HCD-RG110
Table of contents
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1
Ver 1.0 2003. 04
SERVICE MANUAL
AEP Model
UK Model
HCD-RG110
Amplifier section
DIN power output (rated)
50 + 50 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
60 + 60 watts (6 ohms at
1 kHz, 10% THD)
Music power output (reference)
120 + 120 watts (6 ohms
at 1 kHz, 10% THD)
Inputs
AUDIO INPUT (phono jack):
voltage 250 mV,
impedance 47 kilohms
Outputs
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
Front speaker: accepts impedance of 6 to
16 ohms
SPECIFICATIONS
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 2 Hz – 20 kHz (±0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassette
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-877-259-01
2003D0400-1
© 2003. 04
– Continued on next page –
MINI HI-FI COMPONENT SYSTEM
• HCD-RG110 are the tuner, deck, CD
and amplifier section in MHC-RG110.
Model Name Using Similar Mechanism HCD-RL3
CD
CD Mechanism Type CDM58F-K6
Section
Optical Pick-up Name
KSM-213DCP/Z-NP
Tape deck Model Name Using Similar Mechanism HCD-RL3
Section Tape Transport Mechanism Type CWL43FF48
2
HCD-RG110
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 531 – 1,602 kHz (with the
interval set at 9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
European models: 230 V AC, 50/60 Hz
Power consumption 105 watts
0.5 watts (at the Power
Saving Mode)
Dimensions (w/h/d) Approx. 280 × 325 × 412 mm
Mass Approx. 8.5 kg
Supplied accessories: Remote Commander (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Front speaker pads (8)
Design and specifications are subject to change without
notice.
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.
This appliance is classified as a CLASS 1 LASER product. This
label is located on the rear exterior.
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down 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 flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective 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.
3
HCD-RG110
TABLE OF CONTENTS
1. GENERAL ..........................................................................4
2. DISASSEMBLY ................................................................6
2-1. Case (Top)..................................................................... 6
2-2. CD Door........................................................................ 7
2-3. Front Panel Section....................................................... 7
2-4. CD Mechanism Deck (CDM58F-K6) .......................... 8
2-5. Tape Mechanism Deck (CWL43FF48)......................... 8
2-6. REM Board and PANEL Board .................................... 9
2-7. KEY Board ................................................................... 9
2-8. Back Panel Section ..................................................... 10
2-9. SUB TRANS Board, VIDEO OUT Board and
SENSOR Board .......................................................... 10
2-10. MAIN Board ............................................................... 11
2-11. POWER Board............................................................ 11
2-12. TRANS Board ............................................................ 12
2-13. CD Board and DRIVER Board................................... 12
2-14. SPDL Board................................................................ 13
2-15. Optical Pick-up (KSM-213DCP)................................ 13
2-16. MOTOR Board, ADDRESS SENSOR Board ............ 14
2-17. Table (New), Cam (Control) and DC Motor............... 14
3. TEST MODE.................................................................... 15
4. ELECTRICAL ADJUSTMENTS ............................... 17
5. DIAGRAMS...................................................................... 19
5-1. Circuit Boards Location.............................................. 19
5-2. Block Diagrams .......................................................... 20
5-3. Printed Wiring Boards – CD Section (1/2) – .............. 22
5-4. Printed Wiring Boards – CD Section (2/2) – .............. 23
5-5. Schematic Diagram – CD Section – ........................... 24
5-6. Printed Wiring Board – MAIN Board – ..................... 25
5-7. Schematic Diagram – MAIN Board (1/4) – ............... 26
5-8. Schematic Diagram – MAIN Board (2/4) – ............... 27
5-9. Schematic Diagram – MAIN Board (3/4) – ............... 28
5-10. Schematic Diagram – MAIN Board (4/4) –................ 29
5-11. Printed Wiring Boards – PANEL Section – ................ 30
5-12. Schematic Diagram – PANEL Section – .................... 31
5-13. Printed Wiring Boards – POWER/TRANS Section – 32
5-14. Schematic Diagram – POWER/TRANS Section –..... 33
5-15. IC Pin Function Description ....................................... 36
6. EXPLODED VIEWS...................................................... 38
6-1. Main Section ............................................................... 38
6-2. Front Panel Section..................................................... 39
6-3. MAIN Board Section .................................................. 40
6-4. CD Mechanism Deck Section (CDM58F-K6) ........... 41
6-5. Optical Pick-up Section (KSM-213DCP)................... 42
7. ELECTRICAL PARTS LIST....................................... 43
4
HCD-RG110
This section is extracted
from instruction manual.
