SONY HCD-GTR6, HCD-GTR6B, HCD-GTR7, HCD-GTR8, HCD-GTR8B Service Manual

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

SERVICE MANUAL

Ver. 1.0 2009. 05

• HCD-GTR6/GTR7/GTR8 are the tuner, CD and ampliﬁ er section in MHC-GTR6/GTR7/GTR8

• HCD-GTR6B/GTR8B are the tuner, deck, CD and ampliﬁ er section in MHC-GTR6/GTR7/GTR8

CD

Section

Tape Deck Section

only for HCD-GTR6B/GTR8B

Photo : HCD-GTR8B (E Model)

Model Name Using Similar Mechanism NEW

CD Mechanism Type CDM74HF-DVBU101//M

Optical Pick-up Name KHM-313CAB/C2NP

Model Name Using Similar Mechanism HCD-GTX777/GTX787/GTX888

Tape Mechanism Type CFP42608

E Model

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

Australian Model

HCD-GTR6B/GTR8B

AUDIO POWER SPECIFICATION

Ampliﬁ er section MHC-GTR8 (HCD-GTR8/HCD-GTR8B)

The following are measured at Mexican model: AC 127 V, 60 Hz Other models: AC 120, 220, 240 V, 50/60 Hz

Front/Surround speaker Power Output (rated): 210 W + 210 W (at 6 Ω, 1 kHz, 1% THD, at LINK MODE)

Front speaker RMS output power (reference): 280 W + 280 W (per channel at 8 Ω, 1 kHz, 10% THD)

Surround speaker RMS output power (reference): 110 W + 110 W (per channel at 24 Ω, 1 kHz, 10% THD)

Subwoofer RMS output power (reference): 160 W + 160 W (per channel at 6 Ω, 100 Hz, 10% THD)

SPECIFICATIONS

MHC-GTR7 (HCD-GTR7)

The following are measured at Mexican model: AC 127 V, 60 Hz Other models: AC 120, 220, 240 V, 50/60 Hz

Front/Surround speaker Power Output (rated): 215 W + 215 W (at 6 Ω, 1 kHz, 1% THD, at LINK MODE)

Front speaker RMS output power (reference): 285 W + 285 W (per channel at 8 Ω, 1 kHz, 10% THD) Surround speaker RMS output power (reference): 110 W + 110 W (per channel at 24 Ω, 1 kHz, 10% THD) Subwoofer RMS output power (reference): 210 W (at 8 Ω, 100 Hz, 10% THD)

– Continued on next page –

COMPACT DISC DECK RECEIVER

9-890-515-01

2009E08-1

Sony Corporation

Audio & Video Business Group

Published by Sony EMCS (Malaysia) PG Tec

1

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

MHC-GTR6 (HCD-GTR6/HCD-GTR6B)

The following are measured at AC 120, 220, 240 V, 50/60 Hz

Front/Surround speaker Power Output (rated): 200 W + 200 W (at 4 Ω, 1 kHz, 1% THD, at LINK MODE)

Front speaker RMS output power (reference): 225 W + 225 W (per channel at 8 Ω, 1 kHz, 10% THD)

Surround speaker RMS output power (reference): 225 W + 225 W (per channel at 8 Ω, 1 kHz, 10% THD)

Inputs VIDEO (AUDIO IN) L/R: Voltage 250 mV, impedance 47 kilohms PC IN L/R: Voltage 700 mV, impedance 47 kilohms MIC: Sensitivity 1 mV, impedance 10 kilohms

(USB) port: Type A

Outputs PHONES: Accepts headphones of 8 Ω or more

Disc player section

System Compact disc and digital audio system Laser Diode Properties Emission Duration: Continuous Laser Output*: Less than 44.6 µW * This output is the value measurement at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Frequency response 20 Hz – 20 kHz Signal-to-noise ratio More than 90 dB Dynamic range More than 88 dB

Tape deck section (Except for Latin American and Mexican models)

Recording system 4-track 2-channel stereo

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range North American models:

87.5 – 108.0 MHz (100 kHz step) Other models: 87.5 – 108.0 MHz (50 kHz step) Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range Pan-American and Oceanian models: 530 – 1,710 kHz (with the interval set at 10 kHz) 531 – 1,710 kHz (with the interval set at 9 kHz) Other models: 530 – 1,610 kHz (with the interval set at 10 kHz) 531 – 1,602 kHz (with the interval set at 9 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

USB section

Supported bit rate MP3 (MPEG 1 Audio Layer 3): 32 – 320 kbps, VBR WMA: 48 – 192 kbps AAC: 48 – 320 kbps Sampling frequencies MP3 (MPEG 1 Audio Layer 3): 32/44.1/48 kHz WMA: 44.1 kHz AAC: 44.1 kHz Transfer speed Full-Speed Supported USB device Mass Storage Class Maximum current 500 mA

General

Power requirements Mexican model: 127 V AC, 60 Hz Australian model: 230 – 240 V AC, 50/60 Hz Argentina model: 220 V AC, 50/60 Hz Other models: 120 V, 220 V or 230 – 240 V AC, 50/60 Hz, adjustable with voltage selector

Power consumption MHC-GTR8: 460 W MHC-GTR7: 440 W MHC-GTR6: 300 W

Dimensions (w/h/d) (Approx.) HCD-GTR8/HCD-GTR8B/ HCD-GTR7/ HCD-GTR6/HCD-GTR6B: 295x380x457mm

Mass (Approx.) HCD-GTR8B: 16.5 kg HCD-GTR8/HCD-GTR7: 15.8 kg HCD-GTR6B: 14.5 kg HCD-GTR6: 13.8 kg

Design and speciﬁ cations are subject to change without notice.

• Standby power consumption: 0.5 W

• Halogenated ﬂ ame retardants are not used in the certain printed wiring boards.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

2

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

Notes on Chip Component Replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270°C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than

ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C.

Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to ﬂ ow) than

ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also

be added to ordinary solder.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reﬂ ective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is claassiﬁ ed as a CLASS 1 LASER product. This label is located on the rear exterior.

CAUTION

Use of controls or adjustments or performance of procedures other than those speciﬁ ed herein may result in hazardous radiation exposure.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The ﬂ exible board is easily damaged and should be handled with care.

3

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

MODEL IDENTIFICATION

– MODEL NUMBER LABEL –

MODEL Parts No

GTR8B: E3

GTR8: E2/E51

GTR8: AR

GTR8B: AUS

GTR8: MX

GTR7: E2/E51

GTR7: AR

GTR7: MX

GTR6B: E3

GTR6: E2/E51

GTR6B: AR

GTR6B: AUS

4-126-681-0s

4-126-681-1s

4-126-681-3s

4-126-681-5s

4-126-681-6s

4-135-808-1s

4-135-808-3s

4-135-808-4s

4-135-809-0s

4-135-809-1s

4-135-809-3s

4-135-809-4s

• Abbreviation E2 : 120V AC area in E model E3 : 240V AC area in E model E51 : Chilean and Peruvian model AR : Argentina model AUS : Australian model MX : Mexican model

PART NO

4

DISASSEMBLY

Note : This set can be disassembled in the order shown below.

SET

1-1. CASE (TOP) (Page 7)

1-2. TAPE MECHANISM DECK (Page 7)

1-8. SUBTRANS BOARD (Page 10)

1-3. LOADING PANEL (Page 8)

1-4. FRONT PANEL SECTION (Page 8)

1-5. MIC BOARD, USB BOARD MICRV BOARD, HEADPHONE BOARD (Page 9)

1-9. DC FAN, POWER TRANSFORMER (Page 11)

1-10. MAIN BOARD, FRONT BOARD SECTION (Page 11)

1-16. OPTICAL PICK-UP (Page 14)

1-17. SENSOR BOARD (Page 15)

1-18. MOTOR(TB) BOARD (Page 15)

1-19. MOTOR(LD) BOARD (Page 16)

1-6. DISPLAY BOARD, STR BOARD, CD SW BOARD (Page 9)

1-7. TUNER PACK (Page 10)

1-15. DRIVER MT BOARD, SW MT BOARD (Page 14)

1-11. FRONT BOARD, GTH SUBWOOFER BOARD (Page 12)

1-12. BACK PANEL SECTION, DC FAN (Page 12)

1-13. CD BLOCK SECTION (Page 13)

6

1-14. DMB-19 BOARD, GTH HUB BOARD (Page 13)

Note : Follow the disassembly procedure in the numerical order given.

1-1. CASE (TOP)

(TC CASE TOP only for

HCD-GTR6B/ GTR8B)

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

one screw



(case 3 TP2)



two screws

(case 3 TP2)



(+BVTP 3 x 8)



panel (side-L)

two screws



CN020 (8P)

RK

RH



CN020 (8P)



a



wire (flat type) (9 core)

RG

(CN040)

a

b

RT



wire (flat type) (9 core)

RE

(CN040)

RB

two screws

(+BVTP 3 x 8)

RI

case (top)





panel (side-R)

two screws



(+BVTP 3 x 8)

one screw



(case 3 TP2)

1-2. TAPE MECHANISM DECK (only for HCD-GTR6B/GTR8B)

(TC CASE TOP only for

HCD-GTR6B/ GTR8B)

tape mechanism deck





SHIELD PLATE (TOP)

(GTR6B/GTR8B)



one screw

(+BVTP 2.6 (3CR))



four screws

(+BVTP 2.6 (3CR))



two screws

(case 3 TP2)



one screw

(+BVTP 2.6 (3CR))



(GTR6B/GTR8B)

SHIELD PLATE (TCM)



one screw

(+BVTP 2.6 (3CR))

7

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-3. LOADING PANEL



loading panel

CD mechanism deck (CDM74KF)



Turn the gear to the direction of the arrow.

chassis side

gear



Pull-out the disc tray.

1-4. FRONT PANEL SECTION



front panel section

wire (flat type) (11 core)



(CN151)

wire (flat type) (23 core)



(CN150)



CN1501 (10P)



CN400 (13P)

By using (-) screw driver





two screws

(+BVTP 3 x 8)



four screws

(+BVTP 3 x 8)

8

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-5. MIC BOARD, USB BOARD, MICRV BOARD, HEADPHONE BOARD



USB board

six screws



GROUND PLATE

(USB)



(+BVTP 2.6 (3CR))

one screw

(+BVTP 2.6 (3CR))



Headphone board

two screws



(+BVTP 2.6 (3CR))

Shield Plate (MIC)





MIC board

one screws



(+BVTP 2.6 (3CR))

RB

MICRV board

two screws



(+BVTP 2.6 (3CR))

R

knob (MIC)

1-6. DISPLAY BOARD, STR BOARD, CD SW BOARD



three screws

(+BVTP 2.6 (3CR))





four screws

(+BVTP 2.6 (3CR))



Display board



wire (flat type) (23 core)

(CN902)

meter display assy





holder (jog)



nut



knob (volume)

knob jog assy

R

gear (encoder)

RE

RT

CN903 (6P)

RH

CN901 (2P)

RI

CD SW board

RB

six screws

(+BVTP 2.6 (3CR))

STR board

RG

two screws

(+BVTP 2.6 (3CR))

9

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-7. TUNER PACK



wire (flat type) (5 core)

(CN1)



tuner pack

two screws



(+BVTT 3 x 8)

1-8. SUBTRANS BOARD



CN1200 (2P)



CN1201 (4P), CN1202 (2P)



SUBTRANS board





two screws

(+BVTP 3 x 8)

