL OF MAIN COMPONENTS

Provides instructions for replacing major components.

5-3-1 Replacement of pickup (Figs. M20, M21 and M22)

Step-by-step guide for replacing the laser pickup assembly.

5-3-2 Replacement of disc motor on FG PCB

Instructions for replacing the disc motor and FG PCB.

5-3-3 Replacement of pickup carry motor in pickup slide mechanism section

Procedure for replacing the pickup carry motor.

5-3-4 Replacement of loading motor on loading gear group

Instructions for replacing the loading motor and gears.

5-3-7 Removal of head amplifier PCB

Procedure for removing the head amplifier PCB.

5-3-8 Replacement of clamper lever mount

Instructions for replacing the clamper lever mount.

5-3-5 Replacement of tray

Step-by-step guide for replacing the disc tray.

5-4 LUBRICANT APPLICATION POINTS

5-5 CLAMPER LEVER HEIGHT ADJUSTMENT

Details adjustment procedures for the clamper lever height.

5-6 WIRE CONNECTION AND BUNDLING