SECTION 1
GENERAL
BUTTON DESCRIPTIONS
?/1 (power) 1
Z OPEN/CLOSE qs
Z (deck B) qg
M qk
. qk
> qk
X qk
N qk
x qk
m qk
Z (deck A) wa
Main unit
ALPHABETICAL ORDER
A – E
AUDIO jacks ws (24)
CD wj (11, 12, 18)
CD SYNC 7 (18)
Deck A w; (16, 17)
Deck B qh (16 – 19)
DISC 1 – 3 0 (11, 12)
DISC SKIP/EX-CHANGE qa (10,
11)
Disc tray 9 (10)
DISPLAY 2 (16, 21)
EFFECT ON/OFF qj (20)
G – Z
GAME wf (22, 24)
GAME EQ ql (20, 24)
GAME MIXING 4 (22)
GROOVE 6 (20)
MOVIE EQ 5 (20)
MUSIC EQ 9 (20)
PHONES jack qf
REC PAUSE/START 8 (18)
TAPE A/B wg (16, 18)
TUNER/BAND wh (13 – 15, 18)
VIDEO jack wd (24)
VOLUME control qd
123 549
0
678
qd
qf
qg
qh
qa
qs
qjqkql
w;
wa
wd
ws
wf
wg
wh
wj
5
HCD-RG110
Setting the clock
1
Press ?/1 to turn on the system.
2
Press CLOCK/TIMER SET on the
remote.
3
Press . or > on the remote
repeatedly to set the hour.
4
Press ENTER on the remote.
The minute indication flashes.
5
Press . or > on the remote
repeatedly to set the minute.
6
Press ENTER on the remote.
The clock starts working.
To adjust the clock
1 Press CLOCK/TIMER SET on the remote.
2 Press . or > on the remote to select
“CLOCK SET”, then press ENTER on the
remote.
3 Do the same procedures as step 3 to 6
above.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
12 34
5
6
7
8
9
0
qa
qs
qd
qf
qg
qh
qj
qk
ql
w;
wa
Remote Control
ALPHABETICAL ORDER
A – G
CD ql (11, 12, 18)
CLEAR w; (12)
CLOCK/TIMER SELECT 2
(19, 23)
CLOCK/TIMER SET 9 (10, 19,
23)
DISPLAY 6 (16, 21)
D.SKIP 7 (11)
ENTER qg (10, 12 – 14, 19, 23)
EQ +/– qf (20)
GAME 0 (22, 24)
GROOVE qd (20)
O – Z
ON/OFF qh (20)
PLAY MODE wa (11, 12, 17)
PRESET +/– 5 (13 – 15)
REPEAT 8 (11)
SLEEP 1 (22)
STEREO/MONO 8 (15)
SURROUND qa (20)
TAPE A/B 9 (16, 18)
TUNER MEMORY qj (13, 14)
TUNER/BAND qk (13 – 15, 18)
TUNING +/– 5 (13 – 15)
VOL +/– qs
BUTTON DESCRIPTIONS
?/1 (power) 4
M 5
. 5
> 5
X 5
N 5
m 5
x 5
6
HCD-RG110
SECTION 2
DISASSEMBLY
Note : Disassemble the unit in the order as shown below.
Note : Follow the disassembly procedure in the numerical order given.
2-1. Case (Top)
CD DOOR CD MECHANISM DECK (CDM58F-K6)CASE (TOP) FRONT PANEL SECTION
BACK PANEL SECTION
KEY BOARDREM BOARD AND PANEL BOARDTAPE MECHANISM DECK (CWL43FF48)
MOTOR BOARD,
ADDRESS SENSOR
BOARD
SET
OPTICAL PICK-UP (KSM-213DCP)
TRANS BOARD
SUB TRANS BOARD, VIDEO OUT BOARD AND SENSOR BOARD
POWER BOARD
SPDL BOARD
MAIN BOARD
CD BOARD AND DRIVER BOARD
TABLE (NEW),CAM (CONTROL) AND DC MOTOR
case (Side-R)
case (Side-L)
5
qd
qs
qs
q;
qf
case (Top)
6
two screws (Case 3 TP2)
8
screw
(+BVTP 3
×
8)
3
screw
(+BVTP 3
×
8
)
9
screw
(+BVTT 3
×
8)
4
screw
(+BVTT 3
×
8)
1
two screws
(Case 3 TP2)
qa
four screws (+BVTP 3
×
10)
7
screw (Case 3 TP2)
2
screw (Case 3 TP2)
7
HCD-RG110
2-2. CD Door
2-3. Front Panel Section
2
Pull-out the disc tray.