CN1203 (4P)



Bracket (Subtrans)

two screws



(+BVTP 3 x 8)

10

1-9. DC FAN, POWER TRANSFORMER (PT1250)

four screws



(+BVTT 4 x 8)



TRANS board



CN1250 (13P)



power transformer (PT1250)



CN320 (3P)

two screws



(+BVTP 3 x 8)

Fan, DC





Bracket Fan

two screws



(+BVTP 3 x 10)

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-10. MAIN BOARD, FRONT BOARD SECTION



CN820 (3P)

wire (flat type) (13 core)

(CN110)

RT



Front board section

four screws



(+BVTP 3 x 8)



CN1303 (16P)



CN801 (7P)



CN1302 (11P)

RB

wire (flat type) (23 core)

(CN500)

RG

Main board

four screws

R

(+BVTP 3 x 8)

one screw



(+BVTP 3 x 8)

four screws



(+BVTP 3 x 8)

one screw



(+BVTP 3 x 8)

CN090 (9P)

RE

11

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-11. FRONT BOARD, SUBWOOFER BOARD

two screws



(+BVTP 3 x 8)



Front board

R

heat sink assy

two screws



(+BVTP 3 x 8)



Bracket (PWB)



Bracket (PC)

one screw



(+BVTP 3 x 8)

RG

SUBWOOFER board

one screw

RE

(+BVTP 3 x 8)





Bracket (PWB)



RT

two screws

(transistor)

two screws

(+BVTP 3 x 8)

two screws

RB

(transistor)

one screw

(+BVTP 3 x 8)

1-12. BACK PANEL SECTION, DC FAN



back panel section



DC fan

two screw



(+BVTP 3 x 8)

four screws



(+BVTP 3 x 8)

two screw



(+BVTP 3 x 10)

two screw



(+BVTP 3 x 10)



Cover (fan)



DC fan

12

1-13. CD BLOCK SECTION

Cover Dust CDM Assy

two screws

RB

(+BVTP 3 x 8)

CD block section



Bracket (CDM Support)



three screws



(+BVTP 3 x 8)

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

Bracket (TRANS)



two screws



(+BVTP 3 x 8)

Cover Dust (Bottom)

two screws

R

(+BVTP 3 x 8)

1-14. DMB19 BOARD, GTH HUB BOARD



CN201 (6P)



wire (flat type) (24 core)

(CN101)



DMB19

board



wire (flat type) (9 core)

(CN1106)



Bracket (MTK-CD)

three screws



(+BVTP 3 x 8)



(+BVTP 3 x 8)

four screws

two screws



(+BVTP 3 x 8)



Bracket (CDM Support)



one screw



(+BVTP 2.6 x 8)

one screw

(+BVTP 3 x 8)

R

two screws

(+BVTP 3 x 8)

RB

wire (flat type) (7 core)

(CN1556)

RT

GTH HUB



one screw

(+BVTP 3 x 8)



Bracket (USB HUB)

board

Sheet Dust (BU)

13

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-15. DRIVER MT BOARD, SW MT BOARD



DRIVER MT board



CN704 (2P)



wire (flat type) (5 core)

(CN702)



two screws

(+BVTT (M2.6))



CN703 (4P)

one screw



(+BVTT (M2.6))



SW MT board

1-16. OPTICAL PICK-UP

 floating (+PTPWH M2.6)



insulator



insulator screw

screw

 CD

assy



insulator



insulator screw



insulator



insulator screw



optical pick-up

(KHM-313CAB/C2NP)



insulator



insulator screw

14

1-17. SENSOR BOARD



t

ray



floating

(+PTPWH M2.6)



floating

(+PTPWH M2.6)



screw

g

ear (geneva)



one screw

(+BTTP (M2.6))

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B



b

elt (table)



SENSOR board



floating

screw

p

ulley (table)



(+PTPWH M2.6)



CN731 (3P)

1-18. MOTOR (TB) BOARD

table



stopper





Remove the two solderings of motor.





two screws

(+BTTP (M2.6))

stopper





t

able motor assy (M741)



wire (flat type) (5 core)

(CN742)

MOTOR (TB) board

15

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

1-19. MOTOR (LD) BOARD



Remove the two solderings of motor.



l

oading motor assy (M751)



two screws

(+BTTP (M2.6))



MOTOR (LD) board



b

elt (loading)

16

SECTION 2

TEST MODE

[GC TEST MODE]

• This mode is used to check the ﬂ uorescent indicator tube, LEDs,

keys, VOLUME jog, OPERATION DIAL jog, model, destination and software version.

Procedure:

1. Press [x] button, [ENTER] button and [DISC 2] button si-

multaneously.

2. All LEDs and segments in ﬂ uorescent indicator tube are light-

ed up. All LEDs are lighted up in red color except for [ LED where the LED is lighted up in red and blue color,

[ A] LED in blue color and SUBWOOFER ON/OFF in

green color.

3. When you want to enter to the model version and destination

display mode, press [DISC 1] button. The model information appears on the ﬂ uorescent indicator tube.

4. Each time [DISC 1] button is pressed, the display changes to

display software version and date of the software creation. The sequence is model destination, SC, MDK, GC, SYS, CD, CDMA, CDMB, ST, TC, TA, TM and MTR in this order, and returns to the model destination display.

5. Press [DISC 2] button, the key check mode is activated.

6. In the key check mode, the ﬂ uorescent indicator tube displays

“K 0 J0 V0”.

Turn the [OPERATIONAL DIAL] clockwise; ”J” value in-

creases by one. Turn the [OPERATIONAL DIAL] counterclockwise; “J” value decreases by one. Each time a button is pressed, “K” value increases. Press other keys on main unit to check whether the key is detected. However, once a button has been pressed, it is no longer taken into account.

