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Service Manual

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  • Contains Circuit Diagrams
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  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of KENWOOD DMCG7R Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 12 (click to view)

Lead-in switch position adjusting method
Note: Measure the position of lead-in switch in the INNER mode, and fix the position of lead-in switch at SUBQ FF85 to FF02. After retightening the screw, pressing the mechanism PWB in the arrow direction, measure again the position of lead-in switch. If the removed screw cannot be fit after position adjustment, fix with two screws.

E2-PROM (IC402) writing procedure
1. Procedure to replace E2-PROM and write initial value of microcomputer in E2-PROM
(1) Replace E2-PROM. (2) Deprive E2-PROM of protection (connect the pins 8 and 2 of IC402). (3) Refer to the latest E2-PROM data list. (4) Press the Display/Lower-case Character button, Enter/Synchro button and Play/Pause button to start the test mode. (5) Version display [Ver. ] E2-PROM version (C ~ Z) Microcomputer ROM version (6) The whole LCD lights. (7) Test mode stop state [ TEST ] (8) Press the Enter/Synchro button. [ EEPROM ] (9) Perform the operation to display "E2-PROM SETTING MODE CHART", compare the E2-PROM DATA LIST with the display, and set according to the E2-PROM DATA LIST with the VOL UP or VOL DOWN key. (10) Set the temperature reference. (Refer to the Temperature Reference Setting Method.) (11) Set according to the E2-PROM DATA LIST. (12) Press the Stop button.

Lead In Switch Remove yhe screw when adjustment is made.

Mechanism PWB Loosen two screws Figure 16-1


Adjustment of magnetic head mounting position
⢠When the magnetic head and optical pickup have been replaced, be sure to adjust the mounting position. ⢠For easier adjustment of mounting position move the optical pickup to the center position, and then adjust the position. 1. Set the transparent disc 3 for adjustment.(*1) 2. Turn off the power supply, turn the head drive gear by hand to lower the head. 3. Viewing the set from above, make an adjustment so that the magnetic head aligns with the optical pickup objective lens. ⢠Circumferential direction: Slightly loosen the head fixing screw (A), and shift the magnetic head fitting to align the head with the pickup abjective lens. ⢠Radial direction:Turn the magnetic head circumferential adjustment nut (B), and adjust to align the head with the objective lens. *1: Before setting the disc remove the decoration plate from the disc lid, and fix it as shown in Figure 16-2. 4. Make sure that there is a clearance as shown in Figure 16-2 and that the magnetic head moves up and down smoothly. 5. After adjustment apply Screw Lock to the head fixing screw (A) and adjusted magnetic head radial adjusting screw (B).

Magnetic head

Radial Direction

Radial Direction

(Align the magnetic head Objective with the upper end of lens) lens Circumferential direction (Align the magnetic head approximately with the lens center) Clearance A B

[ TEST ] (13) Press the Stop button. (14) After data is written in E2-PROM, turn off power . (15) Restore protection of E2-PROM (Disconnect connection made in Step (2) above).

(A) Apply a screw lack for head fixing.

2. Temperature reference setting method (to be performed at room temperature 21 to 29°C)
Circumferential direction Magnetic head Slightly loosen the head fixing screw.

(1) Test mode stop state [TEST MODE ] (2) Measure voltage of TEMP terminal (pin 3, IC401) of microcomputer. (3) Calculate the temperature reference, using the following formula. Measured voltage x 256 Temperature reference = 2.8 (4) Round down decimal fractions of calculated temperature reference, and convert it to hexadecimal value. (5) Correct the temperature according to the table below depending on ambient temperature. Ambient temperature 21 - 23 24 - 26 27 - 29 Temperature correction +1 ±0 -1

Lift Motor The lift pin is moved in the arrow direction

An example: Environmental temperature is 22°C and set voltage is 1.25V.

Figure 16-2
QCNWK0089AFZZ (6 Pin) QCNWK0090AFZZ (7 Pin) Headdrive flexible PWB LCD Flexible PWB

CNS601 CNS401

CNS201 QCNWK0091AFZZ (13 Pin) CNS402 QCNWK0092AFZZ (14Pin) Flexible PWB Mechanism Flexible PWB

(6) (7) (8) (9) (10)

CNS101 QCNWK0093AFZZ (26 Pin)

1.25 x 256 2.8 = 114.286 = 114 (Decimal fraction is rounded down.) = 72 H (Conversion to hexadecimal value) Press the BASS button, and press the SKIP DOWN button. [ EEPROM ] Press the PLAY button, and press the SKIP button. [ Temp ] Press the PLAY button. [TEMP ] : Temperature reference Set the temperature standard value to the value obtained above with the VOL UP and VOL DOWN buttons. Press the STOP button. [ TEST ] Temperature reference =

Pickup Flexible PWB Main PWB Extension PWB for servicing RUNTK0400AFZZ

Figure 16-3

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