1
Turn the pulley to the direction of arrow.
pulley
4
CD door
Front panel side
CD mechanism deck (CDM58F-K6)
3
1
three screws (+BVTT 3
×
6)
9
wire (flat type) 13p (CN207)
7
wire (flat type)
19p (CN733)
qa
connector 7p (CN202)
qs
front panel
0
connector 3p (CN303)
8
connector 3p (CN201
)
6
connector 2p (CN682)
3
screw (+BVTP 3
×
10)
4
screw (+BVTP 3
×
10)
2
screw (+BVTP 3
×
10)
5
8
HCD-RG110
2-4. CD Mechanism Deck (CDM58F-K6)
2
connector 7p (CN734)
4
CD mechanism deck (CDM58F-K6)
3
1
screw (+BVTP 3
×
10
)
2-5. Tape Mechanism Deck (CWL43FF48)
1
six
screws
(+BVTP 2.6
×
8
)
3
tape mechanism deck
(CWL43FF48)
2
three ground wires
9
HCD-RG110
2-6. REM Board and PANEL Board
5
Remove the solderin
g
(three portions)
4
connector
13p (CN662)
four
claws
two claws
claw
7
PANEL board
6
REM
board
REM
board
1
volume knob
2
3
eight
screws
(+BVTP 2.6
×
8
)
2-7. KEY Board
2
KEY board
two claws
three claws
1 four
screws
(+BVTP 2.6
× 8
)
10
HCD-RG110
2-8. Back Panel Section
3
connector
3p (CN903)
5
1
four
screw
(+BVTP 3
×
10
)
2
two
screw
(+BVTT 3
×
6)
4
connector
2p (CN505)
6
back panel
2-9. SUB TRANS Board, VIDEO OUT Board and SENSOR Board
5
two
screws (+BVTP 3
×
10)
1
screw (+BVTP 3
×
10)
2
SUB TRANS board
4
VIDEO board
3
screw (+BVTP 3
×
10)
6
cover (duct)
11
HCD-RG110
2-10. MAIN Board
2-11. POWER Board
2 t
hree screws (+BVTT 3
×
6)
3
1 t
wo screws (+BVTT 3
×
6)
7 h
eat sink
4 t
wo screws (+BVTP 3
× 1
6)
6 POWER
board
5
connector 13p (CN915)
3
connector 13p (CN502)
2
connector 13p (CN503)
Main board
1
screw (+BVTT 3
×
6
)
4
MAIN board
12
HCD-RG110
2-12. TRANS Board
3 TRANS board
1 two
screws (+BVTT 4
×
6)
2 two
screws (+BVTT 4
×
6)
2-13. CD Board and DRIVER Board
3
four s
crews (+BTTP M2.6
)
4
2
wire (flat type)
16p (CN731)
7
wire (flat type)
8p (CN702)
8
DRIVER board
5
CD board
6
Screw (+BTTP M2.6
)
1
connector 10p (CN735)
13
HCD-RG110
2-14. SPDL Board
2-15. Optical Pick-up (KSM-213DCP)
0
optical pick-up
(KSM-213DCP)
9
5 two
screws (+PTPWH M2.6
)
1
screw (+PTPWH M2.6)
6
screw (DIA. 12)
3
two screws (+BTTP M2.6)
8
two insulators
2
holder (BU) assy
7
two insulators
4
two stoppers (BU)
1 Remove solder (four places)
2 Remove solder (four places)
3 SPDL board
14
HCD-RG110
2-16. MOTOR Board, ADDRESS SENSOR Board
1
Pull out the disc tray.
5
two
screws (+BTTP M2.6)
2
screw (+PTPWH 2.6
×
8)
3
tray
8
screw (+BTTP M2.6)
7
MOTOR board
9
ADDRESS SENSOR board
6
Remove the two solderings of motor.