“V” value increases in the manner of 0,1, 2, 3 ... if [VOLUME]

kno b is t urned clo ckwise, or it decrea ses in the manne r of 0 , 9, 8, 7 ... if [VOLUME] knob is turned counterclockwise.

7. When [DISC SKIP/EX-CHANGE] button is pressed after

all LEDs and segments in ﬂ uorescent indicator tube light up, alternate segments in ﬂ uorescent indicator tube and LED would light up. If you press [DISC SKIP/EX-CHANGE] button again, another half of alternate segments in ﬂ uorescent indicator tube and LED would light up. Press [DISC SKIP/ EX-CHANGE] button again would cause all segments will lights off and press [DISC SKIP/EX-CHANGE] button again all segments will lights up.

8. To release from this mode, press three buttons in the same

manner as step 1, or disconnect the power cord.

B]

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

4. When the [VOLUME] knob is tur ned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears on the ﬂ uorescent indicator tube.

5. When the [VOLUME] knob is tur ned counterclockwise even slightly, the sound volume decreases to its minimum and a message “VOLUME MIN” appears on the ﬂ uorescent indica- tor tube.

• Tape function (only for HCD-GTR6B/GTR8B)

1. Inserted a tape in deck. The function is changed to VIDEO automatically when the recording is started by pressing [REC TO TAPE] then press [ENTER] button. During recording the ALC (Automatic Logic Control) is turned on.

2. During recording, press ALBUM - will stop the recording and the function is changed to TAPE and rewind the tape in Deck until the recording star t position and playback of the tape in Deck is started.

• To release from MC Test mode

1. To release from this mode, press [POWER] button.

2. The cold reset is enforced at the same time.

[COLD RESET]

• The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1. Press [x] button, [ENTER] button, and [POWER] button simultaneously.

2. The ﬂ uorescent indicator tube becomes blank for a while, and the set is reset.

[VACS ON/OFF]

• This mode is used to switch ON and OFF the VACS (Variable

Attenuation Control System).

Procedure:

1. Press [POWER] button to turn the set ON.

2. Press [x] button and [OPTIONS] button simultaneously. The message “VACS OFF” or “VACS ON” appears on the ﬂ uores- cent indicator tube.

[MC TEST MODE]

• This mode is used to check operations of the respective sections of Ampliﬁ er and Tape.

Procedure:

• To enter MC Test Mode

1. Press [x] button, [ENTER] button and [DISC 3] button si-

multaneously.

2. The CD number indicators ﬂ ash on the ﬂ uorescent indicator

tube. The function is changed to VIDEO.

• Check of Ampliﬁ er

1. Press [EQ BAND] button repeatedly until a message “GEQ

MAX” appears on the ﬂ uorescent indicator tube. GEQ in- creases to its maximum.

2. Press [EQ BAND] button repeatedly until a message “GEQ

MIN” appears on the ﬂ uorescent indicator tube. GEQ de- creases to its minimum.

3. Press [EQ BAND] button repeatedly until a message “GEQ

FLAT” appears on the ﬂ uorescent indicator tube. GEQ is set to ﬂ at.

[TUNER STEP CHANGE]

• The step interval of AM channels can be toggled between 9 KHz and 10 KHz. This mode is not available for Saudi Arabian models.

Procedure:

1. Press [POWER] button to turn the set ON.

2. Press [TUNER/BAND] / [TU NER AM] button to select the

“A M”.

3. Press [POWER] button to turn the set OFF.

4. Press [ENTER] button and [POWER] button simultaneously.

The system will turn ON automatically. The message “AM 9K STEP” or “AM 10K STEP” appears on the ﬂ uorescent in- dicator tube and thus the channel step is changed.

17

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

[CD SHIP MODE (WITH MEMORY CLEAR)]

• This mode moves the optical pick-up to the position durable to vibration and clears all data including preset data stored in the RAM to initial conditions. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press [POWER] button to turn the set ON.

2. Select CD function and waiting until CD no disc conﬁ rm.

3. Press [x] button, [SOUND FLASH] button and [POWER]

button simultaneously. The set will power off automatically.

4. After the “STANDBY” blinking display ﬁ nishes, a message

“MECHA LOCK” is displayed on the ﬂ uorescent indicator

tube and the CD ship mode is set.

5. Then AC power OFF.

[CD SHIP MODE (WITHOUT MEMORY CLEAR)]

• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press [POWER] button to turn the set ON.

2. Select CD function.

3. Press [CD] button and [POWER] button simultaneously. The

set will power off automatically.

4. After the “STANDBY” blinking display ﬁ n i s h e s , a m e s s a g e

“MECHA LOCK” is displayed on the ﬂ uorescent indicator

tube and the CD ship mode is set.

5. The AC power OFF.

3. The VACS Level Display, the ﬂ uorescent indicator tube dis- plays “VATB F APC”. “V” represent VACS , A represent VACS level which is triggered by signal level, “T” represent Thermal VACS NEO, B represent VACS level which is triggered by temperature, “F” represent FAN is triggered by software to turn in to high speed, “AP” represent APVACS (Abuse Protection VACS) and “C” represent APVACS level which is triggered.

[METER AGING TEST MODE]

• This mode use in factory to perform the non-stop aging mode for

meter device.

Procedure:

1. Press [POWER] button to turn on the system.

2. Press [EQ BAND/MEMORY] button and [METER MODE] button simultaneously.

[ERROR MESSAGE]

1. METER ERROR CODE CHECK

• This mode is used to check the number of trigger for Meter Pointer

to initial switch and end switch. The switches will trigger during meter initialize in AC supply on condition.

Procedure:

1. Press [POWER] button to turn on the system.

2. Press [x] button, [EQ BAND/MEMORY] button and [METER MODE] button simultaneously.

[CD TRAY LOCK MODE / DISC THEFT PREVENTION]

• This mode let you lock the disc tray. When this mode is activated, the disc tray will not open when [OPEN/CLOSE] button or [EXCHANGE] button is pressed. The message “LOCKED” will be displayed on the ﬂ uorescent indicator tube.

Procedure:

1. Press [POWER] button to turn the set ON.

2. Select CD function.

3. Press [x] button and [OPEN/CLOSE] button simultaneously

and hold down until “LOCKED” or “UNLOCKED” displayed on the ﬂ uorescent indicator tube (around 5 seconds).

[TCM OFFLINE MODE] (only for HCD-GTR6B/GTR8B)

• This mode prevents set from power off automatically when TCM is not connected. Therefore, measurements can be done even when TCM is not connected.

Procedure:

1. When the system in turned off, press [EQ BAND/MEMORY]

button, [STOP] button and [POWER] button simultaneously. The set will power on automatically.

2. The message “TCM OFFLINE” will be displayed on the ﬂ uo-

rescent indicator tube.

The Meter Er ror Code will appear on the ﬂ uorescent indicator tube displays

• Display

Display on ﬂ uorescent indicator tube,

IxxxxxMyyyyy

Ixxxxx = total number of Initial Switch touch by Meter

pointer. The Initial Switch will touch twice during meter initialized process.

Myyyyy = total number of End Switch touch by Meter

pointer. The End Switch will touch one times during meter initialized process.

[VACS DISPLAY]

• This mode is used to check the VACS level.

Procedure:

1. Press [POWER] button to turn on the system.

2. Press [x] button, [SOUND FLASH] button and [DISC SKIP/

EX-CHANGE] button simultaneously.

18

SECTION 3

MECHANICAL ADJUSTMENTS

(only for HCD-GTR6B/GTR8B) Precaution

1. Clean the following parts with a denatured alcohol-moistened swab:

record/playback heads pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Mode Torque meter Meter reading

2.9m N • m to 6.9m N • m

FWD CQ-102C 30 to 70 g • cm

(0.42 – 0.97 oz • inch)

FWD 0.15m N • m to 0.59m N • m

back tension CQ-102C 2 to 6 g • cm

(0.03 – 0.08 oz • inch)

2.9m N • m to 6.9m N • m

REV CQ-102RC 30 to 70 g • cm

(0.42 – 0.97 oz • inch)

0.15m N • m to 0.59m N • m REV

CQ-102RC 2 to 6 g • cm

back tension

4.8m N • m to 16.7m N • m

FF/REW CQ-201B 49 to 170 g • cm

(0.68 – 2.36 oz • inch)

(0.03 – 0.08 oz • inch)

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

19

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

SECTION 4

ELECTRICAL ADJUSTMENTS

TUNER SECTION 0 dB = 1 µV

[FM Tune Level Check]

FM signal generator

SET

Procedure:

1. Turn the power on.

2. Input the following signal from Signal Generator to FM antenna input directly.

* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHz Deviation : 75 kHz Modulation : 1 kHz ANT input : 35 dBu (EMF)

Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You

cannot use video cable for checking.

Please use SG whose output impedance is 75 ohm.

3. Set to FM tuner function and tune A, B and C signals.

4. Conﬁ rm “TUNED” is lit on the display for A, B and C sig- nals.

The mark of “TUNED” means “The selected station signal is received in good condition.”

OUT (75 7)

DECK SECTION 0 dB = 0.775 V

(only for HCD-GTR6B/GTR8B)

1. Demagnetize the record/playback head with a head demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the parts adjust.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

7. Switches and controls should be set as follows unless otherwise speciﬁ ed.

• Test Tape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

[RECORD/PLAYBACK HEAD AZIMUTH ADJUST-MENT]

Note: Perform this adjustments for Single deck

Procedure:

1. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

(L-CH & R-CH)

set

level meter

+

–

2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.

output level

within 1dB

L-CH peak

R-CH peak

within 1dB

screw position

L-CH peak

screw position

R-CH peak

20

3. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

L-CH

R-CH

oscilloscope

L

R

waveform of oscilloscope

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

H

V

in phase

45o 90o 135o 180o

good

wrong

4. After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location: Playback Head (Deck).

Reverse Rorward

21

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

SECTION 5

DIAGRAMS

5-1. BLOCK DIAGRAM — USB SECTION —

A

1

4

USB_DP

USB_DM

VBUS_B

D- B

D+ B

GND

RF/SERVO

SECTION

(Page 23)

CN1000

(USB)

31

30

3

4

USBUP_DP

USBUP_DM

USBDN2_DM

USBDN2_DP

IC1501

USB CONTROLLER

CN1001

(USB)

Signal Path

XTAL2

RESET_N

VBUS_DET

33

X1500

24MHz

32

26 21

27

SYSTEM CONTROL

USB_HUB_RESET

22

HUB_VBUS_DET

18

USB-OC1

USB-OC2

19

IC500 (4/6)

VBUS_A

1

D- A

D+ A

GND

4

IC1500

: USB

SINGLE-SUPPLY

DUAL COMPARATOR

+IN2

5

+IN1

3

VCC

OUT1

OUT2

M+9V

8

1

7

1

2

13

17

USBDN1_DM

USBDN1_DP

OSC1_N

OSC2_N

XTAL1/CLKIN

22

23 23

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

5-2. BLOCK DIAGRAM — RF/SERVO SECTION —

DETECTOR

125

2 3 4 5

19

18

RFIP OPOUT

RF_C RF_B

RF_A RF_D

RF_E

RF_F

LD01

MDI2

LD02

MSW

MDI1

CD RF AMP,

FOCUS/TRACKING ERROR AMP

CD SYSTEM PROCESSOR

DIGITAL SERVO PROCESSOR

IC101

OPTICAL PICK-UP

BLOCK

(KHM-313CAB)