4
connector 4p (CN722)
2-17. Table (New), Cam (Control) and DC Motor
*Cautions of an assembly
7 DC
motor (TURN)
claw
claw
6 belt
5 pulley (S)
4 gear (U)
2 screw (STEP)
3 cam (CONTROL)
1 table (NEW)
DC
motor (TURN)
pulley (S)
15
HCD-RG110
SECTION 3
TEST MODE
[Change-over of AM Tuner Step between 9 kHz and
10 kHz]
•A step of AM channels can be changed ov er between 9 kHz and
10 kHz. (Except AEP/UK models)
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
button to select the BAND “AM”.
3. Press ?/1 button to turn the set OFF.
4. Press TUNER/BAND and ?/1 buttons simultaneously, and
the display of fluorescent indicator tube changes to “AM 9 k
STEP” or “ AM 10 k STEP”, and thus the channel step is changed
over.
[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 three buttons x , GROOVE , and ?/1 simultaneously.
2. The fluorescent indicator tube displays “COLD RESET” and
the set is reset.
[Aging Mode]
This mode can be used for operation check of CD section and tape
deck section.
• If an error occurred:
The aging operation stops and is displayed status.
• If no error occurs:
The aging operation continues repeatedly.
1. Operating method of Aging Mode
Turn on the main power and select “CD” of the function.
1) Set three discs in tray. Select ALL DISCS, and REPEAT OFF .
2) Load the tapes recording use into both decks.
3) Press three buttons x , GAME EQ , and
DISC SKIP/EX-CHANGE simultaneously.
4) Aging operations of CD and tape are started at the same time.
5) To exit the aging mode, perform [Cold Reset].
2. Aging mode in CD section
1) Operation during aging mode
• In the agining mode ,the program is excuted in the following
sequence.
(1) The disc tray opens and closes.
(2) The disc tray turns to select a disc 3.
(3) The pickup accesses to the first track, and plays 3 seconds.
(4) The pickup accesses to the last track, and plays 3 seconds.
(5) The disc tray opens and closes.
(6) The disc tray turns to select a disc 1.
(7) The same operation starts like step (3).
(8) After a disc 1 aging operation, a disc 2 is selected.
(9) When an aging operation of a disc 3 is completed, the display
“AGING
∗∗∗∗” value increases.
(10) If no error occurs, the aging operation continues repeatedly.
2) Error display
Step
1
2
3
4
5
6
7
8
9
10
11
12
Operation
Rewind the TAPE A
Rewind the TAPE B
Play the TAPE A (1 minute)
Stop the TAPE A (1 second)
Play the TAPE A (3 minutes)
Rewind(AMS) the TAPE A
F.F.(AMS) the TAPE A
Play the TAPE B (1 minute)
Stop the TAPE B (1 second)
Record the TAPE B (3 minutes)
Rewind(AMS) the TAPE B
F.F.(AMS) the TAPE B
Display
TAPE AAG-1
TAPE BAG-2
TAPE AAG-2
TAPE AAG-3
TAPE AAG-4
TAPE AAG-5
TAPE AAG-6
TAPE BAG-2
TAPE BAG-3
TAPE BAG-4
TAPE BAG-5
TAPE BAG-6
Disc error
Display Error
E00D01022 Focus error (No disc)
E00D02022 Sub Q error (Focus is good)
E00D02023 TOC reading error
E00D02014 Access error (Unable within regular time)
Mechanism error
Display Error
E00M__E_0 Error during opening tray
E00M__C_2 EX-CHANGE disc error
E00M__D_0 Error during closing tray
E00M__F_3 EX-OPEN error
E00M__D_5 EX-CLOSE error
E00M__C_2 Chuck-up error
E00M__C_3 Unchucking error
3. Aging mode in Tape Deck section
1) Operation during aging mode
• In the ag ining mode, the program is excuted in the following
sequence.
2) Error display
• If err or occurred, the display remains like “TAPE BAG-2”.
4. Exiting from the aging mode
• Be sure to perf orm Cold Reset to exit from the aging mode.
16
HCD-RG110
[MC T est Mode]
•This mode is used to test the function of the equalizer.
Procedure:
1. Press ?/1 button to turn the set ON.
2. To enter the test mode, press the three buttons x , GAME EQ
and DISC 3 simultaneously.
3. Press the MOVIE EQ button.
The function of the equalizer is set to “MIN”.