2AXIS DEVICE FOCUS/

TRACKING

COIL

17

16

18

15

36 48

43

12

9

37 1

Q102 (2/2)

AUTOMATIC POWER

CONTROL (FOR DVD)

Q102 (1/2) AUTOMATIC POWER CONTROL (FOR CD)

LASER

DIODE

(FOR CD)

LASER

DIODE

(FOR DVD)

FOCUS COIL

DRIVE

42 41

BUFFER

35 3 34 4

TRACKING COIL

DRIVE

32 31

21

25

20

24

13

SLED MOTOR

DRIVE

FOCUS/TRACKING COIL DRIVER,

SPINDLE, SLED MOTOR DRIVER

IC201

27 28

SPINDLE MOTOR

DRIVE

MM

M1

(SPINDLE)

S1

(LIMIT)

46 47

FMO FOO DMO TRO

VREFO

127

IOPMON

FOO

RF

A B C

D

E+H

E+G

CD LD

VC

PD

VR650

VR780

DVD LD

FCS+

MSW

FCS–

TRK+

REG02

REG01

TRK–

SP+ SP–

SL+

SL–

NC NC

VREFO

V2O

12

30 29

SLED MOTOR

DRIVE

MM

M2

(SLED)

23

BUFFER

21

20 22

45

19

42

40

SYSTEM

CONTROLLER

IC500 (1/6)

64M RAM

IC104

91

TXD

40

IFSCK

MTK_CLK

33

TXD

CN105

RXD

RFMON

89

RXD

43

PRST

37

DF_D0

38

SF_CL

39

SF_CK

36

SF_CS

MTK-RESET

23

88

IFCS MTK_XIFCS

24

35

IFSDI

87

IFBSY MTK_BUSY

25

MTK SIO

47

78

BA0

20

80

BA1

21

55

DQSM

LDQM

15

75

RWE

WE

16

76

CAS0

CAS

17

77

RAS0

RAS

18

66

RCLK

CLK

38

65

DQM1

UDQM

39

TRO

10 13

FMO

IOP

IOPMON

DMO

107

MUTE123

22

MUTE4

94

GP1O

128

SPFG

MUTE123

MUTE TSD M

SPFG

108

LIMSW

Q101

Q103

7

6

(FOR TEST)

1

2

6

• Signal Path

: CD PLAY

: REC

126

41

IFSOD

MTK_SOD

48

FLASH

MEMORY

IC102

1.2V REG

IC 111

1.2V REG

IC107

SI

2

SCK

5

CS

6

SO

1

STEREO

CONVERTER

A/D

IC4601

114

GPIO

GPIO19

SCKI

6

119

LRCK

7

115

GPIO

120

BCK

8

106

DOUT

VINL

9

CONVERTER

D/A

IC4602

MCLK

AOUT-L

AOUT-R

4

LRCK

3

SCLK

2

SDATA

1

13

L IN

8

LOUT

5

ROUT

67 69

I

81

I

83 85

RA0

USB_DP

27

USB_DM

USB_DP

USB_DM

28

74

I

RA11

45

I

RD0

49 51

I

53

56

I

59

61

I

64

I

RD15

A0

I

A3,

A10

A4

I

A9,

A11

22

I

26

29

I

35

QG0, DQ1

I

DQ15

2,4,5,7,8,10,11,13,42,

45,47,48,50,51,53,55

R-CH is omitted due to same as L-CH.

DVDD3.3V

DVDD5V

86

J

MAIN

SECTION

(Page 25)

B

MAIN

SECTION

(Page 25)

A

USB

SECTION

(Page 22)

2424

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

5-3. BLOCK DIAGRAM — TAPE/TUNER SECTION —

ST-L

MAIN

REC-OUT-L

MAIN

TAPE

MECHANISM

BLOCK

ST-R

TU901

FM/AM TUNER UNIT

ANTENNA

GTR6B/8B

ST-L

FM ANT

AM ANT

ST-R

ST-DIN

ST-DOUT

ST-CLK

ST-CE

FM 75

COAXIAL

CAP M+

BTRGM+

BHALF

B SHUT

CAPM-+

B-HALF

B-SHUT

REC BIAS

REC-MUTE

AM

ST-DIN/UC-OUT

ST-DOUT/UC-DIN

ST-CLK

ST-CE

72

75

46 3

80

81

78

E-1

40

E-2

42

E-3

43

65

60

63

TUNED

ST-TUNED

58

61

SYSTEM CONTROL

(TAPE MECHANISM CONTROL)

IC500 (2/6)

TAPE_PB-L

C

MAIN

DECK

BIAS OSC

Q300

REC

MUTE

OP-AMP

R-CH

Q456

IC451

REC EQ

IC450

Q406

Q402, Q404

Q407

R-CH

M+9V

REC/PB

HEAD

ERASE HEAD

Q301,302

T300

L - CH

R - CH

REC(FWD)

R-CH is omitted due to same as L-CH.

A TRIGGER DRIVE

Q001,003

CAPSTAN MOTOR DRIVE

Q002,004

4

1

2

TABLE ADDRESS SENSOR

IC731

TBL MOTOR DRIVER

IC712

M+9V

Q731

RE701

ROTARY ENCODER

DISC TRAY

ADDRESS DETECT

S751

OPEN/CLOSE

DETECT

TBL SENSE

OPENSW

46

MOTOR

DRIVE

M741

(TABLE)

M

TM F

FIN

RIN

39

TM R

38

7

9

OUT2

OUT1

2

4

MUTE SW

Q409,410

B-TRIG

79

TC-RELAY

82

RELAY SW

Q408

+9V

: TAPE PLAY

: TUNER

: RECORD

Signal Path

D

E

SECTION

(Page 25)

SECTION

25 25

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

5-4. BLOCK DIAGRAM — MAIN SECTION —

J1001

J020

RCH

L

R

AUDIO

IN

INPUT SELECT SWITCH

IC400

MIC AMP

IC1000

(1/2)

MIC AMP

IC1000

(2/2)

RV1001

MIC

LEVEL

MIC-DET

AUDIO IC CLOCK

AUDIO IC DATA

LINE MUTE

SYSTEM CONTROL

IC500 (3/6)

9SA2

CD-L

42

76

52 53 51

METER LEVEL

71

VAC-IN

70

RCH

L

R

VIDEO

IN

DBFB

SWITCH

Q128

ST-L

TAPE_ PB-L

X

TAPE/TUNER

E

AMP/SUBWOOFER

RF/SERVO

REC OUT L

TAPE/TUNER

D

AMP/SUBWOOFER

DBFB F/B

R-IN

L-IN

45

TAPE-L

43

ST-L

41

VIDEO-L

44

PC-L

46

MIC

FL-IN

26

OUTL

36

RECBL

25

AGCOUTL

23

SWOUT

27

BB2L

48

REFOUT

28

BB1L

DATA

21

22

CLOCK

RECAR

RECAL

SW OUT

MUTE

Q270

MUTE

Q245

Q721

SWITCH

LINE MUTE

Q290

Q210

J1004

MIC

METER LEVEL

AMP

IC252

GTR7

GTR8/8B

IC253 IC254

IC730

8

CIG-CLK

GIG-BK

CIG-DATA

GIG-LATCH

VF+

VF-

D+3.3V

+VG

35 282637

15

3

1113

ND900

1012484546 479

Q901

7

5

3

37

6

1

IC251

USB RECORD

PREAMP

: AUDIO

: TAPE PLAY

: MIC

: REC

: CD PLAY

: TUNER

Signal Path

R-CH is omitted due to same as L-CH.

CD LCH

RF/SERVO

Q903Q902

SWITCH SWITCH

GTR7/8/8B

XB

XC

I

J

F

G

SECTION

(Page 23)

(Page 24)

(Page 26)

SECTION

(Page 24)

(Page 23)

SECTION

2626

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

5-5. BLOCK DIAGRAM — AMP/SUBWOOFER SECTION —

IC1301: GTR7/8/8B IC1300: GTR6/6B

MUTING

Q1312

-1314

FR-IN

DBFB F/B

FL-IN

31

STK MUTE

1216

OVERLOAD

DETECT

Q1303,1308

+ +

33 77

LINK RELAY

97

EEPROM_DATA

95

5 6

EEPROM_CLOCK

HP DET

AC-CUT

Q1301

FRONT REPLAY

Q1302

+VL

-VL

IN2

ST BY

+RE1

-RE1

+RE2

-RE2

+VCC

-VCC

+

-

+

FRONT SPEAKER

SUB WOOFER

OUT

L

R

HEADPHONE

J1005

RY1301

RY862

+

-

+

L

R

FAN

DRIVE

Q031-Q034

DRIVE

TH1301

THERMAL

DETECT

Q1309,Q1310

67

THERMAL VACS

TB801

JK1301

D104

18

11 10

22

9

14

8

SIGNAL PATH

POWER AMP

32

PROTECTOR

50

FR RELAY

56

FAN ON

G

MAIN

TH1300

11

4 5

6 7

3 2

13

SUBWOOFER POWER AMP

IC800

SYSTEM CONTROL

IC500 (5/6)

PROTECTOR

Q1305,Q1307

DC DETECT

Q1304,Q1306

OVERLOAD

DETECT

Q850

Q788 RELAY DRIVE

Q789

OVERLOAD

DETECT

Q800

RY1300

EXCEPT MX

GTR7/8/8B

HI SPEED

SWITCH

Q035

PROTECTOR

SWITCH

Q532

+

-

+

SURROUND SPEAKER

L

R

JK1300

RELAY DRIVE

Q1300

45

SW-RELAY

R-CH is omitted due to same as L-CH.

EEPROM

IC675

FAN DETACT

Q030

GTR8 / GTR8B

SUB WOOFER

OUT

+

-

TB802

GTR7

GTR7/8/8B

GTR7/8

UNREG

+VH

STANDBY

Q1315, Q1316

: AUDIO

IN1

SW-R IN

SW-L IN

AC DETACT

15

M891

DC FAN

M892

21

AC CUT DETECT

FAN

DRIVE

Q821,824,825

Q036,038,039

M893

DC FAN

FAN

F

MAIN

I

MAIN

SECTION

(Page 25)

H

DISPLAY/POWER

SECTION

(Page 27)

27 27

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

5-6. BLOCK DIAGRAM — DISPLAY/POWER SECTION —

M

MOTOR

DRIVE

IC701

MOTOR(LD)

M751

9 7

+5V

3.3V

94 MASTER VOL

STK MUTE

LMR

MASTER

VOLUME

88 ADKEY1

90 ADKEY2

73 POWER KEY

S945,S950-54,

S908-06

4 SIRCS

X514

5MHz

15 X-IN

13 X-OUT

X510

32.768kHz

10 XC-IN

11

36

34

XC-OUT

SYSTEM CONTROL

IC500 (6/6)

68STBY-RELAY

12RESET

20AC-CUT

D1203

RECT

D1314

RECT

D1313

+VL

F1261

VL

VH

VP

VF

GND

F1251

F1241

F1231

R1271

-VL

+VH

-VH

+33V

REGULATOR

Q1250

POWER ON/OFF

RELAY DRIVE

Q1200

+ VG

(+32V)