4. Press the MUSIC EQ button.
The function of the equalizer is set to “MAX”.
5. Press the P.FILE button.
The function of the equalizer is set to “FLAT”.
6. To exit from this mode, press ?/1 button to turn the set OFF.
[CD Ship Mode (No Memory Clear) ]
•This mode moves the pickup to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. Press ?/1 button to turn the set OFF.
4. Press CD button and ?/1 button simultaneously.
5. The "STANDBY" display blinks instantaneously, and the CD
ship mode is set.
[GC T est Mode]
• All fluorecent segments and LEDs are tested.
•Keyboard check.
Procedure:
1. Press ?/1 button to turn the set ON.
2. To enter the test mode, press the three buttons x , GAME EQ
and DISC 2 simultaneously.
3. All segments and LEDs (without STANDBY LED) are turned
on.
4. Press GAME EQ and DISC 2 buttons simultaneously, and the
key check mode is activated.
5. The message “KEY 0 0 0 0” is displayed.
Each time a button is pressed, the key code number is displayed.
6. Press GAME EQ and DISC 2 buttons simultaneously, and the
key count mode is activated.
7. The message “KEYCNT 0 1” is displayed.
Each time a button is pressed, “KEYCNT 0 1” value increased.
However, once a button is pressed, it is no longer taken into
account.
8. Press GAME EQ and DISC 2 buttons simultaneously, and the
head phone detect mode is activated.
9. The message “H_P OFF” is displayed when a headphone jack
is not inserted.
“H_P ON ” is displayed when a headphone jack is inserted.
10. Press GAME EQ and DISC 2 buttons simultaneously, and the
volume control detect mode is activated.
11. The message “VOLUME FLAT” is displayed.
“VOLUME UP” is displayed if rotating VOLUME knob
clockwise, or “VOLUME DOWN” is displayed if rotating
counterclockwise.
12. To exit from the GC test mode after the volume control detect
mode, press GAME EQ and DISC 2 buttons simultaneously .
[Version and Destination Display Mode]
•The version or destination is displayed.
Procedure:
1. Press ?/1 button to turn the set ON.
2. To enter the test mode, press the three buttons x , GAME EQ
and MOVIE EQ simultaneously.
3. The destination is displayed.
4. Press STOP and GROOVE buttons simultaneously.
5. The version is displayed.
6. To exit from this mode, press ?/1 button to turn the set OFF.
[CD Service Mode]
•This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. To enter the test mode, press three buttons x , GAME EQ ,
and OPEN/CLOSE simultaneously.
4. The CD service mode is selected.
5. With the CD in stop status, press
> button to move the pickup
to outside track, or press . button to inside track.
6. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press ?/1 button to turn the set OFF.
Note: • Always move the pickup to most inside track when exiting from
this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be
chipped.
+
–
17
HCD-RG110
SECTION 4
ELECTRICAL ADJUSTMENTS
FM T uned Level Adjustment
Procedure:
1. Supply a 98 MHz signal at 28 dB from the ANTENN A terminal.
2. Tune the set to 98 MHz.
3. Adjust RV101 to the point (moment) when the TUNED
indicator will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
Procedure:
1. Supply a 98 MHz signal at 60 dB from the ANTENN A terminal.
2. Tune the set to 98 MHz.
3. Measure volta ge between pin 21 and pin 23 of IC 101. Adjust
T101 until the voltage becomes 0 V.
Adjustment Location: MAIN board
[MAIN BOARD] Component side
FM RF Signal generator
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 30 dB (at 75
Ω
open)
FM ANTENNA terminal
(JK103)
set
FM RF Signal generator
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Ω
open)
FM ANTENNA terminal
(JK103)
set
AM RF Signal generator
30% amplitude
modulation by
400Hz signal
output level : as low as possible
AM ANTENNA termina
l
(JK103)
set
AM IF Adjustment
TUNER SECTION
Procedure:
1. Set the frequenc y of the AM RF signal generator to 1000 kHz
(at 10 kHz step) or 999 kHz (at 9 kHz step).
2. T une the set to AM 1000 kHz (at 10 kHz step) or 999 kHz (at 9
kHz step).
3. Adjust IFT101 so that the reading on level meter becomes in
maximum.
headphones jack (JK691)
level meter
set
16
Ω
T101: NULL
IFT101: AM IF
RV101:
FM TUNED LEVEL
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