D1252

RECT

VF+

VF-

ND900

VACUUM

FRUORESCENT

DISPLAY

RY1200

PT1250 POWER

TRANSFORMER

RESET

SWITCH

Q005

REMOTE CONTROL

SIGNAL RECEIVER

IC900

EVER +10V

AC-CUT DETACT

93 OP DIAL

ENCODER

ROTARY

ENCODER

OPERATION

DIAL

69OVER_VOLTAGE_DET

RECT

D600

M +9V

LED +9V

ST+9V

3

27USB_OE

55

MTK_POWER_CONTROL

+3.3V

+9V

+AVDD5V

+9V

+DVDD5V

AC3

F1271

F1281

UNREG/UNREGULATE

S936

S935

+9V REG

IC200

+9V REG

IC055

+4V REG

IC676

+5V REG

IC065

+3.3V REG

IC095

S916,S918,S920,S922, S924,S926,S928,S930, S932,S934,S936,S938,

S940-42

89 ADKEY0

34

31

S915,S917,S919,S921,

S923,S925,S927,S929,S931,

CLK1

RXD1

TXD1

RTS1

CN VSS

RESET

GTR7/8/8B

CN040

(FOR PROGRAMMING)

LINK RELAY

PROTECTOR

32

33

CNVss

RESET

12

9

D901

D900

LED

SWITCH

Q900

LED +9V

EVER 3.3V

STBY LED

2 LED DRIVER-DATA

LED DRIVER-CLOCK

7

1

41

LED DRIVER-LATCH

LED DRIVER-OE

4

8

6

5

1, 2,

21

|

24

15

|

20

LATCH

IC901

LED +9V

D923-928

D922, D929-931

+3.3V REG

Q007-009

D1201

D010

D1202

EVER 3.3V

Q006

SUB POWER

TRANSFORMER

PT1200

8

6

D1253-1256

S1200

AC IN

230-240V

220V

120V/127V

VOLTAGE

SELECTOR

11

12

13

D1022

D1021

D1020

14

D919

GTR7/8/8B

Q712,Q717

RECT

Q713,Q714

RECT

Q720

RECT

Q719

RECT

Q696,Q718

AMP/SUFWOOFER

H

S933,S937

SECTION

(Page 26)

2828

HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B

5-7. CIRCUIT BOARDS LOCATION

Motor Drive board included in METER DISPLAY ASSY

MAIN board

HEAD PHONE board

MIC CD board

CD SW board

STR board

Display board

SW board included in METER DISPLAY ASSY

LED board included in METER DISPLAY ASSY

USB CD board

MIC RV board

• Note For Printed Wiring Boards And Schematic Diagrams

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• : Pattern from the side which enables seeing.

(The other layer’s patterns are not indicated.)

Caution: Pattern face side: Parts on the pattern face side seen from (Conductor Side) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (Component Side) the parts face are indicated.

• Indication of transistor.

• A : B+ Line.

• B : B– Line.

• Voltage and waveforms are dc with respect to ground under no-signal (detuned) conditions.

• BD93 and Driver sections. no mark : CD PLAY

• Except BD93 and Driver sections. no mark : FM ( ) : CD PLAY < > : TAPE PLAY [ ] : TAPE REC ∗ : Impossible to measure

• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal production

tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production

tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : AUDIO f : TUNER E : TAPE PLAY G : TAPE REC N : MIC J : CD PLAY c : DIGITAL I : USB

• Abbreviation

E2 : 120V AC area in E model E3 : 240V AC area in E model E51 : Chilean and Peruvian model AR : Argentina model AUS : Australian model MX : Mexican model

Note: The components identiﬁ ed by mark 0 or dotted line

with mark 0 are critical for safety.

Replace only with part number speciﬁ ed.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C.

Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to ﬂ ow) than

ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also

be added to ordinary solder.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/

4

W or less unless otherwise

speciﬁ ed.

• 2 : nonﬂ ammable resistor.

• C : panel designation.

• Abbreviation MX : Mexican model

TRANS board

SUBTRANS board

TUNER PACK

FRONT board

SUBWOOFER board

DMB19 board

C

Q

B

These are omitted.

E

Q

CE

These are omitted.

Q

CE

These are omitted.

HUB board

SW board

MOTOR (LD) board

MOTOR (TB) board

SENSOR board

DRIVER board

SONY HCD-GTR6, HCD-GTR6B, HCD-GTR7, HCD-GTR8, HCD-GTR8B Service Manual

TABLE OF CONTENTS

DISASSEMBLY

1-1. CASE (TOP)

1-2. TAPE MECHANISM DECK (only for HCD-GTR6B/GTR8B)

1-3. LOADING PANEL

1-4. FRONT PANEL SECTION

1-5. MIC BOARD, USB BOARD, MICRV BOARD, HEADPHONE BOARD

1-6. DISPLAY BOARD, STR BOARD, CD SW BOARD

1-7. TUNER PACK

1-8. SUBTRANS BOARD

1-9. DC FAN, POWER TRANSFORMER (PT1250)

1-10. MAIN BOARD, FRONT BOARD SECTION

1-11. FRONT BOARD, SUBWOOFER BOARD

1-12. BACK PANEL SECTION, DC FAN

1-13. CD BLOCK SECTION

1-14. DMB19 BOARD, GTH HUB BOARD

1-15. DRIVER MT BOARD, SW MT BOARD

1-16. OPTICAL PICK-UP

1-17. SENSOR BOARD

1-18. MOTOR (TB) BOARD

1-19. MOTOR (LD) BOARD

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

DIAGRAMS

5-1. BLOCK DIAGRAM — USB SECTION —

5-2. BLOCK DIAGRAM — RF/SERVO SECTION —

5-3. BLOCK DIAGRAM — TAPE/TUNER SECTION —

5-4. BLOCK DIAGRAM — MAIN SECTION —

5-5. BLOCK DIAGRAM — AMP/SUBWOOFER SECTION —

5-6. BLOCK DIAGRAM — DISPLAY/POWER SECTION —

5-7. CIRCUIT BOARDS LOCATION